...

ffmpeg/libavutil/Makefile

@@ -0,0 +1,316 @@
+NAME = avutil
+DESC = FFmpeg utility library
+
+HEADERS = adler32.h                                                     \
+          aes.h                                                         \
+          aes_ctr.h                                                     \
+          ambient_viewing_environment.h                                 \
+          attributes.h                                                  \
+          audio_fifo.h                                                  \
+          avassert.h                                                    \
+          avstring.h                                                    \
+          avutil.h                                                      \
+          base64.h                                                      \
+          blowfish.h                                                    \
+          bprint.h                                                      \
+          bswap.h                                                       \
+          buffer.h                                                      \
+          cast5.h                                                       \
+          camellia.h                                                    \
+          channel_layout.h                                              \
+          common.h                                                      \
+          container_fifo.h                                              \
+          cpu.h                                                         \
+          crc.h                                                         \
+          csp.h                                                         \
+          des.h                                                         \
+          detection_bbox.h                                              \
+          dict.h                                                        \
+          display.h                                                     \
+          dovi_meta.h                                                   \
+          downmix_info.h                                                \
+          encryption_info.h                                             \
+          error.h                                                       \
+          eval.h                                                        \
+          executor.h                                                    \
+          fifo.h                                                        \
+          file.h                                                        \
+          film_grain_params.h                                           \
+          frame.h                                                       \
+          hash.h                                                        \
+          hdr_dynamic_metadata.h                                        \
+          hdr_dynamic_vivid_metadata.h                                  \
+          hmac.h                                                        \
+          hwcontext.h                                                   \
+          hwcontext_cuda.h                                              \
+          hwcontext_d3d11va.h                                           \
+          hwcontext_d3d12va.h                                           \
+          hwcontext_drm.h                                               \
+          hwcontext_dxva2.h                                             \
+          hwcontext_amf.h                                               \
+          hwcontext_qsv.h                                               \
+          hwcontext_mediacodec.h                                        \
+          hwcontext_opencl.h                                            \
+          hwcontext_oh.h                                                \
+          hwcontext_vaapi.h                                             \
+          hwcontext_videotoolbox.h                                      \
+          hwcontext_vdpau.h                                             \
+          hwcontext_vulkan.h                                            \
+          iamf.h                                                        \
+          imgutils.h                                                    \
+          intfloat.h                                                    \
+          intreadwrite.h                                                \
+          lfg.h                                                         \
+          log.h                                                         \
+          lzo.h                                                         \
+          macros.h                                                      \
+          mathematics.h                                                 \
+          mastering_display_metadata.h                                  \
+          md5.h                                                         \
+          mem.h                                                         \
+          motion_vector.h                                               \
+          murmur3.h                                                     \
+          opt.h                                                         \
+          parseutils.h                                                  \
+          pixdesc.h                                                     \
+          pixelutils.h                                                  \
+          pixfmt.h                                                      \
+          random_seed.h                                                 \
+          rc4.h                                                         \
+          rational.h                                                    \
+          refstruct.h                                                   \
+          replaygain.h                                                  \
+          ripemd.h                                                      \
+          samplefmt.h                                                   \
+          sha.h                                                         \
+          sha512.h                                                      \
+          spherical.h                                                   \
+          stereo3d.h                                                    \
+          tdrdi.h                                                       \
+          threadmessage.h                                               \
+          time.h                                                        \
+          timecode.h                                                    \
+          timestamp.h                                                   \
+          tree.h                                                        \
+          twofish.h                                                     \
+          uuid.h                                                        \
+          version.h                                                     \
+          video_enc_params.h                                            \
+          xtea.h                                                        \
+          tea.h                                                         \
+          tx.h                                                          \
+          video_hint.h
+
+ARCH_HEADERS = bswap.h                                                  \
+               intmath.h                                                \
+               intreadwrite.h                                           \
+               timer.h                                                  \
+
+BUILT_HEADERS = avconfig.h                                              \
+                ffversion.h
+
+OBJS = adler32.o                                                        \
+       aes.o                                                            \
+       aes_ctr.o                                                        \
+       ambient_viewing_environment.o                                    \
+       audio_fifo.o                                                     \
+       avstring.o                                                       \
+       avsscanf.o                                                       \
+       base64.o                                                         \
+       blowfish.o                                                       \
+       bprint.o                                                         \
+       buffer.o                                                         \
+       cast5.o                                                          \
+       camellia.o                                                       \
+       channel_layout.o                                                 \
+       container_fifo.o                                                 \
+       cpu.o                                                            \
+       crc.o                                                            \
+       csp.o                                                            \
+       des.o                                                            \
+       detection_bbox.o                                                 \
+       dict.o                                                           \
+       display.o                                                        \
+       dovi_meta.o                                                      \
+       downmix_info.o                                                   \
+       encryption_info.o                                                \
+       error.o                                                          \
+       eval.o                                                           \
+       executor.o                                                       \
+       fifo.o                                                           \
+       file.o                                                           \
+       file_open.o                                                      \
+       float_dsp.o                                                      \
+       float_scalarproduct.o                                            \
+       film_grain_params.o                                              \
+       fixed_dsp.o                                                      \
+       frame.o                                                          \
+       hash.o                                                           \
+       hdr_dynamic_metadata.o                                           \
+       hdr_dynamic_vivid_metadata.o                                     \
+       hmac.o                                                           \
+       hwcontext.o                                                      \
+       iamf.o                                                           \
+       imgutils.o                                                       \
+       integer.o                                                        \
+       intmath.o                                                        \
+       lfg.o                                                            \
+       lls.o                                                            \
+       log.o                                                            \
+       log2_tab.o                                                       \
+       lzo.o                                                            \
+       mathematics.o                                                    \
+       mastering_display_metadata.o                                     \
+       md5.o                                                            \
+       mem.o                                                            \
+       murmur3.o                                                        \
+       opt.o                                                            \
+       parseutils.o                                                     \
+       pixdesc.o                                                        \
+       pixelutils.o                                                     \
+       random_seed.o                                                    \
+       rational.o                                                       \
+       refstruct.o                                                      \
+       reverse.o                                                        \
+       rc4.o                                                            \
+       ripemd.o                                                         \
+       samplefmt.o                                                      \
+       side_data.o                                                      \
+       sha.o                                                            \
+       sha512.o                                                         \
+       slicethread.o                                                    \
+       spherical.o                                                      \
+       stereo3d.o                                                       \
+       tdrdi.o                                                          \
+       threadmessage.o                                                  \
+       time.o                                                           \
+       timecode.o                                                       \
+       timecode_internal.o                                              \
+       timestamp.o                                                      \
+       tree.o                                                           \
+       twofish.o                                                        \
+       utils.o                                                          \
+       xga_font_data.o                                                  \
+       xtea.o                                                           \
+       tea.o                                                            \
+       tx.o                                                             \
+       tx_float.o                                                       \
+       tx_double.o                                                      \
+       tx_int32.o                                                       \
+       uuid.o                                                           \
+       version.o                                                        \
+       video_enc_params.o                                               \
+       video_hint.o                                                     \
+
+
+OBJS-$(CONFIG_CUDA)                     += hwcontext_cuda.o
+OBJS-$(CONFIG_D3D11VA)                  += hwcontext_d3d11va.o
+OBJS-$(CONFIG_D3D12VA)                  += hwcontext_d3d12va.o
+OBJS-$(CONFIG_DXVA2)                    += hwcontext_dxva2.o
+OBJS-$(CONFIG_AMF)                      += hwcontext_amf.o
+OBJS-$(CONFIG_LIBDRM)                   += hwcontext_drm.o
+OBJS-$(CONFIG_MACOS_KPERF)              += macos_kperf.o
+OBJS-$(CONFIG_MEDIACODEC)               += hwcontext_mediacodec.o
+OBJS-$(CONFIG_OHCODEC)                  += hwcontext_oh.o
+OBJS-$(CONFIG_OPENCL)                   += hwcontext_opencl.o
+OBJS-$(CONFIG_QSV)                      += hwcontext_qsv.o
+OBJS-$(CONFIG_VAAPI)                    += hwcontext_vaapi.o
+OBJS-$(CONFIG_VIDEOTOOLBOX)             += hwcontext_videotoolbox.o
+OBJS-$(CONFIG_VDPAU)                    += hwcontext_vdpau.o
+OBJS-$(CONFIG_VULKAN)                   += hwcontext_vulkan.o vulkan.o
+
+OBJS-$(!CONFIG_VULKAN)                  += hwcontext_stub.o
+
+OBJS += $(COMPAT_OBJS:%=../compat/%)
+
+# Object files to satisfy dependencies of other libraries for static builds
+STLIBOBJS-$(CONFIG_EXR_DECODER)         += half2float.o float2half.o
+STLIBOBJS-$(CONFIG_EXR_ENCODER)         += float2half.o
+STLIBOBJS-$(CONFIG_PHM_DECODER)         += half2float.o
+STLIBOBJS-$(CONFIG_PHM_ENCODER)         += float2half.o
+STLIBOBJS-$(CONFIG_SWSCALE)             += half2float.o
+
+# Windows resource file
+SHLIBOBJS-$(HAVE_GNU_WINDRES)           += avutilres.o
+
+SKIPHEADERS                            += objc.h
+SKIPHEADERS-$(HAVE_CUDA_H)             += hwcontext_cuda.h
+SKIPHEADERS-$(CONFIG_CUDA)             += hwcontext_cuda_internal.h     \
+                                          cuda_check.h
+SKIPHEADERS-$(CONFIG_D3D11VA)          += hwcontext_d3d11va.h
+SKIPHEADERS-$(CONFIG_D3D12VA)          += hwcontext_d3d12va.h
+SKIPHEADERS-$(CONFIG_DXVA2)            += hwcontext_dxva2.h
+SKIPHEADERS-$(CONFIG_AMF)              += hwcontext_amf.h               \
+                                          hwcontext_amf_internal.h
+SKIPHEADERS-$(CONFIG_QSV)              += hwcontext_qsv.h
+SKIPHEADERS-$(CONFIG_OPENCL)           += hwcontext_opencl.h
+SKIPHEADERS-$(CONFIG_VAAPI)            += hwcontext_vaapi.h
+SKIPHEADERS-$(CONFIG_VIDEOTOOLBOX)     += hwcontext_videotoolbox.h
+SKIPHEADERS-$(CONFIG_VDPAU)            += hwcontext_vdpau.h
+SKIPHEADERS-$(CONFIG_VULKAN)           += hwcontext_vulkan.h vulkan.h   \
+                                          vulkan_functions.h            \
+                                          vulkan_loader.h
+SKIPHEADERS-$(CONFIG_LIBSHADERC)       += vulkan_spirv.h
+SKIPHEADERS-$(CONFIG_LIBGLSLANG)       += vulkan_spirv.h
+
+TESTPROGS = adler32                                                     \
+            aes                                                         \
+            aes_ctr                                                     \
+            audio_fifo                                                  \
+            avstring                                                    \
+            base64                                                      \
+            blowfish                                                    \
+            bprint                                                      \
+            cast5                                                       \
+            camellia                                                    \
+            channel_layout                                              \
+            color_utils                                                 \
+            cpu                                                         \
+            crc                                                         \
+            des                                                         \
+            dict                                                        \
+            display                                                     \
+            encryption_info                                             \
+            error                                                       \
+            eval                                                        \
+            file                                                        \
+            fifo                                                        \
+            hash                                                        \
+            hmac                                                        \
+            hwdevice                                                    \
+            integer                                                     \
+            imgutils                                                    \
+            lfg                                                         \
+            lls                                                         \
+            log                                                         \
+            md5                                                         \
+            murmur3                                                     \
+            opt                                                         \
+            pca                                                         \
+            parseutils                                                  \
+            pixdesc                                                     \
+            pixelutils                                                  \
+            pixfmt_best                                                 \
+            random_seed                                                 \
+            rational                                                    \
+            ripemd                                                      \
+            sha                                                         \
+            sha512                                                      \
+            side_data_array                                             \
+            softfloat                                                   \
+            tree                                                        \
+            twofish                                                     \
+            utf8                                                        \
+            uuid                                                        \
+            xtea                                                        \
+            tea                                                         \
+
+TESTPROGS-$(HAVE_THREADS)            += cpu_init
+TESTPROGS-$(HAVE_LZO1X_999_COMPRESS) += lzo
+
+TOOLS = crypto_bench ffhash ffeval ffescape
+
+tools/crypto_bench$(EXESUF): ELIBS += $(if $(VERSUS),$(subst +, -l,+$(VERSUS)),)
+tools/crypto_bench.o: CFLAGS += -DUSE_EXT_LIBS=0$(if $(VERSUS),$(subst +,+USE_,+$(VERSUS)),)
+
+$(SUBDIR)tests/lzo$(EXESUF): ELIBS = -llzo2

ffmpeg/libavutil/aarch64/Makefile

@@ -0,0 +1,8 @@
+OBJS += aarch64/cpu.o                                                 \
+        aarch64/float_dsp_init.o                                      \
+        aarch64/tx_float_init.o                                       \
+
+NEON-OBJS += aarch64/float_dsp_neon.o                                 \
+             aarch64/tx_float_neon.o                                  \
+
+SVE-OBJS += aarch64/cpu_sve.o                                         \

ffmpeg/libavutil/aarch64/asm.S

@@ -0,0 +1,278 @@
+/*
+ * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#ifdef __ELF__
+#   define ELF
+#else
+#   define ELF #
+#endif
+
+#if HAVE_AS_FUNC
+#   define FUNC
+#else
+#   define FUNC #
+#endif
+
+#ifndef __has_feature
+#   define __has_feature(x) 0
+#endif
+
+#if HAVE_AS_ARCH_DIRECTIVE
+        .arch           AS_ARCH_LEVEL
+#endif
+
+#if HAVE_AS_ARCHEXT_DOTPROD_DIRECTIVE
+#define ENABLE_DOTPROD  .arch_extension dotprod
+#define DISABLE_DOTPROD .arch_extension nodotprod
+#else
+#define ENABLE_DOTPROD
+#define DISABLE_DOTPROD
+#endif
+
+#if HAVE_AS_ARCHEXT_I8MM_DIRECTIVE
+#define ENABLE_I8MM  .arch_extension i8mm
+#define DISABLE_I8MM .arch_extension noi8mm
+#else
+#define ENABLE_I8MM
+#define DISABLE_I8MM
+#endif
+
+#if HAVE_AS_ARCHEXT_SVE_DIRECTIVE
+#define ENABLE_SVE  .arch_extension sve
+#define DISABLE_SVE .arch_extension nosve
+#else
+#define ENABLE_SVE
+#define DISABLE_SVE
+#endif
+
+#if HAVE_AS_ARCHEXT_SVE2_DIRECTIVE
+#define ENABLE_SVE2  .arch_extension sve2
+#define DISABLE_SVE2 .arch_extension nosve2
+#else
+#define ENABLE_SVE2
+#define DISABLE_SVE2
+#endif
+
+DISABLE_DOTPROD
+DISABLE_I8MM
+DISABLE_SVE
+DISABLE_SVE2
+
+
+/* Support macros for
+ *   - Armv8.3-A Pointer Authentication and
+ *   - Armv8.5-A Branch Target Identification
+ * features which require emitting a .note.gnu.property section with the
+ * appropriate architecture-dependent feature bits set.
+ *
+ * |AARCH64_SIGN_LINK_REGISTER| and |AARCH64_VALIDATE_LINK_REGISTER| expand to
+ * PACIxSP and AUTIxSP, respectively. |AARCH64_SIGN_LINK_REGISTER| should be
+ * used immediately before saving the LR register (x30) to the stack.
+ * |AARCH64_VALIDATE_LINK_REGISTER| should be used immediately after restoring
+ * it. Note |AARCH64_SIGN_LINK_REGISTER|'s modifications to LR must be undone
+ * with |AARCH64_VALIDATE_LINK_REGISTER| before RET. The SP register must also
+ * have the same value at the two points. For example:
+ *
+ *   .global f
+ *   f:
+ *     AARCH64_SIGN_LINK_REGISTER
+ *     stp x29, x30, [sp, #-96]!
+ *     mov x29, sp
+ *     ...
+ *     ldp x29, x30, [sp], #96
+ *     AARCH64_VALIDATE_LINK_REGISTER
+ *     ret
+ *
+ * |AARCH64_VALID_CALL_TARGET| expands to BTI 'c'. Either it, or
+ * |AARCH64_SIGN_LINK_REGISTER|, must be used at every point that may be an
+ * indirect call target. In particular, all symbols exported from a file must
+ * begin with one of these macros. For example, a leaf function that does not
+ * save LR can instead use |AARCH64_VALID_CALL_TARGET|:
+ *
+ *   .globl return_zero
+ *   return_zero:
+ *     AARCH64_VALID_CALL_TARGET
+ *     mov x0, #0
+ *     ret
+ *
+ * A non-leaf function which does not immediately save LR may need both macros
+ * because |AARCH64_SIGN_LINK_REGISTER| appears late. For example, the function
+ * may jump to an alternate implementation before setting up the stack:
+ *
+ *   .globl with_early_jump
+ *   with_early_jump:
+ *     AARCH64_VALID_CALL_TARGET
+ *     cmp x0, #128
+ *     b.lt .Lwith_early_jump_128
+ *     AARCH64_SIGN_LINK_REGISTER
+ *     stp x29, x30, [sp, #-96]!
+ *     mov x29, sp
+ *     ...
+ *     ldp x29, x30, [sp], #96
+ *     AARCH64_VALIDATE_LINK_REGISTER
+ *     ret
+ *
+ *  .Lwith_early_jump_128:
+ *     ...
+ *     ret
+ *
+ * These annotations are only required with indirect calls. Private symbols that
+ * are only the target of direct calls do not require annotations. Also note
+ * that |AARCH64_VALID_CALL_TARGET| is only valid for indirect calls (BLR), not
+ * indirect jumps (BR). Indirect jumps in assembly are supported through
+ * |AARCH64_VALID_JUMP_TARGET|. Landing Pads which shall serve for jumps and
+ * calls can be created using |AARCH64_VALID_JUMP_CALL_TARGET|.
+ *
+ * Although not necessary, it is safe to use these macros in 32-bit ARM
+ * assembly. This may be used to simplify dual 32-bit and 64-bit files.
+ *
+ * References:
+ * - "ELF for the Arm® 64-bit Architecture"
+ *   https: *github.com/ARM-software/abi-aa/blob/master/aaelf64/aaelf64.rst
+ * - "Providing protection for complex software"
+ *   https://developer.arm.com/architectures/learn-the-architecture/providing-protection-for-complex-software
+ */
+#if defined(__ARM_FEATURE_BTI_DEFAULT) && (__ARM_FEATURE_BTI_DEFAULT == 1)
+#   define GNU_PROPERTY_AARCH64_BTI (1 << 0)   // Has BTI
+#   define AARCH64_VALID_CALL_TARGET hint #34  // BTI 'c'
+#   define AARCH64_VALID_JUMP_TARGET hint #38  // BTI 'j'
+#else
+#   define GNU_PROPERTY_AARCH64_BTI 0          // No BTI
+#   define AARCH64_VALID_CALL_TARGET
+#   define AARCH64_VALID_JUMP_TARGET
+#endif
+
+#if defined(__ARM_FEATURE_PAC_DEFAULT)
+#   if ((__ARM_FEATURE_PAC_DEFAULT & (1 << 0)) != 0) // authentication using key A
+#       define AARCH64_SIGN_LINK_REGISTER      paciasp
+#       define AARCH64_VALIDATE_LINK_REGISTER  autiasp
+#   elif ((__ARM_FEATURE_PAC_DEFAULT & (1 << 1)) != 0) // authentication using key B
+#       define AARCH64_SIGN_LINK_REGISTER      pacibsp
+#       define AARCH64_VALIDATE_LINK_REGISTER  autibsp
+#   else
+#       error Pointer authentication defines no valid key!
+#   endif
+#   if ((__ARM_FEATURE_PAC_DEFAULT & (1 << 2)) != 0)
+#       error Authentication of leaf functions is enabled but not supported in FFmpeg!
+#   endif
+#   define GNU_PROPERTY_AARCH64_PAC (1 << 1)
+#else
+#   define GNU_PROPERTY_AARCH64_PAC 0
+#   define AARCH64_SIGN_LINK_REGISTER
+#   define AARCH64_VALIDATE_LINK_REGISTER
+#endif
+
+
+#if (GNU_PROPERTY_AARCH64_BTI != 0 || GNU_PROPERTY_AARCH64_PAC != 0) && defined(__ELF__)
+        .pushsection .note.gnu.property, "a"
+        .balign 8
+        .long 4
+        .long 0x10
+        .long 0x5
+        .asciz "GNU"
+        .long 0xc0000000 /* GNU_PROPERTY_AARCH64_FEATURE_1_AND */
+        .long 4
+        .long (GNU_PROPERTY_AARCH64_BTI | GNU_PROPERTY_AARCH64_PAC)
+        .long 0
+        .popsection
+#endif
+
+.macro  function name, export=0, align=4
+    .macro endfunc
+ELF     .size   \name, . - \name
+FUNC    .endfunc
+        .purgem endfunc
+    .endm
+        .text
+        .align          \align
+    .if \export
+        .global EXTERN_ASM\name
+ELF     .type   EXTERN_ASM\name, %function
+FUNC    .func   EXTERN_ASM\name
+EXTERN_ASM\name:
+        AARCH64_VALID_CALL_TARGET
+    .else
+ELF     .type   \name, %function
+FUNC    .func   \name
+\name:
+    .endif
+.endm
+
+.macro  const   name, align=4, relocate=0
+    .macro endconst
+ELF     .size   \name, . - \name
+        .purgem endconst
+    .endm
+#if HAVE_SECTION_DATA_REL_RO
+.if \relocate
+        .section        .data.rel.ro
+.else
+        .section        .rodata
+.endif
+#elif defined(_WIN32)
+        .section        .rdata
+#elif !defined(__MACH__)
+        .section        .rodata
+#else
+        .const_data
+#endif
+        .align          \align
+\name:
+.endm
+
+.macro  movrel rd, val, offset=0
+#if CONFIG_PIC && defined(__APPLE__)
+    .if \offset < 0
+        adrp            \rd, \val@PAGE
+        add             \rd, \rd, \val@PAGEOFF
+        sub             \rd, \rd, -(\offset)
+    .else
+        adrp            \rd, \val+(\offset)@PAGE
+        add             \rd, \rd, \val+(\offset)@PAGEOFF
+    .endif
+#elif CONFIG_PIC && defined(_WIN32)
+    .if \offset < 0
+        adrp            \rd, \val
+        add             \rd, \rd, :lo12:\val
+        sub             \rd, \rd, -(\offset)
+    .else
+        adrp            \rd, \val+(\offset)
+        add             \rd, \rd, :lo12:\val+(\offset)
+    .endif
+#elif CONFIG_PIC
+#   if __has_feature(hwaddress_sanitizer)
+        adrp            \rd, :pg_hi21_nc:\val+(\offset)
+#   else
+        adrp            \rd, \val+(\offset)
+#   endif
+        add             \rd, \rd, :lo12:\val+(\offset)
+#else
+        ldr             \rd, =\val+\offset
+#endif
+.endm
+
+#define GLUE(a, b) a ## b
+#define JOIN(a, b) GLUE(a, b)
+#define X(s) JOIN(EXTERN_ASM, s)
+
+#define x18 do_not_use_x18
+#define w18 do_not_use_w18

ffmpeg/libavutil/aarch64/cpu.c

@@ -0,0 +1,179 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/cpu.h"
+#include "libavutil/cpu_internal.h"
+#include "config.h"
+
+#if HAVE_GETAUXVAL || HAVE_ELF_AUX_INFO
+#include <stdint.h>
+#include <sys/auxv.h>
+
+#define HWCAP_AARCH64_ASIMDDP (1 << 20)
+#define HWCAP_AARCH64_SVE     (1 << 22)
+#define HWCAP2_AARCH64_SVE2   (1 << 1)
+#define HWCAP2_AARCH64_I8MM   (1 << 13)
+
+static int detect_flags(void)
+{
+    int flags = 0;
+
+    unsigned long hwcap = ff_getauxval(AT_HWCAP);
+    unsigned long hwcap2 = ff_getauxval(AT_HWCAP2);
+
+    if (hwcap & HWCAP_AARCH64_ASIMDDP)
+        flags |= AV_CPU_FLAG_DOTPROD;
+    if (hwcap & HWCAP_AARCH64_SVE)
+        flags |= AV_CPU_FLAG_SVE;
+    if (hwcap2 & HWCAP2_AARCH64_SVE2)
+        flags |= AV_CPU_FLAG_SVE2;
+    if (hwcap2 & HWCAP2_AARCH64_I8MM)
+        flags |= AV_CPU_FLAG_I8MM;
+
+    return flags;
+}
+
+#elif defined(__APPLE__) && HAVE_SYSCTLBYNAME
+#include <sys/sysctl.h>
+
+static int have_feature(const char *feature) {
+    uint32_t value = 0;
+    size_t size = sizeof(value);
+    if (!sysctlbyname(feature, &value, &size, NULL, 0))
+        return value;
+    return 0;
+}
+
+static int detect_flags(void)
+{
+    int flags = 0;
+
+    if (have_feature("hw.optional.arm.FEAT_DotProd"))
+        flags |= AV_CPU_FLAG_DOTPROD;
+    if (have_feature("hw.optional.arm.FEAT_I8MM"))
+        flags |= AV_CPU_FLAG_I8MM;
+
+    return flags;
+}
+
+#elif defined(__OpenBSD__)
+#include <machine/armreg.h>
+#include <machine/cpu.h>
+#include <sys/types.h>
+#include <sys/sysctl.h>
+
+static int detect_flags(void)
+{
+    int flags = 0;
+
+#ifdef CPU_ID_AA64ISAR0
+    int mib[2];
+    uint64_t isar0;
+    uint64_t isar1;
+    size_t len;
+
+    mib[0] = CTL_MACHDEP;
+    mib[1] = CPU_ID_AA64ISAR0;
+    len = sizeof(isar0);
+    if (sysctl(mib, 2, &isar0, &len, NULL, 0) != -1) {
+        if (ID_AA64ISAR0_DP(isar0) >= ID_AA64ISAR0_DP_IMPL)
+            flags |= AV_CPU_FLAG_DOTPROD;
+    }
+
+    mib[0] = CTL_MACHDEP;
+    mib[1] = CPU_ID_AA64ISAR1;
+    len = sizeof(isar1);
+    if (sysctl(mib, 2, &isar1, &len, NULL, 0) != -1) {
+#ifdef ID_AA64ISAR1_I8MM_IMPL
+        if (ID_AA64ISAR1_I8MM(isar1) >= ID_AA64ISAR1_I8MM_IMPL)
+            flags |= AV_CPU_FLAG_I8MM;
+#endif
+    }
+#endif
+
+    return flags;
+}
+
+#elif defined(_WIN32)
+#include <windows.h>
+
+static int detect_flags(void)
+{
+    int flags = 0;
+#ifdef PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE
+    if (IsProcessorFeaturePresent(PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE))
+        flags |= AV_CPU_FLAG_DOTPROD;
+#endif
+#ifdef PF_ARM_SVE_I8MM_INSTRUCTIONS_AVAILABLE
+    /* There's no PF_* flag that indicates whether plain I8MM is available
+     * or not. But if SVE_I8MM is available, that also implies that
+     * regular I8MM is available. */
+    if (IsProcessorFeaturePresent(PF_ARM_SVE_I8MM_INSTRUCTIONS_AVAILABLE))
+        flags |= AV_CPU_FLAG_I8MM;
+#endif
+#ifdef PF_ARM_SVE_INSTRUCTIONS_AVAILABLE
+    if (IsProcessorFeaturePresent(PF_ARM_SVE_INSTRUCTIONS_AVAILABLE))
+        flags |= AV_CPU_FLAG_SVE;
+#endif
+#ifdef PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE
+    if (IsProcessorFeaturePresent(PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE))
+        flags |= AV_CPU_FLAG_SVE2;
+#endif
+    return flags;
+}
+#else
+
+static int detect_flags(void)
+{
+    return 0;
+}
+
+#endif
+
+int ff_get_cpu_flags_aarch64(void)
+{
+    int flags = AV_CPU_FLAG_ARMV8 * HAVE_ARMV8 |
+                AV_CPU_FLAG_NEON  * HAVE_NEON;
+
+#ifdef __ARM_FEATURE_DOTPROD
+    flags |= AV_CPU_FLAG_DOTPROD;
+#endif
+#ifdef __ARM_FEATURE_MATMUL_INT8
+    flags |= AV_CPU_FLAG_I8MM;
+#endif
+#ifdef __ARM_FEATURE_SVE
+    flags |= AV_CPU_FLAG_SVE;
+#endif
+#ifdef __ARM_FEATURE_SVE2
+    flags |= AV_CPU_FLAG_SVE2;
+#endif
+
+    flags |= detect_flags();
+
+    return flags;
+}
+
+size_t ff_get_cpu_max_align_aarch64(void)
+{
+    int flags = av_get_cpu_flags();
+
+    if (flags & AV_CPU_FLAG_NEON)
+        return 16;
+
+    return 8;
+}

ffmpeg/libavutil/aarch64/cpu.h

@@ -0,0 +1,37 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AARCH64_CPU_H
+#define AVUTIL_AARCH64_CPU_H
+
+#include "libavutil/cpu.h"
+#include "libavutil/cpu_internal.h"
+
+#define have_armv8(flags) CPUEXT(flags, ARMV8)
+#define have_neon(flags) CPUEXT(flags, NEON)
+#define have_vfp(flags)  CPUEXT(flags, VFP)
+#define have_dotprod(flags) CPUEXT(flags, DOTPROD)
+#define have_i8mm(flags)    CPUEXT(flags, I8MM)
+#define have_sve(flags)     CPUEXT(flags, SVE)
+#define have_sve2(flags)    CPUEXT(flags, SVE2)
+
+#if HAVE_SVE
+int ff_aarch64_sve_length(void);
+#endif
+
+#endif /* AVUTIL_AARCH64_CPU_H */

ffmpeg/libavutil/aarch64/cpu_sve.S

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2023 Martin Storsjo
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "asm.S"
+
+ENABLE_SVE
+
+function ff_aarch64_sve_length, export=1
+        cntb            x0
+        ret
+endfunc

ffmpeg/libavutil/aarch64/float_dsp_init.c

@@ -0,0 +1,69 @@
+/*
+ * ARM NEON optimised Float DSP functions
+ * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+
+#include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/float_dsp.h"
+#include "cpu.h"
+
+void ff_vector_fmul_neon(float *dst, const float *src0, const float *src1,
+                         int len);
+
+void ff_vector_fmac_scalar_neon(float *dst, const float *src, float mul,
+                                int len);
+
+void ff_vector_fmul_scalar_neon(float *dst, const float *src, float mul,
+                                int len);
+
+void ff_vector_dmul_scalar_neon(double *dst, const double *src, double mul,
+                                int len);
+
+void ff_vector_fmul_window_neon(float *dst, const float *src0,
+                                const float *src1, const float *win, int len);
+
+void ff_vector_fmul_add_neon(float *dst, const float *src0, const float *src1,
+                             const float *src2, int len);
+
+void ff_vector_fmul_reverse_neon(float *dst, const float *src0,
+                                 const float *src1, int len);
+
+void ff_butterflies_float_neon(float *v1, float *v2, int len);
+
+float ff_scalarproduct_float_neon(const float *v1, const float *v2, int len);
+
+av_cold void ff_float_dsp_init_aarch64(AVFloatDSPContext *fdsp)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (have_neon(cpu_flags)) {
+        fdsp->butterflies_float   = ff_butterflies_float_neon;
+        fdsp->scalarproduct_float = ff_scalarproduct_float_neon;
+        fdsp->vector_dmul_scalar  = ff_vector_dmul_scalar_neon;
+        fdsp->vector_fmul         = ff_vector_fmul_neon;
+        fdsp->vector_fmac_scalar  = ff_vector_fmac_scalar_neon;
+        fdsp->vector_fmul_add     = ff_vector_fmul_add_neon;
+        fdsp->vector_fmul_reverse = ff_vector_fmul_reverse_neon;
+        fdsp->vector_fmul_scalar  = ff_vector_fmul_scalar_neon;
+        fdsp->vector_fmul_window  = ff_vector_fmul_window_neon;
+    }
+}

ffmpeg/libavutil/aarch64/float_dsp_neon.S

@@ -0,0 +1,202 @@
+/*
+ * ARM NEON optimised Float DSP functions
+ * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
+ * Copyright (c) 2014 Janne Grunau <janne-libav@jannau.net>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "asm.S"
+
+function ff_vector_fmul_neon, export=1
+1:      subs            w3,  w3,  #16
+        ld1             {v0.4s, v1.4s}, [x1], #32
+        ld1             {v2.4s, v3.4s}, [x1], #32
+        ld1             {v4.4s, v5.4s}, [x2], #32
+        ld1             {v6.4s, v7.4s}, [x2], #32
+        fmul            v16.4s, v0.4s,  v4.4s
+        fmul            v17.4s, v1.4s,  v5.4s
+        fmul            v18.4s, v2.4s,  v6.4s
+        fmul            v19.4s, v3.4s,  v7.4s
+        st1             {v16.4s, v17.4s}, [x0], #32
+        st1             {v18.4s, v19.4s}, [x0], #32
+        b.ne            1b
+        ret
+endfunc
+
+function ff_vector_fmac_scalar_neon, export=1
+        mov             x3,  #-32
+1:      subs            w2,  w2,  #16
+        ld1             {v16.4s, v17.4s}, [x0], #32
+        ld1             {v18.4s, v19.4s}, [x0], x3
+        ld1             {v4.4s,  v5.4s},  [x1], #32
+        ld1             {v6.4s,  v7.4s},  [x1], #32
+        fmla            v16.4s, v4.4s,  v0.s[0]
+        fmla            v17.4s, v5.4s,  v0.s[0]
+        fmla            v18.4s, v6.4s,  v0.s[0]
+        fmla            v19.4s, v7.4s,  v0.s[0]
+        st1             {v16.4s, v17.4s}, [x0], #32
+        st1             {v18.4s, v19.4s}, [x0], #32
+        b.ne            1b
+        ret
+endfunc
+
+function ff_vector_fmul_scalar_neon, export=1
+        mov             w4,  #15
+        bics            w3,  w2,  w4
+        dup             v16.4s, v0.s[0]
+        b.eq            3f
+        ld1             {v0.4s, v1.4s}, [x1], #32
+1:      subs            w3,  w3,  #16
+        fmul            v0.4s,  v0.4s,  v16.4s
+        ld1             {v2.4s, v3.4s}, [x1], #32
+        fmul            v1.4s,  v1.4s,  v16.4s
+        fmul            v2.4s,  v2.4s,  v16.4s
+        st1             {v0.4s, v1.4s}, [x0], #32
+        fmul            v3.4s,  v3.4s,  v16.4s
+        b.eq            2f
+        ld1             {v0.4s, v1.4s}, [x1], #32
+        st1             {v2.4s, v3.4s}, [x0], #32
+        b               1b
+2:      ands            w2,  w2,  #15
+        st1             {v2.4s, v3.4s}, [x0], #32
+        b.eq            4f
+3:      ld1             {v0.4s}, [x1], #16
+        fmul            v0.4s,  v0.4s,  v16.4s
+        st1             {v0.4s}, [x0], #16
+        subs            w2,  w2,  #4
+        b.gt            3b
+4:      ret
+endfunc
+
+function ff_vector_dmul_scalar_neon, export=1
+        dup             v16.2d, v0.d[0]
+        ld1             {v0.2d, v1.2d}, [x1], #32
+1:      subs            w2,  w2,  #8
+        fmul            v0.2d,  v0.2d,  v16.2d
+        ld1             {v2.2d, v3.2d}, [x1], #32
+        fmul            v1.2d,  v1.2d,  v16.2d
+        fmul            v2.2d,  v2.2d,  v16.2d
+        st1             {v0.2d, v1.2d}, [x0], #32
+        fmul            v3.2d,  v3.2d,  v16.2d
+        ld1             {v0.2d, v1.2d}, [x1], #32
+        st1             {v2.2d, v3.2d}, [x0], #32
+        b.gt            1b
+        ret
+endfunc
+
+function ff_vector_fmul_window_neon, export=1
+        sxtw            x4,  w4                 // len
+        sub             x2,  x2,  #8
+        sub             x5,  x4,  #2
+        add             x2,  x2,  x5, lsl #2    // src1 + 4 * (len - 4)
+        add             x6,  x3,  x5, lsl #3    // win  + 8 * (len - 2)
+        add             x5,  x0,  x5, lsl #3    // dst  + 8 * (len - 2)
+        mov             x7,  #-16
+        ld1             {v0.4s},  [x1], #16     // s0
+        ld1             {v2.4s},  [x3], #16     // wi
+        ld1             {v1.4s},  [x2], x7      // s1
+1:      ld1             {v3.4s},  [x6], x7      // wj
+        subs            x4,  x4,  #4
+        fmul            v17.4s, v0.4s,  v2.4s   // s0 * wi
+        rev64           v4.4s,  v1.4s
+        rev64           v5.4s,  v3.4s
+        rev64           v17.4s, v17.4s
+        ext             v4.16b,  v4.16b,  v4.16b,  #8 // s1_r
+        ext             v5.16b,  v5.16b,  v5.16b,  #8 // wj_r
+        ext             v17.16b, v17.16b, v17.16b, #8 // (s0 * wi)_rev
+        fmul            v16.4s, v0.4s,  v5.4s  // s0 * wj_r
+        fmla            v17.4s, v1.4s,  v3.4s  // (s0 * wi)_rev + s1 * wj
+        b.eq            2f
+        ld1             {v0.4s},  [x1], #16
+        fmls            v16.4s, v4.4s,  v2.4s  // s0 * wj_r - s1_r * wi
+        st1             {v17.4s}, [x5], x7
+        ld1             {v2.4s},  [x3], #16
+        ld1             {v1.4s},  [x2], x7
+        st1             {v16.4s}, [x0], #16
+        b               1b
+2:
+        fmls            v16.4s, v4.4s,  v2.4s  // s0 * wj_r - s1_r * wi
+        st1             {v17.4s}, [x5], x7
+        st1             {v16.4s}, [x0], #16
+        ret
+endfunc
+
+function ff_vector_fmul_add_neon, export=1
+        ld1             {v0.4s, v1.4s},  [x1], #32
+        ld1             {v2.4s, v3.4s},  [x2], #32
+        ld1             {v4.4s, v5.4s},  [x3], #32
+1:      subs            w4,  w4,  #8
+        fmla            v4.4s,  v0.4s,  v2.4s
+        fmla            v5.4s,  v1.4s,  v3.4s
+        b.eq            2f
+        ld1             {v0.4s, v1.4s},  [x1], #32
+        ld1             {v2.4s, v3.4s},  [x2], #32
+        st1             {v4.4s, v5.4s},  [x0], #32
+        ld1             {v4.4s, v5.4s},  [x3], #32
+        b               1b
+2:      st1             {v4.4s, v5.4s},  [x0], #32
+        ret
+endfunc
+
+function ff_vector_fmul_reverse_neon, export=1
+        sxtw            x3,  w3
+        add             x2,  x2,  x3,  lsl #2
+        sub             x2,  x2,  #32
+        mov             x4, #-32
+        ld1             {v2.4s, v3.4s},  [x2], x4
+        ld1             {v0.4s, v1.4s},  [x1], #32
+1:      subs            x3,  x3,  #8
+        rev64           v3.4s,  v3.4s
+        rev64           v2.4s,  v2.4s
+        ext             v3.16b, v3.16b, v3.16b,  #8
+        ext             v2.16b, v2.16b, v2.16b,  #8
+        fmul            v16.4s, v0.4s,  v3.4s
+        fmul            v17.4s, v1.4s,  v2.4s
+        b.eq            2f
+        ld1             {v2.4s, v3.4s},  [x2], x4
+        ld1             {v0.4s, v1.4s},  [x1], #32
+        st1             {v16.4s, v17.4s},  [x0], #32
+        b               1b
+2:      st1             {v16.4s, v17.4s},  [x0], #32
+        ret
+endfunc
+
+function ff_butterflies_float_neon, export=1
+1:      ld1             {v0.4s}, [x0]
+        ld1             {v1.4s}, [x1]
+        subs            w2,  w2,  #4
+        fsub            v2.4s,   v0.4s,  v1.4s
+        fadd            v3.4s,   v0.4s,  v1.4s
+        st1             {v2.4s}, [x1],   #16
+        st1             {v3.4s}, [x0],   #16
+        b.gt            1b
+        ret
+endfunc
+
+function ff_scalarproduct_float_neon, export=1
+        movi            v2.4s,  #0
+1:      ld1             {v0.4s}, [x0],   #16
+        ld1             {v1.4s}, [x1],   #16
+        subs            w2,      w2,     #4
+        fmla            v2.4s,   v0.4s,  v1.4s
+        b.gt            1b
+        faddp           v0.4s,   v2.4s,  v2.4s
+        faddp           s0,      v0.2s
+        ret
+endfunc

ffmpeg/libavutil/aarch64/intreadwrite.h

@@ -0,0 +1,42 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AARCH64_INTREADWRITE_H
+#define AVUTIL_AARCH64_INTREADWRITE_H
+
+#if HAVE_INTRINSICS_NEON
+
+#include <arm_neon.h>
+
+#define AV_COPY128 AV_COPY128
+static av_always_inline void AV_COPY128(void *d, const void *s)
+{
+    uint8x16_t tmp = vld1q_u8((const uint8_t *)s);
+    vst1q_u8((uint8_t *)d, tmp);
+}
+
+#define AV_ZERO128 AV_ZERO128
+static av_always_inline void AV_ZERO128(void *d)
+{
+    uint8x16_t zero = vdupq_n_u8(0);
+    vst1q_u8((uint8_t *)d, zero);
+}
+
+#endif /* HAVE_INTRINSICS_NEON */
+
+#endif /* AVUTIL_AARCH64_INTREADWRITE_H */

ffmpeg/libavutil/aarch64/neontest.h

@@ -0,0 +1,70 @@
+/*
+ * check NEON registers for clobbering
+ * Copyright (c) 2008 Ramiro Polla <ramiro.polla@gmail.com>
+ * Copyright (c) 2013 Martin Storsjo
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AARCH64_NEONTEST_H
+#define AVUTIL_AARCH64_NEONTEST_H
+
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+
+#include "libavutil/bswap.h"
+
+#define storeneonregs(mem)                \
+    __asm__ volatile(                     \
+        "stp d8,  d9,  [%0]\n\t"          \
+        "stp d10, d11, [%0, #16]\n\t"     \
+        "stp d12, d13, [%0, #32]\n\t"     \
+        "stp d14, d15, [%0, #48]\n\t"     \
+        :: "r"(mem) : "memory")
+
+#define testneonclobbers(func, ctx, ...)                        \
+    uint64_t neon[2][8];                                        \
+    int ret;                                                    \
+    storeneonregs(neon[0]);                                     \
+    ret = __real_ ## func(ctx, __VA_ARGS__);                    \
+    storeneonregs(neon[1]);                                     \
+    if (memcmp(neon[0], neon[1], sizeof(neon[0]))) {            \
+        int i;                                                  \
+        av_log(ctx, AV_LOG_ERROR,                               \
+               "NEON REGS CLOBBERED IN %s!\n", #func);          \
+        for (i = 0; i < 8; i ++)                                \
+            if (neon[0][i] != neon[1][i]) {                     \
+                av_log(ctx, AV_LOG_ERROR,                       \
+                       "d%-2d = %016"PRIx64"\n",                \
+                       8 + i, av_bswap64(neon[0][i]));          \
+                av_log(ctx, AV_LOG_ERROR,                       \
+                       "   -> %016"PRIx64"\n",                  \
+                       av_bswap64(neon[1][i]));                 \
+            }                                                   \
+        abort();                                                \
+    }                                                           \
+    return ret
+
+#define wrap(func)      \
+int __real_ ## func;    \
+int __wrap_ ## func;    \
+int __wrap_ ## func
+
+#endif /* AVUTIL_AARCH64_NEONTEST_H */

ffmpeg/libavutil/aarch64/timer.h

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2015 Janne Grunau <janne-libav@jannau.net>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AARCH64_TIMER_H
+#define AVUTIL_AARCH64_TIMER_H
+
+#include <stdint.h>
+#include "config.h"
+
+#if HAVE_INLINE_ASM
+
+#define AV_READ_TIME read_time
+
+static inline uint64_t read_time(void)
+{
+    uint64_t cycle_counter;
+    __asm__ volatile(
+        "isb                   \t\n"
+#if defined(__ANDROID__) || defined(__APPLE__)
+        // cntvct_el0 has lower resolution than pmccntr_el0, but is usually
+        // accessible from user space by default.
+        "mrs %0, cntvct_el0        "
+#else
+        // pmccntr_el0 has higher resolution, but is usually not accessible
+        // from user space by default (but access can be enabled with a custom
+        // kernel module).
+        "mrs %0, pmccntr_el0       "
+#endif
+        : "=r"(cycle_counter) :: "memory" );
+
+    return cycle_counter;
+}
+
+#endif /* HAVE_INLINE_ASM */
+
+#endif /* AVUTIL_AARCH64_TIMER_H */

ffmpeg/libavutil/aarch64/tx_float_init.c

@@ -0,0 +1,64 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#define TX_FLOAT
+#include "libavutil/tx_priv.h"
+#include "libavutil/attributes.h"
+#include "libavutil/aarch64/cpu.h"
+
+TX_DECL_FN(fft2,      neon)
+TX_DECL_FN(fft4_fwd,  neon)
+TX_DECL_FN(fft4_inv,  neon)
+TX_DECL_FN(fft8,      neon)
+TX_DECL_FN(fft8_ns,   neon)
+TX_DECL_FN(fft16,     neon)
+TX_DECL_FN(fft16_ns,  neon)
+TX_DECL_FN(fft32,     neon)
+TX_DECL_FN(fft32_ns,  neon)
+TX_DECL_FN(fft_sr,    neon)
+TX_DECL_FN(fft_sr_ns, neon)
+
+static av_cold int neon_init(AVTXContext *s, const FFTXCodelet *cd,
+                             uint64_t flags, FFTXCodeletOptions *opts,
+                             int len, int inv, const void *scale)
+{
+    ff_tx_init_tabs_float(len);
+    if (cd->max_len == 2)
+        return ff_tx_gen_ptwo_revtab(s, opts);
+    else
+        return ff_tx_gen_split_radix_parity_revtab(s, len, inv, opts, 8, 0);
+}
+
+const FFTXCodelet * const ff_tx_codelet_list_float_aarch64[] = {
+    TX_DEF(fft2,      FFT,  2,  2, 2, 0, 128, NULL,      neon, NEON, AV_TX_INPLACE, 0),
+    TX_DEF(fft2,      FFT,  2,  2, 2, 0, 192, neon_init, neon, NEON, AV_TX_INPLACE | FF_TX_PRESHUFFLE, 0),
+    TX_DEF(fft4_fwd,  FFT,  4,  4, 2, 0, 128, NULL,      neon, NEON, AV_TX_INPLACE | FF_TX_FORWARD_ONLY, 0),
+    TX_DEF(fft4_fwd,  FFT,  4,  4, 2, 0, 192, neon_init, neon, NEON, AV_TX_INPLACE | FF_TX_PRESHUFFLE, 0),
+    TX_DEF(fft4_inv,  FFT,  4,  4, 2, 0, 128, NULL,      neon, NEON, AV_TX_INPLACE | FF_TX_INVERSE_ONLY, 0),
+    TX_DEF(fft8,      FFT,  8,  8, 2, 0, 128, neon_init, neon, NEON, AV_TX_INPLACE, 0),
+    TX_DEF(fft8_ns,   FFT,  8,  8, 2, 0, 192, neon_init, neon, NEON, AV_TX_INPLACE | FF_TX_PRESHUFFLE, 0),
+    TX_DEF(fft16,     FFT, 16, 16, 2, 0, 128, neon_init, neon, NEON, AV_TX_INPLACE, 0),
+    TX_DEF(fft16_ns,  FFT, 16, 16, 2, 0, 192, neon_init, neon, NEON, AV_TX_INPLACE | FF_TX_PRESHUFFLE, 0),
+    TX_DEF(fft32,     FFT, 32, 32, 2, 0, 128, neon_init, neon, NEON, AV_TX_INPLACE, 0),
+    TX_DEF(fft32_ns,  FFT, 32, 32, 2, 0, 192, neon_init, neon, NEON, AV_TX_INPLACE | FF_TX_PRESHUFFLE, 0),
+
+    TX_DEF(fft_sr,    FFT, 64, 131072, 2, 0, 128, neon_init, neon, NEON, 0, 0),
+    TX_DEF(fft_sr_ns, FFT, 64, 131072, 2, 0, 192, neon_init, neon, NEON, AV_TX_INPLACE | FF_TX_PRESHUFFLE, 0),
+
+    NULL,
+};

ffmpeg/libavutil/adler32.c

@@ -0,0 +1,96 @@
+/*
+ * Compute the Adler-32 checksum of a data stream.
+ * This is a modified version based on adler32.c from the zlib library.
+ *
+ * Copyright (C) 1995 Mark Adler
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty.  In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ */
+
+/**
+ * @file
+ * Computes the Adler-32 checksum of a data stream
+ *
+ * This is a modified version based on adler32.c from the zlib library.
+ * @author Mark Adler
+ * @ingroup lavu_adler32
+ */
+
+#include "config.h"
+#include "adler32.h"
+#include "intreadwrite.h"
+#include "macros.h"
+
+#define BASE 65521L /* largest prime smaller than 65536 */
+
+#define DO1(buf)  { s1 += *buf++; s2 += s1; }
+#define DO4(buf)  DO1(buf); DO1(buf); DO1(buf); DO1(buf);
+#define DO16(buf) DO4(buf); DO4(buf); DO4(buf); DO4(buf);
+
+AVAdler av_adler32_update(AVAdler adler, const uint8_t *buf, size_t len)
+{
+    unsigned long s1 = adler & 0xffff;
+    unsigned long s2 = adler >> 16;
+
+    while (len > 0) {
+#if HAVE_FAST_64BIT && HAVE_FAST_UNALIGNED && !CONFIG_SMALL
+        unsigned len2 = FFMIN((len-1) & ~7, 23*8);
+        if (len2) {
+            uint64_t a1= 0;
+            uint64_t a2= 0;
+            uint64_t b1= 0;
+            uint64_t b2= 0;
+            len -= len2;
+            s2 += s1*len2;
+            while (len2 >= 8) {
+                uint64_t v = AV_RN64(buf);
+                a2 += a1;
+                b2 += b1;
+                a1 +=  v    &0x00FF00FF00FF00FF;
+                b1 += (v>>8)&0x00FF00FF00FF00FF;
+                len2 -= 8;
+                buf+=8;
+            }
+
+            //We combine the 8 interleaved adler32 checksums without overflows
+            //Decreasing the number of iterations would allow below code to be
+            //simplified but would likely be slower due to the fewer iterations
+            //of the inner loop
+            s1 += ((a1+b1)*0x1000100010001)>>48;
+            s2 += ((((a2&0xFFFF0000FFFF)+(b2&0xFFFF0000FFFF)+((a2>>16)&0xFFFF0000FFFF)+((b2>>16)&0xFFFF0000FFFF))*0x800000008)>>32)
+#if HAVE_BIGENDIAN
+                 + 2*((b1*0x1000200030004)>>48)
+                 +   ((a1*0x1000100010001)>>48)
+                 + 2*((a1*0x0000100020003)>>48);
+#else
+                 + 2*((a1*0x4000300020001)>>48)
+                 +   ((b1*0x1000100010001)>>48)
+                 + 2*((b1*0x3000200010000)>>48);
+#endif
+        }
+#else
+        while (len > 4  && s2 < (1U << 31)) {
+            DO4(buf);
+            len -= 4;
+        }
+#endif
+        DO1(buf); len--;
+        s1 %= BASE;
+        s2 %= BASE;
+    }
+    return (s2 << 16) | s1;
+}

ffmpeg/libavutil/adler32.h

@@ -0,0 +1,63 @@
+/*
+ * copyright (c) 2006 Mans Rullgard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_adler32
+ * Public header for Adler-32 hash function implementation.
+ */
+
+#ifndef AVUTIL_ADLER32_H
+#define AVUTIL_ADLER32_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include "attributes.h"
+
+/**
+ * @defgroup lavu_adler32 Adler-32
+ * @ingroup lavu_hash
+ * Adler-32 hash function implementation.
+ *
+ * @{
+ */
+
+typedef uint32_t AVAdler;
+
+/**
+ * Calculate the Adler32 checksum of a buffer.
+ *
+ * Passing the return value to a subsequent av_adler32_update() call
+ * allows the checksum of multiple buffers to be calculated as though
+ * they were concatenated.
+ *
+ * @param adler initial checksum value
+ * @param buf   pointer to input buffer
+ * @param len   size of input buffer
+ * @return      updated checksum
+ */
+AVAdler av_adler32_update(AVAdler adler, const uint8_t *buf,
+                          size_t len) av_pure;
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_ADLER32_H */

ffmpeg/libavutil/aes.c

@@ -0,0 +1,283 @@
+/*
+ * copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * some optimization ideas from aes128.c by Reimar Doeffinger
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+
+#include "config.h"
+#include "aes.h"
+#include "aes_internal.h"
+#include "attributes.h"
+#include "error.h"
+#include "intreadwrite.h"
+#include "macros.h"
+#include "mem.h"
+#include "thread.h"
+
+const int av_aes_size= sizeof(AVAES);
+
+struct AVAES *av_aes_alloc(void)
+{
+    return av_mallocz(sizeof(struct AVAES));
+}
+
+static const uint8_t rcon[10] = {
+    0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36
+};
+
+static uint8_t     sbox[256];
+static uint8_t inv_sbox[256];
+#if CONFIG_SMALL
+static uint32_t enc_multbl[1][256];
+static uint32_t dec_multbl[1][256];
+#else
+static uint32_t enc_multbl[4][256];
+static uint32_t dec_multbl[4][256];
+#endif
+
+#if HAVE_BIGENDIAN
+#   define ROT(x, s) (((x) >> (s)) | ((x) << (32-(s))))
+#else
+#   define ROT(x, s) (((x) << (s)) | ((x) >> (32-(s))))
+#endif
+
+static inline void addkey(av_aes_block *dst, const av_aes_block *src,
+                          const av_aes_block *round_key)
+{
+    dst->u64[0] = src->u64[0] ^ round_key->u64[0];
+    dst->u64[1] = src->u64[1] ^ round_key->u64[1];
+}
+
+static inline void addkey_s(av_aes_block *dst, const uint8_t *src,
+                            const av_aes_block *round_key)
+{
+    dst->u64[0] = AV_RN64(src)     ^ round_key->u64[0];
+    dst->u64[1] = AV_RN64(src + 8) ^ round_key->u64[1];
+}
+
+static inline void addkey_d(uint8_t *dst, const av_aes_block *src,
+                            const av_aes_block *round_key)
+{
+    AV_WN64(dst,     src->u64[0] ^ round_key->u64[0]);
+    AV_WN64(dst + 8, src->u64[1] ^ round_key->u64[1]);
+}
+
+static void subshift(av_aes_block s0[2], int s, const uint8_t *box)
+{
+    unsigned char *s1_dst = (unsigned char*)s0[0].u8 + 3 - s;
+    const unsigned char *s1_src = s1_dst + sizeof(*s0);
+    unsigned char *s3_dst = (unsigned char*)s0[0].u8 + s + 1;
+    const unsigned char *s3_src = s3_dst + sizeof(*s0);
+
+    s0[0].u8[ 0] = box[s0[1].u8[ 0]];
+    s0[0].u8[ 4] = box[s0[1].u8[ 4]];
+    s0[0].u8[ 8] = box[s0[1].u8[ 8]];
+    s0[0].u8[12] = box[s0[1].u8[12]];
+    s1_dst[ 0] = box[s1_src[ 4]];
+    s1_dst[ 4] = box[s1_src[ 8]];
+    s1_dst[ 8] = box[s1_src[12]];
+    s1_dst[12] = box[s1_src[ 0]];
+    s0[0].u8[ 2] = box[s0[1].u8[10]];
+    s0[0].u8[10] = box[s0[1].u8[ 2]];
+    s0[0].u8[ 6] = box[s0[1].u8[14]];
+    s0[0].u8[14] = box[s0[1].u8[ 6]];
+    s3_dst[ 0] = box[s3_src[12]];
+    s3_dst[12] = box[s3_src[ 8]];
+    s3_dst[ 8] = box[s3_src[ 4]];
+    s3_dst[ 4] = box[s3_src[ 0]];
+}
+
+static inline int mix_core(uint32_t multbl[][256], int a, int b, int c, int d)
+{
+#if CONFIG_SMALL
+    return multbl[0][a] ^ ROT(multbl[0][b], 8) ^ ROT(multbl[0][c], 16) ^ ROT(multbl[0][d], 24);
+#else
+    return multbl[0][a] ^ multbl[1][b] ^ multbl[2][c] ^ multbl[3][d];
+#endif
+}
+
+static inline void mix(av_aes_block state[2], uint32_t multbl[][256], int s1, int s3)
+{
+    uint8_t (*src)[4] = state[1].u8x4;
+    state[0].u32[0] = mix_core(multbl, src[0][0], src[s1    ][1], src[2][2], src[s3    ][3]);
+    state[0].u32[1] = mix_core(multbl, src[1][0], src[s3 - 1][1], src[3][2], src[s1 - 1][3]);
+    state[0].u32[2] = mix_core(multbl, src[2][0], src[s3    ][1], src[0][2], src[s1    ][3]);
+    state[0].u32[3] = mix_core(multbl, src[3][0], src[s1 - 1][1], src[1][2], src[s3 - 1][3]);
+}
+
+static inline void aes_crypt(AVAES *a, int s, const uint8_t *sbox,
+                         uint32_t multbl[][256])
+{
+    int r;
+
+    for (r = a->rounds - 1; r > 0; r--) {
+        mix(a->state, multbl, 3 - s, 1 + s);
+        addkey(&a->state[1], &a->state[0], &a->round_key[r]);
+    }
+
+    subshift(&a->state[0], s, sbox);
+}
+
+static void aes_encrypt(AVAES *a, uint8_t *dst, const uint8_t *src,
+                        int count, uint8_t *iv, int rounds)
+{
+    while (count--) {
+        addkey_s(&a->state[1], src, &a->round_key[rounds]);
+        if (iv)
+            addkey_s(&a->state[1], iv, &a->state[1]);
+        aes_crypt(a, 2, sbox, enc_multbl);
+        addkey_d(dst, &a->state[0], &a->round_key[0]);
+        if (iv)
+            memcpy(iv, dst, 16);
+        src += 16;
+        dst += 16;
+    }
+}
+
+static void aes_decrypt(AVAES *a, uint8_t *dst, const uint8_t *src,
+                        int count, uint8_t *iv, int rounds)
+{
+    while (count--) {
+        addkey_s(&a->state[1], src, &a->round_key[rounds]);
+        aes_crypt(a, 0, inv_sbox, dec_multbl);
+        if (iv) {
+            addkey_s(&a->state[0], iv, &a->state[0]);
+            memcpy(iv, src, 16);
+        }
+        addkey_d(dst, &a->state[0], &a->round_key[0]);
+        src += 16;
+        dst += 16;
+    }
+}
+
+void av_aes_crypt(AVAES *a, uint8_t *dst, const uint8_t *src,
+                  int count, uint8_t *iv, int decrypt)
+{
+    a->crypt(a, dst, src, count, iv, a->rounds);
+}
+
+static void init_multbl2(uint32_t tbl[][256], const int c[4],
+                         const uint8_t *log8, const uint8_t *alog8,
+                         const uint8_t *sbox)
+{
+    int i;
+
+    for (i = 0; i < 256; i++) {
+        int x = sbox[i];
+        if (x) {
+            int k, l, m, n;
+            x = log8[x];
+            k = alog8[x + log8[c[0]]];
+            l = alog8[x + log8[c[1]]];
+            m = alog8[x + log8[c[2]]];
+            n = alog8[x + log8[c[3]]];
+            tbl[0][i] = AV_NE(MKBETAG(k, l, m, n), MKTAG(k, l, m, n));
+#if !CONFIG_SMALL
+            tbl[1][i] = ROT(tbl[0][i], 8);
+            tbl[2][i] = ROT(tbl[0][i], 16);
+            tbl[3][i] = ROT(tbl[0][i], 24);
+#endif
+        }
+    }
+}
+
+static AVOnce aes_static_init = AV_ONCE_INIT;
+
+static av_cold void aes_init_static(void)
+{
+    uint8_t log8[256];
+    uint8_t alog8[512];
+    int i, j = 1;
+
+    for (i = 0; i < 255; i++) {
+        alog8[i] = alog8[i + 255] = j;
+        log8[j] = i;
+        j ^= j + j;
+        if (j > 255)
+            j ^= 0x11B;
+    }
+    for (i = 0; i < 256; i++) {
+        j = i ? alog8[255 - log8[i]] : 0;
+        j ^= (j << 1) ^ (j << 2) ^ (j << 3) ^ (j << 4);
+        j = (j ^ (j >> 8) ^ 99) & 255;
+        inv_sbox[j] = i;
+        sbox[i]     = j;
+    }
+    init_multbl2(dec_multbl, (const int[4]) { 0xe, 0x9, 0xd, 0xb },
+                 log8, alog8, inv_sbox);
+    init_multbl2(enc_multbl, (const int[4]) { 0x2, 0x1, 0x1, 0x3 },
+                 log8, alog8, sbox);
+}
+
+// this is based on the reference AES code by Paulo Barreto and Vincent Rijmen
+int av_aes_init(AVAES *a, const uint8_t *key, int key_bits, int decrypt)
+{
+    int i, j, t, rconpointer = 0;
+    uint8_t tk[8][4];
+    int KC = key_bits >> 5;
+    int rounds = KC + 6;
+
+    a->rounds = rounds;
+    a->crypt = decrypt ? aes_decrypt : aes_encrypt;
+#if ARCH_X86
+    ff_init_aes_x86(a, decrypt);
+#endif
+
+    ff_thread_once(&aes_static_init, aes_init_static);
+
+    if (key_bits != 128 && key_bits != 192 && key_bits != 256)
+        return AVERROR(EINVAL);
+
+    memcpy(tk, key, KC * 4);
+    memcpy(a->round_key[0].u8, key, KC * 4);
+
+    for (t = KC * 4; t < (rounds + 1) * 16; t += KC * 4) {
+        for (i = 0; i < 4; i++)
+            tk[0][i] ^= sbox[tk[KC - 1][(i + 1) & 3]];
+        tk[0][0] ^= rcon[rconpointer++];
+
+        for (j = 1; j < KC; j++) {
+            if (KC != 8 || j != KC >> 1)
+                for (i = 0; i < 4; i++)
+                    tk[j][i] ^= tk[j - 1][i];
+            else
+                for (i = 0; i < 4; i++)
+                    tk[j][i] ^= sbox[tk[j - 1][i]];
+        }
+
+        memcpy((unsigned char*)a->round_key + t, tk, KC * 4);
+    }
+
+    if (decrypt) {
+        for (i = 1; i < rounds; i++) {
+            av_aes_block tmp[3];
+            tmp[2] = a->round_key[i];
+            subshift(&tmp[1], 0, sbox);
+            mix(tmp, dec_multbl, 1, 3);
+            a->round_key[i] = tmp[0];
+        }
+    } else {
+        for (i = 0; i < (rounds + 1) >> 1; i++)
+            FFSWAP(av_aes_block, a->round_key[i], a->round_key[rounds - i]);
+    }
+
+    return 0;
+}

ffmpeg/libavutil/aes.h

@@ -0,0 +1,69 @@
+/*
+ * copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AES_H
+#define AVUTIL_AES_H
+
+#include <stdint.h>
+
+#include "attributes.h"
+
+/**
+ * @defgroup lavu_aes AES
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+extern const int av_aes_size;
+
+struct AVAES;
+
+/**
+ * Allocate an AVAES context.
+ */
+struct AVAES *av_aes_alloc(void);
+
+/**
+ * Initialize an AVAES context.
+ *
+ * @param a The AVAES context
+ * @param key Pointer to the key
+ * @param key_bits 128, 192 or 256
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt);
+
+/**
+ * Encrypt or decrypt a buffer using a previously initialized context.
+ *
+ * @param a The AVAES context
+ * @param dst destination array, can be equal to src
+ * @param src source array, can be equal to dst
+ * @param count number of 16 byte blocks
+ * @param iv initialization vector for CBC mode, if NULL then ECB will be used
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_AES_H */

ffmpeg/libavutil/aes_ctr.c

@@ -0,0 +1,120 @@
+/*
+ * AES-CTR cipher
+ * Copyright (c) 2015 Eran Kornblau <erankor at gmail dot com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+
+#include "aes_ctr.h"
+#include "aes.h"
+#include "aes_internal.h"
+#include "intreadwrite.h"
+#include "macros.h"
+#include "mem.h"
+#include "random_seed.h"
+
+#define AES_BLOCK_SIZE (16)
+
+typedef struct AVAESCTR {
+    DECLARE_ALIGNED(8, uint8_t, counter)[AES_BLOCK_SIZE];
+    DECLARE_ALIGNED(8, uint8_t, encrypted_counter)[AES_BLOCK_SIZE];
+    AVAES aes;
+} AVAESCTR;
+
+struct AVAESCTR *av_aes_ctr_alloc(void)
+{
+    return av_mallocz(sizeof(struct AVAESCTR));
+}
+
+void av_aes_ctr_set_iv(struct AVAESCTR *a, const uint8_t* iv)
+{
+    memcpy(a->counter, iv, AES_CTR_IV_SIZE);
+    memset(a->counter + AES_CTR_IV_SIZE, 0, sizeof(a->counter) - AES_CTR_IV_SIZE);
+}
+
+void av_aes_ctr_set_full_iv(struct AVAESCTR *a, const uint8_t* iv)
+{
+    memcpy(a->counter, iv, sizeof(a->counter));
+}
+
+const uint8_t* av_aes_ctr_get_iv(struct AVAESCTR *a)
+{
+    return a->counter;
+}
+
+void av_aes_ctr_set_random_iv(struct AVAESCTR *a)
+{
+    uint32_t iv[2];
+
+    iv[0] = av_get_random_seed();
+    iv[1] = av_get_random_seed();
+
+    av_aes_ctr_set_iv(a, (uint8_t*)iv);
+}
+
+int av_aes_ctr_init(struct AVAESCTR *a, const uint8_t *key)
+{
+    av_aes_init(&a->aes, key, 128, 0);
+
+    memset(a->counter, 0, sizeof(a->counter));
+
+    return 0;
+}
+
+void av_aes_ctr_free(struct AVAESCTR *a)
+{
+    av_free(a);
+}
+
+static inline void av_aes_ctr_increment_be64(uint8_t* counter)
+{
+    uint64_t c = AV_RB64A(counter) + 1;
+    AV_WB64A(counter, c);
+}
+
+void av_aes_ctr_increment_iv(struct AVAESCTR *a)
+{
+    av_aes_ctr_increment_be64(a->counter);
+    memset(a->counter + AES_CTR_IV_SIZE, 0, sizeof(a->counter) - AES_CTR_IV_SIZE);
+}
+
+void av_aes_ctr_crypt(struct AVAESCTR *a, uint8_t *dst, const uint8_t *src, int count)
+{
+    while (count >= AES_BLOCK_SIZE) {
+        av_aes_crypt(&a->aes, a->encrypted_counter, a->counter, 1, NULL, 0);
+        av_aes_ctr_increment_be64(a->counter + 8);
+#if HAVE_FAST_64BIT
+        for (int len = 0; len < AES_BLOCK_SIZE; len += 8)
+            AV_WN64(&dst[len], AV_RN64(&src[len]) ^ AV_RN64A(&a->encrypted_counter[len]));
+#else
+        for (int len = 0; len < AES_BLOCK_SIZE; len += 4)
+            AV_WN32(&dst[len], AV_RN32(&src[len]) ^ AV_RN32A(&a->encrypted_counter[len]));
+#endif
+        dst += AES_BLOCK_SIZE;
+        src += AES_BLOCK_SIZE;
+        count -= AES_BLOCK_SIZE;
+    }
+
+    if (count > 0) {
+        av_aes_crypt(&a->aes, a->encrypted_counter, a->counter, 1, NULL, 0);
+        av_aes_ctr_increment_be64(a->counter + 8);
+        for (int len = 0; len < count; len++)
+            dst[len] = src[len] ^ a->encrypted_counter[len];
+    }
+}

ffmpeg/libavutil/aes_ctr.h

@@ -0,0 +1,99 @@
+/*
+ * AES-CTR cipher
+ * Copyright (c) 2015 Eran Kornblau <erankor at gmail dot com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AES_CTR_H
+#define AVUTIL_AES_CTR_H
+
+/**
+ * @defgroup lavu_aes_ctr AES-CTR
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+#include <stdint.h>
+
+#include "attributes.h"
+
+#define AES_CTR_KEY_SIZE (16)
+#define AES_CTR_IV_SIZE (8)
+
+struct AVAESCTR;
+
+/**
+ * Allocate an AVAESCTR context.
+ */
+struct AVAESCTR *av_aes_ctr_alloc(void);
+
+/**
+ * Initialize an AVAESCTR context.
+ *
+ * @param a The AVAESCTR context to initialize
+ * @param key encryption key, must have a length of AES_CTR_KEY_SIZE
+ */
+int av_aes_ctr_init(struct AVAESCTR *a, const uint8_t *key);
+
+/**
+ * Release an AVAESCTR context.
+ *
+ * @param a The AVAESCTR context
+ */
+void av_aes_ctr_free(struct AVAESCTR *a);
+
+/**
+ * Process a buffer using a previously initialized context.
+ *
+ * @param a The AVAESCTR context
+ * @param dst destination array, can be equal to src
+ * @param src source array, can be equal to dst
+ * @param size the size of src and dst
+ */
+void av_aes_ctr_crypt(struct AVAESCTR *a, uint8_t *dst, const uint8_t *src, int size);
+
+/**
+ * Get the current iv
+ */
+const uint8_t* av_aes_ctr_get_iv(struct AVAESCTR *a);
+
+/**
+ * Generate a random iv
+ */
+void av_aes_ctr_set_random_iv(struct AVAESCTR *a);
+
+/**
+ * Forcefully change the 8-byte iv
+ */
+void av_aes_ctr_set_iv(struct AVAESCTR *a, const uint8_t* iv);
+
+/**
+ * Forcefully change the "full" 16-byte iv, including the counter
+ */
+void av_aes_ctr_set_full_iv(struct AVAESCTR *a, const uint8_t* iv);
+
+/**
+ * Increment the top 64 bit of the iv (performed after each frame)
+ */
+void av_aes_ctr_increment_iv(struct AVAESCTR *a);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_AES_CTR_H */

ffmpeg/libavutil/aes_internal.h

@@ -0,0 +1,45 @@
+/*
+ * copyright (c) 2015 rcombs
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AES_INTERNAL_H
+#define AVUTIL_AES_INTERNAL_H
+
+#include "mem_internal.h"
+#include <stdint.h>
+
+typedef union {
+    uint64_t u64[2];
+    uint32_t u32[4];
+    uint8_t u8x4[4][4];
+    uint8_t u8[16];
+} av_aes_block;
+
+typedef struct AVAES {
+    // Note: round_key[16] is accessed in the init code, but this only
+    // overwrites state, which does not matter (see also commit ba554c0).
+    DECLARE_ALIGNED(16, av_aes_block, round_key)[15];
+    DECLARE_ALIGNED(16, av_aes_block, state)[2];
+    int rounds;
+    void (*crypt)(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int rounds);
+} AVAES;
+
+void ff_init_aes_x86(AVAES *a, int decrypt);
+
+#endif /* AVUTIL_AES_INTERNAL_H */

ffmpeg/libavutil/ambient_viewing_environment.c

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2023 Jan Ekström <jeebjp@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "ambient_viewing_environment.h"
+#include "mem.h"
+
+static void get_defaults(AVAmbientViewingEnvironment *env)
+{
+    env->ambient_illuminance =
+    env->ambient_light_x     =
+    env->ambient_light_y     = (AVRational) { 0, 1 };
+}
+
+AVAmbientViewingEnvironment *av_ambient_viewing_environment_alloc(size_t *size)
+{
+    AVAmbientViewingEnvironment *env =
+        av_mallocz(sizeof(AVAmbientViewingEnvironment));
+    if (!env)
+        return NULL;
+
+    get_defaults(env);
+
+     if (size)
+        *size = sizeof(*env);
+
+    return env;
+}
+
+AVAmbientViewingEnvironment *av_ambient_viewing_environment_create_side_data(AVFrame *frame)
+{
+    AVFrameSideData *side_data =
+        av_frame_new_side_data(frame,
+                               AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT,
+                               sizeof(AVAmbientViewingEnvironment));
+    if (!side_data)
+        return NULL;
+
+    memset(side_data->data, 0, side_data->size);
+    get_defaults((AVAmbientViewingEnvironment *)side_data->data);
+
+    return (AVAmbientViewingEnvironment *)side_data->data;
+}

ffmpeg/libavutil/ambient_viewing_environment.h

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2023 Jan Ekström <jeebjp@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H
+#define AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H
+
+#include <stddef.h>
+#include "frame.h"
+#include "rational.h"
+
+/**
+ * Ambient viewing environment metadata as defined by H.274. The values are
+ * saved in AVRationals so that they keep their exactness, while allowing for
+ * easy access to a double value with f.ex. av_q2d.
+ *
+ * @note sizeof(AVAmbientViewingEnvironment) is not part of the public ABI, and
+ *       it must be allocated using av_ambient_viewing_environment_alloc.
+ */
+typedef struct AVAmbientViewingEnvironment {
+    /**
+     * Environmental illuminance of the ambient viewing environment in lux.
+     */
+    AVRational ambient_illuminance;
+
+    /**
+     * Normalized x chromaticity coordinate of the environmental ambient light
+     * in the nominal viewing environment according to the CIE 1931 definition
+     * of x and y as specified in ISO/CIE 11664-1.
+     */
+    AVRational ambient_light_x;
+
+    /**
+     * Normalized y chromaticity coordinate of the environmental ambient light
+     * in the nominal viewing environment according to the CIE 1931 definition
+     * of x and y as specified in ISO/CIE 11664-1.
+     */
+    AVRational ambient_light_y;
+} AVAmbientViewingEnvironment;
+
+/**
+ * Allocate an AVAmbientViewingEnvironment structure.
+ *
+ * @return the newly allocated struct or NULL on failure
+ */
+AVAmbientViewingEnvironment *av_ambient_viewing_environment_alloc(size_t *size);
+
+/**
+ * Allocate and add an AVAmbientViewingEnvironment structure to an existing
+ * AVFrame as side data.
+ *
+ * @return the newly allocated struct, or NULL on failure
+ */
+AVAmbientViewingEnvironment *av_ambient_viewing_environment_create_side_data(AVFrame *frame);
+
+#endif /* AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H */

ffmpeg/libavutil/arm/Makefile

@@ -0,0 +1,8 @@
+OBJS += arm/cpu.o                                                       \
+        arm/float_dsp_init_arm.o                                        \
+
+VFP-OBJS += arm/float_dsp_init_vfp.o                                    \
+            arm/float_dsp_vfp.o                                         \
+
+NEON-OBJS += arm/float_dsp_init_neon.o                                  \
+             arm/float_dsp_neon.o                                       \

ffmpeg/libavutil/arm/asm.S

@@ -0,0 +1,367 @@
+/*
+ * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#ifdef __ELF__
+#   define ELF
+#else
+#   define ELF @
+#endif
+
+#if CONFIG_THUMB
+#   define A @
+#   define T
+#else
+#   define A
+#   define T @
+#endif
+
+#if HAVE_AS_FUNC
+#   define FUNC
+#else
+#   define FUNC @
+#endif
+
+#if HAVE_AS_FPU_DIRECTIVE
+#   define FPU
+#else
+#   define FPU @
+#endif
+
+#if CONFIG_THUMB && defined(__APPLE__)
+#   define TFUNC
+#else
+#   define TFUNC @
+#endif
+
+#if HAVE_AS_ARCH_DIRECTIVE
+#if   HAVE_NEON
+        .arch           armv7-a
+#elif HAVE_ARMV6T2
+        .arch           armv6t2
+#elif HAVE_ARMV6
+        .arch           armv6
+#elif HAVE_ARMV5TE
+        .arch           armv5te
+#endif
+#endif
+#if   HAVE_AS_OBJECT_ARCH
+ELF     .object_arch    armv4
+#endif
+
+#if   HAVE_NEON
+FPU     .fpu            neon
+ELF     .eabi_attribute 10, 0           @ suppress Tag_FP_arch
+ELF     .eabi_attribute 12, 0           @ suppress Tag_Advanced_SIMD_arch
+#elif HAVE_VFP
+FPU     .fpu            vfp
+ELF     .eabi_attribute 10, 0           @ suppress Tag_FP_arch
+#endif
+
+        .syntax unified
+T       .thumb
+ELF     .eabi_attribute 25, 1           @ Tag_ABI_align_preserved
+ELF     .section .note.GNU-stack,"",%progbits @ Mark stack as non-executable
+
+.macro  function name, export=0, align=2
+        .set            .Lpic_idx, 0
+        .set            .Lpic_gp, 0
+    .macro endfunc
+      .if .Lpic_idx
+        .align          2
+        .altmacro
+        put_pic         %(.Lpic_idx - 1)
+        .noaltmacro
+      .endif
+      .if .Lpic_gp
+        .unreq          gp
+      .endif
+ELF     .size   \name, . - \name
+FUNC    .endfunc
+        .purgem endfunc
+    .endm
+        .text
+        .align          \align
+    .if \export
+        .global EXTERN_ASM\name
+ELF     .type   EXTERN_ASM\name, %function
+FUNC    .func   EXTERN_ASM\name
+TFUNC   .thumb_func EXTERN_ASM\name
+EXTERN_ASM\name:
+    .else
+ELF     .type   \name, %function
+FUNC    .func   \name
+TFUNC   .thumb_func \name
+\name:
+    .endif
+.endm
+
+.macro  const   name, align=2, relocate=0
+    .macro endconst
+ELF     .size   \name, . - \name
+        .purgem endconst
+    .endm
+#if HAVE_SECTION_DATA_REL_RO
+.if \relocate
+        .section        .data.rel.ro
+.else
+        .section        .rodata
+.endif
+#elif defined(_WIN32)
+        .section        .rdata
+#elif !defined(__MACH__)
+        .section        .rodata
+#else
+        .const_data
+#endif
+        .align          \align
+\name:
+.endm
+
+#if !HAVE_ARMV6T2_EXTERNAL
+.macro  movw    rd, val
+        mov     \rd, \val &  255
+        orr     \rd, \val & ~255
+.endm
+#endif
+
+.macro  mov32   rd, val
+#if HAVE_ARMV6T2_EXTERNAL
+        movw            \rd, #(\val) & 0xffff
+    .if (\val) >> 16
+        movt            \rd, #(\val) >> 16
+    .endif
+#else
+        ldr             \rd, =\val
+#endif
+.endm
+
+.macro  put_pic         num
+        put_pic_\num
+.endm
+
+.macro  do_def_pic      num, val, label
+    .macro put_pic_\num
+      .if \num
+        .altmacro
+        put_pic         %(\num - 1)
+        .noaltmacro
+      .endif
+\label: .word           \val
+        .purgem         put_pic_\num
+    .endm
+.endm
+
+.macro  def_pic         val, label
+        .altmacro
+        do_def_pic      %.Lpic_idx, \val, \label
+        .noaltmacro
+        .set            .Lpic_idx, .Lpic_idx + 1
+.endm
+
+.macro  ldpic           rd,  val, indir=0
+        ldr             \rd, .Lpicoff\@
+.Lpic\@:
+    .if \indir
+A       ldr             \rd, [pc, \rd]
+T       add             \rd, pc
+T       ldr             \rd, [\rd]
+    .else
+        add             \rd, pc
+    .endif
+        def_pic         \val - (.Lpic\@ + (8 >> CONFIG_THUMB)), .Lpicoff\@
+.endm
+
+.macro  movrel rd, val
+#if CONFIG_PIC
+        ldpic           \rd, \val
+#elif HAVE_ARMV6T2_EXTERNAL && !defined(__APPLE__)
+        movw            \rd, #:lower16:\val
+        movt            \rd, #:upper16:\val
+#else
+        ldr             \rd, =\val
+#endif
+.endm
+
+.macro  movrelx         rd,  val, gp
+    .ifc \rd,\gp
+        .error      "movrelx needs two distinct registers"
+    .endif
+    .ifc \rd\()_\gp,r12_
+        .warning    "movrelx rd=\rd without explicit set gp"
+    .endif
+    .ifc \rd\()_\gp,ip_
+        .warning    "movrelx rd=\rd without explicit set gp"
+    .endif
+#if CONFIG_PIC && defined(__ELF__)
+    .ifnb \gp
+      .if .Lpic_gp
+        .unreq          gp
+      .endif
+        gp      .req    \gp
+        ldpic           gp,  _GLOBAL_OFFSET_TABLE_
+    .elseif !.Lpic_gp
+        gp      .req    r12
+        ldpic           gp,  _GLOBAL_OFFSET_TABLE_
+    .endif
+        .set            .Lpic_gp, 1
+        ldr             \rd, .Lpicoff\@
+        ldr             \rd, [gp, \rd]
+        def_pic         \val(GOT), .Lpicoff\@
+#elif CONFIG_PIC && defined(__APPLE__)
+        ldpic           \rd, .Lpic\@, indir=1
+        .non_lazy_symbol_pointer
+.Lpic\@:
+        .indirect_symbol \val
+        .word           0
+        .text
+#else
+        movrel          \rd, \val
+#endif
+.endm
+
+.macro  add_sh          rd,  rn,  rm,  sh:vararg
+A       add             \rd, \rn, \rm, \sh
+T       mov             \rm, \rm, \sh
+T       add             \rd, \rn, \rm
+.endm
+
+.macro  ldr_pre         rt,  rn,  rm:vararg
+A       ldr             \rt, [\rn, \rm]!
+T       add             \rn, \rn, \rm
+T       ldr             \rt, [\rn]
+.endm
+
+.macro  ldr_dpre        rt,  rn,  rm:vararg
+A       ldr             \rt, [\rn, -\rm]!
+T       sub             \rn, \rn, \rm
+T       ldr             \rt, [\rn]
+.endm
+
+.macro  ldr_nreg        rt,  rn,  rm:vararg
+A       ldr             \rt, [\rn, -\rm]
+T       sub             \rt, \rn, \rm
+T       ldr             \rt, [\rt]
+.endm
+
+.macro  ldr_post        rt,  rn,  rm:vararg
+A       ldr             \rt, [\rn], \rm
+T       ldr             \rt, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  ldrc_pre        cc,  rt,  rn,  rm:vararg
+A       ldr\cc          \rt, [\rn, \rm]!
+T       itt             \cc
+T       add\cc          \rn, \rn, \rm
+T       ldr\cc          \rt, [\rn]
+.endm
+
+.macro  ldrd_reg        rt,  rt2, rn,  rm
+A       ldrd            \rt, \rt2, [\rn, \rm]
+T       add             \rt, \rn, \rm
+T       ldrd            \rt, \rt2, [\rt]
+.endm
+
+.macro  ldrd_post       rt,  rt2, rn,  rm
+A       ldrd            \rt, \rt2, [\rn], \rm
+T       ldrd            \rt, \rt2, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  ldrh_pre        rt,  rn,  rm
+A       ldrh            \rt, [\rn, \rm]!
+T       add             \rn, \rn, \rm
+T       ldrh            \rt, [\rn]
+.endm
+
+.macro  ldrh_dpre       rt,  rn,  rm
+A       ldrh            \rt, [\rn, -\rm]!
+T       sub             \rn, \rn, \rm
+T       ldrh            \rt, [\rn]
+.endm
+
+.macro  ldrh_post       rt,  rn,  rm
+A       ldrh            \rt, [\rn], \rm
+T       ldrh            \rt, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  ldrb_post       rt,  rn,  rm
+A       ldrb            \rt, [\rn], \rm
+T       ldrb            \rt, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  str_post       rt,  rn,  rm:vararg
+A       str             \rt, [\rn], \rm
+T       str             \rt, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  strb_post       rt,  rn,  rm:vararg
+A       strb            \rt, [\rn], \rm
+T       strb            \rt, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  strd_post       rt,  rt2, rn,  rm
+A       strd            \rt, \rt2, [\rn], \rm
+T       strd            \rt, \rt2, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  strh_pre        rt,  rn,  rm
+A       strh            \rt, [\rn, \rm]!
+T       add             \rn, \rn, \rm
+T       strh            \rt, [\rn]
+.endm
+
+.macro  strh_dpre       rt,  rn,  rm
+A       strh            \rt, [\rn, -\rm]!
+T       sub             \rn, \rn, \rm
+T       strh            \rt, [\rn]
+.endm
+
+.macro  strh_post       rt,  rn,  rm
+A       strh            \rt, [\rn], \rm
+T       strh            \rt, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  strh_dpost       rt,  rn,  rm
+A       strh            \rt, [\rn], -\rm
+T       strh            \rt, [\rn]
+T       sub             \rn, \rn, \rm
+.endm
+
+#if HAVE_VFP_ARGS
+ELF     .eabi_attribute 28, 1
+#   define VFP
+#   define NOVFP @
+#else
+#   define VFP   @
+#   define NOVFP
+#endif
+
+#define GLUE(a, b) a ## b
+#define JOIN(a, b) GLUE(a, b)
+#define X(s) JOIN(EXTERN_ASM, s)

ffmpeg/libavutil/arm/bswap.h

@@ -0,0 +1,50 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_ARM_BSWAP_H
+#define AVUTIL_ARM_BSWAP_H
+
+#include <stdint.h>
+#include "config.h"
+#include "libavutil/attributes.h"
+
+#ifdef __ARMCC_VERSION
+
+#if HAVE_ARMV6
+#define av_bswap32 av_bswap32
+static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
+{
+    return __rev(x);
+}
+#endif /* HAVE_ARMV6 */
+
+#elif HAVE_INLINE_ASM
+
+#if HAVE_ARMV6_INLINE
+#define av_bswap16 av_bswap16
+static av_always_inline av_const unsigned av_bswap16(unsigned x)
+{
+    unsigned y;
+
+    __asm__("rev16 %0, %1" : "=r"(y) : "r"(x));
+    return y;
+}
+#endif
+#endif /* __ARMCC_VERSION */
+
+#endif /* AVUTIL_ARM_BSWAP_H */

ffmpeg/libavutil/arm/cpu.c

@@ -0,0 +1,188 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/cpu.h"
+#include "libavutil/cpu_internal.h"
+#include "config.h"
+
+#define CORE_FLAG(f) \
+    (AV_CPU_FLAG_ ## f * (HAVE_ ## f ## _EXTERNAL || HAVE_ ## f ## _INLINE))
+
+#define CORE_CPU_FLAGS                          \
+    (CORE_FLAG(ARMV5TE) |                       \
+     CORE_FLAG(ARMV6)   |                       \
+     CORE_FLAG(ARMV6T2) |                       \
+     CORE_FLAG(VFP)     |                       \
+     CORE_FLAG(VFPV3)   |                       \
+     CORE_FLAG(NEON))
+
+#if defined __linux__ || defined __ANDROID__
+
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include "libavutil/avstring.h"
+
+#if HAVE_GETAUXVAL
+#include <sys/auxv.h>
+#endif
+
+#define AT_HWCAP        16
+
+/* Relevant HWCAP values from kernel headers */
+#define HWCAP_VFP       (1 << 6)
+#define HWCAP_EDSP      (1 << 7)
+#define HWCAP_THUMBEE   (1 << 11)
+#define HWCAP_NEON      (1 << 12)
+#define HWCAP_VFPv3     (1 << 13)
+#define HWCAP_TLS       (1 << 15)
+
+static int get_auxval(uint32_t *hwcap)
+{
+#if HAVE_GETAUXVAL
+    unsigned long ret = ff_getauxval(AT_HWCAP);
+    if (ret == 0)
+        return -1;
+    *hwcap = ret;
+    return 0;
+#else
+    return -1;
+#endif
+}
+
+static int get_hwcap(uint32_t *hwcap)
+{
+    struct { uint32_t a_type; uint32_t a_val; } auxv;
+    FILE *f = fopen("/proc/self/auxv", "r");
+    int err = -1;
+
+    if (!f)
+        return -1;
+
+    while (fread(&auxv, sizeof(auxv), 1, f) > 0) {
+        if (auxv.a_type == AT_HWCAP) {
+            *hwcap = auxv.a_val;
+            err = 0;
+            break;
+        }
+    }
+
+    fclose(f);
+    return err;
+}
+
+static int get_cpuinfo(uint32_t *hwcap)
+{
+    FILE *f = fopen("/proc/cpuinfo", "r");
+    char buf[200];
+
+    if (!f)
+        return -1;
+
+    *hwcap = 0;
+    while (fgets(buf, sizeof(buf), f)) {
+        if (av_strstart(buf, "Features", NULL)) {
+            if (strstr(buf, " edsp "))
+                *hwcap |= HWCAP_EDSP;
+            if (strstr(buf, " tls "))
+                *hwcap |= HWCAP_TLS;
+            if (strstr(buf, " thumbee "))
+                *hwcap |= HWCAP_THUMBEE;
+            if (strstr(buf, " vfp "))
+                *hwcap |= HWCAP_VFP;
+            if (strstr(buf, " vfpv3 "))
+                *hwcap |= HWCAP_VFPv3;
+            if (strstr(buf, " neon ") || strstr(buf, " asimd "))
+                *hwcap |= HWCAP_NEON;
+            if (strstr(buf, " fp ")) // Listed on 64 bit ARMv8 kernels
+                *hwcap |= HWCAP_VFP | HWCAP_VFPv3;
+            break;
+        }
+    }
+    fclose(f);
+    return 0;
+}
+
+int ff_get_cpu_flags_arm(void)
+{
+    int flags = CORE_CPU_FLAGS;
+    uint32_t hwcap;
+
+    if (get_auxval(&hwcap) < 0)
+        if (get_hwcap(&hwcap) < 0)
+            if (get_cpuinfo(&hwcap) < 0)
+                return flags;
+
+#define check_cap(cap, flag) do {               \
+        if (hwcap & HWCAP_ ## cap)              \
+            flags |= AV_CPU_FLAG_ ## flag;      \
+    } while (0)
+
+    /* No flags explicitly indicate v6 or v6T2 so check others which
+       imply support. */
+    check_cap(EDSP,    ARMV5TE);
+    check_cap(TLS,     ARMV6);
+    check_cap(THUMBEE, ARMV6T2);
+    check_cap(VFP,     VFP);
+    check_cap(VFPv3,   VFPV3);
+    check_cap(NEON,    NEON);
+
+    /* The v6 checks above are not reliable so let higher flags
+       trickle down. */
+    if (flags & (AV_CPU_FLAG_VFPV3 | AV_CPU_FLAG_NEON))
+        flags |= AV_CPU_FLAG_ARMV6T2;
+    else if (flags & (AV_CPU_FLAG_ARMV6T2 | AV_CPU_FLAG_ARMV6))
+    /* Some functions use the 'setend' instruction which is deprecated on ARMv8
+     * and serializing on some ARMv7 cores. This ensures such functions
+     * are only enabled on ARMv6. */
+        flags |= AV_CPU_FLAG_SETEND;
+
+    if (flags & AV_CPU_FLAG_ARMV6T2)
+        flags |= AV_CPU_FLAG_ARMV6;
+
+    /* set the virtual VFPv2 vector mode flag */
+    if ((flags & AV_CPU_FLAG_VFP) && !(flags & (AV_CPU_FLAG_VFPV3 | AV_CPU_FLAG_NEON)))
+        flags |= AV_CPU_FLAG_VFP_VM;
+
+    return flags;
+}
+
+#else
+
+int ff_get_cpu_flags_arm(void)
+{
+    return AV_CPU_FLAG_ARMV5TE * HAVE_ARMV5TE |
+           AV_CPU_FLAG_ARMV6   * HAVE_ARMV6   |
+           AV_CPU_FLAG_ARMV6T2 * HAVE_ARMV6T2 |
+           AV_CPU_FLAG_VFP     * HAVE_VFP     |
+           AV_CPU_FLAG_VFPV3   * HAVE_VFPV3   |
+           AV_CPU_FLAG_NEON    * HAVE_NEON    |
+           AV_CPU_FLAG_SETEND  * !(HAVE_NEON | HAVE_VFPV3);
+}
+
+#endif
+
+size_t ff_get_cpu_max_align_arm(void)
+{
+    int flags = av_get_cpu_flags();
+
+    if (flags & AV_CPU_FLAG_NEON)
+        return 16;
+
+    return 8;
+}

ffmpeg/libavutil/arm/cpu.h

@@ -0,0 +1,38 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_ARM_CPU_H
+#define AVUTIL_ARM_CPU_H
+
+#include "libavutil/cpu.h"
+#include "libavutil/cpu_internal.h"
+
+#define have_armv5te(flags) CPUEXT(flags, ARMV5TE)
+#define have_armv6(flags)   CPUEXT(flags, ARMV6)
+#define have_armv6t2(flags) CPUEXT(flags, ARMV6T2)
+#define have_vfp(flags)     CPUEXT(flags, VFP)
+#define have_vfpv3(flags)   CPUEXT(flags, VFPV3)
+#define have_neon(flags)    CPUEXT(flags, NEON)
+#define have_setend(flags)  CPUEXT(flags, SETEND)
+
+/* some functions use the VFPv2 vector mode which is deprecated in ARMv7-A
+ * and might trap on such CPU depending on the OS configuration */
+#define have_vfp_vm(flags)                                              \
+    (HAVE_VFP && ((flags) & AV_CPU_FLAG_VFP_VM))
+
+#endif /* AVUTIL_ARM_CPU_H */

ffmpeg/libavutil/arm/float_dsp_arm.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_ARM_FLOAT_DSP_ARM_H
+#define AVUTIL_ARM_FLOAT_DSP_ARM_H
+
+#include "libavutil/float_dsp.h"
+
+void ff_float_dsp_init_vfp(AVFloatDSPContext *fdsp, int cpu_flags);
+void ff_float_dsp_init_neon(AVFloatDSPContext *fdsp);
+
+#endif /* AVUTIL_ARM_FLOAT_DSP_ARM_H */

ffmpeg/libavutil/arm/float_dsp_init_arm.c

@@ -0,0 +1,32 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/attributes.h"
+#include "libavutil/float_dsp.h"
+#include "cpu.h"
+#include "float_dsp_arm.h"
+
+av_cold void ff_float_dsp_init_arm(AVFloatDSPContext *fdsp)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (have_vfp(cpu_flags))
+        ff_float_dsp_init_vfp(fdsp, cpu_flags);
+    if (have_neon(cpu_flags))
+        ff_float_dsp_init_neon(fdsp);
+}

ffmpeg/libavutil/arm/float_dsp_init_neon.c

@@ -0,0 +1,59 @@
+/*
+ * ARM NEON optimised Float DSP functions
+ * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+
+#include "libavutil/attributes.h"
+#include "libavutil/float_dsp.h"
+#include "float_dsp_arm.h"
+
+void ff_vector_fmul_neon(float *dst, const float *src0, const float *src1, int len);
+
+void ff_vector_fmac_scalar_neon(float *dst, const float *src, float mul,
+                                int len);
+
+void ff_vector_fmul_scalar_neon(float *dst, const float *src, float mul,
+                                int len);
+
+void ff_vector_fmul_window_neon(float *dst, const float *src0,
+                                const float *src1, const float *win, int len);
+
+void ff_vector_fmul_add_neon(float *dst, const float *src0, const float *src1,
+                             const float *src2, int len);
+
+void ff_vector_fmul_reverse_neon(float *dst, const float *src0,
+                                 const float *src1, int len);
+
+void ff_butterflies_float_neon(float *v1, float *v2, int len);
+
+float ff_scalarproduct_float_neon(const float *v1, const float *v2, int len);
+
+av_cold void ff_float_dsp_init_neon(AVFloatDSPContext *fdsp)
+{
+    fdsp->vector_fmul = ff_vector_fmul_neon;
+    fdsp->vector_fmac_scalar = ff_vector_fmac_scalar_neon;
+    fdsp->vector_fmul_scalar = ff_vector_fmul_scalar_neon;
+    fdsp->vector_fmul_window = ff_vector_fmul_window_neon;
+    fdsp->vector_fmul_add    = ff_vector_fmul_add_neon;
+    fdsp->vector_fmul_reverse = ff_vector_fmul_reverse_neon;
+    fdsp->butterflies_float = ff_butterflies_float_neon;
+    fdsp->scalarproduct_float = ff_scalarproduct_float_neon;
+}

ffmpeg/libavutil/arm/float_dsp_init_vfp.c

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2008 Siarhei Siamashka <ssvb@users.sourceforge.net>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/attributes.h"
+#include "libavutil/float_dsp.h"
+#include "cpu.h"
+#include "float_dsp_arm.h"
+
+void ff_vector_fmul_vfp(float *dst, const float *src0, const float *src1,
+                        int len);
+
+void ff_vector_fmul_window_vfp(float *dst, const float *src0,
+                               const float *src1, const float *win, int len);
+
+void ff_vector_fmul_reverse_vfp(float *dst, const float *src0,
+                                const float *src1, int len);
+
+void ff_butterflies_float_vfp(float *restrict v1, float *restrict v2, int len);
+
+av_cold void ff_float_dsp_init_vfp(AVFloatDSPContext *fdsp, int cpu_flags)
+{
+    if (have_vfp_vm(cpu_flags)) {
+        fdsp->vector_fmul = ff_vector_fmul_vfp;
+        fdsp->vector_fmul_window = ff_vector_fmul_window_vfp;
+    }
+    fdsp->vector_fmul_reverse = ff_vector_fmul_reverse_vfp;
+    if (have_vfp_vm(cpu_flags))
+        fdsp->butterflies_float = ff_butterflies_float_vfp;
+}

ffmpeg/libavutil/arm/float_dsp_neon.S

@@ -0,0 +1,271 @@
+/*
+ * ARM NEON optimised Float DSP functions
+ * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "asm.S"
+
+function ff_vector_fmul_neon, export=1
+        subs            r3,  r3,  #8
+        vld1.32         {d0-d3},  [r1,:128]!
+        vld1.32         {d4-d7},  [r2,:128]!
+        vmul.f32        q8,  q0,  q2
+        vmul.f32        q9,  q1,  q3
+        beq             3f
+        bics            ip,  r3,  #15
+        beq             2f
+1:      subs            ip,  ip,  #16
+        vld1.32         {d0-d1},  [r1,:128]!
+        vld1.32         {d4-d5},  [r2,:128]!
+        vmul.f32        q10, q0,  q2
+        vld1.32         {d2-d3},  [r1,:128]!
+        vld1.32         {d6-d7},  [r2,:128]!
+        vmul.f32        q11, q1,  q3
+        vst1.32         {d16-d19},[r0,:128]!
+        vld1.32         {d0-d1},  [r1,:128]!
+        vld1.32         {d4-d5},  [r2,:128]!
+        vmul.f32        q8,  q0,  q2
+        vld1.32         {d2-d3},  [r1,:128]!
+        vld1.32         {d6-d7},  [r2,:128]!
+        vmul.f32        q9,  q1,  q3
+        vst1.32         {d20-d23},[r0,:128]!
+        bne             1b
+        ands            r3,  r3,  #15
+        beq             3f
+2:      vld1.32         {d0-d1},  [r1,:128]!
+        vld1.32         {d4-d5},  [r2,:128]!
+        vst1.32         {d16-d17},[r0,:128]!
+        vmul.f32        q8,  q0,  q2
+        vld1.32         {d2-d3},  [r1,:128]!
+        vld1.32         {d6-d7},  [r2,:128]!
+        vst1.32         {d18-d19},[r0,:128]!
+        vmul.f32        q9,  q1,  q3
+3:      vst1.32         {d16-d19},[r0,:128]!
+        bx              lr
+endfunc
+
+function ff_vector_fmac_scalar_neon, export=1
+VFP     len .req r2
+VFP     acc .req r3
+NOVFP   len .req r3
+NOVFP   acc .req r2
+VFP     vdup.32         q15, d0[0]
+NOVFP   vdup.32         q15, r2
+        bics            r12, len, #15
+        mov             acc, r0
+        beq             3f
+        vld1.32         {q0},     [r1,:128]!
+        vld1.32         {q8},     [acc,:128]!
+        vld1.32         {q1},     [r1,:128]!
+        vld1.32         {q9},     [acc,:128]!
+1:      vmla.f32        q8,  q0,  q15
+        vld1.32         {q2},     [r1,:128]!
+        vld1.32         {q10},    [acc,:128]!
+        vmla.f32        q9,  q1,  q15
+        vld1.32         {q3},     [r1,:128]!
+        vld1.32         {q11},    [acc,:128]!
+        vmla.f32        q10, q2,  q15
+        vst1.32         {q8},     [r0,:128]!
+        vmla.f32        q11, q3,  q15
+        vst1.32         {q9},     [r0,:128]!
+        subs            r12, r12, #16
+        beq             2f
+        vld1.32         {q0},     [r1,:128]!
+        vld1.32         {q8},     [acc,:128]!
+        vst1.32         {q10},    [r0,:128]!
+        vld1.32         {q1},     [r1,:128]!
+        vld1.32         {q9},     [acc,:128]!
+        vst1.32         {q11},    [r0,:128]!
+        b               1b
+2:      vst1.32         {q10},    [r0,:128]!
+        vst1.32         {q11},    [r0,:128]!
+        ands            len, len, #15
+        it              eq
+        bxeq            lr
+3:      vld1.32         {q0},     [r1,:128]!
+        vld1.32         {q8},     [acc,:128]!
+        vmla.f32        q8,  q0,  q15
+        vst1.32         {q8},     [r0,:128]!
+        subs            len, len, #4
+        bgt             3b
+        bx              lr
+        .unreq          len
+endfunc
+
+function ff_vector_fmul_scalar_neon, export=1
+VFP     len .req r2
+NOVFP   len .req r3
+VFP     vdup.32         q8,  d0[0]
+NOVFP   vdup.32         q8,  r2
+        bics            r12, len, #15
+        beq             3f
+        vld1.32         {q0},[r1,:128]!
+        vld1.32         {q1},[r1,:128]!
+1:      vmul.f32        q0,  q0,  q8
+        vld1.32         {q2},[r1,:128]!
+        vmul.f32        q1,  q1,  q8
+        vld1.32         {q3},[r1,:128]!
+        vmul.f32        q2,  q2,  q8
+        vst1.32         {q0},[r0,:128]!
+        vmul.f32        q3,  q3,  q8
+        vst1.32         {q1},[r0,:128]!
+        subs            r12, r12, #16
+        beq             2f
+        vld1.32         {q0},[r1,:128]!
+        vst1.32         {q2},[r0,:128]!
+        vld1.32         {q1},[r1,:128]!
+        vst1.32         {q3},[r0,:128]!
+        b               1b
+2:      vst1.32         {q2},[r0,:128]!
+        vst1.32         {q3},[r0,:128]!
+        ands            len, len, #15
+        it              eq
+        bxeq            lr
+3:      vld1.32         {q0},[r1,:128]!
+        vmul.f32        q0,  q0,  q8
+        vst1.32         {q0},[r0,:128]!
+        subs            len, len, #4
+        bgt             3b
+        bx              lr
+        .unreq          len
+endfunc
+
+function ff_vector_fmul_window_neon, export=1
+        push            {r4,r5,lr}
+        ldr             lr,  [sp, #12]
+        sub             r2,  r2,  #8
+        sub             r5,  lr,  #2
+        add             r2,  r2,  r5, lsl #2
+        add             r4,  r3,  r5, lsl #3
+        add             ip,  r0,  r5, lsl #3
+        mov             r5,  #-16
+        vld1.32         {d0,d1},  [r1,:128]!
+        vld1.32         {d2,d3},  [r2,:128], r5
+        vld1.32         {d4,d5},  [r3,:128]!
+        vld1.32         {d6,d7},  [r4,:128], r5
+1:      subs            lr,  lr,  #4
+        vmul.f32        d22, d0,  d4
+        vrev64.32       q3,  q3
+        vmul.f32        d23, d1,  d5
+        vrev64.32       q1,  q1
+        vmul.f32        d20, d0,  d7
+        vmul.f32        d21, d1,  d6
+        beq             2f
+        vmla.f32        d22, d3,  d7
+        vld1.32         {d0,d1},  [r1,:128]!
+        vmla.f32        d23, d2,  d6
+        vld1.32         {d18,d19},[r2,:128], r5
+        vmls.f32        d20, d3,  d4
+        vld1.32         {d24,d25},[r3,:128]!
+        vmls.f32        d21, d2,  d5
+        vld1.32         {d6,d7},  [r4,:128], r5
+        vmov            q1,  q9
+        vrev64.32       q11, q11
+        vmov            q2,  q12
+        vswp            d22, d23
+        vst1.32         {d20,d21},[r0,:128]!
+        vst1.32         {d22,d23},[ip,:128], r5
+        b               1b
+2:      vmla.f32        d22, d3,  d7
+        vmla.f32        d23, d2,  d6
+        vmls.f32        d20, d3,  d4
+        vmls.f32        d21, d2,  d5
+        vrev64.32       q11, q11
+        vswp            d22, d23
+        vst1.32         {d20,d21},[r0,:128]!
+        vst1.32         {d22,d23},[ip,:128], r5
+        pop             {r4,r5,pc}
+endfunc
+
+function ff_vector_fmul_add_neon, export=1
+        ldr             r12, [sp]
+        vld1.32         {q0-q1},  [r1,:128]!
+        vld1.32         {q8-q9},  [r2,:128]!
+        vld1.32         {q2-q3},  [r3,:128]!
+        vmul.f32        q10, q0,  q8
+        vmul.f32        q11, q1,  q9
+1:      vadd.f32        q12, q2,  q10
+        vadd.f32        q13, q3,  q11
+        pld             [r1, #16]
+        pld             [r2, #16]
+        pld             [r3, #16]
+        subs            r12, r12, #8
+        beq             2f
+        vld1.32         {q0},     [r1,:128]!
+        vld1.32         {q8},     [r2,:128]!
+        vmul.f32        q10, q0,  q8
+        vld1.32         {q1},     [r1,:128]!
+        vld1.32         {q9},     [r2,:128]!
+        vmul.f32        q11, q1,  q9
+        vld1.32         {q2-q3},  [r3,:128]!
+        vst1.32         {q12-q13},[r0,:128]!
+        b               1b
+2:      vst1.32         {q12-q13},[r0,:128]!
+        bx              lr
+endfunc
+
+function ff_vector_fmul_reverse_neon, export=1
+        add             r2,  r2,  r3,  lsl #2
+        sub             r2,  r2,  #32
+        mov             r12, #-32
+        vld1.32         {q0-q1},  [r1,:128]!
+        vld1.32         {q2-q3},  [r2,:128], r12
+1:      pld             [r1, #32]
+        vrev64.32       q3,  q3
+        vmul.f32        d16, d0,  d7
+        vmul.f32        d17, d1,  d6
+        pld             [r2, #-32]
+        vrev64.32       q2,  q2
+        vmul.f32        d18, d2,  d5
+        vmul.f32        d19, d3,  d4
+        subs            r3,  r3,  #8
+        beq             2f
+        vld1.32         {q0-q1},  [r1,:128]!
+        vld1.32         {q2-q3},  [r2,:128], r12
+        vst1.32         {q8-q9},  [r0,:128]!
+        b               1b
+2:      vst1.32         {q8-q9},  [r0,:128]!
+        bx              lr
+endfunc
+
+function ff_butterflies_float_neon, export=1
+1:      vld1.32         {q0},[r0,:128]
+        vld1.32         {q1},[r1,:128]
+        vsub.f32        q2,  q0,  q1
+        vadd.f32        q1,  q0,  q1
+        vst1.32         {q2},[r1,:128]!
+        vst1.32         {q1},[r0,:128]!
+        subs            r2,  r2,  #4
+        bgt             1b
+        bx              lr
+endfunc
+
+function ff_scalarproduct_float_neon, export=1
+        vmov.f32        q2,  #0.0
+1:      vld1.32         {q0},[r0,:128]!
+        vld1.32         {q1},[r1,:128]!
+        vmla.f32        q2,  q0,  q1
+        subs            r2,  r2,  #4
+        bgt             1b
+        vadd.f32        d0,  d4,  d5
+        vpadd.f32       d0,  d0,  d0
+NOVFP   vmov.32         r0,  d0[0]
+        bx              lr
+endfunc

ffmpeg/libavutil/arm/float_dsp_vfp.S

@@ -0,0 +1,457 @@
+/*
+ * Copyright (c) 2008 Siarhei Siamashka <ssvb@users.sourceforge.net>
+ *
+ * This file is part of FFmpeg
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "asm.S"
+
+/**
+ * Assume that len is a positive number and is multiple of 8
+ */
+@ void ff_vector_fmul_vfp(float *dst, const float *src0, const float *src1, int len)
+function ff_vector_fmul_vfp, export=1
+        vpush           {d8-d15}
+        fmrx            r12, fpscr
+        orr             r12, r12, #(3 << 16) /* set vector size to 4 */
+        fmxr            fpscr, r12
+
+        vldmia          r1!, {s0-s3}
+        vldmia          r2!, {s8-s11}
+        vldmia          r1!, {s4-s7}
+        vldmia          r2!, {s12-s15}
+        vmul.f32        s8,  s0,  s8
+1:
+        subs            r3,  r3,  #16
+        vmul.f32        s12, s4,  s12
+        itttt           ge
+        vldmiage        r1!, {s16-s19}
+        vldmiage        r2!, {s24-s27}
+        vldmiage        r1!, {s20-s23}
+        vldmiage        r2!, {s28-s31}
+        it              ge
+        vmulge.f32      s24, s16, s24
+        vstmia          r0!, {s8-s11}
+        vstmia          r0!, {s12-s15}
+        it              ge
+        vmulge.f32      s28, s20, s28
+        itttt           gt
+        vldmiagt        r1!, {s0-s3}
+        vldmiagt        r2!, {s8-s11}
+        vldmiagt        r1!, {s4-s7}
+        vldmiagt        r2!, {s12-s15}
+        ittt            ge
+        vmulge.f32      s8,  s0,  s8
+        vstmiage        r0!, {s24-s27}
+        vstmiage        r0!, {s28-s31}
+        bgt             1b
+
+        bic             r12, r12, #(7 << 16) /* set vector size back to 1 */
+        fmxr            fpscr, r12
+        vpop            {d8-d15}
+        bx              lr
+endfunc
+
+/**
+ * ARM VFP implementation of 'vector_fmul_window_c' function
+ * Assume that len is a positive non-zero number
+ */
+@ void ff_vector_fmul_window_vfp(float *dst, const float *src0,
+@                                const float *src1, const float *win, int len)
+function ff_vector_fmul_window_vfp, export=1
+DST0    .req    a1
+SRC0    .req    a2
+SRC1    .req    a3
+WIN0    .req    a4
+LEN     .req    v1
+DST1    .req    v2
+WIN1    .req    v3
+OLDFPSCR .req   ip
+
+        push    {v1-v3,lr}
+        ldr     LEN, [sp, #4*4+0]
+        vpush   {s16-s31}
+        fmrx    OLDFPSCR, FPSCR
+        add     DST1, DST0, LEN, lsl #3
+        add     SRC1, SRC1, LEN, lsl #2
+        add     WIN1, WIN0, LEN, lsl #3
+
+        tst     LEN, #7
+        beq     4f                          @ common case: len is a multiple of 8
+
+        ldr     lr, =0x03000000             @ RunFast mode, scalar mode
+        fmxr    FPSCR, lr
+
+        tst     LEN, #1
+        beq     1f
+        vldmdb  WIN1!, {s0}
+        vldmia  SRC0!, {s8}
+        vldmia  WIN0!, {s16}
+        vmul.f  s24, s0, s8
+        vldmdb  SRC1!, {s20}
+        vmul.f  s8, s16, s8
+        vmls.f  s24, s16, s20
+        vmla.f  s8, s0, s20
+        vstmia  DST0!, {s24}
+        vstmdb  DST1!, {s8}
+1:
+        tst     LEN, #2
+        beq     2f
+        vldmdb  WIN1!, {s0}
+        vldmdb  WIN1!, {s1}
+        vldmia  SRC0!, {s8-s9}
+        vldmia  WIN0!, {s16-s17}
+        vmul.f  s24, s0, s8
+        vmul.f  s25, s1, s9
+        vldmdb  SRC1!, {s20}
+        vldmdb  SRC1!, {s21}
+        vmul.f  s8, s16, s8
+        vmul.f  s9, s17, s9
+        vmls.f  s24, s16, s20
+        vmls.f  s25, s17, s21
+        vmla.f  s8, s0, s20
+        vmla.f  s9, s1, s21
+        vstmia  DST0!, {s24-s25}
+        vstmdb  DST1!, {s8}
+        vstmdb  DST1!, {s9}
+2:
+        tst     LEN, #4
+        beq     3f
+        vldmdb  WIN1!, {s0}
+        vldmdb  WIN1!, {s1}
+        vldmdb  WIN1!, {s2}
+        vldmdb  WIN1!, {s3}
+        vldmia  SRC0!, {s8-s11}
+        vldmia  WIN0!, {s16-s19}
+        vmul.f  s24, s0, s8
+        vmul.f  s25, s1, s9
+        vmul.f  s26, s2, s10
+        vmul.f  s27, s3, s11
+        vldmdb  SRC1!, {s20}
+        vldmdb  SRC1!, {s21}
+        vldmdb  SRC1!, {s22}
+        vldmdb  SRC1!, {s23}
+        vmul.f  s8, s16, s8
+        vmul.f  s9, s17, s9
+        vmul.f  s10, s18, s10
+        vmul.f  s11, s19, s11
+        vmls.f  s24, s16, s20
+        vmls.f  s25, s17, s21
+        vmls.f  s26, s18, s22
+        vmls.f  s27, s19, s23
+        vmla.f  s8, s0, s20
+        vmla.f  s9, s1, s21
+        vmla.f  s10, s2, s22
+        vmla.f  s11, s3, s23
+        vstmia  DST0!, {s24-s27}
+        vstmdb  DST1!, {s8}
+        vstmdb  DST1!, {s9}
+        vstmdb  DST1!, {s10}
+        vstmdb  DST1!, {s11}
+3:
+        bics    LEN, LEN, #7
+        beq     7f
+4:
+        ldr     lr, =0x03030000             @ RunFast mode, short vectors of length 4, stride 1
+        fmxr    FPSCR, lr
+
+        vldmdb  WIN1!, {s0}
+        vldmdb  WIN1!, {s1}
+        vldmdb  WIN1!, {s2}
+        vldmdb  WIN1!, {s3}
+        vldmia  SRC0!, {s8-s11}
+        vldmia  WIN0!, {s16-s19}
+        vmul.f  s24, s0, s8                     @ vector * vector
+        vldmdb  SRC1!, {s20}
+        vldmdb  SRC1!, {s21}
+        vldmdb  SRC1!, {s22}
+        vldmdb  SRC1!, {s23}
+        vmul.f  s8, s16, s8                     @ vector * vector
+        vmls.f  s24, s16, s20                   @ vector * vector
+            vldmdb  WIN1!, {s4}
+            vldmdb  WIN1!, {s5}
+            vldmdb  WIN1!, {s6}
+            vldmdb  WIN1!, {s7}
+            vldmia  SRC0!, {s12-s13}
+        vmla.f  s8, s0, s20                     @ vector * vector
+            vldmia  SRC0!, {s14-s15}
+        subs    LEN, LEN, #8
+        beq     6f
+5:          vldmia  WIN0!, {s20-s23}
+            vmul.f  s28, s4, s12                @ vector * vector
+        vstmia  DST0!, {s24-s25}
+            vldmdb  SRC1!, {s16}
+            vldmdb  SRC1!, {s17}
+            vldmdb  SRC1!, {s18}
+            vldmdb  SRC1!, {s19}
+            vmul.f  s12, s20, s12               @ vector * vector
+        vstmia  DST0!, {s26-s27}
+        vstmdb  DST1!, {s8}
+        vstmdb  DST1!, {s9}
+        vstmdb  DST1!, {s10}
+        vstmdb  DST1!, {s11}
+            vmls.f  s28, s20, s16               @ vector * vector
+                vldmdb  WIN1!, {s0}
+                vldmdb  WIN1!, {s1}
+                vldmdb  WIN1!, {s2}
+                vldmdb  WIN1!, {s3}
+                vldmia  SRC0!, {s8-s9}
+            vmla.f  s12, s4, s16                @ vector * vector
+                vldmia  SRC0!, {s10-s11}
+        subs    LEN, LEN, #8
+                vldmia  WIN0!, {s16-s19}
+                vmul.f  s24, s0, s8             @ vector * vector
+            vstmia  DST0!, {s28-s29}
+                vldmdb  SRC1!, {s20}
+                vldmdb  SRC1!, {s21}
+                vldmdb  SRC1!, {s22}
+                vldmdb  SRC1!, {s23}
+                vmul.f  s8, s16, s8             @ vector * vector
+            vstmia  DST0!, {s30-s31}
+            vstmdb  DST1!, {s12}
+            vstmdb  DST1!, {s13}
+            vstmdb  DST1!, {s14}
+            vstmdb  DST1!, {s15}
+                vmls.f  s24, s16, s20           @ vector * vector
+                    vldmdb  WIN1!, {s4}
+                    vldmdb  WIN1!, {s5}
+                    vldmdb  WIN1!, {s6}
+                    vldmdb  WIN1!, {s7}
+                    vldmia  SRC0!, {s12-s13}
+                vmla.f  s8, s0, s20             @ vector * vector
+                    vldmia  SRC0!, {s14-s15}
+        bne     5b
+6:                  vldmia  WIN0!, {s20-s23}
+                    vmul.f  s28, s4, s12        @ vector * vector
+                vstmia  DST0!, {s24-s25}
+                    vldmdb  SRC1!, {s16}
+                    vldmdb  SRC1!, {s17}
+                    vldmdb  SRC1!, {s18}
+                    vldmdb  SRC1!, {s19}
+                    vmul.f  s12, s20, s12       @ vector * vector
+                vstmia  DST0!, {s26-s27}
+                vstmdb  DST1!, {s8}
+                vstmdb  DST1!, {s9}
+                vstmdb  DST1!, {s10}
+                vstmdb  DST1!, {s11}
+                    vmls.f  s28, s20, s16       @ vector * vector
+                    vmla.f  s12, s4, s16        @ vector * vector
+                    vstmia  DST0!, {s28-s31}
+                    vstmdb  DST1!, {s12}
+                    vstmdb  DST1!, {s13}
+                    vstmdb  DST1!, {s14}
+                    vstmdb  DST1!, {s15}
+7:
+        fmxr    FPSCR, OLDFPSCR
+        vpop    {s16-s31}
+        pop     {v1-v3,pc}
+
+        .unreq  DST0
+        .unreq  SRC0
+        .unreq  SRC1
+        .unreq  WIN0
+        .unreq  LEN
+        .unreq  OLDFPSCR
+        .unreq  DST1
+        .unreq  WIN1
+endfunc
+
+/**
+ * ARM VFP optimized implementation of 'vector_fmul_reverse_c' function.
+ * Assume that len is a positive number and is multiple of 8
+ */
+@ void ff_vector_fmul_reverse_vfp(float *dst, const float *src0,
+@                                 const float *src1, int len)
+function ff_vector_fmul_reverse_vfp, export=1
+        vpush           {d8-d15}
+        add             r2,  r2,  r3, lsl #2
+        vldmdb          r2!, {s0-s3}
+        vldmia          r1!, {s8-s11}
+        vldmdb          r2!, {s4-s7}
+        vldmia          r1!, {s12-s15}
+        vmul.f32        s8,  s3,  s8
+        vmul.f32        s9,  s2,  s9
+        vmul.f32        s10, s1,  s10
+        vmul.f32        s11, s0,  s11
+1:
+        subs            r3,  r3,  #16
+        it              ge
+        vldmdbge        r2!, {s16-s19}
+        vmul.f32        s12, s7,  s12
+        it              ge
+        vldmiage        r1!, {s24-s27}
+        vmul.f32        s13, s6,  s13
+        it              ge
+        vldmdbge        r2!, {s20-s23}
+        vmul.f32        s14, s5,  s14
+        it              ge
+        vldmiage        r1!, {s28-s31}
+        vmul.f32        s15, s4,  s15
+        it              ge
+        vmulge.f32      s24, s19, s24
+        it              gt
+        vldmdbgt        r2!, {s0-s3}
+        it              ge
+        vmulge.f32      s25, s18, s25
+        vstmia          r0!, {s8-s13}
+        it              ge
+        vmulge.f32      s26, s17, s26
+        it              gt
+        vldmiagt        r1!, {s8-s11}
+        itt             ge
+        vmulge.f32      s27, s16, s27
+        vmulge.f32      s28, s23, s28
+        it              gt
+        vldmdbgt        r2!, {s4-s7}
+        it              ge
+        vmulge.f32      s29, s22, s29
+        vstmia          r0!, {s14-s15}
+        ittt            ge
+        vmulge.f32      s30, s21, s30
+        vmulge.f32      s31, s20, s31
+        vmulge.f32      s8,  s3,  s8
+        it              gt
+        vldmiagt        r1!, {s12-s15}
+        itttt           ge
+        vmulge.f32      s9,  s2,  s9
+        vmulge.f32      s10, s1,  s10
+        vstmiage        r0!, {s24-s27}
+        vmulge.f32      s11, s0,  s11
+        it              ge
+        vstmiage        r0!, {s28-s31}
+        bgt             1b
+
+        vpop            {d8-d15}
+        bx              lr
+endfunc
+
+/**
+ * ARM VFP implementation of 'butterflies_float_c' function
+ * Assume that len is a positive non-zero number
+ */
+@ void ff_butterflies_float_vfp(float *restrict v1, float *restrict v2, int len)
+function ff_butterflies_float_vfp, export=1
+BASE1   .req    a1
+BASE2   .req    a2
+LEN     .req    a3
+OLDFPSCR .req   a4
+
+        vpush   {s16-s31}
+        fmrx    OLDFPSCR, FPSCR
+
+        tst     LEN, #7
+        beq     4f                          @ common case: len is a multiple of 8
+
+        ldr     ip, =0x03000000             @ RunFast mode, scalar mode
+        fmxr    FPSCR, ip
+
+        tst     LEN, #1
+        beq     1f
+        vldmia  BASE1!, {s0}
+        vldmia  BASE2!, {s8}
+        vadd.f  s16, s0, s8
+        vsub.f  s24, s0, s8
+        vstr    s16, [BASE1, #0-4*1]
+        vstr    s24, [BASE2, #0-4*1]
+1:
+        tst     LEN, #2
+        beq     2f
+        vldmia  BASE1!, {s0-s1}
+        vldmia  BASE2!, {s8-s9}
+        vadd.f  s16, s0, s8
+        vadd.f  s17, s1, s9
+        vsub.f  s24, s0, s8
+        vsub.f  s25, s1, s9
+        vstr    d8, [BASE1, #0-8*1]    @ s16,s17
+        vstr    d12, [BASE2, #0-8*1]   @ s24,s25
+2:
+        tst     LEN, #4
+        beq     3f
+        vldmia  BASE1!, {s0-s1}
+        vldmia  BASE2!, {s8-s9}
+        vldmia  BASE1!, {s2-s3}
+        vldmia  BASE2!, {s10-s11}
+        vadd.f  s16, s0, s8
+        vadd.f  s17, s1, s9
+        vsub.f  s24, s0, s8
+        vsub.f  s25, s1, s9
+        vadd.f  s18, s2, s10
+        vadd.f  s19, s3, s11
+        vsub.f  s26, s2, s10
+        vsub.f  s27, s3, s11
+        vstr    d8, [BASE1, #0-16*1]    @ s16,s17
+        vstr    d12, [BASE2, #0-16*1]   @ s24,s25
+        vstr    d9, [BASE1, #8-16*1]    @ s18,s19
+        vstr    d13, [BASE2, #8-16*1]   @ s26,s27
+3:
+        bics    LEN, LEN, #7
+        beq     7f
+4:
+        ldr     ip, =0x03030000             @ RunFast mode, short vectors of length 4, stride 1
+        fmxr    FPSCR, ip
+
+        vldmia  BASE1!, {s0-s1}
+        vldmia  BASE2!, {s8-s9}
+        vldmia  BASE1!, {s2-s3}
+        vldmia  BASE2!, {s10-s11}
+        vadd.f  s16, s0, s8
+            vldmia  BASE1!, {s4-s5}
+            vldmia  BASE2!, {s12-s13}
+            vldmia  BASE1!, {s6-s7}
+            vldmia  BASE2!, {s14-s15}
+        vsub.f  s24, s0, s8
+            vadd.f  s20, s4, s12
+        subs    LEN, LEN, #8
+        beq     6f
+5:              vldmia  BASE1!, {s0-s3}
+                vldmia  BASE2!, {s8-s11}
+            vsub.f  s28, s4, s12
+        vstr    d8, [BASE1, #0-16*3]    @ s16,s17
+        vstr    d9, [BASE1, #8-16*3]    @ s18,s19
+        vstr    d12, [BASE2, #0-16*3]   @ s24,s25
+        vstr    d13, [BASE2, #8-16*3]   @ s26,s27
+                vadd.f  s16, s0, s8
+                    vldmia  BASE1!, {s4-s7}
+                    vldmia  BASE2!, {s12-s15}
+                vsub.f  s24, s0, s8
+            vstr    d10, [BASE1, #0-16*3]   @ s20,s21
+            vstr    d11, [BASE1, #8-16*3]   @ s22,s23
+            vstr    d14, [BASE2, #0-16*3]   @ s28,s29
+            vstr    d15, [BASE2, #8-16*3]   @ s30,s31
+                    vadd.f  s20, s4, s12
+        subs    LEN, LEN, #8
+        bne     5b
+6:                   vsub.f  s28, s4, s12
+                vstr    d8, [BASE1, #0-16*2]    @ s16,s17
+                vstr    d9, [BASE1, #8-16*2]    @ s18,s19
+                vstr    d12, [BASE2, #0-16*2]   @ s24,s25
+                vstr    d13, [BASE2, #8-16*2]   @ s26,s27
+                    vstr    d10, [BASE1, #0-16*1]   @ s20,s21
+                    vstr    d11, [BASE1, #8-16*1]   @ s22,s23
+                    vstr    d14, [BASE2, #0-16*1]   @ s28,s29
+                    vstr    d15, [BASE2, #8-16*1]   @ s30,s31
+7:
+        fmxr    FPSCR, OLDFPSCR
+        vpop    {s16-s31}
+        bx      lr
+
+        .unreq  BASE1
+        .unreq  BASE2
+        .unreq  LEN
+        .unreq  OLDFPSCR
+endfunc

ffmpeg/libavutil/arm/intmath.h

@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_ARM_INTMATH_H
+#define AVUTIL_ARM_INTMATH_H
+
+#include <stdint.h>
+
+#include "config.h"
+#include "libavutil/attributes.h"
+
+#if HAVE_INLINE_ASM
+
+#if HAVE_ARMV6_INLINE
+
+#define av_clip_uint8 av_clip_uint8_arm
+static av_always_inline av_const int av_clip_uint8_arm(int a)
+{
+    int x;
+    __asm__ ("usat %0, #8,  %1" : "=r"(x) : "r"(a));
+    return x;
+}
+
+#define av_clip_int8 av_clip_int8_arm
+static av_always_inline av_const int av_clip_int8_arm(int a)
+{
+    int x;
+    __asm__ ("ssat %0, #8,  %1" : "=r"(x) : "r"(a));
+    return x;
+}
+
+#define av_clip_uint16 av_clip_uint16_arm
+static av_always_inline av_const int av_clip_uint16_arm(int a)
+{
+    int x;
+    __asm__ ("usat %0, #16, %1" : "=r"(x) : "r"(a));
+    return x;
+}
+
+#define av_clip_int16 av_clip_int16_arm
+static av_always_inline av_const int av_clip_int16_arm(int a)
+{
+    int x;
+    __asm__ ("ssat %0, #16, %1" : "=r"(x) : "r"(a));
+    return x;
+}
+
+#define av_clip_intp2 av_clip_intp2_arm
+static av_always_inline av_const int av_clip_intp2_arm(int a, int p)
+{
+    if (av_builtin_constant_p(p)) {
+        unsigned x;
+        __asm__ ("ssat %0, %2, %1" : "=r"(x) : "r"(a), "i"(p+1));
+        return x;
+    } else {
+        if (((unsigned)a + (1 << p)) & ~((2 << p) - 1))
+            return (a >> 31) ^ ((1 << p) - 1);
+        else
+            return a;
+    }
+}
+
+#define av_clip_uintp2 av_clip_uintp2_arm
+static av_always_inline av_const unsigned av_clip_uintp2_arm(int a, int p)
+{
+    if (av_builtin_constant_p(p)) {
+        unsigned x;
+        __asm__ ("usat %0, %2, %1" : "=r"(x) : "r"(a), "i"(p));
+        return x;
+    } else {
+        if (a & ~((1<<p) - 1)) return (~a) >> 31 & ((1<<p) - 1);
+        else                   return  a;
+    }
+}
+
+#define av_sat_add32 av_sat_add32_arm
+static av_always_inline int av_sat_add32_arm(int a, int b)
+{
+    int r;
+    __asm__ ("qadd %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
+    return r;
+}
+
+#define av_sat_dadd32 av_sat_dadd32_arm
+static av_always_inline int av_sat_dadd32_arm(int a, int b)
+{
+    int r;
+    __asm__ ("qdadd %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
+    return r;
+}
+
+#define av_sat_sub32 av_sat_sub32_arm
+static av_always_inline int av_sat_sub32_arm(int a, int b)
+{
+    int r;
+    __asm__ ("qsub %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
+    return r;
+}
+
+#define av_sat_dsub32 av_sat_dsub32_arm
+static av_always_inline int av_sat_dsub32_arm(int a, int b)
+{
+    int r;
+    __asm__ ("qdsub %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
+    return r;
+}
+
+#endif /* HAVE_ARMV6_INLINE */
+
+#if HAVE_ASM_MOD_Q
+
+#define av_clipl_int32 av_clipl_int32_arm
+static av_always_inline av_const int32_t av_clipl_int32_arm(int64_t a)
+{
+    int x, y;
+    __asm__ ("adds   %1, %R2, %Q2, lsr #31  \n\t"
+             "itet   ne                     \n\t"
+             "mvnne  %1, #1<<31             \n\t"
+             "moveq  %0, %Q2                \n\t"
+             "eorne  %0, %1,  %R2, asr #31  \n\t"
+             : "=r"(x), "=&r"(y) : "r"(a) : "cc");
+    return x;
+}
+
+#endif /* HAVE_ASM_MOD_Q */
+
+#endif /* HAVE_INLINE_ASM */
+
+#endif /* AVUTIL_ARM_INTMATH_H */

ffmpeg/libavutil/arm/neontest.h

@@ -0,0 +1,67 @@
+/*
+ * check NEON registers for clobbering
+ * Copyright (c) 2008 Ramiro Polla <ramiro.polla@gmail.com>
+ * Copyright (c) 2013 Martin Storsjo
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_ARM_NEONTEST_H
+#define AVUTIL_ARM_NEONTEST_H
+
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+
+#include "libavutil/bswap.h"
+
+#define storeneonregs(mem)                \
+    __asm__ volatile(                     \
+        "vstm %0, {d8-d15}\n\t"           \
+        :: "r"(mem) : "memory")
+
+#define testneonclobbers(func, ctx, ...)                        \
+    uint64_t neon[2][8];                                        \
+    int ret;                                                    \
+    storeneonregs(neon[0]);                                     \
+    ret = __real_ ## func(ctx, __VA_ARGS__);                    \
+    storeneonregs(neon[1]);                                     \
+    if (memcmp(neon[0], neon[1], sizeof(neon[0]))) {            \
+        int i;                                                  \
+        av_log(ctx, AV_LOG_ERROR,                               \
+               "NEON REGS CLOBBERED IN %s!\n", #func);          \
+        for (i = 0; i < 8; i ++)                                \
+            if (neon[0][i] != neon[1][i]) {                     \
+                av_log(ctx, AV_LOG_ERROR,                       \
+                       "d%-2d = %016"PRIx64"\n",                \
+                       8 + i, av_bswap64(neon[0][i]));          \
+                av_log(ctx, AV_LOG_ERROR,                       \
+                       "   -> %016"PRIx64"\n",                  \
+                       av_bswap64(neon[1][i]));                 \
+            }                                                   \
+        abort();                                                \
+    }                                                           \
+    return ret
+
+#define wrap(func)      \
+int __real_ ## func;    \
+int __wrap_ ## func;    \
+int __wrap_ ## func
+
+#endif /* AVUTIL_ARM_NEONTEST_H */

ffmpeg/libavutil/arm/timer.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_ARM_TIMER_H
+#define AVUTIL_ARM_TIMER_H
+
+#include <stdint.h>
+#include "config.h"
+
+#if defined(__APPLE__)
+
+#include <mach/mach_time.h>
+
+#define AV_READ_TIME mach_absolute_time
+
+#elif HAVE_INLINE_ASM && defined(__ARM_ARCH_7A__)
+
+#define AV_READ_TIME read_time
+
+static inline uint64_t read_time(void)
+{
+    unsigned cc;
+    __asm__ volatile ("mrc p15, 0, %0, c9, c13, 0" : "=r"(cc));
+    return cc;
+}
+
+#endif /* HAVE_INLINE_ASM && __ARM_ARCH_7A__ */
+
+#endif /* AVUTIL_ARM_TIMER_H */

ffmpeg/libavutil/attributes.h

@@ -0,0 +1,175 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Macro definitions for various function/variable attributes
+ */
+
+#ifndef AVUTIL_ATTRIBUTES_H
+#define AVUTIL_ATTRIBUTES_H
+
+#ifdef __GNUC__
+#    define AV_GCC_VERSION_AT_LEAST(x,y) (__GNUC__ > (x) || __GNUC__ == (x) && __GNUC_MINOR__ >= (y))
+#    define AV_GCC_VERSION_AT_MOST(x,y)  (__GNUC__ < (x) || __GNUC__ == (x) && __GNUC_MINOR__ <= (y))
+#else
+#    define AV_GCC_VERSION_AT_LEAST(x,y) 0
+#    define AV_GCC_VERSION_AT_MOST(x,y)  0
+#endif
+
+#ifdef __has_builtin
+#    define AV_HAS_BUILTIN(x) __has_builtin(x)
+#else
+#    define AV_HAS_BUILTIN(x) 0
+#endif
+
+#ifndef av_always_inline
+#if AV_GCC_VERSION_AT_LEAST(3,1)
+#    define av_always_inline __attribute__((always_inline)) inline
+#elif defined(_MSC_VER)
+#    define av_always_inline __forceinline
+#else
+#    define av_always_inline inline
+#endif
+#endif
+
+#ifndef av_extern_inline
+#if defined(__ICL) && __ICL >= 1210 || defined(__GNUC_STDC_INLINE__)
+#    define av_extern_inline extern inline
+#else
+#    define av_extern_inline inline
+#endif
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3,4)
+#    define av_warn_unused_result __attribute__((warn_unused_result))
+#else
+#    define av_warn_unused_result
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3,1)
+#    define av_noinline __attribute__((noinline))
+#elif defined(_MSC_VER)
+#    define av_noinline __declspec(noinline)
+#else
+#    define av_noinline
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3,1) || defined(__clang__)
+#    define av_pure __attribute__((pure))
+#else
+#    define av_pure
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(2,6) || defined(__clang__)
+#    define av_const __attribute__((const))
+#else
+#    define av_const
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(4,3) || defined(__clang__)
+#    define av_cold __attribute__((cold))
+#else
+#    define av_cold
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(4,1) && !defined(__llvm__)
+#    define av_flatten __attribute__((flatten))
+#else
+#    define av_flatten
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3,1)
+#    define attribute_deprecated __attribute__((deprecated))
+#elif defined(_MSC_VER)
+#    define attribute_deprecated __declspec(deprecated)
+#else
+#    define attribute_deprecated
+#endif
+
+/**
+ * Disable warnings about deprecated features
+ * This is useful for sections of code kept for backward compatibility and
+ * scheduled for removal.
+ */
+#ifndef AV_NOWARN_DEPRECATED
+#if AV_GCC_VERSION_AT_LEAST(4,6) || defined(__clang__)
+#    define AV_NOWARN_DEPRECATED(code) \
+        _Pragma("GCC diagnostic push") \
+        _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") \
+        code \
+        _Pragma("GCC diagnostic pop")
+#elif defined(_MSC_VER)
+#    define AV_NOWARN_DEPRECATED(code) \
+        __pragma(warning(push)) \
+        __pragma(warning(disable : 4996)) \
+        code; \
+        __pragma(warning(pop))
+#else
+#    define AV_NOWARN_DEPRECATED(code) code
+#endif
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#    define av_unused __attribute__((unused))
+#else
+#    define av_unused
+#endif
+
+/**
+ * Mark a variable as used and prevent the compiler from optimizing it
+ * away.  This is useful for variables accessed only from inline
+ * assembler without the compiler being aware.
+ */
+#if AV_GCC_VERSION_AT_LEAST(3,1) || defined(__clang__)
+#    define av_used __attribute__((used))
+#else
+#    define av_used
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3,3) || defined(__clang__)
+#   define av_alias __attribute__((may_alias))
+#else
+#   define av_alias
+#endif
+
+#if (defined(__GNUC__) || defined(__clang__)) && !defined(__INTEL_COMPILER)
+#    define av_uninit(x) x=x
+#else
+#    define av_uninit(x) x
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#    define av_builtin_constant_p __builtin_constant_p
+#    define av_printf_format(fmtpos, attrpos) __attribute__((__format__(__printf__, fmtpos, attrpos)))
+#    define av_scanf_format(fmtpos, attrpos) __attribute__((__format__(__scanf__, fmtpos, attrpos)))
+#else
+#    define av_builtin_constant_p(x) 0
+#    define av_printf_format(fmtpos, attrpos)
+#    define av_scanf_format(fmtpos, attrpos)
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(2,5) || defined(__clang__)
+#    define av_noreturn __attribute__((noreturn))
+#else
+#    define av_noreturn
+#endif
+
+#endif /* AVUTIL_ATTRIBUTES_H */

ffmpeg/libavutil/attributes_internal.h

@@ -0,0 +1,36 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_ATTRIBUTES_INTERNAL_H
+#define AVUTIL_ATTRIBUTES_INTERNAL_H
+
+#include "attributes.h"
+
+#if (AV_GCC_VERSION_AT_LEAST(4,0) || defined(__clang__)) && (defined(__ELF__) || defined(__MACH__))
+#    define attribute_visibility_hidden __attribute__((visibility("hidden")))
+#    define FF_VISIBILITY_PUSH_HIDDEN   _Pragma("GCC visibility push(hidden)")
+#    define FF_VISIBILITY_POP_HIDDEN    _Pragma("GCC visibility pop")
+#else
+#    define attribute_visibility_hidden
+#    define FF_VISIBILITY_PUSH_HIDDEN
+#    define FF_VISIBILITY_POP_HIDDEN
+#endif
+
+#define EXTERN extern attribute_visibility_hidden
+
+#endif /* AVUTIL_ATTRIBUTES_INTERNAL_H */

ffmpeg/libavutil/audio_fifo.c

@@ -0,0 +1,230 @@
+/*
+ * Audio FIFO
+ * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Audio FIFO
+ */
+
+#include <limits.h>
+#include <stddef.h>
+
+#include "audio_fifo.h"
+#include "error.h"
+#include "fifo.h"
+#include "macros.h"
+#include "mem.h"
+#include "samplefmt.h"
+
+struct AVAudioFifo {
+    AVFifo **buf;                   /**< single buffer for interleaved, per-channel buffers for planar */
+    int nb_buffers;                 /**< number of buffers */
+    int nb_samples;                 /**< number of samples currently in the FIFO */
+    int allocated_samples;          /**< current allocated size, in samples */
+
+    int channels;                   /**< number of channels */
+    enum AVSampleFormat sample_fmt; /**< sample format */
+    int sample_size;                /**< size, in bytes, of one sample in a buffer */
+};
+
+void av_audio_fifo_free(AVAudioFifo *af)
+{
+    if (af) {
+        if (af->buf) {
+            int i;
+            for (i = 0; i < af->nb_buffers; i++) {
+                av_fifo_freep2(&af->buf[i]);
+            }
+            av_freep(&af->buf);
+        }
+        av_free(af);
+    }
+}
+
+AVAudioFifo *av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels,
+                                 int nb_samples)
+{
+    AVAudioFifo *af;
+    int buf_size, i;
+
+    /* get channel buffer size (also validates parameters) */
+    if (av_samples_get_buffer_size(&buf_size, channels, nb_samples, sample_fmt, 1) < 0)
+        return NULL;
+
+    af = av_mallocz(sizeof(*af));
+    if (!af)
+        return NULL;
+
+    af->channels    = channels;
+    af->sample_fmt  = sample_fmt;
+    af->sample_size = buf_size / nb_samples;
+    af->nb_buffers  = av_sample_fmt_is_planar(sample_fmt) ? channels : 1;
+
+    af->buf = av_calloc(af->nb_buffers, sizeof(*af->buf));
+    if (!af->buf)
+        goto error;
+
+    for (i = 0; i < af->nb_buffers; i++) {
+        af->buf[i] = av_fifo_alloc2(buf_size, 1, 0);
+        if (!af->buf[i])
+            goto error;
+    }
+    af->allocated_samples = nb_samples;
+
+    return af;
+
+error:
+    av_audio_fifo_free(af);
+    return NULL;
+}
+
+int av_audio_fifo_realloc(AVAudioFifo *af, int nb_samples)
+{
+    const size_t cur_size = av_fifo_can_read (af->buf[0]) +
+                            av_fifo_can_write(af->buf[0]);
+    int i, ret, buf_size;
+
+    if ((ret = av_samples_get_buffer_size(&buf_size, af->channels, nb_samples,
+                                          af->sample_fmt, 1)) < 0)
+        return ret;
+
+    if (buf_size > cur_size) {
+        for (i = 0; i < af->nb_buffers; i++) {
+            if ((ret = av_fifo_grow2(af->buf[i], buf_size - cur_size)) < 0)
+                return ret;
+        }
+    }
+    af->allocated_samples = nb_samples;
+    return 0;
+}
+
+int av_audio_fifo_write(AVAudioFifo *af, void * const *data, int nb_samples)
+{
+    int i, ret, size;
+
+    /* automatically reallocate buffers if needed */
+    if (av_audio_fifo_space(af) < nb_samples) {
+        int current_size = av_audio_fifo_size(af);
+        /* check for integer overflow in new size calculation */
+        if (INT_MAX / 2 - current_size < nb_samples)
+            return AVERROR(EINVAL);
+        /* reallocate buffers */
+        if ((ret = av_audio_fifo_realloc(af, 2 * (current_size + nb_samples))) < 0)
+            return ret;
+    }
+
+    size = nb_samples * af->sample_size;
+    for (i = 0; i < af->nb_buffers; i++) {
+        ret = av_fifo_write(af->buf[i], data[i], size);
+        if (ret < 0)
+            return AVERROR_BUG;
+    }
+    af->nb_samples += nb_samples;
+
+    return nb_samples;
+}
+
+int av_audio_fifo_peek(const AVAudioFifo *af, void * const *data, int nb_samples)
+{
+    return av_audio_fifo_peek_at(af, data, nb_samples, 0);
+}
+
+int av_audio_fifo_peek_at(const AVAudioFifo *af, void * const *data,
+                          int nb_samples, int offset)
+{
+    int i, ret, size;
+
+    if (offset < 0 || offset >= af->nb_samples)
+        return AVERROR(EINVAL);
+    if (nb_samples < 0)
+        return AVERROR(EINVAL);
+    nb_samples = FFMIN(nb_samples, af->nb_samples);
+    if (!nb_samples)
+        return 0;
+    if (offset > af->nb_samples - nb_samples)
+        return AVERROR(EINVAL);
+
+    offset *= af->sample_size;
+    size = nb_samples * af->sample_size;
+    for (i = 0; i < af->nb_buffers; i++) {
+        if ((ret = av_fifo_peek(af->buf[i], data[i], size, offset)) < 0)
+            return AVERROR_BUG;
+    }
+
+    return nb_samples;
+}
+
+int av_audio_fifo_read(AVAudioFifo *af, void * const *data, int nb_samples)
+{
+    int i, size;
+
+    if (nb_samples < 0)
+        return AVERROR(EINVAL);
+    nb_samples = FFMIN(nb_samples, af->nb_samples);
+    if (!nb_samples)
+        return 0;
+
+    size = nb_samples * af->sample_size;
+    for (i = 0; i < af->nb_buffers; i++) {
+        if (av_fifo_read(af->buf[i], data[i], size) < 0)
+            return AVERROR_BUG;
+    }
+    af->nb_samples -= nb_samples;
+
+    return nb_samples;
+}
+
+int av_audio_fifo_drain(AVAudioFifo *af, int nb_samples)
+{
+    int i, size;
+
+    if (nb_samples < 0)
+        return AVERROR(EINVAL);
+    nb_samples = FFMIN(nb_samples, af->nb_samples);
+
+    if (nb_samples) {
+        size = nb_samples * af->sample_size;
+        for (i = 0; i < af->nb_buffers; i++)
+            av_fifo_drain2(af->buf[i], size);
+        af->nb_samples -= nb_samples;
+    }
+    return 0;
+}
+
+void av_audio_fifo_reset(AVAudioFifo *af)
+{
+    int i;
+
+    for (i = 0; i < af->nb_buffers; i++)
+        av_fifo_reset2(af->buf[i]);
+
+    af->nb_samples = 0;
+}
+
+int av_audio_fifo_size(AVAudioFifo *af)
+{
+    return af->nb_samples;
+}
+
+int av_audio_fifo_space(AVAudioFifo *af)
+{
+    return af->allocated_samples - af->nb_samples;
+}

ffmpeg/libavutil/audio_fifo.h

@@ -0,0 +1,187 @@
+/*
+ * Audio FIFO
+ * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Audio FIFO Buffer
+ */
+
+#ifndef AVUTIL_AUDIO_FIFO_H
+#define AVUTIL_AUDIO_FIFO_H
+
+#include "attributes.h"
+#include "samplefmt.h"
+
+/**
+ * @addtogroup lavu_audio
+ * @{
+ *
+ * @defgroup lavu_audiofifo Audio FIFO Buffer
+ * @{
+ */
+
+/**
+ * Context for an Audio FIFO Buffer.
+ *
+ * - Operates at the sample level rather than the byte level.
+ * - Supports multiple channels with either planar or packed sample format.
+ * - Automatic reallocation when writing to a full buffer.
+ */
+typedef struct AVAudioFifo AVAudioFifo;
+
+/**
+ * Free an AVAudioFifo.
+ *
+ * @param af  AVAudioFifo to free
+ */
+void av_audio_fifo_free(AVAudioFifo *af);
+
+/**
+ * Allocate an AVAudioFifo.
+ *
+ * @param sample_fmt  sample format
+ * @param channels    number of channels
+ * @param nb_samples  initial allocation size, in samples
+ * @return            newly allocated AVAudioFifo, or NULL on error
+ */
+AVAudioFifo *av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels,
+                                 int nb_samples);
+
+/**
+ * Reallocate an AVAudioFifo.
+ *
+ * @param af          AVAudioFifo to reallocate
+ * @param nb_samples  new allocation size, in samples
+ * @return            0 if OK, or negative AVERROR code on failure
+ */
+av_warn_unused_result
+int av_audio_fifo_realloc(AVAudioFifo *af, int nb_samples);
+
+/**
+ * Write data to an AVAudioFifo.
+ *
+ * The AVAudioFifo will be reallocated automatically if the available space
+ * is less than nb_samples.
+ *
+ * @see enum AVSampleFormat
+ * The documentation for AVSampleFormat describes the data layout.
+ *
+ * @param af          AVAudioFifo to write to
+ * @param data        audio data plane pointers
+ * @param nb_samples  number of samples to write
+ * @return            number of samples actually written, or negative AVERROR
+ *                    code on failure. If successful, the number of samples
+ *                    actually written will always be nb_samples.
+ */
+int av_audio_fifo_write(AVAudioFifo *af, void * const *data, int nb_samples);
+
+/**
+ * Peek data from an AVAudioFifo.
+ *
+ * @see enum AVSampleFormat
+ * The documentation for AVSampleFormat describes the data layout.
+ *
+ * @param af          AVAudioFifo to read from
+ * @param data        audio data plane pointers
+ * @param nb_samples  number of samples to peek
+ * @return            number of samples actually peek, or negative AVERROR code
+ *                    on failure. The number of samples actually peek will not
+ *                    be greater than nb_samples, and will only be less than
+ *                    nb_samples if av_audio_fifo_size is less than nb_samples.
+ */
+int av_audio_fifo_peek(const AVAudioFifo *af, void * const *data, int nb_samples);
+
+/**
+ * Peek data from an AVAudioFifo.
+ *
+ * @see enum AVSampleFormat
+ * The documentation for AVSampleFormat describes the data layout.
+ *
+ * @param af          AVAudioFifo to read from
+ * @param data        audio data plane pointers
+ * @param nb_samples  number of samples to peek
+ * @param offset      offset from current read position
+ * @return            number of samples actually peek, or negative AVERROR code
+ *                    on failure. The number of samples actually peek will not
+ *                    be greater than nb_samples, and will only be less than
+ *                    nb_samples if av_audio_fifo_size is less than nb_samples.
+ */
+int av_audio_fifo_peek_at(const AVAudioFifo *af, void * const *data,
+                          int nb_samples, int offset);
+
+/**
+ * Read data from an AVAudioFifo.
+ *
+ * @see enum AVSampleFormat
+ * The documentation for AVSampleFormat describes the data layout.
+ *
+ * @param af          AVAudioFifo to read from
+ * @param data        audio data plane pointers
+ * @param nb_samples  number of samples to read
+ * @return            number of samples actually read, or negative AVERROR code
+ *                    on failure. The number of samples actually read will not
+ *                    be greater than nb_samples, and will only be less than
+ *                    nb_samples if av_audio_fifo_size is less than nb_samples.
+ */
+int av_audio_fifo_read(AVAudioFifo *af, void * const *data, int nb_samples);
+
+/**
+ * Drain data from an AVAudioFifo.
+ *
+ * Removes the data without reading it.
+ *
+ * @param af          AVAudioFifo to drain
+ * @param nb_samples  number of samples to drain
+ * @return            0 if OK, or negative AVERROR code on failure
+ */
+int av_audio_fifo_drain(AVAudioFifo *af, int nb_samples);
+
+/**
+ * Reset the AVAudioFifo buffer.
+ *
+ * This empties all data in the buffer.
+ *
+ * @param af  AVAudioFifo to reset
+ */
+void av_audio_fifo_reset(AVAudioFifo *af);
+
+/**
+ * Get the current number of samples in the AVAudioFifo available for reading.
+ *
+ * @param af  the AVAudioFifo to query
+ * @return    number of samples available for reading
+ */
+int av_audio_fifo_size(AVAudioFifo *af);
+
+/**
+ * Get the current number of samples in the AVAudioFifo available for writing.
+ *
+ * @param af  the AVAudioFifo to query
+ * @return    number of samples available for writing
+ */
+int av_audio_fifo_space(AVAudioFifo *af);
+
+/**
+ * @}
+ * @}
+ */
+
+#endif /* AVUTIL_AUDIO_FIFO_H */

ffmpeg/libavutil/avassert.h

@@ -0,0 +1,123 @@
+/*
+ * copyright (c) 2010 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * simple assert() macros that are a bit more flexible than ISO C assert().
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#ifndef AVUTIL_AVASSERT_H
+#define AVUTIL_AVASSERT_H
+
+#include <stdlib.h>
+#ifdef HAVE_AV_CONFIG_H
+#   include "config.h"
+#endif
+#include "attributes.h"
+#include "log.h"
+#include "macros.h"
+
+/**
+ * assert() equivalent, that is always enabled.
+ */
+#define av_assert0(cond) do {                                           \
+    if (!(cond)) {                                                      \
+        av_log(NULL, AV_LOG_PANIC, "Assertion %s failed at %s:%d\n",    \
+               AV_STRINGIFY(cond), __FILE__, __LINE__);                 \
+        abort();                                                        \
+    }                                                                   \
+} while (0)
+
+
+/**
+ * assert() equivalent, that does not lie in speed critical code.
+ * These asserts() thus can be enabled without fearing speed loss.
+ */
+#if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 0
+#define av_assert1(cond) av_assert0(cond)
+#else
+#define av_assert1(cond) ((void)0)
+#endif
+
+
+/**
+ * assert() equivalent, that does lie in speed critical code.
+ */
+#if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 1
+#define av_assert2(cond) av_assert0(cond)
+#define av_assert2_fpu() av_assert0_fpu()
+#else
+#define av_assert2(cond) ((void)0)
+#define av_assert2_fpu() ((void)0)
+#endif
+
+/**
+ * Assert that floating point operations can be executed.
+ *
+ * This will av_assert0() that the cpu is not in MMX state on X86
+ */
+void av_assert0_fpu(void);
+
+/**
+ * Asserts that are used as compiler optimization hints depending
+ * upon ASSERT_LEVEL and NBDEBUG.
+ *
+ * Undefined behaviour occurs if execution reaches a point marked
+ * with av_unreachable() or if a condition used with av_assume()
+ * is false.
+ *
+ * The condition used with av_assume() should not have side-effects
+ * and should be visible to the compiler.
+ */
+#if defined(ASSERT_LEVEL) ? ASSERT_LEVEL > 0 : !defined(HAVE_AV_CONFIG_H) && !defined(NDEBUG)
+#define av_unreachable(msg)                                             \
+do {                                                                    \
+    av_log(NULL, AV_LOG_PANIC,                                          \
+           "Reached supposedly unreachable code at %s:%d: %s\n",        \
+           __FILE__, __LINE__, msg);                                    \
+    abort();                                                            \
+} while (0)
+#define av_assume(cond) av_assert0(cond)
+#else
+#if AV_GCC_VERSION_AT_LEAST(4, 5) || AV_HAS_BUILTIN(__builtin_unreachable)
+#define av_unreachable(msg) __builtin_unreachable()
+#elif  defined(_MSC_VER)
+#define av_unreachable(msg) __assume(0)
+#elif __STDC_VERSION__ >= 202311L
+#include <stddef.h>
+#define av_unreachable(msg) unreachable()
+#else
+#define av_unreachable(msg) ((void)0)
+#endif
+
+#if AV_HAS_BUILTIN(__builtin_assume)
+#define av_assume(cond) __builtin_assume(cond)
+#elif defined(_MSC_VER)
+#define av_assume(cond) __assume(cond)
+#else
+#define av_assume(cond) do { \
+    if (!(cond))             \
+        av_unreachable();    \
+} while (0)
+#endif
+#endif
+
+#endif /* AVUTIL_AVASSERT_H */

ffmpeg/libavutil/avsscanf.c

@@ -0,0 +1,969 @@
+/*
+ * Copyright (c) 2005-2014 Rich Felker, et al.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <errno.h>
+#include <limits.h>
+#include <math.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <float.h>
+
+#include "avstring.h"
+#include "libm.h"
+
+typedef struct FFFILE {
+    size_t buf_size;
+    unsigned char *buf;
+    unsigned char *rpos, *rend;
+    unsigned char *shend;
+    ptrdiff_t shlim, shcnt;
+    void *cookie;
+    size_t (*read)(struct FFFILE *, unsigned char *, size_t);
+} FFFILE;
+
+#define SIZE_hh -2
+#define SIZE_h  -1
+#define SIZE_def 0
+#define SIZE_l   1
+#define SIZE_L   2
+#define SIZE_ll  3
+
+#define shcnt(f) ((f)->shcnt + ((f)->rpos - (f)->buf))
+
+static int fftoread(FFFILE *f)
+{
+    f->rpos = f->rend = f->buf + f->buf_size;
+    return 0;
+}
+
+static size_t ffstring_read(FFFILE *f, unsigned char *buf, size_t len)
+{
+    char *src = f->cookie;
+    size_t k = len+256;
+    char *end = memchr(src, 0, k);
+
+    if (end) k = end-src;
+    if (k < len) len = k;
+    memcpy(buf, src, len);
+    f->rpos = (void *)(src+len);
+    f->rend = (void *)(src+k);
+    f->cookie = src+k;
+
+    return len;
+}
+
+static int ffuflow(FFFILE *f)
+{
+    unsigned char c;
+    if (!fftoread(f) && f->read(f, &c, 1)==1) return c;
+    return EOF;
+}
+
+static void ffshlim(FFFILE *f, ptrdiff_t lim)
+{
+    f->shlim = lim;
+    f->shcnt = f->buf - f->rpos;
+    /* If lim is nonzero, rend must be a valid pointer. */
+    if (lim && f->rend - f->rpos > lim)
+        f->shend = f->rpos + lim;
+    else
+        f->shend = f->rend;
+}
+
+static int ffshgetc(FFFILE *f)
+{
+    int c;
+    ptrdiff_t cnt = shcnt(f);
+    if (f->shlim && cnt >= f->shlim || (c=ffuflow(f)) < 0) {
+        f->shcnt = f->buf - f->rpos + cnt;
+        f->shend = 0;
+        return EOF;
+    }
+    cnt++;
+    if (f->shlim && f->rend - f->rpos > f->shlim - cnt)
+        f->shend = f->rpos + (f->shlim - cnt);
+    else
+        f->shend = f->rend;
+    f->shcnt = f->buf - f->rpos + cnt;
+    if (f->rpos[-1] != c) f->rpos[-1] = c;
+    return c;
+}
+
+#define shlim(f, lim) ffshlim((f), (lim))
+#define shgetc(f) (((f)->rpos < (f)->shend) ? *(f)->rpos++ : ffshgetc(f))
+#define shunget(f) ((f)->shend ? (void)(f)->rpos-- : (void)0)
+
+static const unsigned char table[] = { -1,
+    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+    0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1,-1,-1,-1,-1,
+    -1,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,
+    25,26,27,28,29,30,31,32,33,34,35,-1,-1,-1,-1,-1,
+    -1,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,
+    25,26,27,28,29,30,31,32,33,34,35,-1,-1,-1,-1,-1,
+    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
+};
+
+static unsigned long long ffintscan(FFFILE *f, unsigned base, int pok, unsigned long long lim)
+{
+    const unsigned char *val = table+1;
+    int c, neg=0;
+    unsigned x;
+    unsigned long long y;
+    if (base > 36 || base == 1) {
+        errno = EINVAL;
+        return 0;
+    }
+    while (av_isspace((c=shgetc(f))));
+    if (c=='+' || c=='-') {
+        neg = -(c=='-');
+        c = shgetc(f);
+    }
+    if ((base == 0 || base == 16) && c=='0') {
+        c = shgetc(f);
+        if ((c|32)=='x') {
+            c = shgetc(f);
+            if (val[c]>=16) {
+                shunget(f);
+                if (pok) shunget(f);
+                else shlim(f, 0);
+                return 0;
+            }
+            base = 16;
+        } else if (base == 0) {
+            base = 8;
+        }
+    } else {
+        if (base == 0) base = 10;
+        if (val[c] >= base) {
+            shunget(f);
+            shlim(f, 0);
+            errno = EINVAL;
+            return 0;
+        }
+    }
+    if (base == 10) {
+        for (x=0; c-'0'<10U && x<=UINT_MAX/10-1; c=shgetc(f))
+            x = x*10 + (c-'0');
+        for (y=x; c-'0'<10U && y<=ULLONG_MAX/10 && 10*y<=ULLONG_MAX-(c-'0'); c=shgetc(f))
+            y = y*10 + (c-'0');
+        if (c-'0'>=10U) goto done;
+    } else if (!(base & base-1)) {
+        int bs = "\0\1\2\4\7\3\6\5"[(0x17*base)>>5&7];
+        for (x=0; val[c]<base && x<=UINT_MAX/32; c=shgetc(f))
+            x = x<<bs | val[c];
+        for (y=x; val[c]<base && y<=ULLONG_MAX>>bs; c=shgetc(f))
+            y = y<<bs | val[c];
+    } else {
+        for (x=0; val[c]<base && x<=UINT_MAX/36-1; c=shgetc(f))
+            x = x*base + val[c];
+        for (y=x; val[c]<base && y<=ULLONG_MAX/base && base*y<=ULLONG_MAX-val[c]; c=shgetc(f))
+            y = y*base + val[c];
+    }
+    if (val[c]<base) {
+        for (; val[c]<base; c=shgetc(f));
+        errno = ERANGE;
+        y = lim;
+        if (lim&1) neg = 0;
+    }
+done:
+    shunget(f);
+    if (y>=lim) {
+        if (!(lim&1) && !neg) {
+            errno = ERANGE;
+            return lim-1;
+        } else if (y>lim) {
+            errno = ERANGE;
+            return lim;
+        }
+    }
+    return (y^neg)-neg;
+}
+
+static long long scanexp(FFFILE *f, int pok)
+{
+    int c;
+    int x;
+    long long y;
+    int neg = 0;
+
+    c = shgetc(f);
+    if (c=='+' || c=='-') {
+        neg = (c=='-');
+        c = shgetc(f);
+        if (c-'0'>=10U && pok) shunget(f);
+    }
+    if (c-'0'>=10U) {
+        shunget(f);
+        return LLONG_MIN;
+    }
+    for (x=0; c-'0'<10U && x<INT_MAX/10; c = shgetc(f))
+        x = 10*x + (c-'0');
+    for (y=x; c-'0'<10U && y<LLONG_MAX/100; c = shgetc(f))
+        y = 10*y + (c-'0');
+    for (; c-'0'<10U; c = shgetc(f));
+    shunget(f);
+    return neg ? -y : y;
+}
+
+#define LD_B1B_DIG 2
+#define LD_B1B_MAX 9007199, 254740991
+#define KMAX 128
+#define MASK (KMAX-1)
+
+static double decfloat(FFFILE *f, int c, int bits, int emin, int sign, int pok)
+{
+    uint32_t x[KMAX];
+    static const uint32_t th[] = { LD_B1B_MAX };
+    int i, j, k, a, z;
+    long long lrp=0, dc=0;
+    long long e10=0;
+    int lnz = 0;
+    int gotdig = 0, gotrad = 0;
+    int rp;
+    int e2;
+    int emax = -emin-bits+3;
+    int denormal = 0;
+    double y;
+    double frac=0;
+    double bias=0;
+    static const int p10s[] = { 10, 100, 1000, 10000,
+        100000, 1000000, 10000000, 100000000 };
+
+    j=0;
+    k=0;
+
+    /* Don't let leading zeros consume buffer space */
+    for (; c=='0'; c = shgetc(f)) gotdig=1;
+    if (c=='.') {
+        gotrad = 1;
+        for (c = shgetc(f); c=='0'; c = shgetc(f)) gotdig=1, lrp--;
+    }
+
+    x[0] = 0;
+    for (; c-'0'<10U || c=='.'; c = shgetc(f)) {
+        if (c == '.') {
+            if (gotrad) break;
+            gotrad = 1;
+            lrp = dc;
+        } else if (k < KMAX-3) {
+            dc++;
+            if (c!='0') lnz = dc;
+            if (j) x[k] = x[k]*10 + c-'0';
+            else x[k] = c-'0';
+            if (++j==9) {
+                k++;
+                j=0;
+            }
+            gotdig=1;
+        } else {
+            dc++;
+            if (c!='0') {
+                lnz = (KMAX-4)*9;
+                x[KMAX-4] |= 1;
+            }
+        }
+    }
+    if (!gotrad) lrp=dc;
+
+    if (gotdig && (c|32)=='e') {
+        e10 = scanexp(f, pok);
+        if (e10 == LLONG_MIN) {
+            if (pok) {
+                shunget(f);
+            } else {
+                shlim(f, 0);
+                return 0;
+            }
+            e10 = 0;
+        }
+        lrp += e10;
+    } else if (c>=0) {
+        shunget(f);
+    }
+    if (!gotdig) {
+        errno = EINVAL;
+        shlim(f, 0);
+        return 0;
+    }
+
+    /* Handle zero specially to avoid nasty special cases later */
+    if (!x[0]) return sign * 0.0;
+
+    /* Optimize small integers (w/no exponent) and over/under-flow */
+    if (lrp==dc && dc<10 && (bits>30 || x[0]>>bits==0))
+        return sign * (double)x[0];
+    if (lrp > -emin/2) {
+        errno = ERANGE;
+        return sign * DBL_MAX * DBL_MAX;
+    }
+    if (lrp < emin-2*DBL_MANT_DIG) {
+        errno = ERANGE;
+        return sign * DBL_MIN * DBL_MIN;
+    }
+
+    /* Align incomplete final B1B digit */
+    if (j) {
+        for (; j<9; j++) x[k]*=10;
+        k++;
+        j=0;
+    }
+
+    a = 0;
+    z = k;
+    e2 = 0;
+    rp = lrp;
+
+    /* Optimize small to mid-size integers (even in exp. notation) */
+    if (lnz<9 && lnz<=rp && rp < 18) {
+        int bitlim;
+        if (rp == 9) return sign * (double)x[0];
+        if (rp < 9) return sign * (double)x[0] / p10s[8-rp];
+        bitlim = bits-3*(int)(rp-9);
+        if (bitlim>30 || x[0]>>bitlim==0)
+            return sign * (double)x[0] * p10s[rp-10];
+    }
+
+    /* Drop trailing zeros */
+    for (; !x[z-1]; z--);
+
+    /* Align radix point to B1B digit boundary */
+    if (rp % 9) {
+        int rpm9 = rp>=0 ? rp%9 : rp%9+9;
+        int p10 = p10s[8-rpm9];
+        uint32_t carry = 0;
+        for (k=a; k!=z; k++) {
+            uint32_t tmp = x[k] % p10;
+            x[k] = x[k]/p10 + carry;
+            carry = 1000000000/p10 * tmp;
+            if (k==a && !x[k]) {
+                a = (a+1 & MASK);
+                rp -= 9;
+            }
+        }
+        if (carry) x[z++] = carry;
+        rp += 9-rpm9;
+    }
+
+    /* Upscale until desired number of bits are left of radix point */
+    while (rp < 9*LD_B1B_DIG || (rp == 9*LD_B1B_DIG && x[a]<th[0])) {
+        uint32_t carry = 0;
+        e2 -= 29;
+        for (k=(z-1 & MASK); ; k=(k-1 & MASK)) {
+            uint64_t tmp = ((uint64_t)x[k] << 29) + carry;
+            if (tmp > 1000000000) {
+                carry = tmp / 1000000000;
+                x[k] = tmp % 1000000000;
+            } else {
+                carry = 0;
+                x[k] = tmp;
+            }
+            if (k==(z-1 & MASK) && k!=a && !x[k]) z = k;
+            if (k==a) break;
+        }
+        if (carry) {
+            rp += 9;
+            a = (a-1 & MASK);
+            if (a == z) {
+                z = (z-1 & MASK);
+                x[z-1 & MASK] |= x[z];
+            }
+            x[a] = carry;
+        }
+    }
+
+    /* Downscale until exactly number of bits are left of radix point */
+    for (;;) {
+        uint32_t carry = 0;
+        int sh = 1;
+        for (i=0; i<LD_B1B_DIG; i++) {
+            k = (a+i & MASK);
+            if (k == z || x[k] < th[i]) {
+                i=LD_B1B_DIG;
+                break;
+            }
+            if (x[a+i & MASK] > th[i]) break;
+        }
+        if (i==LD_B1B_DIG && rp==9*LD_B1B_DIG) break;
+        /* FIXME: find a way to compute optimal sh */
+        if (rp > 9+9*LD_B1B_DIG) sh = 9;
+        e2 += sh;
+        for (k=a; k!=z; k=(k+1 & MASK)) {
+            uint32_t tmp = x[k] & (1<<sh)-1;
+            x[k] = (x[k]>>sh) + carry;
+            carry = (1000000000>>sh) * tmp;
+            if (k==a && !x[k]) {
+                a = (a+1 & MASK);
+                i--;
+                rp -= 9;
+            }
+        }
+        if (carry) {
+            if ((z+1 & MASK) != a) {
+                x[z] = carry;
+                z = (z+1 & MASK);
+            } else x[z-1 & MASK] |= 1;
+        }
+    }
+
+    /* Assemble desired bits into floating point variable */
+    for (y=i=0; i<LD_B1B_DIG; i++) {
+        if ((a+i & MASK)==z) x[(z=(z+1 & MASK))-1] = 0;
+        y = 1000000000.0L * y + x[a+i & MASK];
+    }
+
+    y *= sign;
+
+    /* Limit precision for denormal results */
+    if (bits > DBL_MANT_DIG+e2-emin) {
+        bits = DBL_MANT_DIG+e2-emin;
+        if (bits<0) bits=0;
+        denormal = 1;
+    }
+
+    /* Calculate bias term to force rounding, move out lower bits */
+    if (bits < DBL_MANT_DIG) {
+        bias = copysign(scalbn(1, 2*DBL_MANT_DIG-bits-1), y);
+        frac = fmod(y, scalbn(1, DBL_MANT_DIG-bits));
+        y -= frac;
+        y += bias;
+    }
+
+    /* Process tail of decimal input so it can affect rounding */
+    if ((a+i & MASK) != z) {
+        uint32_t t = x[a+i & MASK];
+        if (t < 500000000 && (t || (a+i+1 & MASK) != z))
+            frac += 0.25*sign;
+        else if (t > 500000000)
+            frac += 0.75*sign;
+        else if (t == 500000000) {
+            if ((a+i+1 & MASK) == z)
+                frac += 0.5*sign;
+            else
+                frac += 0.75*sign;
+        }
+        if (DBL_MANT_DIG-bits >= 2 && !fmod(frac, 1))
+            frac++;
+    }
+
+    y += frac;
+    y -= bias;
+
+    if ((e2+DBL_MANT_DIG & INT_MAX) > emax-5) {
+        if (fabs(y) >= pow(2, DBL_MANT_DIG)) {
+            if (denormal && bits==DBL_MANT_DIG+e2-emin)
+                denormal = 0;
+            y *= 0.5;
+            e2++;
+        }
+        if (e2+DBL_MANT_DIG>emax || (denormal && frac))
+            errno = ERANGE;
+    }
+
+    return scalbn(y, e2);
+}
+
+static double hexfloat(FFFILE *f, int bits, int emin, int sign, int pok)
+{
+    uint32_t x = 0;
+    double y = 0;
+    double scale = 1;
+    double bias = 0;
+    int gottail = 0, gotrad = 0, gotdig = 0;
+    long long rp = 0;
+    long long dc = 0;
+    long long e2 = 0;
+    int d;
+    int c;
+
+    c = shgetc(f);
+
+    /* Skip leading zeros */
+    for (; c=='0'; c = shgetc(f))
+        gotdig = 1;
+
+    if (c=='.') {
+        gotrad = 1;
+        c = shgetc(f);
+        /* Count zeros after the radix point before significand */
+        for (rp=0; c=='0'; c = shgetc(f), rp--) gotdig = 1;
+    }
+
+    for (; c-'0'<10U || (c|32)-'a'<6U || c=='.'; c = shgetc(f)) {
+        if (c=='.') {
+            if (gotrad) break;
+            rp = dc;
+            gotrad = 1;
+        } else {
+            gotdig = 1;
+            if (c > '9') d = (c|32)+10-'a';
+            else d = c-'0';
+            if (dc<8) {
+                x = x*16 + d;
+            } else if (dc < DBL_MANT_DIG/4+1) {
+                y += d*(scale/=16);
+            } else if (d && !gottail) {
+                y += 0.5*scale;
+                gottail = 1;
+            }
+            dc++;
+        }
+    }
+    if (!gotdig) {
+        shunget(f);
+        if (pok) {
+            shunget(f);
+            if (gotrad) shunget(f);
+        } else {
+            shlim(f, 0);
+        }
+        return sign * 0.0;
+    }
+    if (!gotrad) rp = dc;
+    while (dc<8) x *= 16, dc++;
+    if ((c|32)=='p') {
+        e2 = scanexp(f, pok);
+        if (e2 == LLONG_MIN) {
+            if (pok) {
+                shunget(f);
+            } else {
+                shlim(f, 0);
+                return 0;
+            }
+            e2 = 0;
+        }
+    } else {
+        shunget(f);
+    }
+    e2 += 4*rp - 32;
+
+    if (!x) return sign * 0.0;
+    if (e2 > -emin) {
+        errno = ERANGE;
+        return sign * DBL_MAX * DBL_MAX;
+    }
+    if (e2 < emin-2*DBL_MANT_DIG) {
+        errno = ERANGE;
+        return sign * DBL_MIN * DBL_MIN;
+    }
+
+    while (x < 0x80000000) {
+        if (y>=0.5) {
+            x += x + 1;
+            y += y - 1;
+        } else {
+            x += x;
+            y += y;
+        }
+        e2--;
+    }
+
+    if (bits > 32+e2-emin) {
+        bits = 32+e2-emin;
+        if (bits<0) bits=0;
+    }
+
+    if (bits < DBL_MANT_DIG)
+        bias = copysign(scalbn(1, 32+DBL_MANT_DIG-bits-1), sign);
+
+    if (bits<32 && y && !(x&1)) x++, y=0;
+
+    y = bias + sign*(double)x + sign*y;
+    y -= bias;
+
+    if (!y) errno = ERANGE;
+
+    return scalbn(y, e2);
+}
+
+static double fffloatscan(FFFILE *f, int prec, int pok)
+{
+    int sign = 1;
+    size_t i;
+    int bits;
+    int emin;
+    int c;
+
+    switch (prec) {
+    case 0:
+        bits = FLT_MANT_DIG;
+        emin = FLT_MIN_EXP-bits;
+        break;
+    case 1:
+        bits = DBL_MANT_DIG;
+        emin = DBL_MIN_EXP-bits;
+        break;
+    case 2:
+        bits = DBL_MANT_DIG;
+        emin = DBL_MIN_EXP-bits;
+        break;
+    default:
+        return 0;
+    }
+
+    while (av_isspace((c = shgetc(f))));
+
+    if (c=='+' || c=='-') {
+        sign -= 2*(c=='-');
+        c = shgetc(f);
+    }
+
+    for (i=0; i<8 && (c|32)=="infinity"[i]; i++)
+        if (i<7) c = shgetc(f);
+    if (i==3 || i==8 || (i>3 && pok)) {
+        if (i!=8) {
+            shunget(f);
+            if (pok) for (; i>3; i--) shunget(f);
+        }
+        return sign * INFINITY;
+    }
+    if (!i) for (i=0; i<3 && (c|32)=="nan"[i]; i++)
+        if (i<2) c = shgetc(f);
+    if (i==3) {
+        if (shgetc(f) != '(') {
+            shunget(f);
+            return NAN;
+        }
+        for (i=1; ; i++) {
+            c = shgetc(f);
+            if (c-'0'<10U || c-'A'<26U || c-'a'<26U || c=='_')
+                continue;
+            if (c==')') return NAN;
+            shunget(f);
+            if (!pok) {
+                errno = EINVAL;
+                shlim(f, 0);
+                return 0;
+            }
+            while (i--) shunget(f);
+            return NAN;
+        }
+    }
+
+    if (i) {
+        shunget(f);
+        errno = EINVAL;
+        shlim(f, 0);
+        return 0;
+    }
+
+    if (c=='0') {
+        c = shgetc(f);
+        if ((c|32) == 'x')
+            return hexfloat(f, bits, emin, sign, pok);
+        shunget(f);
+        c = '0';
+    }
+
+    return decfloat(f, c, bits, emin, sign, pok);
+}
+
+static void *arg_n(va_list ap, unsigned int n)
+{
+    void *p;
+    unsigned int i;
+    va_list ap2;
+    va_copy(ap2, ap);
+    for (i=n; i>1; i--) va_arg(ap2, void *);
+    p = va_arg(ap2, void *);
+    va_end(ap2);
+    return p;
+}
+
+static void store_int(void *dest, int size, unsigned long long i)
+{
+    if (!dest) return;
+    switch (size) {
+    case SIZE_hh:
+        *(char *)dest = i;
+        break;
+    case SIZE_h:
+        *(short *)dest = i;
+        break;
+    case SIZE_def:
+        *(int *)dest = i;
+        break;
+    case SIZE_l:
+        *(long *)dest = i;
+        break;
+    case SIZE_ll:
+        *(long long *)dest = i;
+        break;
+    }
+}
+
+static int ff_vfscanf(FFFILE *f, const char *fmt, va_list ap)
+{
+    int width;
+    int size;
+    int base;
+    const unsigned char *p;
+    int c, t;
+    char *s;
+    void *dest=NULL;
+    int invert;
+    int matches=0;
+    unsigned long long x;
+    double y;
+    ptrdiff_t pos = 0;
+    unsigned char scanset[257];
+    size_t i;
+
+    for (p=(const unsigned char *)fmt; *p; p++) {
+
+        if (av_isspace(*p)) {
+            while (av_isspace(p[1])) p++;
+            shlim(f, 0);
+            while (av_isspace(shgetc(f)));
+            shunget(f);
+            pos += shcnt(f);
+            continue;
+        }
+        if (*p != '%' || p[1] == '%') {
+            shlim(f, 0);
+            if (*p == '%') {
+                p++;
+                while (av_isspace((c=shgetc(f))));
+            } else {
+                c = shgetc(f);
+            }
+            if (c!=*p) {
+                shunget(f);
+                if (c<0) goto input_fail;
+                goto match_fail;
+            }
+            pos += shcnt(f);
+            continue;
+        }
+
+        p++;
+        if (*p=='*') {
+            dest = 0; p++;
+        } else if (av_isdigit(*p) && p[1]=='$') {
+            dest = arg_n(ap, *p-'0'); p+=2;
+        } else {
+            dest = va_arg(ap, void *);
+        }
+
+        for (width=0; av_isdigit(*p); p++) {
+            width = 10*width + *p - '0';
+        }
+
+        if (*p=='m') {
+            s = 0;
+            p++;
+        }
+
+        size = SIZE_def;
+        switch (*p++) {
+        case 'h':
+            if (*p == 'h') p++, size = SIZE_hh;
+            else size = SIZE_h;
+            break;
+        case 'l':
+            if (*p == 'l') p++, size = SIZE_ll;
+            else size = SIZE_l;
+            break;
+        case 'j':
+            size = SIZE_ll;
+            break;
+        case 'z':
+        case 't':
+            size = SIZE_l;
+            break;
+        case 'L':
+            size = SIZE_L;
+            break;
+        case 'd': case 'i': case 'o': case 'u': case 'x':
+        case 'a': case 'e': case 'f': case 'g':
+        case 'A': case 'E': case 'F': case 'G': case 'X':
+        case 's': case 'c': case '[':
+        case 'S': case 'C':
+        case 'p': case 'n':
+            p--;
+            break;
+        default:
+            goto fmt_fail;
+        }
+
+        t = *p;
+
+        /* C or S */
+        if ((t&0x2f) == 3) {
+            t |= 32;
+            size = SIZE_l;
+        }
+
+        switch (t) {
+            case 'c':
+                if (width < 1) width = 1;
+            case '[':
+                break;
+            case 'n':
+                store_int(dest, size, pos);
+                /* do not increment match count, etc! */
+                continue;
+            default:
+                shlim(f, 0);
+                while (av_isspace(shgetc(f)));
+                shunget(f);
+                pos += shcnt(f);
+        }
+
+        shlim(f, width);
+        if (shgetc(f) < 0) goto input_fail;
+        shunget(f);
+
+        switch (t) {
+            case 's':
+            case 'c':
+            case '[':
+                if (t == 'c' || t == 's') {
+                    memset(scanset, -1, sizeof scanset);
+                    scanset[0] = 0;
+                    if (t == 's') {
+                        scanset[1 + '\t'] = 0;
+                        scanset[1 + '\n'] = 0;
+                        scanset[1 + '\v'] = 0;
+                        scanset[1 + '\f'] = 0;
+                        scanset[1 + '\r'] = 0;
+                        scanset[1 + ' ' ] = 0;
+                    }
+                } else {
+                    if (*++p == '^') p++, invert = 1;
+                    else invert = 0;
+                    memset(scanset, invert, sizeof scanset);
+                    scanset[0] = 0;
+                    if (*p == '-') p++, scanset[1+'-'] = 1-invert;
+                    else if (*p == ']') p++, scanset[1+']'] = 1-invert;
+                    for (; *p != ']'; p++) {
+                        if (!*p) goto fmt_fail;
+                        if (*p=='-' && p[1] && p[1] != ']')
+                            for (c=p++[-1]; c<*p; c++)
+                                scanset[1+c] = 1-invert;
+                        scanset[1+*p] = 1-invert;
+                    }
+                }
+                s = 0;
+                i = 0;
+                if ((s = dest)) {
+                    while (scanset[(c=shgetc(f))+1])
+                        s[i++] = c;
+                } else {
+                    while (scanset[(c=shgetc(f))+1]);
+                }
+                shunget(f);
+                if (!shcnt(f)) goto match_fail;
+                if (t == 'c' && shcnt(f) != width) goto match_fail;
+                if (t != 'c') {
+                    if (s) s[i] = 0;
+                }
+                break;
+            case 'p':
+            case 'X':
+            case 'x':
+                base = 16;
+                goto int_common;
+            case 'o':
+                base = 8;
+                goto int_common;
+            case 'd':
+            case 'u':
+                base = 10;
+                goto int_common;
+            case 'i':
+                base = 0;
+int_common:
+                x = ffintscan(f, base, 0, ULLONG_MAX);
+                if (!shcnt(f))
+                    goto match_fail;
+                if (t=='p' && dest)
+                    *(void **)dest = (void *)(uintptr_t)x;
+                else
+                    store_int(dest, size, x);
+                break;
+            case 'a': case 'A':
+            case 'e': case 'E':
+            case 'f': case 'F':
+            case 'g': case 'G':
+                y = fffloatscan(f, size, 0);
+                if (!shcnt(f))
+                    goto match_fail;
+                if (dest) {
+                    switch (size) {
+                    case SIZE_def:
+                        *(float *)dest = y;
+                        break;
+                    case SIZE_l:
+                        *(double *)dest = y;
+                        break;
+                    case SIZE_L:
+                        *(double *)dest = y;
+                        break;
+                    }
+                }
+                break;
+        }
+
+        pos += shcnt(f);
+        if (dest) matches++;
+    }
+    if (0) {
+fmt_fail:
+input_fail:
+        if (!matches) matches--;
+    }
+match_fail:
+    return matches;
+}
+
+static int ff_vsscanf(const char *s, const char *fmt, va_list ap)
+{
+    FFFILE f = {
+        .buf = (void *)s, .cookie = (void *)s,
+        .read = ffstring_read,
+    };
+
+    return ff_vfscanf(&f, fmt, ap);
+}
+
+int av_sscanf(const char *string, const char *format, ...)
+{
+    int ret;
+    va_list ap;
+    va_start(ap, format);
+    ret = ff_vsscanf(string, format, ap);
+    va_end(ap);
+    return ret;
+}

ffmpeg/libavutil/avstring.c

@@ -0,0 +1,465 @@
+/*
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ * Copyright (c) 2007 Mans Rullgard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <limits.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "config.h"
+#include "mem.h"
+#include "avassert.h"
+#include "avstring.h"
+#include "bprint.h"
+#include "error.h"
+#include "macros.h"
+
+int av_strstart(const char *str, const char *pfx, const char **ptr)
+{
+    while (*pfx && *pfx == *str) {
+        pfx++;
+        str++;
+    }
+    if (!*pfx && ptr)
+        *ptr = str;
+    return !*pfx;
+}
+
+int av_stristart(const char *str, const char *pfx, const char **ptr)
+{
+    while (*pfx && av_toupper((unsigned)*pfx) == av_toupper((unsigned)*str)) {
+        pfx++;
+        str++;
+    }
+    if (!*pfx && ptr)
+        *ptr = str;
+    return !*pfx;
+}
+
+char *av_stristr(const char *s1, const char *s2)
+{
+    if (!*s2)
+        return (char*)(intptr_t)s1;
+
+    do
+        if (av_stristart(s1, s2, NULL))
+            return (char*)(intptr_t)s1;
+    while (*s1++);
+
+    return NULL;
+}
+
+char *av_strnstr(const char *haystack, const char *needle, size_t hay_length)
+{
+    size_t needle_len = strlen(needle);
+    if (!needle_len)
+        return (char*)haystack;
+    while (hay_length >= needle_len) {
+        hay_length--;
+        if (!memcmp(haystack, needle, needle_len))
+            return (char*)haystack;
+        haystack++;
+    }
+    return NULL;
+}
+
+size_t av_strlcpy(char *dst, const char *src, size_t size)
+{
+    size_t len = 0;
+    while (++len < size && *src)
+        *dst++ = *src++;
+    if (len <= size)
+        *dst = 0;
+    return len + strlen(src) - 1;
+}
+
+size_t av_strlcat(char *dst, const char *src, size_t size)
+{
+    size_t len = strlen(dst);
+    if (size <= len + 1)
+        return len + strlen(src);
+    return len + av_strlcpy(dst + len, src, size - len);
+}
+
+size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...)
+{
+    size_t len = strlen(dst);
+    va_list vl;
+
+    va_start(vl, fmt);
+    len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);
+    va_end(vl);
+
+    return len;
+}
+
+char *av_asprintf(const char *fmt, ...)
+{
+    char *p = NULL;
+    va_list va;
+    int len;
+
+    va_start(va, fmt);
+    len = vsnprintf(NULL, 0, fmt, va);
+    va_end(va);
+    if (len < 0)
+        goto end;
+
+    p = av_malloc(len + 1);
+    if (!p)
+        goto end;
+
+    va_start(va, fmt);
+    len = vsnprintf(p, len + 1, fmt, va);
+    va_end(va);
+    if (len < 0)
+        av_freep(&p);
+
+end:
+    return p;
+}
+
+#define WHITESPACES " \n\t\r"
+
+char *av_get_token(const char **buf, const char *term)
+{
+    char *out     = av_realloc(NULL, strlen(*buf) + 1);
+    char *ret     = out, *end = out;
+    const char *p = *buf;
+    if (!out)
+        return NULL;
+    p += strspn(p, WHITESPACES);
+
+    while (*p && !strspn(p, term)) {
+        char c = *p++;
+        if (c == '\\' && *p) {
+            *out++ = *p++;
+            end    = out;
+        } else if (c == '\'') {
+            while (*p && *p != '\'')
+                *out++ = *p++;
+            if (*p) {
+                p++;
+                end = out;
+            }
+        } else {
+            *out++ = c;
+        }
+    }
+
+    do
+        *out-- = 0;
+    while (out >= end && strspn(out, WHITESPACES));
+
+    *buf = p;
+
+    char *small_ret = av_realloc(ret, out - ret + 2);
+    return small_ret ? small_ret : ret;
+}
+
+char *av_strtok(char *s, const char *delim, char **saveptr)
+{
+    char *tok;
+
+    if (!s && !(s = *saveptr))
+        return NULL;
+
+    /* skip leading delimiters */
+    s += strspn(s, delim);
+
+    /* s now points to the first non delimiter char, or to the end of the string */
+    if (!*s) {
+        *saveptr = NULL;
+        return NULL;
+    }
+    tok = s++;
+
+    /* skip non delimiters */
+    s += strcspn(s, delim);
+    if (*s) {
+        *s = 0;
+        *saveptr = s+1;
+    } else {
+        *saveptr = NULL;
+    }
+
+    return tok;
+}
+
+int av_strcasecmp(const char *a, const char *b)
+{
+    uint8_t c1, c2;
+    do {
+        c1 = av_tolower(*a++);
+        c2 = av_tolower(*b++);
+    } while (c1 && c1 == c2);
+    return c1 - c2;
+}
+
+int av_strncasecmp(const char *a, const char *b, size_t n)
+{
+    uint8_t c1, c2;
+    if (n <= 0)
+        return 0;
+    do {
+        c1 = av_tolower(*a++);
+        c2 = av_tolower(*b++);
+    } while (--n && c1 && c1 == c2);
+    return c1 - c2;
+}
+
+char *av_strireplace(const char *str, const char *from, const char *to)
+{
+    char *ret = NULL;
+    const char *pstr2, *pstr = str;
+    size_t tolen = strlen(to), fromlen = strlen(from);
+    AVBPrint pbuf;
+
+    av_bprint_init(&pbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
+    while ((pstr2 = av_stristr(pstr, from))) {
+        av_bprint_append_data(&pbuf, pstr, pstr2 - pstr);
+        pstr = pstr2 + fromlen;
+        av_bprint_append_data(&pbuf, to, tolen);
+    }
+    av_bprint_append_data(&pbuf, pstr, strlen(pstr));
+    if (!av_bprint_is_complete(&pbuf)) {
+        av_bprint_finalize(&pbuf, NULL);
+    } else {
+        av_bprint_finalize(&pbuf, &ret);
+    }
+
+    return ret;
+}
+
+const char *av_basename(const char *path)
+{
+    char *p;
+#if HAVE_DOS_PATHS
+    char *q, *d;
+#endif
+
+    if (!path || *path == '\0')
+        return ".";
+
+    p = strrchr(path, '/');
+#if HAVE_DOS_PATHS
+    q = strrchr(path, '\\');
+    d = strchr(path, ':');
+    p = FFMAX3(p, q, d);
+#endif
+
+    if (!p)
+        return path;
+
+    return p + 1;
+}
+
+const char *av_dirname(char *path)
+{
+    char *p = path ? strrchr(path, '/') : NULL;
+
+#if HAVE_DOS_PATHS
+    char *q = path ? strrchr(path, '\\') : NULL;
+    char *d = path ? strchr(path, ':')  : NULL;
+
+    d = d ? d + 1 : d;
+
+    p = FFMAX3(p, q, d);
+#endif
+
+    if (!p)
+        return ".";
+
+    *p = '\0';
+
+    return path;
+}
+
+char *av_append_path_component(const char *path, const char *component)
+{
+    size_t p_len, c_len;
+    char *fullpath;
+
+    if (!path)
+        return av_strdup(component);
+    if (!component)
+        return av_strdup(path);
+
+    p_len = strlen(path);
+    c_len = strlen(component);
+    if (p_len > SIZE_MAX - c_len || p_len + c_len > SIZE_MAX - 2)
+        return NULL;
+    fullpath = av_malloc(p_len + c_len + 2);
+    if (fullpath) {
+        if (p_len) {
+            av_strlcpy(fullpath, path, p_len + 1);
+            if (c_len) {
+                if (fullpath[p_len - 1] != '/' && component[0] != '/')
+                    fullpath[p_len++] = '/';
+                else if (fullpath[p_len - 1] == '/' && component[0] == '/')
+                    p_len--;
+            }
+        }
+        av_strlcpy(&fullpath[p_len], component, c_len + 1);
+        fullpath[p_len + c_len] = 0;
+    }
+    return fullpath;
+}
+
+int av_escape(char **dst, const char *src, const char *special_chars,
+              enum AVEscapeMode mode, int flags)
+{
+    AVBPrint dstbuf;
+    int ret;
+
+    av_bprint_init(&dstbuf, 1, INT_MAX); /* (int)dstbuf.len must be >= 0 */
+    av_bprint_escape(&dstbuf, src, special_chars, mode, flags);
+
+    if (!av_bprint_is_complete(&dstbuf)) {
+        av_bprint_finalize(&dstbuf, NULL);
+        return AVERROR(ENOMEM);
+    }
+    if ((ret = av_bprint_finalize(&dstbuf, dst)) < 0)
+        return ret;
+    return dstbuf.len;
+}
+
+int av_match_name(const char *name, const char *names)
+{
+    const char *p;
+    size_t len, namelen;
+
+    if (!name || !names)
+        return 0;
+
+    namelen = strlen(name);
+    while (*names) {
+        int negate = '-' == *names;
+        p = strchr(names, ',');
+        if (!p)
+            p = names + strlen(names);
+        names += negate;
+        len = FFMAX(p - names, namelen);
+        if (!av_strncasecmp(name, names, len) || !strncmp("ALL", names, FFMAX(3, p - names)))
+            return !negate;
+        names = p + (*p == ',');
+    }
+    return 0;
+}
+
+int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
+                   unsigned int flags)
+{
+    const uint8_t *p = *bufp;
+    uint32_t top;
+    uint64_t code;
+    int ret = 0, tail_len;
+    uint32_t overlong_encoding_mins[6] = {
+        0x00000000, 0x00000080, 0x00000800, 0x00010000, 0x00200000, 0x04000000,
+    };
+
+    if (p >= buf_end)
+        return 0;
+
+    code = *p++;
+
+    /* first sequence byte starts with 10, or is 1111-1110 or 1111-1111,
+       which is not admitted */
+    if ((code & 0xc0) == 0x80 || code >= 0xFE) {
+        ret = AVERROR(EILSEQ);
+        goto end;
+    }
+    top = (code & 128) >> 1;
+
+    tail_len = 0;
+    while (code & top) {
+        int tmp;
+        tail_len++;
+        if (p >= buf_end) {
+            (*bufp) ++;
+            return AVERROR(EILSEQ); /* incomplete sequence */
+        }
+
+        /* we assume the byte to be in the form 10xx-xxxx */
+        tmp = *p++ - 128;   /* strip leading 1 */
+        if (tmp>>6) {
+            (*bufp) ++;
+            return AVERROR(EILSEQ);
+        }
+        code = (code<<6) + tmp;
+        top <<= 5;
+    }
+    code &= (top << 1) - 1;
+
+    /* check for overlong encodings */
+    av_assert0(tail_len <= 5);
+    if (code < overlong_encoding_mins[tail_len]) {
+        ret = AVERROR(EILSEQ);
+        goto end;
+    }
+
+    if (code >= 1U<<31) {
+        ret = AVERROR(EILSEQ);  /* out-of-range value */
+        goto end;
+    }
+
+    *codep = code;
+
+    if (code > 0x10FFFF &&
+        !(flags & AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES))
+        ret = AVERROR(EILSEQ);
+    if (code < 0x20 && code != 0x9 && code != 0xA && code != 0xD &&
+        flags & AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES)
+        ret = AVERROR(EILSEQ);
+    if (code >= 0xD800 && code <= 0xDFFF &&
+        !(flags & AV_UTF8_FLAG_ACCEPT_SURROGATES))
+        ret = AVERROR(EILSEQ);
+    if ((code == 0xFFFE || code == 0xFFFF) &&
+        !(flags & AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS))
+        ret = AVERROR(EILSEQ);
+
+end:
+    *bufp = p;
+    return ret;
+}
+
+int av_match_list(const char *name, const char *list, char separator)
+{
+    const char *p, *q;
+
+    for (p = name; p && *p; ) {
+        for (q = list; q && *q; ) {
+            int k;
+            for (k = 0; p[k] == q[k] || (p[k]*q[k] == 0 && p[k]+q[k] == separator); k++)
+                if (k && (!p[k] || p[k] == separator))
+                    return 1;
+            q = strchr(q, separator);
+            if(q)
+                q++;
+        }
+        p = strchr(p, separator);
+        if (p)
+            p++;
+    }
+
+    return 0;
+}

ffmpeg/libavutil/avstring.h

@@ -0,0 +1,428 @@
+/*
+ * Copyright (c) 2007 Mans Rullgard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AVSTRING_H
+#define AVUTIL_AVSTRING_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include "attributes.h"
+
+/**
+ * @addtogroup lavu_string
+ * @{
+ */
+
+/**
+ * Return non-zero if pfx is a prefix of str. If it is, *ptr is set to
+ * the address of the first character in str after the prefix.
+ *
+ * @param str input string
+ * @param pfx prefix to test
+ * @param ptr updated if the prefix is matched inside str
+ * @return non-zero if the prefix matches, zero otherwise
+ */
+int av_strstart(const char *str, const char *pfx, const char **ptr);
+
+/**
+ * Return non-zero if pfx is a prefix of str independent of case. If
+ * it is, *ptr is set to the address of the first character in str
+ * after the prefix.
+ *
+ * @param str input string
+ * @param pfx prefix to test
+ * @param ptr updated if the prefix is matched inside str
+ * @return non-zero if the prefix matches, zero otherwise
+ */
+int av_stristart(const char *str, const char *pfx, const char **ptr);
+
+/**
+ * Locate the first case-independent occurrence in the string haystack
+ * of the string needle.  A zero-length string needle is considered to
+ * match at the start of haystack.
+ *
+ * This function is a case-insensitive version of the standard strstr().
+ *
+ * @param haystack string to search in
+ * @param needle   string to search for
+ * @return         pointer to the located match within haystack
+ *                 or a null pointer if no match
+ */
+char *av_stristr(const char *haystack, const char *needle);
+
+/**
+ * Locate the first occurrence of the string needle in the string haystack
+ * where not more than hay_length characters are searched. A zero-length
+ * string needle is considered to match at the start of haystack.
+ *
+ * This function is a length-limited version of the standard strstr().
+ *
+ * @param haystack   string to search in
+ * @param needle     string to search for
+ * @param hay_length length of string to search in
+ * @return           pointer to the located match within haystack
+ *                   or a null pointer if no match
+ */
+char *av_strnstr(const char *haystack, const char *needle, size_t hay_length);
+
+/**
+ * Copy the string src to dst, but no more than size - 1 bytes, and
+ * null-terminate dst.
+ *
+ * This function is the same as BSD strlcpy().
+ *
+ * @param dst destination buffer
+ * @param src source string
+ * @param size size of destination buffer
+ * @return the length of src
+ *
+ * @warning since the return value is the length of src, src absolutely
+ * _must_ be a properly 0-terminated string, otherwise this will read beyond
+ * the end of the buffer and possibly crash.
+ */
+size_t av_strlcpy(char *dst, const char *src, size_t size);
+
+/**
+ * Append the string src to the string dst, but to a total length of
+ * no more than size - 1 bytes, and null-terminate dst.
+ *
+ * This function is similar to BSD strlcat(), but differs when
+ * size <= strlen(dst).
+ *
+ * @param dst destination buffer
+ * @param src source string
+ * @param size size of destination buffer
+ * @return the total length of src and dst
+ *
+ * @warning since the return value use the length of src and dst, these
+ * absolutely _must_ be a properly 0-terminated strings, otherwise this
+ * will read beyond the end of the buffer and possibly crash.
+ */
+size_t av_strlcat(char *dst, const char *src, size_t size);
+
+/**
+ * Append output to a string, according to a format. Never write out of
+ * the destination buffer, and always put a terminating 0 within
+ * the buffer.
+ * @param dst destination buffer (string to which the output is
+ *  appended)
+ * @param size total size of the destination buffer
+ * @param fmt printf-compatible format string, specifying how the
+ *  following parameters are used
+ * @return the length of the string that would have been generated
+ *  if enough space had been available
+ */
+size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...) av_printf_format(3, 4);
+
+/**
+ * Get the count of continuous non zero chars starting from the beginning.
+ *
+ * @param s   the string whose length to count
+ * @param len maximum number of characters to check in the string, that
+ *            is the maximum value which is returned by the function
+ */
+static inline size_t av_strnlen(const char *s, size_t len)
+{
+    size_t i;
+    for (i = 0; i < len && s[i]; i++)
+        ;
+    return i;
+}
+
+/**
+ * Print arguments following specified format into a large enough auto
+ * allocated buffer. It is similar to GNU asprintf().
+ * @param fmt printf-compatible format string, specifying how the
+ *            following parameters are used.
+ * @return the allocated string
+ * @note You have to free the string yourself with av_free().
+ */
+char *av_asprintf(const char *fmt, ...) av_printf_format(1, 2);
+
+/**
+ * Unescape the given string until a non escaped terminating char,
+ * and return the token corresponding to the unescaped string.
+ *
+ * The normal \ and ' escaping is supported. Leading and trailing
+ * whitespaces are removed, unless they are escaped with '\' or are
+ * enclosed between ''.
+ *
+ * @param buf the buffer to parse, buf will be updated to point to the
+ * terminating char
+ * @param term a 0-terminated list of terminating chars
+ * @return the malloced unescaped string, which must be av_freed by
+ * the user, NULL in case of allocation failure
+ */
+char *av_get_token(const char **buf, const char *term);
+
+/**
+ * Split the string into several tokens which can be accessed by
+ * successive calls to av_strtok().
+ *
+ * A token is defined as a sequence of characters not belonging to the
+ * set specified in delim.
+ *
+ * On the first call to av_strtok(), s should point to the string to
+ * parse, and the value of saveptr is ignored. In subsequent calls, s
+ * should be NULL, and saveptr should be unchanged since the previous
+ * call.
+ *
+ * This function is similar to strtok_r() defined in POSIX.1.
+ *
+ * @param s the string to parse, may be NULL
+ * @param delim 0-terminated list of token delimiters, must be non-NULL
+ * @param saveptr user-provided pointer which points to stored
+ * information necessary for av_strtok() to continue scanning the same
+ * string. saveptr is updated to point to the next character after the
+ * first delimiter found, or to NULL if the string was terminated
+ * @return the found token, or NULL when no token is found
+ */
+char *av_strtok(char *s, const char *delim, char **saveptr);
+
+/**
+ * Locale-independent conversion of ASCII isdigit.
+ */
+static inline av_const int av_isdigit(int c)
+{
+    return c >= '0' && c <= '9';
+}
+
+/**
+ * Locale-independent conversion of ASCII isgraph.
+ */
+static inline av_const int av_isgraph(int c)
+{
+    return c > 32 && c < 127;
+}
+
+/**
+ * Locale-independent conversion of ASCII isspace.
+ */
+static inline av_const int av_isspace(int c)
+{
+    return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' ||
+           c == '\v';
+}
+
+/**
+ * Locale-independent conversion of ASCII characters to uppercase.
+ */
+static inline av_const int av_toupper(int c)
+{
+    if (c >= 'a' && c <= 'z')
+        c ^= 0x20;
+    return c;
+}
+
+/**
+ * Locale-independent conversion of ASCII characters to lowercase.
+ */
+static inline av_const int av_tolower(int c)
+{
+    if (c >= 'A' && c <= 'Z')
+        c ^= 0x20;
+    return c;
+}
+
+/**
+ * Locale-independent conversion of ASCII isxdigit.
+ */
+static inline av_const int av_isxdigit(int c)
+{
+    c = av_tolower(c);
+    return av_isdigit(c) || (c >= 'a' && c <= 'f');
+}
+
+/**
+ * Locale-independent case-insensitive compare.
+ * @note This means only ASCII-range characters are case-insensitive
+ */
+int av_strcasecmp(const char *a, const char *b);
+
+/**
+ * Locale-independent case-insensitive compare.
+ * @note This means only ASCII-range characters are case-insensitive
+ */
+int av_strncasecmp(const char *a, const char *b, size_t n);
+
+/**
+ * Locale-independent strings replace.
+ * @note This means only ASCII-range characters are replaced.
+ */
+char *av_strireplace(const char *str, const char *from, const char *to);
+
+/**
+ * Thread safe basename.
+ * @param path the string to parse, on DOS both \ and / are considered separators.
+ * @return pointer to the basename substring.
+ * If path does not contain a slash, the function returns a copy of path.
+ * If path is a NULL pointer or points to an empty string, a pointer
+ * to a string "." is returned.
+ */
+const char *av_basename(const char *path);
+
+/**
+ * Thread safe dirname.
+ * @param path the string to parse, on DOS both \ and / are considered separators.
+ * @return A pointer to a string that's the parent directory of path.
+ * If path is a NULL pointer or points to an empty string, a pointer
+ * to a string "." is returned.
+ * @note the function may modify the contents of the path, so copies should be passed.
+ */
+const char *av_dirname(char *path);
+
+/**
+ * Match instances of a name in a comma-separated list of names.
+ * List entries are checked from the start to the end of the names list,
+ * the first match ends further processing. If an entry prefixed with '-'
+ * matches, then 0 is returned. The "ALL" list entry is considered to
+ * match all names.
+ *
+ * @param name  Name to look for.
+ * @param names List of names.
+ * @return 1 on match, 0 otherwise.
+ */
+int av_match_name(const char *name, const char *names);
+
+/**
+ * Append path component to the existing path.
+ * Path separator '/' is placed between when needed.
+ * Resulting string have to be freed with av_free().
+ * @param path      base path
+ * @param component component to be appended
+ * @return new path or NULL on error.
+ */
+char *av_append_path_component(const char *path, const char *component);
+
+enum AVEscapeMode {
+    AV_ESCAPE_MODE_AUTO,      ///< Use auto-selected escaping mode.
+    AV_ESCAPE_MODE_BACKSLASH, ///< Use backslash escaping.
+    AV_ESCAPE_MODE_QUOTE,     ///< Use single-quote escaping.
+    AV_ESCAPE_MODE_XML,       ///< Use XML non-markup character data escaping.
+};
+
+/**
+ * Consider spaces special and escape them even in the middle of the
+ * string.
+ *
+ * This is equivalent to adding the whitespace characters to the special
+ * characters lists, except it is guaranteed to use the exact same list
+ * of whitespace characters as the rest of libavutil.
+ */
+#define AV_ESCAPE_FLAG_WHITESPACE (1 << 0)
+
+/**
+ * Escape only specified special characters.
+ * Without this flag, escape also any characters that may be considered
+ * special by av_get_token(), such as the single quote.
+ */
+#define AV_ESCAPE_FLAG_STRICT (1 << 1)
+
+/**
+ * Within AV_ESCAPE_MODE_XML, additionally escape single quotes for single
+ * quoted attributes.
+ */
+#define AV_ESCAPE_FLAG_XML_SINGLE_QUOTES (1 << 2)
+
+/**
+ * Within AV_ESCAPE_MODE_XML, additionally escape double quotes for double
+ * quoted attributes.
+ */
+#define AV_ESCAPE_FLAG_XML_DOUBLE_QUOTES (1 << 3)
+
+
+/**
+ * Escape string in src, and put the escaped string in an allocated
+ * string in *dst, which must be freed with av_free().
+ *
+ * @param dst           pointer where an allocated string is put
+ * @param src           string to escape, must be non-NULL
+ * @param special_chars string containing the special characters which
+ *                      need to be escaped, can be NULL
+ * @param mode          escape mode to employ, see AV_ESCAPE_MODE_* macros.
+ *                      Any unknown value for mode will be considered equivalent to
+ *                      AV_ESCAPE_MODE_BACKSLASH, but this behaviour can change without
+ *                      notice.
+ * @param flags         flags which control how to escape, see AV_ESCAPE_FLAG_ macros
+ * @return the length of the allocated string, or a negative error code in case of error
+ * @see av_bprint_escape()
+ */
+av_warn_unused_result
+int av_escape(char **dst, const char *src, const char *special_chars,
+              enum AVEscapeMode mode, int flags);
+
+#define AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES          1 ///< accept codepoints over 0x10FFFF
+#define AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS             2 ///< accept non-characters - 0xFFFE and 0xFFFF
+#define AV_UTF8_FLAG_ACCEPT_SURROGATES                 4 ///< accept UTF-16 surrogates codes
+#define AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES 8 ///< exclude control codes not accepted by XML
+
+#define AV_UTF8_FLAG_ACCEPT_ALL \
+    AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES|AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS|AV_UTF8_FLAG_ACCEPT_SURROGATES
+
+/**
+ * Read and decode a single UTF-8 code point (character) from the
+ * buffer in *buf, and update *buf to point to the next byte to
+ * decode.
+ *
+ * In case of an invalid byte sequence, the pointer will be updated to
+ * the next byte after the invalid sequence and the function will
+ * return an error code.
+ *
+ * Depending on the specified flags, the function will also fail in
+ * case the decoded code point does not belong to a valid range.
+ *
+ * @note For speed-relevant code a carefully implemented use of
+ * GET_UTF8() may be preferred.
+ *
+ * @param codep   pointer used to return the parsed code in case of success.
+ *                The value in *codep is set even in case the range check fails.
+ * @param bufp    pointer to the address the first byte of the sequence
+ *                to decode, updated by the function to point to the
+ *                byte next after the decoded sequence
+ * @param buf_end pointer to the end of the buffer, points to the next
+ *                byte past the last in the buffer. This is used to
+ *                avoid buffer overreads (in case of an unfinished
+ *                UTF-8 sequence towards the end of the buffer).
+ * @param flags   a collection of AV_UTF8_FLAG_* flags
+ * @return >= 0 in case a sequence was successfully read, a negative
+ * value in case of invalid sequence
+ */
+av_warn_unused_result
+int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
+                   unsigned int flags);
+
+/**
+ * Check if a name is in a list.
+ * @returns 0 if not found, or the 1 based index where it has been found in the
+ *            list.
+ */
+int av_match_list(const char *name, const char *list, char separator);
+
+/**
+ * See libc sscanf manual for more information.
+ * Locale-independent sscanf implementation.
+ */
+int av_sscanf(const char *string, const char *format, ...) av_scanf_format(2, 3);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_AVSTRING_H */

ffmpeg/libavutil/avutil.h

@@ -0,0 +1,364 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AVUTIL_H
+#define AVUTIL_AVUTIL_H
+
+/**
+ * @file
+ * @ingroup lavu
+ * Convenience header that includes @ref lavu "libavutil"'s core.
+ */
+
+/**
+ * @mainpage
+ *
+ * @section ffmpeg_intro Introduction
+ *
+ * This document describes the usage of the different libraries
+ * provided by FFmpeg.
+ *
+ * @li @ref libavc "libavcodec" encoding/decoding library
+ * @li @ref lavfi "libavfilter" graph-based frame editing library
+ * @li @ref libavf "libavformat" I/O and muxing/demuxing library
+ * @li @ref lavd "libavdevice" special devices muxing/demuxing library
+ * @li @ref lavu "libavutil" common utility library
+ * @li @ref lswr "libswresample" audio resampling, format conversion and mixing
+ * @li @ref libsws "libswscale" color conversion and scaling library
+ *
+ * @section ffmpeg_versioning Versioning and compatibility
+ *
+ * Each of the FFmpeg libraries contains a version.h header, which defines a
+ * major, minor and micro version number with the
+ * <em>LIBRARYNAME_VERSION_{MAJOR,MINOR,MICRO}</em> macros. The major version
+ * number is incremented with backward incompatible changes - e.g. removing
+ * parts of the public API, reordering public struct members, etc. The minor
+ * version number is incremented for backward compatible API changes or major
+ * new features - e.g. adding a new public function or a new decoder. The micro
+ * version number is incremented for smaller changes that a calling program
+ * might still want to check for - e.g. changing behavior in a previously
+ * unspecified situation.
+ *
+ * FFmpeg guarantees backward API and ABI compatibility for each library as long
+ * as its major version number is unchanged. This means that no public symbols
+ * will be removed or renamed. Types and names of the public struct members and
+ * values of public macros and enums will remain the same (unless they were
+ * explicitly declared as not part of the public API). Documented behavior will
+ * not change.
+ *
+ * In other words, any correct program that works with a given FFmpeg snapshot
+ * should work just as well without any changes with any later snapshot with the
+ * same major versions. This applies to both rebuilding the program against new
+ * FFmpeg versions or to replacing the dynamic FFmpeg libraries that a program
+ * links against.
+ *
+ * However, new public symbols may be added and new members may be appended to
+ * public structs whose size is not part of public ABI (most public structs in
+ * FFmpeg). New macros and enum values may be added. Behavior in undocumented
+ * situations may change slightly (and be documented). All those are accompanied
+ * by an entry in doc/APIchanges and incrementing either the minor or micro
+ * version number.
+ */
+
+/**
+ * @defgroup lavu libavutil
+ * Common code shared across all FFmpeg libraries.
+ *
+ * @note
+ * libavutil is designed to be modular. In most cases, in order to use the
+ * functions provided by one component of libavutil you must explicitly include
+ * the specific header containing that feature. If you are only using
+ * media-related components, you could simply include libavutil/avutil.h, which
+ * brings in most of the "core" components.
+ *
+ * @{
+ *
+ * @defgroup lavu_crypto Crypto and Hashing
+ *
+ * @{
+ * @}
+ *
+ * @defgroup lavu_math Mathematics
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_string String Manipulation
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_mem Memory Management
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_data Data Structures
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_video Video related
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_audio Audio related
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_error Error Codes
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_log Logging Facility
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_misc Other
+ *
+ * @{
+ *
+ * @defgroup preproc_misc Preprocessor String Macros
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup version_utils Library Version Macros
+ *
+ * @{
+ *
+ * @}
+ */
+
+
+/**
+ * @addtogroup lavu_ver
+ * @{
+ */
+
+/**
+ * Return the LIBAVUTIL_VERSION_INT constant.
+ */
+unsigned avutil_version(void);
+
+/**
+ * Return an informative version string. This usually is the actual release
+ * version number or a git commit description. This string has no fixed format
+ * and can change any time. It should never be parsed by code.
+ */
+const char *av_version_info(void);
+
+/**
+ * Return the libavutil build-time configuration.
+ */
+const char *avutil_configuration(void);
+
+/**
+ * Return the libavutil license.
+ */
+const char *avutil_license(void);
+
+/**
+ * @}
+ */
+
+/**
+ * @addtogroup lavu_media Media Type
+ * @brief Media Type
+ */
+
+enum AVMediaType {
+    AVMEDIA_TYPE_UNKNOWN = -1,  ///< Usually treated as AVMEDIA_TYPE_DATA
+    AVMEDIA_TYPE_VIDEO,
+    AVMEDIA_TYPE_AUDIO,
+    AVMEDIA_TYPE_DATA,          ///< Opaque data information usually continuous
+    AVMEDIA_TYPE_SUBTITLE,
+    AVMEDIA_TYPE_ATTACHMENT,    ///< Opaque data information usually sparse
+    AVMEDIA_TYPE_NB
+};
+
+/**
+ * Return a string describing the media_type enum, NULL if media_type
+ * is unknown.
+ */
+const char *av_get_media_type_string(enum AVMediaType media_type);
+
+/**
+ * @defgroup lavu_const Constants
+ * @{
+ *
+ * @defgroup lavu_enc Encoding specific
+ *
+ * @note those definition should move to avcodec
+ * @{
+ */
+
+#define FF_LAMBDA_SHIFT 7
+#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
+#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
+#define FF_LAMBDA_MAX (256*128-1)
+
+#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
+
+/**
+ * @}
+ * @defgroup lavu_time Timestamp specific
+ *
+ * FFmpeg internal timebase and timestamp definitions
+ *
+ * @{
+ */
+
+/**
+ * @brief Undefined timestamp value
+ *
+ * Usually reported by demuxer that work on containers that do not provide
+ * either pts or dts.
+ */
+
+#define AV_NOPTS_VALUE          ((int64_t)UINT64_C(0x8000000000000000))
+
+/**
+ * Internal time base represented as integer
+ */
+
+#define AV_TIME_BASE            1000000
+
+/**
+ * Internal time base represented as fractional value
+ */
+
+#ifdef __cplusplus
+/* ISO C++ forbids compound-literals. */
+#define AV_TIME_BASE_Q          av_make_q(1, AV_TIME_BASE)
+#else
+#define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
+#endif
+
+/**
+ * @}
+ * @}
+ * @defgroup lavu_picture Image related
+ *
+ * AVPicture types, pixel formats and basic image planes manipulation.
+ *
+ * @{
+ */
+
+enum AVPictureType {
+    AV_PICTURE_TYPE_NONE = 0, ///< Undefined
+    AV_PICTURE_TYPE_I,     ///< Intra
+    AV_PICTURE_TYPE_P,     ///< Predicted
+    AV_PICTURE_TYPE_B,     ///< Bi-dir predicted
+    AV_PICTURE_TYPE_S,     ///< S(GMC)-VOP MPEG-4
+    AV_PICTURE_TYPE_SI,    ///< Switching Intra
+    AV_PICTURE_TYPE_SP,    ///< Switching Predicted
+    AV_PICTURE_TYPE_BI,    ///< BI type
+};
+
+/**
+ * Return a single letter to describe the given picture type
+ * pict_type.
+ *
+ * @param[in] pict_type the picture type @return a single character
+ * representing the picture type, '?' if pict_type is unknown
+ */
+char av_get_picture_type_char(enum AVPictureType pict_type);
+
+/**
+ * @}
+ */
+
+#include "common.h"
+#include "rational.h"
+#include "version.h"
+#include "macros.h"
+#include "mathematics.h"
+#include "log.h"
+#include "pixfmt.h"
+
+/**
+ * Return x default pointer in case p is NULL.
+ */
+static inline void *av_x_if_null(const void *p, const void *x)
+{
+    return (void *)(intptr_t)(p ? p : x);
+}
+
+#if FF_API_OPT_INT_LIST
+/**
+ * Compute the length of an integer list.
+ *
+ * @param elsize  size in bytes of each list element (only 1, 2, 4 or 8)
+ * @param term    list terminator (usually 0 or -1)
+ * @param list    pointer to the list
+ * @return  length of the list, in elements, not counting the terminator
+ */
+attribute_deprecated
+unsigned av_int_list_length_for_size(unsigned elsize,
+                                     const void *list, uint64_t term) av_pure;
+
+/**
+ * Compute the length of an integer list.
+ *
+ * @param term  list terminator (usually 0 or -1)
+ * @param list  pointer to the list
+ * @return  length of the list, in elements, not counting the terminator
+ */
+#define av_int_list_length(list, term) \
+    av_int_list_length_for_size(sizeof(*(list)), list, term)
+#endif
+
+/**
+ * Return the fractional representation of the internal time base.
+ */
+AVRational av_get_time_base_q(void);
+
+#define AV_FOURCC_MAX_STRING_SIZE 32
+
+#define av_fourcc2str(fourcc) av_fourcc_make_string((char[AV_FOURCC_MAX_STRING_SIZE]){0}, fourcc)
+
+/**
+ * Fill the provided buffer with a string containing a FourCC (four-character
+ * code) representation.
+ *
+ * @param buf    a buffer with size in bytes of at least AV_FOURCC_MAX_STRING_SIZE
+ * @param fourcc the fourcc to represent
+ * @return the buffer in input
+ */
+char *av_fourcc_make_string(char *buf, uint32_t fourcc);
+
+/**
+ * @}
+ * @}
+ */
+
+#endif /* AVUTIL_AVUTIL_H */

ffmpeg/libavutil/avutilres.rc

@@ -0,0 +1,55 @@
+/*
+ * Windows resource file for libavutil
+ *
+ * Copyright (C) 2012 James Almer
+ * Copyright (C) 2013 Tiancheng "Timothy" Gu
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <windows.h>
+#include "libavutil/version.h"
+#include "libavutil/ffversion.h"
+#include "config.h"
+
+1 VERSIONINFO
+FILEVERSION     LIBAVUTIL_VERSION_MAJOR, LIBAVUTIL_VERSION_MINOR, LIBAVUTIL_VERSION_MICRO, 0
+PRODUCTVERSION  LIBAVUTIL_VERSION_MAJOR, LIBAVUTIL_VERSION_MINOR, LIBAVUTIL_VERSION_MICRO, 0
+FILEFLAGSMASK   VS_FFI_FILEFLAGSMASK
+FILEOS          VOS_NT_WINDOWS32
+FILETYPE        VFT_DLL
+{
+    BLOCK "StringFileInfo"
+    {
+        BLOCK "040904B0"
+        {
+            VALUE "CompanyName",      "FFmpeg Project"
+            VALUE "FileDescription",  "FFmpeg utility library"
+            VALUE "FileVersion",      AV_STRINGIFY(LIBAVUTIL_VERSION)
+            VALUE "InternalName",     "libavutil"
+            VALUE "LegalCopyright",   "Copyright (C) 2000-" AV_STRINGIFY(CONFIG_THIS_YEAR) " FFmpeg Project"
+            VALUE "OriginalFilename", "avutil" BUILDSUF "-" AV_STRINGIFY(LIBAVUTIL_VERSION_MAJOR) SLIBSUF
+            VALUE "ProductName",      "FFmpeg"
+            VALUE "ProductVersion",   FFMPEG_VERSION
+        }
+    }
+
+    BLOCK "VarFileInfo"
+    {
+        VALUE "Translation", 0x0409, 0x04B0
+    }
+}

ffmpeg/libavutil/base64.c

@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @brief Base64 encode/decode
+ * @author Ryan Martell <rdm4@martellventures.com> (with lots of Michael)
+ */
+
+#include <limits.h>
+#include <stddef.h>
+
+#include "base64.h"
+#include "error.h"
+#include "intreadwrite.h"
+
+/* ---------------- private code */
+static const uint8_t map2[256] =
+{
+    0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff,
+
+    0x3e, 0xff, 0xff, 0xff, 0x3f, 0x34, 0x35, 0x36,
+    0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0xff,
+    0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, 0x00, 0x01,
+    0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
+    0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,
+    0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1a, 0x1b,
+    0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
+    0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
+    0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33,
+
+                      0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+};
+
+#define BASE64_DEC_STEP(i) do { \
+    bits = map2[in[i]]; \
+    if (bits & 0x80) \
+        goto out ## i; \
+    v = i ? (v << 6) + bits : bits; \
+} while(0)
+
+int av_base64_decode(uint8_t *out, const char *in_str, int out_size)
+{
+    uint8_t *dst = out;
+    uint8_t *end;
+    // no sign extension
+    const uint8_t *in = in_str;
+    unsigned bits = 0xff;
+    unsigned v;
+
+    if (!out)
+        goto validity_check;
+
+    end = out + out_size;
+    while (end - dst > 3) {
+        BASE64_DEC_STEP(0);
+        BASE64_DEC_STEP(1);
+        BASE64_DEC_STEP(2);
+        BASE64_DEC_STEP(3);
+        // Using AV_WB32 directly confuses compiler
+        v = av_be2ne32(v << 8);
+        AV_WN32(dst, v);
+        dst += 3;
+        in += 4;
+    }
+    if (end - dst) {
+        BASE64_DEC_STEP(0);
+        BASE64_DEC_STEP(1);
+        BASE64_DEC_STEP(2);
+        BASE64_DEC_STEP(3);
+        *dst++ = v >> 16;
+        if (end - dst)
+            *dst++ = v >> 8;
+        if (end - dst)
+            *dst++ = v;
+        in += 4;
+    }
+validity_check:
+    while (1) {
+        BASE64_DEC_STEP(0);
+        in++;
+        BASE64_DEC_STEP(0);
+        in++;
+        BASE64_DEC_STEP(0);
+        in++;
+        BASE64_DEC_STEP(0);
+        in++;
+    }
+
+out3:
+    if (end - dst)
+        *dst++ = v >> 10;
+    v <<= 2;
+out2:
+    if (end - dst)
+        *dst++ = v >> 4;
+out1:
+out0:
+    return bits & 1 ? AVERROR_INVALIDDATA : out ? dst - out : 0;
+}
+
+/*****************************************************************************
+* b64_encode: Stolen from VLC's http.c.
+* Simplified by Michael.
+* Fixed edge cases and made it work from data (vs. strings) by Ryan.
+*****************************************************************************/
+
+char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size)
+{
+    static const char b64[] =
+        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    char *ret, *dst;
+    unsigned i_bits = 0;
+    int i_shift = 0;
+    int bytes_remaining = in_size;
+
+    if (in_size >= UINT_MAX / 4 ||
+        out_size < AV_BASE64_SIZE(in_size))
+        return NULL;
+    ret = dst = out;
+    while (bytes_remaining > 3) {
+        i_bits = AV_RB32(in);
+        in += 3; bytes_remaining -= 3;
+        *dst++ = b64[ i_bits>>26        ];
+        *dst++ = b64[(i_bits>>20) & 0x3F];
+        *dst++ = b64[(i_bits>>14) & 0x3F];
+        *dst++ = b64[(i_bits>>8 ) & 0x3F];
+    }
+    i_bits = 0;
+    while (bytes_remaining) {
+        i_bits = (i_bits << 8) + *in++;
+        bytes_remaining--;
+        i_shift += 8;
+    }
+    while (i_shift > 0) {
+        *dst++ = b64[(i_bits << 6 >> i_shift) & 0x3f];
+        i_shift -= 6;
+    }
+    while ((dst - ret) & 3)
+        *dst++ = '=';
+    *dst = '\0';
+
+    return ret;
+}

ffmpeg/libavutil/base64.h

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_BASE64_H
+#define AVUTIL_BASE64_H
+
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_base64 Base64
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+/**
+ * Decode a base64-encoded string.
+ *
+ * @param out      buffer for decoded data
+ * @param in       null-terminated input string
+ * @param out_size size in bytes of the out buffer, must be at
+ *                 least 3/4 of the length of in, that is AV_BASE64_DECODE_SIZE(strlen(in))
+ * @return         number of bytes written, or a negative value in case of
+ *                 invalid input
+ */
+int av_base64_decode(uint8_t *out, const char *in, int out_size);
+
+/**
+ * Calculate the output size in bytes needed to decode a base64 string
+ * with length x to a data buffer.
+ */
+#define AV_BASE64_DECODE_SIZE(x) ((x) * 3LL / 4)
+
+/**
+ * Encode data to base64 and null-terminate.
+ *
+ * @param out      buffer for encoded data
+ * @param out_size size in bytes of the out buffer (including the
+ *                 null terminator), must be at least AV_BASE64_SIZE(in_size)
+ * @param in       input buffer containing the data to encode
+ * @param in_size  size in bytes of the in buffer
+ * @return         out or NULL in case of error
+ */
+char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size);
+
+/**
+ * Calculate the output size needed to base64-encode x bytes to a
+ * null-terminated string.
+ */
+#define AV_BASE64_SIZE(x)  (((x)+2) / 3 * 4 + 1)
+
+ /**
+  * @}
+  */
+
+#endif /* AVUTIL_BASE64_H */

ffmpeg/libavutil/blowfish.c

@@ -0,0 +1,425 @@
+/*
+ * Blowfish algorithm
+ * Copyright (c) 2012 Samuel Pitoiset
+ *
+ * loosely based on Paul Kocher's implementation
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+
+#include "attributes.h"
+#include "intreadwrite.h"
+#include "mem.h"
+#include "blowfish.h"
+
+static const uint32_t orig_p[AV_BF_ROUNDS + 2] = {
+    0x243F6A88, 0x85A308D3, 0x13198A2E, 0x03707344,
+    0xA4093822, 0x299F31D0, 0x082EFA98, 0xEC4E6C89,
+    0x452821E6, 0x38D01377, 0xBE5466CF, 0x34E90C6C,
+    0xC0AC29B7, 0xC97C50DD, 0x3F84D5B5, 0xB5470917,
+    0x9216D5D9, 0x8979FB1B
+};
+
+static const uint32_t orig_s[4][256] = {
+    { 0xD1310BA6, 0x98DFB5AC, 0x2FFD72DB, 0xD01ADFB7,
+      0xB8E1AFED, 0x6A267E96, 0xBA7C9045, 0xF12C7F99,
+      0x24A19947, 0xB3916CF7, 0x0801F2E2, 0x858EFC16,
+      0x636920D8, 0x71574E69, 0xA458FEA3, 0xF4933D7E,
+      0x0D95748F, 0x728EB658, 0x718BCD58, 0x82154AEE,
+      0x7B54A41D, 0xC25A59B5, 0x9C30D539, 0x2AF26013,
+      0xC5D1B023, 0x286085F0, 0xCA417918, 0xB8DB38EF,
+      0x8E79DCB0, 0x603A180E, 0x6C9E0E8B, 0xB01E8A3E,
+      0xD71577C1, 0xBD314B27, 0x78AF2FDA, 0x55605C60,
+      0xE65525F3, 0xAA55AB94, 0x57489862, 0x63E81440,
+      0x55CA396A, 0x2AAB10B6, 0xB4CC5C34, 0x1141E8CE,
+      0xA15486AF, 0x7C72E993, 0xB3EE1411, 0x636FBC2A,
+      0x2BA9C55D, 0x741831F6, 0xCE5C3E16, 0x9B87931E,
+      0xAFD6BA33, 0x6C24CF5C, 0x7A325381, 0x28958677,
+      0x3B8F4898, 0x6B4BB9AF, 0xC4BFE81B, 0x66282193,
+      0x61D809CC, 0xFB21A991, 0x487CAC60, 0x5DEC8032,
+      0xEF845D5D, 0xE98575B1, 0xDC262302, 0xEB651B88,
+      0x23893E81, 0xD396ACC5, 0x0F6D6FF3, 0x83F44239,
+      0x2E0B4482, 0xA4842004, 0x69C8F04A, 0x9E1F9B5E,
+      0x21C66842, 0xF6E96C9A, 0x670C9C61, 0xABD388F0,
+      0x6A51A0D2, 0xD8542F68, 0x960FA728, 0xAB5133A3,
+      0x6EEF0B6C, 0x137A3BE4, 0xBA3BF050, 0x7EFB2A98,
+      0xA1F1651D, 0x39AF0176, 0x66CA593E, 0x82430E88,
+      0x8CEE8619, 0x456F9FB4, 0x7D84A5C3, 0x3B8B5EBE,
+      0xE06F75D8, 0x85C12073, 0x401A449F, 0x56C16AA6,
+      0x4ED3AA62, 0x363F7706, 0x1BFEDF72, 0x429B023D,
+      0x37D0D724, 0xD00A1248, 0xDB0FEAD3, 0x49F1C09B,
+      0x075372C9, 0x80991B7B, 0x25D479D8, 0xF6E8DEF7,
+      0xE3FE501A, 0xB6794C3B, 0x976CE0BD, 0x04C006BA,
+      0xC1A94FB6, 0x409F60C4, 0x5E5C9EC2, 0x196A2463,
+      0x68FB6FAF, 0x3E6C53B5, 0x1339B2EB, 0x3B52EC6F,
+      0x6DFC511F, 0x9B30952C, 0xCC814544, 0xAF5EBD09,
+      0xBEE3D004, 0xDE334AFD, 0x660F2807, 0x192E4BB3,
+      0xC0CBA857, 0x45C8740F, 0xD20B5F39, 0xB9D3FBDB,
+      0x5579C0BD, 0x1A60320A, 0xD6A100C6, 0x402C7279,
+      0x679F25FE, 0xFB1FA3CC, 0x8EA5E9F8, 0xDB3222F8,
+      0x3C7516DF, 0xFD616B15, 0x2F501EC8, 0xAD0552AB,
+      0x323DB5FA, 0xFD238760, 0x53317B48, 0x3E00DF82,
+      0x9E5C57BB, 0xCA6F8CA0, 0x1A87562E, 0xDF1769DB,
+      0xD542A8F6, 0x287EFFC3, 0xAC6732C6, 0x8C4F5573,
+      0x695B27B0, 0xBBCA58C8, 0xE1FFA35D, 0xB8F011A0,
+      0x10FA3D98, 0xFD2183B8, 0x4AFCB56C, 0x2DD1D35B,
+      0x9A53E479, 0xB6F84565, 0xD28E49BC, 0x4BFB9790,
+      0xE1DDF2DA, 0xA4CB7E33, 0x62FB1341, 0xCEE4C6E8,
+      0xEF20CADA, 0x36774C01, 0xD07E9EFE, 0x2BF11FB4,
+      0x95DBDA4D, 0xAE909198, 0xEAAD8E71, 0x6B93D5A0,
+      0xD08ED1D0, 0xAFC725E0, 0x8E3C5B2F, 0x8E7594B7,
+      0x8FF6E2FB, 0xF2122B64, 0x8888B812, 0x900DF01C,
+      0x4FAD5EA0, 0x688FC31C, 0xD1CFF191, 0xB3A8C1AD,
+      0x2F2F2218, 0xBE0E1777, 0xEA752DFE, 0x8B021FA1,
+      0xE5A0CC0F, 0xB56F74E8, 0x18ACF3D6, 0xCE89E299,
+      0xB4A84FE0, 0xFD13E0B7, 0x7CC43B81, 0xD2ADA8D9,
+      0x165FA266, 0x80957705, 0x93CC7314, 0x211A1477,
+      0xE6AD2065, 0x77B5FA86, 0xC75442F5, 0xFB9D35CF,
+      0xEBCDAF0C, 0x7B3E89A0, 0xD6411BD3, 0xAE1E7E49,
+      0x00250E2D, 0x2071B35E, 0x226800BB, 0x57B8E0AF,
+      0x2464369B, 0xF009B91E, 0x5563911D, 0x59DFA6AA,
+      0x78C14389, 0xD95A537F, 0x207D5BA2, 0x02E5B9C5,
+      0x83260376, 0x6295CFA9, 0x11C81968, 0x4E734A41,
+      0xB3472DCA, 0x7B14A94A, 0x1B510052, 0x9A532915,
+      0xD60F573F, 0xBC9BC6E4, 0x2B60A476, 0x81E67400,
+      0x08BA6FB5, 0x571BE91F, 0xF296EC6B, 0x2A0DD915,
+      0xB6636521, 0xE7B9F9B6, 0xFF34052E, 0xC5855664,
+      0x53B02D5D, 0xA99F8FA1, 0x08BA4799, 0x6E85076A },
+    { 0x4B7A70E9, 0xB5B32944, 0xDB75092E, 0xC4192623,
+      0xAD6EA6B0, 0x49A7DF7D, 0x9CEE60B8, 0x8FEDB266,
+      0xECAA8C71, 0x699A17FF, 0x5664526C, 0xC2B19EE1,
+      0x193602A5, 0x75094C29, 0xA0591340, 0xE4183A3E,
+      0x3F54989A, 0x5B429D65, 0x6B8FE4D6, 0x99F73FD6,
+      0xA1D29C07, 0xEFE830F5, 0x4D2D38E6, 0xF0255DC1,
+      0x4CDD2086, 0x8470EB26, 0x6382E9C6, 0x021ECC5E,
+      0x09686B3F, 0x3EBAEFC9, 0x3C971814, 0x6B6A70A1,
+      0x687F3584, 0x52A0E286, 0xB79C5305, 0xAA500737,
+      0x3E07841C, 0x7FDEAE5C, 0x8E7D44EC, 0x5716F2B8,
+      0xB03ADA37, 0xF0500C0D, 0xF01C1F04, 0x0200B3FF,
+      0xAE0CF51A, 0x3CB574B2, 0x25837A58, 0xDC0921BD,
+      0xD19113F9, 0x7CA92FF6, 0x94324773, 0x22F54701,
+      0x3AE5E581, 0x37C2DADC, 0xC8B57634, 0x9AF3DDA7,
+      0xA9446146, 0x0FD0030E, 0xECC8C73E, 0xA4751E41,
+      0xE238CD99, 0x3BEA0E2F, 0x3280BBA1, 0x183EB331,
+      0x4E548B38, 0x4F6DB908, 0x6F420D03, 0xF60A04BF,
+      0x2CB81290, 0x24977C79, 0x5679B072, 0xBCAF89AF,
+      0xDE9A771F, 0xD9930810, 0xB38BAE12, 0xDCCF3F2E,
+      0x5512721F, 0x2E6B7124, 0x501ADDE6, 0x9F84CD87,
+      0x7A584718, 0x7408DA17, 0xBC9F9ABC, 0xE94B7D8C,
+      0xEC7AEC3A, 0xDB851DFA, 0x63094366, 0xC464C3D2,
+      0xEF1C1847, 0x3215D908, 0xDD433B37, 0x24C2BA16,
+      0x12A14D43, 0x2A65C451, 0x50940002, 0x133AE4DD,
+      0x71DFF89E, 0x10314E55, 0x81AC77D6, 0x5F11199B,
+      0x043556F1, 0xD7A3C76B, 0x3C11183B, 0x5924A509,
+      0xF28FE6ED, 0x97F1FBFA, 0x9EBABF2C, 0x1E153C6E,
+      0x86E34570, 0xEAE96FB1, 0x860E5E0A, 0x5A3E2AB3,
+      0x771FE71C, 0x4E3D06FA, 0x2965DCB9, 0x99E71D0F,
+      0x803E89D6, 0x5266C825, 0x2E4CC978, 0x9C10B36A,
+      0xC6150EBA, 0x94E2EA78, 0xA5FC3C53, 0x1E0A2DF4,
+      0xF2F74EA7, 0x361D2B3D, 0x1939260F, 0x19C27960,
+      0x5223A708, 0xF71312B6, 0xEBADFE6E, 0xEAC31F66,
+      0xE3BC4595, 0xA67BC883, 0xB17F37D1, 0x018CFF28,
+      0xC332DDEF, 0xBE6C5AA5, 0x65582185, 0x68AB9802,
+      0xEECEA50F, 0xDB2F953B, 0x2AEF7DAD, 0x5B6E2F84,
+      0x1521B628, 0x29076170, 0xECDD4775, 0x619F1510,
+      0x13CCA830, 0xEB61BD96, 0x0334FE1E, 0xAA0363CF,
+      0xB5735C90, 0x4C70A239, 0xD59E9E0B, 0xCBAADE14,
+      0xEECC86BC, 0x60622CA7, 0x9CAB5CAB, 0xB2F3846E,
+      0x648B1EAF, 0x19BDF0CA, 0xA02369B9, 0x655ABB50,
+      0x40685A32, 0x3C2AB4B3, 0x319EE9D5, 0xC021B8F7,
+      0x9B540B19, 0x875FA099, 0x95F7997E, 0x623D7DA8,
+      0xF837889A, 0x97E32D77, 0x11ED935F, 0x16681281,
+      0x0E358829, 0xC7E61FD6, 0x96DEDFA1, 0x7858BA99,
+      0x57F584A5, 0x1B227263, 0x9B83C3FF, 0x1AC24696,
+      0xCDB30AEB, 0x532E3054, 0x8FD948E4, 0x6DBC3128,
+      0x58EBF2EF, 0x34C6FFEA, 0xFE28ED61, 0xEE7C3C73,
+      0x5D4A14D9, 0xE864B7E3, 0x42105D14, 0x203E13E0,
+      0x45EEE2B6, 0xA3AAABEA, 0xDB6C4F15, 0xFACB4FD0,
+      0xC742F442, 0xEF6ABBB5, 0x654F3B1D, 0x41CD2105,
+      0xD81E799E, 0x86854DC7, 0xE44B476A, 0x3D816250,
+      0xCF62A1F2, 0x5B8D2646, 0xFC8883A0, 0xC1C7B6A3,
+      0x7F1524C3, 0x69CB7492, 0x47848A0B, 0x5692B285,
+      0x095BBF00, 0xAD19489D, 0x1462B174, 0x23820E00,
+      0x58428D2A, 0x0C55F5EA, 0x1DADF43E, 0x233F7061,
+      0x3372F092, 0x8D937E41, 0xD65FECF1, 0x6C223BDB,
+      0x7CDE3759, 0xCBEE7460, 0x4085F2A7, 0xCE77326E,
+      0xA6078084, 0x19F8509E, 0xE8EFD855, 0x61D99735,
+      0xA969A7AA, 0xC50C06C2, 0x5A04ABFC, 0x800BCADC,
+      0x9E447A2E, 0xC3453484, 0xFDD56705, 0x0E1E9EC9,
+      0xDB73DBD3, 0x105588CD, 0x675FDA79, 0xE3674340,
+      0xC5C43465, 0x713E38D8, 0x3D28F89E, 0xF16DFF20,
+      0x153E21E7, 0x8FB03D4A, 0xE6E39F2B, 0xDB83ADF7 },
+    { 0xE93D5A68, 0x948140F7, 0xF64C261C, 0x94692934,
+      0x411520F7, 0x7602D4F7, 0xBCF46B2E, 0xD4A20068,
+      0xD4082471, 0x3320F46A, 0x43B7D4B7, 0x500061AF,
+      0x1E39F62E, 0x97244546, 0x14214F74, 0xBF8B8840,
+      0x4D95FC1D, 0x96B591AF, 0x70F4DDD3, 0x66A02F45,
+      0xBFBC09EC, 0x03BD9785, 0x7FAC6DD0, 0x31CB8504,
+      0x96EB27B3, 0x55FD3941, 0xDA2547E6, 0xABCA0A9A,
+      0x28507825, 0x530429F4, 0x0A2C86DA, 0xE9B66DFB,
+      0x68DC1462, 0xD7486900, 0x680EC0A4, 0x27A18DEE,
+      0x4F3FFEA2, 0xE887AD8C, 0xB58CE006, 0x7AF4D6B6,
+      0xAACE1E7C, 0xD3375FEC, 0xCE78A399, 0x406B2A42,
+      0x20FE9E35, 0xD9F385B9, 0xEE39D7AB, 0x3B124E8B,
+      0x1DC9FAF7, 0x4B6D1856, 0x26A36631, 0xEAE397B2,
+      0x3A6EFA74, 0xDD5B4332, 0x6841E7F7, 0xCA7820FB,
+      0xFB0AF54E, 0xD8FEB397, 0x454056AC, 0xBA489527,
+      0x55533A3A, 0x20838D87, 0xFE6BA9B7, 0xD096954B,
+      0x55A867BC, 0xA1159A58, 0xCCA92963, 0x99E1DB33,
+      0xA62A4A56, 0x3F3125F9, 0x5EF47E1C, 0x9029317C,
+      0xFDF8E802, 0x04272F70, 0x80BB155C, 0x05282CE3,
+      0x95C11548, 0xE4C66D22, 0x48C1133F, 0xC70F86DC,
+      0x07F9C9EE, 0x41041F0F, 0x404779A4, 0x5D886E17,
+      0x325F51EB, 0xD59BC0D1, 0xF2BCC18F, 0x41113564,
+      0x257B7834, 0x602A9C60, 0xDFF8E8A3, 0x1F636C1B,
+      0x0E12B4C2, 0x02E1329E, 0xAF664FD1, 0xCAD18115,
+      0x6B2395E0, 0x333E92E1, 0x3B240B62, 0xEEBEB922,
+      0x85B2A20E, 0xE6BA0D99, 0xDE720C8C, 0x2DA2F728,
+      0xD0127845, 0x95B794FD, 0x647D0862, 0xE7CCF5F0,
+      0x5449A36F, 0x877D48FA, 0xC39DFD27, 0xF33E8D1E,
+      0x0A476341, 0x992EFF74, 0x3A6F6EAB, 0xF4F8FD37,
+      0xA812DC60, 0xA1EBDDF8, 0x991BE14C, 0xDB6E6B0D,
+      0xC67B5510, 0x6D672C37, 0x2765D43B, 0xDCD0E804,
+      0xF1290DC7, 0xCC00FFA3, 0xB5390F92, 0x690FED0B,
+      0x667B9FFB, 0xCEDB7D9C, 0xA091CF0B, 0xD9155EA3,
+      0xBB132F88, 0x515BAD24, 0x7B9479BF, 0x763BD6EB,
+      0x37392EB3, 0xCC115979, 0x8026E297, 0xF42E312D,
+      0x6842ADA7, 0xC66A2B3B, 0x12754CCC, 0x782EF11C,
+      0x6A124237, 0xB79251E7, 0x06A1BBE6, 0x4BFB6350,
+      0x1A6B1018, 0x11CAEDFA, 0x3D25BDD8, 0xE2E1C3C9,
+      0x44421659, 0x0A121386, 0xD90CEC6E, 0xD5ABEA2A,
+      0x64AF674E, 0xDA86A85F, 0xBEBFE988, 0x64E4C3FE,
+      0x9DBC8057, 0xF0F7C086, 0x60787BF8, 0x6003604D,
+      0xD1FD8346, 0xF6381FB0, 0x7745AE04, 0xD736FCCC,
+      0x83426B33, 0xF01EAB71, 0xB0804187, 0x3C005E5F,
+      0x77A057BE, 0xBDE8AE24, 0x55464299, 0xBF582E61,
+      0x4E58F48F, 0xF2DDFDA2, 0xF474EF38, 0x8789BDC2,
+      0x5366F9C3, 0xC8B38E74, 0xB475F255, 0x46FCD9B9,
+      0x7AEB2661, 0x8B1DDF84, 0x846A0E79, 0x915F95E2,
+      0x466E598E, 0x20B45770, 0x8CD55591, 0xC902DE4C,
+      0xB90BACE1, 0xBB8205D0, 0x11A86248, 0x7574A99E,
+      0xB77F19B6, 0xE0A9DC09, 0x662D09A1, 0xC4324633,
+      0xE85A1F02, 0x09F0BE8C, 0x4A99A025, 0x1D6EFE10,
+      0x1AB93D1D, 0x0BA5A4DF, 0xA186F20F, 0x2868F169,
+      0xDCB7DA83, 0x573906FE, 0xA1E2CE9B, 0x4FCD7F52,
+      0x50115E01, 0xA70683FA, 0xA002B5C4, 0x0DE6D027,
+      0x9AF88C27, 0x773F8641, 0xC3604C06, 0x61A806B5,
+      0xF0177A28, 0xC0F586E0, 0x006058AA, 0x30DC7D62,
+      0x11E69ED7, 0x2338EA63, 0x53C2DD94, 0xC2C21634,
+      0xBBCBEE56, 0x90BCB6DE, 0xEBFC7DA1, 0xCE591D76,
+      0x6F05E409, 0x4B7C0188, 0x39720A3D, 0x7C927C24,
+      0x86E3725F, 0x724D9DB9, 0x1AC15BB4, 0xD39EB8FC,
+      0xED545578, 0x08FCA5B5, 0xD83D7CD3, 0x4DAD0FC4,
+      0x1E50EF5E, 0xB161E6F8, 0xA28514D9, 0x6C51133C,
+      0x6FD5C7E7, 0x56E14EC4, 0x362ABFCE, 0xDDC6C837,
+      0xD79A3234, 0x92638212, 0x670EFA8E, 0x406000E0 },
+    { 0x3A39CE37, 0xD3FAF5CF, 0xABC27737, 0x5AC52D1B,
+      0x5CB0679E, 0x4FA33742, 0xD3822740, 0x99BC9BBE,
+      0xD5118E9D, 0xBF0F7315, 0xD62D1C7E, 0xC700C47B,
+      0xB78C1B6B, 0x21A19045, 0xB26EB1BE, 0x6A366EB4,
+      0x5748AB2F, 0xBC946E79, 0xC6A376D2, 0x6549C2C8,
+      0x530FF8EE, 0x468DDE7D, 0xD5730A1D, 0x4CD04DC6,
+      0x2939BBDB, 0xA9BA4650, 0xAC9526E8, 0xBE5EE304,
+      0xA1FAD5F0, 0x6A2D519A, 0x63EF8CE2, 0x9A86EE22,
+      0xC089C2B8, 0x43242EF6, 0xA51E03AA, 0x9CF2D0A4,
+      0x83C061BA, 0x9BE96A4D, 0x8FE51550, 0xBA645BD6,
+      0x2826A2F9, 0xA73A3AE1, 0x4BA99586, 0xEF5562E9,
+      0xC72FEFD3, 0xF752F7DA, 0x3F046F69, 0x77FA0A59,
+      0x80E4A915, 0x87B08601, 0x9B09E6AD, 0x3B3EE593,
+      0xE990FD5A, 0x9E34D797, 0x2CF0B7D9, 0x022B8B51,
+      0x96D5AC3A, 0x017DA67D, 0xD1CF3ED6, 0x7C7D2D28,
+      0x1F9F25CF, 0xADF2B89B, 0x5AD6B472, 0x5A88F54C,
+      0xE029AC71, 0xE019A5E6, 0x47B0ACFD, 0xED93FA9B,
+      0xE8D3C48D, 0x283B57CC, 0xF8D56629, 0x79132E28,
+      0x785F0191, 0xED756055, 0xF7960E44, 0xE3D35E8C,
+      0x15056DD4, 0x88F46DBA, 0x03A16125, 0x0564F0BD,
+      0xC3EB9E15, 0x3C9057A2, 0x97271AEC, 0xA93A072A,
+      0x1B3F6D9B, 0x1E6321F5, 0xF59C66FB, 0x26DCF319,
+      0x7533D928, 0xB155FDF5, 0x03563482, 0x8ABA3CBB,
+      0x28517711, 0xC20AD9F8, 0xABCC5167, 0xCCAD925F,
+      0x4DE81751, 0x3830DC8E, 0x379D5862, 0x9320F991,
+      0xEA7A90C2, 0xFB3E7BCE, 0x5121CE64, 0x774FBE32,
+      0xA8B6E37E, 0xC3293D46, 0x48DE5369, 0x6413E680,
+      0xA2AE0810, 0xDD6DB224, 0x69852DFD, 0x09072166,
+      0xB39A460A, 0x6445C0DD, 0x586CDECF, 0x1C20C8AE,
+      0x5BBEF7DD, 0x1B588D40, 0xCCD2017F, 0x6BB4E3BB,
+      0xDDA26A7E, 0x3A59FF45, 0x3E350A44, 0xBCB4CDD5,
+      0x72EACEA8, 0xFA6484BB, 0x8D6612AE, 0xBF3C6F47,
+      0xD29BE463, 0x542F5D9E, 0xAEC2771B, 0xF64E6370,
+      0x740E0D8D, 0xE75B1357, 0xF8721671, 0xAF537D5D,
+      0x4040CB08, 0x4EB4E2CC, 0x34D2466A, 0x0115AF84,
+      0xE1B00428, 0x95983A1D, 0x06B89FB4, 0xCE6EA048,
+      0x6F3F3B82, 0x3520AB82, 0x011A1D4B, 0x277227F8,
+      0x611560B1, 0xE7933FDC, 0xBB3A792B, 0x344525BD,
+      0xA08839E1, 0x51CE794B, 0x2F32C9B7, 0xA01FBAC9,
+      0xE01CC87E, 0xBCC7D1F6, 0xCF0111C3, 0xA1E8AAC7,
+      0x1A908749, 0xD44FBD9A, 0xD0DADECB, 0xD50ADA38,
+      0x0339C32A, 0xC6913667, 0x8DF9317C, 0xE0B12B4F,
+      0xF79E59B7, 0x43F5BB3A, 0xF2D519FF, 0x27D9459C,
+      0xBF97222C, 0x15E6FC2A, 0x0F91FC71, 0x9B941525,
+      0xFAE59361, 0xCEB69CEB, 0xC2A86459, 0x12BAA8D1,
+      0xB6C1075E, 0xE3056A0C, 0x10D25065, 0xCB03A442,
+      0xE0EC6E0E, 0x1698DB3B, 0x4C98A0BE, 0x3278E964,
+      0x9F1F9532, 0xE0D392DF, 0xD3A0342B, 0x8971F21E,
+      0x1B0A7441, 0x4BA3348C, 0xC5BE7120, 0xC37632D8,
+      0xDF359F8D, 0x9B992F2E, 0xE60B6F47, 0x0FE3F11D,
+      0xE54CDA54, 0x1EDAD891, 0xCE6279CF, 0xCD3E7E6F,
+      0x1618B166, 0xFD2C1D05, 0x848FD2C5, 0xF6FB2299,
+      0xF523F357, 0xA6327623, 0x93A83531, 0x56CCCD02,
+      0xACF08162, 0x5A75EBB5, 0x6E163697, 0x88D273CC,
+      0xDE966292, 0x81B949D0, 0x4C50901B, 0x71C65614,
+      0xE6C6C7BD, 0x327A140A, 0x45E1D006, 0xC3F27B9A,
+      0xC9AA53FD, 0x62A80F00, 0xBB25BFE2, 0x35BDD2F6,
+      0x71126905, 0xB2040222, 0xB6CBCF7C, 0xCD769C2B,
+      0x53113EC0, 0x1640E3D3, 0x38ABBD60, 0x2547ADF0,
+      0xBA38209C, 0xF746CE76, 0x77AFA1C5, 0x20756060,
+      0x85CBFE4E, 0x8AE88DD8, 0x7AAAF9B0, 0x4CF9AA7E,
+      0x1948C25C, 0x02FB8A8C, 0x01C36AE4, 0xD6EBE1F9,
+      0x90D4F869, 0xA65CDEA0, 0x3F09252D, 0xC208E69F,
+      0xB74E6132, 0xCE77E25B, 0x578FDFE3, 0x3AC372E6 }
+};
+
+#define F(Xl, Xr, P) \
+    Xr ^=((( ctx->s[0][ Xl >> 24        ] \
+           + ctx->s[1][(Xl >> 16) & 0xFF])\
+           ^ ctx->s[2][(Xl >>  8) & 0xFF])\
+           + ctx->s[3][ Xl        & 0xFF])\
+           ^ P;
+
+AVBlowfish *av_blowfish_alloc(void)
+{
+    return av_mallocz(sizeof(struct AVBlowfish));
+}
+
+av_cold void av_blowfish_init(AVBlowfish *ctx, const uint8_t *key, int key_len)
+{
+    uint32_t data, data_l, data_r;
+    int i, j, k;
+
+    memcpy(ctx->s, orig_s, sizeof(orig_s));
+
+    j = 0;
+    for (i = 0; i < AV_BF_ROUNDS + 2; ++i) {
+        data = 0;
+        for (k = 0; k < 4; k++) {
+            data = (data << 8) | key[j];
+            if (++j >= key_len)
+                j = 0;
+        }
+        ctx->p[i] = orig_p[i] ^ data;
+    }
+
+    data_l = data_r = 0;
+
+    for (i = 0; i < AV_BF_ROUNDS + 2; i += 2) {
+        av_blowfish_crypt_ecb(ctx, &data_l, &data_r, 0);
+        ctx->p[i]     = data_l;
+        ctx->p[i + 1] = data_r;
+    }
+
+    for (i = 0; i < 4; ++i) {
+        for (j = 0; j < 256; j += 2) {
+            av_blowfish_crypt_ecb(ctx, &data_l, &data_r, 0);
+            ctx->s[i][j]     = data_l;
+            ctx->s[i][j + 1] = data_r;
+        }
+    }
+}
+
+void av_blowfish_crypt_ecb(AVBlowfish *ctx, uint32_t *xl, uint32_t *xr,
+                           int decrypt)
+{
+    uint32_t Xl, Xr;
+    int i;
+
+    Xl = *xl;
+    Xr = *xr;
+
+    if (decrypt) {
+        Xl ^= ctx->p[AV_BF_ROUNDS + 1];
+        for (i = AV_BF_ROUNDS; i > 0; i-=2) {
+            F(Xl, Xr, ctx->p[i  ]);
+            F(Xr, Xl, ctx->p[i-1]);
+        }
+
+        Xr ^= ctx->p[0];
+    } else {
+        Xl ^= ctx->p[0];
+        for (i = 1; i < AV_BF_ROUNDS+1; i+=2){
+            F(Xl, Xr, ctx->p[i  ]);
+            F(Xr, Xl, ctx->p[i+1]);
+        }
+
+        Xr ^= ctx->p[AV_BF_ROUNDS + 1];
+    }
+
+    *xl = Xr;
+    *xr = Xl;
+}
+
+void av_blowfish_crypt(AVBlowfish *ctx, uint8_t *dst, const uint8_t *src,
+                       int count, uint8_t *iv, int decrypt)
+{
+    uint32_t v0, v1;
+    int i;
+
+    if (decrypt) {
+        while (count--) {
+            v0 = AV_RB32(src);
+            v1 = AV_RB32(src + 4);
+
+            av_blowfish_crypt_ecb(ctx, &v0, &v1, decrypt);
+
+            if (iv) {
+                v0 ^= AV_RB32(iv);
+                v1 ^= AV_RB32(iv + 4);
+                memcpy(iv, src, 8);
+            }
+
+            AV_WB32(dst, v0);
+            AV_WB32(dst + 4, v1);
+
+            src   += 8;
+            dst   += 8;
+        }
+    } else {
+        while (count--) {
+            if (iv) {
+                for (i = 0; i < 8; i++)
+                    dst[i] = src[i] ^ iv[i];
+                v0 = AV_RB32(dst);
+                v1 = AV_RB32(dst + 4);
+            } else {
+                v0 = AV_RB32(src);
+                v1 = AV_RB32(src + 4);
+            }
+
+            av_blowfish_crypt_ecb(ctx, &v0, &v1, decrypt);
+
+            AV_WB32(dst, v0);
+            AV_WB32(dst + 4, v1);
+
+            if (iv)
+                memcpy(iv, dst, 8);
+
+            src   += 8;
+            dst   += 8;
+        }
+    }
+}

ffmpeg/libavutil/blowfish.h

@@ -0,0 +1,82 @@
+/*
+ * Blowfish algorithm
+ * Copyright (c) 2012 Samuel Pitoiset
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_BLOWFISH_H
+#define AVUTIL_BLOWFISH_H
+
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_blowfish Blowfish
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+#define AV_BF_ROUNDS 16
+
+typedef struct AVBlowfish {
+    uint32_t p[AV_BF_ROUNDS + 2];
+    uint32_t s[4][256];
+} AVBlowfish;
+
+/**
+ * Allocate an AVBlowfish context.
+ */
+AVBlowfish *av_blowfish_alloc(void);
+
+/**
+ * Initialize an AVBlowfish context.
+ *
+ * @param ctx an AVBlowfish context
+ * @param key a key
+ * @param key_len length of the key
+ */
+void av_blowfish_init(struct AVBlowfish *ctx, const uint8_t *key, int key_len);
+
+/**
+ * Encrypt or decrypt a buffer using a previously initialized context.
+ *
+ * @param ctx an AVBlowfish context
+ * @param xl left four bytes halves of input to be encrypted
+ * @param xr right four bytes halves of input to be encrypted
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_blowfish_crypt_ecb(struct AVBlowfish *ctx, uint32_t *xl, uint32_t *xr,
+                           int decrypt);
+
+/**
+ * Encrypt or decrypt a buffer using a previously initialized context.
+ *
+ * @param ctx an AVBlowfish context
+ * @param dst destination array, can be equal to src
+ * @param src source array, can be equal to dst
+ * @param count number of 8 byte blocks
+ * @param iv initialization vector for CBC mode, if NULL ECB will be used
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_blowfish_crypt(struct AVBlowfish *ctx, uint8_t *dst, const uint8_t *src,
+                       int count, uint8_t *iv, int decrypt);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_BLOWFISH_H */

ffmpeg/libavutil/bprint.c

@@ -0,0 +1,337 @@
+/*
+ * Copyright (c) 2012 Nicolas George
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <limits.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+#include "avstring.h"
+#include "bprint.h"
+#include "compat/va_copy.h"
+#include "error.h"
+#include "macros.h"
+#include "mem.h"
+
+#define av_bprint_room(buf) ((buf)->size - FFMIN((buf)->len, (buf)->size))
+#define av_bprint_is_allocated(buf) ((buf)->str != (buf)->reserved_internal_buffer)
+
+static int av_bprint_alloc(AVBPrint *buf, unsigned room)
+{
+    char *old_str, *new_str;
+    unsigned min_size, new_size;
+
+    if (buf->size == buf->size_max)
+        return AVERROR(EIO);
+    if (!av_bprint_is_complete(buf))
+        return AVERROR_INVALIDDATA; /* it is already truncated anyway */
+    min_size = buf->len + 1 + FFMIN(UINT_MAX - buf->len - 1, room);
+    new_size = buf->size > buf->size_max / 2 ? buf->size_max : buf->size * 2;
+    if (new_size < min_size)
+        new_size = FFMIN(buf->size_max, min_size);
+    old_str = av_bprint_is_allocated(buf) ? buf->str : NULL;
+    new_str = av_realloc(old_str, new_size);
+    if (!new_str)
+        return AVERROR(ENOMEM);
+    if (!old_str)
+        memcpy(new_str, buf->str, buf->len + 1);
+    buf->str  = new_str;
+    buf->size = new_size;
+    return 0;
+}
+
+static void av_bprint_grow(AVBPrint *buf, unsigned extra_len)
+{
+    /* arbitrary margin to avoid small overflows */
+    extra_len = FFMIN(extra_len, UINT_MAX - 5 - buf->len);
+    buf->len += extra_len;
+    if (buf->size)
+        buf->str[FFMIN(buf->len, buf->size - 1)] = 0;
+}
+
+void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
+{
+    unsigned size_auto = (char *)buf + sizeof(*buf) -
+                         buf->reserved_internal_buffer;
+
+    if (size_max == AV_BPRINT_SIZE_AUTOMATIC)
+        size_max = size_auto;
+    buf->str      = buf->reserved_internal_buffer;
+    buf->len      = 0;
+    buf->size     = FFMIN(size_auto, size_max);
+    buf->size_max = size_max;
+    *buf->str = 0;
+    if (size_init > buf->size)
+        av_bprint_alloc(buf, size_init - 1);
+}
+
+void av_bprint_init_for_buffer(AVBPrint *buf, char *buffer, unsigned size)
+{
+    if (size == 0) {
+        av_bprint_init(buf, 0, AV_BPRINT_SIZE_COUNT_ONLY);
+        return;
+    }
+
+    buf->str      = buffer;
+    buf->len      = 0;
+    buf->size     = size;
+    buf->size_max = size;
+    *buf->str = 0;
+}
+
+void av_bprintf(AVBPrint *buf, const char *fmt, ...)
+{
+    unsigned room;
+    char *dst;
+    va_list vl;
+    int extra_len;
+
+    while (1) {
+        room = av_bprint_room(buf);
+        dst = room ? buf->str + buf->len : NULL;
+        va_start(vl, fmt);
+        extra_len = vsnprintf(dst, room, fmt, vl);
+        va_end(vl);
+        if (extra_len <= 0)
+            return;
+        if (extra_len < room)
+            break;
+        if (av_bprint_alloc(buf, extra_len))
+            break;
+    }
+    av_bprint_grow(buf, extra_len);
+}
+
+void av_vbprintf(AVBPrint *buf, const char *fmt, va_list vl_arg)
+{
+    unsigned room;
+    char *dst;
+    int extra_len;
+    va_list vl;
+
+    while (1) {
+        room = av_bprint_room(buf);
+        dst = room ? buf->str + buf->len : NULL;
+        va_copy(vl, vl_arg);
+        extra_len = vsnprintf(dst, room, fmt, vl);
+        va_end(vl);
+        if (extra_len <= 0)
+            return;
+        if (extra_len < room)
+            break;
+        if (av_bprint_alloc(buf, extra_len))
+            break;
+    }
+    av_bprint_grow(buf, extra_len);
+}
+
+void av_bprint_chars(AVBPrint *buf, char c, unsigned n)
+{
+    unsigned room, real_n;
+
+    while (1) {
+        room = av_bprint_room(buf);
+        if (n < room)
+            break;
+        if (av_bprint_alloc(buf, n))
+            break;
+    }
+    if (room) {
+        real_n = FFMIN(n, room - 1);
+        memset(buf->str + buf->len, c, real_n);
+    }
+    av_bprint_grow(buf, n);
+}
+
+void av_bprint_append_data(AVBPrint *buf, const char *data, unsigned size)
+{
+    unsigned room, real_n;
+
+    while (1) {
+        room = av_bprint_room(buf);
+        if (size < room)
+            break;
+        if (av_bprint_alloc(buf, size))
+            break;
+    }
+    if (room) {
+        real_n = FFMIN(size, room - 1);
+        memcpy(buf->str + buf->len, data, real_n);
+    }
+    av_bprint_grow(buf, size);
+}
+
+void av_bprint_strftime(AVBPrint *buf, const char *fmt, const struct tm *tm)
+{
+    unsigned room;
+    size_t l;
+
+    if (!*fmt)
+        return;
+    while (1) {
+        room = av_bprint_room(buf);
+        if (room && (l = strftime(buf->str + buf->len, room, fmt, tm)))
+            break;
+        /* strftime does not tell us how much room it would need: let us
+           retry with twice as much until the buffer is large enough */
+        room = !room ? strlen(fmt) + 1 :
+               room <= INT_MAX / 2 ? room * 2 : INT_MAX;
+        if (av_bprint_alloc(buf, room)) {
+            /* impossible to grow, try to manage something useful anyway */
+            room = av_bprint_room(buf);
+            if (room < 1024) {
+                /* if strftime fails because the buffer has (almost) reached
+                   its maximum size, let us try in a local buffer; 1k should
+                   be enough to format any real date+time string */
+                char buf2[1024];
+                if ((l = strftime(buf2, sizeof(buf2), fmt, tm))) {
+                    av_bprintf(buf, "%s", buf2);
+                    return;
+                }
+            }
+            if (room) {
+                /* if anything else failed and the buffer is not already
+                   truncated, let us add a stock string and force truncation */
+                static const char txt[] = "[truncated strftime output]";
+                memset(buf->str + buf->len, '!', room);
+                memcpy(buf->str + buf->len, txt, FFMIN(sizeof(txt) - 1, room));
+                av_bprint_grow(buf, room); /* force truncation */
+            }
+            return;
+        }
+    }
+    av_bprint_grow(buf, l);
+}
+
+void av_bprint_get_buffer(AVBPrint *buf, unsigned size,
+                          unsigned char **mem, unsigned *actual_size)
+{
+    if (size > av_bprint_room(buf))
+        av_bprint_alloc(buf, size);
+    *actual_size = av_bprint_room(buf);
+    *mem = *actual_size ? buf->str + buf->len : NULL;
+}
+
+void av_bprint_clear(AVBPrint *buf)
+{
+    if (buf->len) {
+        *buf->str = 0;
+        buf->len  = 0;
+    }
+}
+
+int av_bprint_finalize(AVBPrint *buf, char **ret_str)
+{
+    unsigned real_size = FFMIN(buf->len + 1, buf->size);
+    char *str;
+    int ret = 0;
+
+    if (ret_str) {
+        if (av_bprint_is_allocated(buf)) {
+            str = av_realloc(buf->str, real_size);
+            if (!str)
+                str = buf->str;
+            buf->str = NULL;
+        } else {
+            str = av_memdup(buf->str, real_size);
+            if (!str)
+                ret = AVERROR(ENOMEM);
+        }
+        *ret_str = str;
+    } else {
+        if (av_bprint_is_allocated(buf))
+            av_freep(&buf->str);
+    }
+    buf->size = real_size;
+    return ret;
+}
+
+#define WHITESPACES " \n\t\r"
+
+void av_bprint_escape(AVBPrint *dstbuf, const char *src, const char *special_chars,
+                      enum AVEscapeMode mode, int flags)
+{
+    const char *src0 = src;
+
+    if (mode == AV_ESCAPE_MODE_AUTO)
+        mode = AV_ESCAPE_MODE_BACKSLASH; /* TODO: implement a heuristic */
+
+    switch (mode) {
+    case AV_ESCAPE_MODE_QUOTE:
+        /* enclose the string between '' */
+        av_bprint_chars(dstbuf, '\'', 1);
+        for (; *src; src++) {
+            if (*src == '\'')
+                av_bprintf(dstbuf, "'\\''");
+            else
+                av_bprint_chars(dstbuf, *src, 1);
+        }
+        av_bprint_chars(dstbuf, '\'', 1);
+        break;
+
+    case AV_ESCAPE_MODE_XML:
+        /* escape XML non-markup character data as per 2.4 by default: */
+        /*  [^<&]* - ([^<&]* ']]>' [^<&]*) */
+
+        /* additionally, given one of the AV_ESCAPE_FLAG_XML_* flags, */
+        /* escape those specific characters as required. */
+        for (; *src; src++) {
+            switch (*src) {
+            case '&' : av_bprintf(dstbuf, "%s", "&amp;");  break;
+            case '<' : av_bprintf(dstbuf, "%s", "&lt;");   break;
+            case '>' : av_bprintf(dstbuf, "%s", "&gt;");   break;
+            case '\'':
+                if (!(flags & AV_ESCAPE_FLAG_XML_SINGLE_QUOTES))
+                    goto XML_DEFAULT_HANDLING;
+
+                av_bprintf(dstbuf, "%s", "&apos;");
+                break;
+            case '"' :
+                if (!(flags & AV_ESCAPE_FLAG_XML_DOUBLE_QUOTES))
+                    goto XML_DEFAULT_HANDLING;
+
+                av_bprintf(dstbuf, "%s", "&quot;");
+                break;
+XML_DEFAULT_HANDLING:
+            default: av_bprint_chars(dstbuf, *src, 1);
+            }
+        }
+        break;
+
+    /* case AV_ESCAPE_MODE_BACKSLASH or unknown mode */
+    default:
+        /* \-escape characters */
+        for (; *src; src++) {
+            int is_first_last       = src == src0 || !*(src+1);
+            int is_ws               = !!strchr(WHITESPACES, *src);
+            int is_strictly_special = special_chars && strchr(special_chars, *src);
+            int is_special          =
+                is_strictly_special || strchr("'\\", *src) ||
+                (is_ws && (flags & AV_ESCAPE_FLAG_WHITESPACE));
+
+            if (is_strictly_special ||
+                (!(flags & AV_ESCAPE_FLAG_STRICT) &&
+                 (is_special || (is_ws && is_first_last))))
+                av_bprint_chars(dstbuf, '\\', 1);
+            av_bprint_chars(dstbuf, *src, 1);
+        }
+        break;
+    }
+}

ffmpeg/libavutil/bprint.h

@@ -0,0 +1,254 @@
+/*
+ * Copyright (c) 2012 Nicolas George
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_avbprint
+ * AVBPrint public header
+ */
+
+#ifndef AVUTIL_BPRINT_H
+#define AVUTIL_BPRINT_H
+
+#include <stdarg.h>
+
+#include "attributes.h"
+#include "avstring.h"
+
+/**
+ * @defgroup lavu_avbprint AVBPrint
+ * @ingroup lavu_data
+ *
+ * A buffer to print data progressively
+ * @{
+ */
+
+/**
+ * Define a structure with extra padding to a fixed size
+ * This helps ensuring binary compatibility with future versions.
+ */
+
+#define FF_PAD_STRUCTURE(name, size, ...) \
+struct ff_pad_helper_##name { __VA_ARGS__ }; \
+typedef struct name { \
+    __VA_ARGS__ \
+    char reserved_padding[size - sizeof(struct ff_pad_helper_##name)]; \
+} name;
+
+/**
+ * Buffer to print data progressively
+ *
+ * The string buffer grows as necessary and is always 0-terminated.
+ * The content of the string is never accessed, and thus is
+ * encoding-agnostic and can even hold binary data.
+ *
+ * Small buffers are kept in the structure itself, and thus require no
+ * memory allocation at all (unless the contents of the buffer is needed
+ * after the structure goes out of scope). This is almost as lightweight as
+ * declaring a local `char buf[512]`.
+ *
+ * The length of the string can go beyond the allocated size: the buffer is
+ * then truncated, but the functions still keep account of the actual total
+ * length.
+ *
+ * In other words, AVBPrint.len can be greater than AVBPrint.size and records
+ * the total length of what would have been to the buffer if there had been
+ * enough memory.
+ *
+ * Append operations do not need to be tested for failure: if a memory
+ * allocation fails, data stop being appended to the buffer, but the length
+ * is still updated. This situation can be tested with
+ * av_bprint_is_complete().
+ *
+ * The AVBPrint.size_max field determines several possible behaviours:
+ * - `size_max = -1` (= `UINT_MAX`) or any large value will let the buffer be
+ *   reallocated as necessary, with an amortized linear cost.
+ * - `size_max = 0` prevents writing anything to the buffer: only the total
+ *   length is computed. The write operations can then possibly be repeated in
+ *   a buffer with exactly the necessary size
+ *   (using `size_init = size_max = len + 1`).
+ * - `size_max = 1` is automatically replaced by the exact size available in the
+ *   structure itself, thus ensuring no dynamic memory allocation. The
+ *   internal buffer is large enough to hold a reasonable paragraph of text,
+ *   such as the current paragraph.
+ */
+
+FF_PAD_STRUCTURE(AVBPrint, 1024,
+    char *str;         /**< string so far */
+    unsigned len;      /**< length so far */
+    unsigned size;     /**< allocated memory */
+    unsigned size_max; /**< maximum allocated memory */
+    char reserved_internal_buffer[1];
+)
+
+/**
+ * @name Max size special values
+ * Convenience macros for special values for av_bprint_init() size_max
+ * parameter.
+ * @{
+ */
+
+/**
+ * Buffer will be reallocated as necessary, with an amortized linear cost.
+ */
+#define AV_BPRINT_SIZE_UNLIMITED  ((unsigned)-1)
+/**
+ * Use the exact size available in the AVBPrint structure itself.
+ *
+ * Thus ensuring no dynamic memory allocation. The internal buffer is large
+ * enough to hold a reasonable paragraph of text, such as the current paragraph.
+ */
+#define AV_BPRINT_SIZE_AUTOMATIC  1
+/**
+ * Do not write anything to the buffer, only calculate the total length.
+ *
+ * The write operations can then possibly be repeated in a buffer with
+ * exactly the necessary size (using `size_init = size_max = AVBPrint.len + 1`).
+ */
+#define AV_BPRINT_SIZE_COUNT_ONLY 0
+/** @} */
+
+/**
+ * Init a print buffer.
+ *
+ * @param buf        buffer to init
+ * @param size_init  initial size (including the final 0)
+ * @param size_max   maximum size;
+ *                   - `0` means do not write anything, just count the length
+ *                   - `1` is replaced by the maximum value for automatic storage
+ *                       any large value means that the internal buffer will be
+ *                       reallocated as needed up to that limit
+ *                   - `-1` is converted to `UINT_MAX`, the largest limit possible.
+ *                   Check also `AV_BPRINT_SIZE_*` macros.
+ */
+void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max);
+
+/**
+ * Init a print buffer using a pre-existing buffer.
+ *
+ * The buffer will not be reallocated.
+ * In case size equals zero, the AVBPrint will be initialized to use
+ * the internal buffer as if using AV_BPRINT_SIZE_COUNT_ONLY with
+ * av_bprint_init().
+ *
+ * @param buf     buffer structure to init
+ * @param buffer  byte buffer to use for the string data
+ * @param size    size of buffer
+ */
+void av_bprint_init_for_buffer(AVBPrint *buf, char *buffer, unsigned size);
+
+/**
+ * Append a formatted string to a print buffer.
+ */
+void av_bprintf(AVBPrint *buf, const char *fmt, ...) av_printf_format(2, 3);
+
+/**
+ * Append a formatted string to a print buffer.
+ */
+void av_vbprintf(AVBPrint *buf, const char *fmt, va_list vl_arg);
+
+/**
+ * Append char c n times to a print buffer.
+ */
+void av_bprint_chars(AVBPrint *buf, char c, unsigned n);
+
+/**
+ * Append data to a print buffer.
+ *
+ * @param buf  bprint buffer to use
+ * @param data pointer to data
+ * @param size size of data
+ */
+void av_bprint_append_data(AVBPrint *buf, const char *data, unsigned size);
+
+struct tm;
+/**
+ * Append a formatted date and time to a print buffer.
+ *
+ * @param buf  bprint buffer to use
+ * @param fmt  date and time format string, see strftime()
+ * @param tm   broken-down time structure to translate
+ *
+ * @note due to poor design of the standard strftime function, it may
+ * produce poor results if the format string expands to a very long text and
+ * the bprint buffer is near the limit stated by the size_max option.
+ */
+void av_bprint_strftime(AVBPrint *buf, const char *fmt, const struct tm *tm);
+
+/**
+ * Allocate bytes in the buffer for external use.
+ *
+ * @param[in]  buf          buffer structure
+ * @param[in]  size         required size
+ * @param[out] mem          pointer to the memory area
+ * @param[out] actual_size  size of the memory area after allocation;
+ *                          can be larger or smaller than size
+ */
+void av_bprint_get_buffer(AVBPrint *buf, unsigned size,
+                          unsigned char **mem, unsigned *actual_size);
+
+/**
+ * Reset the string to "" but keep internal allocated data.
+ */
+void av_bprint_clear(AVBPrint *buf);
+
+/**
+ * Test if the print buffer is complete (not truncated).
+ *
+ * It may have been truncated due to a memory allocation failure
+ * or the size_max limit (compare size and size_max if necessary).
+ */
+static inline int av_bprint_is_complete(const AVBPrint *buf)
+{
+    return buf->len < buf->size;
+}
+
+/**
+ * Finalize a print buffer.
+ *
+ * The print buffer can no longer be used afterwards,
+ * but the len and size fields are still valid.
+ *
+ * @arg[out] ret_str  if not NULL, used to return a permanent copy of the
+ *                    buffer contents, or NULL if memory allocation fails;
+ *                    if NULL, the buffer is discarded and freed
+ * @return  0 for success or error code (probably AVERROR(ENOMEM))
+ */
+int av_bprint_finalize(AVBPrint *buf, char **ret_str);
+
+/**
+ * Escape the content in src and append it to dstbuf.
+ *
+ * @param dstbuf        already inited destination bprint buffer
+ * @param src           string containing the text to escape
+ * @param special_chars string containing the special characters which
+ *                      need to be escaped, can be NULL
+ * @param mode          escape mode to employ, see AV_ESCAPE_MODE_* macros.
+ *                      Any unknown value for mode will be considered equivalent to
+ *                      AV_ESCAPE_MODE_BACKSLASH, but this behaviour can change without
+ *                      notice.
+ * @param flags         flags which control how to escape, see AV_ESCAPE_FLAG_* macros
+ */
+void av_bprint_escape(AVBPrint *dstbuf, const char *src, const char *special_chars,
+                      enum AVEscapeMode mode, int flags);
+
+/** @} */
+
+#endif /* AVUTIL_BPRINT_H */

ffmpeg/libavutil/bswap.h

@@ -0,0 +1,105 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * byte swapping routines
+ */
+
+#ifndef AVUTIL_BSWAP_H
+#define AVUTIL_BSWAP_H
+
+#include <stdint.h>
+#include "libavutil/avconfig.h"
+#include "attributes.h"
+
+#ifdef HAVE_AV_CONFIG_H
+
+#include "config.h"
+
+#if ARCH_ARM
+#   include "arm/bswap.h"
+#elif ARCH_RISCV
+#   include "riscv/bswap.h"
+#elif ARCH_X86
+#   include "x86/bswap.h"
+#endif
+
+#endif /* HAVE_AV_CONFIG_H */
+
+#define AV_BSWAP16C(x) (((x) << 8 & 0xff00)  | ((x) >> 8 & 0x00ff))
+#define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16))
+#define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32))
+
+#define AV_BSWAPC(s, x) AV_BSWAP##s##C(x)
+
+#ifndef av_bswap16
+static av_always_inline av_const uint16_t av_bswap16(uint16_t x)
+{
+    x= (x>>8) | (x<<8);
+    return x;
+}
+#endif
+
+#ifndef av_bswap32
+static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
+{
+    return AV_BSWAP32C(x);
+}
+#endif
+
+#ifndef av_bswap64
+static inline uint64_t av_const av_bswap64(uint64_t x)
+{
+    return (uint64_t)av_bswap32(x) << 32 | av_bswap32(x >> 32);
+}
+#endif
+
+// be2ne ... big-endian to native-endian
+// le2ne ... little-endian to native-endian
+
+#if AV_HAVE_BIGENDIAN
+#define av_be2ne16(x) (x)
+#define av_be2ne32(x) (x)
+#define av_be2ne64(x) (x)
+#define av_le2ne16(x) av_bswap16(x)
+#define av_le2ne32(x) av_bswap32(x)
+#define av_le2ne64(x) av_bswap64(x)
+#define AV_BE2NEC(s, x) (x)
+#define AV_LE2NEC(s, x) AV_BSWAPC(s, x)
+#else
+#define av_be2ne16(x) av_bswap16(x)
+#define av_be2ne32(x) av_bswap32(x)
+#define av_be2ne64(x) av_bswap64(x)
+#define av_le2ne16(x) (x)
+#define av_le2ne32(x) (x)
+#define av_le2ne64(x) (x)
+#define AV_BE2NEC(s, x) AV_BSWAPC(s, x)
+#define AV_LE2NEC(s, x) (x)
+#endif
+
+#define AV_BE2NE16C(x) AV_BE2NEC(16, x)
+#define AV_BE2NE32C(x) AV_BE2NEC(32, x)
+#define AV_BE2NE64C(x) AV_BE2NEC(64, x)
+#define AV_LE2NE16C(x) AV_LE2NEC(16, x)
+#define AV_LE2NE32C(x) AV_LE2NEC(32, x)
+#define AV_LE2NE64C(x) AV_LE2NEC(64, x)
+
+#endif /* AVUTIL_BSWAP_H */

ffmpeg/libavutil/buffer.c

@@ -0,0 +1,422 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdatomic.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "avassert.h"
+#include "buffer_internal.h"
+#include "common.h"
+#include "mem.h"
+#include "thread.h"
+
+static AVBufferRef *buffer_create(AVBuffer *buf, uint8_t *data, size_t size,
+                                  void (*free)(void *opaque, uint8_t *data),
+                                  void *opaque, int flags)
+{
+    AVBufferRef *ref = NULL;
+
+    buf->data     = data;
+    buf->size     = size;
+    buf->free     = free ? free : av_buffer_default_free;
+    buf->opaque   = opaque;
+
+    atomic_init(&buf->refcount, 1);
+
+    buf->flags = flags;
+
+    ref = av_mallocz(sizeof(*ref));
+    if (!ref)
+        return NULL;
+
+    ref->buffer = buf;
+    ref->data   = data;
+    ref->size   = size;
+
+    return ref;
+}
+
+AVBufferRef *av_buffer_create(uint8_t *data, size_t size,
+                              void (*free)(void *opaque, uint8_t *data),
+                              void *opaque, int flags)
+{
+    AVBufferRef *ret;
+    AVBuffer *buf = av_mallocz(sizeof(*buf));
+    if (!buf)
+        return NULL;
+
+    ret = buffer_create(buf, data, size, free, opaque, flags);
+    if (!ret) {
+        av_free(buf);
+        return NULL;
+    }
+    return ret;
+}
+
+void av_buffer_default_free(void *opaque, uint8_t *data)
+{
+    av_free(data);
+}
+
+AVBufferRef *av_buffer_alloc(size_t size)
+{
+    AVBufferRef *ret = NULL;
+    uint8_t    *data = NULL;
+
+    data = av_malloc(size);
+    if (!data)
+        return NULL;
+
+    ret = av_buffer_create(data, size, av_buffer_default_free, NULL, 0);
+    if (!ret)
+        av_freep(&data);
+
+    return ret;
+}
+
+AVBufferRef *av_buffer_allocz(size_t size)
+{
+    AVBufferRef *ret = av_buffer_alloc(size);
+    if (!ret)
+        return NULL;
+
+    memset(ret->data, 0, size);
+    return ret;
+}
+
+AVBufferRef *av_buffer_ref(const AVBufferRef *buf)
+{
+    AVBufferRef *ret = av_mallocz(sizeof(*ret));
+
+    if (!ret)
+        return NULL;
+
+    *ret = *buf;
+
+    atomic_fetch_add_explicit(&buf->buffer->refcount, 1, memory_order_relaxed);
+
+    return ret;
+}
+
+static void buffer_replace(AVBufferRef **dst, AVBufferRef **src)
+{
+    AVBuffer *b;
+
+    b = (*dst)->buffer;
+
+    if (src) {
+        **dst = **src;
+        av_freep(src);
+    } else
+        av_freep(dst);
+
+    if (atomic_fetch_sub_explicit(&b->refcount, 1, memory_order_acq_rel) == 1) {
+        /* b->free below might already free the structure containing *b,
+         * so we have to read the flag now to avoid use-after-free. */
+        int free_avbuffer = !(b->flags_internal & BUFFER_FLAG_NO_FREE);
+        b->free(b->opaque, b->data);
+        if (free_avbuffer)
+            av_free(b);
+    }
+}
+
+void av_buffer_unref(AVBufferRef **buf)
+{
+    if (!buf || !*buf)
+        return;
+
+    buffer_replace(buf, NULL);
+}
+
+int av_buffer_is_writable(const AVBufferRef *buf)
+{
+    if (buf->buffer->flags & AV_BUFFER_FLAG_READONLY)
+        return 0;
+
+    return atomic_load(&buf->buffer->refcount) == 1;
+}
+
+void *av_buffer_get_opaque(const AVBufferRef *buf)
+{
+    return buf->buffer->opaque;
+}
+
+int av_buffer_get_ref_count(const AVBufferRef *buf)
+{
+    return atomic_load(&buf->buffer->refcount);
+}
+
+int av_buffer_make_writable(AVBufferRef **pbuf)
+{
+    AVBufferRef *newbuf, *buf = *pbuf;
+
+    if (av_buffer_is_writable(buf))
+        return 0;
+
+    newbuf = av_buffer_alloc(buf->size);
+    if (!newbuf)
+        return AVERROR(ENOMEM);
+
+    memcpy(newbuf->data, buf->data, buf->size);
+
+    buffer_replace(pbuf, &newbuf);
+
+    return 0;
+}
+
+int av_buffer_realloc(AVBufferRef **pbuf, size_t size)
+{
+    AVBufferRef *buf = *pbuf;
+    uint8_t *tmp;
+    int ret;
+
+    if (!buf) {
+        /* allocate a new buffer with av_realloc(), so it will be reallocatable
+         * later */
+        uint8_t *data = av_realloc(NULL, size);
+        if (!data)
+            return AVERROR(ENOMEM);
+
+        buf = av_buffer_create(data, size, av_buffer_default_free, NULL, 0);
+        if (!buf) {
+            av_freep(&data);
+            return AVERROR(ENOMEM);
+        }
+
+        buf->buffer->flags_internal |= BUFFER_FLAG_REALLOCATABLE;
+        *pbuf = buf;
+
+        return 0;
+    } else if (buf->size == size)
+        return 0;
+
+    if (!(buf->buffer->flags_internal & BUFFER_FLAG_REALLOCATABLE) ||
+        !av_buffer_is_writable(buf) || buf->data != buf->buffer->data) {
+        /* cannot realloc, allocate a new reallocable buffer and copy data */
+        AVBufferRef *new = NULL;
+
+        ret = av_buffer_realloc(&new, size);
+        if (ret < 0)
+            return ret;
+
+        memcpy(new->data, buf->data, FFMIN(size, buf->size));
+
+        buffer_replace(pbuf, &new);
+        return 0;
+    }
+
+    tmp = av_realloc(buf->buffer->data, size);
+    if (!tmp)
+        return AVERROR(ENOMEM);
+
+    buf->buffer->data = buf->data = tmp;
+    buf->buffer->size = buf->size = size;
+    return 0;
+}
+
+int av_buffer_replace(AVBufferRef **pdst, const AVBufferRef *src)
+{
+    AVBufferRef *dst = *pdst;
+    AVBufferRef *tmp;
+
+    if (!src) {
+        av_buffer_unref(pdst);
+        return 0;
+    }
+
+    if (dst && dst->buffer == src->buffer) {
+        /* make sure the data pointers match */
+        dst->data = src->data;
+        dst->size = src->size;
+        return 0;
+    }
+
+    tmp = av_buffer_ref(src);
+    if (!tmp)
+        return AVERROR(ENOMEM);
+
+    av_buffer_unref(pdst);
+    *pdst = tmp;
+    return 0;
+}
+
+AVBufferPool *av_buffer_pool_init2(size_t size, void *opaque,
+                                   AVBufferRef* (*alloc)(void *opaque, size_t size),
+                                   void (*pool_free)(void *opaque))
+{
+    AVBufferPool *pool = av_mallocz(sizeof(*pool));
+    if (!pool)
+        return NULL;
+
+    if (ff_mutex_init(&pool->mutex, NULL)) {
+        av_free(pool);
+        return NULL;
+    }
+
+    pool->size      = size;
+    pool->opaque    = opaque;
+    pool->alloc2    = alloc;
+    pool->alloc     = av_buffer_alloc; // fallback
+    pool->pool_free = pool_free;
+
+    atomic_init(&pool->refcount, 1);
+
+    return pool;
+}
+
+AVBufferPool *av_buffer_pool_init(size_t size, AVBufferRef* (*alloc)(size_t size))
+{
+    AVBufferPool *pool = av_mallocz(sizeof(*pool));
+    if (!pool)
+        return NULL;
+
+    if (ff_mutex_init(&pool->mutex, NULL)) {
+        av_free(pool);
+        return NULL;
+    }
+
+    pool->size     = size;
+    pool->alloc    = alloc ? alloc : av_buffer_alloc;
+
+    atomic_init(&pool->refcount, 1);
+
+    return pool;
+}
+
+static void buffer_pool_flush(AVBufferPool *pool)
+{
+    while (pool->pool) {
+        BufferPoolEntry *buf = pool->pool;
+        pool->pool = buf->next;
+
+        buf->free(buf->opaque, buf->data);
+        av_freep(&buf);
+    }
+}
+
+/*
+ * This function gets called when the pool has been uninited and
+ * all the buffers returned to it.
+ */
+static void buffer_pool_free(AVBufferPool *pool)
+{
+    buffer_pool_flush(pool);
+    ff_mutex_destroy(&pool->mutex);
+
+    if (pool->pool_free)
+        pool->pool_free(pool->opaque);
+
+    av_freep(&pool);
+}
+
+void av_buffer_pool_uninit(AVBufferPool **ppool)
+{
+    AVBufferPool *pool;
+
+    if (!ppool || !*ppool)
+        return;
+    pool   = *ppool;
+    *ppool = NULL;
+
+    ff_mutex_lock(&pool->mutex);
+    buffer_pool_flush(pool);
+    ff_mutex_unlock(&pool->mutex);
+
+    if (atomic_fetch_sub_explicit(&pool->refcount, 1, memory_order_acq_rel) == 1)
+        buffer_pool_free(pool);
+}
+
+static void pool_release_buffer(void *opaque, uint8_t *data)
+{
+    BufferPoolEntry *buf = opaque;
+    AVBufferPool *pool = buf->pool;
+
+    ff_mutex_lock(&pool->mutex);
+    buf->next = pool->pool;
+    pool->pool = buf;
+    ff_mutex_unlock(&pool->mutex);
+
+    if (atomic_fetch_sub_explicit(&pool->refcount, 1, memory_order_acq_rel) == 1)
+        buffer_pool_free(pool);
+}
+
+/* allocate a new buffer and override its free() callback so that
+ * it is returned to the pool on free */
+static AVBufferRef *pool_alloc_buffer(AVBufferPool *pool)
+{
+    BufferPoolEntry *buf;
+    AVBufferRef     *ret;
+
+    av_assert0(pool->alloc || pool->alloc2);
+
+    ret = pool->alloc2 ? pool->alloc2(pool->opaque, pool->size) :
+                         pool->alloc(pool->size);
+    if (!ret)
+        return NULL;
+
+    buf = av_mallocz(sizeof(*buf));
+    if (!buf) {
+        av_buffer_unref(&ret);
+        return NULL;
+    }
+
+    buf->data   = ret->buffer->data;
+    buf->opaque = ret->buffer->opaque;
+    buf->free   = ret->buffer->free;
+    buf->pool   = pool;
+
+    ret->buffer->opaque = buf;
+    ret->buffer->free   = pool_release_buffer;
+
+    return ret;
+}
+
+AVBufferRef *av_buffer_pool_get(AVBufferPool *pool)
+{
+    AVBufferRef *ret;
+    BufferPoolEntry *buf;
+
+    ff_mutex_lock(&pool->mutex);
+    buf = pool->pool;
+    if (buf) {
+        memset(&buf->buffer, 0, sizeof(buf->buffer));
+        ret = buffer_create(&buf->buffer, buf->data, pool->size,
+                            pool_release_buffer, buf, 0);
+        if (ret) {
+            pool->pool = buf->next;
+            buf->next = NULL;
+            buf->buffer.flags_internal |= BUFFER_FLAG_NO_FREE;
+        }
+    } else {
+        ret = pool_alloc_buffer(pool);
+    }
+    ff_mutex_unlock(&pool->mutex);
+
+    if (ret)
+        atomic_fetch_add_explicit(&pool->refcount, 1, memory_order_relaxed);
+
+    return ret;
+}
+
+void *av_buffer_pool_buffer_get_opaque(const AVBufferRef *ref)
+{
+    BufferPoolEntry *buf = ref->buffer->opaque;
+    av_assert0(buf);
+    return buf->opaque;
+}

ffmpeg/libavutil/buffer.h

@@ -0,0 +1,322 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_buffer
+ * refcounted data buffer API
+ */
+
+#ifndef AVUTIL_BUFFER_H
+#define AVUTIL_BUFFER_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_buffer AVBuffer
+ * @ingroup lavu_data
+ *
+ * @{
+ * AVBuffer is an API for reference-counted data buffers.
+ *
+ * There are two core objects in this API -- AVBuffer and AVBufferRef. AVBuffer
+ * represents the data buffer itself; it is opaque and not meant to be accessed
+ * by the caller directly, but only through AVBufferRef. However, the caller may
+ * e.g. compare two AVBuffer pointers to check whether two different references
+ * are describing the same data buffer. AVBufferRef represents a single
+ * reference to an AVBuffer and it is the object that may be manipulated by the
+ * caller directly.
+ *
+ * There are two functions provided for creating a new AVBuffer with a single
+ * reference -- av_buffer_alloc() to just allocate a new buffer, and
+ * av_buffer_create() to wrap an existing array in an AVBuffer. From an existing
+ * reference, additional references may be created with av_buffer_ref().
+ * Use av_buffer_unref() to free a reference (this will automatically free the
+ * data once all the references are freed).
+ *
+ * The convention throughout this API and the rest of FFmpeg is such that the
+ * buffer is considered writable if there exists only one reference to it (and
+ * it has not been marked as read-only). The av_buffer_is_writable() function is
+ * provided to check whether this is true and av_buffer_make_writable() will
+ * automatically create a new writable buffer when necessary.
+ * Of course nothing prevents the calling code from violating this convention,
+ * however that is safe only when all the existing references are under its
+ * control.
+ *
+ * @note Referencing and unreferencing the buffers is thread-safe and thus
+ * may be done from multiple threads simultaneously without any need for
+ * additional locking.
+ *
+ * @note Two different references to the same buffer can point to different
+ * parts of the buffer (i.e. their AVBufferRef.data will not be equal).
+ */
+
+/**
+ * A reference counted buffer type. It is opaque and is meant to be used through
+ * references (AVBufferRef).
+ */
+typedef struct AVBuffer AVBuffer;
+
+/**
+ * A reference to a data buffer.
+ *
+ * The size of this struct is not a part of the public ABI and it is not meant
+ * to be allocated directly.
+ */
+typedef struct AVBufferRef {
+    AVBuffer *buffer;
+
+    /**
+     * The data buffer. It is considered writable if and only if
+     * this is the only reference to the buffer, in which case
+     * av_buffer_is_writable() returns 1.
+     */
+    uint8_t *data;
+    /**
+     * Size of data in bytes.
+     */
+    size_t   size;
+} AVBufferRef;
+
+/**
+ * Allocate an AVBuffer of the given size using av_malloc().
+ *
+ * @return an AVBufferRef of given size or NULL when out of memory
+ */
+AVBufferRef *av_buffer_alloc(size_t size);
+
+/**
+ * Same as av_buffer_alloc(), except the returned buffer will be initialized
+ * to zero.
+ */
+AVBufferRef *av_buffer_allocz(size_t size);
+
+/**
+ * Always treat the buffer as read-only, even when it has only one
+ * reference.
+ */
+#define AV_BUFFER_FLAG_READONLY (1 << 0)
+
+/**
+ * Create an AVBuffer from an existing array.
+ *
+ * If this function is successful, data is owned by the AVBuffer. The caller may
+ * only access data through the returned AVBufferRef and references derived from
+ * it.
+ * If this function fails, data is left untouched.
+ * @param data   data array
+ * @param size   size of data in bytes
+ * @param free   a callback for freeing this buffer's data
+ * @param opaque parameter to be got for processing or passed to free
+ * @param flags  a combination of AV_BUFFER_FLAG_*
+ *
+ * @return an AVBufferRef referring to data on success, NULL on failure.
+ */
+AVBufferRef *av_buffer_create(uint8_t *data, size_t size,
+                              void (*free)(void *opaque, uint8_t *data),
+                              void *opaque, int flags);
+
+/**
+ * Default free callback, which calls av_free() on the buffer data.
+ * This function is meant to be passed to av_buffer_create(), not called
+ * directly.
+ */
+void av_buffer_default_free(void *opaque, uint8_t *data);
+
+/**
+ * Create a new reference to an AVBuffer.
+ *
+ * @return a new AVBufferRef referring to the same AVBuffer as buf or NULL on
+ * failure.
+ */
+AVBufferRef *av_buffer_ref(const AVBufferRef *buf);
+
+/**
+ * Free a given reference and automatically free the buffer if there are no more
+ * references to it.
+ *
+ * @param buf the reference to be freed. The pointer is set to NULL on return.
+ */
+void av_buffer_unref(AVBufferRef **buf);
+
+/**
+ * @return 1 if the caller may write to the data referred to by buf (which is
+ * true if and only if buf is the only reference to the underlying AVBuffer).
+ * Return 0 otherwise.
+ * A positive answer is valid until av_buffer_ref() is called on buf.
+ */
+int av_buffer_is_writable(const AVBufferRef *buf);
+
+/**
+ * @return the opaque parameter set by av_buffer_create.
+ */
+void *av_buffer_get_opaque(const AVBufferRef *buf);
+
+int av_buffer_get_ref_count(const AVBufferRef *buf);
+
+/**
+ * Create a writable reference from a given buffer reference, avoiding data copy
+ * if possible.
+ *
+ * @param buf buffer reference to make writable. On success, buf is either left
+ *            untouched, or it is unreferenced and a new writable AVBufferRef is
+ *            written in its place. On failure, buf is left untouched.
+ * @return 0 on success, a negative AVERROR on failure.
+ */
+int av_buffer_make_writable(AVBufferRef **buf);
+
+/**
+ * Reallocate a given buffer.
+ *
+ * @param buf  a buffer reference to reallocate. On success, buf will be
+ *             unreferenced and a new reference with the required size will be
+ *             written in its place. On failure buf will be left untouched. *buf
+ *             may be NULL, then a new buffer is allocated.
+ * @param size required new buffer size.
+ * @return 0 on success, a negative AVERROR on failure.
+ *
+ * @note the buffer is actually reallocated with av_realloc() only if it was
+ * initially allocated through av_buffer_realloc(NULL) and there is only one
+ * reference to it (i.e. the one passed to this function). In all other cases
+ * a new buffer is allocated and the data is copied.
+ */
+int av_buffer_realloc(AVBufferRef **buf, size_t size);
+
+/**
+ * Ensure dst refers to the same data as src.
+ *
+ * When *dst is already equivalent to src, do nothing. Otherwise unreference dst
+ * and replace it with a new reference to src.
+ *
+ * @param dst Pointer to either a valid buffer reference or NULL. On success,
+ *            this will point to a buffer reference equivalent to src. On
+ *            failure, dst will be left untouched.
+ * @param src A buffer reference to replace dst with. May be NULL, then this
+ *            function is equivalent to av_buffer_unref(dst).
+ * @return 0 on success
+ *         AVERROR(ENOMEM) on memory allocation failure.
+ */
+int av_buffer_replace(AVBufferRef **dst, const AVBufferRef *src);
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lavu_bufferpool AVBufferPool
+ * @ingroup lavu_data
+ *
+ * @{
+ * AVBufferPool is an API for a lock-free thread-safe pool of AVBuffers.
+ *
+ * Frequently allocating and freeing large buffers may be slow. AVBufferPool is
+ * meant to solve this in cases when the caller needs a set of buffers of the
+ * same size (the most obvious use case being buffers for raw video or audio
+ * frames).
+ *
+ * At the beginning, the user must call av_buffer_pool_init() to create the
+ * buffer pool. Then whenever a buffer is needed, call av_buffer_pool_get() to
+ * get a reference to a new buffer, similar to av_buffer_alloc(). This new
+ * reference works in all aspects the same way as the one created by
+ * av_buffer_alloc(). However, when the last reference to this buffer is
+ * unreferenced, it is returned to the pool instead of being freed and will be
+ * reused for subsequent av_buffer_pool_get() calls.
+ *
+ * When the caller is done with the pool and no longer needs to allocate any new
+ * buffers, av_buffer_pool_uninit() must be called to mark the pool as freeable.
+ * Once all the buffers are released, it will automatically be freed.
+ *
+ * Allocating and releasing buffers with this API is thread-safe as long as
+ * either the default alloc callback is used, or the user-supplied one is
+ * thread-safe.
+ */
+
+/**
+ * The buffer pool. This structure is opaque and not meant to be accessed
+ * directly. It is allocated with av_buffer_pool_init() and freed with
+ * av_buffer_pool_uninit().
+ */
+typedef struct AVBufferPool AVBufferPool;
+
+/**
+ * Allocate and initialize a buffer pool.
+ *
+ * @param size size of each buffer in this pool
+ * @param alloc a function that will be used to allocate new buffers when the
+ * pool is empty. May be NULL, then the default allocator will be used
+ * (av_buffer_alloc()).
+ * @return newly created buffer pool on success, NULL on error.
+ */
+AVBufferPool *av_buffer_pool_init(size_t size, AVBufferRef* (*alloc)(size_t size));
+
+/**
+ * Allocate and initialize a buffer pool with a more complex allocator.
+ *
+ * @param size size of each buffer in this pool
+ * @param opaque arbitrary user data used by the allocator
+ * @param alloc a function that will be used to allocate new buffers when the
+ *              pool is empty. May be NULL, then the default allocator will be
+ *              used (av_buffer_alloc()).
+ * @param pool_free a function that will be called immediately before the pool
+ *                  is freed. I.e. after av_buffer_pool_uninit() is called
+ *                  by the caller and all the frames are returned to the pool
+ *                  and freed. It is intended to uninitialize the user opaque
+ *                  data. May be NULL.
+ * @return newly created buffer pool on success, NULL on error.
+ */
+AVBufferPool *av_buffer_pool_init2(size_t size, void *opaque,
+                                   AVBufferRef* (*alloc)(void *opaque, size_t size),
+                                   void (*pool_free)(void *opaque));
+
+/**
+ * Mark the pool as being available for freeing. It will actually be freed only
+ * once all the allocated buffers associated with the pool are released. Thus it
+ * is safe to call this function while some of the allocated buffers are still
+ * in use.
+ *
+ * @param pool pointer to the pool to be freed. It will be set to NULL.
+ */
+void av_buffer_pool_uninit(AVBufferPool **pool);
+
+/**
+ * Allocate a new AVBuffer, reusing an old buffer from the pool when available.
+ * This function may be called simultaneously from multiple threads.
+ *
+ * @return a reference to the new buffer on success, NULL on error.
+ */
+AVBufferRef *av_buffer_pool_get(AVBufferPool *pool);
+
+/**
+ * Query the original opaque parameter of an allocated buffer in the pool.
+ *
+ * @param ref a buffer reference to a buffer returned by av_buffer_pool_get.
+ * @return the opaque parameter set by the buffer allocator function of the
+ *         buffer pool.
+ *
+ * @note the opaque parameter of ref is used by the buffer pool implementation,
+ * therefore you have to use this function to access the original opaque
+ * parameter of an allocated buffer.
+ */
+void *av_buffer_pool_buffer_get_opaque(const AVBufferRef *ref);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_BUFFER_H */

ffmpeg/libavutil/buffer_internal.h

@@ -0,0 +1,110 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_BUFFER_INTERNAL_H
+#define AVUTIL_BUFFER_INTERNAL_H
+
+#include <stdatomic.h>
+#include <stdint.h>
+
+#include "buffer.h"
+#include "thread.h"
+
+/**
+ * The buffer was av_realloc()ed, so it is reallocatable.
+ */
+#define BUFFER_FLAG_REALLOCATABLE (1 << 0)
+/**
+ * The AVBuffer structure is part of a larger structure
+ * and should not be freed.
+ */
+#define BUFFER_FLAG_NO_FREE       (1 << 1)
+
+struct AVBuffer {
+    uint8_t *data; /**< data described by this buffer */
+    size_t size; /**< size of data in bytes */
+
+    /**
+     *  number of existing AVBufferRef instances referring to this buffer
+     */
+    atomic_uint refcount;
+
+    /**
+     * a callback for freeing the data
+     */
+    void (*free)(void *opaque, uint8_t *data);
+
+    /**
+     * an opaque pointer, to be used by the freeing callback
+     */
+    void *opaque;
+
+    /**
+     * A combination of AV_BUFFER_FLAG_*
+     */
+    int flags;
+
+    /**
+     * A combination of BUFFER_FLAG_*
+     */
+    int flags_internal;
+};
+
+typedef struct BufferPoolEntry {
+    uint8_t *data;
+
+    /*
+     * Backups of the original opaque/free of the AVBuffer corresponding to
+     * data. They will be used to free the buffer when the pool is freed.
+     */
+    void *opaque;
+    void (*free)(void *opaque, uint8_t *data);
+
+    AVBufferPool *pool;
+    struct BufferPoolEntry *next;
+
+    /*
+     * An AVBuffer structure to (re)use as AVBuffer for subsequent uses
+     * of this BufferPoolEntry.
+     */
+    AVBuffer buffer;
+} BufferPoolEntry;
+
+struct AVBufferPool {
+    AVMutex mutex;
+    BufferPoolEntry *pool;
+
+    /*
+     * This is used to track when the pool is to be freed.
+     * The pointer to the pool itself held by the caller is considered to
+     * be one reference. Each buffer requested by the caller increases refcount
+     * by one, returning the buffer to the pool decreases it by one.
+     * refcount reaches zero when the buffer has been uninited AND all the
+     * buffers have been released, then it's safe to free the pool and all
+     * the buffers in it.
+     */
+    atomic_uint refcount;
+
+    size_t size;
+    void *opaque;
+    AVBufferRef* (*alloc)(size_t size);
+    AVBufferRef* (*alloc2)(void *opaque, size_t size);
+    void         (*pool_free)(void *opaque);
+};
+
+#endif /* AVUTIL_BUFFER_INTERNAL_H */

ffmpeg/libavutil/camellia.c

@@ -0,0 +1,416 @@
+/*
+ * An implementation of the CAMELLIA algorithm as mentioned in RFC3713
+ * Copyright (c) 2014 Supraja Meedinti
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+
+#include "camellia.h"
+#include "error.h"
+#include "intreadwrite.h"
+#include "mem.h"
+#include "attributes.h"
+
+#define LR32(x,c) ((x) << (c) | (x) >> (32 - (c)))
+#define RR32(x,c) ((x) >> (c) | (x) << (32 - (c)))
+
+#define MASK8 0xff
+#define MASK32 0xffffffff
+#define MASK64 0xffffffffffffffff
+
+#define Sigma1  0xA09E667F3BCC908B
+#define Sigma2  0xB67AE8584CAA73B2
+#define Sigma3  0xC6EF372FE94F82BE
+#define Sigma4  0x54FF53A5F1D36F1C
+#define Sigma5  0x10E527FADE682D1D
+#define Sigma6  0xB05688C2B3E6C1FD
+
+static uint64_t SP[8][256];
+
+typedef struct AVCAMELLIA {
+    uint64_t Kw[4];
+    uint64_t Ke[6];
+    uint64_t K[24];
+    int key_bits;
+} AVCAMELLIA;
+
+static const uint8_t SBOX1[256] = {
+112, 130,  44, 236, 179,  39, 192, 229, 228, 133,  87,  53, 234,  12, 174,  65,
+ 35, 239, 107, 147,  69,  25, 165,  33, 237,  14,  79,  78,  29, 101, 146, 189,
+134, 184, 175, 143, 124, 235,  31, 206,  62,  48, 220,  95,  94, 197,  11,  26,
+166, 225,  57, 202, 213,  71,  93,  61, 217,   1,  90, 214,  81,  86, 108,  77,
+139,  13, 154, 102, 251, 204, 176,  45, 116,  18,  43,  32, 240, 177, 132, 153,
+223,  76, 203, 194,  52, 126, 118,   5, 109, 183, 169,  49, 209,  23,   4, 215,
+ 20,  88,  58,  97, 222,  27,  17,  28,  50,  15, 156,  22,  83,  24, 242,  34,
+254,  68, 207, 178, 195, 181, 122, 145,  36,   8, 232, 168,  96, 252, 105,  80,
+170, 208, 160, 125, 161, 137,  98, 151,  84,  91,  30, 149, 224, 255, 100, 210,
+ 16, 196,   0,  72, 163, 247, 117, 219, 138,   3, 230, 218,   9,  63, 221, 148,
+135,  92, 131,   2, 205,  74, 144,  51, 115, 103, 246, 243, 157, 127, 191, 226,
+ 82, 155, 216,  38, 200,  55, 198,  59, 129, 150, 111,  75,  19, 190,  99,  46,
+233, 121, 167, 140, 159, 110, 188, 142,  41, 245, 249, 182,  47, 253, 180,  89,
+120, 152,   6, 106, 231,  70, 113, 186, 212,  37, 171,  66, 136, 162, 141, 250,
+114,   7, 185,  85, 248, 238, 172,  10,  54,  73,  42, 104,  60,  56, 241, 164,
+ 64,  40, 211, 123, 187, 201,  67, 193,  21, 227, 173, 244, 119, 199, 128, 158
+};
+
+static const uint8_t SBOX2[256] = {
+224,   5,  88, 217, 103,  78, 129, 203, 201,  11, 174, 106, 213,  24,  93, 130,
+ 70, 223, 214,  39, 138,  50,  75,  66, 219,  28, 158, 156,  58, 202,  37, 123,
+ 13, 113,  95,  31, 248, 215,  62, 157, 124,  96, 185, 190, 188, 139,  22,  52,
+ 77, 195, 114, 149, 171, 142, 186, 122, 179,   2, 180, 173, 162, 172, 216, 154,
+ 23,  26,  53, 204, 247, 153,  97,  90, 232,  36,  86,  64, 225,  99,   9,  51,
+191, 152, 151, 133, 104, 252, 236,  10, 218, 111,  83,  98, 163,  46,   8, 175,
+ 40, 176, 116, 194, 189,  54,  34,  56, 100,  30,  57,  44, 166,  48, 229,  68,
+253, 136, 159, 101, 135, 107, 244,  35,  72,  16, 209,  81, 192, 249, 210, 160,
+ 85, 161,  65, 250,  67,  19, 196,  47, 168, 182,  60,  43, 193, 255, 200, 165,
+ 32, 137,   0, 144,  71, 239, 234, 183,  21,   6, 205, 181,  18, 126, 187,  41,
+ 15, 184,   7,   4, 155, 148,  33, 102, 230, 206, 237, 231,  59, 254, 127, 197,
+164,  55, 177,  76, 145, 110, 141, 118,   3,  45, 222, 150,  38, 125, 198,  92,
+211, 242,  79,  25,  63, 220, 121,  29,  82, 235, 243, 109,  94, 251, 105, 178,
+240,  49,  12, 212, 207, 140, 226, 117, 169,  74,  87, 132,  17,  69,  27, 245,
+228,  14, 115, 170, 241, 221,  89,  20, 108, 146,  84, 208, 120, 112, 227,  73,
+128,  80, 167, 246, 119, 147, 134, 131,  42, 199,  91, 233, 238, 143,   1,  61
+};
+
+static const uint8_t SBOX3[256] = {
+ 56,  65,  22, 118, 217, 147,  96, 242, 114, 194, 171, 154, 117,   6,  87, 160,
+145, 247, 181, 201, 162, 140, 210, 144, 246,   7, 167,  39, 142, 178,  73, 222,
+ 67,  92, 215, 199,  62, 245, 143, 103,  31,  24, 110, 175,  47, 226, 133,  13,
+ 83, 240, 156, 101, 234, 163, 174, 158, 236, 128,  45, 107, 168,  43,  54, 166,
+197, 134,  77,  51, 253, 102,  88, 150,  58,   9, 149,  16, 120, 216,  66, 204,
+239,  38, 229,  97,  26,  63,  59, 130, 182, 219, 212, 152, 232, 139,   2, 235,
+ 10,  44,  29, 176, 111, 141, 136,  14,  25, 135,  78,  11, 169,  12, 121,  17,
+127,  34, 231,  89, 225, 218,  61, 200,  18,   4, 116,  84,  48, 126, 180,  40,
+ 85, 104,  80, 190, 208, 196,  49, 203,  42, 173,  15, 202, 112, 255,  50, 105,
+  8,  98,   0,  36, 209, 251, 186, 237,  69, 129, 115, 109, 132, 159, 238,  74,
+195,  46, 193,   1, 230,  37,  72, 153, 185, 179, 123, 249, 206, 191, 223, 113,
+ 41, 205, 108,  19, 100, 155,  99, 157, 192,  75, 183, 165, 137,  95, 177,  23,
+244, 188, 211,  70, 207,  55,  94,  71, 148, 250, 252,  91, 151, 254,  90, 172,
+ 60,  76,   3,  53, 243,  35, 184,  93, 106, 146, 213,  33,  68,  81, 198, 125,
+ 57, 131, 220, 170, 124, 119,  86,   5,  27, 164,  21,  52,  30,  28, 248,  82,
+ 32,  20, 233, 189, 221, 228, 161, 224, 138, 241, 214, 122, 187, 227,  64,  79
+};
+
+static const uint8_t SBOX4[256] = {
+112,  44, 179, 192, 228,  87, 234, 174,  35, 107,  69, 165, 237,  79,  29, 146,
+134, 175, 124,  31,  62, 220,  94,  11, 166,  57, 213,  93, 217,  90,  81, 108,
+139, 154, 251, 176, 116,  43, 240, 132, 223, 203,  52, 118, 109, 169, 209,   4,
+ 20,  58, 222,  17,  50, 156,  83, 242, 254, 207, 195, 122,  36, 232,  96, 105,
+170, 160, 161,  98,  84,  30, 224, 100,  16,   0, 163, 117, 138, 230,   9, 221,
+135, 131, 205, 144, 115, 246, 157, 191,  82, 216, 200, 198, 129, 111,  19,  99,
+233, 167, 159, 188,  41, 249,  47, 180, 120,   6, 231, 113, 212, 171, 136, 141,
+114, 185, 248, 172,  54,  42,  60, 241,  64, 211, 187,  67,  21, 173, 119, 128,
+130, 236,  39, 229, 133,  53,  12,  65, 239, 147,  25,  33,  14,  78, 101, 189,
+184, 143, 235, 206,  48,  95, 197,  26, 225, 202,  71,  61,   1, 214,  86,  77,
+ 13, 102, 204,  45,  18,  32, 177, 153,  76, 194, 126,   5, 183,  49,  23, 215,
+ 88,  97,  27,  28,  15,  22,  24,  34,  68, 178, 181, 145,   8, 168, 252,  80,
+208, 125, 137, 151,  91, 149, 255, 210, 196,  72, 247, 219,   3, 218,  63, 148,
+ 92,   2,  74,  51, 103, 243, 127, 226, 155,  38,  55,  59, 150,  75, 190,  46,
+121, 140, 110, 142, 245, 182, 253,  89, 152, 106,  70, 186,  37,  66, 162, 250,
+  7,  85, 238,  10,  73, 104,  56, 164,  40, 123, 201, 193, 227, 244, 199, 158
+};
+
+const int av_camellia_size = sizeof(AVCAMELLIA);
+
+static void LR128(uint64_t d[2], const uint64_t K[2], int x)
+{
+    int i = 0;
+    if (64 <= x && x < 128) {
+        i = 1;
+        x -= 64;
+    }
+    if (x <= 0 || x >= 128) {
+        d[0] = K[i];
+        d[1] = K[!i];
+        return;
+    }
+    d[0] = (K[i] << x | K[!i] >> (64 - x));
+    d[1] = (K[!i] << x | K[i] >> (64 - x));
+}
+
+static uint64_t F(uint64_t F_IN, uint64_t KE)
+{
+    KE ^= F_IN;
+    F_IN=SP[0][KE >> 56]^SP[1][(KE >> 48) & MASK8]^SP[2][(KE >> 40) & MASK8]^SP[3][(KE >> 32) & MASK8]^SP[4][(KE >> 24) & MASK8]^SP[5][(KE >> 16) & MASK8]^SP[6][(KE >> 8) & MASK8]^SP[7][KE & MASK8];
+    return F_IN;
+}
+
+static uint64_t FL(uint64_t FL_IN, uint64_t KE)
+{
+    uint32_t x1, x2, k1, k2;
+    x1 = FL_IN >> 32;
+    x2 = FL_IN & MASK32;
+    k1 = KE >> 32;
+    k2 = KE & MASK32;
+    x2 = x2 ^ LR32((x1 & k1), 1);
+    x1 = x1 ^ (x2 | k2);
+    return ((uint64_t)x1 << 32) | (uint64_t)x2;
+}
+
+static uint64_t FLINV(uint64_t FLINV_IN, uint64_t KE)
+{
+    uint32_t x1, x2, k1, k2;
+    x1 = FLINV_IN >> 32;
+    x2 = FLINV_IN & MASK32;
+    k1 = KE >> 32;
+    k2 = KE & MASK32;
+    x1 = x1 ^ (x2 | k2);
+    x2 = x2 ^ LR32((x1 & k1), 1);
+    return ((uint64_t)x1 << 32) | (uint64_t)x2;
+}
+
+static const uint8_t shifts[2][12] = {
+    {0, 15, 15, 45, 45, 60, 94, 94, 111},
+    {0, 15, 15, 30, 45, 45, 60, 60,  77, 94, 94, 111}
+};
+
+static const uint8_t vars[2][12] = {
+    {2, 0, 2, 0, 2, 2, 0, 2, 0},
+    {3, 1, 2, 3, 0, 2, 1, 3, 0, 1, 2, 0}
+};
+
+static void generate_round_keys(AVCAMELLIA *cs, uint64_t Kl[2], uint64_t Kr[2], uint64_t Ka[2], uint64_t Kb[2])
+{
+    int i;
+    uint64_t *Kd[4], d[2];
+    Kd[0] = Kl;
+    Kd[1] = Kr;
+    Kd[2] = Ka;
+    Kd[3] = Kb;
+    cs->Kw[0] = Kl[0];
+    cs->Kw[1] = Kl[1];
+    if (cs->key_bits == 128) {
+        for (i = 0; i < 9; i++) {
+            LR128(d, Kd[vars[0][i]], shifts[0][i]);
+            cs->K[2*i] = d[0];
+            cs->K[2*i+1] = d[1];
+        }
+        LR128(d, Kd[0], 60);
+        cs->K[9] = d[1];
+        LR128(d, Kd[2], 30);
+        cs->Ke[0] = d[0];
+        cs->Ke[1] = d[1];
+        LR128(d, Kd[0], 77);
+        cs->Ke[2] = d[0];
+        cs->Ke[3] = d[1];
+        LR128(d, Kd[2], 111);
+        cs->Kw[2] = d[0];
+        cs->Kw[3] = d[1];
+    } else {
+        for (i = 0; i < 12; i++) {
+            LR128(d, Kd[vars[1][i]], shifts[1][i]);
+            cs->K[2*i] = d[0];
+            cs->K[2*i+1] = d[1];
+        }
+        LR128(d, Kd[1], 30);
+        cs->Ke[0] = d[0];
+        cs->Ke[1] = d[1];
+        LR128(d, Kd[0], 60);
+        cs->Ke[2] = d[0];
+        cs->Ke[3] = d[1];
+        LR128(d, Kd[2], 77);
+        cs->Ke[4] = d[0];
+        cs->Ke[5] = d[1];
+        LR128(d, Kd[3], 111);
+        cs->Kw[2] = d[0];
+        cs->Kw[3] = d[1];
+    }
+}
+
+static void camellia_encrypt(AVCAMELLIA *cs, uint8_t *dst, const uint8_t *src)
+{
+    uint64_t D1, D2;
+    D1 = AV_RB64(src);
+    D2 = AV_RB64(src + 8);
+    D1 ^= cs->Kw[0];
+    D2 ^= cs->Kw[1];
+    D2 ^= F(D1, cs->K[0]);
+    D1 ^= F(D2, cs->K[1]);
+    D2 ^= F(D1, cs->K[2]);
+    D1 ^= F(D2, cs->K[3]);
+    D2 ^= F(D1, cs->K[4]);
+    D1 ^= F(D2, cs->K[5]);
+    D1 = FL(D1, cs->Ke[0]);
+    D2 = FLINV(D2, cs->Ke[1]);
+    D2 ^= F(D1, cs->K[6]);
+    D1 ^= F(D2, cs->K[7]);
+    D2 ^= F(D1, cs->K[8]);
+    D1 ^= F(D2, cs->K[9]);
+    D2 ^= F(D1, cs->K[10]);
+    D1 ^= F(D2, cs->K[11]);
+    D1 = FL(D1, cs->Ke[2]);
+    D2 = FLINV(D2, cs->Ke[3]);
+    D2 ^= F(D1, cs->K[12]);
+    D1 ^= F(D2, cs->K[13]);
+    D2 ^= F(D1, cs->K[14]);
+    D1 ^= F(D2, cs->K[15]);
+    D2 ^= F(D1, cs->K[16]);
+    D1 ^= F(D2, cs->K[17]);
+    if (cs->key_bits != 128) {
+        D1 = FL(D1, cs->Ke[4]);
+        D2 = FLINV(D2, cs->Ke[5]);
+        D2 ^= F(D1, cs->K[18]);
+        D1 ^= F(D2, cs->K[19]);
+        D2 ^= F(D1, cs->K[20]);
+        D1 ^= F(D2, cs->K[21]);
+        D2 ^= F(D1, cs->K[22]);
+        D1 ^= F(D2, cs->K[23]);
+    }
+    D2 ^= cs->Kw[2];
+    D1 ^= cs->Kw[3];
+    AV_WB64(dst, D2);
+    AV_WB64(dst + 8, D1);
+}
+
+static void camellia_decrypt(AVCAMELLIA *cs, uint8_t *dst, const uint8_t *src, uint8_t *iv)
+{
+    uint64_t D1, D2;
+    D1 = AV_RB64(src);
+    D2 = AV_RB64(src + 8);
+    D1 ^= cs->Kw[2];
+    D2 ^= cs->Kw[3];
+    if (cs->key_bits != 128) {
+        D2 ^= F(D1, cs->K[23]);
+        D1 ^= F(D2, cs->K[22]);
+        D2 ^= F(D1, cs->K[21]);
+        D1 ^= F(D2, cs->K[20]);
+        D2 ^= F(D1, cs->K[19]);
+        D1 ^= F(D2, cs->K[18]);
+        D1 = FL(D1, cs->Ke[5]);
+        D2 = FLINV(D2, cs->Ke[4]);
+    }
+    D2 ^= F(D1, cs->K[17]);
+    D1 ^= F(D2, cs->K[16]);
+    D2 ^= F(D1, cs->K[15]);
+    D1 ^= F(D2, cs->K[14]);
+    D2 ^= F(D1, cs->K[13]);
+    D1 ^= F(D2, cs->K[12]);
+    D1 = FL(D1, cs->Ke[3]);
+    D2 = FLINV(D2, cs->Ke[2]);
+    D2 ^= F(D1, cs->K[11]);
+    D1 ^= F(D2, cs->K[10]);
+    D2 ^= F(D1, cs->K[9]);
+    D1 ^= F(D2, cs->K[8]);
+    D2 ^= F(D1, cs->K[7]);
+    D1 ^= F(D2, cs->K[6]);
+    D1 = FL(D1, cs->Ke[1]);
+    D2 = FLINV(D2, cs->Ke[0]);
+    D2 ^= F(D1, cs->K[5]);
+    D1 ^= F(D2, cs->K[4]);
+    D2 ^= F(D1, cs->K[3]);
+    D1 ^= F(D2, cs->K[2]);
+    D2 ^= F(D1, cs->K[1]);
+    D1 ^= F(D2, cs->K[0]);
+    D2 ^= cs->Kw[0];
+    D1 ^= cs->Kw[1];
+    if (iv) {
+        D2 ^= AV_RB64(iv);
+        D1 ^= AV_RB64(iv + 8);
+        memcpy(iv, src, 16);
+    }
+    AV_WB64(dst, D2);
+    AV_WB64(dst + 8, D1);
+}
+
+static void computeSP(void)
+{
+    uint64_t z;
+    int i;
+    for (i = 0; i < 256; i++) {
+        z = SBOX1[i];
+        SP[0][i] = (z << 56) ^ (z << 48) ^ (z << 40) ^ (z << 24) ^ z;
+        SP[7][i] = (z << 56) ^ (z << 48) ^ (z << 40) ^ (z << 24) ^ (z << 16) ^ (z << 8);
+        z = SBOX2[i];
+        SP[1][i] = (z << 48) ^ (z << 40) ^ (z << 32) ^ (z << 24) ^ (z << 16);
+        SP[4][i] = (z << 48) ^ (z << 40) ^ (z << 32) ^ (z << 16) ^ (z << 8) ^ z;
+        z = SBOX3[i];
+        SP[2][i] = (z << 56) ^ (z << 40) ^ (z << 32) ^ (z << 16) ^ (z << 8);
+        SP[5][i] = (z << 56) ^ (z << 40) ^ (z << 32) ^ (z << 24) ^ (z << 8) ^ z;
+        z = SBOX4[i];
+        SP[3][i] = (z << 56) ^ (z << 48) ^ (z << 32) ^ (z << 8) ^ z;
+        SP[6][i] = (z << 56) ^ (z << 48) ^ (z << 32) ^ (z << 24) ^ (z << 16) ^ z;
+    }
+}
+
+struct AVCAMELLIA *av_camellia_alloc(void)
+{
+    return av_mallocz(sizeof(struct AVCAMELLIA));
+}
+
+av_cold int av_camellia_init(AVCAMELLIA *cs, const uint8_t *key, int key_bits)
+{
+    uint64_t Kl[2], Kr[2], Ka[2], Kb[2];
+    uint64_t D1, D2;
+    if (key_bits != 128 && key_bits != 192 && key_bits != 256)
+        return AVERROR(EINVAL);
+    memset(Kb, 0, sizeof(Kb));
+    memset(Kr, 0, sizeof(Kr));
+    cs->key_bits = key_bits;
+    Kl[0] = AV_RB64(key);
+    Kl[1] = AV_RB64(key + 8);
+    if (key_bits == 192) {
+        Kr[0] = AV_RB64(key + 16);
+        Kr[1] = ~Kr[0];
+    } else if (key_bits == 256) {
+        Kr[0] = AV_RB64(key + 16);
+        Kr[1] = AV_RB64(key + 24);
+    }
+    computeSP();
+    D1 = Kl[0] ^ Kr[0];
+    D2 = Kl[1] ^ Kr[1];
+    D2 ^= F(D1, Sigma1);
+    D1 ^= F(D2, Sigma2);
+    D1 ^= Kl[0];
+    D2 ^= Kl[1];
+    D2 ^= F(D1, Sigma3);
+    D1 ^= F(D2, Sigma4);
+    Ka[0] = D1;
+    Ka[1] = D2;
+    if (key_bits != 128) {
+        D1 = Ka[0] ^ Kr[0];
+        D2 = Ka[1] ^ Kr[1];
+        D2 ^= F(D1, Sigma5);
+        D1 ^= F(D2, Sigma6);
+        Kb[0] = D1;
+        Kb[1] = D2;
+    }
+    generate_round_keys(cs, Kl, Kr, Ka, Kb);
+    return 0;
+}
+
+void av_camellia_crypt(AVCAMELLIA *cs, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
+{
+    int i;
+    while (count--) {
+        if (decrypt) {
+            camellia_decrypt(cs, dst, src, iv);
+        } else {
+            if (iv) {
+                for (i = 0; i < 16; i++)
+                    dst[i] = src[i] ^ iv[i];
+                camellia_encrypt(cs, dst, dst);
+                memcpy(iv, dst, 16);
+            } else {
+                camellia_encrypt(cs, dst, src);
+            }
+        }
+        src = src + 16;
+        dst = dst + 16;
+    }
+}

ffmpeg/libavutil/camellia.h

@@ -0,0 +1,70 @@
+/*
+ * An implementation of the CAMELLIA algorithm as mentioned in RFC3713
+ * Copyright (c) 2014 Supraja Meedinti
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CAMELLIA_H
+#define AVUTIL_CAMELLIA_H
+
+#include <stdint.h>
+
+
+/**
+  * @file
+  * @brief Public header for libavutil CAMELLIA algorithm
+  * @defgroup lavu_camellia CAMELLIA
+  * @ingroup lavu_crypto
+  * @{
+  */
+
+extern const int av_camellia_size;
+
+struct AVCAMELLIA;
+
+/**
+  * Allocate an AVCAMELLIA context
+  * To free the struct: av_free(ptr)
+  */
+struct AVCAMELLIA *av_camellia_alloc(void);
+
+/**
+  * Initialize an AVCAMELLIA context.
+  *
+  * @param ctx an AVCAMELLIA context
+  * @param key a key of 16, 24, 32 bytes used for encryption/decryption
+  * @param key_bits number of keybits: possible are 128, 192, 256
+ */
+int av_camellia_init(struct AVCAMELLIA *ctx, const uint8_t *key, int key_bits);
+
+/**
+  * Encrypt or decrypt a buffer using a previously initialized context
+  *
+  * @param ctx an AVCAMELLIA context
+  * @param dst destination array, can be equal to src
+  * @param src source array, can be equal to dst
+  * @param count number of 16 byte blocks
+  * @param iv initialization vector for CBC mode, NULL for ECB mode
+  * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_camellia_crypt(struct AVCAMELLIA *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t* iv, int decrypt);
+
+/**
+ * @}
+ */
+#endif /* AVUTIL_CAMELLIA_H */

ffmpeg/libavutil/cast5.c

@@ -0,0 +1,511 @@
+/*
+ * An implementation of the CAST128 algorithm as mentioned in RFC2144
+ * Copyright (c) 2014 Supraja Meedinti
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+
+#include "cast5.h"
+#include "error.h"
+#include "intreadwrite.h"
+#include "mem.h"
+#include "attributes.h"
+
+#define IA(x) ((x) >> 24)
+#define IB(x) (((x) >> 16) & 0xff)
+#define IC(x) (((x) >> 8) & 0xff)
+#define ID(x) ((x) & 0xff)
+
+#define LR(x, c) (((x) << (c)) | ((x) >> ((32 - (c)) & 31)))
+
+#define F3(l, r, i)                                                                                  \
+    do {                                                                                             \
+        I = LR(cs->Km[i] - r, cs->Kr[i]);                                                            \
+        f = ((S1[IA(I)] + S2[IB(I)]) ^ S3[IC(I)]) - S4[ID(I)];                                       \
+        l = f ^ l;                                                                                   \
+    } while (0)
+
+#define F2(l, r, i)                                                                                  \
+    do {                                                                                             \
+        I = LR(cs->Km[i] ^ r, cs->Kr[i]);                                                            \
+        f = ((S1[IA(I)] - S2[IB(I)]) + S3[IC(I)]) ^ S4[ID(I)];                                       \
+        l = f ^ l;                                                                                   \
+    } while (0)
+
+#define F1(l, r, i)                                                                                  \
+    do {                                                                                             \
+        I = LR(cs->Km[i] + r, cs->Kr[i]);                                                            \
+        f = ((S1[IA(I)] ^ S2[IB(I)]) - S3[IC(I)]) + S4[ID(I)];                                       \
+        l = f ^ l;                                                                                   \
+    } while (0)
+
+#define COMPUTE_Z                                                                                    \
+    do {                                                                                             \
+        z[0] = x[0] ^ S5[IB(x[3])] ^ S6[ID(x[3])] ^ S7[IA(x[3])] ^ S8[IC(x[3])] ^ S7[IA(x[2])];      \
+        z[1] = x[2] ^ S5[IA(z[0])] ^ S6[IC(z[0])] ^ S7[IB(z[0])] ^ S8[ID(z[0])] ^ S8[IC(x[2])];      \
+        z[2] = x[3] ^ S5[ID(z[1])] ^ S6[IC(z[1])] ^ S7[IB(z[1])] ^ S8[IA(z[1])] ^ S5[IB(x[2])];      \
+        z[3] = x[1] ^ S5[IC(z[2])] ^ S6[IB(z[2])] ^ S7[ID(z[2])] ^ S8[IA(z[2])] ^ S6[ID(x[2])];      \
+    } while (0)
+
+#define COMPUTE_X                                                                                    \
+    do {                                                                                             \
+        x[0] = z[2] ^ S5[IB(z[1])] ^ S6[ID(z[1])] ^ S7[IA(z[1])] ^ S8[IC(z[1])] ^ S7[IA(z[0])];      \
+        x[1] = z[0] ^ S5[IA(x[0])] ^ S6[IC(x[0])] ^ S7[IB(x[0])] ^ S8[ID(x[0])] ^ S8[IC(z[0])];      \
+        x[2] = z[1] ^ S5[ID(x[1])] ^ S6[IC(x[1])] ^ S7[IB(x[1])] ^ S8[IA(x[1])] ^ S5[IB(z[0])];      \
+        x[3] = z[3] ^ S5[IC(x[2])] ^ S6[IB(x[2])] ^ S7[ID(x[2])] ^ S8[IA(x[2])] ^ S6[ID(z[0])];      \
+    } while (0)
+
+
+typedef struct AVCAST5 {
+    uint32_t Km[17];
+    uint32_t Kr[17];
+    int rounds;
+} AVCAST5;
+
+const int av_cast5_size = sizeof(AVCAST5);
+
+static const uint32_t S1[256] = {
+    0x30fb40d4, 0x9fa0ff0b, 0x6beccd2f, 0x3f258c7a, 0x1e213f2f, 0x9c004dd3, 0x6003e540, 0xcf9fc949,
+    0xbfd4af27, 0x88bbbdb5, 0xe2034090, 0x98d09675, 0x6e63a0e0, 0x15c361d2, 0xc2e7661d, 0x22d4ff8e,
+    0x28683b6f, 0xc07fd059, 0xff2379c8, 0x775f50e2, 0x43c340d3, 0xdf2f8656, 0x887ca41a, 0xa2d2bd2d,
+    0xa1c9e0d6, 0x346c4819, 0x61b76d87, 0x22540f2f, 0x2abe32e1, 0xaa54166b, 0x22568e3a, 0xa2d341d0,
+    0x66db40c8, 0xa784392f, 0x004dff2f, 0x2db9d2de, 0x97943fac, 0x4a97c1d8, 0x527644b7, 0xb5f437a7,
+    0xb82cbaef, 0xd751d159, 0x6ff7f0ed, 0x5a097a1f, 0x827b68d0, 0x90ecf52e, 0x22b0c054, 0xbc8e5935,
+    0x4b6d2f7f, 0x50bb64a2, 0xd2664910, 0xbee5812d, 0xb7332290, 0xe93b159f, 0xb48ee411, 0x4bff345d,
+    0xfd45c240, 0xad31973f, 0xc4f6d02e, 0x55fc8165, 0xd5b1caad, 0xa1ac2dae, 0xa2d4b76d, 0xc19b0c50,
+    0x882240f2, 0x0c6e4f38, 0xa4e4bfd7, 0x4f5ba272, 0x564c1d2f, 0xc59c5319, 0xb949e354, 0xb04669fe,
+    0xb1b6ab8a, 0xc71358dd, 0x6385c545, 0x110f935d, 0x57538ad5, 0x6a390493, 0xe63d37e0, 0x2a54f6b3,
+    0x3a787d5f, 0x6276a0b5, 0x19a6fcdf, 0x7a42206a, 0x29f9d4d5, 0xf61b1891, 0xbb72275e, 0xaa508167,
+    0x38901091, 0xc6b505eb, 0x84c7cb8c, 0x2ad75a0f, 0x874a1427, 0xa2d1936b, 0x2ad286af, 0xaa56d291,
+    0xd7894360, 0x425c750d, 0x93b39e26, 0x187184c9, 0x6c00b32d, 0x73e2bb14, 0xa0bebc3c, 0x54623779,
+    0x64459eab, 0x3f328b82, 0x7718cf82, 0x59a2cea6, 0x04ee002e, 0x89fe78e6, 0x3fab0950, 0x325ff6c2,
+    0x81383f05, 0x6963c5c8, 0x76cb5ad6, 0xd49974c9, 0xca180dcf, 0x380782d5, 0xc7fa5cf6, 0x8ac31511,
+    0x35e79e13, 0x47da91d0, 0xf40f9086, 0xa7e2419e, 0x31366241, 0x051ef495, 0xaa573b04, 0x4a805d8d,
+    0x548300d0, 0x00322a3c, 0xbf64cddf, 0xba57a68e, 0x75c6372b, 0x50afd341, 0xa7c13275, 0x915a0bf5,
+    0x6b54bfab, 0x2b0b1426, 0xab4cc9d7, 0x449ccd82, 0xf7fbf265, 0xab85c5f3, 0x1b55db94, 0xaad4e324,
+    0xcfa4bd3f, 0x2deaa3e2, 0x9e204d02, 0xc8bd25ac, 0xeadf55b3, 0xd5bd9e98, 0xe31231b2, 0x2ad5ad6c,
+    0x954329de, 0xadbe4528, 0xd8710f69, 0xaa51c90f, 0xaa786bf6, 0x22513f1e, 0xaa51a79b, 0x2ad344cc,
+    0x7b5a41f0, 0xd37cfbad, 0x1b069505, 0x41ece491, 0xb4c332e6, 0x032268d4, 0xc9600acc, 0xce387e6d,
+    0xbf6bb16c, 0x6a70fb78, 0x0d03d9c9, 0xd4df39de, 0xe01063da, 0x4736f464, 0x5ad328d8, 0xb347cc96,
+    0x75bb0fc3, 0x98511bfb, 0x4ffbcc35, 0xb58bcf6a, 0xe11f0abc, 0xbfc5fe4a, 0xa70aec10, 0xac39570a,
+    0x3f04442f, 0x6188b153, 0xe0397a2e, 0x5727cb79, 0x9ceb418f, 0x1cacd68d, 0x2ad37c96, 0x0175cb9d,
+    0xc69dff09, 0xc75b65f0, 0xd9db40d8, 0xec0e7779, 0x4744ead4, 0xb11c3274, 0xdd24cb9e, 0x7e1c54bd,
+    0xf01144f9, 0xd2240eb1, 0x9675b3fd, 0xa3ac3755, 0xd47c27af, 0x51c85f4d, 0x56907596, 0xa5bb15e6,
+    0x580304f0, 0xca042cf1, 0x011a37ea, 0x8dbfaadb, 0x35ba3e4a, 0x3526ffa0, 0xc37b4d09, 0xbc306ed9,
+    0x98a52666, 0x5648f725, 0xff5e569d, 0x0ced63d0, 0x7c63b2cf, 0x700b45e1, 0xd5ea50f1, 0x85a92872,
+    0xaf1fbda7, 0xd4234870, 0xa7870bf3, 0x2d3b4d79, 0x42e04198, 0x0cd0ede7, 0x26470db8, 0xf881814c,
+    0x474d6ad7, 0x7c0c5e5c, 0xd1231959, 0x381b7298, 0xf5d2f4db, 0xab838653, 0x6e2f1e23, 0x83719c9e,
+    0xbd91e046, 0x9a56456e, 0xdc39200c, 0x20c8c571, 0x962bda1c, 0xe1e696ff, 0xb141ab08, 0x7cca89b9,
+    0x1a69e783, 0x02cc4843, 0xa2f7c579, 0x429ef47d, 0x427b169c, 0x5ac9f049, 0xdd8f0f00, 0x5c8165bf
+};
+
+static const uint32_t S2[256] = {
+    0x1f201094, 0xef0ba75b, 0x69e3cf7e, 0x393f4380, 0xfe61cf7a, 0xeec5207a, 0x55889c94, 0x72fc0651,
+    0xada7ef79, 0x4e1d7235, 0xd55a63ce, 0xde0436ba, 0x99c430ef, 0x5f0c0794, 0x18dcdb7d, 0xa1d6eff3,
+    0xa0b52f7b, 0x59e83605, 0xee15b094, 0xe9ffd909, 0xdc440086, 0xef944459, 0xba83ccb3, 0xe0c3cdfb,
+    0xd1da4181, 0x3b092ab1, 0xf997f1c1, 0xa5e6cf7b, 0x01420ddb, 0xe4e7ef5b, 0x25a1ff41, 0xe180f806,
+    0x1fc41080, 0x179bee7a, 0xd37ac6a9, 0xfe5830a4, 0x98de8b7f, 0x77e83f4e, 0x79929269, 0x24fa9f7b,
+    0xe113c85b, 0xacc40083, 0xd7503525, 0xf7ea615f, 0x62143154, 0x0d554b63, 0x5d681121, 0xc866c359,
+    0x3d63cf73, 0xcee234c0, 0xd4d87e87, 0x5c672b21, 0x071f6181, 0x39f7627f, 0x361e3084, 0xe4eb573b,
+    0x602f64a4, 0xd63acd9c, 0x1bbc4635, 0x9e81032d, 0x2701f50c, 0x99847ab4, 0xa0e3df79, 0xba6cf38c,
+    0x10843094, 0x2537a95e, 0xf46f6ffe, 0xa1ff3b1f, 0x208cfb6a, 0x8f458c74, 0xd9e0a227, 0x4ec73a34,
+    0xfc884f69, 0x3e4de8df, 0xef0e0088, 0x3559648d, 0x8a45388c, 0x1d804366, 0x721d9bfd, 0xa58684bb,
+    0xe8256333, 0x844e8212, 0x128d8098, 0xfed33fb4, 0xce280ae1, 0x27e19ba5, 0xd5a6c252, 0xe49754bd,
+    0xc5d655dd, 0xeb667064, 0x77840b4d, 0xa1b6a801, 0x84db26a9, 0xe0b56714, 0x21f043b7, 0xe5d05860,
+    0x54f03084, 0x066ff472, 0xa31aa153, 0xdadc4755, 0xb5625dbf, 0x68561be6, 0x83ca6b94, 0x2d6ed23b,
+    0xeccf01db, 0xa6d3d0ba, 0xb6803d5c, 0xaf77a709, 0x33b4a34c, 0x397bc8d6, 0x5ee22b95, 0x5f0e5304,
+    0x81ed6f61, 0x20e74364, 0xb45e1378, 0xde18639b, 0x881ca122, 0xb96726d1, 0x8049a7e8, 0x22b7da7b,
+    0x5e552d25, 0x5272d237, 0x79d2951c, 0xc60d894c, 0x488cb402, 0x1ba4fe5b, 0xa4b09f6b, 0x1ca815cf,
+    0xa20c3005, 0x8871df63, 0xb9de2fcb, 0x0cc6c9e9, 0x0beeff53, 0xe3214517, 0xb4542835, 0x9f63293c,
+    0xee41e729, 0x6e1d2d7c, 0x50045286, 0x1e6685f3, 0xf33401c6, 0x30a22c95, 0x31a70850, 0x60930f13,
+    0x73f98417, 0xa1269859, 0xec645c44, 0x52c877a9, 0xcdff33a6, 0xa02b1741, 0x7cbad9a2, 0x2180036f,
+    0x50d99c08, 0xcb3f4861, 0xc26bd765, 0x64a3f6ab, 0x80342676, 0x25a75e7b, 0xe4e6d1fc, 0x20c710e6,
+    0xcdf0b680, 0x17844d3b, 0x31eef84d, 0x7e0824e4, 0x2ccb49eb, 0x846a3bae, 0x8ff77888, 0xee5d60f6,
+    0x7af75673, 0x2fdd5cdb, 0xa11631c1, 0x30f66f43, 0xb3faec54, 0x157fd7fa, 0xef8579cc, 0xd152de58,
+    0xdb2ffd5e, 0x8f32ce19, 0x306af97a, 0x02f03ef8, 0x99319ad5, 0xc242fa0f, 0xa7e3ebb0, 0xc68e4906,
+    0xb8da230c, 0x80823028, 0xdcdef3c8, 0xd35fb171, 0x088a1bc8, 0xbec0c560, 0x61a3c9e8, 0xbca8f54d,
+    0xc72feffa, 0x22822e99, 0x82c570b4, 0xd8d94e89, 0x8b1c34bc, 0x301e16e6, 0x273be979, 0xb0ffeaa6,
+    0x61d9b8c6, 0x00b24869, 0xb7ffce3f, 0x08dc283b, 0x43daf65a, 0xf7e19798, 0x7619b72f, 0x8f1c9ba4,
+    0xdc8637a0, 0x16a7d3b1, 0x9fc393b7, 0xa7136eeb, 0xc6bcc63e, 0x1a513742, 0xef6828bc, 0x520365d6,
+    0x2d6a77ab, 0x3527ed4b, 0x821fd216, 0x095c6e2e, 0xdb92f2fb, 0x5eea29cb, 0x145892f5, 0x91584f7f,
+    0x5483697b, 0x2667a8cc, 0x85196048, 0x8c4bacea, 0x833860d4, 0x0d23e0f9, 0x6c387e8a, 0x0ae6d249,
+    0xb284600c, 0xd835731d, 0xdcb1c647, 0xac4c56ea, 0x3ebd81b3, 0x230eabb0, 0x6438bc87, 0xf0b5b1fa,
+    0x8f5ea2b3, 0xfc184642, 0x0a036b7a, 0x4fb089bd, 0x649da589, 0xa345415e, 0x5c038323, 0x3e5d3bb9,
+    0x43d79572, 0x7e6dd07c, 0x06dfdf1e, 0x6c6cc4ef, 0x7160a539, 0x73bfbe70, 0x83877605, 0x4523ecf1
+};
+
+static const uint32_t S3[256] = {
+    0x8defc240, 0x25fa5d9f, 0xeb903dbf, 0xe810c907, 0x47607fff, 0x369fe44b, 0x8c1fc644, 0xaececa90,
+    0xbeb1f9bf, 0xeefbcaea, 0xe8cf1950, 0x51df07ae, 0x920e8806, 0xf0ad0548, 0xe13c8d83, 0x927010d5,
+    0x11107d9f, 0x07647db9, 0xb2e3e4d4, 0x3d4f285e, 0xb9afa820, 0xfade82e0, 0xa067268b, 0x8272792e,
+    0x553fb2c0, 0x489ae22b, 0xd4ef9794, 0x125e3fbc, 0x21fffcee, 0x825b1bfd, 0x9255c5ed, 0x1257a240,
+    0x4e1a8302, 0xbae07fff, 0x528246e7, 0x8e57140e, 0x3373f7bf, 0x8c9f8188, 0xa6fc4ee8, 0xc982b5a5,
+    0xa8c01db7, 0x579fc264, 0x67094f31, 0xf2bd3f5f, 0x40fff7c1, 0x1fb78dfc, 0x8e6bd2c1, 0x437be59b,
+    0x99b03dbf, 0xb5dbc64b, 0x638dc0e6, 0x55819d99, 0xa197c81c, 0x4a012d6e, 0xc5884a28, 0xccc36f71,
+    0xb843c213, 0x6c0743f1, 0x8309893c, 0x0feddd5f, 0x2f7fe850, 0xd7c07f7e, 0x02507fbf, 0x5afb9a04,
+    0xa747d2d0, 0x1651192e, 0xaf70bf3e, 0x58c31380, 0x5f98302e, 0x727cc3c4, 0x0a0fb402, 0x0f7fef82,
+    0x8c96fdad, 0x5d2c2aae, 0x8ee99a49, 0x50da88b8, 0x8427f4a0, 0x1eac5790, 0x796fb449, 0x8252dc15,
+    0xefbd7d9b, 0xa672597d, 0xada840d8, 0x45f54504, 0xfa5d7403, 0xe83ec305, 0x4f91751a, 0x925669c2,
+    0x23efe941, 0xa903f12e, 0x60270df2, 0x0276e4b6, 0x94fd6574, 0x927985b2, 0x8276dbcb, 0x02778176,
+    0xf8af918d, 0x4e48f79e, 0x8f616ddf, 0xe29d840e, 0x842f7d83, 0x340ce5c8, 0x96bbb682, 0x93b4b148,
+    0xef303cab, 0x984faf28, 0x779faf9b, 0x92dc560d, 0x224d1e20, 0x8437aa88, 0x7d29dc96, 0x2756d3dc,
+    0x8b907cee, 0xb51fd240, 0xe7c07ce3, 0xe566b4a1, 0xc3e9615e, 0x3cf8209d, 0x6094d1e3, 0xcd9ca341,
+    0x5c76460e, 0x00ea983b, 0xd4d67881, 0xfd47572c, 0xf76cedd9, 0xbda8229c, 0x127dadaa, 0x438a074e,
+    0x1f97c090, 0x081bdb8a, 0x93a07ebe, 0xb938ca15, 0x97b03cff, 0x3dc2c0f8, 0x8d1ab2ec, 0x64380e51,
+    0x68cc7bfb, 0xd90f2788, 0x12490181, 0x5de5ffd4, 0xdd7ef86a, 0x76a2e214, 0xb9a40368, 0x925d958f,
+    0x4b39fffa, 0xba39aee9, 0xa4ffd30b, 0xfaf7933b, 0x6d498623, 0x193cbcfa, 0x27627545, 0x825cf47a,
+    0x61bd8ba0, 0xd11e42d1, 0xcead04f4, 0x127ea392, 0x10428db7, 0x8272a972, 0x9270c4a8, 0x127de50b,
+    0x285ba1c8, 0x3c62f44f, 0x35c0eaa5, 0xe805d231, 0x428929fb, 0xb4fcdf82, 0x4fb66a53, 0x0e7dc15b,
+    0x1f081fab, 0x108618ae, 0xfcfd086d, 0xf9ff2889, 0x694bcc11, 0x236a5cae, 0x12deca4d, 0x2c3f8cc5,
+    0xd2d02dfe, 0xf8ef5896, 0xe4cf52da, 0x95155b67, 0x494a488c, 0xb9b6a80c, 0x5c8f82bc, 0x89d36b45,
+    0x3a609437, 0xec00c9a9, 0x44715253, 0x0a874b49, 0xd773bc40, 0x7c34671c, 0x02717ef6, 0x4feb5536,
+    0xa2d02fff, 0xd2bf60c4, 0xd43f03c0, 0x50b4ef6d, 0x07478cd1, 0x006e1888, 0xa2e53f55, 0xb9e6d4bc,
+    0xa2048016, 0x97573833, 0xd7207d67, 0xde0f8f3d, 0x72f87b33, 0xabcc4f33, 0x7688c55d, 0x7b00a6b0,
+    0x947b0001, 0x570075d2, 0xf9bb88f8, 0x8942019e, 0x4264a5ff, 0x856302e0, 0x72dbd92b, 0xee971b69,
+    0x6ea22fde, 0x5f08ae2b, 0xaf7a616d, 0xe5c98767, 0xcf1febd2, 0x61efc8c2, 0xf1ac2571, 0xcc8239c2,
+    0x67214cb8, 0xb1e583d1, 0xb7dc3e62, 0x7f10bdce, 0xf90a5c38, 0x0ff0443d, 0x606e6dc6, 0x60543a49,
+    0x5727c148, 0x2be98a1d, 0x8ab41738, 0x20e1be24, 0xaf96da0f, 0x68458425, 0x99833be5, 0x600d457d,
+    0x282f9350, 0x8334b362, 0xd91d1120, 0x2b6d8da0, 0x642b1e31, 0x9c305a00, 0x52bce688, 0x1b03588a,
+    0xf7baefd5, 0x4142ed9c, 0xa4315c11, 0x83323ec5, 0xdfef4636, 0xa133c501, 0xe9d3531c, 0xee353783
+};
+
+static const uint32_t S4[256] = {
+    0x9db30420, 0x1fb6e9de, 0xa7be7bef, 0xd273a298, 0x4a4f7bdb, 0x64ad8c57, 0x85510443, 0xfa020ed1,
+    0x7e287aff, 0xe60fb663, 0x095f35a1, 0x79ebf120, 0xfd059d43, 0x6497b7b1, 0xf3641f63, 0x241e4adf,
+    0x28147f5f, 0x4fa2b8cd, 0xc9430040, 0x0cc32220, 0xfdd30b30, 0xc0a5374f, 0x1d2d00d9, 0x24147b15,
+    0xee4d111a, 0x0fca5167, 0x71ff904c, 0x2d195ffe, 0x1a05645f, 0x0c13fefe, 0x081b08ca, 0x05170121,
+    0x80530100, 0xe83e5efe, 0xac9af4f8, 0x7fe72701, 0xd2b8ee5f, 0x06df4261, 0xbb9e9b8a, 0x7293ea25,
+    0xce84ffdf, 0xf5718801, 0x3dd64b04, 0xa26f263b, 0x7ed48400, 0x547eebe6, 0x446d4ca0, 0x6cf3d6f5,
+    0x2649abdf, 0xaea0c7f5, 0x36338cc1, 0x503f7e93, 0xd3772061, 0x11b638e1, 0x72500e03, 0xf80eb2bb,
+    0xabe0502e, 0xec8d77de, 0x57971e81, 0xe14f6746, 0xc9335400, 0x6920318f, 0x081dbb99, 0xffc304a5,
+    0x4d351805, 0x7f3d5ce3, 0xa6c866c6, 0x5d5bcca9, 0xdaec6fea, 0x9f926f91, 0x9f46222f, 0x3991467d,
+    0xa5bf6d8e, 0x1143c44f, 0x43958302, 0xd0214eeb, 0x022083b8, 0x3fb6180c, 0x18f8931e, 0x281658e6,
+    0x26486e3e, 0x8bd78a70, 0x7477e4c1, 0xb506e07c, 0xf32d0a25, 0x79098b02, 0xe4eabb81, 0x28123b23,
+    0x69dead38, 0x1574ca16, 0xdf871b62, 0x211c40b7, 0xa51a9ef9, 0x0014377b, 0x041e8ac8, 0x09114003,
+    0xbd59e4d2, 0xe3d156d5, 0x4fe876d5, 0x2f91a340, 0x557be8de, 0x00eae4a7, 0x0ce5c2ec, 0x4db4bba6,
+    0xe756bdff, 0xdd3369ac, 0xec17b035, 0x06572327, 0x99afc8b0, 0x56c8c391, 0x6b65811c, 0x5e146119,
+    0x6e85cb75, 0xbe07c002, 0xc2325577, 0x893ff4ec, 0x5bbfc92d, 0xd0ec3b25, 0xb7801ab7, 0x8d6d3b24,
+    0x20c763ef, 0xc366a5fc, 0x9c382880, 0x0ace3205, 0xaac9548a, 0xeca1d7c7, 0x041afa32, 0x1d16625a,
+    0x6701902c, 0x9b757a54, 0x31d477f7, 0x9126b031, 0x36cc6fdb, 0xc70b8b46, 0xd9e66a48, 0x56e55a79,
+    0x026a4ceb, 0x52437eff, 0x2f8f76b4, 0x0df980a5, 0x8674cde3, 0xedda04eb, 0x17a9be04, 0x2c18f4df,
+    0xb7747f9d, 0xab2af7b4, 0xefc34d20, 0x2e096b7c, 0x1741a254, 0xe5b6a035, 0x213d42f6, 0x2c1c7c26,
+    0x61c2f50f, 0x6552daf9, 0xd2c231f8, 0x25130f69, 0xd8167fa2, 0x0418f2c8, 0x001a96a6, 0x0d1526ab,
+    0x63315c21, 0x5e0a72ec, 0x49bafefd, 0x187908d9, 0x8d0dbd86, 0x311170a7, 0x3e9b640c, 0xcc3e10d7,
+    0xd5cad3b6, 0x0caec388, 0xf73001e1, 0x6c728aff, 0x71eae2a1, 0x1f9af36e, 0xcfcbd12f, 0xc1de8417,
+    0xac07be6b, 0xcb44a1d8, 0x8b9b0f56, 0x013988c3, 0xb1c52fca, 0xb4be31cd, 0xd8782806, 0x12a3a4e2,
+    0x6f7de532, 0x58fd7eb6, 0xd01ee900, 0x24adffc2, 0xf4990fc5, 0x9711aac5, 0x001d7b95, 0x82e5e7d2,
+    0x109873f6, 0x00613096, 0xc32d9521, 0xada121ff, 0x29908415, 0x7fbb977f, 0xaf9eb3db, 0x29c9ed2a,
+    0x5ce2a465, 0xa730f32c, 0xd0aa3fe8, 0x8a5cc091, 0xd49e2ce7, 0x0ce454a9, 0xd60acd86, 0x015f1919,
+    0x77079103, 0xdea03af6, 0x78a8565e, 0xdee356df, 0x21f05cbe, 0x8b75e387, 0xb3c50651, 0xb8a5c3ef,
+    0xd8eeb6d2, 0xe523be77, 0xc2154529, 0x2f69efdf, 0xafe67afb, 0xf470c4b2, 0xf3e0eb5b, 0xd6cc9876,
+    0x39e4460c, 0x1fda8538, 0x1987832f, 0xca007367, 0xa99144f8, 0x296b299e, 0x492fc295, 0x9266beab,
+    0xb5676e69, 0x9bd3ddda, 0xdf7e052f, 0xdb25701c, 0x1b5e51ee, 0xf65324e6, 0x6afce36c, 0x0316cc04,
+    0x8644213e, 0xb7dc59d0, 0x7965291f, 0xccd6fd43, 0x41823979, 0x932bcdf6, 0xb657c34d, 0x4edfd282,
+    0x7ae5290c, 0x3cb9536b, 0x851e20fe, 0x9833557e, 0x13ecf0b0, 0xd3ffb372, 0x3f85c5c1, 0x0aef7ed2
+};
+
+static const uint32_t S5[256] = {
+    0x7ec90c04, 0x2c6e74b9, 0x9b0e66df, 0xa6337911, 0xb86a7fff, 0x1dd358f5, 0x44dd9d44, 0x1731167f,
+    0x08fbf1fa, 0xe7f511cc, 0xd2051b00, 0x735aba00, 0x2ab722d8, 0x386381cb, 0xacf6243a, 0x69befd7a,
+    0xe6a2e77f, 0xf0c720cd, 0xc4494816, 0xccf5c180, 0x38851640, 0x15b0a848, 0xe68b18cb, 0x4caadeff,
+    0x5f480a01, 0x0412b2aa, 0x259814fc, 0x41d0efe2, 0x4e40b48d, 0x248eb6fb, 0x8dba1cfe, 0x41a99b02,
+    0x1a550a04, 0xba8f65cb, 0x7251f4e7, 0x95a51725, 0xc106ecd7, 0x97a5980a, 0xc539b9aa, 0x4d79fe6a,
+    0xf2f3f763, 0x68af8040, 0xed0c9e56, 0x11b4958b, 0xe1eb5a88, 0x8709e6b0, 0xd7e07156, 0x4e29fea7,
+    0x6366e52d, 0x02d1c000, 0xc4ac8e05, 0x9377f571, 0x0c05372a, 0x578535f2, 0x2261be02, 0xd642a0c9,
+    0xdf13a280, 0x74b55bd2, 0x682199c0, 0xd421e5ec, 0x53fb3ce8, 0xc8adedb3, 0x28a87fc9, 0x3d959981,
+    0x5c1ff900, 0xfe38d399, 0x0c4eff0b, 0x062407ea, 0xaa2f4fb1, 0x4fb96976, 0x90c79505, 0xb0a8a774,
+    0xef55a1ff, 0xe59ca2c2, 0xa6b62d27, 0xe66a4263, 0xdf65001f, 0x0ec50966, 0xdfdd55bc, 0x29de0655,
+    0x911e739a, 0x17af8975, 0x32c7911c, 0x89f89468, 0x0d01e980, 0x524755f4, 0x03b63cc9, 0x0cc844b2,
+    0xbcf3f0aa, 0x87ac36e9, 0xe53a7426, 0x01b3d82b, 0x1a9e7449, 0x64ee2d7e, 0xcddbb1da, 0x01c94910,
+    0xb868bf80, 0x0d26f3fd, 0x9342ede7, 0x04a5c284, 0x636737b6, 0x50f5b616, 0xf24766e3, 0x8eca36c1,
+    0x136e05db, 0xfef18391, 0xfb887a37, 0xd6e7f7d4, 0xc7fb7dc9, 0x3063fcdf, 0xb6f589de, 0xec2941da,
+    0x26e46695, 0xb7566419, 0xf654efc5, 0xd08d58b7, 0x48925401, 0xc1bacb7f, 0xe5ff550f, 0xb6083049,
+    0x5bb5d0e8, 0x87d72e5a, 0xab6a6ee1, 0x223a66ce, 0xc62bf3cd, 0x9e0885f9, 0x68cb3e47, 0x086c010f,
+    0xa21de820, 0xd18b69de, 0xf3f65777, 0xfa02c3f6, 0x407edac3, 0xcbb3d550, 0x1793084d, 0xb0d70eba,
+    0x0ab378d5, 0xd951fb0c, 0xded7da56, 0x4124bbe4, 0x94ca0b56, 0x0f5755d1, 0xe0e1e56e, 0x6184b5be,
+    0x580a249f, 0x94f74bc0, 0xe327888e, 0x9f7b5561, 0xc3dc0280, 0x05687715, 0x646c6bd7, 0x44904db3,
+    0x66b4f0a3, 0xc0f1648a, 0x697ed5af, 0x49e92ff6, 0x309e374f, 0x2cb6356a, 0x85808573, 0x4991f840,
+    0x76f0ae02, 0x083be84d, 0x28421c9a, 0x44489406, 0x736e4cb8, 0xc1092910, 0x8bc95fc6, 0x7d869cf4,
+    0x134f616f, 0x2e77118d, 0xb31b2be1, 0xaa90b472, 0x3ca5d717, 0x7d161bba, 0x9cad9010, 0xaf462ba2,
+    0x9fe459d2, 0x45d34559, 0xd9f2da13, 0xdbc65487, 0xf3e4f94e, 0x176d486f, 0x097c13ea, 0x631da5c7,
+    0x445f7382, 0x175683f4, 0xcdc66a97, 0x70be0288, 0xb3cdcf72, 0x6e5dd2f3, 0x20936079, 0x459b80a5,
+    0xbe60e2db, 0xa9c23101, 0xeba5315c, 0x224e42f2, 0x1c5c1572, 0xf6721b2c, 0x1ad2fff3, 0x8c25404e,
+    0x324ed72f, 0x4067b7fd, 0x0523138e, 0x5ca3bc78, 0xdc0fd66e, 0x75922283, 0x784d6b17, 0x58ebb16e,
+    0x44094f85, 0x3f481d87, 0xfcfeae7b, 0x77b5ff76, 0x8c2302bf, 0xaaf47556, 0x5f46b02a, 0x2b092801,
+    0x3d38f5f7, 0x0ca81f36, 0x52af4a8a, 0x66d5e7c0, 0xdf3b0874, 0x95055110, 0x1b5ad7a8, 0xf61ed5ad,
+    0x6cf6e479, 0x20758184, 0xd0cefa65, 0x88f7be58, 0x4a046826, 0x0ff6f8f3, 0xa09c7f70, 0x5346aba0,
+    0x5ce96c28, 0xe176eda3, 0x6bac307f, 0x376829d2, 0x85360fa9, 0x17e3fe2a, 0x24b79767, 0xf5a96b20,
+    0xd6cd2595, 0x68ff1ebf, 0x7555442c, 0xf19f06be, 0xf9e0659a, 0xeeb9491d, 0x34010718, 0xbb30cab8,
+    0xe822fe15, 0x88570983, 0x750e6249, 0xda627e55, 0x5e76ffa8, 0xb1534546, 0x6d47de08, 0xefe9e7d4
+};
+
+static const uint32_t S6[256] = {
+    0xf6fa8f9d, 0x2cac6ce1, 0x4ca34867, 0xe2337f7c, 0x95db08e7, 0x016843b4, 0xeced5cbc, 0x325553ac,
+    0xbf9f0960, 0xdfa1e2ed, 0x83f0579d, 0x63ed86b9, 0x1ab6a6b8, 0xde5ebe39, 0xf38ff732, 0x8989b138,
+    0x33f14961, 0xc01937bd, 0xf506c6da, 0xe4625e7e, 0xa308ea99, 0x4e23e33c, 0x79cbd7cc, 0x48a14367,
+    0xa3149619, 0xfec94bd5, 0xa114174a, 0xeaa01866, 0xa084db2d, 0x09a8486f, 0xa888614a, 0x2900af98,
+    0x01665991, 0xe1992863, 0xc8f30c60, 0x2e78ef3c, 0xd0d51932, 0xcf0fec14, 0xf7ca07d2, 0xd0a82072,
+    0xfd41197e, 0x9305a6b0, 0xe86be3da, 0x74bed3cd, 0x372da53c, 0x4c7f4448, 0xdab5d440, 0x6dba0ec3,
+    0x083919a7, 0x9fbaeed9, 0x49dbcfb0, 0x4e670c53, 0x5c3d9c01, 0x64bdb941, 0x2c0e636a, 0xba7dd9cd,
+    0xea6f7388, 0xe70bc762, 0x35f29adb, 0x5c4cdd8d, 0xf0d48d8c, 0xb88153e2, 0x08a19866, 0x1ae2eac8,
+    0x284caf89, 0xaa928223, 0x9334be53, 0x3b3a21bf, 0x16434be3, 0x9aea3906, 0xefe8c36e, 0xf890cdd9,
+    0x80226dae, 0xc340a4a3, 0xdf7e9c09, 0xa694a807, 0x5b7c5ecc, 0x221db3a6, 0x9a69a02f, 0x68818a54,
+    0xceb2296f, 0x53c0843a, 0xfe893655, 0x25bfe68a, 0xb4628abc, 0xcf222ebf, 0x25ac6f48, 0xa9a99387,
+    0x53bddb65, 0xe76ffbe7, 0xe967fd78, 0x0ba93563, 0x8e342bc1, 0xe8a11be9, 0x4980740d, 0xc8087dfc,
+    0x8de4bf99, 0xa11101a0, 0x7fd37975, 0xda5a26c0, 0xe81f994f, 0x9528cd89, 0xfd339fed, 0xb87834bf,
+    0x5f04456d, 0x22258698, 0xc9c4c83b, 0x2dc156be, 0x4f628daa, 0x57f55ec5, 0xe2220abe, 0xd2916ebf,
+    0x4ec75b95, 0x24f2c3c0, 0x42d15d99, 0xcd0d7fa0, 0x7b6e27ff, 0xa8dc8af0, 0x7345c106, 0xf41e232f,
+    0x35162386, 0xe6ea8926, 0x3333b094, 0x157ec6f2, 0x372b74af, 0x692573e4, 0xe9a9d848, 0xf3160289,
+    0x3a62ef1d, 0xa787e238, 0xf3a5f676, 0x74364853, 0x20951063, 0x4576698d, 0xb6fad407, 0x592af950,
+    0x36f73523, 0x4cfb6e87, 0x7da4cec0, 0x6c152daa, 0xcb0396a8, 0xc50dfe5d, 0xfcd707ab, 0x0921c42f,
+    0x89dff0bb, 0x5fe2be78, 0x448f4f33, 0x754613c9, 0x2b05d08d, 0x48b9d585, 0xdc049441, 0xc8098f9b,
+    0x7dede786, 0xc39a3373, 0x42410005, 0x6a091751, 0x0ef3c8a6, 0x890072d6, 0x28207682, 0xa9a9f7be,
+    0xbf32679d, 0xd45b5b75, 0xb353fd00, 0xcbb0e358, 0x830f220a, 0x1f8fb214, 0xd372cf08, 0xcc3c4a13,
+    0x8cf63166, 0x061c87be, 0x88c98f88, 0x6062e397, 0x47cf8e7a, 0xb6c85283, 0x3cc2acfb, 0x3fc06976,
+    0x4e8f0252, 0x64d8314d, 0xda3870e3, 0x1e665459, 0xc10908f0, 0x513021a5, 0x6c5b68b7, 0x822f8aa0,
+    0x3007cd3e, 0x74719eef, 0xdc872681, 0x073340d4, 0x7e432fd9, 0x0c5ec241, 0x8809286c, 0xf592d891,
+    0x08a930f6, 0x957ef305, 0xb7fbffbd, 0xc266e96f, 0x6fe4ac98, 0xb173ecc0, 0xbc60b42a, 0x953498da,
+    0xfba1ae12, 0x2d4bd736, 0x0f25faab, 0xa4f3fceb, 0xe2969123, 0x257f0c3d, 0x9348af49, 0x361400bc,
+    0xe8816f4a, 0x3814f200, 0xa3f94043, 0x9c7a54c2, 0xbc704f57, 0xda41e7f9, 0xc25ad33a, 0x54f4a084,
+    0xb17f5505, 0x59357cbe, 0xedbd15c8, 0x7f97c5ab, 0xba5ac7b5, 0xb6f6deaf, 0x3a479c3a, 0x5302da25,
+    0x653d7e6a, 0x54268d49, 0x51a477ea, 0x5017d55b, 0xd7d25d88, 0x44136c76, 0x0404a8c8, 0xb8e5a121,
+    0xb81a928a, 0x60ed5869, 0x97c55b96, 0xeaec991b, 0x29935913, 0x01fdb7f1, 0x088e8dfa, 0x9ab6f6f5,
+    0x3b4cbf9f, 0x4a5de3ab, 0xe6051d35, 0xa0e1d855, 0xd36b4cf1, 0xf544edeb, 0xb0e93524, 0xbebb8fbd,
+    0xa2d762cf, 0x49c92f54, 0x38b5f331, 0x7128a454, 0x48392905, 0xa65b1db8, 0x851c97bd, 0xd675cf2f
+};
+
+static const uint32_t S7[256] = {
+    0x85e04019, 0x332bf567, 0x662dbfff, 0xcfc65693, 0x2a8d7f6f, 0xab9bc912, 0xde6008a1, 0x2028da1f,
+    0x0227bce7, 0x4d642916, 0x18fac300, 0x50f18b82, 0x2cb2cb11, 0xb232e75c, 0x4b3695f2, 0xb28707de,
+    0xa05fbcf6, 0xcd4181e9, 0xe150210c, 0xe24ef1bd, 0xb168c381, 0xfde4e789, 0x5c79b0d8, 0x1e8bfd43,
+    0x4d495001, 0x38be4341, 0x913cee1d, 0x92a79c3f, 0x089766be, 0xbaeeadf4, 0x1286becf, 0xb6eacb19,
+    0x2660c200, 0x7565bde4, 0x64241f7a, 0x8248dca9, 0xc3b3ad66, 0x28136086, 0x0bd8dfa8, 0x356d1cf2,
+    0x107789be, 0xb3b2e9ce, 0x0502aa8f, 0x0bc0351e, 0x166bf52a, 0xeb12ff82, 0xe3486911, 0xd34d7516,
+    0x4e7b3aff, 0x5f43671b, 0x9cf6e037, 0x4981ac83, 0x334266ce, 0x8c9341b7, 0xd0d854c0, 0xcb3a6c88,
+    0x47bc2829, 0x4725ba37, 0xa66ad22b, 0x7ad61f1e, 0x0c5cbafa, 0x4437f107, 0xb6e79962, 0x42d2d816,
+    0x0a961288, 0xe1a5c06e, 0x13749e67, 0x72fc081a, 0xb1d139f7, 0xf9583745, 0xcf19df58, 0xbec3f756,
+    0xc06eba30, 0x07211b24, 0x45c28829, 0xc95e317f, 0xbc8ec511, 0x38bc46e9, 0xc6e6fa14, 0xbae8584a,
+    0xad4ebc46, 0x468f508b, 0x7829435f, 0xf124183b, 0x821dba9f, 0xaff60ff4, 0xea2c4e6d, 0x16e39264,
+    0x92544a8b, 0x009b4fc3, 0xaba68ced, 0x9ac96f78, 0x06a5b79a, 0xb2856e6e, 0x1aec3ca9, 0xbe838688,
+    0x0e0804e9, 0x55f1be56, 0xe7e5363b, 0xb3a1f25d, 0xf7debb85, 0x61fe033c, 0x16746233, 0x3c034c28,
+    0xda6d0c74, 0x79aac56c, 0x3ce4e1ad, 0x51f0c802, 0x98f8f35a, 0x1626a49f, 0xeed82b29, 0x1d382fe3,
+    0x0c4fb99a, 0xbb325778, 0x3ec6d97b, 0x6e77a6a9, 0xcb658b5c, 0xd45230c7, 0x2bd1408b, 0x60c03eb7,
+    0xb9068d78, 0xa33754f4, 0xf430c87d, 0xc8a71302, 0xb96d8c32, 0xebd4e7be, 0xbe8b9d2d, 0x7979fb06,
+    0xe7225308, 0x8b75cf77, 0x11ef8da4, 0xe083c858, 0x8d6b786f, 0x5a6317a6, 0xfa5cf7a0, 0x5dda0033,
+    0xf28ebfb0, 0xf5b9c310, 0xa0eac280, 0x08b9767a, 0xa3d9d2b0, 0x79d34217, 0x021a718d, 0x9ac6336a,
+    0x2711fd60, 0x438050e3, 0x069908a8, 0x3d7fedc4, 0x826d2bef, 0x4eeb8476, 0x488dcf25, 0x36c9d566,
+    0x28e74e41, 0xc2610aca, 0x3d49a9cf, 0xbae3b9df, 0xb65f8de6, 0x92aeaf64, 0x3ac7d5e6, 0x9ea80509,
+    0xf22b017d, 0xa4173f70, 0xdd1e16c3, 0x15e0d7f9, 0x50b1b887, 0x2b9f4fd5, 0x625aba82, 0x6a017962,
+    0x2ec01b9c, 0x15488aa9, 0xd716e740, 0x40055a2c, 0x93d29a22, 0xe32dbf9a, 0x058745b9, 0x3453dc1e,
+    0xd699296e, 0x496cff6f, 0x1c9f4986, 0xdfe2ed07, 0xb87242d1, 0x19de7eae, 0x053e561a, 0x15ad6f8c,
+    0x66626c1c, 0x7154c24c, 0xea082b2a, 0x93eb2939, 0x17dcb0f0, 0x58d4f2ae, 0x9ea294fb, 0x52cf564c,
+    0x9883fe66, 0x2ec40581, 0x763953c3, 0x01d6692e, 0xd3a0c108, 0xa1e7160e, 0xe4f2dfa6, 0x693ed285,
+    0x74904698, 0x4c2b0edd, 0x4f757656, 0x5d393378, 0xa132234f, 0x3d321c5d, 0xc3f5e194, 0x4b269301,
+    0xc79f022f, 0x3c997e7e, 0x5e4f9504, 0x3ffafbbd, 0x76f7ad0e, 0x296693f4, 0x3d1fce6f, 0xc61e45be,
+    0xd3b5ab34, 0xf72bf9b7, 0x1b0434c0, 0x4e72b567, 0x5592a33d, 0xb5229301, 0xcfd2a87f, 0x60aeb767,
+    0x1814386b, 0x30bcc33d, 0x38a0c07d, 0xfd1606f2, 0xc363519b, 0x589dd390, 0x5479f8e6, 0x1cb8d647,
+    0x97fd61a9, 0xea7759f4, 0x2d57539d, 0x569a58cf, 0xe84e63ad, 0x462e1b78, 0x6580f87e, 0xf3817914,
+    0x91da55f4, 0x40a230f3, 0xd1988f35, 0xb6e318d2, 0x3ffa50bc, 0x3d40f021, 0xc3c0bdae, 0x4958c24c,
+    0x518f36b2, 0x84b1d370, 0x0fedce83, 0x878ddada, 0xf2a279c7, 0x94e01be8, 0x90716f4b, 0x954b8aa3
+};
+
+static const uint32_t S8[256] = {
+    0xe216300d, 0xbbddfffc, 0xa7ebdabd, 0x35648095, 0x7789f8b7, 0xe6c1121b, 0x0e241600, 0x052ce8b5,
+    0x11a9cfb0, 0xe5952f11, 0xece7990a, 0x9386d174, 0x2a42931c, 0x76e38111, 0xb12def3a, 0x37ddddfc,
+    0xde9adeb1, 0x0a0cc32c, 0xbe197029, 0x84a00940, 0xbb243a0f, 0xb4d137cf, 0xb44e79f0, 0x049eedfd,
+    0x0b15a15d, 0x480d3168, 0x8bbbde5a, 0x669ded42, 0xc7ece831, 0x3f8f95e7, 0x72df191b, 0x7580330d,
+    0x94074251, 0x5c7dcdfa, 0xabbe6d63, 0xaa402164, 0xb301d40a, 0x02e7d1ca, 0x53571dae, 0x7a3182a2,
+    0x12a8ddec, 0xfdaa335d, 0x176f43e8, 0x71fb46d4, 0x38129022, 0xce949ad4, 0xb84769ad, 0x965bd862,
+    0x82f3d055, 0x66fb9767, 0x15b80b4e, 0x1d5b47a0, 0x4cfde06f, 0xc28ec4b8, 0x57e8726e, 0x647a78fc,
+    0x99865d44, 0x608bd593, 0x6c200e03, 0x39dc5ff6, 0x5d0b00a3, 0xae63aff2, 0x7e8bd632, 0x70108c0c,
+    0xbbd35049, 0x2998df04, 0x980cf42a, 0x9b6df491, 0x9e7edd53, 0x06918548, 0x58cb7e07, 0x3b74ef2e,
+    0x522fffb1, 0xd24708cc, 0x1c7e27cd, 0xa4eb215b, 0x3cf1d2e2, 0x19b47a38, 0x424f7618, 0x35856039,
+    0x9d17dee7, 0x27eb35e6, 0xc9aff67b, 0x36baf5b8, 0x09c467cd, 0xc18910b1, 0xe11dbf7b, 0x06cd1af8,
+    0x7170c608, 0x2d5e3354, 0xd4de495a, 0x64c6d006, 0xbcc0c62c, 0x3dd00db3, 0x708f8f34, 0x77d51b42,
+    0x264f620f, 0x24b8d2bf, 0x15c1b79e, 0x46a52564, 0xf8d7e54e, 0x3e378160, 0x7895cda5, 0x859c15a5,
+    0xe6459788, 0xc37bc75f, 0xdb07ba0c, 0x0676a3ab, 0x7f229b1e, 0x31842e7b, 0x24259fd7, 0xf8bef472,
+    0x835ffcb8, 0x6df4c1f2, 0x96f5b195, 0xfd0af0fc, 0xb0fe134c, 0xe2506d3d, 0x4f9b12ea, 0xf215f225,
+    0xa223736f, 0x9fb4c428, 0x25d04979, 0x34c713f8, 0xc4618187, 0xea7a6e98, 0x7cd16efc, 0x1436876c,
+    0xf1544107, 0xbedeee14, 0x56e9af27, 0xa04aa441, 0x3cf7c899, 0x92ecbae6, 0xdd67016d, 0x151682eb,
+    0xa842eedf, 0xfdba60b4, 0xf1907b75, 0x20e3030f, 0x24d8c29e, 0xe139673b, 0xefa63fb8, 0x71873054,
+    0xb6f2cf3b, 0x9f326442, 0xcb15a4cc, 0xb01a4504, 0xf1e47d8d, 0x844a1be5, 0xbae7dfdc, 0x42cbda70,
+    0xcd7dae0a, 0x57e85b7a, 0xd53f5af6, 0x20cf4d8c, 0xcea4d428, 0x79d130a4, 0x3486ebfb, 0x33d3cddc,
+    0x77853b53, 0x37effcb5, 0xc5068778, 0xe580b3e6, 0x4e68b8f4, 0xc5c8b37e, 0x0d809ea2, 0x398feb7c,
+    0x132a4f94, 0x43b7950e, 0x2fee7d1c, 0x223613bd, 0xdd06caa2, 0x37df932b, 0xc4248289, 0xacf3ebc3,
+    0x5715f6b7, 0xef3478dd, 0xf267616f, 0xc148cbe4, 0x9052815e, 0x5e410fab, 0xb48a2465, 0x2eda7fa4,
+    0xe87b40e4, 0xe98ea084, 0x5889e9e1, 0xefd390fc, 0xdd07d35b, 0xdb485694, 0x38d7e5b2, 0x57720101,
+    0x730edebc, 0x5b643113, 0x94917e4f, 0x503c2fba, 0x646f1282, 0x7523d24a, 0xe0779695, 0xf9c17a8f,
+    0x7a5b2121, 0xd187b896, 0x29263a4d, 0xba510cdf, 0x81f47c9f, 0xad1163ed, 0xea7b5965, 0x1a00726e,
+    0x11403092, 0x00da6d77, 0x4a0cdd61, 0xad1f4603, 0x605bdfb0, 0x9eedc364, 0x22ebe6a8, 0xcee7d28a,
+    0xa0e736a0, 0x5564a6b9, 0x10853209, 0xc7eb8f37, 0x2de705ca, 0x8951570f, 0xdf09822b, 0xbd691a6c,
+    0xaa12e4f2, 0x87451c0f, 0xe0f6a27a, 0x3ada4819, 0x4cf1764f, 0x0d771c2b, 0x67cdb156, 0x350d8384,
+    0x5938fa0f, 0x42399ef3, 0x36997b07, 0x0e84093d, 0x4aa93e61, 0x8360d87b, 0x1fa98b0c, 0x1149382c,
+    0xe97625a5, 0x0614d1b7, 0x0e25244b, 0x0c768347, 0x589e8d82, 0x0d2059d1, 0xa466bb1e, 0xf8da0a82,
+    0x04f19130, 0xba6e4ec0, 0x99265164, 0x1ee7230d, 0x50b2ad80, 0xeaee6801, 0x8db2a283, 0xea8bf59e
+};
+
+static void generate_round_keys(int rnds, uint32_t* K, uint32_t* x, uint32_t* z)
+{
+    COMPUTE_Z;
+
+    K[1] = S5[IA(z[2])] ^ S6[IB(z[2])] ^ S7[ID(z[1])] ^ S8[IC(z[1])] ^ S5[IC(z[0])];
+    K[2] = S5[IC(z[2])] ^ S6[ID(z[2])] ^ S7[IB(z[1])] ^ S8[IA(z[1])] ^ S6[IC(z[1])];
+    K[3] = S5[IA(z[3])] ^ S6[IB(z[3])] ^ S7[ID(z[0])] ^ S8[IC(z[0])] ^ S7[IB(z[2])];
+    K[4] = S5[IC(z[3])] ^ S6[ID(z[3])] ^ S7[IB(z[0])] ^ S8[IA(z[0])] ^ S8[IA(z[3])];
+
+    COMPUTE_X;
+
+    K[5] = S5[ID(x[0])] ^ S6[IC(x[0])] ^ S7[IA(x[3])] ^ S8[IB(x[3])] ^ S5[IA(x[2])];
+    K[6] = S5[IB(x[0])] ^ S6[IA(x[0])] ^ S7[IC(x[3])] ^ S8[ID(x[3])] ^ S6[IB(x[3])];
+    K[7] = S5[ID(x[1])] ^ S6[IC(x[1])] ^ S7[IA(x[2])] ^ S8[IB(x[2])] ^ S7[ID(x[0])];
+    K[8] = S5[IB(x[1])] ^ S6[IA(x[1])] ^ S7[IC(x[2])] ^ S8[ID(x[2])] ^ S8[ID(x[1])];
+
+    COMPUTE_Z;
+
+    K[9] = S5[ID(z[0])] ^ S6[IC(z[0])] ^ S7[IA(z[3])] ^ S8[IB(z[3])] ^ S5[IB(z[2])];
+    K[10] = S5[IB(z[0])] ^ S6[IA(z[0])] ^ S7[IC(z[3])] ^ S8[ID(z[3])] ^ S6[IA(z[3])];
+    K[11] = S5[ID(z[1])] ^ S6[IC(z[1])] ^ S7[IA(z[2])] ^ S8[IB(z[2])] ^ S7[IC(z[0])];
+    K[12] = S5[IB(z[1])] ^ S6[IA(z[1])] ^ S7[IC(z[2])] ^ S8[ID(z[2])] ^ S8[IC(z[1])];
+
+    COMPUTE_X;
+
+    if (rnds == 16) {
+        K[13] = S5[IA(x[2])] ^ S6[IB(x[2])] ^ S7[ID(x[1])] ^ S8[IC(x[1])] ^ S5[ID(x[0])];
+        K[14] = S5[IC(x[2])] ^ S6[ID(x[2])] ^ S7[IB(x[1])] ^ S8[IA(x[1])] ^ S6[ID(x[1])];
+        K[15] = S5[IA(x[3])] ^ S6[IB(x[3])] ^ S7[ID(x[0])] ^ S8[IC(x[0])] ^ S7[IA(x[2])];
+        K[16] = S5[IC(x[3])] ^ S6[ID(x[3])] ^ S7[IB(x[0])] ^ S8[IA(x[0])] ^ S8[IB(x[3])];
+    }
+}
+
+static void encipher(AVCAST5* cs, uint8_t* dst, const uint8_t* src)
+{
+    uint32_t r, l, f, I;
+    l = AV_RB32(src);
+    r = AV_RB32(src + 4);
+    F1(l, r, 1);
+    F2(r, l, 2);
+    F3(l, r, 3);
+    F1(r, l, 4);
+    F2(l, r, 5);
+    F3(r, l, 6);
+    F1(l, r, 7);
+    F2(r, l, 8);
+    F3(l, r, 9);
+    F1(r, l, 10);
+    F2(l, r, 11);
+    F3(r, l, 12);
+    if (cs->rounds == 16) {
+        F1(l, r, 13);
+        F2(r, l, 14);
+        F3(l, r, 15);
+        F1(r, l, 16);
+    }
+    AV_WB32(dst, r);
+    AV_WB32(dst + 4, l);
+}
+
+static void decipher(AVCAST5* cs, uint8_t* dst, const uint8_t* src, uint8_t *iv)
+{
+    uint32_t f, I, r, l;
+    l = AV_RB32(src);
+    r = AV_RB32(src + 4);
+    if (cs->rounds == 16) {
+        F1(l, r, 16);
+        F3(r, l, 15);
+        F2(l, r, 14);
+        F1(r, l, 13);
+    }
+    F3(l, r, 12);
+    F2(r, l, 11);
+    F1(l, r, 10);
+    F3(r, l, 9);
+    F2(l, r, 8);
+    F1(r, l, 7);
+    F3(l, r, 6);
+    F2(r, l, 5);
+    F1(l, r, 4);
+    F3(r, l, 3);
+    F2(l, r, 2);
+    F1(r, l, 1);
+    if (iv) {
+        r ^= AV_RB32(iv);
+        l ^= AV_RB32(iv + 4);
+        memcpy(iv, src, 8);
+    }
+    AV_WB32(dst, r);
+    AV_WB32(dst + 4, l);
+}
+
+struct AVCAST5 *av_cast5_alloc(void)
+{
+    return av_mallocz(sizeof(struct AVCAST5));
+}
+
+av_cold int av_cast5_init(AVCAST5* cs, const uint8_t *key, int key_bits)
+{
+    uint8_t newKey[16];
+    int i;
+    uint32_t p[4], q[4];
+    if (key_bits % 8 || key_bits < 40 || key_bits > 128)
+        return AVERROR(EINVAL);
+    memset(newKey, 0, sizeof(newKey));
+    memcpy(newKey, key, key_bits >> 3);
+
+    cs->rounds = key_bits <= 80 ? 12 : 16;
+    for (i = 0; i < 4; i++)
+        q[i] = AV_RB32(newKey + (4 * i));
+    generate_round_keys(cs->rounds, cs->Km, q, p);
+    generate_round_keys(cs->rounds, cs->Kr, q, p);
+    for (i = 0; i <= cs->rounds; i++)
+        cs->Kr[i] = cs->Kr[i] & 0x1f;
+    return 0;
+}
+
+void av_cast5_crypt2(AVCAST5* cs, uint8_t* dst, const uint8_t* src, int count, uint8_t *iv, int decrypt)
+{
+    int i;
+    while (count--) {
+        if (decrypt) {
+            decipher(cs, dst, src, iv);
+        } else {
+            if (iv) {
+                for (i = 0; i < 8; i++)
+                    dst[i] = src[i] ^ iv[i];
+                encipher(cs, dst, dst);
+                memcpy(iv, dst, 8);
+            } else {
+                encipher(cs, dst, src);
+            }
+        }
+        src = src + 8;
+        dst = dst + 8;
+    }
+}
+void av_cast5_crypt(AVCAST5* cs, uint8_t* dst, const uint8_t* src, int count, int decrypt)
+{
+    while (count--) {
+        if (decrypt){
+            decipher(cs, dst, src, NULL);
+        } else {
+            encipher(cs, dst, src);
+        }
+        src = src + 8;
+        dst = dst + 8;
+    }
+}

ffmpeg/libavutil/cast5.h

@@ -0,0 +1,80 @@
+/*
+ * An implementation of the CAST128 algorithm as mentioned in RFC2144
+ * Copyright (c) 2014 Supraja Meedinti
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CAST5_H
+#define AVUTIL_CAST5_H
+
+#include <stdint.h>
+
+
+/**
+  * @file
+  * @brief Public header for libavutil CAST5 algorithm
+  * @defgroup lavu_cast5 CAST5
+  * @ingroup lavu_crypto
+  * @{
+  */
+
+extern const int av_cast5_size;
+
+struct AVCAST5;
+
+/**
+  * Allocate an AVCAST5 context
+  * To free the struct: av_free(ptr)
+  */
+struct AVCAST5 *av_cast5_alloc(void);
+/**
+  * Initialize an AVCAST5 context.
+  *
+  * @param ctx an AVCAST5 context
+  * @param key a key of 5,6,...16 bytes used for encryption/decryption
+  * @param key_bits number of keybits: possible are 40,48,...,128
+  * @return 0 on success, less than 0 on failure
+ */
+int av_cast5_init(struct AVCAST5 *ctx, const uint8_t *key, int key_bits);
+
+/**
+  * Encrypt or decrypt a buffer using a previously initialized context, ECB mode only
+  *
+  * @param ctx an AVCAST5 context
+  * @param dst destination array, can be equal to src
+  * @param src source array, can be equal to dst
+  * @param count number of 8 byte blocks
+  * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_cast5_crypt(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, int decrypt);
+
+/**
+  * Encrypt or decrypt a buffer using a previously initialized context
+  *
+  * @param ctx an AVCAST5 context
+  * @param dst destination array, can be equal to src
+  * @param src source array, can be equal to dst
+  * @param count number of 8 byte blocks
+  * @param iv initialization vector for CBC mode, NULL for ECB mode
+  * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_cast5_crypt2(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
+/**
+ * @}
+ */
+#endif /* AVUTIL_CAST5_H */

ffmpeg/libavutil/channel_layout.c

@@ -0,0 +1,977 @@
+/*
+ * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * audio channel layout utility functions
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "avassert.h"
+#include "channel_layout.h"
+#include "bprint.h"
+#include "common.h"
+#include "error.h"
+#include "macros.h"
+#include "mem.h"
+#include "opt.h"
+
+#define CHAN_IS_AMBI(x) ((x) >= AV_CHAN_AMBISONIC_BASE &&\
+                         (x) <= AV_CHAN_AMBISONIC_END)
+
+struct channel_name {
+    const char *name;
+    const char *description;
+};
+
+static const struct channel_name channel_names[] = {
+    [AV_CHAN_FRONT_LEFT           ] = { "FL",        "front left"            },
+    [AV_CHAN_FRONT_RIGHT          ] = { "FR",        "front right"           },
+    [AV_CHAN_FRONT_CENTER         ] = { "FC",        "front center"          },
+    [AV_CHAN_LOW_FREQUENCY        ] = { "LFE",       "low frequency"         },
+    [AV_CHAN_BACK_LEFT            ] = { "BL",        "back left"             },
+    [AV_CHAN_BACK_RIGHT           ] = { "BR",        "back right"            },
+    [AV_CHAN_FRONT_LEFT_OF_CENTER ] = { "FLC",       "front left-of-center"  },
+    [AV_CHAN_FRONT_RIGHT_OF_CENTER] = { "FRC",       "front right-of-center" },
+    [AV_CHAN_BACK_CENTER          ] = { "BC",        "back center"           },
+    [AV_CHAN_SIDE_LEFT            ] = { "SL",        "side left"             },
+    [AV_CHAN_SIDE_RIGHT           ] = { "SR",        "side right"            },
+    [AV_CHAN_TOP_CENTER           ] = { "TC",        "top center"            },
+    [AV_CHAN_TOP_FRONT_LEFT       ] = { "TFL",       "top front left"        },
+    [AV_CHAN_TOP_FRONT_CENTER     ] = { "TFC",       "top front center"      },
+    [AV_CHAN_TOP_FRONT_RIGHT      ] = { "TFR",       "top front right"       },
+    [AV_CHAN_TOP_BACK_LEFT        ] = { "TBL",       "top back left"         },
+    [AV_CHAN_TOP_BACK_CENTER      ] = { "TBC",       "top back center"       },
+    [AV_CHAN_TOP_BACK_RIGHT       ] = { "TBR",       "top back right"        },
+    [AV_CHAN_STEREO_LEFT          ] = { "DL",        "downmix left"          },
+    [AV_CHAN_STEREO_RIGHT         ] = { "DR",        "downmix right"         },
+    [AV_CHAN_WIDE_LEFT            ] = { "WL",        "wide left"             },
+    [AV_CHAN_WIDE_RIGHT           ] = { "WR",        "wide right"            },
+    [AV_CHAN_SURROUND_DIRECT_LEFT ] = { "SDL",       "surround direct left"  },
+    [AV_CHAN_SURROUND_DIRECT_RIGHT] = { "SDR",       "surround direct right" },
+    [AV_CHAN_LOW_FREQUENCY_2      ] = { "LFE2",      "low frequency 2"       },
+    [AV_CHAN_TOP_SIDE_LEFT        ] = { "TSL",       "top side left"         },
+    [AV_CHAN_TOP_SIDE_RIGHT       ] = { "TSR",       "top side right"        },
+    [AV_CHAN_BOTTOM_FRONT_CENTER  ] = { "BFC",       "bottom front center"   },
+    [AV_CHAN_BOTTOM_FRONT_LEFT    ] = { "BFL",       "bottom front left"     },
+    [AV_CHAN_BOTTOM_FRONT_RIGHT   ] = { "BFR",       "bottom front right"    },
+    [AV_CHAN_SIDE_SURROUND_LEFT   ] = { "SSL",       "side surround left"    },
+    [AV_CHAN_SIDE_SURROUND_RIGHT  ] = { "SSR",       "side surround right"   },
+    [AV_CHAN_TOP_SURROUND_LEFT    ] = { "TTL",       "top surround left"     },
+    [AV_CHAN_TOP_SURROUND_RIGHT   ] = { "TTR",       "top surround right"    },
+    [AV_CHAN_BINAURAL_LEFT        ] = { "BIL",       "binaural left"         },
+    [AV_CHAN_BINAURAL_RIGHT       ] = { "BIR",       "binaural right"        },
+};
+
+void av_channel_name_bprint(AVBPrint *bp, enum AVChannel channel_id)
+{
+    if (channel_id >= AV_CHAN_AMBISONIC_BASE &&
+        channel_id <= AV_CHAN_AMBISONIC_END)
+        av_bprintf(bp, "AMBI%d", channel_id - AV_CHAN_AMBISONIC_BASE);
+    else if ((unsigned)channel_id < FF_ARRAY_ELEMS(channel_names) &&
+             channel_names[channel_id].name)
+        av_bprintf(bp, "%s", channel_names[channel_id].name);
+    else if (channel_id == AV_CHAN_NONE)
+        av_bprintf(bp, "NONE");
+    else if (channel_id == AV_CHAN_UNKNOWN)
+        av_bprintf(bp, "UNK");
+    else if (channel_id == AV_CHAN_UNUSED)
+        av_bprintf(bp, "UNSD");
+    else
+        av_bprintf(bp, "USR%d", channel_id);
+}
+
+int av_channel_name(char *buf, size_t buf_size, enum AVChannel channel_id)
+{
+    AVBPrint bp;
+
+    if (!buf && buf_size)
+        return AVERROR(EINVAL);
+
+    av_bprint_init_for_buffer(&bp, buf, buf_size);
+    av_channel_name_bprint(&bp, channel_id);
+
+    if (bp.len >= INT_MAX)
+        return AVERROR(ERANGE);
+    return bp.len + 1;
+}
+
+void av_channel_description_bprint(AVBPrint *bp, enum AVChannel channel_id)
+{
+    if (channel_id >= AV_CHAN_AMBISONIC_BASE &&
+        channel_id <= AV_CHAN_AMBISONIC_END)
+        av_bprintf(bp, "ambisonic ACN %d", channel_id - AV_CHAN_AMBISONIC_BASE);
+    else if ((unsigned)channel_id < FF_ARRAY_ELEMS(channel_names) &&
+             channel_names[channel_id].description)
+        av_bprintf(bp, "%s", channel_names[channel_id].description);
+    else if (channel_id == AV_CHAN_NONE)
+        av_bprintf(bp, "none");
+    else if (channel_id == AV_CHAN_UNKNOWN)
+        av_bprintf(bp, "unknown");
+    else if (channel_id == AV_CHAN_UNUSED)
+        av_bprintf(bp, "unused");
+    else
+        av_bprintf(bp, "user %d", channel_id);
+}
+
+int av_channel_description(char *buf, size_t buf_size, enum AVChannel channel_id)
+{
+    AVBPrint bp;
+
+    if (!buf && buf_size)
+        return AVERROR(EINVAL);
+
+    av_bprint_init_for_buffer(&bp, buf, buf_size);
+    av_channel_description_bprint(&bp, channel_id);
+
+    if (bp.len >= INT_MAX)
+        return AVERROR(ERANGE);
+    return bp.len + 1;
+}
+
+enum AVChannel av_channel_from_string(const char *str)
+{
+    int i;
+    char *endptr = (char *)str;
+    enum AVChannel id = AV_CHAN_NONE;
+
+    if (!strncmp(str, "AMBI", 4)) {
+        i = strtol(str + 4, NULL, 0);
+        if (i < 0 || i > AV_CHAN_AMBISONIC_END - AV_CHAN_AMBISONIC_BASE)
+            return AV_CHAN_NONE;
+        return AV_CHAN_AMBISONIC_BASE + i;
+    }
+
+    for (i = 0; i < FF_ARRAY_ELEMS(channel_names); i++) {
+        if (channel_names[i].name && !strcmp(str, channel_names[i].name))
+            return i;
+    }
+    if (!strcmp(str, "UNK"))
+        return AV_CHAN_UNKNOWN;
+    if (!strcmp(str, "UNSD"))
+        return AV_CHAN_UNUSED;
+
+    if (!strncmp(str, "USR", 3)) {
+        const char *p = str + 3;
+        id = strtol(p, &endptr, 0);
+    }
+    if (id >= 0 && !*endptr)
+        return id;
+
+    return AV_CHAN_NONE;
+}
+
+struct channel_layout_name {
+    const char *name;
+    AVChannelLayout layout;
+};
+
+static const struct channel_layout_name channel_layout_map[] = {
+    { "mono",           AV_CHANNEL_LAYOUT_MONO                },
+    { "stereo",         AV_CHANNEL_LAYOUT_STEREO              },
+    { "2.1",            AV_CHANNEL_LAYOUT_2POINT1             },
+    { "3.0",            AV_CHANNEL_LAYOUT_SURROUND            },
+    { "3.0(back)",      AV_CHANNEL_LAYOUT_2_1                 },
+    { "4.0",            AV_CHANNEL_LAYOUT_4POINT0             },
+    { "quad",           AV_CHANNEL_LAYOUT_QUAD                },
+    { "quad(side)",     AV_CHANNEL_LAYOUT_2_2                 },
+    { "3.1",            AV_CHANNEL_LAYOUT_3POINT1             },
+    { "5.0",            AV_CHANNEL_LAYOUT_5POINT0_BACK        },
+    { "5.0(side)",      AV_CHANNEL_LAYOUT_5POINT0             },
+    { "4.1",            AV_CHANNEL_LAYOUT_4POINT1             },
+    { "5.1",            AV_CHANNEL_LAYOUT_5POINT1_BACK        },
+    { "5.1(side)",      AV_CHANNEL_LAYOUT_5POINT1             },
+    { "6.0",            AV_CHANNEL_LAYOUT_6POINT0             },
+    { "6.0(front)",     AV_CHANNEL_LAYOUT_6POINT0_FRONT       },
+    { "3.1.2",          AV_CHANNEL_LAYOUT_3POINT1POINT2       },
+    { "hexagonal",      AV_CHANNEL_LAYOUT_HEXAGONAL           },
+    { "6.1",            AV_CHANNEL_LAYOUT_6POINT1             },
+    { "6.1(back)",      AV_CHANNEL_LAYOUT_6POINT1_BACK        },
+    { "6.1(front)",     AV_CHANNEL_LAYOUT_6POINT1_FRONT       },
+    { "7.0",            AV_CHANNEL_LAYOUT_7POINT0             },
+    { "7.0(front)",     AV_CHANNEL_LAYOUT_7POINT0_FRONT       },
+    { "7.1",            AV_CHANNEL_LAYOUT_7POINT1             },
+    { "7.1(wide)",      AV_CHANNEL_LAYOUT_7POINT1_WIDE_BACK   },
+    { "7.1(wide-side)", AV_CHANNEL_LAYOUT_7POINT1_WIDE        },
+    { "5.1.2",          AV_CHANNEL_LAYOUT_5POINT1POINT2       },
+    { "5.1.2(back)",    AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK  },
+    { "octagonal",      AV_CHANNEL_LAYOUT_OCTAGONAL           },
+    { "cube",           AV_CHANNEL_LAYOUT_CUBE                },
+    { "5.1.4",          AV_CHANNEL_LAYOUT_5POINT1POINT4_BACK  },
+    { "7.1.2",          AV_CHANNEL_LAYOUT_7POINT1POINT2       },
+    { "7.1.4",          AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK  },
+    { "7.2.3",          AV_CHANNEL_LAYOUT_7POINT2POINT3       },
+    { "9.1.4",          AV_CHANNEL_LAYOUT_9POINT1POINT4_BACK  },
+    { "9.1.6",          AV_CHANNEL_LAYOUT_9POINT1POINT6       },
+    { "hexadecagonal",  AV_CHANNEL_LAYOUT_HEXADECAGONAL       },
+    { "binaural",       AV_CHANNEL_LAYOUT_BINAURAL            },
+    { "downmix",        AV_CHANNEL_LAYOUT_STEREO_DOWNMIX,     },
+    { "22.2",           AV_CHANNEL_LAYOUT_22POINT2,           },
+};
+
+int av_channel_layout_custom_init(AVChannelLayout *channel_layout, int nb_channels)
+{
+    AVChannelCustom *map;
+
+    if (nb_channels <= 0)
+        return AVERROR(EINVAL);
+
+    map = av_calloc(nb_channels, sizeof(*channel_layout->u.map));
+    if (!map)
+        return AVERROR(ENOMEM);
+    for (int i = 0; i < nb_channels; i++)
+        map[i].id = AV_CHAN_UNKNOWN;
+
+    channel_layout->order       = AV_CHANNEL_ORDER_CUSTOM;
+    channel_layout->nb_channels = nb_channels;
+    channel_layout->u.map       = map;
+
+    return 0;
+}
+
+int av_channel_layout_from_mask(AVChannelLayout *channel_layout,
+                                uint64_t mask)
+{
+    if (!mask)
+        return AVERROR(EINVAL);
+
+    channel_layout->order       = AV_CHANNEL_ORDER_NATIVE;
+    channel_layout->nb_channels = av_popcount64(mask);
+    channel_layout->u.mask      = mask;
+
+    return 0;
+}
+
+static int parse_channel_list(AVChannelLayout *ch_layout, const char *str)
+{
+    int ret;
+    int nb_channels = 0;
+    AVChannelCustom *map = NULL;
+    AVChannelCustom custom = {0};
+
+    while (*str) {
+        char *channel, *chname;
+        int ret = av_opt_get_key_value(&str, "@", "+", AV_OPT_FLAG_IMPLICIT_KEY, &channel, &chname);
+        if (ret < 0) {
+            av_freep(&map);
+            return ret;
+        }
+        if (*str)
+            str++; // skip separator
+        if (!channel) {
+            channel = chname;
+            chname = NULL;
+        }
+        av_strlcpy(custom.name, chname ? chname : "", sizeof(custom.name));
+        custom.id = av_channel_from_string(channel);
+        av_free(channel);
+        av_free(chname);
+        if (custom.id == AV_CHAN_NONE) {
+            av_freep(&map);
+            return AVERROR(EINVAL);
+        }
+
+        av_dynarray2_add((void **)&map, &nb_channels, sizeof(custom), (void *)&custom);
+        if (!map)
+            return AVERROR(ENOMEM);
+    }
+
+    if (!nb_channels)
+        return AVERROR(EINVAL);
+
+    ch_layout->order = AV_CHANNEL_ORDER_CUSTOM;
+    ch_layout->u.map = map;
+    ch_layout->nb_channels = nb_channels;
+
+    ret = av_channel_layout_retype(ch_layout, 0, AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL);
+    av_assert0(ret == 0);
+
+    return 0;
+}
+
+int av_channel_layout_from_string(AVChannelLayout *channel_layout,
+                                  const char *str)
+{
+    int i, matches, ret;
+    int channels = 0, nb_channels = 0;
+    char *chlist, *end;
+    uint64_t mask = 0;
+
+    /* channel layout names */
+    for (i = 0; i < FF_ARRAY_ELEMS(channel_layout_map); i++) {
+        if (channel_layout_map[i].name && !strcmp(str, channel_layout_map[i].name)) {
+            *channel_layout = channel_layout_map[i].layout;
+            return 0;
+        }
+    }
+
+    /* This function is a channel layout initializer, so we have to
+     * zero-initialize before we start setting fields individually. */
+    memset(channel_layout, 0, sizeof(*channel_layout));
+
+    /* ambisonic */
+    if (!strncmp(str, "ambisonic ", 10)) {
+        const char *p = str + 10;
+        char *endptr;
+        AVChannelLayout extra = {0};
+        int order;
+
+        order = strtol(p, &endptr, 0);
+        if (order < 0 || order + 1  > INT_MAX / (order + 1) ||
+            (*endptr && *endptr != '+'))
+            return AVERROR(EINVAL);
+
+        channel_layout->order       = AV_CHANNEL_ORDER_AMBISONIC;
+        channel_layout->nb_channels = (order + 1) * (order + 1);
+
+        if (*endptr) {
+            int ret = av_channel_layout_from_string(&extra, endptr + 1);
+            if (ret < 0)
+                return ret;
+            if (extra.nb_channels >= INT_MAX - channel_layout->nb_channels) {
+                av_channel_layout_uninit(&extra);
+                return AVERROR(EINVAL);
+            }
+
+            if (extra.order == AV_CHANNEL_ORDER_NATIVE) {
+                channel_layout->u.mask = extra.u.mask;
+            } else {
+                channel_layout->order = AV_CHANNEL_ORDER_CUSTOM;
+                channel_layout->u.map =
+                    av_calloc(channel_layout->nb_channels + extra.nb_channels,
+                              sizeof(*channel_layout->u.map));
+                if (!channel_layout->u.map) {
+                    av_channel_layout_uninit(&extra);
+                    return AVERROR(ENOMEM);
+                }
+
+                for (i = 0; i < channel_layout->nb_channels; i++)
+                    channel_layout->u.map[i].id = AV_CHAN_AMBISONIC_BASE + i;
+                for (i = 0; i < extra.nb_channels; i++) {
+                    enum AVChannel ch = av_channel_layout_channel_from_index(&extra, i);
+                    if (CHAN_IS_AMBI(ch)) {
+                        av_channel_layout_uninit(channel_layout);
+                        av_channel_layout_uninit(&extra);
+                        return AVERROR(EINVAL);
+                    }
+                    channel_layout->u.map[channel_layout->nb_channels + i].id = ch;
+                    if (extra.order == AV_CHANNEL_ORDER_CUSTOM &&
+                        extra.u.map[i].name[0])
+                        av_strlcpy(channel_layout->u.map[channel_layout->nb_channels + i].name,
+                                   extra.u.map[i].name,
+                                   sizeof(channel_layout->u.map[channel_layout->nb_channels + i].name));
+                }
+            }
+            channel_layout->nb_channels += extra.nb_channels;
+            av_channel_layout_uninit(&extra);
+        }
+
+        return 0;
+    }
+
+    chlist = av_strdup(str);
+    if (!chlist)
+        return AVERROR(ENOMEM);
+
+    /* channel names */
+    matches = av_sscanf(str, "%d channels (%[^)]", &nb_channels, chlist);
+    ret = parse_channel_list(channel_layout, chlist);
+    av_freep(&chlist);
+    if (ret < 0 && ret != AVERROR(EINVAL))
+        return ret;
+
+    if (ret >= 0) {
+        end = strchr(str, ')');
+        if (matches == 2 && (nb_channels != channel_layout->nb_channels || !end || *++end)) {
+            av_channel_layout_uninit(channel_layout);
+            return AVERROR(EINVAL);
+        }
+        return 0;
+    }
+
+    errno = 0;
+    mask = strtoull(str, &end, 0);
+
+    /* channel layout mask */
+    if (!errno && !*end && !strchr(str, '-') && mask) {
+        av_channel_layout_from_mask(channel_layout, mask);
+        return 0;
+    }
+
+    errno = 0;
+    channels = strtol(str, &end, 10);
+
+    /* number of channels */
+    if (!errno && !strcmp(end, "c") && channels > 0) {
+        av_channel_layout_default(channel_layout, channels);
+        if (channel_layout->order == AV_CHANNEL_ORDER_NATIVE)
+            return 0;
+    }
+
+    /* number of unordered channels */
+    if (!errno && (!strcmp(end, "C") || !strcmp(end, " channels"))
+        && channels > 0) {
+        channel_layout->order = AV_CHANNEL_ORDER_UNSPEC;
+        channel_layout->nb_channels = channels;
+        return 0;
+    }
+
+    return AVERROR(EINVAL);
+}
+
+void av_channel_layout_uninit(AVChannelLayout *channel_layout)
+{
+    if (channel_layout->order == AV_CHANNEL_ORDER_CUSTOM)
+        av_freep(&channel_layout->u.map);
+    memset(channel_layout, 0, sizeof(*channel_layout));
+}
+
+int av_channel_layout_copy(AVChannelLayout *dst, const AVChannelLayout *src)
+{
+    av_channel_layout_uninit(dst);
+    *dst = *src;
+    if (src->order == AV_CHANNEL_ORDER_CUSTOM) {
+        dst->u.map = av_malloc_array(src->nb_channels, sizeof(*dst->u.map));
+        if (!dst->u.map)
+            return AVERROR(ENOMEM);
+        memcpy(dst->u.map, src->u.map, src->nb_channels * sizeof(*src->u.map));
+    }
+    return 0;
+}
+
+static int64_t masked_description(const AVChannelLayout *channel_layout, int start_channel)
+{
+    uint64_t mask = 0;
+    for (int i = start_channel; i < channel_layout->nb_channels; i++) {
+        enum AVChannel ch = channel_layout->u.map[i].id;
+        if (ch >= 0 && ch < 63 && mask < (1ULL << ch))
+            mask |= (1ULL << ch);
+        else
+            return AVERROR(EINVAL);
+    }
+    return mask;
+}
+
+static int has_channel_names(const AVChannelLayout *channel_layout)
+{
+    if (channel_layout->order != AV_CHANNEL_ORDER_CUSTOM)
+        return 0;
+    for (int i = 0; i < channel_layout->nb_channels; i++)
+        if (channel_layout->u.map[i].name[0])
+            return 1;
+    return 0;
+}
+
+int av_channel_layout_ambisonic_order(const AVChannelLayout *channel_layout)
+{
+    int i, highest_ambi, order;
+
+    if (channel_layout->order != AV_CHANNEL_ORDER_AMBISONIC &&
+        channel_layout->order != AV_CHANNEL_ORDER_CUSTOM)
+        return AVERROR(EINVAL);
+
+    highest_ambi = -1;
+    if (channel_layout->order == AV_CHANNEL_ORDER_AMBISONIC)
+        highest_ambi = channel_layout->nb_channels - av_popcount64(channel_layout->u.mask) - 1;
+    else {
+        const AVChannelCustom *map = channel_layout->u.map;
+        av_assert0(channel_layout->order == AV_CHANNEL_ORDER_CUSTOM);
+
+        for (i = 0; i < channel_layout->nb_channels; i++) {
+            int is_ambi = CHAN_IS_AMBI(map[i].id);
+
+            /* ambisonic following non-ambisonic */
+            if (i > 0 && is_ambi && !CHAN_IS_AMBI(map[i - 1].id))
+                return AVERROR(EINVAL);
+
+            /* non-default ordering */
+            if (is_ambi && map[i].id - AV_CHAN_AMBISONIC_BASE != i)
+                return AVERROR(EINVAL);
+
+            if (CHAN_IS_AMBI(map[i].id))
+                highest_ambi = i;
+        }
+    }
+    /* no ambisonic channels*/
+    if (highest_ambi < 0)
+        return AVERROR(EINVAL);
+
+    order = floor(sqrt(highest_ambi));
+    /* incomplete order - some harmonics are missing */
+    if ((order + 1) * (order + 1) != highest_ambi + 1)
+        return AVERROR(EINVAL);
+
+    return order;
+}
+
+static enum AVChannelOrder canonical_order(AVChannelLayout *channel_layout)
+{
+    int has_known_channel = 0;
+    int order;
+
+    if (channel_layout->order != AV_CHANNEL_ORDER_CUSTOM)
+        return channel_layout->order;
+
+    if (has_channel_names(channel_layout))
+        return AV_CHANNEL_ORDER_CUSTOM;
+
+    for (int i = 0; i < channel_layout->nb_channels && !has_known_channel; i++)
+        if (channel_layout->u.map[i].id != AV_CHAN_UNKNOWN)
+            has_known_channel = 1;
+    if (!has_known_channel)
+        return AV_CHANNEL_ORDER_UNSPEC;
+
+    if (masked_description(channel_layout, 0) > 0)
+        return AV_CHANNEL_ORDER_NATIVE;
+
+    order = av_channel_layout_ambisonic_order(channel_layout);
+    if (order >= 0 && masked_description(channel_layout, (order + 1) * (order + 1)) >= 0)
+        return AV_CHANNEL_ORDER_AMBISONIC;
+
+    return AV_CHANNEL_ORDER_CUSTOM;
+}
+
+/**
+ * If the custom layout is n-th order standard-order ambisonic, with optional
+ * extra non-diegetic channels at the end, write its string description in bp.
+ * Return a negative error code otherwise.
+ */
+static int try_describe_ambisonic(AVBPrint *bp, const AVChannelLayout *channel_layout)
+{
+    int nb_ambi_channels;
+    int order = av_channel_layout_ambisonic_order(channel_layout);
+    if (order < 0)
+        return order;
+
+    av_bprintf(bp, "ambisonic %d", order);
+
+    /* extra channels present */
+    nb_ambi_channels = (order + 1) * (order + 1);
+    if (nb_ambi_channels < channel_layout->nb_channels) {
+        AVChannelLayout extra = { 0 };
+
+        if (channel_layout->order == AV_CHANNEL_ORDER_AMBISONIC) {
+            extra.order       = AV_CHANNEL_ORDER_NATIVE;
+            extra.nb_channels = av_popcount64(channel_layout->u.mask);
+            extra.u.mask      = channel_layout->u.mask;
+        } else {
+            int64_t mask;
+            if (!has_channel_names(channel_layout) &&
+                (mask = masked_description(channel_layout, nb_ambi_channels)) > 0) {
+                extra.order       = AV_CHANNEL_ORDER_NATIVE;
+                extra.nb_channels = av_popcount64(mask);
+                extra.u.mask      = mask;
+            } else {
+                extra.order       = AV_CHANNEL_ORDER_CUSTOM;
+                extra.nb_channels = channel_layout->nb_channels - nb_ambi_channels;
+                extra.u.map       = channel_layout->u.map + nb_ambi_channels;
+            }
+        }
+
+        av_bprint_chars(bp, '+', 1);
+        av_channel_layout_describe_bprint(&extra, bp);
+        /* Not calling uninit here on extra because we don't own the u.map pointer */
+    }
+
+    return 0;
+}
+
+int av_channel_layout_describe_bprint(const AVChannelLayout *channel_layout,
+                                      AVBPrint *bp)
+{
+    int i;
+
+    switch (channel_layout->order) {
+    case AV_CHANNEL_ORDER_NATIVE:
+        for (i = 0; i < FF_ARRAY_ELEMS(channel_layout_map); i++)
+            if (channel_layout->u.mask == channel_layout_map[i].layout.u.mask) {
+                av_bprintf(bp, "%s", channel_layout_map[i].name);
+                return 0;
+            }
+        // fall-through
+    case AV_CHANNEL_ORDER_CUSTOM:
+        if (channel_layout->order == AV_CHANNEL_ORDER_CUSTOM) {
+            int64_t mask;
+            int res = try_describe_ambisonic(bp, channel_layout);
+            if (res >= 0)
+                return 0;
+            if (!has_channel_names(channel_layout) &&
+                (mask = masked_description(channel_layout, 0)) > 0) {
+                AVChannelLayout native = { .order       = AV_CHANNEL_ORDER_NATIVE,
+                                           .nb_channels = av_popcount64(mask),
+                                           .u.mask      = mask };
+                return av_channel_layout_describe_bprint(&native, bp);
+            }
+        }
+        if (channel_layout->nb_channels)
+            av_bprintf(bp, "%d channels (", channel_layout->nb_channels);
+        for (i = 0; i < channel_layout->nb_channels; i++) {
+            enum AVChannel ch = av_channel_layout_channel_from_index(channel_layout, i);
+
+            if (i)
+                av_bprintf(bp, "+");
+            av_channel_name_bprint(bp, ch);
+            if (channel_layout->order == AV_CHANNEL_ORDER_CUSTOM &&
+                channel_layout->u.map[i].name[0])
+                av_bprintf(bp, "@%s", channel_layout->u.map[i].name);
+        }
+        if (channel_layout->nb_channels) {
+            av_bprintf(bp, ")");
+            return 0;
+        }
+        // fall-through
+    case AV_CHANNEL_ORDER_UNSPEC:
+        av_bprintf(bp, "%d channels", channel_layout->nb_channels);
+        return 0;
+    case AV_CHANNEL_ORDER_AMBISONIC:
+        return try_describe_ambisonic(bp, channel_layout);
+    default:
+        return AVERROR(EINVAL);
+    }
+}
+
+int av_channel_layout_describe(const AVChannelLayout *channel_layout,
+                               char *buf, size_t buf_size)
+{
+    AVBPrint bp;
+    int ret;
+
+    if (!buf && buf_size)
+        return AVERROR(EINVAL);
+
+    av_bprint_init_for_buffer(&bp, buf, buf_size);
+    ret = av_channel_layout_describe_bprint(channel_layout, &bp);
+    if (ret < 0)
+        return ret;
+
+    if (bp.len >= INT_MAX)
+        return AVERROR(ERANGE);
+    return bp.len + 1;
+}
+
+enum AVChannel
+av_channel_layout_channel_from_index(const AVChannelLayout *channel_layout,
+                                     unsigned int idx)
+{
+    int i;
+
+    if (idx >= channel_layout->nb_channels)
+        return AV_CHAN_NONE;
+
+    switch (channel_layout->order) {
+    case AV_CHANNEL_ORDER_CUSTOM:
+        return channel_layout->u.map[idx].id;
+    case AV_CHANNEL_ORDER_AMBISONIC: {
+        int ambi_channels = channel_layout->nb_channels - av_popcount64(channel_layout->u.mask);
+        if (idx < ambi_channels)
+            return AV_CHAN_AMBISONIC_BASE + idx;
+        idx -= ambi_channels;
+        }
+    // fall-through
+    case AV_CHANNEL_ORDER_NATIVE:
+        for (i = 0; i < 64; i++) {
+            if ((1ULL << i) & channel_layout->u.mask && !idx--)
+                return i;
+        }
+    default:
+        return AV_CHAN_NONE;
+    }
+}
+
+enum AVChannel
+av_channel_layout_channel_from_string(const AVChannelLayout *channel_layout,
+                                      const char *str)
+{
+    int index = av_channel_layout_index_from_string(channel_layout, str);
+
+    if (index < 0)
+        return AV_CHAN_NONE;
+
+    return av_channel_layout_channel_from_index(channel_layout, index);
+}
+
+int av_channel_layout_index_from_channel(const AVChannelLayout *channel_layout,
+                                         enum AVChannel channel)
+{
+    int i;
+
+    if (channel == AV_CHAN_NONE)
+        return AVERROR(EINVAL);
+
+    switch (channel_layout->order) {
+    case AV_CHANNEL_ORDER_CUSTOM:
+        for (i = 0; i < channel_layout->nb_channels; i++)
+            if (channel_layout->u.map[i].id == channel)
+                return i;
+        return AVERROR(EINVAL);
+    case AV_CHANNEL_ORDER_AMBISONIC:
+    case AV_CHANNEL_ORDER_NATIVE: {
+        uint64_t mask = channel_layout->u.mask;
+        int ambi_channels = channel_layout->nb_channels - av_popcount64(mask);
+        if (channel_layout->order == AV_CHANNEL_ORDER_AMBISONIC &&
+            channel >= AV_CHAN_AMBISONIC_BASE) {
+            if (channel - AV_CHAN_AMBISONIC_BASE >= ambi_channels)
+                return AVERROR(EINVAL);
+            return channel - AV_CHAN_AMBISONIC_BASE;
+        }
+        if ((unsigned)channel > 63 || !(mask & (1ULL << channel)))
+            return AVERROR(EINVAL);
+        mask &= (1ULL << channel) - 1;
+        return av_popcount64(mask) + ambi_channels;
+        }
+    default:
+        return AVERROR(EINVAL);
+    }
+}
+
+int av_channel_layout_index_from_string(const AVChannelLayout *channel_layout,
+                                        const char *str)
+{
+    char *chname;
+    enum AVChannel ch = AV_CHAN_NONE;
+
+    switch (channel_layout->order) {
+    case AV_CHANNEL_ORDER_CUSTOM:
+        chname = strstr(str, "@");
+        if (chname) {
+            char buf[16];
+            chname++;
+            av_strlcpy(buf, str, FFMIN(sizeof(buf), chname - str));
+            if (!*chname)
+                chname = NULL;
+            ch = av_channel_from_string(buf);
+            if (ch == AV_CHAN_NONE && *buf)
+                return AVERROR(EINVAL);
+        }
+        for (int i = 0; chname && i < channel_layout->nb_channels; i++) {
+            if (!strcmp(chname, channel_layout->u.map[i].name) &&
+                (ch == AV_CHAN_NONE || ch == channel_layout->u.map[i].id))
+                return i;
+        }
+        // fall-through
+    case AV_CHANNEL_ORDER_AMBISONIC:
+    case AV_CHANNEL_ORDER_NATIVE:
+        ch = av_channel_from_string(str);
+        if (ch == AV_CHAN_NONE)
+            return AVERROR(EINVAL);
+        return av_channel_layout_index_from_channel(channel_layout, ch);
+    }
+
+    return AVERROR(EINVAL);
+}
+
+int av_channel_layout_check(const AVChannelLayout *channel_layout)
+{
+    if (channel_layout->nb_channels <= 0)
+        return 0;
+
+    switch (channel_layout->order) {
+    case AV_CHANNEL_ORDER_NATIVE:
+        return av_popcount64(channel_layout->u.mask) == channel_layout->nb_channels;
+    case AV_CHANNEL_ORDER_CUSTOM:
+        if (!channel_layout->u.map)
+            return 0;
+        for (int i = 0; i < channel_layout->nb_channels; i++) {
+            if (channel_layout->u.map[i].id == AV_CHAN_NONE)
+                return 0;
+        }
+        return 1;
+    case AV_CHANNEL_ORDER_AMBISONIC:
+        /* If non-diegetic channels are present, ensure they are taken into account */
+        return av_popcount64(channel_layout->u.mask) < channel_layout->nb_channels;
+    case AV_CHANNEL_ORDER_UNSPEC:
+        return 1;
+    default:
+        return 0;
+    }
+}
+
+int av_channel_layout_compare(const AVChannelLayout *chl, const AVChannelLayout *chl1)
+{
+    int i;
+
+    /* different channel counts -> not equal */
+    if (chl->nb_channels != chl1->nb_channels)
+        return 1;
+
+    /* if only one is unspecified -> not equal */
+    if ((chl->order  == AV_CHANNEL_ORDER_UNSPEC) !=
+        (chl1->order == AV_CHANNEL_ORDER_UNSPEC))
+        return 1;
+    /* both are unspecified -> equal */
+    else if (chl->order == AV_CHANNEL_ORDER_UNSPEC)
+        return 0;
+
+    /* can compare masks directly */
+    if ((chl->order == AV_CHANNEL_ORDER_NATIVE ||
+         chl->order == AV_CHANNEL_ORDER_AMBISONIC) &&
+        chl->order == chl1->order)
+        return chl->u.mask != chl1->u.mask;
+
+    /* compare channel by channel */
+    for (i = 0; i < chl->nb_channels; i++)
+        if (av_channel_layout_channel_from_index(chl,  i) !=
+            av_channel_layout_channel_from_index(chl1, i))
+            return 1;
+    return 0;
+}
+
+void av_channel_layout_default(AVChannelLayout *ch_layout, int nb_channels)
+{
+    int i;
+    for (i = 0; i < FF_ARRAY_ELEMS(channel_layout_map); i++)
+        if (nb_channels == channel_layout_map[i].layout.nb_channels) {
+            *ch_layout = channel_layout_map[i].layout;
+            return;
+        }
+
+    ch_layout->order       = AV_CHANNEL_ORDER_UNSPEC;
+    ch_layout->nb_channels = nb_channels;
+}
+
+const AVChannelLayout *av_channel_layout_standard(void **opaque)
+{
+    uintptr_t i = (uintptr_t)*opaque;
+    const AVChannelLayout *ch_layout = NULL;
+
+    if (i < FF_ARRAY_ELEMS(channel_layout_map)) {
+        ch_layout = &channel_layout_map[i].layout;
+        *opaque = (void*)(i + 1);
+    }
+
+    return ch_layout;
+}
+
+uint64_t av_channel_layout_subset(const AVChannelLayout *channel_layout,
+                                  uint64_t mask)
+{
+    uint64_t ret = 0;
+    int i;
+
+    switch (channel_layout->order) {
+    case AV_CHANNEL_ORDER_NATIVE:
+    case AV_CHANNEL_ORDER_AMBISONIC:
+        return channel_layout->u.mask & mask;
+    case AV_CHANNEL_ORDER_CUSTOM:
+        for (i = 0; i < 64; i++)
+            if (mask & (1ULL << i) && av_channel_layout_index_from_channel(channel_layout, i) >= 0)
+                ret |= (1ULL << i);
+        break;
+    }
+
+    return ret;
+}
+
+int av_channel_layout_retype(AVChannelLayout *channel_layout, enum AVChannelOrder order, int flags)
+{
+    int allow_lossy = !(flags & AV_CHANNEL_LAYOUT_RETYPE_FLAG_LOSSLESS);
+    int lossy;
+
+    if (!av_channel_layout_check(channel_layout))
+        return AVERROR(EINVAL);
+
+    if (flags & AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL)
+        order = canonical_order(channel_layout);
+
+    if (channel_layout->order == order)
+        return 0;
+
+    switch (order) {
+    case AV_CHANNEL_ORDER_UNSPEC: {
+        int nb_channels = channel_layout->nb_channels;
+        if (channel_layout->order == AV_CHANNEL_ORDER_CUSTOM) {
+            lossy = 0;
+            for (int i = 0; i < nb_channels; i++) {
+                if (channel_layout->u.map[i].id != AV_CHAN_UNKNOWN || channel_layout->u.map[i].name[0]) {
+                    lossy = 1;
+                    break;
+                }
+            }
+        } else {
+            lossy = 1;
+        }
+        if (!lossy || allow_lossy) {
+            void *opaque = channel_layout->opaque;
+            av_channel_layout_uninit(channel_layout);
+            channel_layout->order       = AV_CHANNEL_ORDER_UNSPEC;
+            channel_layout->nb_channels = nb_channels;
+            channel_layout->opaque      = opaque;
+            return lossy;
+        }
+        return AVERROR(ENOSYS);
+        }
+    case AV_CHANNEL_ORDER_NATIVE:
+        if (channel_layout->order == AV_CHANNEL_ORDER_CUSTOM) {
+            int64_t mask = masked_description(channel_layout, 0);
+            if (mask < 0)
+                return AVERROR(ENOSYS);
+            lossy = has_channel_names(channel_layout);
+            if (!lossy || allow_lossy) {
+                void *opaque = channel_layout->opaque;
+                av_channel_layout_uninit(channel_layout);
+                av_channel_layout_from_mask(channel_layout, mask);
+                channel_layout->opaque = opaque;
+                return lossy;
+            }
+        }
+        return AVERROR(ENOSYS);
+    case AV_CHANNEL_ORDER_CUSTOM: {
+        AVChannelLayout custom = { 0 };
+        int ret = av_channel_layout_custom_init(&custom, channel_layout->nb_channels);
+        void *opaque = channel_layout->opaque;
+        if (ret < 0)
+            return ret;
+        if (channel_layout->order != AV_CHANNEL_ORDER_UNSPEC)
+            for (int i = 0; i < channel_layout->nb_channels; i++)
+                custom.u.map[i].id = av_channel_layout_channel_from_index(channel_layout, i);
+        av_channel_layout_uninit(channel_layout);
+        *channel_layout = custom;
+        channel_layout->opaque = opaque;
+        return 0;
+        }
+    case AV_CHANNEL_ORDER_AMBISONIC:
+        if (channel_layout->order == AV_CHANNEL_ORDER_CUSTOM) {
+            int64_t mask;
+            int nb_channels = channel_layout->nb_channels;
+            int order = av_channel_layout_ambisonic_order(channel_layout);
+            if (order < 0)
+                return AVERROR(ENOSYS);
+            mask = masked_description(channel_layout, (order + 1) * (order + 1));
+            if (mask < 0)
+                return AVERROR(ENOSYS);
+            lossy = has_channel_names(channel_layout);
+            if (!lossy || allow_lossy) {
+                void *opaque = channel_layout->opaque;
+                av_channel_layout_uninit(channel_layout);
+                channel_layout->order       = AV_CHANNEL_ORDER_AMBISONIC;
+                channel_layout->nb_channels = nb_channels;
+                channel_layout->u.mask      = mask;
+                channel_layout->opaque      = opaque;
+                return lossy;
+            }
+        }
+        return AVERROR(ENOSYS);
+    default:
+        return AVERROR(EINVAL);
+    }
+}

ffmpeg/libavutil/channel_layout.h

@@ -0,0 +1,762 @@
+/*
+ * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2008 Peter Ross
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CHANNEL_LAYOUT_H
+#define AVUTIL_CHANNEL_LAYOUT_H
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "version.h"
+#include "attributes.h"
+
+/**
+ * @file
+ * @ingroup lavu_audio_channels
+ * Public libavutil channel layout APIs header.
+ */
+
+
+/**
+ * @defgroup lavu_audio_channels Audio channels
+ * @ingroup lavu_audio
+ *
+ * Audio channel layout utility functions
+ *
+ * @{
+ */
+
+enum AVChannel {
+    /// Invalid channel index
+    AV_CHAN_NONE = -1,
+    AV_CHAN_FRONT_LEFT,
+    AV_CHAN_FRONT_RIGHT,
+    AV_CHAN_FRONT_CENTER,
+    AV_CHAN_LOW_FREQUENCY,
+    AV_CHAN_BACK_LEFT,
+    AV_CHAN_BACK_RIGHT,
+    AV_CHAN_FRONT_LEFT_OF_CENTER,
+    AV_CHAN_FRONT_RIGHT_OF_CENTER,
+    AV_CHAN_BACK_CENTER,
+    AV_CHAN_SIDE_LEFT,
+    AV_CHAN_SIDE_RIGHT,
+    AV_CHAN_TOP_CENTER,
+    AV_CHAN_TOP_FRONT_LEFT,
+    AV_CHAN_TOP_FRONT_CENTER,
+    AV_CHAN_TOP_FRONT_RIGHT,
+    AV_CHAN_TOP_BACK_LEFT,
+    AV_CHAN_TOP_BACK_CENTER,
+    AV_CHAN_TOP_BACK_RIGHT,
+    /** Stereo downmix. */
+    AV_CHAN_STEREO_LEFT = 29,
+    /** See above. */
+    AV_CHAN_STEREO_RIGHT,
+    AV_CHAN_WIDE_LEFT,
+    AV_CHAN_WIDE_RIGHT,
+    AV_CHAN_SURROUND_DIRECT_LEFT,
+    AV_CHAN_SURROUND_DIRECT_RIGHT,
+    AV_CHAN_LOW_FREQUENCY_2,
+    AV_CHAN_TOP_SIDE_LEFT,
+    AV_CHAN_TOP_SIDE_RIGHT,
+    AV_CHAN_BOTTOM_FRONT_CENTER,
+    AV_CHAN_BOTTOM_FRONT_LEFT,
+    AV_CHAN_BOTTOM_FRONT_RIGHT,
+    AV_CHAN_SIDE_SURROUND_LEFT,     ///<  +90 degrees, Lss, SiL
+    AV_CHAN_SIDE_SURROUND_RIGHT,    ///<  -90 degrees, Rss, SiR
+    AV_CHAN_TOP_SURROUND_LEFT,      ///< +110 degrees, Lvs, TpLS
+    AV_CHAN_TOP_SURROUND_RIGHT,     ///< -110 degrees, Rvs, TpRS
+
+    AV_CHAN_BINAURAL_LEFT = 61,
+    AV_CHAN_BINAURAL_RIGHT,
+
+    /** Channel is empty can be safely skipped. */
+    AV_CHAN_UNUSED = 0x200,
+
+    /** Channel contains data, but its position is unknown. */
+    AV_CHAN_UNKNOWN = 0x300,
+
+    /**
+     * Range of channels between AV_CHAN_AMBISONIC_BASE and
+     * AV_CHAN_AMBISONIC_END represent Ambisonic components using the ACN system.
+     *
+     * Given a channel id `<i>` between AV_CHAN_AMBISONIC_BASE and
+     * AV_CHAN_AMBISONIC_END (inclusive), the ACN index of the channel `<n>` is
+     * `<n> = <i> - AV_CHAN_AMBISONIC_BASE`.
+     *
+     * @note these values are only used for AV_CHANNEL_ORDER_CUSTOM channel
+     * orderings, the AV_CHANNEL_ORDER_AMBISONIC ordering orders the channels
+     * implicitly by their position in the stream.
+     */
+    AV_CHAN_AMBISONIC_BASE = 0x400,
+    // leave space for 1024 ids, which correspond to maximum order-32 harmonics,
+    // which should be enough for the foreseeable use cases
+    AV_CHAN_AMBISONIC_END  = 0x7ff,
+};
+
+enum AVChannelOrder {
+    /**
+     * Only the channel count is specified, without any further information
+     * about the channel order.
+     */
+    AV_CHANNEL_ORDER_UNSPEC,
+    /**
+     * The native channel order, i.e. the channels are in the same order in
+     * which they are defined in the AVChannel enum. This supports up to 63
+     * different channels.
+     */
+    AV_CHANNEL_ORDER_NATIVE,
+    /**
+     * The channel order does not correspond to any other predefined order and
+     * is stored as an explicit map. For example, this could be used to support
+     * layouts with 64 or more channels, or with empty/skipped (AV_CHAN_UNUSED)
+     * channels at arbitrary positions.
+     */
+    AV_CHANNEL_ORDER_CUSTOM,
+    /**
+     * The audio is represented as the decomposition of the sound field into
+     * spherical harmonics. Each channel corresponds to a single expansion
+     * component. Channels are ordered according to ACN (Ambisonic Channel
+     * Number).
+     *
+     * The channel with the index n in the stream contains the spherical
+     * harmonic of degree l and order m given by
+     * @code{.unparsed}
+     *   l   = floor(sqrt(n)),
+     *   m   = n - l * (l + 1).
+     * @endcode
+     *
+     * Conversely given a spherical harmonic of degree l and order m, the
+     * corresponding channel index n is given by
+     * @code{.unparsed}
+     *   n = l * (l + 1) + m.
+     * @endcode
+     *
+     * Normalization is assumed to be SN3D (Schmidt Semi-Normalization)
+     * as defined in AmbiX format $ 2.1.
+     */
+    AV_CHANNEL_ORDER_AMBISONIC,
+    /**
+     * Number of channel orders, not part of ABI/API
+     */
+    FF_CHANNEL_ORDER_NB
+};
+
+
+/**
+ * @defgroup channel_masks Audio channel masks
+ *
+ * A channel layout is a 64-bits integer with a bit set for every channel.
+ * The number of bits set must be equal to the number of channels.
+ * The value 0 means that the channel layout is not known.
+ * @note this data structure is not powerful enough to handle channels
+ * combinations that have the same channel multiple times, such as
+ * dual-mono.
+ *
+ * @{
+ */
+#define AV_CH_FRONT_LEFT             (1ULL << AV_CHAN_FRONT_LEFT           )
+#define AV_CH_FRONT_RIGHT            (1ULL << AV_CHAN_FRONT_RIGHT          )
+#define AV_CH_FRONT_CENTER           (1ULL << AV_CHAN_FRONT_CENTER         )
+#define AV_CH_LOW_FREQUENCY          (1ULL << AV_CHAN_LOW_FREQUENCY        )
+#define AV_CH_BACK_LEFT              (1ULL << AV_CHAN_BACK_LEFT            )
+#define AV_CH_BACK_RIGHT             (1ULL << AV_CHAN_BACK_RIGHT           )
+#define AV_CH_FRONT_LEFT_OF_CENTER   (1ULL << AV_CHAN_FRONT_LEFT_OF_CENTER )
+#define AV_CH_FRONT_RIGHT_OF_CENTER  (1ULL << AV_CHAN_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_BACK_CENTER            (1ULL << AV_CHAN_BACK_CENTER          )
+#define AV_CH_SIDE_LEFT              (1ULL << AV_CHAN_SIDE_LEFT            )
+#define AV_CH_SIDE_RIGHT             (1ULL << AV_CHAN_SIDE_RIGHT           )
+#define AV_CH_TOP_CENTER             (1ULL << AV_CHAN_TOP_CENTER           )
+#define AV_CH_TOP_FRONT_LEFT         (1ULL << AV_CHAN_TOP_FRONT_LEFT       )
+#define AV_CH_TOP_FRONT_CENTER       (1ULL << AV_CHAN_TOP_FRONT_CENTER     )
+#define AV_CH_TOP_FRONT_RIGHT        (1ULL << AV_CHAN_TOP_FRONT_RIGHT      )
+#define AV_CH_TOP_BACK_LEFT          (1ULL << AV_CHAN_TOP_BACK_LEFT        )
+#define AV_CH_TOP_BACK_CENTER        (1ULL << AV_CHAN_TOP_BACK_CENTER      )
+#define AV_CH_TOP_BACK_RIGHT         (1ULL << AV_CHAN_TOP_BACK_RIGHT       )
+#define AV_CH_STEREO_LEFT            (1ULL << AV_CHAN_STEREO_LEFT          )
+#define AV_CH_STEREO_RIGHT           (1ULL << AV_CHAN_STEREO_RIGHT         )
+#define AV_CH_WIDE_LEFT              (1ULL << AV_CHAN_WIDE_LEFT            )
+#define AV_CH_WIDE_RIGHT             (1ULL << AV_CHAN_WIDE_RIGHT           )
+#define AV_CH_SURROUND_DIRECT_LEFT   (1ULL << AV_CHAN_SURROUND_DIRECT_LEFT )
+#define AV_CH_SURROUND_DIRECT_RIGHT  (1ULL << AV_CHAN_SURROUND_DIRECT_RIGHT)
+#define AV_CH_LOW_FREQUENCY_2        (1ULL << AV_CHAN_LOW_FREQUENCY_2      )
+#define AV_CH_TOP_SIDE_LEFT          (1ULL << AV_CHAN_TOP_SIDE_LEFT        )
+#define AV_CH_TOP_SIDE_RIGHT         (1ULL << AV_CHAN_TOP_SIDE_RIGHT       )
+#define AV_CH_BOTTOM_FRONT_CENTER    (1ULL << AV_CHAN_BOTTOM_FRONT_CENTER  )
+#define AV_CH_BOTTOM_FRONT_LEFT      (1ULL << AV_CHAN_BOTTOM_FRONT_LEFT    )
+#define AV_CH_BOTTOM_FRONT_RIGHT     (1ULL << AV_CHAN_BOTTOM_FRONT_RIGHT   )
+#define AV_CH_SIDE_SURROUND_LEFT     (1ULL << AV_CHAN_SIDE_SURROUND_LEFT   )
+#define AV_CH_SIDE_SURROUND_RIGHT    (1ULL << AV_CHAN_SIDE_SURROUND_RIGHT  )
+#define AV_CH_TOP_SURROUND_LEFT      (1ULL << AV_CHAN_TOP_SURROUND_LEFT    )
+#define AV_CH_TOP_SURROUND_RIGHT     (1ULL << AV_CHAN_TOP_SURROUND_RIGHT   )
+#define AV_CH_BINAURAL_LEFT          (1ULL << AV_CHAN_BINAURAL_LEFT        )
+#define AV_CH_BINAURAL_RIGHT         (1ULL << AV_CHAN_BINAURAL_RIGHT       )
+
+/**
+ * @}
+ * @defgroup channel_mask_c Audio channel layouts
+ * @{
+ * */
+#define AV_CH_LAYOUT_MONO              (AV_CH_FRONT_CENTER)
+#define AV_CH_LAYOUT_STEREO            (AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT)
+#define AV_CH_LAYOUT_2POINT1           (AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_2_1               (AV_CH_LAYOUT_STEREO|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_SURROUND          (AV_CH_LAYOUT_STEREO|AV_CH_FRONT_CENTER)
+#define AV_CH_LAYOUT_3POINT1           (AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_4POINT0           (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_4POINT1           (AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_2_2               (AV_CH_LAYOUT_STEREO|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
+#define AV_CH_LAYOUT_QUAD              (AV_CH_LAYOUT_STEREO|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT0           (AV_CH_LAYOUT_SURROUND|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
+#define AV_CH_LAYOUT_5POINT1           (AV_CH_LAYOUT_5POINT0|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_5POINT0_BACK      (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT1_BACK      (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_6POINT0           (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT0_FRONT     (AV_CH_LAYOUT_2_2|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_HEXAGONAL         (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_3POINT1POINT2     (AV_CH_LAYOUT_3POINT1|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_6POINT1           (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT1_BACK      (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT1_FRONT     (AV_CH_LAYOUT_6POINT0_FRONT|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_7POINT0           (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT0_FRONT     (AV_CH_LAYOUT_5POINT0|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_7POINT1           (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT1_WIDE      (AV_CH_LAYOUT_5POINT1|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_7POINT1_WIDE_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_5POINT1POINT2     (AV_CH_LAYOUT_5POINT1|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_5POINT1POINT2_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_OCTAGONAL         (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_CENTER|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_CUBE              (AV_CH_LAYOUT_QUAD|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT1POINT4_BACK (AV_CH_LAYOUT_5POINT1POINT2|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT1POINT2     (AV_CH_LAYOUT_7POINT1|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_7POINT1POINT4_BACK (AV_CH_LAYOUT_7POINT1POINT2|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT2POINT3     (AV_CH_LAYOUT_7POINT1POINT2|AV_CH_TOP_BACK_CENTER|AV_CH_LOW_FREQUENCY_2)
+#define AV_CH_LAYOUT_9POINT1POINT4_BACK (AV_CH_LAYOUT_7POINT1POINT4_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_9POINT1POINT6     (AV_CH_LAYOUT_9POINT1POINT4_BACK|AV_CH_TOP_SIDE_LEFT|AV_CH_TOP_SIDE_RIGHT)
+#define AV_CH_LAYOUT_HEXADECAGONAL     (AV_CH_LAYOUT_OCTAGONAL|AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT|AV_CH_TOP_BACK_CENTER|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_BINAURAL          (AV_CH_BINAURAL_LEFT|AV_CH_BINAURAL_RIGHT)
+#define AV_CH_LAYOUT_STEREO_DOWNMIX    (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
+#define AV_CH_LAYOUT_22POINT2          (AV_CH_LAYOUT_9POINT1POINT6|AV_CH_BACK_CENTER|AV_CH_LOW_FREQUENCY_2|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_CENTER|AV_CH_TOP_BACK_CENTER|AV_CH_BOTTOM_FRONT_CENTER|AV_CH_BOTTOM_FRONT_LEFT|AV_CH_BOTTOM_FRONT_RIGHT)
+
+#define AV_CH_LAYOUT_7POINT1_TOP_BACK AV_CH_LAYOUT_5POINT1POINT2_BACK
+
+enum AVMatrixEncoding {
+    AV_MATRIX_ENCODING_NONE,
+    AV_MATRIX_ENCODING_DOLBY,
+    AV_MATRIX_ENCODING_DPLII,
+    AV_MATRIX_ENCODING_DPLIIX,
+    AV_MATRIX_ENCODING_DPLIIZ,
+    AV_MATRIX_ENCODING_DOLBYEX,
+    AV_MATRIX_ENCODING_DOLBYHEADPHONE,
+    AV_MATRIX_ENCODING_NB
+};
+
+/**
+ * @}
+ */
+
+/**
+ * An AVChannelCustom defines a single channel within a custom order layout
+ *
+ * Unlike most structures in FFmpeg, sizeof(AVChannelCustom) is a part of the
+ * public ABI.
+ *
+ * No new fields may be added to it without a major version bump.
+ */
+typedef struct AVChannelCustom {
+    enum AVChannel id;
+    char name[16];
+    void *opaque;
+} AVChannelCustom;
+
+/**
+ * An AVChannelLayout holds information about the channel layout of audio data.
+ *
+ * A channel layout here is defined as a set of channels ordered in a specific
+ * way (unless the channel order is AV_CHANNEL_ORDER_UNSPEC, in which case an
+ * AVChannelLayout carries only the channel count).
+ * All orders may be treated as if they were AV_CHANNEL_ORDER_UNSPEC by
+ * ignoring everything but the channel count, as long as av_channel_layout_check()
+ * considers they are valid.
+ *
+ * Unlike most structures in FFmpeg, sizeof(AVChannelLayout) is a part of the
+ * public ABI and may be used by the caller. E.g. it may be allocated on stack
+ * or embedded in caller-defined structs.
+ *
+ * AVChannelLayout can be initialized as follows:
+ * - default initialization with {0}, followed by setting all used fields
+ *   correctly;
+ * - by assigning one of the predefined AV_CHANNEL_LAYOUT_* initializers;
+ * - with a constructor function, such as av_channel_layout_default(),
+ *   av_channel_layout_from_mask() or av_channel_layout_from_string().
+ *
+ * The channel layout must be uninitialized with av_channel_layout_uninit()
+ *
+ * Copying an AVChannelLayout via assigning is forbidden,
+ * av_channel_layout_copy() must be used instead (and its return value should
+ * be checked)
+ *
+ * No new fields may be added to it without a major version bump, except for
+ * new elements of the union fitting in sizeof(uint64_t).
+ */
+typedef struct AVChannelLayout {
+    /**
+     * Channel order used in this layout.
+     * This is a mandatory field.
+     */
+    enum AVChannelOrder order;
+
+    /**
+     * Number of channels in this layout. Mandatory field.
+     */
+    int nb_channels;
+
+    /**
+     * Details about which channels are present in this layout.
+     * For AV_CHANNEL_ORDER_UNSPEC, this field is undefined and must not be
+     * used.
+     */
+    union {
+        /**
+         * This member must be used for AV_CHANNEL_ORDER_NATIVE, and may be used
+         * for AV_CHANNEL_ORDER_AMBISONIC to signal non-diegetic channels.
+         * It is a bitmask, where the position of each set bit means that the
+         * AVChannel with the corresponding value is present.
+         *
+         * I.e. when (mask & (1 << AV_CHAN_FOO)) is non-zero, then AV_CHAN_FOO
+         * is present in the layout. Otherwise it is not present.
+         *
+         * @note when a channel layout using a bitmask is constructed or
+         * modified manually (i.e.  not using any of the av_channel_layout_*
+         * functions), the code doing it must ensure that the number of set bits
+         * is equal to nb_channels.
+         */
+        uint64_t mask;
+        /**
+         * This member must be used when the channel order is
+         * AV_CHANNEL_ORDER_CUSTOM. It is a nb_channels-sized array, with each
+         * element signalling the presence of the AVChannel with the
+         * corresponding value in map[i].id.
+         *
+         * I.e. when map[i].id is equal to AV_CHAN_FOO, then AV_CH_FOO is the
+         * i-th channel in the audio data.
+         *
+         * When map[i].id is in the range between AV_CHAN_AMBISONIC_BASE and
+         * AV_CHAN_AMBISONIC_END (inclusive), the channel contains an ambisonic
+         * component with ACN index (as defined above)
+         * n = map[i].id - AV_CHAN_AMBISONIC_BASE.
+         *
+         * map[i].name may be filled with a 0-terminated string, in which case
+         * it will be used for the purpose of identifying the channel with the
+         * convenience functions below. Otherwise it must be zeroed.
+         */
+        AVChannelCustom *map;
+    } u;
+
+    /**
+     * For some private data of the user.
+     */
+    void *opaque;
+} AVChannelLayout;
+
+/**
+ * Macro to define native channel layouts
+ *
+ * @note This doesn't use designated initializers for compatibility with C++ 17 and older.
+ */
+#define AV_CHANNEL_LAYOUT_MASK(nb, m) \
+    { /* .order */ AV_CHANNEL_ORDER_NATIVE, \
+      /* .nb_channels */  (nb), \
+      /* .u.mask */ { m }, \
+      /* .opaque */ NULL }
+
+/**
+ * @name Common pre-defined channel layouts
+ * @{
+ */
+#define AV_CHANNEL_LAYOUT_MONO              AV_CHANNEL_LAYOUT_MASK(1,  AV_CH_LAYOUT_MONO)
+#define AV_CHANNEL_LAYOUT_STEREO            AV_CHANNEL_LAYOUT_MASK(2,  AV_CH_LAYOUT_STEREO)
+#define AV_CHANNEL_LAYOUT_2POINT1           AV_CHANNEL_LAYOUT_MASK(3,  AV_CH_LAYOUT_2POINT1)
+#define AV_CHANNEL_LAYOUT_2_1               AV_CHANNEL_LAYOUT_MASK(3,  AV_CH_LAYOUT_2_1)
+#define AV_CHANNEL_LAYOUT_SURROUND          AV_CHANNEL_LAYOUT_MASK(3,  AV_CH_LAYOUT_SURROUND)
+#define AV_CHANNEL_LAYOUT_3POINT1           AV_CHANNEL_LAYOUT_MASK(4,  AV_CH_LAYOUT_3POINT1)
+#define AV_CHANNEL_LAYOUT_4POINT0           AV_CHANNEL_LAYOUT_MASK(4,  AV_CH_LAYOUT_4POINT0)
+#define AV_CHANNEL_LAYOUT_4POINT1           AV_CHANNEL_LAYOUT_MASK(5,  AV_CH_LAYOUT_4POINT1)
+#define AV_CHANNEL_LAYOUT_2_2               AV_CHANNEL_LAYOUT_MASK(4,  AV_CH_LAYOUT_2_2)
+#define AV_CHANNEL_LAYOUT_QUAD              AV_CHANNEL_LAYOUT_MASK(4,  AV_CH_LAYOUT_QUAD)
+#define AV_CHANNEL_LAYOUT_5POINT0           AV_CHANNEL_LAYOUT_MASK(5,  AV_CH_LAYOUT_5POINT0)
+#define AV_CHANNEL_LAYOUT_5POINT1           AV_CHANNEL_LAYOUT_MASK(6,  AV_CH_LAYOUT_5POINT1)
+#define AV_CHANNEL_LAYOUT_5POINT0_BACK      AV_CHANNEL_LAYOUT_MASK(5,  AV_CH_LAYOUT_5POINT0_BACK)
+#define AV_CHANNEL_LAYOUT_5POINT1_BACK      AV_CHANNEL_LAYOUT_MASK(6,  AV_CH_LAYOUT_5POINT1_BACK)
+#define AV_CHANNEL_LAYOUT_6POINT0           AV_CHANNEL_LAYOUT_MASK(6,  AV_CH_LAYOUT_6POINT0)
+#define AV_CHANNEL_LAYOUT_6POINT0_FRONT     AV_CHANNEL_LAYOUT_MASK(6,  AV_CH_LAYOUT_6POINT0_FRONT)
+#define AV_CHANNEL_LAYOUT_3POINT1POINT2     AV_CHANNEL_LAYOUT_MASK(6,  AV_CH_LAYOUT_3POINT1POINT2)
+#define AV_CHANNEL_LAYOUT_HEXAGONAL         AV_CHANNEL_LAYOUT_MASK(6,  AV_CH_LAYOUT_HEXAGONAL)
+#define AV_CHANNEL_LAYOUT_6POINT1           AV_CHANNEL_LAYOUT_MASK(7,  AV_CH_LAYOUT_6POINT1)
+#define AV_CHANNEL_LAYOUT_6POINT1_BACK      AV_CHANNEL_LAYOUT_MASK(7,  AV_CH_LAYOUT_6POINT1_BACK)
+#define AV_CHANNEL_LAYOUT_6POINT1_FRONT     AV_CHANNEL_LAYOUT_MASK(7,  AV_CH_LAYOUT_6POINT1_FRONT)
+#define AV_CHANNEL_LAYOUT_7POINT0           AV_CHANNEL_LAYOUT_MASK(7,  AV_CH_LAYOUT_7POINT0)
+#define AV_CHANNEL_LAYOUT_7POINT0_FRONT     AV_CHANNEL_LAYOUT_MASK(7,  AV_CH_LAYOUT_7POINT0_FRONT)
+#define AV_CHANNEL_LAYOUT_7POINT1           AV_CHANNEL_LAYOUT_MASK(8,  AV_CH_LAYOUT_7POINT1)
+#define AV_CHANNEL_LAYOUT_7POINT1_WIDE      AV_CHANNEL_LAYOUT_MASK(8,  AV_CH_LAYOUT_7POINT1_WIDE)
+#define AV_CHANNEL_LAYOUT_7POINT1_WIDE_BACK AV_CHANNEL_LAYOUT_MASK(8,  AV_CH_LAYOUT_7POINT1_WIDE_BACK)
+#define AV_CHANNEL_LAYOUT_5POINT1POINT2     AV_CHANNEL_LAYOUT_MASK(8,  AV_CH_LAYOUT_5POINT1POINT2)
+#define AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_5POINT1POINT2_BACK)
+#define AV_CHANNEL_LAYOUT_OCTAGONAL         AV_CHANNEL_LAYOUT_MASK(8,  AV_CH_LAYOUT_OCTAGONAL)
+#define AV_CHANNEL_LAYOUT_CUBE              AV_CHANNEL_LAYOUT_MASK(8,  AV_CH_LAYOUT_CUBE)
+#define AV_CHANNEL_LAYOUT_5POINT1POINT4_BACK AV_CHANNEL_LAYOUT_MASK(10, AV_CH_LAYOUT_5POINT1POINT4_BACK)
+#define AV_CHANNEL_LAYOUT_7POINT1POINT2     AV_CHANNEL_LAYOUT_MASK(10, AV_CH_LAYOUT_7POINT1POINT2)
+#define AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK AV_CHANNEL_LAYOUT_MASK(12, AV_CH_LAYOUT_7POINT1POINT4_BACK)
+#define AV_CHANNEL_LAYOUT_7POINT2POINT3     AV_CHANNEL_LAYOUT_MASK(12, AV_CH_LAYOUT_7POINT2POINT3)
+#define AV_CHANNEL_LAYOUT_9POINT1POINT4_BACK AV_CHANNEL_LAYOUT_MASK(14, AV_CH_LAYOUT_9POINT1POINT4_BACK)
+#define AV_CHANNEL_LAYOUT_9POINT1POINT6     AV_CHANNEL_LAYOUT_MASK(16, AV_CH_LAYOUT_9POINT1POINT6)
+#define AV_CHANNEL_LAYOUT_HEXADECAGONAL     AV_CHANNEL_LAYOUT_MASK(16, AV_CH_LAYOUT_HEXADECAGONAL)
+#define AV_CHANNEL_LAYOUT_BINAURAL          AV_CHANNEL_LAYOUT_MASK(2,  AV_CH_LAYOUT_BINAURAL)
+#define AV_CHANNEL_LAYOUT_STEREO_DOWNMIX    AV_CHANNEL_LAYOUT_MASK(2,  AV_CH_LAYOUT_STEREO_DOWNMIX)
+#define AV_CHANNEL_LAYOUT_22POINT2          AV_CHANNEL_LAYOUT_MASK(24, AV_CH_LAYOUT_22POINT2)
+
+#define AV_CHANNEL_LAYOUT_7POINT1_TOP_BACK  AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK
+
+#define AV_CHANNEL_LAYOUT_AMBISONIC_FIRST_ORDER \
+    { /* .order */ AV_CHANNEL_ORDER_AMBISONIC, \
+      /* .nb_channels */ 4, \
+      /* .u.mask */ { 0 }, \
+      /* .opaque */ NULL }
+/** @} */
+
+struct AVBPrint;
+
+/**
+ * Get a human readable string in an abbreviated form describing a given channel.
+ * This is the inverse function of @ref av_channel_from_string().
+ *
+ * @param buf pre-allocated buffer where to put the generated string
+ * @param buf_size size in bytes of the buffer.
+ * @param channel the AVChannel whose name to get
+ * @return amount of bytes needed to hold the output string, or a negative AVERROR
+ *         on failure. If the returned value is bigger than buf_size, then the
+ *         string was truncated.
+ */
+int av_channel_name(char *buf, size_t buf_size, enum AVChannel channel);
+
+/**
+ * bprint variant of av_channel_name().
+ *
+ * @note the string will be appended to the bprint buffer.
+ */
+void av_channel_name_bprint(struct AVBPrint *bp, enum AVChannel channel_id);
+
+/**
+ * Get a human readable string describing a given channel.
+ *
+ * @param buf pre-allocated buffer where to put the generated string
+ * @param buf_size size in bytes of the buffer.
+ * @param channel the AVChannel whose description to get
+ * @return amount of bytes needed to hold the output string, or a negative AVERROR
+ *         on failure. If the returned value is bigger than buf_size, then the
+ *         string was truncated.
+ */
+int av_channel_description(char *buf, size_t buf_size, enum AVChannel channel);
+
+/**
+ * bprint variant of av_channel_description().
+ *
+ * @note the string will be appended to the bprint buffer.
+ */
+void av_channel_description_bprint(struct AVBPrint *bp, enum AVChannel channel_id);
+
+/**
+ * This is the inverse function of @ref av_channel_name().
+ *
+ * @return the channel with the given name
+ *         AV_CHAN_NONE when name does not identify a known channel
+ */
+enum AVChannel av_channel_from_string(const char *name);
+
+/**
+ * Initialize a custom channel layout with the specified number of channels.
+ * The channel map will be allocated and the designation of all channels will
+ * be set to AV_CHAN_UNKNOWN.
+ *
+ * This is only a convenience helper function, a custom channel layout can also
+ * be constructed without using this.
+ *
+ * @param channel_layout the layout structure to be initialized
+ * @param nb_channels the number of channels
+ *
+ * @return 0 on success
+ *         AVERROR(EINVAL) if the number of channels <= 0
+ *         AVERROR(ENOMEM) if the channel map could not be allocated
+ */
+int av_channel_layout_custom_init(AVChannelLayout *channel_layout, int nb_channels);
+
+/**
+ * Initialize a native channel layout from a bitmask indicating which channels
+ * are present.
+ *
+ * @param channel_layout the layout structure to be initialized
+ * @param mask bitmask describing the channel layout
+ *
+ * @return 0 on success
+ *         AVERROR(EINVAL) for invalid mask values
+ */
+int av_channel_layout_from_mask(AVChannelLayout *channel_layout, uint64_t mask);
+
+/**
+ * Initialize a channel layout from a given string description.
+ * The input string can be represented by:
+ *  - the formal channel layout name (returned by av_channel_layout_describe())
+ *  - single or multiple channel names (returned by av_channel_name(), eg. "FL",
+ *    or concatenated with "+", each optionally containing a custom name after
+ *    a "@", eg. "FL@Left+FR@Right+LFE")
+ *  - a decimal or hexadecimal value of a native channel layout (eg. "4" or "0x4")
+ *  - the number of channels with default layout (eg. "4c")
+ *  - the number of unordered channels (eg. "4C" or "4 channels")
+ *  - the ambisonic order followed by optional non-diegetic channels (eg.
+ *    "ambisonic 2+stereo")
+ * On error, the channel layout will remain uninitialized, but not necessarily
+ * untouched.
+ *
+ * @param channel_layout uninitialized channel layout for the result
+ * @param str string describing the channel layout
+ * @return 0 on success parsing the channel layout
+ *         AVERROR(EINVAL) if an invalid channel layout string was provided
+ *         AVERROR(ENOMEM) if there was not enough memory
+ */
+int av_channel_layout_from_string(AVChannelLayout *channel_layout,
+                                  const char *str);
+
+/**
+ * Get the default channel layout for a given number of channels.
+ *
+ * @param ch_layout the layout structure to be initialized
+ * @param nb_channels number of channels
+ */
+void av_channel_layout_default(AVChannelLayout *ch_layout, int nb_channels);
+
+/**
+ * Iterate over all standard channel layouts.
+ *
+ * @param opaque a pointer where libavutil will store the iteration state. Must
+ *               point to NULL to start the iteration.
+ *
+ * @return the standard channel layout or NULL when the iteration is
+ *         finished
+ */
+const AVChannelLayout *av_channel_layout_standard(void **opaque);
+
+/**
+ * Free any allocated data in the channel layout and reset the channel
+ * count to 0.
+ *
+ * @param channel_layout the layout structure to be uninitialized
+ */
+void av_channel_layout_uninit(AVChannelLayout *channel_layout);
+
+/**
+ * Make a copy of a channel layout. This differs from just assigning src to dst
+ * in that it allocates and copies the map for AV_CHANNEL_ORDER_CUSTOM.
+ *
+ * @note the destination channel_layout will be always uninitialized before copy.
+ *
+ * @param dst destination channel layout
+ * @param src source channel layout
+ * @return 0 on success, a negative AVERROR on error.
+ */
+int av_channel_layout_copy(AVChannelLayout *dst, const AVChannelLayout *src);
+
+/**
+ * Get a human-readable string describing the channel layout properties.
+ * The string will be in the same format that is accepted by
+ * @ref av_channel_layout_from_string(), allowing to rebuild the same
+ * channel layout, except for opaque pointers.
+ *
+ * @param channel_layout channel layout to be described
+ * @param buf pre-allocated buffer where to put the generated string
+ * @param buf_size size in bytes of the buffer.
+ * @return amount of bytes needed to hold the output string, or a negative AVERROR
+ *         on failure. If the returned value is bigger than buf_size, then the
+ *         string was truncated.
+ */
+int av_channel_layout_describe(const AVChannelLayout *channel_layout,
+                               char *buf, size_t buf_size);
+
+/**
+ * bprint variant of av_channel_layout_describe().
+ *
+ * @note the string will be appended to the bprint buffer.
+ * @return 0 on success, or a negative AVERROR value on failure.
+ */
+int av_channel_layout_describe_bprint(const AVChannelLayout *channel_layout,
+                                      struct AVBPrint *bp);
+
+/**
+ * Get the channel with the given index in a channel layout.
+ *
+ * @param channel_layout input channel layout
+ * @param idx index of the channel
+ * @return channel with the index idx in channel_layout on success or
+ *         AV_CHAN_NONE on failure (if idx is not valid or the channel order is
+ *         unspecified)
+ */
+enum AVChannel
+av_channel_layout_channel_from_index(const AVChannelLayout *channel_layout, unsigned int idx);
+
+/**
+ * Get the index of a given channel in a channel layout. In case multiple
+ * channels are found, only the first match will be returned.
+ *
+ * @param channel_layout input channel layout
+ * @param channel the channel whose index to obtain
+ * @return index of channel in channel_layout on success or a negative number if
+ *         channel is not present in channel_layout.
+ */
+int av_channel_layout_index_from_channel(const AVChannelLayout *channel_layout,
+                                         enum AVChannel channel);
+
+/**
+ * Get the index in a channel layout of a channel described by the given string.
+ * In case multiple channels are found, only the first match will be returned.
+ *
+ * This function accepts channel names in the same format as
+ * @ref av_channel_from_string().
+ *
+ * @param channel_layout input channel layout
+ * @param name string describing the channel whose index to obtain
+ * @return a channel index described by the given string, or a negative AVERROR
+ *         value.
+ */
+int av_channel_layout_index_from_string(const AVChannelLayout *channel_layout,
+                                        const char *name);
+
+/**
+ * Get a channel described by the given string.
+ *
+ * This function accepts channel names in the same format as
+ * @ref av_channel_from_string().
+ *
+ * @param channel_layout input channel layout
+ * @param name string describing the channel to obtain
+ * @return a channel described by the given string in channel_layout on success
+ *         or AV_CHAN_NONE on failure (if the string is not valid or the channel
+ *         order is unspecified)
+ */
+enum AVChannel
+av_channel_layout_channel_from_string(const AVChannelLayout *channel_layout,
+                                      const char *name);
+
+/**
+ * Find out what channels from a given set are present in a channel layout,
+ * without regard for their positions.
+ *
+ * @param channel_layout input channel layout
+ * @param mask a combination of AV_CH_* representing a set of channels
+ * @return a bitfield representing all the channels from mask that are present
+ *         in channel_layout
+ */
+uint64_t av_channel_layout_subset(const AVChannelLayout *channel_layout,
+                                  uint64_t mask);
+
+/**
+ * Check whether a channel layout is valid, i.e. can possibly describe audio
+ * data.
+ *
+ * @param channel_layout input channel layout
+ * @return 1 if channel_layout is valid, 0 otherwise.
+ */
+int av_channel_layout_check(const AVChannelLayout *channel_layout);
+
+/**
+ * Check whether two channel layouts are semantically the same, i.e. the same
+ * channels are present on the same positions in both.
+ *
+ * If one of the channel layouts is AV_CHANNEL_ORDER_UNSPEC, while the other is
+ * not, they are considered to be unequal. If both are AV_CHANNEL_ORDER_UNSPEC,
+ * they are considered equal iff the channel counts are the same in both.
+ *
+ * @param chl input channel layout
+ * @param chl1 input channel layout
+ * @return 0 if chl and chl1 are equal, 1 if they are not equal. A negative
+ *         AVERROR code if one or both are invalid.
+ */
+int av_channel_layout_compare(const AVChannelLayout *chl, const AVChannelLayout *chl1);
+
+/**
+ * Return the order if the layout is n-th order standard-order ambisonic.
+ * The presence of optional extra non-diegetic channels at the end is not taken
+ * into account.
+ *
+ * @param channel_layout input channel layout
+ * @return the order of the layout, a negative error code otherwise.
+ */
+int av_channel_layout_ambisonic_order(const AVChannelLayout *channel_layout);
+
+/**
+ * The conversion must be lossless.
+ */
+#define AV_CHANNEL_LAYOUT_RETYPE_FLAG_LOSSLESS (1 << 0)
+
+/**
+ * The specified retype target order is ignored and the simplest possible
+ * (canonical) order is used for which the input layout can be losslessy
+ * represented.
+ */
+#define AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL (1 << 1)
+
+/**
+ * Change the AVChannelOrder of a channel layout.
+ *
+ * Change of AVChannelOrder can be either lossless or lossy. In case of a
+ * lossless conversion all the channel designations and the associated channel
+ * names (if any) are kept. On a lossy conversion the channel names and channel
+ * designations might be lost depending on the capabilities of the desired
+ * AVChannelOrder. Note that some conversions are simply not possible in which
+ * case this function returns AVERROR(ENOSYS).
+ *
+ * The following conversions are supported:
+ *
+ * Any       -> Custom     : Always possible, always lossless.
+ * Any       -> Unspecified: Always possible, lossless if channel designations
+ *   are all unknown and channel names are not used, lossy otherwise.
+ * Custom    -> Ambisonic  : Possible if it contains ambisonic channels with
+ *   optional non-diegetic channels in the end. Lossy if the channels have
+ *   custom names, lossless otherwise.
+ * Custom    -> Native     : Possible if it contains native channels in native
+ *     order. Lossy if the channels have custom names, lossless otherwise.
+ *
+ * On error this function keeps the original channel layout untouched.
+ *
+ * @param channel_layout channel layout which will be changed
+ * @param order the desired channel layout order
+ * @param flags a combination of AV_CHANNEL_LAYOUT_RETYPE_FLAG_* constants
+ * @return 0 if the conversion was successful and lossless or if the channel
+ *           layout was already in the desired order
+ *         >0 if the conversion was successful but lossy
+ *         AVERROR(ENOSYS) if the conversion was not possible (or would be
+ *           lossy and AV_CHANNEL_LAYOUT_RETYPE_FLAG_LOSSLESS was specified)
+ *         AVERROR(EINVAL), AVERROR(ENOMEM) on error
+ */
+int av_channel_layout_retype(AVChannelLayout *channel_layout, enum AVChannelOrder order, int flags);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_CHANNEL_LAYOUT_H */

ffmpeg/libavutil/colorspace.h

@@ -0,0 +1,150 @@
+/*
+ * Colorspace conversion defines
+ * Copyright (c) 2001, 2002, 2003 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Various defines for YUV<->RGB conversion
+ */
+
+#ifndef AVUTIL_COLORSPACE_H
+#define AVUTIL_COLORSPACE_H
+
+#define SCALEBITS 10
+#define ONE_HALF  (1 << (SCALEBITS - 1))
+#define FIX(x)    ((int) ((x) * (1<<SCALEBITS) + 0.5))
+
+#define YUV_TO_RGB1_CCIR(cb1, cr1)\
+{\
+    cb = (cb1) - 128;\
+    cr = (cr1) - 128;\
+    r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;\
+    g_add = - FIX(0.34414*255.0/224.0) * cb - FIX(0.71414*255.0/224.0) * cr + \
+            ONE_HALF;\
+    b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\
+}
+
+#define YUV_TO_RGB1_CCIR_BT709(cb1, cr1)                      \
+    {                                                         \
+        cb    = (cb1) - 128;                                  \
+        cr    = (cr1) - 128;                                  \
+        r_add = ONE_HALF + FIX(1.5747 * 255.0 / 224.0) * cr;  \
+        g_add = ONE_HALF - FIX(0.1873 * 255.0 / 224.0) * cb - \
+                           FIX(0.4682 * 255.0 / 224.0) * cr;  \
+        b_add = ONE_HALF + FIX(1.8556 * 255.0 / 224.0) * cb;  \
+    }
+
+// To be used for the BT709 variant as well
+#define YUV_TO_RGB2_CCIR(r, g, b, y1)\
+{\
+    y = ((y1) - 16) * FIX(255.0/219.0);\
+    r = cm[(y + r_add) >> SCALEBITS];\
+    g = cm[(y + g_add) >> SCALEBITS];\
+    b = cm[(y + b_add) >> SCALEBITS];\
+}
+
+#define YUV_TO_RGB1(cb1, cr1)\
+{\
+    cb = (cb1) - 128;\
+    cr = (cr1) - 128;\
+    r_add = FIX(1.40200) * cr + ONE_HALF;\
+    g_add = - FIX(0.34414) * cb - FIX(0.71414) * cr + ONE_HALF;\
+    b_add = FIX(1.77200) * cb + ONE_HALF;\
+}
+
+#define YUV_TO_RGB2(r, g, b, y1)\
+{\
+    y = (y1) << SCALEBITS;\
+    r = cm[(y + r_add) >> SCALEBITS];\
+    g = cm[(y + g_add) >> SCALEBITS];\
+    b = cm[(y + b_add) >> SCALEBITS];\
+}
+
+#define Y_CCIR_TO_JPEG(y)\
+ cm[((y) * FIX(255.0/219.0) + (ONE_HALF - 16 * FIX(255.0/219.0))) >> SCALEBITS]
+
+#define Y_JPEG_TO_CCIR(y)\
+ (((y) * FIX(219.0/255.0) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)
+
+#define C_CCIR_TO_JPEG(y)\
+ cm[(((y) - 128) * FIX(127.0/112.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS]
+
+/* NOTE: the clamp is really necessary! */
+static inline int C_JPEG_TO_CCIR(int y) {
+    y = (((y - 128) * FIX(112.0/127.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS);
+    if (y < 16)
+        y = 16;
+    return y;
+}
+
+
+#define RGB_TO_Y_CCIR(r, g, b) \
+((FIX(0.29900*219.0/255.0) * (r) + FIX(0.58700*219.0/255.0) * (g) + \
+  FIX(0.11400*219.0/255.0) * (b) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)
+
+#define RGB_TO_U_CCIR(r1, g1, b1, shift)\
+(((- FIX(0.16874*224.0/255.0) * r1 - FIX(0.33126*224.0/255.0) * g1 +         \
+     FIX(0.50000*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
+
+#define RGB_TO_V_CCIR(r1, g1, b1, shift)\
+(((FIX(0.50000*224.0/255.0) * r1 - FIX(0.41869*224.0/255.0) * g1 -           \
+   FIX(0.08131*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
+
+#define RGB_TO_Y_JPEG(r, g, b) \
+(FFMIN((FIX(0.29900) * (r) + FIX(0.58700) * (g) + \
+  FIX(0.11400) * (b) + (ONE_HALF)) >> SCALEBITS, 255))
+
+#define RGB_TO_U_JPEG(r1, g1, b1)\
+(((- FIX(0.16874) * r1 - FIX(0.33126) * g1 + \
+     FIX(0.50000) * b1 + (ONE_HALF) - 1) >> (SCALEBITS)) + 128)
+
+#define RGB_TO_V_JPEG(r1, g1, b1)\
+(((FIX(0.50000) * r1 - FIX(0.41869) * g1 - \
+   FIX(0.08131) * b1 + (ONE_HALF) - 1) >> (SCALEBITS)) + 128)
+
+// Conversion macros for 8-bit RGB to YUV
+// Derived from ITU-R BT.709-6 (06/2015) Item 3.5
+// https://www.itu.int/rec/R-REC-BT.709-6-201506-I/en
+
+#define RGB_TO_Y_BT709(r, g, b) \
+((FIX(0.21260*219.0/255.0) * (r) + FIX(0.71520*219.0/255.0) * (g) + \
+  FIX(0.07220*219.0/255.0) * (b) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)
+
+#define RGB_TO_U_BT709(r1, g1, b1, shift)\
+(((- FIX(0.11457*224.0/255.0) * r1 - FIX(0.38543*224.0/255.0) * g1 +         \
+     FIX(0.50000*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
+
+#define RGB_TO_V_BT709(r1, g1, b1, shift)\
+(((FIX(0.50000*224.0/255.0) * r1 - FIX(0.45415*224.0/255.0) * g1 -           \
+   FIX(0.04585*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
+
+#define RGB_TO_Y_BT709_FULL(r, g, b) \
+(FFMIN((FIX(0.21260) * (r) + FIX(0.71520) * (g) + \
+  FIX(0.07220) * (b) + (ONE_HALF)) >> SCALEBITS, 255))
+
+#define RGB_TO_U_BT709_FULL(r1, g1, b1)\
+(((- FIX(0.11457) * r1 - FIX(0.38543) * g1 + \
+     FIX(0.50000) * b1 + (ONE_HALF) - 1) >> (SCALEBITS)) + 128)
+
+#define RGB_TO_V_BT709_FULL(r1, g1, b1)\
+(((FIX(0.50000) * r1 - FIX(0.45415) * g1 - \
+   FIX(0.04585) * b1 + (ONE_HALF) - 1) >> (SCALEBITS)) + 128)
+
+#endif /* AVUTIL_COLORSPACE_H */

ffmpeg/libavutil/common.h

@@ -0,0 +1,589 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * common internal and external API header
+ */
+
+#ifndef AVUTIL_COMMON_H
+#define AVUTIL_COMMON_H
+
+#if defined(__cplusplus) && !defined(__STDC_CONSTANT_MACROS) && !defined(UINT64_C)
+#error missing -D__STDC_CONSTANT_MACROS / #define __STDC_CONSTANT_MACROS
+#endif
+
+#include <errno.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <math.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "attributes.h"
+#include "error.h"
+#include "macros.h"
+#include "version.h"
+
+#ifdef HAVE_AV_CONFIG_H
+#   include "config.h"
+#   include "intmath.h"
+#   include "internal.h"
+#else
+#   include "mem.h"
+#endif /* HAVE_AV_CONFIG_H */
+
+//rounded division & shift
+#define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
+/* assume b>0 */
+#define ROUNDED_DIV(a,b) (((a)>=0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
+/* Fast a/(1<<b) rounded toward +inf. Assume a>=0 and b>=0 */
+#define AV_CEIL_RSHIFT(a,b) (!av_builtin_constant_p(b) ? -((-(a)) >> (b)) \
+                                                       : ((a) + (1<<(b)) - 1) >> (b))
+/* Backwards compat. */
+#define FF_CEIL_RSHIFT AV_CEIL_RSHIFT
+
+#define FFUDIV(a,b) (((a)>0 ?(a):(a)-(b)+1) / (b))
+#define FFUMOD(a,b) ((a)-(b)*FFUDIV(a,b))
+
+/**
+ * Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they
+ * are not representable as absolute values of their type. This is the same
+ * as with *abs()
+ * @see FFNABS()
+ */
+#define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
+#define FFSIGN(a) ((a) > 0 ? 1 : -1)
+
+/**
+ * Negative Absolute value.
+ * this works for all integers of all types.
+ * As with many macros, this evaluates its argument twice, it thus must not have
+ * a sideeffect, that is FFNABS(x++) has undefined behavior.
+ */
+#define FFNABS(a) ((a) <= 0 ? (a) : (-(a)))
+
+/**
+ * Unsigned Absolute value.
+ * This takes the absolute value of a signed int and returns it as a unsigned.
+ * This also works with INT_MIN which would otherwise not be representable
+ * As with many macros, this evaluates its argument twice.
+ */
+#define FFABSU(a) ((a) <= 0 ? -(unsigned)(a) : (unsigned)(a))
+#define FFABS64U(a) ((a) <= 0 ? -(uint64_t)(a) : (uint64_t)(a))
+
+/* misc math functions */
+
+#ifndef av_ceil_log2
+#   define av_ceil_log2     av_ceil_log2_c
+#endif
+#ifndef av_clip
+#   define av_clip          av_clip_c
+#endif
+#ifndef av_clip64
+#   define av_clip64        av_clip64_c
+#endif
+#ifndef av_clip_uint8
+#   define av_clip_uint8    av_clip_uint8_c
+#endif
+#ifndef av_clip_int8
+#   define av_clip_int8     av_clip_int8_c
+#endif
+#ifndef av_clip_uint16
+#   define av_clip_uint16   av_clip_uint16_c
+#endif
+#ifndef av_clip_int16
+#   define av_clip_int16    av_clip_int16_c
+#endif
+#ifndef av_clipl_int32
+#   define av_clipl_int32   av_clipl_int32_c
+#endif
+#ifndef av_clip_intp2
+#   define av_clip_intp2    av_clip_intp2_c
+#endif
+#ifndef av_clip_uintp2
+#   define av_clip_uintp2   av_clip_uintp2_c
+#endif
+#ifndef av_sat_add32
+#   define av_sat_add32     av_sat_add32_c
+#endif
+#ifndef av_sat_dadd32
+#   define av_sat_dadd32    av_sat_dadd32_c
+#endif
+#ifndef av_sat_sub32
+#   define av_sat_sub32     av_sat_sub32_c
+#endif
+#ifndef av_sat_dsub32
+#   define av_sat_dsub32    av_sat_dsub32_c
+#endif
+#ifndef av_sat_add64
+#   define av_sat_add64     av_sat_add64_c
+#endif
+#ifndef av_sat_sub64
+#   define av_sat_sub64     av_sat_sub64_c
+#endif
+#ifndef av_clipf
+#   define av_clipf         av_clipf_c
+#endif
+#ifndef av_clipd
+#   define av_clipd         av_clipd_c
+#endif
+#ifndef av_zero_extend
+#   define av_zero_extend   av_zero_extend_c
+#endif
+#ifndef av_popcount
+#   define av_popcount      av_popcount_c
+#endif
+#ifndef av_popcount64
+#   define av_popcount64    av_popcount64_c
+#endif
+#ifndef av_parity
+#   define av_parity        av_parity_c
+#endif
+
+#ifndef av_log2
+av_const int av_log2(unsigned v);
+#endif
+
+#ifndef av_log2_16bit
+av_const int av_log2_16bit(unsigned v);
+#endif
+
+/**
+ * Clip a signed integer value into the amin-amax range.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static av_always_inline av_const int av_clip_c(int a, int amin, int amax)
+{
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+    if (amin > amax) abort();
+#endif
+    if      (a < amin) return amin;
+    else if (a > amax) return amax;
+    else               return a;
+}
+
+/**
+ * Clip a signed 64bit integer value into the amin-amax range.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static av_always_inline av_const int64_t av_clip64_c(int64_t a, int64_t amin, int64_t amax)
+{
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+    if (amin > amax) abort();
+#endif
+    if      (a < amin) return amin;
+    else if (a > amax) return amax;
+    else               return a;
+}
+
+/**
+ * Clip a signed integer value into the 0-255 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const uint8_t av_clip_uint8_c(int a)
+{
+    if (a&(~0xFF)) return (~a)>>31;
+    else           return a;
+}
+
+/**
+ * Clip a signed integer value into the -128,127 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const int8_t av_clip_int8_c(int a)
+{
+    if ((a+0x80U) & ~0xFF) return (a>>31) ^ 0x7F;
+    else                  return a;
+}
+
+/**
+ * Clip a signed integer value into the 0-65535 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const uint16_t av_clip_uint16_c(int a)
+{
+    if (a&(~0xFFFF)) return (~a)>>31;
+    else             return a;
+}
+
+/**
+ * Clip a signed integer value into the -32768,32767 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const int16_t av_clip_int16_c(int a)
+{
+    if ((a+0x8000U) & ~0xFFFF) return (a>>31) ^ 0x7FFF;
+    else                      return a;
+}
+
+/**
+ * Clip a signed 64-bit integer value into the -2147483648,2147483647 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const int32_t av_clipl_int32_c(int64_t a)
+{
+    if ((a+UINT64_C(0x80000000)) & ~UINT64_C(0xFFFFFFFF)) return (int32_t)((a>>63) ^ 0x7FFFFFFF);
+    else                                                  return (int32_t)a;
+}
+
+/**
+ * Clip a signed integer into the -(2^p),(2^p-1) range.
+ * @param  a value to clip
+ * @param  p bit position to clip at
+ * @return clipped value
+ */
+static av_always_inline av_const int av_clip_intp2_c(int a, int p)
+{
+    if (((unsigned)a + (1U << p)) & ~((2U << p) - 1))
+        return (a >> 31) ^ ((1 << p) - 1);
+    else
+        return a;
+}
+
+/**
+ * Clip a signed integer to an unsigned power of two range.
+ * @param  a value to clip
+ * @param  p bit position to clip at
+ * @return clipped value
+ */
+static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p)
+{
+    if (a & ~((1U<<p) - 1)) return (~a) >> 31 & ((1U<<p) - 1);
+    else                    return  a;
+}
+
+/**
+ * Clear high bits from an unsigned integer starting with specific bit position
+ * @param  a value to clip
+ * @param  p bit position to clip at. Must be between 0 and 31.
+ * @return clipped value
+ */
+static av_always_inline av_const unsigned av_zero_extend_c(unsigned a, unsigned p)
+{
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+    if (p > 31) abort();
+#endif
+    return a & ((1U << p) - 1);
+}
+
+#if FF_API_MOD_UINTP2
+#ifndef av_mod_uintp2
+#   define av_mod_uintp2 av_mod_uintp2_c
+#endif
+attribute_deprecated
+static av_always_inline av_const unsigned av_mod_uintp2_c(unsigned a, unsigned p)
+{
+    return av_zero_extend_c(a, p);
+}
+#endif
+
+/**
+ * Add two signed 32-bit values with saturation.
+ *
+ * @param  a one value
+ * @param  b another value
+ * @return sum with signed saturation
+ */
+static av_always_inline int av_sat_add32_c(int a, int b)
+{
+    return av_clipl_int32((int64_t)a + b);
+}
+
+/**
+ * Add a doubled value to another value with saturation at both stages.
+ *
+ * @param  a first value
+ * @param  b value doubled and added to a
+ * @return sum sat(a + sat(2*b)) with signed saturation
+ */
+static av_always_inline int av_sat_dadd32_c(int a, int b)
+{
+    return av_sat_add32(a, av_sat_add32(b, b));
+}
+
+/**
+ * Subtract two signed 32-bit values with saturation.
+ *
+ * @param  a one value
+ * @param  b another value
+ * @return difference with signed saturation
+ */
+static av_always_inline int av_sat_sub32_c(int a, int b)
+{
+    return av_clipl_int32((int64_t)a - b);
+}
+
+/**
+ * Subtract a doubled value from another value with saturation at both stages.
+ *
+ * @param  a first value
+ * @param  b value doubled and subtracted from a
+ * @return difference sat(a - sat(2*b)) with signed saturation
+ */
+static av_always_inline int av_sat_dsub32_c(int a, int b)
+{
+    return av_sat_sub32(a, av_sat_add32(b, b));
+}
+
+/**
+ * Add two signed 64-bit values with saturation.
+ *
+ * @param  a one value
+ * @param  b another value
+ * @return sum with signed saturation
+ */
+static av_always_inline int64_t av_sat_add64_c(int64_t a, int64_t b) {
+#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)) || AV_HAS_BUILTIN(__builtin_add_overflow)
+    int64_t tmp;
+    return !__builtin_add_overflow(a, b, &tmp) ? tmp : (tmp < 0 ? INT64_MAX : INT64_MIN);
+#else
+    int64_t s = a+(uint64_t)b;
+    if ((int64_t)(a^b | ~s^b) >= 0)
+        return INT64_MAX ^ (b >> 63);
+    return s;
+#endif
+}
+
+/**
+ * Subtract two signed 64-bit values with saturation.
+ *
+ * @param  a one value
+ * @param  b another value
+ * @return difference with signed saturation
+ */
+static av_always_inline int64_t av_sat_sub64_c(int64_t a, int64_t b) {
+#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)) || AV_HAS_BUILTIN(__builtin_sub_overflow)
+    int64_t tmp;
+    return !__builtin_sub_overflow(a, b, &tmp) ? tmp : (tmp < 0 ? INT64_MAX : INT64_MIN);
+#else
+    if (b <= 0 && a >= INT64_MAX + b)
+        return INT64_MAX;
+    if (b >= 0 && a <= INT64_MIN + b)
+        return INT64_MIN;
+    return a - b;
+#endif
+}
+
+/**
+ * Clip a float value into the amin-amax range.
+ * If a is nan or -inf amin will be returned.
+ * If a is +inf amax will be returned.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static av_always_inline av_const float av_clipf_c(float a, float amin, float amax)
+{
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+    if (amin > amax) abort();
+#endif
+    return FFMIN(FFMAX(a, amin), amax);
+}
+
+/**
+ * Clip a double value into the amin-amax range.
+ * If a is nan or -inf amin will be returned.
+ * If a is +inf amax will be returned.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static av_always_inline av_const double av_clipd_c(double a, double amin, double amax)
+{
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+    if (amin > amax) abort();
+#endif
+    return FFMIN(FFMAX(a, amin), amax);
+}
+
+/** Compute ceil(log2(x)).
+ * @param x value used to compute ceil(log2(x))
+ * @return computed ceiling of log2(x)
+ */
+static av_always_inline av_const int av_ceil_log2_c(int x)
+{
+    return av_log2((x - 1U) << 1);
+}
+
+/**
+ * Count number of bits set to one in x
+ * @param x value to count bits of
+ * @return the number of bits set to one in x
+ */
+static av_always_inline av_const int av_popcount_c(uint32_t x)
+{
+    x -= (x >> 1) & 0x55555555;
+    x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
+    x = (x + (x >> 4)) & 0x0F0F0F0F;
+    x += x >> 8;
+    return (x + (x >> 16)) & 0x3F;
+}
+
+/**
+ * Count number of bits set to one in x
+ * @param x value to count bits of
+ * @return the number of bits set to one in x
+ */
+static av_always_inline av_const int av_popcount64_c(uint64_t x)
+{
+    return av_popcount((uint32_t)x) + av_popcount((uint32_t)(x >> 32));
+}
+
+static av_always_inline av_const int av_parity_c(uint32_t v)
+{
+    return av_popcount(v) & 1;
+}
+
+/**
+ * Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form.
+ *
+ * @param val      Output value, must be an lvalue of type uint32_t.
+ * @param GET_BYTE Expression reading one byte from the input.
+ *                 Evaluated up to 7 times (4 for the currently
+ *                 assigned Unicode range).  With a memory buffer
+ *                 input, this could be *ptr++, or if you want to make sure
+ *                 that *ptr stops at the end of a NULL terminated string then
+ *                 *ptr ? *ptr++ : 0
+ * @param ERROR    Expression to be evaluated on invalid input,
+ *                 typically a goto statement.
+ *
+ * @warning ERROR should not contain a loop control statement which
+ * could interact with the internal while loop, and should force an
+ * exit from the macro code (e.g. through a goto or a return) in order
+ * to prevent undefined results.
+ */
+#define GET_UTF8(val, GET_BYTE, ERROR)\
+    val= (GET_BYTE);\
+    {\
+        uint32_t top = (val & 128) >> 1;\
+        if ((val & 0xc0) == 0x80 || val >= 0xFE)\
+            {ERROR}\
+        while (val & top) {\
+            unsigned int tmp = (GET_BYTE) - 128;\
+            if(tmp>>6)\
+                {ERROR}\
+            val= (val<<6) + tmp;\
+            top <<= 5;\
+        }\
+        val &= (top << 1) - 1;\
+    }
+
+/**
+ * Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form.
+ *
+ * @param val       Output value, must be an lvalue of type uint32_t.
+ * @param GET_16BIT Expression returning two bytes of UTF-16 data converted
+ *                  to native byte order.  Evaluated one or two times.
+ * @param ERROR     Expression to be evaluated on invalid input,
+ *                  typically a goto statement.
+ */
+#define GET_UTF16(val, GET_16BIT, ERROR)\
+    val = (GET_16BIT);\
+    {\
+        unsigned int hi = val - 0xD800;\
+        if (hi < 0x800) {\
+            val = (GET_16BIT) - 0xDC00;\
+            if (val > 0x3FFU || hi > 0x3FFU)\
+                {ERROR}\
+            val += (hi<<10) + 0x10000;\
+        }\
+    }\
+
+/**
+ * @def PUT_UTF8(val, tmp, PUT_BYTE)
+ * Convert a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long).
+ * @param val is an input-only argument and should be of type uint32_t. It holds
+ * a UCS-4 encoded Unicode character that is to be converted to UTF-8. If
+ * val is given as a function it is executed only once.
+ * @param tmp is a temporary variable and should be of type uint8_t. It
+ * represents an intermediate value during conversion that is to be
+ * output by PUT_BYTE.
+ * @param PUT_BYTE writes the converted UTF-8 bytes to any proper destination.
+ * It could be a function or a statement, and uses tmp as the input byte.
+ * For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be
+ * executed up to 4 times for values in the valid UTF-8 range and up to
+ * 7 times in the general case, depending on the length of the converted
+ * Unicode character.
+ */
+#define PUT_UTF8(val, tmp, PUT_BYTE)\
+    {\
+        int bytes, shift;\
+        uint32_t in = val;\
+        if (in < 0x80) {\
+            tmp = in;\
+            PUT_BYTE\
+        } else {\
+            bytes = (av_log2(in) + 4) / 5;\
+            shift = (bytes - 1) * 6;\
+            tmp = (256 - (256 >> bytes)) | (in >> shift);\
+            PUT_BYTE\
+            while (shift >= 6) {\
+                shift -= 6;\
+                tmp = 0x80 | ((in >> shift) & 0x3f);\
+                PUT_BYTE\
+            }\
+        }\
+    }
+
+/**
+ * @def PUT_UTF16(val, tmp, PUT_16BIT)
+ * Convert a 32-bit Unicode character to its UTF-16 encoded form (2 or 4 bytes).
+ * @param val is an input-only argument and should be of type uint32_t. It holds
+ * a UCS-4 encoded Unicode character that is to be converted to UTF-16. If
+ * val is given as a function it is executed only once.
+ * @param tmp is a temporary variable and should be of type uint16_t. It
+ * represents an intermediate value during conversion that is to be
+ * output by PUT_16BIT.
+ * @param PUT_16BIT writes the converted UTF-16 data to any proper destination
+ * in desired endianness. It could be a function or a statement, and uses tmp
+ * as the input byte.  For example, PUT_BYTE could be "*output++ = tmp;"
+ * PUT_BYTE will be executed 1 or 2 times depending on input character.
+ */
+#define PUT_UTF16(val, tmp, PUT_16BIT)\
+    {\
+        uint32_t in = val;\
+        if (in < 0x10000) {\
+            tmp = in;\
+            PUT_16BIT\
+        } else {\
+            tmp = 0xD800 | ((in - 0x10000) >> 10);\
+            PUT_16BIT\
+            tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\
+            PUT_16BIT\
+        }\
+    }\
+
+#endif /* AVUTIL_COMMON_H */

ffmpeg/libavutil/container_fifo.c

@@ -0,0 +1,219 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avassert.h"
+#include "container_fifo.h"
+#include "error.h"
+#include "fifo.h"
+#include "frame.h"
+#include "mem.h"
+#include "refstruct.h"
+
+struct AVContainerFifo {
+    AVFifo             *fifo;
+    AVRefStructPool    *pool;
+
+    void               *opaque;
+    void*             (*container_alloc)(void *opaque);
+    void              (*container_reset)(void *opaque, void *obj);
+    void              (*container_free) (void *opaque, void *obj);
+    int               (*fifo_transfer)  (void *opaque, void *dst, void *src, unsigned flags);
+
+};
+
+static int container_fifo_init_entry(AVRefStructOpaque opaque, void *obj)
+{
+    AVContainerFifo *cf = opaque.nc;
+    void **pobj = obj;
+
+    *pobj = cf->container_alloc(cf->opaque);
+    if (!*pobj)
+        return AVERROR(ENOMEM);
+
+    return 0;
+}
+
+static void container_fifo_reset_entry(AVRefStructOpaque opaque, void *obj)
+{
+    AVContainerFifo *cf = opaque.nc;
+    cf->container_reset(cf->opaque, *(void**)obj);
+}
+
+static void container_fifo_free_entry(AVRefStructOpaque opaque, void *obj)
+{
+    AVContainerFifo *cf = opaque.nc;
+    cf->container_free(cf->opaque, *(void**)obj);
+}
+
+AVContainerFifo*
+av_container_fifo_alloc(void *opaque,
+                        void* (*container_alloc)(void *opaque),
+                        void  (*container_reset)(void *opaque, void *obj),
+                        void  (*container_free) (void *opaque, void *obj),
+                        int   (*fifo_transfer)  (void *opaque, void *dst, void *src, unsigned flags),
+                        unsigned flags)
+{
+    AVContainerFifo *cf;
+
+    cf = av_mallocz(sizeof(*cf));
+    if (!cf)
+        return NULL;
+
+    cf->opaque          = opaque;
+    cf->container_alloc = container_alloc;
+    cf->container_reset = container_reset;
+    cf->container_free  = container_free;
+    cf->fifo_transfer   = fifo_transfer;
+
+    cf->fifo = av_fifo_alloc2(1, sizeof(void*), AV_FIFO_FLAG_AUTO_GROW);
+    if (!cf->fifo)
+        goto fail;
+
+    cf->pool = av_refstruct_pool_alloc_ext(sizeof(void*), 0, cf,
+                                           container_fifo_init_entry,
+                                           container_fifo_reset_entry,
+                                           container_fifo_free_entry,
+                                           NULL);
+    if (!cf->pool)
+        goto fail;
+
+    return cf;
+fail:
+    av_container_fifo_free(&cf);
+    return NULL;
+}
+
+void av_container_fifo_free(AVContainerFifo **pcf)
+{
+    AVContainerFifo *cf;
+
+    if (!*pcf)
+        return;
+
+    cf = *pcf;
+
+    if (cf->fifo) {
+        void *obj;
+        while (av_fifo_read(cf->fifo, &obj, 1) >= 0)
+            av_refstruct_unref(&obj);
+        av_fifo_freep2(&cf->fifo);
+    }
+
+    av_refstruct_pool_uninit(&cf->pool);
+
+    av_freep(pcf);
+}
+
+int av_container_fifo_read(AVContainerFifo *cf, void *obj, unsigned flags)
+{
+    void **psrc;
+    int ret;
+
+    ret = av_fifo_read(cf->fifo, &psrc, 1);
+    if (ret < 0)
+        return ret;
+
+    ret = cf->fifo_transfer(cf->opaque, obj, *psrc, flags);
+    av_refstruct_unref(&psrc);
+
+    return ret;
+}
+
+int av_container_fifo_peek(AVContainerFifo *cf, void **pdst, size_t offset)
+{
+    void **pobj;
+    int ret;
+
+    ret = av_fifo_peek(cf->fifo, &pobj, 1, offset);
+    if (ret < 0)
+        return ret;
+
+    *pdst = *pobj;
+
+    return 0;
+}
+
+void av_container_fifo_drain(AVContainerFifo *cf, size_t nb_elems)
+{
+    av_assert0(nb_elems <= av_fifo_can_read(cf->fifo));
+    while (nb_elems--) {
+        void **pobj;
+        int ret = av_fifo_read(cf->fifo, &pobj, 1);
+        av_assert0(ret >= 0);
+        av_refstruct_unref(&pobj);
+    }
+}
+
+int av_container_fifo_write(AVContainerFifo *cf, void *obj, unsigned flags)
+{
+    void **pdst;
+    int ret;
+
+    pdst = av_refstruct_pool_get(cf->pool);
+    if (!pdst)
+        return AVERROR(ENOMEM);
+
+    ret = cf->fifo_transfer(cf->opaque, *pdst, obj, flags);
+    if (ret < 0)
+        goto fail;
+
+    ret = av_fifo_write(cf->fifo, &pdst, 1);
+    if (ret < 0)
+        goto fail;
+
+    return 0;
+fail:
+    av_refstruct_unref(&pdst);
+    return ret;
+}
+
+size_t av_container_fifo_can_read(const AVContainerFifo *cf)
+{
+    return av_fifo_can_read(cf->fifo);
+}
+
+static void *frame_alloc(void *opaque)
+{
+    return av_frame_alloc();
+}
+
+static void frame_reset(void *opaque, void *obj)
+{
+    av_frame_unref(obj);
+}
+
+static void frame_free(void *opaque, void *obj)
+{
+    AVFrame *frame = obj;
+    av_frame_free(&frame);
+}
+
+static int frame_transfer(void *opaque, void *dst, void *src, unsigned flags)
+{
+    if (flags & AV_CONTAINER_FIFO_FLAG_REF)
+        return av_frame_ref(dst, src);
+
+    av_frame_move_ref(dst, src);
+    return 0;
+}
+
+AVContainerFifo *av_container_fifo_alloc_avframe(unsigned flags)
+{
+    return av_container_fifo_alloc(NULL, frame_alloc, frame_reset, frame_free,
+                                   frame_transfer, 0);
+}

ffmpeg/libavutil/container_fifo.h

@@ -0,0 +1,130 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CONTAINER_FIFO_H
+#define AVUTIL_CONTAINER_FIFO_H
+
+#include <stddef.h>
+
+/**
+ * AVContainerFifo is a FIFO for "containers" - dynamically allocated reusable
+ * structs (e.g. AVFrame or AVPacket). AVContainerFifo uses an internal pool of
+ * such containers to avoid allocating and freeing them repeatedly.
+ */
+typedef struct AVContainerFifo AVContainerFifo;
+
+enum AVContainerFifoFlags {
+    /**
+     * Signal to av_container_fifo_write() that it should make a new reference
+     * to data in src rather than consume its contents.
+     *
+     * @note you must handle this flag manually in your own fifo_transfer()
+     *       callback
+     */
+    AV_CONTAINER_FIFO_FLAG_REF  = (1 << 0),
+
+    /**
+     * This and all higher bits in flags may be set to any value by the caller
+     * and are guaranteed to be passed through to the fifo_transfer() callback
+     * and not be interpreted by AVContainerFifo code.
+     */
+    AV_CONTAINER_FIFO_FLAG_USER = (1 << 16),
+};
+
+/**
+ * Allocate a new AVContainerFifo for the container type defined by provided
+ * callbacks.
+ *
+ * @param opaque user data that will be passed to the callbacks provided to this
+ *               function
+ * @param container_alloc allocate a new container instance and return a pointer
+ *                        to it, or NULL on failure
+ * @param container_reset reset the provided container instance to a clean state
+ * @param container_free free the provided container instance
+ * @param fifo_transfer Transfer the contents of container src to dst.
+ * @param flags currently unused
+ *
+ * @return newly allocated AVContainerFifo, or NULL on failure
+ */
+AVContainerFifo*
+av_container_fifo_alloc(void *opaque,
+                        void* (*container_alloc)(void *opaque),
+                        void  (*container_reset)(void *opaque, void *obj),
+                        void  (*container_free) (void *opaque, void *obj),
+                        int   (*fifo_transfer)  (void *opaque, void *dst, void *src, unsigned flags),
+                        unsigned flags);
+
+/**
+ * Allocate an AVContainerFifo instance for AVFrames.
+ *
+ * @param flags currently unused
+ */
+AVContainerFifo *av_container_fifo_alloc_avframe(unsigned flags);
+
+/**
+ * Free a AVContainerFifo and everything in it.
+ */
+void av_container_fifo_free(AVContainerFifo **cf);
+
+/**
+ * Write the contents of obj to the FIFO.
+ *
+ * The fifo_transfer() callback previously provided to av_container_fifo_alloc()
+ * will be called with obj as src in order to perform the actual transfer.
+ */
+int av_container_fifo_write(AVContainerFifo *cf, void *obj, unsigned flags);
+
+/**
+ * Read the next available object from the FIFO into obj.
+ *
+ * The fifo_read() callback previously provided to av_container_fifo_alloc()
+ * will be called with obj as dst in order to perform the actual transfer.
+ */
+int av_container_fifo_read(AVContainerFifo *cf, void *obj, unsigned flags);
+
+/**
+ * Access objects stored in the FIFO without retrieving them. The
+ * fifo_transfer() callback will NOT be invoked and the FIFO state will not be
+ * modified.
+ *
+ * @param pobj Pointer to the object stored in the FIFO will be written here on
+ *             success. The object remains owned by the FIFO and the caller may
+ *             only access it as long as the FIFO is not modified.
+ * @param offset Position of the object to retrieve - 0 is the next item that
+ *               would be read, 1 the one after, etc. Must be smaller than
+ *               av_container_fifo_can_read().
+ *
+ * @retval 0 success, a pointer was written into pobj
+ * @retval AVERROR(EINVAL) invalid offset value
+ */
+int av_container_fifo_peek(AVContainerFifo *cf, void **pobj, size_t offset);
+
+/**
+ * Discard the specified number of elements from the FIFO.
+ *
+ * @param nb_elems number of elements to discard, MUST NOT be larger than
+ *                 av_fifo_can_read(f)
+ */
+void av_container_fifo_drain(AVContainerFifo *cf, size_t nb_elems);
+
+/**
+ * @return number of objects available for reading
+ */
+size_t av_container_fifo_can_read(const AVContainerFifo *cf);
+
+#endif // AVCODEC_CONTAINER_FIFO_H

ffmpeg/libavutil/cpu.c

@@ -0,0 +1,318 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#if HAVE_SCHED_GETAFFINITY
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE
+#endif
+#include <sched.h>
+#endif
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdatomic.h>
+
+#include "attributes.h"
+#include "cpu.h"
+#include "cpu_internal.h"
+#include "opt.h"
+#include "common.h"
+
+#if HAVE_GETPROCESSAFFINITYMASK || HAVE_WINRT
+#include <windows.h>
+#endif
+#if HAVE_SYSCTL
+#if HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#endif
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#if HAVE_GETAUXVAL || HAVE_ELF_AUX_INFO
+#include <sys/auxv.h>
+#endif
+
+static atomic_int cpu_flags = -1;
+static atomic_int cpu_count = -1;
+
+static int get_cpu_flags(void)
+{
+#if ARCH_MIPS
+    return ff_get_cpu_flags_mips();
+#elif ARCH_AARCH64
+    return ff_get_cpu_flags_aarch64();
+#elif ARCH_ARM
+    return ff_get_cpu_flags_arm();
+#elif ARCH_PPC
+    return ff_get_cpu_flags_ppc();
+#elif ARCH_RISCV
+    return ff_get_cpu_flags_riscv();
+#elif ARCH_WASM
+    return ff_get_cpu_flags_wasm();
+#elif ARCH_X86
+    return ff_get_cpu_flags_x86();
+#elif ARCH_LOONGARCH
+    return ff_get_cpu_flags_loongarch();
+#endif
+    return 0;
+}
+
+void av_force_cpu_flags(int arg){
+    if (ARCH_X86 &&
+           (arg & ( AV_CPU_FLAG_3DNOW    |
+                    AV_CPU_FLAG_3DNOWEXT |
+                    AV_CPU_FLAG_MMXEXT   |
+                    AV_CPU_FLAG_SSE      |
+                    AV_CPU_FLAG_SSE2     |
+                    AV_CPU_FLAG_SSE2SLOW |
+                    AV_CPU_FLAG_SSE3     |
+                    AV_CPU_FLAG_SSE3SLOW |
+                    AV_CPU_FLAG_SSSE3    |
+                    AV_CPU_FLAG_SSE4     |
+                    AV_CPU_FLAG_SSE42    |
+                    AV_CPU_FLAG_AVX      |
+                    AV_CPU_FLAG_AVXSLOW  |
+                    AV_CPU_FLAG_XOP      |
+                    AV_CPU_FLAG_FMA3     |
+                    AV_CPU_FLAG_FMA4     |
+                    AV_CPU_FLAG_AVX2     |
+                    AV_CPU_FLAG_AVX512   ))
+        && !(arg & AV_CPU_FLAG_MMX)) {
+        av_log(NULL, AV_LOG_WARNING, "MMX implied by specified flags\n");
+        arg |= AV_CPU_FLAG_MMX;
+    }
+
+    atomic_store_explicit(&cpu_flags, arg, memory_order_relaxed);
+}
+
+int av_get_cpu_flags(void)
+{
+    int flags = atomic_load_explicit(&cpu_flags, memory_order_relaxed);
+    if (flags == -1) {
+        flags = get_cpu_flags();
+        atomic_store_explicit(&cpu_flags, flags, memory_order_relaxed);
+    }
+    return flags;
+}
+
+int av_parse_cpu_caps(unsigned *flags, const char *s)
+{
+        static const AVOption cpuflags_opts[] = {
+        { "flags"   , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
+#if   ARCH_PPC
+        { "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ALTIVEC  },    .unit = "flags" },
+        { "vsx"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VSX      },    .unit = "flags" },
+        { "power8"  , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_POWER8   },    .unit = "flags" },
+#elif ARCH_X86
+        { "mmx"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX      },    .unit = "flags" },
+        { "mmx2"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX2     },    .unit = "flags" },
+        { "mmxext"  , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX2     },    .unit = "flags" },
+        { "sse"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE      },    .unit = "flags" },
+        { "sse2"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE2     },    .unit = "flags" },
+        { "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE2SLOW },    .unit = "flags" },
+        { "sse3"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE3     },    .unit = "flags" },
+        { "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE3SLOW },    .unit = "flags" },
+        { "ssse3"   , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSSE3    },    .unit = "flags" },
+        { "atom"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ATOM     },    .unit = "flags" },
+        { "sse4.1"  , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE4     },    .unit = "flags" },
+        { "sse4.2"  , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SSE42    },    .unit = "flags" },
+        { "avx"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX      },    .unit = "flags" },
+        { "avxslow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVXSLOW  },    .unit = "flags" },
+        { "xop"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_XOP      },    .unit = "flags" },
+        { "fma3"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_FMA3     },    .unit = "flags" },
+        { "fma4"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_FMA4     },    .unit = "flags" },
+        { "avx2"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX2     },    .unit = "flags" },
+        { "bmi1"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI1     },    .unit = "flags" },
+        { "bmi2"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI2     },    .unit = "flags" },
+        { "3dnow"   , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_3DNOW    },    .unit = "flags" },
+        { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_3DNOWEXT },    .unit = "flags" },
+        { "cmov",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_CMOV     },    .unit = "flags" },
+        { "aesni",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AESNI    },    .unit = "flags" },
+        { "avx512"  , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX512   },    .unit = "flags" },
+        { "avx512icl",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_AVX512ICL   }, .unit = "flags" },
+        { "slowgather", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SLOW_GATHER }, .unit = "flags" },
+
+#define CPU_FLAG_P2 AV_CPU_FLAG_CMOV | AV_CPU_FLAG_MMX
+#define CPU_FLAG_P3 CPU_FLAG_P2 | AV_CPU_FLAG_MMX2 | AV_CPU_FLAG_SSE
+#define CPU_FLAG_P4 CPU_FLAG_P3| AV_CPU_FLAG_SSE2
+        { "pentium2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P2          },    .unit = "flags" },
+        { "pentium3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P3          },    .unit = "flags" },
+        { "pentium4", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_P4          },    .unit = "flags" },
+
+#define CPU_FLAG_K62 AV_CPU_FLAG_MMX | AV_CPU_FLAG_3DNOW
+#define CPU_FLAG_ATHLON   CPU_FLAG_K62 | AV_CPU_FLAG_CMOV | AV_CPU_FLAG_3DNOWEXT | AV_CPU_FLAG_MMX2
+#define CPU_FLAG_ATHLONXP CPU_FLAG_ATHLON | AV_CPU_FLAG_SSE
+#define CPU_FLAG_K8  CPU_FLAG_ATHLONXP | AV_CPU_FLAG_SSE2
+        { "k6",       NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMX      },    .unit = "flags" },
+        { "k62",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_K62         },    .unit = "flags" },
+        { "athlon",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_ATHLON      },    .unit = "flags" },
+        { "athlonxp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_ATHLONXP    },    .unit = "flags" },
+        { "k8",       NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPU_FLAG_K8          },    .unit = "flags" },
+#elif ARCH_ARM
+        { "armv5te",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV5TE  },    .unit = "flags" },
+        { "armv6",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6    },    .unit = "flags" },
+        { "armv6t2",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6T2  },    .unit = "flags" },
+        { "vfp",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP      },    .unit = "flags" },
+        { "vfp_vm",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP_VM   },    .unit = "flags" },
+        { "vfpv3",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFPV3    },    .unit = "flags" },
+        { "neon",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON     },    .unit = "flags" },
+        { "setend",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SETEND   },    .unit = "flags" },
+#elif ARCH_AARCH64
+        { "armv8",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV8    },    .unit = "flags" },
+        { "neon",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON     },    .unit = "flags" },
+        { "vfp",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP      },    .unit = "flags" },
+        { "dotprod",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_DOTPROD  },    .unit = "flags" },
+        { "i8mm",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_I8MM     },    .unit = "flags" },
+        { "sve",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SVE      },    .unit = "flags" },
+        { "sve2",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SVE2     },    .unit = "flags" },
+#elif ARCH_MIPS
+        { "mmi",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMI      },    .unit = "flags" },
+        { "msa",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MSA      },    .unit = "flags" },
+#elif ARCH_LOONGARCH
+        { "lsx",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_LSX      },    .unit = "flags" },
+        { "lasx",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_LASX     },    .unit = "flags" },
+#elif ARCH_RISCV
+        { "rvi",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVI      },    .unit = "flags" },
+        { "rvb",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVB      },    .unit = "flags" },
+        { "zve32x",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVV_I32  },    .unit = "flags" },
+        { "zve32f",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVV_F32  },    .unit = "flags" },
+        { "zve64x",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVV_I64  },    .unit = "flags" },
+        { "zve64d",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVV_F64  },    .unit = "flags" },
+        { "zbb",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVB_BASIC },   .unit = "flags" },
+        { "zvbb",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RV_ZVBB },   .unit = "flags" },
+        { "misaligned", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RV_MISALIGNED },   .unit = "flags" },
+#elif ARCH_WASM
+        { "simd128",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SIMD128  },    .unit = "flags" },
+#endif
+        { NULL },
+    };
+    static const AVClass class = {
+        .class_name = "cpuflags",
+        .item_name  = av_default_item_name,
+        .option     = cpuflags_opts,
+        .version    = LIBAVUTIL_VERSION_INT,
+    };
+    const AVClass *pclass = &class;
+
+    return av_opt_eval_flags(&pclass, &cpuflags_opts[0], s, flags);
+}
+
+int av_cpu_count(void)
+{
+    static atomic_int printed = 0;
+
+    int nb_cpus = 1;
+    int count   = 0;
+#if HAVE_WINRT
+    SYSTEM_INFO sysinfo;
+#endif
+#if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
+    cpu_set_t cpuset;
+
+    CPU_ZERO(&cpuset);
+
+    if (!sched_getaffinity(0, sizeof(cpuset), &cpuset))
+        nb_cpus = CPU_COUNT(&cpuset);
+#elif HAVE_GETPROCESSAFFINITYMASK
+    DWORD_PTR proc_aff, sys_aff;
+    if (GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff))
+        nb_cpus = av_popcount64(proc_aff);
+#elif HAVE_SYSCTL && defined(HW_NCPUONLINE)
+    int mib[2] = { CTL_HW, HW_NCPUONLINE };
+    size_t len = sizeof(nb_cpus);
+
+    if (sysctl(mib, 2, &nb_cpus, &len, NULL, 0) == -1)
+        nb_cpus = 0;
+#elif HAVE_SYSCTL && defined(HW_NCPU)
+    int mib[2] = { CTL_HW, HW_NCPU };
+    size_t len = sizeof(nb_cpus);
+
+    if (sysctl(mib, 2, &nb_cpus, &len, NULL, 0) == -1)
+        nb_cpus = 0;
+#elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN)
+    nb_cpus = sysconf(_SC_NPROC_ONLN);
+#elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
+    nb_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+#elif HAVE_WINRT
+    GetNativeSystemInfo(&sysinfo);
+    nb_cpus = sysinfo.dwNumberOfProcessors;
+#endif
+
+    if (!atomic_exchange_explicit(&printed, 1, memory_order_relaxed))
+        av_log(NULL, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
+
+    count = atomic_load_explicit(&cpu_count, memory_order_relaxed);
+
+    if (count > 0) {
+        nb_cpus = count;
+        av_log(NULL, AV_LOG_DEBUG, "overriding to %d logical cores\n", nb_cpus);
+    }
+
+    return nb_cpus;
+}
+
+void av_cpu_force_count(int count)
+{
+    atomic_store_explicit(&cpu_count, count, memory_order_relaxed);
+}
+
+size_t av_cpu_max_align(void)
+{
+#if ARCH_MIPS
+    return ff_get_cpu_max_align_mips();
+#elif ARCH_AARCH64
+    return ff_get_cpu_max_align_aarch64();
+#elif ARCH_ARM
+    return ff_get_cpu_max_align_arm();
+#elif ARCH_PPC
+    return ff_get_cpu_max_align_ppc();
+#elif ARCH_WASM
+    return ff_get_cpu_max_align_wasm();
+#elif ARCH_X86
+    return ff_get_cpu_max_align_x86();
+#elif ARCH_LOONGARCH
+    return ff_get_cpu_max_align_loongarch();
+#endif
+
+    return 8;
+}
+
+#if !ARCH_X86
+unsigned long ff_getauxval(unsigned long type)
+{
+#if HAVE_GETAUXVAL
+    return getauxval(type);
+#elif HAVE_ELF_AUX_INFO
+    unsigned long aux = 0;
+    int ret = elf_aux_info(type, &aux, sizeof(aux));
+    if (ret != 0) {
+        errno = ret;
+    }
+    return aux;
+#else
+    errno = ENOSYS;
+    return 0;
+#endif
+}
+#endif

ffmpeg/libavutil/cpu.h

@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CPU_H
+#define AVUTIL_CPU_H
+
+#include <stddef.h>
+#include "version.h"
+
+#define AV_CPU_FLAG_FORCE    0x80000000 /* force usage of selected flags (OR) */
+
+    /* lower 16 bits - CPU features */
+#define AV_CPU_FLAG_MMX          0x0001 ///< standard MMX
+#define AV_CPU_FLAG_MMXEXT       0x0002 ///< SSE integer functions or AMD MMX ext
+#define AV_CPU_FLAG_MMX2         0x0002 ///< SSE integer functions or AMD MMX ext
+#define AV_CPU_FLAG_3DNOW        0x0004 ///< AMD 3DNOW
+#define AV_CPU_FLAG_SSE          0x0008 ///< SSE functions
+#define AV_CPU_FLAG_SSE2         0x0010 ///< PIV SSE2 functions
+#define AV_CPU_FLAG_SSE2SLOW 0x40000000 ///< SSE2 supported, but usually not faster
+                                        ///< than regular MMX/SSE (e.g. Core1)
+#define AV_CPU_FLAG_3DNOWEXT     0x0020 ///< AMD 3DNowExt
+#define AV_CPU_FLAG_SSE3         0x0040 ///< Prescott SSE3 functions
+#define AV_CPU_FLAG_SSE3SLOW 0x20000000 ///< SSE3 supported, but usually not faster
+                                        ///< than regular MMX/SSE (e.g. Core1)
+#define AV_CPU_FLAG_SSSE3        0x0080 ///< Conroe SSSE3 functions
+#define AV_CPU_FLAG_SSSE3SLOW 0x4000000 ///< SSSE3 supported, but usually not faster
+#define AV_CPU_FLAG_ATOM     0x10000000 ///< Atom processor, some SSSE3 instructions are slower
+#define AV_CPU_FLAG_SSE4         0x0100 ///< Penryn SSE4.1 functions
+#define AV_CPU_FLAG_SSE42        0x0200 ///< Nehalem SSE4.2 functions
+#define AV_CPU_FLAG_AESNI       0x80000 ///< Advanced Encryption Standard functions
+#define AV_CPU_FLAG_AVX          0x4000 ///< AVX functions: requires OS support even if YMM registers aren't used
+#define AV_CPU_FLAG_AVXSLOW   0x8000000 ///< AVX supported, but slow when using YMM registers (e.g. Bulldozer)
+#define AV_CPU_FLAG_XOP          0x0400 ///< Bulldozer XOP functions
+#define AV_CPU_FLAG_FMA4         0x0800 ///< Bulldozer FMA4 functions
+#define AV_CPU_FLAG_CMOV         0x1000 ///< supports cmov instruction
+#define AV_CPU_FLAG_AVX2         0x8000 ///< AVX2 functions: requires OS support even if YMM registers aren't used
+#define AV_CPU_FLAG_FMA3        0x10000 ///< Haswell FMA3 functions
+#define AV_CPU_FLAG_BMI1        0x20000 ///< Bit Manipulation Instruction Set 1
+#define AV_CPU_FLAG_BMI2        0x40000 ///< Bit Manipulation Instruction Set 2
+#define AV_CPU_FLAG_AVX512     0x100000 ///< AVX-512 functions: requires OS support even if YMM/ZMM registers aren't used
+#define AV_CPU_FLAG_AVX512ICL  0x200000 ///< F/CD/BW/DQ/VL/VNNI/IFMA/VBMI/VBMI2/VPOPCNTDQ/BITALG/GFNI/VAES/VPCLMULQDQ
+#define AV_CPU_FLAG_SLOW_GATHER  0x2000000 ///< CPU has slow gathers.
+
+#define AV_CPU_FLAG_ALTIVEC      0x0001 ///< standard
+#define AV_CPU_FLAG_VSX          0x0002 ///< ISA 2.06
+#define AV_CPU_FLAG_POWER8       0x0004 ///< ISA 2.07
+
+#define AV_CPU_FLAG_ARMV5TE      (1 << 0)
+#define AV_CPU_FLAG_ARMV6        (1 << 1)
+#define AV_CPU_FLAG_ARMV6T2      (1 << 2)
+#define AV_CPU_FLAG_VFP          (1 << 3)
+#define AV_CPU_FLAG_VFPV3        (1 << 4)
+#define AV_CPU_FLAG_NEON         (1 << 5)
+#define AV_CPU_FLAG_ARMV8        (1 << 6)
+#define AV_CPU_FLAG_VFP_VM       (1 << 7) ///< VFPv2 vector mode, deprecated in ARMv7-A and unavailable in various CPUs implementations
+#define AV_CPU_FLAG_DOTPROD      (1 << 8)
+#define AV_CPU_FLAG_I8MM         (1 << 9)
+#define AV_CPU_FLAG_SVE          (1 <<10)
+#define AV_CPU_FLAG_SVE2         (1 <<11)
+#define AV_CPU_FLAG_SETEND       (1 <<16)
+
+#define AV_CPU_FLAG_MMI          (1 << 0)
+#define AV_CPU_FLAG_MSA          (1 << 1)
+
+//Loongarch SIMD extension.
+#define AV_CPU_FLAG_LSX          (1 << 0)
+#define AV_CPU_FLAG_LASX         (1 << 1)
+
+// RISC-V extensions
+#define AV_CPU_FLAG_RVI          (1 << 0) ///< I (full GPR bank)
+#if FF_API_RISCV_FD_ZBA
+#define AV_CPU_FLAG_RVF          (1 << 1) ///< F (single precision FP)
+#define AV_CPU_FLAG_RVD          (1 << 2) ///< D (double precision FP)
+#endif
+#define AV_CPU_FLAG_RVV_I32      (1 << 3) ///< Vectors of 8/16/32-bit int's */
+#define AV_CPU_FLAG_RVV_F32      (1 << 4) ///< Vectors of float's */
+#define AV_CPU_FLAG_RVV_I64      (1 << 5) ///< Vectors of 64-bit int's */
+#define AV_CPU_FLAG_RVV_F64      (1 << 6) ///< Vectors of double's
+#define AV_CPU_FLAG_RVB_BASIC    (1 << 7) ///< Basic bit-manipulations
+#if FF_API_RISCV_FD_ZBA
+#define AV_CPU_FLAG_RVB_ADDR     (1 << 8) ///< Address bit-manipulations
+#endif
+#define AV_CPU_FLAG_RV_ZVBB      (1 << 9) ///< Vector basic bit-manipulations
+#define AV_CPU_FLAG_RV_MISALIGNED (1 <<10) ///< Fast misaligned accesses
+#define AV_CPU_FLAG_RVB          (1 <<11) ///< B (bit manipulations)
+
+// WASM extensions
+#define AV_CPU_FLAG_SIMD128      (1 << 0)
+
+/**
+ * Return the flags which specify extensions supported by the CPU.
+ * The returned value is affected by av_force_cpu_flags() if that was used
+ * before. So av_get_cpu_flags() can easily be used in an application to
+ * detect the enabled cpu flags.
+ */
+int av_get_cpu_flags(void);
+
+/**
+ * Disables cpu detection and forces the specified flags.
+ * -1 is a special case that disables forcing of specific flags.
+ */
+void av_force_cpu_flags(int flags);
+
+/**
+ * Parse CPU caps from a string and update the given AV_CPU_* flags based on that.
+ *
+ * @return negative on error.
+ */
+int av_parse_cpu_caps(unsigned *flags, const char *s);
+
+/**
+ * @return the number of logical CPU cores present.
+ */
+int av_cpu_count(void);
+
+/**
+ * Overrides cpu count detection and forces the specified count.
+ * Count < 1 disables forcing of specific count.
+ */
+void av_cpu_force_count(int count);
+
+/**
+ * Get the maximum data alignment that may be required by FFmpeg.
+ *
+ * Note that this is affected by the build configuration and the CPU flags mask,
+ * so e.g. if the CPU supports AVX, but libavutil has been built with
+ * --disable-avx or the AV_CPU_FLAG_AVX flag has been disabled through
+ *  av_set_cpu_flags_mask(), then this function will behave as if AVX is not
+ *  present.
+ */
+size_t av_cpu_max_align(void);
+
+#endif /* AVUTIL_CPU_H */

ffmpeg/libavutil/cpu_internal.h

@@ -0,0 +1,66 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CPU_INTERNAL_H
+#define AVUTIL_CPU_INTERNAL_H
+
+#include "config.h"
+
+#include "cpu.h"
+
+#define CPUEXT_SUFFIX(flags, suffix, cpuext)                            \
+    (HAVE_ ## cpuext ## suffix && ((flags) & AV_CPU_FLAG_ ## cpuext))
+
+#define CPUEXT_SUFFIX_FAST2(flags, suffix, cpuext, slow_cpuext)         \
+    (HAVE_ ## cpuext ## suffix && ((flags) & AV_CPU_FLAG_ ## cpuext) && \
+     !((flags) & AV_CPU_FLAG_ ## slow_cpuext ## SLOW))
+
+#define CPUEXT_SUFFIX_SLOW(flags, suffix, cpuext)                       \
+    (HAVE_ ## cpuext ## suffix &&                                       \
+     ((flags) & (AV_CPU_FLAG_ ## cpuext | AV_CPU_FLAG_ ## cpuext ## SLOW)))
+
+#define CPUEXT_SUFFIX_SLOW2(flags, suffix, cpuext, slow_cpuext)         \
+    (HAVE_ ## cpuext ## suffix && ((flags) & AV_CPU_FLAG_ ## cpuext) && \
+     ((flags) & (AV_CPU_FLAG_ ## slow_cpuext | AV_CPU_FLAG_ ## slow_cpuext ## SLOW)))
+
+#define CPUEXT_SUFFIX_FAST(flags, suffix, cpuext) CPUEXT_SUFFIX_FAST2(flags, suffix, cpuext, cpuext)
+
+#define CPUEXT(flags, cpuext) CPUEXT_SUFFIX(flags, , cpuext)
+#define CPUEXT_FAST(flags, cpuext) CPUEXT_SUFFIX_FAST(flags, , cpuext)
+#define CPUEXT_SLOW(flags, cpuext) CPUEXT_SUFFIX_SLOW(flags, , cpuext)
+
+int ff_get_cpu_flags_mips(void);
+int ff_get_cpu_flags_aarch64(void);
+int ff_get_cpu_flags_arm(void);
+int ff_get_cpu_flags_ppc(void);
+int ff_get_cpu_flags_riscv(void);
+int ff_get_cpu_flags_wasm(void);
+int ff_get_cpu_flags_x86(void);
+int ff_get_cpu_flags_loongarch(void);
+
+size_t ff_get_cpu_max_align_mips(void);
+size_t ff_get_cpu_max_align_aarch64(void);
+size_t ff_get_cpu_max_align_arm(void);
+size_t ff_get_cpu_max_align_ppc(void);
+size_t ff_get_cpu_max_align_wasm(void);
+size_t ff_get_cpu_max_align_x86(void);
+size_t ff_get_cpu_max_align_loongarch(void);
+
+unsigned long ff_getauxval(unsigned long type);
+
+#endif /* AVUTIL_CPU_INTERNAL_H */

ffmpeg/libavutil/crc.c

@@ -0,0 +1,415 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "thread.h"
+#include "avassert.h"
+#include "bswap.h"
+#include "crc.h"
+#include "error.h"
+
+#if CONFIG_HARDCODED_TABLES
+static const AVCRC av_crc_table[AV_CRC_MAX][257] = {
+    [AV_CRC_8_ATM] = {
+        0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15, 0x38, 0x3F, 0x36, 0x31,
+        0x24, 0x23, 0x2A, 0x2D, 0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65,
+        0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D, 0xE0, 0xE7, 0xEE, 0xE9,
+        0xFC, 0xFB, 0xF2, 0xF5, 0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
+        0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85, 0xA8, 0xAF, 0xA6, 0xA1,
+        0xB4, 0xB3, 0xBA, 0xBD, 0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2,
+        0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA, 0xB7, 0xB0, 0xB9, 0xBE,
+        0xAB, 0xAC, 0xA5, 0xA2, 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
+        0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32, 0x1F, 0x18, 0x11, 0x16,
+        0x03, 0x04, 0x0D, 0x0A, 0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42,
+        0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A, 0x89, 0x8E, 0x87, 0x80,
+        0x95, 0x92, 0x9B, 0x9C, 0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
+        0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC, 0xC1, 0xC6, 0xCF, 0xC8,
+        0xDD, 0xDA, 0xD3, 0xD4, 0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C,
+        0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44, 0x19, 0x1E, 0x17, 0x10,
+        0x05, 0x02, 0x0B, 0x0C, 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
+        0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B, 0x76, 0x71, 0x78, 0x7F,
+        0x6A, 0x6D, 0x64, 0x63, 0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B,
+        0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13, 0xAE, 0xA9, 0xA0, 0xA7,
+        0xB2, 0xB5, 0xBC, 0xBB, 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
+        0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB, 0xE6, 0xE1, 0xE8, 0xEF,
+        0xFA, 0xFD, 0xF4, 0xF3, 0x01
+    },
+    [AV_CRC_8_EBU] = {
+        0x00, 0x1D, 0x3A, 0x27, 0x74, 0x69, 0x4E, 0x53, 0xE8, 0xF5, 0xD2, 0xCF,
+        0x9C, 0x81, 0xA6, 0xBB, 0xCD, 0xD0, 0xF7, 0xEA, 0xB9, 0xA4, 0x83, 0x9E,
+        0x25, 0x38, 0x1F, 0x02, 0x51, 0x4C, 0x6B, 0x76, 0x87, 0x9A, 0xBD, 0xA0,
+        0xF3, 0xEE, 0xC9, 0xD4, 0x6F, 0x72, 0x55, 0x48, 0x1B, 0x06, 0x21, 0x3C,
+        0x4A, 0x57, 0x70, 0x6D, 0x3E, 0x23, 0x04, 0x19, 0xA2, 0xBF, 0x98, 0x85,
+        0xD6, 0xCB, 0xEC, 0xF1, 0x13, 0x0E, 0x29, 0x34, 0x67, 0x7A, 0x5D, 0x40,
+        0xFB, 0xE6, 0xC1, 0xDC, 0x8F, 0x92, 0xB5, 0xA8, 0xDE, 0xC3, 0xE4, 0xF9,
+        0xAA, 0xB7, 0x90, 0x8D, 0x36, 0x2B, 0x0C, 0x11, 0x42, 0x5F, 0x78, 0x65,
+        0x94, 0x89, 0xAE, 0xB3, 0xE0, 0xFD, 0xDA, 0xC7, 0x7C, 0x61, 0x46, 0x5B,
+        0x08, 0x15, 0x32, 0x2F, 0x59, 0x44, 0x63, 0x7E, 0x2D, 0x30, 0x17, 0x0A,
+        0xB1, 0xAC, 0x8B, 0x96, 0xC5, 0xD8, 0xFF, 0xE2, 0x26, 0x3B, 0x1C, 0x01,
+        0x52, 0x4F, 0x68, 0x75, 0xCE, 0xD3, 0xF4, 0xE9, 0xBA, 0xA7, 0x80, 0x9D,
+        0xEB, 0xF6, 0xD1, 0xCC, 0x9F, 0x82, 0xA5, 0xB8, 0x03, 0x1E, 0x39, 0x24,
+        0x77, 0x6A, 0x4D, 0x50, 0xA1, 0xBC, 0x9B, 0x86, 0xD5, 0xC8, 0xEF, 0xF2,
+        0x49, 0x54, 0x73, 0x6E, 0x3D, 0x20, 0x07, 0x1A, 0x6C, 0x71, 0x56, 0x4B,
+        0x18, 0x05, 0x22, 0x3F, 0x84, 0x99, 0xBE, 0xA3, 0xF0, 0xED, 0xCA, 0xD7,
+        0x35, 0x28, 0x0F, 0x12, 0x41, 0x5C, 0x7B, 0x66, 0xDD, 0xC0, 0xE7, 0xFA,
+        0xA9, 0xB4, 0x93, 0x8E, 0xF8, 0xE5, 0xC2, 0xDF, 0x8C, 0x91, 0xB6, 0xAB,
+        0x10, 0x0D, 0x2A, 0x37, 0x64, 0x79, 0x5E, 0x43, 0xB2, 0xAF, 0x88, 0x95,
+        0xC6, 0xDB, 0xFC, 0xE1, 0x5A, 0x47, 0x60, 0x7D, 0x2E, 0x33, 0x14, 0x09,
+        0x7F, 0x62, 0x45, 0x58, 0x0B, 0x16, 0x31, 0x2C, 0x97, 0x8A, 0xAD, 0xB0,
+        0xE3, 0xFE, 0xD9, 0xC4, 0x01
+    },
+    [AV_CRC_16_ANSI] = {
+        0x0000, 0x0580, 0x0F80, 0x0A00, 0x1B80, 0x1E00, 0x1400, 0x1180,
+        0x3380, 0x3600, 0x3C00, 0x3980, 0x2800, 0x2D80, 0x2780, 0x2200,
+        0x6380, 0x6600, 0x6C00, 0x6980, 0x7800, 0x7D80, 0x7780, 0x7200,
+        0x5000, 0x5580, 0x5F80, 0x5A00, 0x4B80, 0x4E00, 0x4400, 0x4180,
+        0xC380, 0xC600, 0xCC00, 0xC980, 0xD800, 0xDD80, 0xD780, 0xD200,
+        0xF000, 0xF580, 0xFF80, 0xFA00, 0xEB80, 0xEE00, 0xE400, 0xE180,
+        0xA000, 0xA580, 0xAF80, 0xAA00, 0xBB80, 0xBE00, 0xB400, 0xB180,
+        0x9380, 0x9600, 0x9C00, 0x9980, 0x8800, 0x8D80, 0x8780, 0x8200,
+        0x8381, 0x8601, 0x8C01, 0x8981, 0x9801, 0x9D81, 0x9781, 0x9201,
+        0xB001, 0xB581, 0xBF81, 0xBA01, 0xAB81, 0xAE01, 0xA401, 0xA181,
+        0xE001, 0xE581, 0xEF81, 0xEA01, 0xFB81, 0xFE01, 0xF401, 0xF181,
+        0xD381, 0xD601, 0xDC01, 0xD981, 0xC801, 0xCD81, 0xC781, 0xC201,
+        0x4001, 0x4581, 0x4F81, 0x4A01, 0x5B81, 0x5E01, 0x5401, 0x5181,
+        0x7381, 0x7601, 0x7C01, 0x7981, 0x6801, 0x6D81, 0x6781, 0x6201,
+        0x2381, 0x2601, 0x2C01, 0x2981, 0x3801, 0x3D81, 0x3781, 0x3201,
+        0x1001, 0x1581, 0x1F81, 0x1A01, 0x0B81, 0x0E01, 0x0401, 0x0181,
+        0x0383, 0x0603, 0x0C03, 0x0983, 0x1803, 0x1D83, 0x1783, 0x1203,
+        0x3003, 0x3583, 0x3F83, 0x3A03, 0x2B83, 0x2E03, 0x2403, 0x2183,
+        0x6003, 0x6583, 0x6F83, 0x6A03, 0x7B83, 0x7E03, 0x7403, 0x7183,
+        0x5383, 0x5603, 0x5C03, 0x5983, 0x4803, 0x4D83, 0x4783, 0x4203,
+        0xC003, 0xC583, 0xCF83, 0xCA03, 0xDB83, 0xDE03, 0xD403, 0xD183,
+        0xF383, 0xF603, 0xFC03, 0xF983, 0xE803, 0xED83, 0xE783, 0xE203,
+        0xA383, 0xA603, 0xAC03, 0xA983, 0xB803, 0xBD83, 0xB783, 0xB203,
+        0x9003, 0x9583, 0x9F83, 0x9A03, 0x8B83, 0x8E03, 0x8403, 0x8183,
+        0x8002, 0x8582, 0x8F82, 0x8A02, 0x9B82, 0x9E02, 0x9402, 0x9182,
+        0xB382, 0xB602, 0xBC02, 0xB982, 0xA802, 0xAD82, 0xA782, 0xA202,
+        0xE382, 0xE602, 0xEC02, 0xE982, 0xF802, 0xFD82, 0xF782, 0xF202,
+        0xD002, 0xD582, 0xDF82, 0xDA02, 0xCB82, 0xCE02, 0xC402, 0xC182,
+        0x4382, 0x4602, 0x4C02, 0x4982, 0x5802, 0x5D82, 0x5782, 0x5202,
+        0x7002, 0x7582, 0x7F82, 0x7A02, 0x6B82, 0x6E02, 0x6402, 0x6182,
+        0x2002, 0x2582, 0x2F82, 0x2A02, 0x3B82, 0x3E02, 0x3402, 0x3182,
+        0x1382, 0x1602, 0x1C02, 0x1982, 0x0802, 0x0D82, 0x0782, 0x0202,
+        0x0001
+    },
+    [AV_CRC_16_CCITT] = {
+        0x0000, 0x2110, 0x4220, 0x6330, 0x8440, 0xA550, 0xC660, 0xE770,
+        0x0881, 0x2991, 0x4AA1, 0x6BB1, 0x8CC1, 0xADD1, 0xCEE1, 0xEFF1,
+        0x3112, 0x1002, 0x7332, 0x5222, 0xB552, 0x9442, 0xF772, 0xD662,
+        0x3993, 0x1883, 0x7BB3, 0x5AA3, 0xBDD3, 0x9CC3, 0xFFF3, 0xDEE3,
+        0x6224, 0x4334, 0x2004, 0x0114, 0xE664, 0xC774, 0xA444, 0x8554,
+        0x6AA5, 0x4BB5, 0x2885, 0x0995, 0xEEE5, 0xCFF5, 0xACC5, 0x8DD5,
+        0x5336, 0x7226, 0x1116, 0x3006, 0xD776, 0xF666, 0x9556, 0xB446,
+        0x5BB7, 0x7AA7, 0x1997, 0x3887, 0xDFF7, 0xFEE7, 0x9DD7, 0xBCC7,
+        0xC448, 0xE558, 0x8668, 0xA778, 0x4008, 0x6118, 0x0228, 0x2338,
+        0xCCC9, 0xEDD9, 0x8EE9, 0xAFF9, 0x4889, 0x6999, 0x0AA9, 0x2BB9,
+        0xF55A, 0xD44A, 0xB77A, 0x966A, 0x711A, 0x500A, 0x333A, 0x122A,
+        0xFDDB, 0xDCCB, 0xBFFB, 0x9EEB, 0x799B, 0x588B, 0x3BBB, 0x1AAB,
+        0xA66C, 0x877C, 0xE44C, 0xC55C, 0x222C, 0x033C, 0x600C, 0x411C,
+        0xAEED, 0x8FFD, 0xECCD, 0xCDDD, 0x2AAD, 0x0BBD, 0x688D, 0x499D,
+        0x977E, 0xB66E, 0xD55E, 0xF44E, 0x133E, 0x322E, 0x511E, 0x700E,
+        0x9FFF, 0xBEEF, 0xDDDF, 0xFCCF, 0x1BBF, 0x3AAF, 0x599F, 0x788F,
+        0x8891, 0xA981, 0xCAB1, 0xEBA1, 0x0CD1, 0x2DC1, 0x4EF1, 0x6FE1,
+        0x8010, 0xA100, 0xC230, 0xE320, 0x0450, 0x2540, 0x4670, 0x6760,
+        0xB983, 0x9893, 0xFBA3, 0xDAB3, 0x3DC3, 0x1CD3, 0x7FE3, 0x5EF3,
+        0xB102, 0x9012, 0xF322, 0xD232, 0x3542, 0x1452, 0x7762, 0x5672,
+        0xEAB5, 0xCBA5, 0xA895, 0x8985, 0x6EF5, 0x4FE5, 0x2CD5, 0x0DC5,
+        0xE234, 0xC324, 0xA014, 0x8104, 0x6674, 0x4764, 0x2454, 0x0544,
+        0xDBA7, 0xFAB7, 0x9987, 0xB897, 0x5FE7, 0x7EF7, 0x1DC7, 0x3CD7,
+        0xD326, 0xF236, 0x9106, 0xB016, 0x5766, 0x7676, 0x1546, 0x3456,
+        0x4CD9, 0x6DC9, 0x0EF9, 0x2FE9, 0xC899, 0xE989, 0x8AB9, 0xABA9,
+        0x4458, 0x6548, 0x0678, 0x2768, 0xC018, 0xE108, 0x8238, 0xA328,
+        0x7DCB, 0x5CDB, 0x3FEB, 0x1EFB, 0xF98B, 0xD89B, 0xBBAB, 0x9ABB,
+        0x754A, 0x545A, 0x376A, 0x167A, 0xF10A, 0xD01A, 0xB32A, 0x923A,
+        0x2EFD, 0x0FED, 0x6CDD, 0x4DCD, 0xAABD, 0x8BAD, 0xE89D, 0xC98D,
+        0x267C, 0x076C, 0x645C, 0x454C, 0xA23C, 0x832C, 0xE01C, 0xC10C,
+        0x1FEF, 0x3EFF, 0x5DCF, 0x7CDF, 0x9BAF, 0xBABF, 0xD98F, 0xF89F,
+        0x176E, 0x367E, 0x554E, 0x745E, 0x932E, 0xB23E, 0xD10E, 0xF01E,
+        0x0001
+    },
+    [AV_CRC_24_IEEE] = {
+        0x000000, 0xFB4C86, 0x0DD58A, 0xF6990C, 0xE1E693, 0x1AAA15, 0xEC3319,
+        0x177F9F, 0x3981A1, 0xC2CD27, 0x34542B, 0xCF18AD, 0xD86732, 0x232BB4,
+        0xD5B2B8, 0x2EFE3E, 0x894EC5, 0x720243, 0x849B4F, 0x7FD7C9, 0x68A856,
+        0x93E4D0, 0x657DDC, 0x9E315A, 0xB0CF64, 0x4B83E2, 0xBD1AEE, 0x465668,
+        0x5129F7, 0xAA6571, 0x5CFC7D, 0xA7B0FB, 0xE9D10C, 0x129D8A, 0xE40486,
+        0x1F4800, 0x08379F, 0xF37B19, 0x05E215, 0xFEAE93, 0xD050AD, 0x2B1C2B,
+        0xDD8527, 0x26C9A1, 0x31B63E, 0xCAFAB8, 0x3C63B4, 0xC72F32, 0x609FC9,
+        0x9BD34F, 0x6D4A43, 0x9606C5, 0x81795A, 0x7A35DC, 0x8CACD0, 0x77E056,
+        0x591E68, 0xA252EE, 0x54CBE2, 0xAF8764, 0xB8F8FB, 0x43B47D, 0xB52D71,
+        0x4E61F7, 0xD2A319, 0x29EF9F, 0xDF7693, 0x243A15, 0x33458A, 0xC8090C,
+        0x3E9000, 0xC5DC86, 0xEB22B8, 0x106E3E, 0xE6F732, 0x1DBBB4, 0x0AC42B,
+        0xF188AD, 0x0711A1, 0xFC5D27, 0x5BEDDC, 0xA0A15A, 0x563856, 0xAD74D0,
+        0xBA0B4F, 0x4147C9, 0xB7DEC5, 0x4C9243, 0x626C7D, 0x9920FB, 0x6FB9F7,
+        0x94F571, 0x838AEE, 0x78C668, 0x8E5F64, 0x7513E2, 0x3B7215, 0xC03E93,
+        0x36A79F, 0xCDEB19, 0xDA9486, 0x21D800, 0xD7410C, 0x2C0D8A, 0x02F3B4,
+        0xF9BF32, 0x0F263E, 0xF46AB8, 0xE31527, 0x1859A1, 0xEEC0AD, 0x158C2B,
+        0xB23CD0, 0x497056, 0xBFE95A, 0x44A5DC, 0x53DA43, 0xA896C5, 0x5E0FC9,
+        0xA5434F, 0x8BBD71, 0x70F1F7, 0x8668FB, 0x7D247D, 0x6A5BE2, 0x911764,
+        0x678E68, 0x9CC2EE, 0xA44733, 0x5F0BB5, 0xA992B9, 0x52DE3F, 0x45A1A0,
+        0xBEED26, 0x48742A, 0xB338AC, 0x9DC692, 0x668A14, 0x901318, 0x6B5F9E,
+        0x7C2001, 0x876C87, 0x71F58B, 0x8AB90D, 0x2D09F6, 0xD64570, 0x20DC7C,
+        0xDB90FA, 0xCCEF65, 0x37A3E3, 0xC13AEF, 0x3A7669, 0x148857, 0xEFC4D1,
+        0x195DDD, 0xE2115B, 0xF56EC4, 0x0E2242, 0xF8BB4E, 0x03F7C8, 0x4D963F,
+        0xB6DAB9, 0x4043B5, 0xBB0F33, 0xAC70AC, 0x573C2A, 0xA1A526, 0x5AE9A0,
+        0x74179E, 0x8F5B18, 0x79C214, 0x828E92, 0x95F10D, 0x6EBD8B, 0x982487,
+        0x636801, 0xC4D8FA, 0x3F947C, 0xC90D70, 0x3241F6, 0x253E69, 0xDE72EF,
+        0x28EBE3, 0xD3A765, 0xFD595B, 0x0615DD, 0xF08CD1, 0x0BC057, 0x1CBFC8,
+        0xE7F34E, 0x116A42, 0xEA26C4, 0x76E42A, 0x8DA8AC, 0x7B31A0, 0x807D26,
+        0x9702B9, 0x6C4E3F, 0x9AD733, 0x619BB5, 0x4F658B, 0xB4290D, 0x42B001,
+        0xB9FC87, 0xAE8318, 0x55CF9E, 0xA35692, 0x581A14, 0xFFAAEF, 0x04E669,
+        0xF27F65, 0x0933E3, 0x1E4C7C, 0xE500FA, 0x1399F6, 0xE8D570, 0xC62B4E,
+        0x3D67C8, 0xCBFEC4, 0x30B242, 0x27CDDD, 0xDC815B, 0x2A1857, 0xD154D1,
+        0x9F3526, 0x6479A0, 0x92E0AC, 0x69AC2A, 0x7ED3B5, 0x859F33, 0x73063F,
+        0x884AB9, 0xA6B487, 0x5DF801, 0xAB610D, 0x502D8B, 0x475214, 0xBC1E92,
+        0x4A879E, 0xB1CB18, 0x167BE3, 0xED3765, 0x1BAE69, 0xE0E2EF, 0xF79D70,
+        0x0CD1F6, 0xFA48FA, 0x01047C, 0x2FFA42, 0xD4B6C4, 0x222FC8, 0xD9634E,
+        0xCE1CD1, 0x355057, 0xC3C95B, 0x3885DD, 0x000001,
+    },
+    [AV_CRC_32_IEEE] = {
+        0x00000000, 0xB71DC104, 0x6E3B8209, 0xD926430D, 0xDC760413, 0x6B6BC517,
+        0xB24D861A, 0x0550471E, 0xB8ED0826, 0x0FF0C922, 0xD6D68A2F, 0x61CB4B2B,
+        0x649B0C35, 0xD386CD31, 0x0AA08E3C, 0xBDBD4F38, 0x70DB114C, 0xC7C6D048,
+        0x1EE09345, 0xA9FD5241, 0xACAD155F, 0x1BB0D45B, 0xC2969756, 0x758B5652,
+        0xC836196A, 0x7F2BD86E, 0xA60D9B63, 0x11105A67, 0x14401D79, 0xA35DDC7D,
+        0x7A7B9F70, 0xCD665E74, 0xE0B62398, 0x57ABE29C, 0x8E8DA191, 0x39906095,
+        0x3CC0278B, 0x8BDDE68F, 0x52FBA582, 0xE5E66486, 0x585B2BBE, 0xEF46EABA,
+        0x3660A9B7, 0x817D68B3, 0x842D2FAD, 0x3330EEA9, 0xEA16ADA4, 0x5D0B6CA0,
+        0x906D32D4, 0x2770F3D0, 0xFE56B0DD, 0x494B71D9, 0x4C1B36C7, 0xFB06F7C3,
+        0x2220B4CE, 0x953D75CA, 0x28803AF2, 0x9F9DFBF6, 0x46BBB8FB, 0xF1A679FF,
+        0xF4F63EE1, 0x43EBFFE5, 0x9ACDBCE8, 0x2DD07DEC, 0x77708634, 0xC06D4730,
+        0x194B043D, 0xAE56C539, 0xAB068227, 0x1C1B4323, 0xC53D002E, 0x7220C12A,
+        0xCF9D8E12, 0x78804F16, 0xA1A60C1B, 0x16BBCD1F, 0x13EB8A01, 0xA4F64B05,
+        0x7DD00808, 0xCACDC90C, 0x07AB9778, 0xB0B6567C, 0x69901571, 0xDE8DD475,
+        0xDBDD936B, 0x6CC0526F, 0xB5E61162, 0x02FBD066, 0xBF469F5E, 0x085B5E5A,
+        0xD17D1D57, 0x6660DC53, 0x63309B4D, 0xD42D5A49, 0x0D0B1944, 0xBA16D840,
+        0x97C6A5AC, 0x20DB64A8, 0xF9FD27A5, 0x4EE0E6A1, 0x4BB0A1BF, 0xFCAD60BB,
+        0x258B23B6, 0x9296E2B2, 0x2F2BAD8A, 0x98366C8E, 0x41102F83, 0xF60DEE87,
+        0xF35DA999, 0x4440689D, 0x9D662B90, 0x2A7BEA94, 0xE71DB4E0, 0x500075E4,
+        0x892636E9, 0x3E3BF7ED, 0x3B6BB0F3, 0x8C7671F7, 0x555032FA, 0xE24DF3FE,
+        0x5FF0BCC6, 0xE8ED7DC2, 0x31CB3ECF, 0x86D6FFCB, 0x8386B8D5, 0x349B79D1,
+        0xEDBD3ADC, 0x5AA0FBD8, 0xEEE00C69, 0x59FDCD6D, 0x80DB8E60, 0x37C64F64,
+        0x3296087A, 0x858BC97E, 0x5CAD8A73, 0xEBB04B77, 0x560D044F, 0xE110C54B,
+        0x38368646, 0x8F2B4742, 0x8A7B005C, 0x3D66C158, 0xE4408255, 0x535D4351,
+        0x9E3B1D25, 0x2926DC21, 0xF0009F2C, 0x471D5E28, 0x424D1936, 0xF550D832,
+        0x2C769B3F, 0x9B6B5A3B, 0x26D61503, 0x91CBD407, 0x48ED970A, 0xFFF0560E,
+        0xFAA01110, 0x4DBDD014, 0x949B9319, 0x2386521D, 0x0E562FF1, 0xB94BEEF5,
+        0x606DADF8, 0xD7706CFC, 0xD2202BE2, 0x653DEAE6, 0xBC1BA9EB, 0x0B0668EF,
+        0xB6BB27D7, 0x01A6E6D3, 0xD880A5DE, 0x6F9D64DA, 0x6ACD23C4, 0xDDD0E2C0,
+        0x04F6A1CD, 0xB3EB60C9, 0x7E8D3EBD, 0xC990FFB9, 0x10B6BCB4, 0xA7AB7DB0,
+        0xA2FB3AAE, 0x15E6FBAA, 0xCCC0B8A7, 0x7BDD79A3, 0xC660369B, 0x717DF79F,
+        0xA85BB492, 0x1F467596, 0x1A163288, 0xAD0BF38C, 0x742DB081, 0xC3307185,
+        0x99908A5D, 0x2E8D4B59, 0xF7AB0854, 0x40B6C950, 0x45E68E4E, 0xF2FB4F4A,
+        0x2BDD0C47, 0x9CC0CD43, 0x217D827B, 0x9660437F, 0x4F460072, 0xF85BC176,
+        0xFD0B8668, 0x4A16476C, 0x93300461, 0x242DC565, 0xE94B9B11, 0x5E565A15,
+        0x87701918, 0x306DD81C, 0x353D9F02, 0x82205E06, 0x5B061D0B, 0xEC1BDC0F,
+        0x51A69337, 0xE6BB5233, 0x3F9D113E, 0x8880D03A, 0x8DD09724, 0x3ACD5620,
+        0xE3EB152D, 0x54F6D429, 0x7926A9C5, 0xCE3B68C1, 0x171D2BCC, 0xA000EAC8,
+        0xA550ADD6, 0x124D6CD2, 0xCB6B2FDF, 0x7C76EEDB, 0xC1CBA1E3, 0x76D660E7,
+        0xAFF023EA, 0x18EDE2EE, 0x1DBDA5F0, 0xAAA064F4, 0x738627F9, 0xC49BE6FD,
+        0x09FDB889, 0xBEE0798D, 0x67C63A80, 0xD0DBFB84, 0xD58BBC9A, 0x62967D9E,
+        0xBBB03E93, 0x0CADFF97, 0xB110B0AF, 0x060D71AB, 0xDF2B32A6, 0x6836F3A2,
+        0x6D66B4BC, 0xDA7B75B8, 0x035D36B5, 0xB440F7B1, 0x00000001
+    },
+    [AV_CRC_32_IEEE_LE] = {
+        0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
+        0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
+        0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
+        0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
+        0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
+        0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
+        0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
+        0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
+        0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
+        0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
+        0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106,
+        0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
+        0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D,
+        0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
+        0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
+        0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
+        0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7,
+        0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
+        0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA,
+        0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
+        0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
+        0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
+        0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
+        0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
+        0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
+        0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
+        0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E,
+        0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
+        0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55,
+        0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
+        0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28,
+        0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
+        0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F,
+        0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
+        0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
+        0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
+        0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
+        0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
+        0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC,
+        0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
+        0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
+        0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
+        0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D, 0x00000001
+    },
+    [AV_CRC_16_ANSI_LE] = {
+        0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
+        0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
+        0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
+        0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
+        0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
+        0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
+        0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
+        0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
+        0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
+        0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
+        0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
+        0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
+        0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
+        0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
+        0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
+        0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
+        0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
+        0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
+        0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
+        0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
+        0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
+        0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
+        0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
+        0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
+        0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
+        0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
+        0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
+        0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
+        0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
+        0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
+        0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
+        0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040,
+        0x0001
+    },
+};
+#else
+#if CONFIG_SMALL
+#define CRC_TABLE_SIZE 257
+#else
+#define CRC_TABLE_SIZE 1024
+#endif
+static AVCRC av_crc_table[AV_CRC_MAX][CRC_TABLE_SIZE];
+
+#define DECLARE_CRC_INIT_TABLE_ONCE(id, le, bits, poly)                                       \
+static AVOnce id ## _once_control = AV_ONCE_INIT;                                             \
+static void id ## _init_table_once(void)                                                      \
+{                                                                                             \
+    av_assert0(av_crc_init(av_crc_table[id], le, bits, poly, sizeof(av_crc_table[id])) >= 0); \
+}
+
+#define CRC_INIT_TABLE_ONCE(id) ff_thread_once(&id ## _once_control, id ## _init_table_once)
+
+DECLARE_CRC_INIT_TABLE_ONCE(AV_CRC_8_ATM,      0,  8,       0x07)
+DECLARE_CRC_INIT_TABLE_ONCE(AV_CRC_8_EBU,      0,  8,       0x1D)
+DECLARE_CRC_INIT_TABLE_ONCE(AV_CRC_16_ANSI,    0, 16,     0x8005)
+DECLARE_CRC_INIT_TABLE_ONCE(AV_CRC_16_CCITT,   0, 16,     0x1021)
+DECLARE_CRC_INIT_TABLE_ONCE(AV_CRC_24_IEEE,    0, 24,   0x864CFB)
+DECLARE_CRC_INIT_TABLE_ONCE(AV_CRC_32_IEEE,    0, 32, 0x04C11DB7)
+DECLARE_CRC_INIT_TABLE_ONCE(AV_CRC_32_IEEE_LE, 1, 32, 0xEDB88320)
+DECLARE_CRC_INIT_TABLE_ONCE(AV_CRC_16_ANSI_LE, 1, 16,     0xA001)
+#endif
+
+int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size)
+{
+    unsigned i, j;
+    uint32_t c;
+
+    if (bits < 8 || bits > 32 || poly >= (1LL << bits))
+        return AVERROR(EINVAL);
+    if (ctx_size != sizeof(AVCRC) * 257 && ctx_size != sizeof(AVCRC) * 1024)
+        return AVERROR(EINVAL);
+
+    for (i = 0; i < 256; i++) {
+        if (le) {
+            for (c = i, j = 0; j < 8; j++)
+                c = (c >> 1) ^ (poly & (-(c & 1)));
+            ctx[i] = c;
+        } else {
+            for (c = i << 24, j = 0; j < 8; j++)
+                c = (c << 1) ^ ((poly << (32 - bits)) & (((int32_t) c) >> 31));
+            ctx[i] = av_bswap32(c);
+        }
+    }
+    ctx[256] = 1;
+#if !CONFIG_SMALL
+    if (ctx_size >= sizeof(AVCRC) * 1024)
+        for (i = 0; i < 256; i++)
+            for (j = 0; j < 3; j++)
+                ctx[256 * (j + 1) + i] =
+                    (ctx[256 * j + i] >> 8) ^ ctx[ctx[256 * j + i] & 0xFF];
+#endif
+
+    return 0;
+}
+
+const AVCRC *av_crc_get_table(AVCRCId crc_id)
+{
+#if !CONFIG_HARDCODED_TABLES
+    switch (crc_id) {
+    case AV_CRC_8_ATM:      CRC_INIT_TABLE_ONCE(AV_CRC_8_ATM); break;
+    case AV_CRC_8_EBU:      CRC_INIT_TABLE_ONCE(AV_CRC_8_EBU); break;
+    case AV_CRC_16_ANSI:    CRC_INIT_TABLE_ONCE(AV_CRC_16_ANSI); break;
+    case AV_CRC_16_CCITT:   CRC_INIT_TABLE_ONCE(AV_CRC_16_CCITT); break;
+    case AV_CRC_24_IEEE:    CRC_INIT_TABLE_ONCE(AV_CRC_24_IEEE); break;
+    case AV_CRC_32_IEEE:    CRC_INIT_TABLE_ONCE(AV_CRC_32_IEEE); break;
+    case AV_CRC_32_IEEE_LE: CRC_INIT_TABLE_ONCE(AV_CRC_32_IEEE_LE); break;
+    case AV_CRC_16_ANSI_LE: CRC_INIT_TABLE_ONCE(AV_CRC_16_ANSI_LE); break;
+    default: av_assert0(0);
+    }
+#endif
+    return av_crc_table[crc_id];
+}
+
+uint32_t av_crc(const AVCRC *ctx, uint32_t crc,
+                const uint8_t *buffer, size_t length)
+{
+    const uint8_t *end = buffer + length;
+
+#if !CONFIG_SMALL
+    if (!ctx[256]) {
+        while (((intptr_t) buffer & 3) && buffer < end)
+            crc = ctx[((uint8_t) crc) ^ *buffer++] ^ (crc >> 8);
+
+        while (buffer < end - 3) {
+            crc ^= av_le2ne32(*(const uint32_t *) buffer); buffer += 4;
+            crc = ctx[3 * 256 + ( crc        & 0xFF)] ^
+                  ctx[2 * 256 + ((crc >> 8 ) & 0xFF)] ^
+                  ctx[1 * 256 + ((crc >> 16) & 0xFF)] ^
+                  ctx[0 * 256 + ((crc >> 24)       )];
+        }
+    }
+#endif
+    while (buffer < end)
+        crc = ctx[((uint8_t) crc) ^ *buffer++] ^ (crc >> 8);
+
+    return crc;
+}

ffmpeg/libavutil/crc.h

@@ -0,0 +1,102 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_crc32
+ * Public header for CRC hash function implementation.
+ */
+
+#ifndef AVUTIL_CRC_H
+#define AVUTIL_CRC_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include "attributes.h"
+
+/**
+ * @defgroup lavu_crc32 CRC
+ * @ingroup lavu_hash
+ * CRC (Cyclic Redundancy Check) hash function implementation.
+ *
+ * This module supports numerous CRC polynomials, in addition to the most
+ * widely used CRC-32-IEEE. See @ref AVCRCId for a list of available
+ * polynomials.
+ *
+ * @{
+ */
+
+typedef uint32_t AVCRC;
+
+typedef enum {
+    AV_CRC_8_ATM,
+    AV_CRC_16_ANSI,
+    AV_CRC_16_CCITT,
+    AV_CRC_32_IEEE,
+    AV_CRC_32_IEEE_LE,  /*< reversed bitorder version of AV_CRC_32_IEEE */
+    AV_CRC_16_ANSI_LE,  /*< reversed bitorder version of AV_CRC_16_ANSI */
+    AV_CRC_24_IEEE,
+    AV_CRC_8_EBU,
+    AV_CRC_MAX,         /*< Not part of public API! Do not use outside libavutil. */
+}AVCRCId;
+
+/**
+ * Initialize a CRC table.
+ * @param ctx must be an array of size sizeof(AVCRC)*257 or sizeof(AVCRC)*1024
+ * @param le If 1, the lowest bit represents the coefficient for the highest
+ *           exponent of the corresponding polynomial (both for poly and
+ *           actual CRC).
+ *           If 0, you must swap the CRC parameter and the result of av_crc
+ *           if you need the standard representation (can be simplified in
+ *           most cases to e.g. bswap16):
+ *           av_bswap32(crc << (32-bits))
+ * @param bits number of bits for the CRC
+ * @param poly generator polynomial without the x**bits coefficient, in the
+ *             representation as specified by le
+ * @param ctx_size size of ctx in bytes
+ * @return <0 on failure
+ */
+int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);
+
+/**
+ * Get an initialized standard CRC table.
+ * @param crc_id ID of a standard CRC
+ * @return a pointer to the CRC table or NULL on failure
+ */
+const AVCRC *av_crc_get_table(AVCRCId crc_id);
+
+/**
+ * Calculate the CRC of a block.
+ * @param ctx initialized AVCRC array (see av_crc_init())
+ * @param crc CRC of previous blocks if any or initial value for CRC
+ * @param buffer buffer whose CRC to calculate
+ * @param length length of the buffer
+ * @return CRC updated with the data from the given block
+ *
+ * @see av_crc_init() "le" parameter
+ */
+uint32_t av_crc(const AVCRC *ctx, uint32_t crc,
+                const uint8_t *buffer, size_t length) av_pure;
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_CRC_H */

ffmpeg/libavutil/csp.c

@@ -0,0 +1,636 @@
+/*
+ * Copyright (c) 2015 Kevin Wheatley <kevin.j.wheatley@gmail.com>
+ * Copyright (c) 2016 Ronald S. Bultje <rsbultje@gmail.com>
+ * Copyright (c) 2023 Leo Izen <leo.izen@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file Colorspace functions for libavutil
+ * @author Ronald S. Bultje <rsbultje@gmail.com>
+ * @author Leo Izen <leo.izen@gmail.com>
+ * @author Kevin Wheatley <kevin.j.wheatley@gmail.com>
+ */
+
+#include <stdlib.h>
+#include <math.h>
+
+#include "attributes.h"
+#include "csp.h"
+#include "pixfmt.h"
+#include "rational.h"
+
+#define AVR(d) { (int)(d * 100000 + 0.5), 100000 }
+
+/*
+ * All constants explained in e.g. https://linuxtv.org/downloads/v4l-dvb-apis/ch02s06.html
+ * The older ones (bt470bg/m) are also explained in their respective ITU docs
+ * (e.g. https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.470-5-199802-S!!PDF-E.pdf)
+ * whereas the newer ones can typically be copied directly from wikipedia :)
+ */
+static const struct AVLumaCoefficients luma_coefficients[AVCOL_SPC_NB] = {
+    [AVCOL_SPC_FCC]        = { AVR(0.30),   AVR(0.59),   AVR(0.11)   },
+    [AVCOL_SPC_BT470BG]    = { AVR(0.299),  AVR(0.587),  AVR(0.114)  },
+    [AVCOL_SPC_SMPTE170M]  = { AVR(0.299),  AVR(0.587),  AVR(0.114)  },
+    [AVCOL_SPC_BT709]      = { AVR(0.2126), AVR(0.7152), AVR(0.0722) },
+    [AVCOL_SPC_SMPTE240M]  = { AVR(0.212),  AVR(0.701),  AVR(0.087)  },
+    [AVCOL_SPC_YCOCG]      = { AVR(0.25),   AVR(0.5),    AVR(0.25)   },
+    [AVCOL_SPC_RGB]        = { AVR(1),      AVR(1),      AVR(1)      },
+    [AVCOL_SPC_BT2020_NCL] = { AVR(0.2627), AVR(0.6780), AVR(0.0593) },
+    [AVCOL_SPC_BT2020_CL]  = { AVR(0.2627), AVR(0.6780), AVR(0.0593) },
+};
+
+const struct AVLumaCoefficients *av_csp_luma_coeffs_from_avcsp(enum AVColorSpace csp)
+{
+    const AVLumaCoefficients *coeffs;
+
+    if ((unsigned)csp >= AVCOL_SPC_NB)
+        return NULL;
+    coeffs = &luma_coefficients[csp];
+    if (!coeffs->cr.num)
+        return NULL;
+
+    return coeffs;
+}
+
+#define WP_D65 { AVR(0.3127), AVR(0.3290) }
+#define WP_C   { AVR(0.3100), AVR(0.3160) }
+#define WP_DCI { AVR(0.3140), AVR(0.3510) }
+#define WP_E   { {1, 3}, {1, 3} }
+
+static const AVColorPrimariesDesc color_primaries[AVCOL_PRI_NB] = {
+    [AVCOL_PRI_BT709]     = { WP_D65, { { AVR(0.640), AVR(0.330) }, { AVR(0.300), AVR(0.600) }, { AVR(0.150), AVR(0.060) } } },
+    [AVCOL_PRI_BT470M]    = { WP_C,   { { AVR(0.670), AVR(0.330) }, { AVR(0.210), AVR(0.710) }, { AVR(0.140), AVR(0.080) } } },
+    [AVCOL_PRI_BT470BG]   = { WP_D65, { { AVR(0.640), AVR(0.330) }, { AVR(0.290), AVR(0.600) }, { AVR(0.150), AVR(0.060) } } },
+    [AVCOL_PRI_SMPTE170M] = { WP_D65, { { AVR(0.630), AVR(0.340) }, { AVR(0.310), AVR(0.595) }, { AVR(0.155), AVR(0.070) } } },
+    [AVCOL_PRI_SMPTE240M] = { WP_D65, { { AVR(0.630), AVR(0.340) }, { AVR(0.310), AVR(0.595) }, { AVR(0.155), AVR(0.070) } } },
+    [AVCOL_PRI_SMPTE428]  = { WP_E,   { { AVR(0.735), AVR(0.265) }, { AVR(0.274), AVR(0.718) }, { AVR(0.167), AVR(0.009) } } },
+    [AVCOL_PRI_SMPTE431]  = { WP_DCI, { { AVR(0.680), AVR(0.320) }, { AVR(0.265), AVR(0.690) }, { AVR(0.150), AVR(0.060) } } },
+    [AVCOL_PRI_SMPTE432]  = { WP_D65, { { AVR(0.680), AVR(0.320) }, { AVR(0.265), AVR(0.690) }, { AVR(0.150), AVR(0.060) } } },
+    [AVCOL_PRI_FILM]      = { WP_C,   { { AVR(0.681), AVR(0.319) }, { AVR(0.243), AVR(0.692) }, { AVR(0.145), AVR(0.049) } } },
+    [AVCOL_PRI_BT2020]    = { WP_D65, { { AVR(0.708), AVR(0.292) }, { AVR(0.170), AVR(0.797) }, { AVR(0.131), AVR(0.046) } } },
+    [AVCOL_PRI_JEDEC_P22] = { WP_D65, { { AVR(0.630), AVR(0.340) }, { AVR(0.295), AVR(0.605) }, { AVR(0.155), AVR(0.077) } } },
+};
+
+const AVColorPrimariesDesc *av_csp_primaries_desc_from_id(enum AVColorPrimaries prm)
+{
+    const AVColorPrimariesDesc *p;
+
+    if ((unsigned)prm >= AVCOL_PRI_NB)
+        return NULL;
+    p = &color_primaries[prm];
+    if (!p->prim.r.x.num)
+        return NULL;
+
+    return p;
+}
+
+static av_always_inline AVRational abs_sub_q(AVRational r1, AVRational r2)
+{
+    AVRational diff = av_sub_q(r1, r2);
+    /* denominator assumed to be positive */
+    return av_make_q(abs(diff.num), diff.den);
+}
+
+enum AVColorPrimaries av_csp_primaries_id_from_desc(const AVColorPrimariesDesc *prm)
+{
+    AVRational delta;
+
+    for (enum AVColorPrimaries p = 0; p < AVCOL_PRI_NB; p++) {
+        const AVColorPrimariesDesc *ref = &color_primaries[p];
+        if (!ref->prim.r.x.num)
+            continue;
+
+        delta = abs_sub_q(prm->prim.r.x, ref->prim.r.x);
+        delta = av_add_q(delta, abs_sub_q(prm->prim.r.y, ref->prim.r.y));
+        delta = av_add_q(delta, abs_sub_q(prm->prim.g.x, ref->prim.g.x));
+        delta = av_add_q(delta, abs_sub_q(prm->prim.g.y, ref->prim.g.y));
+        delta = av_add_q(delta, abs_sub_q(prm->prim.b.x, ref->prim.b.x));
+        delta = av_add_q(delta, abs_sub_q(prm->prim.b.y, ref->prim.b.y));
+        delta = av_add_q(delta, abs_sub_q(prm->wp.x, ref->wp.x));
+        delta = av_add_q(delta, abs_sub_q(prm->wp.y, ref->wp.y));
+
+        if (av_cmp_q(delta, av_make_q(1, 1000)) < 0)
+            return p;
+    }
+
+    return AVCOL_PRI_UNSPECIFIED;
+}
+
+static const double approximate_gamma[AVCOL_TRC_NB] = {
+    [AVCOL_TRC_BT709] = 1.961,
+    [AVCOL_TRC_SMPTE170M] = 1.961,
+    [AVCOL_TRC_SMPTE240M] = 1.961,
+    [AVCOL_TRC_BT1361_ECG] = 1.961,
+    [AVCOL_TRC_BT2020_10] = 1.961,
+    [AVCOL_TRC_BT2020_12] = 1.961,
+    [AVCOL_TRC_GAMMA22] = 2.2,
+    [AVCOL_TRC_IEC61966_2_1] = 2.2,
+    [AVCOL_TRC_GAMMA28] = 2.8,
+    [AVCOL_TRC_LINEAR] = 1.0,
+    [AVCOL_TRC_SMPTE428] = 2.6,
+};
+
+double av_csp_approximate_trc_gamma(enum AVColorTransferCharacteristic trc)
+{
+    double gamma;
+    if ((unsigned)trc >= AVCOL_TRC_NB)
+        return 0.0;
+    gamma = approximate_gamma[trc];
+    if (gamma > 0)
+        return gamma;
+    return 0.0;
+}
+
+#define BT709_alpha 1.099296826809442
+#define BT709_beta 0.018053968510807
+
+static double trc_bt709(double Lc)
+{
+    const double a = BT709_alpha;
+    const double b = BT709_beta;
+
+    return (0.0 > Lc) ? 0.0
+         : (  b > Lc) ? 4.500 * Lc
+         :              a * pow(Lc, 0.45) - (a - 1.0);
+}
+
+static double trc_bt709_inv(double E)
+{
+    const double a = BT709_alpha;
+    const double b = 4.500 * BT709_beta;
+
+    return (0.0 > E) ? 0.0
+         : (  b > E) ? E / 4.500
+         :             pow((E + (a - 1.0)) / a, 1.0 / 0.45);
+}
+
+static double trc_gamma22(double Lc)
+{
+    return (0.0 > Lc) ? 0.0 : pow(Lc, 1.0/ 2.2);
+}
+
+static double trc_gamma22_inv(double E)
+{
+    return (0.0 > E) ? 0.0 : pow(E, 2.2);
+}
+
+static double trc_gamma28(double Lc)
+{
+    return (0.0 > Lc) ? 0.0 : pow(Lc, 1.0/ 2.8);
+}
+
+static double trc_gamma28_inv(double E)
+{
+    return (0.0 > E) ? 0.0 : pow(E, 2.8);
+}
+
+static double trc_smpte240M(double Lc)
+{
+    const double a = 1.1115;
+    const double b = 0.0228;
+
+    return (0.0 > Lc) ? 0.0
+         : (  b > Lc) ? 4.000 * Lc
+         :              a * pow(Lc, 0.45) - (a - 1.0);
+}
+
+static double trc_smpte240M_inv(double E)
+{
+    const double a = 1.1115;
+    const double b = 4.000 * 0.0228;
+
+    return (0.0 > E) ? 0.0
+         : (  b > E) ? E / 4.000
+         :             pow((E + (a - 1.0)) / a, 1.0 / 0.45);
+}
+
+static double trc_linear(double Lc)
+{
+    return Lc;
+}
+
+static double trc_log(double Lc)
+{
+    return (0.01 > Lc) ? 0.0 : 1.0 + log10(Lc) / 2.0;
+}
+
+static double trc_log_inv(double E)
+{
+    return (0.0 > E) ? 0.01 : pow(10.0, 2.0 * (E - 1.0));
+}
+
+static double trc_log_sqrt(double Lc)
+{
+    // sqrt(10) / 1000
+    return (0.00316227766 > Lc) ? 0.0 : 1.0 + log10(Lc) / 2.5;
+}
+
+static double trc_log_sqrt_inv(double E)
+{
+    return (0.0 > E) ? 0.00316227766 : pow(10.0, 2.5 * (E - 1.0));
+}
+
+static double trc_iec61966_2_4(double Lc)
+{
+    const double a = BT709_alpha;
+    const double b = BT709_beta;
+
+    return (-b >= Lc) ? -a * pow(-Lc, 0.45) + (a - 1.0)
+         : ( b >  Lc) ? 4.500 * Lc
+         :               a * pow( Lc, 0.45) - (a - 1.0);
+}
+
+static double trc_iec61966_2_4_inv(double E)
+{
+    const double a = BT709_alpha;
+    const double b = 4.500 * BT709_beta;
+
+    return (-b >= E) ? -pow((-E + (a - 1.0)) / a, 1.0 / 0.45)
+         : ( b >  E) ? E / 4.500
+         :              pow(( E + (a - 1.0)) / a, 1.0 / 0.45);
+}
+
+static double trc_bt1361(double Lc)
+{
+    const double a = BT709_alpha;
+    const double b = BT709_beta;
+
+    return (-0.0045 >= Lc) ? -(a * pow(-4.0 * Lc, 0.45) + (a - 1.0)) / 4.0
+         : ( b >  Lc) ? 4.500 * Lc
+         :               a * pow( Lc, 0.45) - (a - 1.0);
+}
+
+static double trc_bt1361_inv(double E)
+{
+    const double a = BT709_alpha;
+    const double b = 4.500 * BT709_beta;
+
+    return (-0.02025 >= E) ? -pow((-4.0 * E - (a - 1.0)) / a, 1.0 / 0.45) / 4.0
+         : ( b       >  E) ? E / 4.500
+         :                    pow(( E + (a - 1.0)) / a, 1.0 / 0.45);
+}
+
+static double trc_iec61966_2_1(double Lc)
+{
+    const double a = 1.055;
+    const double b = 0.0031308;
+
+    return (0.0 > Lc) ? 0.0
+         : (  b > Lc) ? 12.92 * Lc
+         :              a * pow(Lc, 1.0  / 2.4) - (a - 1.0);
+}
+
+static double trc_iec61966_2_1_inv(double E)
+{
+    const double a = 1.055;
+    const double b = 12.92 * 0.0031308;
+
+    return (0.0 > E) ? 0.0
+         : (  b > E) ? E / 12.92
+                     : pow((E + (a - 1.0)) / a, 2.4);
+    return E;
+}
+
+#define PQ_c1 (        3424.0 / 4096.0) /* c3-c2 + 1 */
+#define PQ_c2 ( 32.0 * 2413.0 / 4096.0)
+#define PQ_c3 ( 32.0 * 2392.0 / 4096.0)
+#define PQ_m  (128.0 * 2523.0 / 4096.0)
+#define PQ_n  ( 0.25 * 2610.0 / 4096.0)
+
+static double trc_smpte_st2084(double Lc)
+{
+    const double c1 = PQ_c1;
+    const double c2 = PQ_c2;
+    const double c3 = PQ_c3;
+    const double m  = PQ_m;
+    const double n  = PQ_n;
+    const double L  = Lc / 10000.0;
+    const double Ln = pow(L, n);
+
+    return (0.0 > Lc) ? 0.0
+         :              pow((c1 + c2 * Ln) / (1.0 + c3 * Ln), m);
+
+}
+
+static double trc_smpte_st2084_inv(double E)
+{
+    const double c1 = PQ_c1;
+    const double c2 = PQ_c2;
+    const double c3 = PQ_c3;
+    const double m  = PQ_m;
+    const double n  = PQ_n;
+    const double Em = pow(E, 1.0 / m);
+
+    return (c1 > Em) ? 0.0
+                     : 10000.0 * pow((Em - c1) / (c2 - c3 * Em), 1.0 / n);
+}
+
+#define DCI_L 48.00
+#define DCI_P 52.37
+
+static double trc_smpte_st428_1(double Lc)
+{
+    return (0.0 > Lc) ? 0.0 : pow(DCI_L / DCI_P * Lc, 1.0 / 2.6);
+}
+
+static double trc_smpte_st428_1_inv(double E)
+{
+    return (0.0 > E) ? 0.0 : DCI_P / DCI_L * pow(E, 2.6);
+}
+
+#define HLG_a 0.17883277
+#define HLG_b 0.28466892
+#define HLG_c 0.55991073
+
+static double trc_arib_std_b67(double Lc) {
+    // The function uses the definition from HEVC, which assumes that the peak
+    // white is input level = 1. (this is equivalent to scaling E = Lc * 12 and
+    // using the definition from the ARIB STD-B67 spec)
+    const double a = HLG_a;
+    const double b = HLG_b;
+    const double c = HLG_c;
+    return (0.0 > Lc) ? 0.0 :
+        (Lc <= 1.0 / 12.0 ? sqrt(3.0 * Lc) : a * log(12.0 * Lc - b) + c);
+}
+
+static double trc_arib_std_b67_inv(double E)
+{
+    const double a = HLG_a;
+    const double b = HLG_b;
+    const double c = HLG_c;
+    return (0.0 > E) ? 0.0 :
+        (E <= 0.5 ? E * E / 3.0 : (exp((E - c) / a) + b) / 12.0);
+}
+
+static const av_csp_trc_function trc_funcs[AVCOL_TRC_NB] = {
+    [AVCOL_TRC_BT709] = trc_bt709,
+    [AVCOL_TRC_GAMMA22] = trc_gamma22,
+    [AVCOL_TRC_GAMMA28] = trc_gamma28,
+    [AVCOL_TRC_SMPTE170M] = trc_bt709,
+    [AVCOL_TRC_SMPTE240M] = trc_smpte240M,
+    [AVCOL_TRC_LINEAR] = trc_linear,
+    [AVCOL_TRC_LOG] = trc_log,
+    [AVCOL_TRC_LOG_SQRT] = trc_log_sqrt,
+    [AVCOL_TRC_IEC61966_2_4] = trc_iec61966_2_4,
+    [AVCOL_TRC_BT1361_ECG] = trc_bt1361,
+    [AVCOL_TRC_IEC61966_2_1] = trc_iec61966_2_1,
+    [AVCOL_TRC_BT2020_10] = trc_bt709,
+    [AVCOL_TRC_BT2020_12] = trc_bt709,
+    [AVCOL_TRC_SMPTE2084] = trc_smpte_st2084,
+    [AVCOL_TRC_SMPTE428] = trc_smpte_st428_1,
+    [AVCOL_TRC_ARIB_STD_B67] = trc_arib_std_b67,
+};
+
+av_csp_trc_function av_csp_trc_func_from_id(enum AVColorTransferCharacteristic trc)
+{
+    if ((unsigned)trc >= AVCOL_TRC_NB)
+        return NULL;
+    return trc_funcs[trc];
+}
+
+static const av_csp_trc_function trc_inv_funcs[AVCOL_TRC_NB] = {
+    [AVCOL_TRC_BT709] = trc_bt709_inv,
+    [AVCOL_TRC_GAMMA22] = trc_gamma22_inv,
+    [AVCOL_TRC_GAMMA28] = trc_gamma28_inv,
+    [AVCOL_TRC_SMPTE170M] = trc_bt709_inv,
+    [AVCOL_TRC_SMPTE240M] = trc_smpte240M_inv,
+    [AVCOL_TRC_LINEAR] = trc_linear,
+    [AVCOL_TRC_LOG] = trc_log_inv,
+    [AVCOL_TRC_LOG_SQRT] = trc_log_sqrt_inv,
+    [AVCOL_TRC_IEC61966_2_4] = trc_iec61966_2_4_inv,
+    [AVCOL_TRC_BT1361_ECG] = trc_bt1361_inv,
+    [AVCOL_TRC_IEC61966_2_1] = trc_iec61966_2_1_inv,
+    [AVCOL_TRC_BT2020_10] = trc_bt709_inv,
+    [AVCOL_TRC_BT2020_12] = trc_bt709_inv,
+    [AVCOL_TRC_SMPTE2084] = trc_smpte_st2084_inv,
+    [AVCOL_TRC_SMPTE428] = trc_smpte_st428_1_inv,
+    [AVCOL_TRC_ARIB_STD_B67] = trc_arib_std_b67_inv,
+};
+
+av_csp_trc_function av_csp_trc_func_inv_from_id(enum AVColorTransferCharacteristic trc)
+{
+    if ((unsigned)trc >= AVCOL_TRC_NB)
+        return NULL;
+    return trc_inv_funcs[trc];
+}
+
+static void eotf_linear(const double Lw, const double Lb, double E[3])
+{
+    for (int i = 0; i < 3; i++)
+        E[i] = (Lw - Lb) * E[i] + Lb;
+}
+
+static void eotf_linear_inv(const double Lw, const double Lb, double L[3])
+{
+    for (int i = 0; i < 3; i++)
+        L[i] = (L[i] - Lb) / (Lw - Lb);
+}
+
+#define WRAP_SDR_OETF(name)                                         \
+static void oetf_##name(double L[3])                                \
+{                                                                   \
+    for (int i = 0; i < 3; i++)                                     \
+        L[i] = trc_##name(L[i]);                                    \
+}                                                                   \
+                                                                    \
+static void oetf_##name##_inv(double E[3])                          \
+{                                                                   \
+    for (int i = 0; i < 3; i++)                                     \
+        E[i] = trc_##name##_inv(E[i]);                              \
+}
+
+WRAP_SDR_OETF(gamma22)
+WRAP_SDR_OETF(gamma28)
+WRAP_SDR_OETF(iec61966_2_1)
+
+#define WRAP_SDR_EOTF(name)                                         \
+static void eotf_##name(double Lw, double Lb, double E[3])          \
+{                                                                   \
+    oetf_##name##_inv(E);                                           \
+    eotf_linear(Lw, Lb, E);                                         \
+}                                                                   \
+                                                                    \
+static void eotf_##name##_inv(double Lw, double Lb, double L[3])    \
+{                                                                   \
+    eotf_linear_inv(Lw, Lb, L);                                     \
+    oetf_##name(L);                                                 \
+}
+
+WRAP_SDR_EOTF(gamma22)
+WRAP_SDR_EOTF(gamma28)
+WRAP_SDR_EOTF(iec61966_2_1)
+
+static void eotf_bt1886(const double Lw, const double Lb, double E[3])
+{
+    const double Lw_inv = pow(Lw, 1.0 / 2.4);
+    const double Lb_inv = pow(Lb, 1.0 / 2.4);
+    const double a = pow(Lw_inv - Lb_inv, 2.4);
+    const double b = Lb_inv / (Lw_inv - Lb_inv);
+
+    for (int i = 0; i < 3; i++)
+        E[i] = (-b > E[i]) ? 0.0 : a * pow(E[i] + b, 2.4);
+}
+
+static void eotf_bt1886_inv(const double Lw, const double Lb, double L[3])
+{
+    const double Lw_inv = pow(Lw, 1.0 / 2.4);
+    const double Lb_inv = pow(Lb, 1.0 / 2.4);
+    const double a = pow(Lw_inv - Lb_inv, 2.4);
+    const double b = Lb_inv / (Lw_inv - Lb_inv);
+
+    for (int i = 0; i < 3; i++)
+        L[i] = (0.0 > L[i]) ? 0.0 : pow(L[i] / a, 1.0 / 2.4) - b;
+}
+
+static void eotf_smpte_st2084(const double Lw, const double Lb, double E[3])
+{
+    for (int i = 0; i < 3; i++)
+        E[i] = trc_smpte_st2084_inv(E[i]);
+}
+
+static void eotf_smpte_st2084_inv(const double Lw, const double Lb, double L[3])
+{
+    for (int i = 0; i < 3; i++)
+        L[i] = trc_smpte_st2084(L[i]);
+}
+
+/* This implementation assumes an SMPTE RP 431-2 reference projector (DCI) */
+#define DCI_L 48.00
+#define DCI_P 52.37
+#define DCI_X (42.94 / DCI_L)
+#define DCI_Z (45.82 / DCI_L)
+
+static void eotf_smpte_st428_1(const double Lw_Y, const double Lb_Y, double E[3])
+{
+    const double Lw[3] = { DCI_X * Lw_Y, Lw_Y, DCI_Z * Lw_Y };
+    const double Lb[3] = { DCI_X * Lb_Y, Lb_Y, DCI_Z * Lb_Y };
+
+    for (int i = 0; i < 3; i++) {
+        E[i] = (0.0 > E[i]) ? 0.0 : pow(E[i], 2.6) * DCI_P / DCI_L;
+        E[i] = E[i] * (Lw[i] - Lb[i]) + Lb[i];
+    }
+}
+
+static void eotf_smpte_st428_1_inv(const double Lw_Y, const double Lb_Y, double L[3])
+{
+    const double Lw[3] = { DCI_X * Lw_Y, Lw_Y, DCI_Z * Lw_Y };
+    const double Lb[3] = { DCI_X * Lb_Y, Lb_Y, DCI_Z * Lb_Y };
+
+    for (int i = 0; i < 3; i++) {
+        L[i] = (L[i] - Lb[i]) / (Lw[i] - Lb[i]);
+        L[i] = (0.0 > L[i]) ? 0.0 : pow(L[i] * DCI_L / DCI_P, 1.0 / 2.6);
+    }
+}
+
+static void eotf_arib_std_b67(const double Lw, const double Lb, double E[3])
+{
+    const double gamma = fmax(1.2 + 0.42 * log10(Lw / 1000.0), 1.0);
+
+    /**
+     * Note: This equation is technically only accurate if the contrast ratio
+     * Lw:Lb is greater than 12:1; otherwise we would need to use a different,
+     * significantly more complicated solution. Ignore this as a highly
+     * degenerate case, since any real world reference display will have a
+     * static contrast ratio multiple orders of magnitude higher.
+     */
+    const double beta = sqrt(3 * pow(Lb / Lw, 1.0 / gamma));
+    double luma;
+
+    for (int i = 0; i < 3; i++)
+        E[i] = trc_arib_std_b67_inv((1 - beta) * E[i] + beta);
+
+    luma = 0.2627 * E[0] + 0.6780 * E[1] + 0.0593 * E[2];
+    luma = pow(fmax(luma, 0.0), gamma - 1.0);
+    for (int i = 0; i < 3; i++)
+        E[i] *= Lw * luma;
+}
+
+static void eotf_arib_std_b67_inv(const double Lw, const double Lb, double L[3])
+{
+    const double gamma = fmax(1.2 + 0.42 * log10(Lw / 1000.0), 1.0);
+    const double beta = sqrt(3 * pow(Lb / Lw, 1 / gamma));
+    double luma = 0.2627 * L[0] + 0.6780 * L[1] + 0.0593 * L[2];
+
+    if (luma > 0.0) {
+        luma = pow(luma / Lw, (1 - gamma) / gamma);
+        for (int i = 0; i < 3; i++)
+            L[i] *= luma / Lw;
+    } else {
+        L[0] = L[1] = L[2] = 0.0;
+    }
+
+    for (int i = 0; i < 3; i++)
+        L[i] = (trc_arib_std_b67(L[i]) - beta) / (1 - beta);
+}
+
+static const av_csp_eotf_function eotf_funcs[AVCOL_TRC_NB] = {
+    [AVCOL_TRC_BT709] = eotf_bt1886,
+    [AVCOL_TRC_GAMMA22] = eotf_gamma22,
+    [AVCOL_TRC_GAMMA28] = eotf_gamma28,
+    [AVCOL_TRC_SMPTE170M] = eotf_bt1886,
+    [AVCOL_TRC_SMPTE240M] = eotf_bt1886,
+    [AVCOL_TRC_LINEAR] = eotf_linear,
+    /* There is no EOTF associated with these logarithmic encodings, since they
+     * are defined purely for transmission of scene referred data. */
+    [AVCOL_TRC_LOG] = NULL,
+    [AVCOL_TRC_LOG_SQRT] = NULL,
+    /* BT.1886 is already defined for values below 0.0, as far as physically
+     * meaningful, so we can directly use it for extended range encodings */
+    [AVCOL_TRC_IEC61966_2_4] = eotf_bt1886,
+    [AVCOL_TRC_BT1361_ECG] = eotf_bt1886,
+    [AVCOL_TRC_IEC61966_2_1] = eotf_iec61966_2_1,
+    [AVCOL_TRC_BT2020_10] = eotf_bt1886,
+    [AVCOL_TRC_BT2020_12] = eotf_bt1886,
+    [AVCOL_TRC_SMPTE2084] = eotf_smpte_st2084,
+    [AVCOL_TRC_SMPTE428] = eotf_smpte_st428_1,
+    [AVCOL_TRC_ARIB_STD_B67] = eotf_arib_std_b67,
+};
+
+av_csp_eotf_function av_csp_itu_eotf(enum AVColorTransferCharacteristic trc)
+{
+    if ((unsigned)trc >= AVCOL_TRC_NB)
+        return NULL;
+    return eotf_funcs[trc];
+}
+
+static const av_csp_eotf_function eotf_inv_funcs[AVCOL_TRC_NB] = {
+    [AVCOL_TRC_BT709] = eotf_bt1886_inv,
+    [AVCOL_TRC_GAMMA22] = eotf_gamma22_inv,
+    [AVCOL_TRC_GAMMA28] = eotf_gamma28_inv,
+    [AVCOL_TRC_SMPTE170M] = eotf_bt1886_inv,
+    [AVCOL_TRC_SMPTE240M] = eotf_bt1886_inv,
+    [AVCOL_TRC_LINEAR] = eotf_linear_inv,
+    [AVCOL_TRC_LOG] = NULL,
+    [AVCOL_TRC_LOG_SQRT] = NULL,
+    [AVCOL_TRC_IEC61966_2_4] = eotf_bt1886_inv,
+    [AVCOL_TRC_BT1361_ECG] = eotf_bt1886_inv,
+    [AVCOL_TRC_IEC61966_2_1] = eotf_iec61966_2_1_inv,
+    [AVCOL_TRC_BT2020_10] = eotf_bt1886_inv,
+    [AVCOL_TRC_BT2020_12] = eotf_bt1886_inv,
+    [AVCOL_TRC_SMPTE2084] = eotf_smpte_st2084_inv,
+    [AVCOL_TRC_SMPTE428] = eotf_smpte_st428_1_inv,
+    [AVCOL_TRC_ARIB_STD_B67] = eotf_arib_std_b67_inv,
+};
+
+av_csp_eotf_function av_csp_itu_eotf_inv(enum AVColorTransferCharacteristic trc)
+{
+    if ((unsigned)trc >= AVCOL_TRC_NB)
+        return NULL;
+    return eotf_inv_funcs[trc];
+}

ffmpeg/libavutil/csp.h

@@ -0,0 +1,192 @@
+/*
+ * Copyright (c) 2015 Kevin Wheatley <kevin.j.wheatley@gmail.com>
+ * Copyright (c) 2016 Ronald S. Bultje <rsbultje@gmail.com>
+ * Copyright (c) 2023 Leo Izen <leo.izen@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CSP_H
+#define AVUTIL_CSP_H
+
+#include "pixfmt.h"
+#include "rational.h"
+
+/**
+ * @file
+ * Colorspace value utility functions for libavutil.
+ * @ingroup lavu_math_csp
+ * @author Ronald S. Bultje <rsbultje@gmail.com>
+ * @author Leo Izen <leo.izen@gmail.com>
+ * @author Kevin Wheatley <kevin.j.wheatley@gmail.com>
+ */
+
+/**
+ * @defgroup lavu_math_csp Colorspace Utility
+ * @ingroup lavu_math
+ * @{
+ */
+
+/**
+ * Struct containing luma coefficients to be used for RGB to YUV/YCoCg, or similar
+ * calculations.
+ */
+typedef struct AVLumaCoefficients {
+    AVRational cr, cg, cb;
+} AVLumaCoefficients;
+
+/**
+ * Struct containing chromaticity x and y values for the standard CIE 1931
+ * chromaticity definition.
+ */
+typedef struct AVCIExy {
+    AVRational x, y;
+} AVCIExy;
+
+/**
+ * Struct defining the red, green, and blue primary locations in terms of CIE
+ * 1931 chromaticity x and y.
+ */
+typedef struct AVPrimaryCoefficients {
+    AVCIExy r, g, b;
+} AVPrimaryCoefficients;
+
+/**
+ * Struct defining white point location in terms of CIE 1931 chromaticity x
+ * and y.
+ */
+typedef AVCIExy AVWhitepointCoefficients;
+
+/**
+ * Struct that contains both white point location and primaries location, providing
+ * the complete description of a color gamut.
+ */
+typedef struct AVColorPrimariesDesc {
+    AVWhitepointCoefficients wp;
+    AVPrimaryCoefficients prim;
+} AVColorPrimariesDesc;
+
+/**
+ * Function pointer representing a double -> double transfer function that
+ * performs either an OETF transfer function, or alternatively an inverse EOTF
+ * function (in particular, for SMPTE ST 2084 / PQ). This function inputs
+ * linear light, and outputs gamma encoded light.
+ *
+ * See ITU-T H.273 for more information.
+ */
+typedef double (*av_csp_trc_function)(double);
+
+/**
+ * Retrieves the Luma coefficients necessary to construct a conversion matrix
+ * from an enum constant describing the colorspace.
+ * @param csp An enum constant indicating YUV or similar colorspace.
+ * @return The Luma coefficients associated with that colorspace, or NULL
+ *     if the constant is unknown to libavutil.
+ */
+const AVLumaCoefficients *av_csp_luma_coeffs_from_avcsp(enum AVColorSpace csp);
+
+/**
+ * Retrieves a complete gamut description from an enum constant describing the
+ * color primaries.
+ * @param prm An enum constant indicating primaries
+ * @return A description of the colorspace gamut associated with that enum
+ *     constant, or NULL if the constant is unknown to libavutil.
+ */
+const AVColorPrimariesDesc *av_csp_primaries_desc_from_id(enum AVColorPrimaries prm);
+
+/**
+ * Detects which enum AVColorPrimaries constant corresponds to the given complete
+ * gamut description.
+ * @see enum AVColorPrimaries
+ * @param prm A description of the colorspace gamut
+ * @return The enum constant associated with this gamut, or
+ *     AVCOL_PRI_UNSPECIFIED if no clear match can be identified.
+ */
+enum AVColorPrimaries av_csp_primaries_id_from_desc(const AVColorPrimariesDesc *prm);
+
+/**
+ * Determine a suitable 'gamma' value to match the supplied
+ * AVColorTransferCharacteristic.
+ *
+ * See Apple Technical Note TN2257 (https://developer.apple.com/library/mac/technotes/tn2257/_index.html)
+ *
+ * This function returns the gamma exponent for the OETF. For example, sRGB is approximated
+ * by gamma 2.2, not by gamma 0.45455.
+ *
+ * @return Will return an approximation to the simple gamma function matching
+ *         the supplied Transfer Characteristic, Will return 0.0 for any
+ *         we cannot reasonably match against.
+ */
+double av_csp_approximate_trc_gamma(enum AVColorTransferCharacteristic trc);
+
+/**
+ * Determine the function needed to apply the given
+ * AVColorTransferCharacteristic to linear input.
+ *
+ * The function returned should expect a nominal domain and range of [0.0-1.0]
+ * values outside of this range maybe valid depending on the chosen
+ * characteristic function.
+ *
+ * @return Will return pointer to the function matching the
+ *         supplied Transfer Characteristic. If unspecified will
+ *         return NULL:
+ */
+av_csp_trc_function av_csp_trc_func_from_id(enum AVColorTransferCharacteristic trc);
+
+/**
+ * Returns the mathematical inverse of the corresponding TRC function.
+ */
+av_csp_trc_function av_csp_trc_func_inv_from_id(enum AVColorTransferCharacteristic trc);
+
+/**
+ * Function pointer representing an ITU EOTF transfer for a given reference
+ * display configuration.
+ *
+ * @param Lw The white point luminance of the display, in nits (cd/m^2).
+ * @param Lb The black point luminance of the display, in nits (cd/m^2).
+ */
+typedef void (*av_csp_eotf_function)(double Lw, double Lb, double c[3]);
+
+/**
+ * Returns the ITU EOTF corresponding to a given TRC. This converts from the
+ * signal level [0,1] to the raw output display luminance in nits (cd/m^2).
+ * This is done per channel in RGB space, except for AVCOL_TRC_SMPTE428, which
+ * assumes CIE XYZ in- and output.
+ *
+ * @return A pointer to the function implementing the given TRC, or NULL if no
+ *         such function is defined.
+ *
+ * @note In general, the resulting function is defined (wherever possible) for
+ *       out-of-range values, even though these values do not have a physical
+ *       meaning on the given display. Users should clamp inputs (or outputs)
+ *       if this behavior is not desired.
+ *
+ *       This is also the case for functions like PQ, which are defined over an
+ *       absolute signal range independent of the target display capabilities.
+ */
+av_csp_eotf_function av_csp_itu_eotf(enum AVColorTransferCharacteristic trc);
+
+/**
+ * Returns the mathematical inverse of the corresponding EOTF.
+ */
+av_csp_eotf_function av_csp_itu_eotf_inv(enum AVColorTransferCharacteristic trc);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_CSP_H */

ffmpeg/libavutil/cuda_check.h

@@ -0,0 +1,67 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+#ifndef AVUTIL_CUDA_CHECK_H
+#define AVUTIL_CUDA_CHECK_H
+
+#include "compat/cuda/dynlink_loader.h"
+#include "error.h"
+
+typedef CUresult CUDAAPI cuda_check_GetErrorName(CUresult error, const char** pstr);
+typedef CUresult CUDAAPI cuda_check_GetErrorString(CUresult error, const char** pstr);
+
+/**
+ * Wrap a CUDA function call and print error information if it fails.
+ */
+static inline int ff_cuda_check(void *avctx,
+                                void *cuGetErrorName_fn, void *cuGetErrorString_fn,
+                                CUresult err, const char *func)
+{
+    const char *err_name;
+    const char *err_string;
+
+    av_log(avctx, AV_LOG_TRACE, "Calling %s\n", func);
+
+    if (err == CUDA_SUCCESS)
+        return 0;
+
+    ((cuda_check_GetErrorName *)cuGetErrorName_fn)(err, &err_name);
+    ((cuda_check_GetErrorString *)cuGetErrorString_fn)(err, &err_string);
+
+    av_log(avctx, AV_LOG_ERROR, "%s failed", func);
+    if (err_name && err_string)
+        av_log(avctx, AV_LOG_ERROR, " -> %s: %s", err_name, err_string);
+    av_log(avctx, AV_LOG_ERROR, "\n");
+
+    return AVERROR_EXTERNAL;
+}
+
+/**
+ * Convenience wrapper for ff_cuda_check when directly linking libcuda.
+ */
+
+#define FF_CUDA_CHECK(avclass, x) ff_cuda_check(avclass, cuGetErrorName, cuGetErrorString, (x), #x)
+
+/**
+ * Convenience wrapper for ff_cuda_check when dynamically loading cuda symbols.
+ */
+
+#define FF_CUDA_CHECK_DL(avclass, cudl, x) ff_cuda_check(avclass, cudl->cuGetErrorName, cudl->cuGetErrorString, (x), #x)
+
+#endif /* AVUTIL_CUDA_CHECK_H */

ffmpeg/libavutil/des.c

@@ -0,0 +1,333 @@
+/*
+ * DES encryption/decryption
+ * Copyright (c) 2007 Reimar Doeffinger
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include <stdint.h>
+
+#include "attributes.h"
+#include "error.h"
+#include "intreadwrite.h"
+#include "mem.h"
+#include "des.h"
+
+#define T(a, b, c, d, e, f, g, h) 64 - a, 64 - b, 64 - c, 64 - d, 64 - e, 64 - f, 64 - g, 64 - h
+static const uint8_t IP_shuffle[] = {
+    T(58, 50, 42, 34, 26, 18, 10, 2),
+    T(60, 52, 44, 36, 28, 20, 12, 4),
+    T(62, 54, 46, 38, 30, 22, 14, 6),
+    T(64, 56, 48, 40, 32, 24, 16, 8),
+    T(57, 49, 41, 33, 25, 17,  9, 1),
+    T(59, 51, 43, 35, 27, 19, 11, 3),
+    T(61, 53, 45, 37, 29, 21, 13, 5),
+    T(63, 55, 47, 39, 31, 23, 15, 7)
+};
+#undef T
+
+#if CONFIG_SMALL || defined(GENTABLES)
+#define T(a, b, c, d) 32 - a, 32 - b, 32 - c, 32 - d
+static const uint8_t P_shuffle[] = {
+    T(16,  7, 20, 21),
+    T(29, 12, 28, 17),
+    T( 1, 15, 23, 26),
+    T( 5, 18, 31, 10),
+    T( 2,  8, 24, 14),
+    T(32, 27,  3,  9),
+    T(19, 13, 30,  6),
+    T(22, 11,  4, 25)
+};
+#undef T
+#endif
+
+#define T(a, b, c, d, e, f, g) 64 - a, 64 - b, 64 - c, 64 - d, 64 - e, 64 - f, 64 - g
+static const uint8_t PC1_shuffle[] = {
+    T(57, 49, 41, 33, 25, 17,  9),
+    T( 1, 58, 50, 42, 34, 26, 18),
+    T(10,  2, 59, 51, 43, 35, 27),
+    T(19, 11,  3, 60, 52, 44, 36),
+    T(63, 55, 47, 39, 31, 23, 15),
+    T( 7, 62, 54, 46, 38, 30, 22),
+    T(14,  6, 61, 53, 45, 37, 29),
+    T(21, 13,  5, 28, 20, 12,  4)
+};
+#undef T
+
+#define T(a, b, c, d, e, f) 56 - a, 56 - b, 56 - c, 56 - d, 56 - e, 56 - f
+static const uint8_t PC2_shuffle[] = {
+    T(14, 17, 11, 24,  1,  5),
+    T( 3, 28, 15,  6, 21, 10),
+    T(23, 19, 12,  4, 26,  8),
+    T(16,  7, 27, 20, 13,  2),
+    T(41, 52, 31, 37, 47, 55),
+    T(30, 40, 51, 45, 33, 48),
+    T(44, 49, 39, 56, 34, 53),
+    T(46, 42, 50, 36, 29, 32)
+};
+#undef T
+
+#if CONFIG_SMALL
+static const uint8_t S_boxes[8][32] = {
+    { 0x0e, 0xf4, 0x7d, 0x41, 0xe2, 0x2f, 0xdb, 0x18, 0xa3, 0x6a, 0xc6, 0xbc, 0x95, 0x59, 0x30, 0x87,
+      0xf4, 0xc1, 0x8e, 0x28, 0x4d, 0x96, 0x12, 0x7b, 0x5f, 0xbc, 0x39, 0xe7, 0xa3, 0x0a, 0x65, 0xd0, },
+    { 0x3f, 0xd1, 0x48, 0x7e, 0xf6, 0x2b, 0x83, 0xe4, 0xc9, 0x07, 0x12, 0xad, 0x6c, 0x90, 0xb5, 0x5a,
+      0xd0, 0x8e, 0xa7, 0x1b, 0x3a, 0xf4, 0x4d, 0x21, 0xb5, 0x68, 0x7c, 0xc6, 0x09, 0x53, 0xe2, 0x9f, },
+    { 0xda, 0x70, 0x09, 0x9e, 0x36, 0x43, 0x6f, 0xa5, 0x21, 0x8d, 0x5c, 0xe7, 0xcb, 0xb4, 0xf2, 0x18,
+      0x1d, 0xa6, 0xd4, 0x09, 0x68, 0x9f, 0x83, 0x70, 0x4b, 0xf1, 0xe2, 0x3c, 0xb5, 0x5a, 0x2e, 0xc7, },
+    { 0xd7, 0x8d, 0xbe, 0x53, 0x60, 0xf6, 0x09, 0x3a, 0x41, 0x72, 0x28, 0xc5, 0x1b, 0xac, 0xe4, 0x9f,
+      0x3a, 0xf6, 0x09, 0x60, 0xac, 0x1b, 0xd7, 0x8d, 0x9f, 0x41, 0x53, 0xbe, 0xc5, 0x72, 0x28, 0xe4, },
+    { 0xe2, 0xbc, 0x24, 0xc1, 0x47, 0x7a, 0xdb, 0x16, 0x58, 0x05, 0xf3, 0xaf, 0x3d, 0x90, 0x8e, 0x69,
+      0xb4, 0x82, 0xc1, 0x7b, 0x1a, 0xed, 0x27, 0xd8, 0x6f, 0xf9, 0x0c, 0x95, 0xa6, 0x43, 0x50, 0x3e, },
+    { 0xac, 0xf1, 0x4a, 0x2f, 0x79, 0xc2, 0x96, 0x58, 0x60, 0x1d, 0xd3, 0xe4, 0x0e, 0xb7, 0x35, 0x8b,
+      0x49, 0x3e, 0x2f, 0xc5, 0x92, 0x58, 0xfc, 0xa3, 0xb7, 0xe0, 0x14, 0x7a, 0x61, 0x0d, 0x8b, 0xd6, },
+    { 0xd4, 0x0b, 0xb2, 0x7e, 0x4f, 0x90, 0x18, 0xad, 0xe3, 0x3c, 0x59, 0xc7, 0x25, 0xfa, 0x86, 0x61,
+      0x61, 0xb4, 0xdb, 0x8d, 0x1c, 0x43, 0xa7, 0x7e, 0x9a, 0x5f, 0x06, 0xf8, 0xe0, 0x25, 0x39, 0xc2, },
+    { 0x1d, 0xf2, 0xd8, 0x84, 0xa6, 0x3f, 0x7b, 0x41, 0xca, 0x59, 0x63, 0xbe, 0x05, 0xe0, 0x9c, 0x27,
+      0x27, 0x1b, 0xe4, 0x71, 0x49, 0xac, 0x8e, 0xd2, 0xf0, 0xc6, 0x9a, 0x0d, 0x3f, 0x53, 0x65, 0xb8,
+    }
+};
+#else
+/**
+ * This table contains the results of applying both the S-box and P-shuffle.
+ * It can be regenerated by compiling tests/des.c with "-DCONFIG_SMALL -DGENTABLES".
+ */
+static const uint32_t S_boxes_P_shuffle[8][64] = {
+    { 0x00808200, 0x00000000, 0x00008000, 0x00808202, 0x00808002, 0x00008202, 0x00000002, 0x00008000,
+      0x00000200, 0x00808200, 0x00808202, 0x00000200, 0x00800202, 0x00808002, 0x00800000, 0x00000002,
+      0x00000202, 0x00800200, 0x00800200, 0x00008200, 0x00008200, 0x00808000, 0x00808000, 0x00800202,
+      0x00008002, 0x00800002, 0x00800002, 0x00008002, 0x00000000, 0x00000202, 0x00008202, 0x00800000,
+      0x00008000, 0x00808202, 0x00000002, 0x00808000, 0x00808200, 0x00800000, 0x00800000, 0x00000200,
+      0x00808002, 0x00008000, 0x00008200, 0x00800002, 0x00000200, 0x00000002, 0x00800202, 0x00008202,
+      0x00808202, 0x00008002, 0x00808000, 0x00800202, 0x00800002, 0x00000202, 0x00008202, 0x00808200,
+      0x00000202, 0x00800200, 0x00800200, 0x00000000, 0x00008002, 0x00008200, 0x00000000, 0x00808002, },
+    { 0x40084010, 0x40004000, 0x00004000, 0x00084010, 0x00080000, 0x00000010, 0x40080010, 0x40004010,
+      0x40000010, 0x40084010, 0x40084000, 0x40000000, 0x40004000, 0x00080000, 0x00000010, 0x40080010,
+      0x00084000, 0x00080010, 0x40004010, 0x00000000, 0x40000000, 0x00004000, 0x00084010, 0x40080000,
+      0x00080010, 0x40000010, 0x00000000, 0x00084000, 0x00004010, 0x40084000, 0x40080000, 0x00004010,
+      0x00000000, 0x00084010, 0x40080010, 0x00080000, 0x40004010, 0x40080000, 0x40084000, 0x00004000,
+      0x40080000, 0x40004000, 0x00000010, 0x40084010, 0x00084010, 0x00000010, 0x00004000, 0x40000000,
+      0x00004010, 0x40084000, 0x00080000, 0x40000010, 0x00080010, 0x40004010, 0x40000010, 0x00080010,
+      0x00084000, 0x00000000, 0x40004000, 0x00004010, 0x40000000, 0x40080010, 0x40084010, 0x00084000, },
+    { 0x00000104, 0x04010100, 0x00000000, 0x04010004, 0x04000100, 0x00000000, 0x00010104, 0x04000100,
+      0x00010004, 0x04000004, 0x04000004, 0x00010000, 0x04010104, 0x00010004, 0x04010000, 0x00000104,
+      0x04000000, 0x00000004, 0x04010100, 0x00000100, 0x00010100, 0x04010000, 0x04010004, 0x00010104,
+      0x04000104, 0x00010100, 0x00010000, 0x04000104, 0x00000004, 0x04010104, 0x00000100, 0x04000000,
+      0x04010100, 0x04000000, 0x00010004, 0x00000104, 0x00010000, 0x04010100, 0x04000100, 0x00000000,
+      0x00000100, 0x00010004, 0x04010104, 0x04000100, 0x04000004, 0x00000100, 0x00000000, 0x04010004,
+      0x04000104, 0x00010000, 0x04000000, 0x04010104, 0x00000004, 0x00010104, 0x00010100, 0x04000004,
+      0x04010000, 0x04000104, 0x00000104, 0x04010000, 0x00010104, 0x00000004, 0x04010004, 0x00010100, },
+    { 0x80401000, 0x80001040, 0x80001040, 0x00000040, 0x00401040, 0x80400040, 0x80400000, 0x80001000,
+      0x00000000, 0x00401000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00400040, 0x80400000,
+      0x80000000, 0x00001000, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x80001000, 0x00001040,
+      0x80400040, 0x80000000, 0x00001040, 0x00400040, 0x00001000, 0x00401040, 0x80401040, 0x80000040,
+      0x00400040, 0x80400000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00000000, 0x00401000,
+      0x00001040, 0x00400040, 0x80400040, 0x80000000, 0x80401000, 0x80001040, 0x80001040, 0x00000040,
+      0x80401040, 0x80000040, 0x80000000, 0x00001000, 0x80400000, 0x80001000, 0x00401040, 0x80400040,
+      0x80001000, 0x00001040, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x00001000, 0x00401040, },
+    { 0x00000080, 0x01040080, 0x01040000, 0x21000080, 0x00040000, 0x00000080, 0x20000000, 0x01040000,
+      0x20040080, 0x00040000, 0x01000080, 0x20040080, 0x21000080, 0x21040000, 0x00040080, 0x20000000,
+      0x01000000, 0x20040000, 0x20040000, 0x00000000, 0x20000080, 0x21040080, 0x21040080, 0x01000080,
+      0x21040000, 0x20000080, 0x00000000, 0x21000000, 0x01040080, 0x01000000, 0x21000000, 0x00040080,
+      0x00040000, 0x21000080, 0x00000080, 0x01000000, 0x20000000, 0x01040000, 0x21000080, 0x20040080,
+      0x01000080, 0x20000000, 0x21040000, 0x01040080, 0x20040080, 0x00000080, 0x01000000, 0x21040000,
+      0x21040080, 0x00040080, 0x21000000, 0x21040080, 0x01040000, 0x00000000, 0x20040000, 0x21000000,
+      0x00040080, 0x01000080, 0x20000080, 0x00040000, 0x00000000, 0x20040000, 0x01040080, 0x20000080, },
+    { 0x10000008, 0x10200000, 0x00002000, 0x10202008, 0x10200000, 0x00000008, 0x10202008, 0x00200000,
+      0x10002000, 0x00202008, 0x00200000, 0x10000008, 0x00200008, 0x10002000, 0x10000000, 0x00002008,
+      0x00000000, 0x00200008, 0x10002008, 0x00002000, 0x00202000, 0x10002008, 0x00000008, 0x10200008,
+      0x10200008, 0x00000000, 0x00202008, 0x10202000, 0x00002008, 0x00202000, 0x10202000, 0x10000000,
+      0x10002000, 0x00000008, 0x10200008, 0x00202000, 0x10202008, 0x00200000, 0x00002008, 0x10000008,
+      0x00200000, 0x10002000, 0x10000000, 0x00002008, 0x10000008, 0x10202008, 0x00202000, 0x10200000,
+      0x00202008, 0x10202000, 0x00000000, 0x10200008, 0x00000008, 0x00002000, 0x10200000, 0x00202008,
+      0x00002000, 0x00200008, 0x10002008, 0x00000000, 0x10202000, 0x10000000, 0x00200008, 0x10002008, },
+    { 0x00100000, 0x02100001, 0x02000401, 0x00000000, 0x00000400, 0x02000401, 0x00100401, 0x02100400,
+      0x02100401, 0x00100000, 0x00000000, 0x02000001, 0x00000001, 0x02000000, 0x02100001, 0x00000401,
+      0x02000400, 0x00100401, 0x00100001, 0x02000400, 0x02000001, 0x02100000, 0x02100400, 0x00100001,
+      0x02100000, 0x00000400, 0x00000401, 0x02100401, 0x00100400, 0x00000001, 0x02000000, 0x00100400,
+      0x02000000, 0x00100400, 0x00100000, 0x02000401, 0x02000401, 0x02100001, 0x02100001, 0x00000001,
+      0x00100001, 0x02000000, 0x02000400, 0x00100000, 0x02100400, 0x00000401, 0x00100401, 0x02100400,
+      0x00000401, 0x02000001, 0x02100401, 0x02100000, 0x00100400, 0x00000000, 0x00000001, 0x02100401,
+      0x00000000, 0x00100401, 0x02100000, 0x00000400, 0x02000001, 0x02000400, 0x00000400, 0x00100001, },
+    { 0x08000820, 0x00000800, 0x00020000, 0x08020820, 0x08000000, 0x08000820, 0x00000020, 0x08000000,
+      0x00020020, 0x08020000, 0x08020820, 0x00020800, 0x08020800, 0x00020820, 0x00000800, 0x00000020,
+      0x08020000, 0x08000020, 0x08000800, 0x00000820, 0x00020800, 0x00020020, 0x08020020, 0x08020800,
+      0x00000820, 0x00000000, 0x00000000, 0x08020020, 0x08000020, 0x08000800, 0x00020820, 0x00020000,
+      0x00020820, 0x00020000, 0x08020800, 0x00000800, 0x00000020, 0x08020020, 0x00000800, 0x00020820,
+      0x08000800, 0x00000020, 0x08000020, 0x08020000, 0x08020020, 0x08000000, 0x00020000, 0x08000820,
+      0x00000000, 0x08020820, 0x00020020, 0x08000020, 0x08020000, 0x08000800, 0x08000820, 0x00000000,
+      0x08020820, 0x00020800, 0x00020800, 0x00000820, 0x00000820, 0x00020020, 0x08000000, 0x08020800, },
+};
+#endif
+
+static uint64_t shuffle(uint64_t in, const uint8_t *shuffle, int shuffle_len)
+{
+    int i;
+    uint64_t res = 0;
+    for (i = 0; i < shuffle_len; i++)
+        res += res + ((in >> *shuffle++) & 1);
+    return res;
+}
+
+static uint64_t shuffle_inv(uint64_t in, const uint8_t *shuffle, int shuffle_len)
+{
+    int i;
+    uint64_t res = 0;
+    shuffle += shuffle_len - 1;
+    for (i = 0; i < shuffle_len; i++) {
+        res |= (in & 1) << *shuffle--;
+        in >>= 1;
+    }
+    return res;
+}
+
+static uint32_t f_func(uint32_t r, uint64_t k)
+{
+    int i;
+    uint32_t out = 0;
+    // rotate to get first part of E-shuffle in the lowest 6 bits
+    r = (r << 1) | (r >> 31);
+    // apply S-boxes, those compress the data again from 8 * 6 to 8 * 4 bits
+    for (i = 7; i >= 0; i--) {
+        uint8_t tmp = (r ^ k) & 0x3f;
+#if CONFIG_SMALL
+        uint8_t v = S_boxes[i][tmp >> 1];
+        if (tmp & 1)
+            v >>= 4;
+        out = (out >> 4) | (v << 28);
+#else
+        out |= S_boxes_P_shuffle[i][tmp];
+#endif
+        // get next 6 bits of E-shuffle and round key k into the lowest bits
+        r   = (r >> 4) | (r << 28);
+        k >>= 6;
+    }
+#if CONFIG_SMALL
+    out = shuffle(out, P_shuffle, sizeof(P_shuffle));
+#endif
+    return out;
+}
+
+/**
+ * @brief rotate the two halves of the expanded 56 bit key each 1 bit left
+ *
+ * Note: the specification calls this "shift", so I kept it although
+ * it is confusing.
+ */
+static uint64_t key_shift_left(uint64_t CDn)
+{
+    uint64_t carries = (CDn >> 27) & 0x10000001;
+    CDn <<= 1;
+    CDn  &= ~0x10000001;
+    CDn  |= carries;
+    return CDn;
+}
+
+static void gen_roundkeys(uint64_t K[16], uint64_t key)
+{
+    int i;
+    // discard parity bits from key and shuffle it into C and D parts
+    uint64_t CDn = shuffle(key, PC1_shuffle, sizeof(PC1_shuffle));
+    // generate round keys
+    for (i = 0; i < 16; i++) {
+        CDn = key_shift_left(CDn);
+        if (i > 1 && i != 8 && i != 15)
+            CDn = key_shift_left(CDn);
+        K[i] = shuffle(CDn, PC2_shuffle, sizeof(PC2_shuffle));
+    }
+}
+
+static uint64_t des_encdec(uint64_t in, uint64_t K[16], int decrypt)
+{
+    int i;
+    // used to apply round keys in reverse order for decryption
+    decrypt = decrypt ? 15 : 0;
+    // shuffle irrelevant to security but to ease hardware implementations
+    in = shuffle(in, IP_shuffle, sizeof(IP_shuffle));
+    for (i = 0; i < 16; i++) {
+        uint32_t f_res;
+        f_res = f_func(in, K[decrypt ^ i]);
+        in    = (in << 32) | (in >> 32);
+        in   ^= f_res;
+    }
+    in = (in << 32) | (in >> 32);
+    // reverse shuffle used to ease hardware implementations
+    in = shuffle_inv(in, IP_shuffle, sizeof(IP_shuffle));
+    return in;
+}
+
+AVDES *av_des_alloc(void)
+{
+    return av_mallocz(sizeof(struct AVDES));
+}
+
+int av_des_init(AVDES *d, const uint8_t *key, int key_bits, av_unused int decrypt) {
+    if (key_bits != 64 && key_bits != 192)
+        return AVERROR(EINVAL);
+    d->triple_des = key_bits > 64;
+    gen_roundkeys(d->round_keys[0], AV_RB64(key));
+    if (d->triple_des) {
+        gen_roundkeys(d->round_keys[1], AV_RB64(key +  8));
+        gen_roundkeys(d->round_keys[2], AV_RB64(key + 16));
+    }
+    return 0;
+}
+
+static void av_des_crypt_mac(AVDES *d, uint8_t *dst, const uint8_t *src,
+                             int count, uint8_t *iv, int decrypt, int mac)
+{
+    uint64_t iv_val = iv ? AV_RB64(iv) : 0;
+    while (count-- > 0) {
+        uint64_t dst_val;
+        uint64_t src_val = src ? AV_RB64(src) : 0;
+        if (decrypt) {
+            uint64_t tmp = src_val;
+            if (d->triple_des) {
+                src_val = des_encdec(src_val, d->round_keys[2], 1);
+                src_val = des_encdec(src_val, d->round_keys[1], 0);
+            }
+            dst_val = des_encdec(src_val, d->round_keys[0], 1) ^ iv_val;
+            iv_val  = iv ? tmp : 0;
+        } else {
+            dst_val = des_encdec(src_val ^ iv_val, d->round_keys[0], 0);
+            if (d->triple_des) {
+                dst_val = des_encdec(dst_val, d->round_keys[1], 1);
+                dst_val = des_encdec(dst_val, d->round_keys[2], 0);
+            }
+            iv_val = iv ? dst_val : 0;
+        }
+        AV_WB64(dst, dst_val);
+        src += 8;
+        if (!mac)
+            dst += 8;
+    }
+    if (iv)
+        AV_WB64(iv, iv_val);
+}
+
+void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src,
+                  int count, uint8_t *iv, int decrypt)
+{
+    av_des_crypt_mac(d, dst, src, count, iv, decrypt, 0);
+}
+
+void av_des_mac(AVDES *d, uint8_t *dst, const uint8_t *src, int count)
+{
+    av_des_crypt_mac(d, dst, src, count, (uint8_t[8]) { 0 }, 0, 1);
+}

ffmpeg/libavutil/des.h

@@ -0,0 +1,81 @@
+/*
+ * DES encryption/decryption
+ * Copyright (c) 2007 Reimar Doeffinger
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_DES_H
+#define AVUTIL_DES_H
+
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_des DES
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+typedef struct AVDES {
+    uint64_t round_keys[3][16];
+    int triple_des;
+} AVDES;
+
+/**
+ * Allocate an AVDES context.
+ */
+AVDES *av_des_alloc(void);
+
+/**
+ * @brief Initializes an AVDES context.
+ *
+ * @param d pointer to a AVDES structure to initialize
+ * @param key pointer to the key to use
+ * @param key_bits must be 64 or 192
+ * @param decrypt 0 for encryption/CBC-MAC, 1 for decryption
+ * @return zero on success, negative value otherwise
+ */
+int av_des_init(struct AVDES *d, const uint8_t *key, int key_bits, int decrypt);
+
+/**
+ * @brief Encrypts / decrypts using the DES algorithm.
+ *
+ * @param d pointer to the AVDES structure
+ * @param dst destination array, can be equal to src, must be 8-byte aligned
+ * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
+ * @param count number of 8 byte blocks
+ * @param iv initialization vector for CBC mode, if NULL then ECB will be used,
+ *           must be 8-byte aligned
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_des_crypt(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
+
+/**
+ * @brief Calculates CBC-MAC using the DES algorithm.
+ *
+ * @param d pointer to the AVDES structure
+ * @param dst destination array, can be equal to src, must be 8-byte aligned
+ * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
+ * @param count number of 8 byte blocks
+ */
+void av_des_mac(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_DES_H */

ffmpeg/libavutil/detection_bbox.c

@@ -0,0 +1,73 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "detection_bbox.h"
+#include "mem.h"
+
+AVDetectionBBoxHeader *av_detection_bbox_alloc(uint32_t nb_bboxes, size_t *out_size)
+{
+    size_t size;
+    struct BBoxContext {
+        AVDetectionBBoxHeader header;
+        AVDetectionBBox boxes;
+    };
+    const size_t bboxes_offset = offsetof(struct BBoxContext, boxes);
+    const size_t bbox_size = sizeof(AVDetectionBBox);
+    AVDetectionBBoxHeader *header;
+
+    size = bboxes_offset;
+    if (nb_bboxes > (SIZE_MAX - size) / bbox_size)
+        return NULL;
+    size += bbox_size * nb_bboxes;
+
+    header = av_mallocz(size);
+    if (!header)
+        return NULL;
+
+    header->nb_bboxes     = nb_bboxes;
+    header->bbox_size     = bbox_size;
+    header->bboxes_offset = bboxes_offset;
+
+    if (out_size)
+        *out_size = size;
+
+    return header;
+}
+
+AVDetectionBBoxHeader *av_detection_bbox_create_side_data(AVFrame *frame, uint32_t nb_bboxes)
+{
+    AVBufferRef         *buf;
+    AVDetectionBBoxHeader *header;
+    size_t size;
+
+    header = av_detection_bbox_alloc(nb_bboxes, &size);
+    if (!header)
+        return NULL;
+    buf = av_buffer_create((uint8_t *)header, size, NULL, NULL, 0);
+    if (!buf) {
+        av_freep(&header);
+        return NULL;
+    }
+
+    if (!av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_DETECTION_BBOXES, buf)) {
+        av_buffer_unref(&buf);
+        return NULL;
+    }
+
+    return header;
+}

ffmpeg/libavutil/detection_bbox.h

@@ -0,0 +1,108 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_DETECTION_BBOX_H
+#define AVUTIL_DETECTION_BBOX_H
+
+#include "rational.h"
+#include "avassert.h"
+#include "frame.h"
+
+typedef struct AVDetectionBBox {
+    /**
+     * Distance in pixels from the left/top edge of the frame,
+     * together with width and height, defining the bounding box.
+     */
+    int x;
+    int y;
+    int w;
+    int h;
+
+#define AV_DETECTION_BBOX_LABEL_NAME_MAX_SIZE 64
+
+    /**
+     * Detect result with confidence
+     */
+    char detect_label[AV_DETECTION_BBOX_LABEL_NAME_MAX_SIZE];
+    AVRational detect_confidence;
+
+    /**
+     * At most 4 classifications based on the detected bounding box.
+     * For example, we can get max 4 different attributes with 4 different
+     * DNN models on one bounding box.
+     * classify_count is zero if no classification.
+     */
+#define AV_NUM_DETECTION_BBOX_CLASSIFY 4
+    uint32_t classify_count;
+    char classify_labels[AV_NUM_DETECTION_BBOX_CLASSIFY][AV_DETECTION_BBOX_LABEL_NAME_MAX_SIZE];
+    AVRational classify_confidences[AV_NUM_DETECTION_BBOX_CLASSIFY];
+} AVDetectionBBox;
+
+typedef struct AVDetectionBBoxHeader {
+    /**
+     * Information about how the bounding box is generated.
+     * for example, the DNN model name.
+     */
+    char source[256];
+
+    /**
+     * Number of bounding boxes in the array.
+     */
+    uint32_t nb_bboxes;
+
+    /**
+     * Offset in bytes from the beginning of this structure at which
+     * the array of bounding boxes starts.
+     */
+    size_t bboxes_offset;
+
+    /**
+     * Size of each bounding box in bytes.
+     */
+    size_t bbox_size;
+} AVDetectionBBoxHeader;
+
+/*
+ * Get the bounding box at the specified {@code idx}. Must be between 0 and nb_bboxes.
+ */
+static av_always_inline AVDetectionBBox *
+av_get_detection_bbox(const AVDetectionBBoxHeader *header, unsigned int idx)
+{
+    av_assert0(idx < header->nb_bboxes);
+    return (AVDetectionBBox *)((uint8_t *)header + header->bboxes_offset +
+                               idx * header->bbox_size);
+}
+
+/**
+ * Allocates memory for AVDetectionBBoxHeader, plus an array of {@code nb_bboxes}
+ * AVDetectionBBox, and initializes the variables.
+ * Can be freed with a normal av_free() call.
+ *
+ * @param nb_bboxes number of AVDetectionBBox structures to allocate
+ * @param out_size if non-NULL, the size in bytes of the resulting data array is
+ * written here.
+ */
+AVDetectionBBoxHeader *av_detection_bbox_alloc(uint32_t nb_bboxes, size_t *out_size);
+
+/**
+ * Allocates memory for AVDetectionBBoxHeader, plus an array of {@code nb_bboxes}
+ * AVDetectionBBox, in the given AVFrame {@code frame} as AVFrameSideData of type
+ * AV_FRAME_DATA_DETECTION_BBOXES and initializes the variables.
+ */
+AVDetectionBBoxHeader *av_detection_bbox_create_side_data(AVFrame *frame, uint32_t nb_bboxes);
+#endif

ffmpeg/libavutil/dict.c

@@ -0,0 +1,286 @@
+/*
+ * copyright (c) 2009 Michael Niedermayer
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "avassert.h"
+#include "avstring.h"
+#include "dict.h"
+#include "error.h"
+#include "mem.h"
+#include "bprint.h"
+
+struct AVDictionary {
+    int count;
+    AVDictionaryEntry *elems;
+};
+
+int av_dict_count(const AVDictionary *m)
+{
+    return m ? m->count : 0;
+}
+
+const AVDictionaryEntry *av_dict_iterate(const AVDictionary *m,
+                                         const AVDictionaryEntry *prev)
+{
+    int i = 0;
+
+    if (!m)
+        return NULL;
+
+    if (prev)
+        i = prev - m->elems + 1;
+
+    av_assert2(i >= 0);
+    if (i >= m->count)
+        return NULL;
+
+    return &m->elems[i];
+}
+
+AVDictionaryEntry *av_dict_get(const AVDictionary *m, const char *key,
+                               const AVDictionaryEntry *prev, int flags)
+{
+    const AVDictionaryEntry *entry = prev;
+    unsigned int j;
+
+    if (!key)
+        return NULL;
+
+    while ((entry = av_dict_iterate(m, entry))) {
+        const char *s = entry->key;
+        if (flags & AV_DICT_MATCH_CASE)
+            for (j = 0; s[j] == key[j] && key[j]; j++)
+                ;
+        else
+            for (j = 0; av_toupper(s[j]) == av_toupper(key[j]) && key[j]; j++)
+                ;
+        if (key[j])
+            continue;
+        if (s[j] && !(flags & AV_DICT_IGNORE_SUFFIX))
+            continue;
+        return (AVDictionaryEntry *)entry;
+    }
+    return NULL;
+}
+
+int av_dict_set(AVDictionary **pm, const char *key, const char *value,
+                int flags)
+{
+    AVDictionary *m = *pm;
+    AVDictionaryEntry *tag = NULL;
+    char *copy_key = NULL, *copy_value = NULL;
+    int err;
+
+    if (flags & AV_DICT_DONT_STRDUP_VAL)
+        copy_value = (void *)value;
+    else if (value)
+        copy_value = av_strdup(value);
+    if (!key) {
+        err = AVERROR(EINVAL);
+        goto err_out;
+    }
+    if (flags & AV_DICT_DONT_STRDUP_KEY)
+        copy_key = (void *)key;
+    else
+        copy_key = av_strdup(key);
+    if (!copy_key || (value && !copy_value))
+        goto enomem;
+
+    if (!(flags & AV_DICT_MULTIKEY)) {
+        tag = av_dict_get(m, key, NULL, flags);
+    } else if (flags & AV_DICT_DEDUP) {
+        while ((tag = av_dict_get(m, key, tag, flags))) {
+            if ((!value && !tag->value) ||
+                (value && tag->value && !strcmp(value, tag->value))) {
+                av_free(copy_key);
+                av_free(copy_value);
+                return 0;
+            }
+        }
+    }
+    if (!m)
+        m = *pm = av_mallocz(sizeof(*m));
+    if (!m)
+        goto enomem;
+
+    if (tag) {
+        if (flags & AV_DICT_DONT_OVERWRITE) {
+            av_free(copy_key);
+            av_free(copy_value);
+            return 0;
+        }
+        if (copy_value && flags & AV_DICT_APPEND) {
+            size_t oldlen = strlen(tag->value);
+            size_t new_part_len = strlen(copy_value);
+            size_t len = oldlen + new_part_len + 1;
+            char *newval = av_realloc(tag->value, len);
+            if (!newval)
+                goto enomem;
+            memcpy(newval + oldlen, copy_value, new_part_len + 1);
+            av_freep(&copy_value);
+            copy_value = newval;
+        } else
+            av_free(tag->value);
+        av_free(tag->key);
+        *tag = m->elems[--m->count];
+    } else if (copy_value) {
+        AVDictionaryEntry *tmp = av_realloc_array(m->elems,
+                                                  m->count + 1, sizeof(*m->elems));
+        if (!tmp)
+            goto enomem;
+        m->elems = tmp;
+    }
+    if (copy_value) {
+        m->elems[m->count].key = copy_key;
+        m->elems[m->count].value = copy_value;
+        m->count++;
+    } else {
+        err = 0;
+        goto end;
+    }
+
+    return 0;
+
+enomem:
+    err = AVERROR(ENOMEM);
+err_out:
+    av_free(copy_value);
+end:
+    if (m && !m->count) {
+        av_freep(&m->elems);
+        av_freep(pm);
+    }
+    av_free(copy_key);
+    return err;
+}
+
+int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value,
+                int flags)
+{
+    char valuestr[22];
+    snprintf(valuestr, sizeof(valuestr), "%"PRId64, value);
+    flags &= ~AV_DICT_DONT_STRDUP_VAL;
+    return av_dict_set(pm, key, valuestr, flags);
+}
+
+static int parse_key_value_pair(AVDictionary **pm, const char **buf,
+                                const char *key_val_sep, const char *pairs_sep,
+                                int flags)
+{
+    char *key = av_get_token(buf, key_val_sep);
+    char *val = NULL;
+    int ret;
+
+    if (key && *key && strspn(*buf, key_val_sep)) {
+        (*buf)++;
+        val = av_get_token(buf, pairs_sep);
+    }
+
+    if (key && *key && val && *val)
+        ret = av_dict_set(pm, key, val, flags);
+    else
+        ret = AVERROR(EINVAL);
+
+    av_freep(&key);
+    av_freep(&val);
+
+    return ret;
+}
+
+int av_dict_parse_string(AVDictionary **pm, const char *str,
+                         const char *key_val_sep, const char *pairs_sep,
+                         int flags)
+{
+    int ret;
+
+    if (!str)
+        return 0;
+
+    /* ignore STRDUP flags */
+    flags &= ~(AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
+
+    while (*str) {
+        if ((ret = parse_key_value_pair(pm, &str, key_val_sep, pairs_sep, flags)) < 0)
+            return ret;
+
+        if (*str)
+            str++;
+    }
+
+    return 0;
+}
+
+void av_dict_free(AVDictionary **pm)
+{
+    AVDictionary *m = *pm;
+
+    if (m) {
+        while (m->count--) {
+            av_freep(&m->elems[m->count].key);
+            av_freep(&m->elems[m->count].value);
+        }
+        av_freep(&m->elems);
+    }
+    av_freep(pm);
+}
+
+int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
+{
+    const AVDictionaryEntry *t = NULL;
+
+    while ((t = av_dict_iterate(src, t))) {
+        int ret = av_dict_set(dst, t->key, t->value, flags);
+        if (ret < 0)
+            return ret;
+    }
+
+    return 0;
+}
+
+int av_dict_get_string(const AVDictionary *m, char **buffer,
+                       const char key_val_sep, const char pairs_sep)
+{
+    const AVDictionaryEntry *t = NULL;
+    AVBPrint bprint;
+    int cnt = 0;
+    char special_chars[] = {pairs_sep, key_val_sep, '\0'};
+
+    if (!buffer || pairs_sep == '\0' || key_val_sep == '\0' || pairs_sep == key_val_sep ||
+        pairs_sep == '\\' || key_val_sep == '\\')
+        return AVERROR(EINVAL);
+
+    if (!av_dict_count(m)) {
+        *buffer = av_strdup("");
+        return *buffer ? 0 : AVERROR(ENOMEM);
+    }
+
+    av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
+    while ((t = av_dict_iterate(m, t))) {
+        if (cnt++)
+            av_bprint_append_data(&bprint, &pairs_sep, 1);
+        av_bprint_escape(&bprint, t->key, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
+        av_bprint_append_data(&bprint, &key_val_sep, 1);
+        av_bprint_escape(&bprint, t->value, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
+    }
+    return av_bprint_finalize(&bprint, buffer);
+}

ffmpeg/libavutil/dict.h

@@ -0,0 +1,242 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Public dictionary API.
+ * @deprecated
+ *  AVDictionary is provided for compatibility with libav. It is both in
+ *  implementation as well as API inefficient. It does not scale and is
+ *  extremely slow with large dictionaries.
+ *  It is recommended that new code uses our tree container from tree.c/h
+ *  where applicable, which uses AVL trees to achieve O(log n) performance.
+ */
+
+#ifndef AVUTIL_DICT_H
+#define AVUTIL_DICT_H
+
+#include <stdint.h>
+
+/**
+ * @addtogroup lavu_dict AVDictionary
+ * @ingroup lavu_data
+ *
+ * @brief Simple key:value store
+ *
+ * @{
+ * Dictionaries are used for storing key-value pairs.
+ *
+ * - To **create an AVDictionary**, simply pass an address of a NULL
+ *   pointer to av_dict_set(). NULL can be used as an empty dictionary
+ *   wherever a pointer to an AVDictionary is required.
+ * - To **insert an entry**, use av_dict_set().
+ * - Use av_dict_get() to **retrieve an entry**.
+ * - To **iterate over all entries**, use av_dict_iterate().
+ * - In order to **free the dictionary and all its contents**, use av_dict_free().
+ *
+ @code
+   AVDictionary *d = NULL;           // "create" an empty dictionary
+   AVDictionaryEntry *t = NULL;
+
+   av_dict_set(&d, "foo", "bar", 0); // add an entry
+
+   char *k = av_strdup("key");       // if your strings are already allocated,
+   char *v = av_strdup("value");     // you can avoid copying them like this
+   av_dict_set(&d, k, v, AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
+
+   while ((t = av_dict_iterate(d, t))) {
+       <....>                        // iterate over all entries in d
+   }
+   av_dict_free(&d);
+ @endcode
+ */
+
+/**
+ * @name AVDictionary Flags
+ * Flags that influence behavior of the matching of keys or insertion to the dictionary.
+ * @{
+ */
+#define AV_DICT_MATCH_CASE      1   /**< Only get an entry with exact-case key match. Only relevant in av_dict_get(). */
+#define AV_DICT_IGNORE_SUFFIX   2   /**< Return first entry in a dictionary whose first part corresponds to the search key,
+                                         ignoring the suffix of the found key string. Only relevant in av_dict_get(). */
+#define AV_DICT_DONT_STRDUP_KEY 4   /**< Take ownership of a key that's been
+                                         allocated with av_malloc() or another memory allocation function. */
+#define AV_DICT_DONT_STRDUP_VAL 8   /**< Take ownership of a value that's been
+                                         allocated with av_malloc() or another memory allocation function. */
+#define AV_DICT_DONT_OVERWRITE 16   /**< Don't overwrite existing entries. */
+#define AV_DICT_APPEND         32   /**< If the entry already exists, append to it.  Note that no
+                                         delimiter is added, the strings are simply concatenated. */
+#define AV_DICT_MULTIKEY       64   /**< Allow to store several equal keys in the dictionary */
+#define AV_DICT_DEDUP         128   /**< If inserting a value that already exists for a key, do nothing. Only relevant with AV_DICT_MULTIKEY. */
+/**
+ * @}
+ */
+
+typedef struct AVDictionaryEntry {
+    char *key;
+    char *value;
+} AVDictionaryEntry;
+
+typedef struct AVDictionary AVDictionary;
+
+/**
+ * Get a dictionary entry with matching key.
+ *
+ * The returned entry key or value must not be changed, or it will
+ * cause undefined behavior.
+ *
+ * @param prev  Set to the previous matching element to find the next.
+ *              If set to NULL the first matching element is returned.
+ * @param key   Matching key
+ * @param flags A collection of AV_DICT_* flags controlling how the
+ *              entry is retrieved
+ *
+ * @return      Found entry or NULL in case no matching entry was found in the dictionary
+ */
+AVDictionaryEntry *av_dict_get(const AVDictionary *m, const char *key,
+                               const AVDictionaryEntry *prev, int flags);
+
+/**
+ * Iterate over a dictionary
+ *
+ * Iterates through all entries in the dictionary.
+ *
+ * @warning The returned AVDictionaryEntry key/value must not be changed.
+ *
+ * @warning As av_dict_set() invalidates all previous entries returned
+ * by this function, it must not be called while iterating over the dict.
+ *
+ * Typical usage:
+ * @code
+ * const AVDictionaryEntry *e = NULL;
+ * while ((e = av_dict_iterate(m, e))) {
+ *     // ...
+ * }
+ * @endcode
+ *
+ * @param m     The dictionary to iterate over
+ * @param prev  Pointer to the previous AVDictionaryEntry, NULL initially
+ *
+ * @retval AVDictionaryEntry* The next element in the dictionary
+ * @retval NULL               No more elements in the dictionary
+ */
+const AVDictionaryEntry *av_dict_iterate(const AVDictionary *m,
+                                         const AVDictionaryEntry *prev);
+
+/**
+ * Get number of entries in dictionary.
+ *
+ * @param m dictionary
+ * @return  number of entries in dictionary
+ */
+int av_dict_count(const AVDictionary *m);
+
+/**
+ * Set the given entry in *pm, overwriting an existing entry.
+ *
+ * Note: If AV_DICT_DONT_STRDUP_KEY or AV_DICT_DONT_STRDUP_VAL is set,
+ * these arguments will be freed on error.
+ *
+ * @warning Adding a new entry to a dictionary invalidates all existing entries
+ * previously returned with av_dict_get() or av_dict_iterate().
+ *
+ * @param pm        Pointer to a pointer to a dictionary struct. If *pm is NULL
+ *                  a dictionary struct is allocated and put in *pm.
+ * @param key       Entry key to add to *pm (will either be av_strduped or added as a new key depending on flags)
+ * @param value     Entry value to add to *pm (will be av_strduped or added as a new key depending on flags).
+ *                  Passing a NULL value will cause an existing entry to be deleted.
+ *
+ * @return          >= 0 on success otherwise an error code <0
+ */
+int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags);
+
+/**
+ * Convenience wrapper for av_dict_set() that converts the value to a string
+ * and stores it.
+ *
+ * Note: If ::AV_DICT_DONT_STRDUP_KEY is set, key will be freed on error.
+ */
+int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags);
+
+/**
+ * Parse the key/value pairs list and add the parsed entries to a dictionary.
+ *
+ * In case of failure, all the successfully set entries are stored in
+ * *pm. You may need to manually free the created dictionary.
+ *
+ * @param key_val_sep  A 0-terminated list of characters used to separate
+ *                     key from value
+ * @param pairs_sep    A 0-terminated list of characters used to separate
+ *                     two pairs from each other
+ * @param flags        Flags to use when adding to the dictionary.
+ *                     ::AV_DICT_DONT_STRDUP_KEY and ::AV_DICT_DONT_STRDUP_VAL
+ *                     are ignored since the key/value tokens will always
+ *                     be duplicated.
+ *
+ * @return             0 on success, negative AVERROR code on failure
+ */
+int av_dict_parse_string(AVDictionary **pm, const char *str,
+                         const char *key_val_sep, const char *pairs_sep,
+                         int flags);
+
+/**
+ * Copy entries from one AVDictionary struct into another.
+ *
+ * @note Metadata is read using the ::AV_DICT_IGNORE_SUFFIX flag
+ *
+ * @param dst   Pointer to a pointer to a AVDictionary struct to copy into. If *dst is NULL,
+ *              this function will allocate a struct for you and put it in *dst
+ * @param src   Pointer to the source AVDictionary struct to copy items from.
+ * @param flags Flags to use when setting entries in *dst
+ *
+ * @return 0 on success, negative AVERROR code on failure. If dst was allocated
+ *           by this function, callers should free the associated memory.
+ */
+int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags);
+
+/**
+ * Free all the memory allocated for an AVDictionary struct
+ * and all keys and values.
+ */
+void av_dict_free(AVDictionary **m);
+
+/**
+ * Get dictionary entries as a string.
+ *
+ * Create a string containing dictionary's entries.
+ * Such string may be passed back to av_dict_parse_string().
+ * @note String is escaped with backslashes ('\').
+ *
+ * @warning Separators cannot be neither '\\' nor '\0'. They also cannot be the same.
+ *
+ * @param[in]  m             The dictionary
+ * @param[out] buffer        Pointer to buffer that will be allocated with string containing entries.
+ *                           Buffer must be freed by the caller when is no longer needed.
+ * @param[in]  key_val_sep   Character used to separate key from value
+ * @param[in]  pairs_sep     Character used to separate two pairs from each other
+ *
+ * @return                   >= 0 on success, negative on error
+ */
+int av_dict_get_string(const AVDictionary *m, char **buffer,
+                       const char key_val_sep, const char pairs_sep);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_DICT_H */

ffmpeg/libavutil/display.c

@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2014 Vittorio Giovara <vittorio.giovara@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include <math.h>
+
+#include "display.h"
+#include "libm.h"
+#include "mathematics.h"
+
+// fixed point to double
+#define CONV_FP(x) ((double) (x)) / (1 << 16)
+
+// double to fixed point
+#define CONV_DB(x) (int32_t) ((x) * (1 << 16))
+
+double av_display_rotation_get(const int32_t matrix[9])
+{
+    double rotation, scale[2];
+
+    scale[0] = hypot(CONV_FP(matrix[0]), CONV_FP(matrix[3]));
+    scale[1] = hypot(CONV_FP(matrix[1]), CONV_FP(matrix[4]));
+
+    if (scale[0] == 0.0 || scale[1] == 0.0)
+        return NAN;
+
+    rotation = atan2(CONV_FP(matrix[1]) / scale[1],
+                     CONV_FP(matrix[0]) / scale[0]) * 180 / M_PI;
+
+    return -rotation;
+}
+
+void av_display_rotation_set(int32_t matrix[9], double angle)
+{
+    double radians = -angle * M_PI / 180.0f;
+    double c = cos(radians);
+    double s = sin(radians);
+
+    memset(matrix, 0, 9 * sizeof(int32_t));
+
+    matrix[0] = CONV_DB(c);
+    matrix[1] = CONV_DB(-s);
+    matrix[3] = CONV_DB(s);
+    matrix[4] = CONV_DB(c);
+    matrix[8] = 1 << 30;
+}
+
+void av_display_matrix_flip(int32_t matrix[9], int hflip, int vflip)
+{
+    int i;
+    const int flip[] = { 1 - 2 * (!!hflip), 1 - 2 * (!!vflip), 1 };
+
+    if (hflip || vflip)
+        for (i = 0; i < 9; i++)
+            matrix[i] *= flip[i % 3];
+}

ffmpeg/libavutil/display.h

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2014 Vittorio Giovara <vittorio.giovara@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_video_display
+ * Display matrix
+ */
+
+#ifndef AVUTIL_DISPLAY_H
+#define AVUTIL_DISPLAY_H
+
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_video_display Display transformation matrix functions
+ * @ingroup lavu_video
+ *
+ * The display transformation matrix specifies an affine transformation that
+ * should be applied to video frames for correct presentation. It is compatible
+ * with the matrices stored in the ISO/IEC 14496-12 container format.
+ *
+ * The data is a 3x3 matrix represented as a 9-element array:
+ *
+ * @code{.unparsed}
+ *                                  | a b u |
+ *   (a, b, u, c, d, v, x, y, w) -> | c d v |
+ *                                  | x y w |
+ * @endcode
+ *
+ * All numbers are stored in native endianness, as 16.16 fixed-point values,
+ * except for u, v and w, which are stored as 2.30 fixed-point values.
+ *
+ * The transformation maps a point (p, q) in the source (pre-transformation)
+ * frame to the point (p', q') in the destination (post-transformation) frame as
+ * follows:
+ *
+ * @code{.unparsed}
+ *               | a b u |
+ *   (p, q, 1) . | c d v | = z * (p', q', 1)
+ *               | x y w |
+ * @endcode
+ *
+ * The transformation can also be more explicitly written in components as
+ * follows:
+ *
+ * @code{.unparsed}
+ *   p' = (a * p + c * q + x) / z;
+ *   q' = (b * p + d * q + y) / z;
+ *   z  =  u * p + v * q + w
+ * @endcode
+ *
+ * @{
+ */
+
+/**
+ * Extract the rotation component of the transformation matrix.
+ *
+ * @param matrix the transformation matrix
+ * @return the angle (in degrees) by which the transformation rotates the frame
+ *         counterclockwise. The angle will be in range [-180.0, 180.0],
+ *         or NaN if the matrix is singular.
+ *
+ * @note floating point numbers are inherently inexact, so callers are
+ *       recommended to round the return value to nearest integer before use.
+ */
+double av_display_rotation_get(const int32_t matrix[9]);
+
+/**
+ * Initialize a transformation matrix describing a pure clockwise
+ * rotation by the specified angle (in degrees).
+ *
+ * @param[out] matrix a transformation matrix (will be fully overwritten
+ *                    by this function)
+ * @param angle rotation angle in degrees.
+ */
+void av_display_rotation_set(int32_t matrix[9], double angle);
+
+/**
+ * Flip the input matrix horizontally and/or vertically.
+ *
+ * @param[in,out] matrix a transformation matrix
+ * @param hflip whether the matrix should be flipped horizontally
+ * @param vflip whether the matrix should be flipped vertically
+ */
+void av_display_matrix_flip(int32_t matrix[9], int hflip, int vflip);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_DISPLAY_H */

ffmpeg/libavutil/dovi_meta.c

@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2020 Jun Zhao<barryjzhao@tencent.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+
+#include "dovi_meta.h"
+#include "mem.h"
+
+AVDOVIDecoderConfigurationRecord *av_dovi_alloc(size_t *size)
+{
+    AVDOVIDecoderConfigurationRecord *dovi =
+        av_mallocz(sizeof(AVDOVIDecoderConfigurationRecord));
+    if (!dovi)
+        return NULL;
+
+     if (size)
+        *size = sizeof(*dovi);
+
+    return dovi;
+}
+
+typedef struct AVDOVIMetadataInternal {
+    AVDOVIMetadata metadata;
+    AVDOVIRpuDataHeader header;
+    AVDOVIDataMapping mapping;
+    AVDOVIColorMetadata color;
+    AVDOVIDmData ext_blocks[AV_DOVI_MAX_EXT_BLOCKS];
+} AVDOVIMetadataInternal;
+
+AVDOVIMetadata *av_dovi_metadata_alloc(size_t *size)
+{
+    AVDOVIMetadataInternal *dovi = av_mallocz(sizeof(AVDOVIMetadataInternal));
+    if (!dovi)
+        return NULL;
+
+    if (size)
+        *size = sizeof(*dovi);
+
+    dovi->metadata = (struct AVDOVIMetadata) {
+        .header_offset      = offsetof(AVDOVIMetadataInternal, header),
+        .mapping_offset     = offsetof(AVDOVIMetadataInternal, mapping),
+        .color_offset       = offsetof(AVDOVIMetadataInternal, color),
+        .ext_block_offset   = offsetof(AVDOVIMetadataInternal, ext_blocks),
+        .ext_block_size     = sizeof(AVDOVIDmData),
+    };
+
+    return &dovi->metadata;
+}
+
+AVDOVIDmData *av_dovi_find_level(const AVDOVIMetadata *data, uint8_t level)
+{
+    for (int i = 0; i < data->num_ext_blocks; i++) {
+        AVDOVIDmData *ext = av_dovi_get_ext(data, i);
+        if (ext->level == level)
+            return ext;
+    }
+
+    return NULL;
+}

ffmpeg/libavutil/dovi_meta.h

@@ -0,0 +1,396 @@
+/*
+ * Copyright (c) 2020 Vacing Fang <vacingfang@tencent.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * DOVI configuration
+ */
+
+
+#ifndef AVUTIL_DOVI_META_H
+#define AVUTIL_DOVI_META_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include "rational.h"
+#include "csp.h"
+
+/*
+ * DOVI configuration
+ * ref: dolby-vision-bitstreams-within-the-iso-base-media-file-format-v2.1.2
+        dolby-vision-bitstreams-in-mpeg-2-transport-stream-multiplex-v1.2
+ * @code
+ * uint8_t  dv_version_major, the major version number that the stream complies with
+ * uint8_t  dv_version_minor, the minor version number that the stream complies with
+ * uint8_t  dv_profile, the Dolby Vision profile
+ * uint8_t  dv_level, the Dolby Vision level
+ * uint8_t  rpu_present_flag
+ * uint8_t  el_present_flag
+ * uint8_t  bl_present_flag
+ * uint8_t  dv_bl_signal_compatibility_id
+ * uint8_t  dv_md_compression, the compression method in use
+ * @endcode
+ *
+ * @note The struct must be allocated with av_dovi_alloc() and
+ *       its size is not a part of the public ABI.
+ */
+typedef struct AVDOVIDecoderConfigurationRecord {
+    uint8_t dv_version_major;
+    uint8_t dv_version_minor;
+    uint8_t dv_profile;
+    uint8_t dv_level;
+    uint8_t rpu_present_flag;
+    uint8_t el_present_flag;
+    uint8_t bl_present_flag;
+    uint8_t dv_bl_signal_compatibility_id;
+    uint8_t dv_md_compression;
+} AVDOVIDecoderConfigurationRecord;
+
+enum AVDOVICompression {
+    AV_DOVI_COMPRESSION_NONE     = 0,
+    AV_DOVI_COMPRESSION_LIMITED  = 1,
+    AV_DOVI_COMPRESSION_RESERVED = 2,
+    AV_DOVI_COMPRESSION_EXTENDED = 3,
+};
+
+/**
+ * Allocate a AVDOVIDecoderConfigurationRecord structure and initialize its
+ * fields to default values.
+ *
+ * @return the newly allocated struct or NULL on failure
+ */
+AVDOVIDecoderConfigurationRecord *av_dovi_alloc(size_t *size);
+
+/**
+ * Dolby Vision RPU data header.
+ *
+ * @note sizeof(AVDOVIRpuDataHeader) is not part of the public ABI.
+ */
+typedef struct AVDOVIRpuDataHeader {
+    uint8_t rpu_type;
+    uint16_t rpu_format;
+    uint8_t vdr_rpu_profile;
+    uint8_t vdr_rpu_level;
+    uint8_t chroma_resampling_explicit_filter_flag;
+    uint8_t coef_data_type; /* informative, lavc always converts to fixed */
+    uint8_t coef_log2_denom;
+    uint8_t vdr_rpu_normalized_idc;
+    uint8_t bl_video_full_range_flag;
+    uint8_t bl_bit_depth; /* [8, 16] */
+    uint8_t el_bit_depth; /* [8, 16] */
+    uint8_t vdr_bit_depth; /* [8, 16] */
+    uint8_t spatial_resampling_filter_flag;
+    uint8_t el_spatial_resampling_filter_flag;
+    uint8_t disable_residual_flag;
+    uint8_t ext_mapping_idc_0_4; /* extended base layer inverse mapping indicator */
+    uint8_t ext_mapping_idc_5_7; /* reserved */
+} AVDOVIRpuDataHeader;
+
+enum AVDOVIMappingMethod {
+    AV_DOVI_MAPPING_POLYNOMIAL = 0,
+    AV_DOVI_MAPPING_MMR = 1,
+};
+
+/**
+ * Coefficients of a piece-wise function. The pieces of the function span the
+ * value ranges between two adjacent pivot values.
+ */
+#define AV_DOVI_MAX_PIECES 8
+typedef struct AVDOVIReshapingCurve {
+    uint8_t num_pivots;                         /* [2, 9] */
+    uint16_t pivots[AV_DOVI_MAX_PIECES + 1];    /* sorted ascending */
+    enum AVDOVIMappingMethod mapping_idc[AV_DOVI_MAX_PIECES];
+    /* AV_DOVI_MAPPING_POLYNOMIAL */
+    uint8_t poly_order[AV_DOVI_MAX_PIECES];     /* [1, 2] */
+    int64_t poly_coef[AV_DOVI_MAX_PIECES][3];   /* x^0, x^1, x^2 */
+    /* AV_DOVI_MAPPING_MMR */
+    uint8_t mmr_order[AV_DOVI_MAX_PIECES];      /* [1, 3] */
+    int64_t mmr_constant[AV_DOVI_MAX_PIECES];
+    int64_t mmr_coef[AV_DOVI_MAX_PIECES][3/* order - 1 */][7];
+} AVDOVIReshapingCurve;
+
+enum AVDOVINLQMethod {
+    AV_DOVI_NLQ_NONE = -1,
+    AV_DOVI_NLQ_LINEAR_DZ = 0,
+};
+
+/**
+ * Coefficients of the non-linear inverse quantization. For the interpretation
+ * of these, see ETSI GS CCM 001.
+ */
+typedef struct AVDOVINLQParams {
+    uint16_t nlq_offset;
+    uint64_t vdr_in_max;
+    /* AV_DOVI_NLQ_LINEAR_DZ */
+    uint64_t linear_deadzone_slope;
+    uint64_t linear_deadzone_threshold;
+} AVDOVINLQParams;
+
+/**
+ * Dolby Vision RPU data mapping parameters.
+ *
+ * @note sizeof(AVDOVIDataMapping) is not part of the public ABI.
+ */
+typedef struct AVDOVIDataMapping {
+    uint8_t vdr_rpu_id;
+    uint8_t mapping_color_space;
+    uint8_t mapping_chroma_format_idc;
+    AVDOVIReshapingCurve curves[3]; /* per component */
+
+    /* Non-linear inverse quantization */
+    enum AVDOVINLQMethod nlq_method_idc;
+    uint32_t num_x_partitions;
+    uint32_t num_y_partitions;
+    AVDOVINLQParams nlq[3]; /* per component */
+    uint16_t nlq_pivots[2];
+} AVDOVIDataMapping;
+
+/**
+ * Dolby Vision RPU colorspace metadata parameters.
+ *
+ * @note sizeof(AVDOVIColorMetadata) is not part of the public ABI.
+ */
+typedef struct AVDOVIColorMetadata {
+    uint8_t dm_metadata_id;
+    uint8_t scene_refresh_flag;
+
+    /**
+     * Coefficients of the custom Dolby Vision IPT-PQ matrices. These are to be
+     * used instead of the matrices indicated by the frame's colorspace tags.
+     * The output of rgb_to_lms_matrix is to be fed into a BT.2020 LMS->RGB
+     * matrix based on a Hunt-Pointer-Estevez transform, but without any
+     * crosstalk. (See the definition of the ICtCp colorspace for more
+     * information.)
+     */
+    AVRational ycc_to_rgb_matrix[9]; /* before PQ linearization */
+    AVRational ycc_to_rgb_offset[3]; /* input offset of neutral value */
+    AVRational rgb_to_lms_matrix[9]; /* after PQ linearization */
+
+    /**
+     * Extra signal metadata (see Dolby patents for more info).
+     */
+    uint16_t signal_eotf;
+    uint16_t signal_eotf_param0;
+    uint16_t signal_eotf_param1;
+    uint32_t signal_eotf_param2;
+    uint8_t signal_bit_depth;
+    uint8_t signal_color_space;
+    uint8_t signal_chroma_format;
+    uint8_t signal_full_range_flag; /* [0, 3] */
+    uint16_t source_min_pq;
+    uint16_t source_max_pq;
+    uint16_t source_diagonal;
+} AVDOVIColorMetadata;
+
+typedef struct AVDOVIDmLevel1 {
+    /* Per-frame brightness metadata */
+    uint16_t min_pq;
+    uint16_t max_pq;
+    uint16_t avg_pq;
+} AVDOVIDmLevel1;
+
+typedef struct AVDOVIDmLevel2 {
+    /* Usually derived from level 8 (at different levels) */
+    uint16_t target_max_pq;
+    uint16_t trim_slope;
+    uint16_t trim_offset;
+    uint16_t trim_power;
+    uint16_t trim_chroma_weight;
+    uint16_t trim_saturation_gain;
+    int16_t ms_weight;
+} AVDOVIDmLevel2;
+
+typedef struct AVDOVIDmLevel3 {
+    uint16_t min_pq_offset;
+    uint16_t max_pq_offset;
+    uint16_t avg_pq_offset;
+} AVDOVIDmLevel3;
+
+typedef struct AVDOVIDmLevel4 {
+    uint16_t anchor_pq;
+    uint16_t anchor_power;
+} AVDOVIDmLevel4;
+
+typedef struct AVDOVIDmLevel5 {
+    /* Active area definition */
+    uint16_t left_offset;
+    uint16_t right_offset;
+    uint16_t top_offset;
+    uint16_t bottom_offset;
+} AVDOVIDmLevel5;
+
+typedef struct AVDOVIDmLevel6 {
+    /* Static HDR10 metadata */
+    uint16_t max_luminance;
+    uint16_t min_luminance;
+    uint16_t max_cll;
+    uint16_t max_fall;
+} AVDOVIDmLevel6;
+
+typedef struct AVDOVIDmLevel8 {
+    /* Extended version of level 2 */
+    uint8_t target_display_index;
+    uint16_t trim_slope;
+    uint16_t trim_offset;
+    uint16_t trim_power;
+    uint16_t trim_chroma_weight;
+    uint16_t trim_saturation_gain;
+    uint16_t ms_weight;
+    uint16_t target_mid_contrast;
+    uint16_t clip_trim;
+    uint8_t saturation_vector_field[6];
+    uint8_t hue_vector_field[6];
+} AVDOVIDmLevel8;
+
+typedef struct AVDOVIDmLevel9 {
+    /* Source display characteristics */
+    uint8_t source_primary_index;
+    AVColorPrimariesDesc source_display_primaries;
+} AVDOVIDmLevel9;
+
+typedef struct AVDOVIDmLevel10 {
+    /* Target display characteristics */
+    uint8_t target_display_index;
+    uint16_t target_max_pq;
+    uint16_t target_min_pq;
+    uint8_t target_primary_index;
+    AVColorPrimariesDesc target_display_primaries;
+} AVDOVIDmLevel10;
+
+typedef struct AVDOVIDmLevel11 {
+    uint8_t content_type;
+    uint8_t whitepoint;
+    uint8_t reference_mode_flag;
+    uint8_t sharpness;
+    uint8_t noise_reduction;
+    uint8_t mpeg_noise_reduction;
+    uint8_t frame_rate_conversion;
+    uint8_t brightness;
+    uint8_t color;
+} AVDOVIDmLevel11;
+
+typedef struct AVDOVIDmLevel254 {
+    /* DMv2 info block, always present in samples with DMv2 metadata */
+    uint8_t dm_mode;
+    uint8_t dm_version_index;
+} AVDOVIDmLevel254;
+
+typedef struct AVDOVIDmLevel255 {
+    /* Debug block, not really used in samples */
+    uint8_t dm_run_mode;
+    uint8_t dm_run_version;
+    uint8_t dm_debug[4];
+} AVDOVIDmLevel255;
+
+/**
+ * Dolby Vision metadata extension block. Dynamic extension blocks may change
+ * from frame to frame, while static blocks are constant throughout the entire
+ * sequence.
+ *
+ * @note sizeof(AVDOVIDmData) is not part of the public API.
+ */
+typedef struct AVDOVIDmData {
+    uint8_t level; /* [1, 255] */
+    union {
+        AVDOVIDmLevel1 l1; /* dynamic */
+        AVDOVIDmLevel2 l2; /* dynamic, may appear multiple times */
+        AVDOVIDmLevel3 l3; /* dynamic */
+        AVDOVIDmLevel4 l4; /* dynamic */
+        AVDOVIDmLevel5 l5; /* dynamic */
+        AVDOVIDmLevel6 l6; /* static */
+        /* level 7 is currently unused */
+        AVDOVIDmLevel8 l8; /* dynamic, may appear multiple times */
+        AVDOVIDmLevel9 l9; /* dynamic */
+        AVDOVIDmLevel10 l10; /* static, may appear multiple times */
+        AVDOVIDmLevel11 l11; /* dynamic */
+        AVDOVIDmLevel254 l254; /* static */
+        AVDOVIDmLevel255 l255; /* static */
+    };
+} AVDOVIDmData;
+
+/**
+ * Combined struct representing a combination of header, mapping and color
+ * metadata, for attaching to frames as side data.
+ *
+ * @note The struct must be allocated with av_dovi_metadata_alloc() and
+ *       its size is not a part of the public ABI.
+ */
+
+typedef struct AVDOVIMetadata {
+    /**
+     * Offset in bytes from the beginning of this structure at which the
+     * respective structs start.
+     */
+    size_t header_offset;   /* AVDOVIRpuDataHeader */
+    size_t mapping_offset;  /* AVDOVIDataMapping */
+    size_t color_offset;    /* AVDOVIColorMetadata */
+
+    size_t ext_block_offset; /* offset to start of ext blocks array */
+    size_t ext_block_size; /* size per element */
+    int num_ext_blocks; /* number of extension blocks */
+
+    /* static limit on num_ext_blocks, derived from bitstream limitations */
+#define AV_DOVI_MAX_EXT_BLOCKS 32
+} AVDOVIMetadata;
+
+static av_always_inline AVDOVIRpuDataHeader *
+av_dovi_get_header(const AVDOVIMetadata *data)
+{
+    return (AVDOVIRpuDataHeader *)((uint8_t *) data + data->header_offset);
+}
+
+static av_always_inline AVDOVIDataMapping *
+av_dovi_get_mapping(const AVDOVIMetadata *data)
+{
+    return (AVDOVIDataMapping *)((uint8_t *) data + data->mapping_offset);
+}
+
+static av_always_inline AVDOVIColorMetadata *
+av_dovi_get_color(const AVDOVIMetadata *data)
+{
+    return (AVDOVIColorMetadata *)((uint8_t *) data + data->color_offset);
+}
+
+static av_always_inline AVDOVIDmData *
+av_dovi_get_ext(const AVDOVIMetadata *data, int index)
+{
+    return (AVDOVIDmData *)((uint8_t *) data + data->ext_block_offset +
+                            data->ext_block_size * index);
+}
+
+/**
+ * Find an extension block with a given level, or NULL. In the case of
+ * multiple extension blocks, only the first is returned.
+ */
+AVDOVIDmData *av_dovi_find_level(const AVDOVIMetadata *data, uint8_t level);
+
+/**
+ * Allocate an AVDOVIMetadata structure and initialize its
+ * fields to default values.
+ *
+ * @param size If this parameter is non-NULL, the size in bytes of the
+ *             allocated struct will be written here on success
+ *
+ * @return the newly allocated struct or NULL on failure
+ */
+AVDOVIMetadata *av_dovi_metadata_alloc(size_t *size);
+
+#endif /* AVUTIL_DOVI_META_H */

ffmpeg/libavutil/downmix_info.c

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2014 Tim Walker <tdskywalker@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "downmix_info.h"
+#include "frame.h"
+
+AVDownmixInfo *av_downmix_info_update_side_data(AVFrame *frame)
+{
+    AVFrameSideData *side_data;
+
+    side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_DOWNMIX_INFO);
+
+    if (!side_data) {
+        side_data = av_frame_new_side_data(frame, AV_FRAME_DATA_DOWNMIX_INFO,
+                                           sizeof(AVDownmixInfo));
+        if (side_data)
+            memset(side_data->data, 0, sizeof(AVDownmixInfo));
+    }
+
+    if (!side_data)
+        return NULL;
+
+    return (AVDownmixInfo*)side_data->data;
+}

ffmpeg/libavutil/downmix_info.h

@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2014 Tim Walker <tdskywalker@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_DOWNMIX_INFO_H
+#define AVUTIL_DOWNMIX_INFO_H
+
+#include "frame.h"
+
+/**
+ * @file
+ * audio downmix medatata
+ */
+
+/**
+ * @addtogroup lavu_audio
+ * @{
+ */
+
+/**
+ * @defgroup downmix_info Audio downmix metadata
+ * @{
+ */
+
+/**
+ * Possible downmix types.
+ */
+enum AVDownmixType {
+    AV_DOWNMIX_TYPE_UNKNOWN, /**< Not indicated. */
+    AV_DOWNMIX_TYPE_LORO,    /**< Lo/Ro 2-channel downmix (Stereo). */
+    AV_DOWNMIX_TYPE_LTRT,    /**< Lt/Rt 2-channel downmix, Dolby Surround compatible. */
+    AV_DOWNMIX_TYPE_DPLII,   /**< Lt/Rt 2-channel downmix, Dolby Pro Logic II compatible. */
+    AV_DOWNMIX_TYPE_NB       /**< Number of downmix types. Not part of ABI. */
+};
+
+/**
+ * This structure describes optional metadata relevant to a downmix procedure.
+ *
+ * All fields are set by the decoder to the value indicated in the audio
+ * bitstream (if present), or to a "sane" default otherwise.
+ */
+typedef struct AVDownmixInfo {
+    /**
+     * Type of downmix preferred by the mastering engineer.
+     */
+    enum AVDownmixType preferred_downmix_type;
+
+    /**
+     * Absolute scale factor representing the nominal level of the center
+     * channel during a regular downmix.
+     */
+    double center_mix_level;
+
+    /**
+     * Absolute scale factor representing the nominal level of the center
+     * channel during an Lt/Rt compatible downmix.
+     */
+    double center_mix_level_ltrt;
+
+    /**
+     * Absolute scale factor representing the nominal level of the surround
+     * channels during a regular downmix.
+     */
+    double surround_mix_level;
+
+    /**
+     * Absolute scale factor representing the nominal level of the surround
+     * channels during an Lt/Rt compatible downmix.
+     */
+    double surround_mix_level_ltrt;
+
+    /**
+     * Absolute scale factor representing the level at which the LFE data is
+     * mixed into L/R channels during downmixing.
+     */
+    double lfe_mix_level;
+} AVDownmixInfo;
+
+/**
+ * Get a frame's AV_FRAME_DATA_DOWNMIX_INFO side data for editing.
+ *
+ * If the side data is absent, it is created and added to the frame.
+ *
+ * @param frame the frame for which the side data is to be obtained or created
+ *
+ * @return the AVDownmixInfo structure to be edited by the caller, or NULL if
+ *         the structure cannot be allocated.
+ */
+AVDownmixInfo *av_downmix_info_update_side_data(AVFrame *frame);
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_DOWNMIX_INFO_H */

ffmpeg/libavutil/dynarray.h

@@ -0,0 +1,70 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_DYNARRAY_H
+#define AVUTIL_DYNARRAY_H
+
+#include "log.h"
+#include "mem.h"
+
+/**
+ * Add an element to a dynamic array.
+ *
+ * The array is reallocated when its number of elements reaches powers of 2.
+ * Therefore, the amortized cost of adding an element is constant.
+ *
+ * In case of success, the pointer to the array is updated in order to
+ * point to the new grown array, and the size is incremented.
+ *
+ * @param av_size_max  maximum size of the array, usually the MAX macro of
+ *                     the type of the size
+ * @param av_elt_size  size of the elements in the array, in bytes
+ * @param av_array     pointer to the array, must be a lvalue
+ * @param av_size      size of the array, must be an integer lvalue
+ * @param av_success   statement to execute on success; at this point, the
+ *                     size variable is not yet incremented
+ * @param av_failure   statement to execute on failure; if this happens, the
+ *                     array and size are not changed; the statement can end
+ *                     with a return or a goto
+ */
+#define FF_DYNARRAY_ADD(av_size_max, av_elt_size, av_array, av_size, \
+                        av_success, av_failure) \
+    do { \
+        size_t av_size_new = (av_size); \
+        if (!((av_size) & ((av_size) - 1))) { \
+            av_size_new = (av_size) ? (av_size) << 1 : 1; \
+            if (av_size_new > (av_size_max) / (av_elt_size)) { \
+                av_size_new = 0; \
+            } else { \
+                void *av_array_new = \
+                    av_realloc((av_array), av_size_new * (av_elt_size)); \
+                if (!av_array_new) \
+                    av_size_new = 0; \
+                else \
+                    (av_array) = av_array_new; \
+            } \
+        } \
+        if (av_size_new) { \
+            { av_success } \
+            (av_size)++; \
+        } else { \
+            av_failure \
+        } \
+    } while (0)
+
+#endif /* AVUTIL_DYNARRAY_H */

ffmpeg/libavutil/emms.h

@@ -0,0 +1,66 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_EMMS_H
+#define AVUTIL_EMMS_H
+
+#include "config.h"
+#include "libavutil/attributes.h"
+
+#if ARCH_X86
+
+void avpriv_emms_asm(void);
+
+#if HAVE_MMX_INLINE
+#ifndef __MMX__
+#include "libavutil/cpu.h"
+#endif
+
+#   define emms_c emms_c
+/**
+ * Empty mmx state.
+ * this must be called between any dsp function and float/double code.
+ * for example sin(); dsp->idct_put(); emms_c(); cos()
+ * Note, *alloc() and *free() also use float code in some libc implementations
+ * thus this also applies to them or any function using them.
+ */
+static av_always_inline void emms_c(void)
+{
+/* Some inlined functions may also use mmx instructions regardless of
+ * runtime cpuflags. With that in mind, we unconditionally empty the
+ * mmx state if the target cpu chosen at configure time supports it.
+ */
+#if !defined(__MMX__)
+    if(av_get_cpu_flags() & AV_CPU_FLAG_MMX)
+#endif
+        __asm__ volatile ("emms" ::: "memory");
+}
+#elif HAVE_MMX && HAVE_MM_EMPTY
+#   include <mmintrin.h>
+#   define emms_c _mm_empty
+#elif HAVE_MMX_EXTERNAL
+#   define emms_c avpriv_emms_asm
+#endif /* HAVE_MMX_INLINE */
+
+#endif /* ARCH_X86 */
+
+#ifndef emms_c
+#   define emms_c() do {} while(0)
+#endif
+
+#endif /* AVUTIL_EMMS_H */

ffmpeg/libavutil/encryption_info.c

@@ -0,0 +1,343 @@
+/**
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+
+#include "encryption_info.h"
+#include "mem.h"
+#include "intreadwrite.h"
+
+#define FF_ENCRYPTION_INFO_EXTRA 24
+
+// The format of the AVEncryptionInfo side data:
+// u32be scheme
+// u32be crypt_byte_block
+// u32be skip_byte_block
+// u32be key_id_size
+// u32be iv_size
+// u32be subsample_count
+// u8[key_id_size] key_id
+// u8[iv_size] iv
+// {
+//   u32be bytes_of_clear_data
+//   u32be bytes_of_protected_data
+// }[subsample_count]
+
+AVEncryptionInfo *av_encryption_info_alloc(uint32_t subsample_count, uint32_t key_id_size, uint32_t iv_size)
+{
+    AVEncryptionInfo *info;
+
+    info = av_mallocz(sizeof(*info));
+    if (!info)
+        return NULL;
+
+    info->key_id = av_mallocz(key_id_size);
+    info->key_id_size = key_id_size;
+    info->iv = av_mallocz(iv_size);
+    info->iv_size = iv_size;
+    info->subsamples = av_calloc(subsample_count, sizeof(*info->subsamples));
+    info->subsample_count = subsample_count;
+
+    // Allow info->subsamples to be NULL if there are no subsamples.
+    if (!info->key_id || !info->iv || (!info->subsamples && subsample_count)) {
+        av_encryption_info_free(info);
+        return NULL;
+    }
+
+    return info;
+}
+
+AVEncryptionInfo *av_encryption_info_clone(const AVEncryptionInfo *info)
+{
+    AVEncryptionInfo *ret;
+
+    ret = av_encryption_info_alloc(info->subsample_count, info->key_id_size, info->iv_size);
+    if (!ret)
+        return NULL;
+
+    ret->scheme = info->scheme;
+    ret->crypt_byte_block = info->crypt_byte_block;
+    ret->skip_byte_block = info->skip_byte_block;
+    memcpy(ret->iv, info->iv, info->iv_size);
+    memcpy(ret->key_id, info->key_id, info->key_id_size);
+    memcpy(ret->subsamples, info->subsamples, sizeof(*info->subsamples) * info->subsample_count);
+    return ret;
+}
+
+void av_encryption_info_free(AVEncryptionInfo *info)
+{
+    if (info) {
+        av_free(info->key_id);
+        av_free(info->iv);
+        av_free(info->subsamples);
+        av_free(info);
+    }
+}
+
+AVEncryptionInfo *av_encryption_info_get_side_data(const uint8_t* buffer, size_t size)
+{
+    AVEncryptionInfo *info;
+    uint64_t key_id_size, iv_size, subsample_count, i;
+
+    if (!buffer || size < FF_ENCRYPTION_INFO_EXTRA)
+        return NULL;
+
+    key_id_size = AV_RB32(buffer + 12);
+    iv_size = AV_RB32(buffer + 16);
+    subsample_count = AV_RB32(buffer + 20);
+
+    if (size < FF_ENCRYPTION_INFO_EXTRA + key_id_size + iv_size + subsample_count * 8)
+        return NULL;
+
+    info = av_encryption_info_alloc(subsample_count, key_id_size, iv_size);
+    if (!info)
+        return NULL;
+
+    info->scheme = AV_RB32(buffer);
+    info->crypt_byte_block = AV_RB32(buffer + 4);
+    info->skip_byte_block = AV_RB32(buffer + 8);
+    memcpy(info->key_id, buffer + 24, key_id_size);
+    memcpy(info->iv, buffer + key_id_size + 24, iv_size);
+
+    buffer += key_id_size + iv_size + 24;
+    for (i = 0; i < subsample_count; i++) {
+        info->subsamples[i].bytes_of_clear_data = AV_RB32(buffer);
+        info->subsamples[i].bytes_of_protected_data = AV_RB32(buffer + 4);
+        buffer += 8;
+    }
+
+    return info;
+}
+
+uint8_t *av_encryption_info_add_side_data(const AVEncryptionInfo *info, size_t *size)
+{
+    uint8_t *buffer, *cur_buffer;
+    uint32_t i;
+
+    if (UINT32_MAX - FF_ENCRYPTION_INFO_EXTRA < info->key_id_size ||
+        UINT32_MAX - FF_ENCRYPTION_INFO_EXTRA - info->key_id_size < info->iv_size ||
+        (UINT32_MAX - FF_ENCRYPTION_INFO_EXTRA - info->key_id_size - info->iv_size) / 8 < info->subsample_count) {
+        return NULL;
+    }
+
+    *size = FF_ENCRYPTION_INFO_EXTRA + info->key_id_size + info->iv_size +
+            (info->subsample_count * 8);
+    cur_buffer = buffer = av_malloc(*size);
+    if (!buffer)
+        return NULL;
+
+    AV_WB32(cur_buffer,      info->scheme);
+    AV_WB32(cur_buffer +  4, info->crypt_byte_block);
+    AV_WB32(cur_buffer +  8, info->skip_byte_block);
+    AV_WB32(cur_buffer + 12, info->key_id_size);
+    AV_WB32(cur_buffer + 16, info->iv_size);
+    AV_WB32(cur_buffer + 20, info->subsample_count);
+    cur_buffer += 24;
+    memcpy(cur_buffer, info->key_id, info->key_id_size);
+    cur_buffer += info->key_id_size;
+    memcpy(cur_buffer, info->iv, info->iv_size);
+    cur_buffer += info->iv_size;
+    for (i = 0; i < info->subsample_count; i++) {
+        AV_WB32(cur_buffer, info->subsamples[i].bytes_of_clear_data);
+        AV_WB32(cur_buffer + 4, info->subsamples[i].bytes_of_protected_data);
+        cur_buffer += 8;
+    }
+
+    return buffer;
+}
+
+// The format of the AVEncryptionInitInfo side data:
+// u32be init_info_count
+// {
+//   u32be system_id_size
+//   u32be num_key_ids
+//   u32be key_id_size
+//   u32be data_size
+//   u8[system_id_size] system_id
+//   u8[key_id_size][num_key_id] key_ids
+//   u8[data_size] data
+// }[init_info_count]
+
+#define FF_ENCRYPTION_INIT_INFO_EXTRA 16
+
+AVEncryptionInitInfo *av_encryption_init_info_alloc(
+    uint32_t system_id_size, uint32_t num_key_ids, uint32_t key_id_size, uint32_t data_size)
+{
+    AVEncryptionInitInfo *info;
+    uint32_t i;
+
+    info = av_mallocz(sizeof(*info));
+    if (!info)
+        return NULL;
+
+    info->system_id = av_mallocz(system_id_size);
+    info->system_id_size = system_id_size;
+    info->key_ids = key_id_size ? av_calloc(num_key_ids, sizeof(*info->key_ids)) : NULL;
+    info->num_key_ids = num_key_ids;
+    info->key_id_size = key_id_size;
+    info->data = av_mallocz(data_size);
+    info->data_size = data_size;
+
+    // Allow pointers to be NULL if the size is 0.
+    if ((!info->system_id && system_id_size) || (!info->data && data_size) ||
+        (!info->key_ids && num_key_ids && key_id_size)) {
+        av_encryption_init_info_free(info);
+        return NULL;
+    }
+
+    if (key_id_size) {
+        for (i = 0; i < num_key_ids; i++) {
+            info->key_ids[i] = av_mallocz(key_id_size);
+            if (!info->key_ids[i]) {
+                av_encryption_init_info_free(info);
+                return NULL;
+            }
+        }
+    }
+
+    return info;
+}
+
+void av_encryption_init_info_free(AVEncryptionInitInfo *info)
+{
+    uint32_t i;
+    if (info) {
+        for (i = 0; i < info->num_key_ids; i++) {
+            av_free(info->key_ids[i]);
+        }
+        av_encryption_init_info_free(info->next);
+        av_free(info->system_id);
+        av_free(info->key_ids);
+        av_free(info->data);
+        av_free(info);
+    }
+}
+
+AVEncryptionInitInfo *av_encryption_init_info_get_side_data(
+    const uint8_t *side_data, size_t side_data_size)
+{
+    // |ret| tracks the front of the list, |info| tracks the back.
+    AVEncryptionInitInfo *ret = NULL, *info, *temp_info;
+    uint64_t system_id_size, num_key_ids, key_id_size, data_size, i, j;
+    uint64_t init_info_count;
+
+    if (!side_data || side_data_size < 4)
+        return NULL;
+
+    init_info_count = AV_RB32(side_data);
+    side_data += 4;
+    side_data_size -= 4;
+    for (i = 0; i < init_info_count; i++) {
+        if (side_data_size < FF_ENCRYPTION_INIT_INFO_EXTRA) {
+            av_encryption_init_info_free(ret);
+            return NULL;
+        }
+
+        system_id_size = AV_RB32(side_data);
+        num_key_ids = AV_RB32(side_data + 4);
+        key_id_size = AV_RB32(side_data + 8);
+        data_size = AV_RB32(side_data + 12);
+
+        // UINT32_MAX + UINT32_MAX + UINT32_MAX * UINT32_MAX == UINT64_MAX
+        if (side_data_size - FF_ENCRYPTION_INIT_INFO_EXTRA < system_id_size + data_size + num_key_ids * key_id_size) {
+            av_encryption_init_info_free(ret);
+            return NULL;
+        }
+        side_data += FF_ENCRYPTION_INIT_INFO_EXTRA;
+        side_data_size -= FF_ENCRYPTION_INIT_INFO_EXTRA;
+
+        temp_info = av_encryption_init_info_alloc(system_id_size, num_key_ids, key_id_size, data_size);
+        if (!temp_info) {
+            av_encryption_init_info_free(ret);
+            return NULL;
+        }
+        if (i == 0) {
+            info = ret = temp_info;
+        } else {
+            info->next = temp_info;
+            info = temp_info;
+        }
+
+        memcpy(info->system_id, side_data, system_id_size);
+        side_data += system_id_size;
+        side_data_size -= system_id_size;
+        for (j = 0; j < num_key_ids; j++) {
+            memcpy(info->key_ids[j], side_data, key_id_size);
+            side_data += key_id_size;
+            side_data_size -= key_id_size;
+        }
+        memcpy(info->data, side_data, data_size);
+        side_data += data_size;
+        side_data_size -= data_size;
+    }
+
+    return ret;
+}
+
+uint8_t *av_encryption_init_info_add_side_data(const AVEncryptionInitInfo *info, size_t *side_data_size)
+{
+    const AVEncryptionInitInfo *cur_info;
+    uint8_t *buffer, *cur_buffer;
+    uint32_t i, init_info_count;
+    uint64_t temp_side_data_size;
+
+    temp_side_data_size = 4;
+    init_info_count = 0;
+    for (cur_info = info; cur_info; cur_info = cur_info->next) {
+        temp_side_data_size += (uint64_t)FF_ENCRYPTION_INIT_INFO_EXTRA + cur_info->system_id_size + cur_info->data_size;
+        if (init_info_count == UINT32_MAX || temp_side_data_size > UINT32_MAX) {
+            return NULL;
+        }
+        init_info_count++;
+
+        if (cur_info->num_key_ids) {
+            temp_side_data_size += (uint64_t)cur_info->num_key_ids * cur_info->key_id_size;
+            if (temp_side_data_size > UINT32_MAX) {
+                return NULL;
+            }
+        }
+    }
+    *side_data_size = temp_side_data_size;
+
+    cur_buffer = buffer = av_malloc(*side_data_size);
+    if (!buffer)
+        return NULL;
+
+    AV_WB32(cur_buffer, init_info_count);
+    cur_buffer += 4;
+    for (cur_info = info; cur_info; cur_info = cur_info->next) {
+        AV_WB32(cur_buffer,      cur_info->system_id_size);
+        AV_WB32(cur_buffer +  4, cur_info->num_key_ids);
+        AV_WB32(cur_buffer +  8, cur_info->key_id_size);
+        AV_WB32(cur_buffer + 12, cur_info->data_size);
+        cur_buffer += 16;
+
+        memcpy(cur_buffer, cur_info->system_id, cur_info->system_id_size);
+        cur_buffer += cur_info->system_id_size;
+        for (i = 0; i < cur_info->num_key_ids; i++) {
+            memcpy(cur_buffer, cur_info->key_ids[i], cur_info->key_id_size);
+            cur_buffer += cur_info->key_id_size;
+        }
+        if (cur_info->data_size > 0) {
+            memcpy(cur_buffer, cur_info->data, cur_info->data_size);
+            cur_buffer += cur_info->data_size;
+        }
+    }
+
+    return buffer;
+}

ffmpeg/libavutil/encryption_info.h

@@ -0,0 +1,205 @@
+/**
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_ENCRYPTION_INFO_H
+#define AVUTIL_ENCRYPTION_INFO_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+typedef struct AVSubsampleEncryptionInfo {
+    /** The number of bytes that are clear. */
+    unsigned int bytes_of_clear_data;
+
+    /**
+     * The number of bytes that are protected.  If using pattern encryption,
+     * the pattern applies to only the protected bytes; if not using pattern
+     * encryption, all these bytes are encrypted.
+     */
+    unsigned int bytes_of_protected_data;
+} AVSubsampleEncryptionInfo;
+
+/**
+ * This describes encryption info for a packet.  This contains frame-specific
+ * info for how to decrypt the packet before passing it to the decoder.
+ *
+ * The size of this struct is not part of the public ABI.
+ */
+typedef struct AVEncryptionInfo {
+    /** The fourcc encryption scheme, in big-endian byte order. */
+    uint32_t scheme;
+
+    /**
+     * Only used for pattern encryption.  This is the number of 16-byte blocks
+     * that are encrypted.
+     */
+    uint32_t crypt_byte_block;
+
+    /**
+     * Only used for pattern encryption.  This is the number of 16-byte blocks
+     * that are clear.
+     */
+    uint32_t skip_byte_block;
+
+    /**
+     * The ID of the key used to encrypt the packet.  This should always be
+     * 16 bytes long, but may be changed in the future.
+     */
+    uint8_t *key_id;
+    uint32_t key_id_size;
+
+    /**
+     * The initialization vector.  This may have been zero-filled to be the
+     * correct block size.  This should always be 16 bytes long, but may be
+     * changed in the future.
+     */
+    uint8_t *iv;
+    uint32_t iv_size;
+
+    /**
+     * An array of subsample encryption info specifying how parts of the sample
+     * are encrypted.  If there are no subsamples, then the whole sample is
+     * encrypted.
+     */
+    AVSubsampleEncryptionInfo *subsamples;
+    uint32_t subsample_count;
+} AVEncryptionInfo;
+
+/**
+ * This describes info used to initialize an encryption key system.
+ *
+ * The size of this struct is not part of the public ABI.
+ */
+typedef struct AVEncryptionInitInfo {
+    /**
+     * A unique identifier for the key system this is for, can be NULL if it
+     * is not known.  This should always be 16 bytes, but may change in the
+     * future.
+     */
+    uint8_t* system_id;
+    uint32_t system_id_size;
+
+    /**
+     * An array of key IDs this initialization data is for.  All IDs are the
+     * same length.  Can be NULL if there are no known key IDs.
+     */
+    uint8_t** key_ids;
+    /** The number of key IDs. */
+    uint32_t num_key_ids;
+    /**
+     * The number of bytes in each key ID.  This should always be 16, but may
+     * change in the future.
+     */
+    uint32_t key_id_size;
+
+    /**
+     * Key-system specific initialization data.  This data is copied directly
+     * from the file and the format depends on the specific key system.  This
+     * can be NULL if there is no initialization data; in that case, there
+     * will be at least one key ID.
+     */
+    uint8_t* data;
+    uint32_t data_size;
+
+    /**
+     * An optional pointer to the next initialization info in the list.
+     */
+    struct AVEncryptionInitInfo *next;
+} AVEncryptionInitInfo;
+
+/**
+ * Allocates an AVEncryptionInfo structure and sub-pointers to hold the given
+ * number of subsamples.  This will allocate pointers for the key ID, IV,
+ * and subsample entries, set the size members, and zero-initialize the rest.
+ *
+ * @param subsample_count The number of subsamples.
+ * @param key_id_size The number of bytes in the key ID, should be 16.
+ * @param iv_size The number of bytes in the IV, should be 16.
+ *
+ * @return The new AVEncryptionInfo structure, or NULL on error.
+ */
+AVEncryptionInfo *av_encryption_info_alloc(uint32_t subsample_count, uint32_t key_id_size, uint32_t iv_size);
+
+/**
+ * Allocates an AVEncryptionInfo structure with a copy of the given data.
+ * @return The new AVEncryptionInfo structure, or NULL on error.
+ */
+AVEncryptionInfo *av_encryption_info_clone(const AVEncryptionInfo *info);
+
+/**
+ * Frees the given encryption info object.  This MUST NOT be used to free the
+ * side-data data pointer, that should use normal side-data methods.
+ */
+void av_encryption_info_free(AVEncryptionInfo *info);
+
+/**
+ * Creates a copy of the AVEncryptionInfo that is contained in the given side
+ * data.  The resulting object should be passed to av_encryption_info_free()
+ * when done.
+ *
+ * @return The new AVEncryptionInfo structure, or NULL on error.
+ */
+AVEncryptionInfo *av_encryption_info_get_side_data(const uint8_t *side_data, size_t side_data_size);
+
+/**
+ * Allocates and initializes side data that holds a copy of the given encryption
+ * info.  The resulting pointer should be either freed using av_free or given
+ * to av_packet_add_side_data().
+ *
+ * @return The new side-data pointer, or NULL.
+ */
+uint8_t *av_encryption_info_add_side_data(
+      const AVEncryptionInfo *info, size_t *side_data_size);
+
+
+/**
+ * Allocates an AVEncryptionInitInfo structure and sub-pointers to hold the
+ * given sizes.  This will allocate pointers and set all the fields.
+ *
+ * @return The new AVEncryptionInitInfo structure, or NULL on error.
+ */
+AVEncryptionInitInfo *av_encryption_init_info_alloc(
+    uint32_t system_id_size, uint32_t num_key_ids, uint32_t key_id_size, uint32_t data_size);
+
+/**
+ * Frees the given encryption init info object.  This MUST NOT be used to free
+ * the side-data data pointer, that should use normal side-data methods.
+ */
+void av_encryption_init_info_free(AVEncryptionInitInfo* info);
+
+/**
+ * Creates a copy of the AVEncryptionInitInfo that is contained in the given
+ * side data.  The resulting object should be passed to
+ * av_encryption_init_info_free() when done.
+ *
+ * @return The new AVEncryptionInitInfo structure, or NULL on error.
+ */
+AVEncryptionInitInfo *av_encryption_init_info_get_side_data(
+    const uint8_t* side_data, size_t side_data_size);
+
+/**
+ * Allocates and initializes side data that holds a copy of the given encryption
+ * init info.  The resulting pointer should be either freed using av_free or
+ * given to av_packet_add_side_data().
+ *
+ * @return The new side-data pointer, or NULL.
+ */
+uint8_t *av_encryption_init_info_add_side_data(
+    const AVEncryptionInitInfo *info, size_t *side_data_size);
+
+#endif /* AVUTIL_ENCRYPTION_INFO_H */

ffmpeg/libavutil/error.c

@@ -0,0 +1,133 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#undef _GNU_SOURCE
+#define _XOPEN_SOURCE 600 /* XSI-compliant version of strerror_r */
+#include <stdio.h>
+#include <string.h>
+#include "config.h"
+#include "avstring.h"
+#include "error.h"
+#include "macros.h"
+
+struct error_entry {
+    int num;
+    const char *tag;
+    const char *str;
+};
+
+#define ERROR_TAG(tag) AVERROR_##tag, #tag
+#define EERROR_TAG(tag) AVERROR(tag), #tag
+#define AVERROR_INPUT_AND_OUTPUT_CHANGED (AVERROR_INPUT_CHANGED | AVERROR_OUTPUT_CHANGED)
+static const struct error_entry error_entries[] = {
+    { ERROR_TAG(BSF_NOT_FOUND),      "Bitstream filter not found"                     },
+    { ERROR_TAG(BUG),                "Internal bug, should not have happened"         },
+    { ERROR_TAG(BUG2),               "Internal bug, should not have happened"         },
+    { ERROR_TAG(BUFFER_TOO_SMALL),   "Buffer too small"                               },
+    { ERROR_TAG(DECODER_NOT_FOUND),  "Decoder not found"                              },
+    { ERROR_TAG(DEMUXER_NOT_FOUND),  "Demuxer not found"                              },
+    { ERROR_TAG(ENCODER_NOT_FOUND),  "Encoder not found"                              },
+    { ERROR_TAG(EOF),                "End of file"                                    },
+    { ERROR_TAG(EXIT),               "Immediate exit requested"                       },
+    { ERROR_TAG(EXTERNAL),           "Generic error in an external library"           },
+    { ERROR_TAG(FILTER_NOT_FOUND),   "Filter not found"                               },
+    { ERROR_TAG(INPUT_CHANGED),      "Input changed"                                  },
+    { ERROR_TAG(INVALIDDATA),        "Invalid data found when processing input"       },
+    { ERROR_TAG(MUXER_NOT_FOUND),    "Muxer not found"                                },
+    { ERROR_TAG(OPTION_NOT_FOUND),   "Option not found"                               },
+    { ERROR_TAG(OUTPUT_CHANGED),     "Output changed"                                 },
+    { ERROR_TAG(PATCHWELCOME),       "Not yet implemented in FFmpeg, patches welcome" },
+    { ERROR_TAG(PROTOCOL_NOT_FOUND), "Protocol not found"                             },
+    { ERROR_TAG(STREAM_NOT_FOUND),   "Stream not found"                               },
+    { ERROR_TAG(UNKNOWN),            "Unknown error occurred"                         },
+    { ERROR_TAG(EXPERIMENTAL),       "Experimental feature"                           },
+    { ERROR_TAG(INPUT_AND_OUTPUT_CHANGED), "Input and output changed"                 },
+    { ERROR_TAG(HTTP_BAD_REQUEST),   "Server returned 400 Bad Request"         },
+    { ERROR_TAG(HTTP_UNAUTHORIZED),  "Server returned 401 Unauthorized (authorization failed)" },
+    { ERROR_TAG(HTTP_FORBIDDEN),     "Server returned 403 Forbidden (access denied)" },
+    { ERROR_TAG(HTTP_NOT_FOUND),     "Server returned 404 Not Found"           },
+    { ERROR_TAG(HTTP_TOO_MANY_REQUESTS), "Server returned 429 Too Many Requests"      },
+    { ERROR_TAG(HTTP_OTHER_4XX),     "Server returned 4XX Client Error, but not one of 40{0,1,3,4}" },
+    { ERROR_TAG(HTTP_SERVER_ERROR),  "Server returned 5XX Server Error reply" },
+#if !HAVE_STRERROR_R
+    { EERROR_TAG(E2BIG),             "Argument list too long" },
+    { EERROR_TAG(EACCES),            "Permission denied" },
+    { EERROR_TAG(EAGAIN),            "Resource temporarily unavailable" },
+    { EERROR_TAG(EBADF),             "Bad file descriptor" },
+    { EERROR_TAG(EBUSY),             "Device or resource busy" },
+    { EERROR_TAG(ECHILD),            "No child processes" },
+    { EERROR_TAG(EDEADLK),           "Resource deadlock avoided" },
+    { EERROR_TAG(EDOM),              "Numerical argument out of domain" },
+    { EERROR_TAG(EEXIST),            "File exists" },
+    { EERROR_TAG(EFAULT),            "Bad address" },
+    { EERROR_TAG(EFBIG),             "File too large" },
+    { EERROR_TAG(EILSEQ),            "Illegal byte sequence" },
+    { EERROR_TAG(EINTR),             "Interrupted system call" },
+    { EERROR_TAG(EINVAL),            "Invalid argument" },
+    { EERROR_TAG(EIO),               "I/O error" },
+    { EERROR_TAG(EISDIR),            "Is a directory" },
+    { EERROR_TAG(EMFILE),            "Too many open files" },
+    { EERROR_TAG(EMLINK),            "Too many links" },
+    { EERROR_TAG(ENAMETOOLONG),      "File name too long" },
+    { EERROR_TAG(ENFILE),            "Too many open files in system" },
+    { EERROR_TAG(ENODEV),            "No such device" },
+    { EERROR_TAG(ENOENT),            "No such file or directory" },
+    { EERROR_TAG(ENOEXEC),           "Exec format error" },
+    { EERROR_TAG(ENOLCK),            "No locks available" },
+    { EERROR_TAG(ENOMEM),            "Cannot allocate memory" },
+    { EERROR_TAG(ENOSPC),            "No space left on device" },
+    { EERROR_TAG(ENOSYS),            "Function not implemented" },
+    { EERROR_TAG(ENOTDIR),           "Not a directory" },
+    { EERROR_TAG(ENOTEMPTY),         "Directory not empty" },
+    { EERROR_TAG(ENOTTY),            "Inappropriate I/O control operation" },
+    { EERROR_TAG(ENXIO),             "No such device or address" },
+    { EERROR_TAG(EPERM),             "Operation not permitted" },
+    { EERROR_TAG(EPIPE),             "Broken pipe" },
+    { EERROR_TAG(ERANGE),            "Result too large" },
+    { EERROR_TAG(EROFS),             "Read-only file system" },
+    { EERROR_TAG(ESPIPE),            "Illegal seek" },
+    { EERROR_TAG(ESRCH),             "No such process" },
+    { EERROR_TAG(EXDEV),             "Cross-device link" },
+#endif
+};
+
+int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
+{
+    int ret = 0, i;
+    const struct error_entry *entry = NULL;
+
+    for (i = 0; i < FF_ARRAY_ELEMS(error_entries); i++) {
+        if (errnum == error_entries[i].num) {
+            entry = &error_entries[i];
+            break;
+        }
+    }
+    if (entry) {
+        av_strlcpy(errbuf, entry->str, errbuf_size);
+    } else {
+#if HAVE_STRERROR_R
+        ret = AVERROR(strerror_r(AVUNERROR(errnum), errbuf, errbuf_size));
+#else
+        ret = -1;
+#endif
+        if (ret < 0)
+            snprintf(errbuf, errbuf_size, "Error number %d occurred", errnum);
+    }
+
+    return ret;
+}

ffmpeg/libavutil/error.h

@@ -0,0 +1,129 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * error code definitions
+ */
+
+#ifndef AVUTIL_ERROR_H
+#define AVUTIL_ERROR_H
+
+#include <errno.h>
+#include <stddef.h>
+
+#include "macros.h"
+
+/**
+ * @addtogroup lavu_error
+ *
+ * @{
+ */
+
+
+/* error handling */
+#if EDOM > 0
+#define AVERROR(e) (-(e))   ///< Returns a negative error code from a POSIX error code, to return from library functions.
+#define AVUNERROR(e) (-(e)) ///< Returns a POSIX error code from a library function error return value.
+#else
+/* Some platforms have E* and errno already negated. */
+#define AVERROR(e) (e)
+#define AVUNERROR(e) (e)
+#endif
+
+#define FFERRTAG(a, b, c, d) (-(int)MKTAG(a, b, c, d))
+
+#define AVERROR_BSF_NOT_FOUND      FFERRTAG(0xF8,'B','S','F') ///< Bitstream filter not found
+#define AVERROR_BUG                FFERRTAG( 'B','U','G','!') ///< Internal bug, also see AVERROR_BUG2
+#define AVERROR_BUFFER_TOO_SMALL   FFERRTAG( 'B','U','F','S') ///< Buffer too small
+#define AVERROR_DECODER_NOT_FOUND  FFERRTAG(0xF8,'D','E','C') ///< Decoder not found
+#define AVERROR_DEMUXER_NOT_FOUND  FFERRTAG(0xF8,'D','E','M') ///< Demuxer not found
+#define AVERROR_ENCODER_NOT_FOUND  FFERRTAG(0xF8,'E','N','C') ///< Encoder not found
+#define AVERROR_EOF                FFERRTAG( 'E','O','F',' ') ///< End of file
+#define AVERROR_EXIT               FFERRTAG( 'E','X','I','T') ///< Immediate exit was requested; the called function should not be restarted
+#define AVERROR_EXTERNAL           FFERRTAG( 'E','X','T',' ') ///< Generic error in an external library
+#define AVERROR_FILTER_NOT_FOUND   FFERRTAG(0xF8,'F','I','L') ///< Filter not found
+#define AVERROR_INVALIDDATA        FFERRTAG( 'I','N','D','A') ///< Invalid data found when processing input
+#define AVERROR_MUXER_NOT_FOUND    FFERRTAG(0xF8,'M','U','X') ///< Muxer not found
+#define AVERROR_OPTION_NOT_FOUND   FFERRTAG(0xF8,'O','P','T') ///< Option not found
+#define AVERROR_PATCHWELCOME       FFERRTAG( 'P','A','W','E') ///< Not yet implemented in FFmpeg, patches welcome
+#define AVERROR_PROTOCOL_NOT_FOUND FFERRTAG(0xF8,'P','R','O') ///< Protocol not found
+
+#define AVERROR_STREAM_NOT_FOUND   FFERRTAG(0xF8,'S','T','R') ///< Stream not found
+/**
+ * This is semantically identical to AVERROR_BUG
+ * it has been introduced in Libav after our AVERROR_BUG and with a modified value.
+ */
+#define AVERROR_BUG2               FFERRTAG( 'B','U','G',' ')
+#define AVERROR_UNKNOWN            FFERRTAG( 'U','N','K','N') ///< Unknown error, typically from an external library
+#define AVERROR_EXPERIMENTAL       (-0x2bb2afa8) ///< Requested feature is flagged experimental. Set strict_std_compliance if you really want to use it.
+#define AVERROR_INPUT_CHANGED      (-0x636e6701) ///< Input changed between calls. Reconfiguration is required. (can be OR-ed with AVERROR_OUTPUT_CHANGED)
+#define AVERROR_OUTPUT_CHANGED     (-0x636e6702) ///< Output changed between calls. Reconfiguration is required. (can be OR-ed with AVERROR_INPUT_CHANGED)
+/* HTTP & RTSP errors */
+#define AVERROR_HTTP_BAD_REQUEST   FFERRTAG(0xF8,'4','0','0')
+#define AVERROR_HTTP_UNAUTHORIZED  FFERRTAG(0xF8,'4','0','1')
+#define AVERROR_HTTP_FORBIDDEN     FFERRTAG(0xF8,'4','0','3')
+#define AVERROR_HTTP_NOT_FOUND     FFERRTAG(0xF8,'4','0','4')
+#define AVERROR_HTTP_TOO_MANY_REQUESTS FFERRTAG(0xF8,'4','2','9')
+#define AVERROR_HTTP_OTHER_4XX     FFERRTAG(0xF8,'4','X','X')
+#define AVERROR_HTTP_SERVER_ERROR  FFERRTAG(0xF8,'5','X','X')
+
+#define AV_ERROR_MAX_STRING_SIZE 64
+
+/**
+ * Put a description of the AVERROR code errnum in errbuf.
+ * In case of failure the global variable errno is set to indicate the
+ * error. Even in case of failure av_strerror() will print a generic
+ * error message indicating the errnum provided to errbuf.
+ *
+ * @param errnum      error code to describe
+ * @param errbuf      buffer to which description is written
+ * @param errbuf_size the size in bytes of errbuf
+ * @return 0 on success, a negative value if a description for errnum
+ * cannot be found
+ */
+int av_strerror(int errnum, char *errbuf, size_t errbuf_size);
+
+/**
+ * Fill the provided buffer with a string containing an error string
+ * corresponding to the AVERROR code errnum.
+ *
+ * @param errbuf         a buffer
+ * @param errbuf_size    size in bytes of errbuf
+ * @param errnum         error code to describe
+ * @return the buffer in input, filled with the error description
+ * @see av_strerror()
+ */
+static inline char *av_make_error_string(char *errbuf, size_t errbuf_size, int errnum)
+{
+    av_strerror(errnum, errbuf, errbuf_size);
+    return errbuf;
+}
+
+/**
+ * Convenience macro, the return value should be used only directly in
+ * function arguments but never stand-alone.
+ */
+#define av_err2str(errnum) \
+    av_make_error_string((char[AV_ERROR_MAX_STRING_SIZE]){0}, AV_ERROR_MAX_STRING_SIZE, errnum)
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_ERROR_H */

ffmpeg/libavutil/eval.c

@@ -0,0 +1,821 @@
+/*
+ * Copyright (c) 2002-2006 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * simple arithmetic expression evaluator.
+ *
+ * see http://joe.hotchkiss.com/programming/eval/eval.html
+ */
+
+#include <float.h>
+#include "attributes.h"
+#include "avutil.h"
+#include "common.h"
+#include "eval.h"
+#include "ffmath.h"
+#include "log.h"
+#include "mathematics.h"
+#include "mem.h"
+#include "sfc64.h"
+#include "time.h"
+#include "avstring.h"
+#include "reverse.h"
+
+typedef struct Parser {
+    const AVClass *class;
+    int stack_index;
+    char *s;
+    const double *const_values;
+    const char * const *const_names;          // NULL terminated
+    double (* const *funcs1)(void *, double a);           // NULL terminated
+    const char * const *func1_names;          // NULL terminated
+    double (* const *funcs2)(void *, double a, double b); // NULL terminated
+    const char * const *func2_names;          // NULL terminated
+    void *opaque;
+    int log_offset;
+    void *log_ctx;
+#define VARS 10
+    double *var;
+    FFSFC64 *prng_state;
+} Parser;
+
+static const AVClass eval_class = {
+    .class_name                = "Eval",
+    .item_name                 = av_default_item_name,
+    .option                    = NULL,
+    .version                   = LIBAVUTIL_VERSION_INT,
+    .log_level_offset_offset   = offsetof(Parser, log_offset),
+    .parent_log_context_offset = offsetof(Parser, log_ctx),
+};
+
+static const struct {
+    double bin_val;
+    double dec_val;
+    int8_t exp;
+} si_prefixes['z' - 'E' + 1] = {
+    ['y'-'E']= { 8.271806125530276749e-25, 1e-24, -24 },
+    ['z'-'E']= { 8.4703294725430034e-22, 1e-21, -21 },
+    ['a'-'E']= { 8.6736173798840355e-19, 1e-18, -18 },
+    ['f'-'E']= { 8.8817841970012523e-16, 1e-15, -15 },
+    ['p'-'E']= { 9.0949470177292824e-13, 1e-12, -12 },
+    ['n'-'E']= { 9.3132257461547852e-10, 1e-9,  -9 },
+    ['u'-'E']= { 9.5367431640625e-7, 1e-6, -6 },
+    ['m'-'E']= { 9.765625e-4, 1e-3, -3 },
+    ['c'-'E']= { 9.8431332023036951e-3, 1e-2, -2 },
+    ['d'-'E']= { 9.921256574801246e-2, 1e-1, -1 },
+    ['h'-'E']= { 1.0159366732596479e2, 1e2, 2 },
+    ['k'-'E']= { 1.024e3, 1e3, 3 },
+    ['K'-'E']= { 1.024e3, 1e3, 3 },
+    ['M'-'E']= { 1.048576e6, 1e6, 6 },
+    ['G'-'E']= { 1.073741824e9, 1e9, 9 },
+    ['T'-'E']= { 1.099511627776e12, 1e12, 12 },
+    ['P'-'E']= { 1.125899906842624e15, 1e15, 15 },
+    ['E'-'E']= { 1.152921504606847e18, 1e18, 18 },
+    ['Z'-'E']= { 1.1805916207174113e21, 1e21, 21 },
+    ['Y'-'E']= { 1.2089258196146292e24, 1e24, 24 },
+};
+
+static const struct {
+    const char *name;
+    double value;
+} constants[] = {
+    { "E",   M_E   },
+    { "PI",  M_PI  },
+    { "PHI", M_PHI },
+    { "QP2LAMBDA", FF_QP2LAMBDA },
+};
+
+double av_strtod(const char *numstr, char **tail)
+{
+    double d;
+    char *next;
+    if(numstr[0]=='0' && (numstr[1]|0x20)=='x') {
+        d = strtoul(numstr, &next, 16);
+    } else
+        d = strtod(numstr, &next);
+    /* if parsing succeeded, check for and interpret postfixes */
+    if (next!=numstr) {
+        if (next[0] == 'd' && next[1] == 'B') {
+            /* treat dB as decibels instead of decibytes */
+            d = ff_exp10(d / 20);
+            next += 2;
+        } else if (*next >= 'E' && *next <= 'z') {
+            int e= si_prefixes[*next - 'E'].exp;
+            if (e) {
+                if (next[1] == 'i') {
+                    d*= si_prefixes[*next - 'E'].bin_val;
+                    next+=2;
+                } else {
+                    d*= si_prefixes[*next - 'E'].dec_val;
+                    next++;
+                }
+            }
+        }
+
+        if (*next=='B') {
+            d*=8;
+            next++;
+        }
+    }
+    /* if requested, fill in tail with the position after the last parsed
+       character */
+    if (tail)
+        *tail = next;
+    return d;
+}
+
+#define IS_IDENTIFIER_CHAR(c) ((c) - '0' <= 9U || (c) - 'a' <= 25U || (c) - 'A' <= 25U || (c) == '_')
+
+static int strmatch(const char *s, const char *prefix)
+{
+    int i;
+    for (i=0; prefix[i]; i++) {
+        if (prefix[i] != s[i]) return 0;
+    }
+    /* return 1 only if the s identifier is terminated */
+    return !IS_IDENTIFIER_CHAR(s[i]);
+}
+
+struct AVExpr {
+    enum {
+        e_value, e_const, e_func0, e_func1, e_func2,
+        e_squish, e_gauss, e_ld, e_isnan, e_isinf,
+        e_mod, e_max, e_min, e_eq, e_gt, e_gte, e_lte, e_lt,
+        e_pow, e_mul, e_div, e_add,
+        e_last, e_st, e_while, e_taylor, e_root, e_floor, e_ceil, e_trunc, e_round,
+        e_sqrt, e_not, e_random, e_hypot, e_gcd,
+        e_if, e_ifnot, e_print, e_bitand, e_bitor, e_between, e_clip, e_atan2, e_lerp,
+        e_sgn, e_randomi
+    } type;
+    double value; // is sign in other types
+    int const_index;
+    union {
+        double (*func0)(double);
+        double (*func1)(void *, double);
+        double (*func2)(void *, double, double);
+    } a;
+    struct AVExpr *param[3];
+    double *var;
+    FFSFC64 *prng_state;
+};
+
+static double etime(double v)
+{
+    return av_gettime() * 0.000001;
+}
+
+static double eval_expr(Parser *p, AVExpr *e)
+{
+    switch (e->type) {
+        case e_value:  return e->value;
+        case e_const:  return e->value * p->const_values[e->const_index];
+        case e_func0:  return e->value * e->a.func0(eval_expr(p, e->param[0]));
+        case e_func1:  return e->value * e->a.func1(p->opaque, eval_expr(p, e->param[0]));
+        case e_func2:  return e->value * e->a.func2(p->opaque, eval_expr(p, e->param[0]), eval_expr(p, e->param[1]));
+        case e_squish: return 1/(1+exp(4*eval_expr(p, e->param[0])));
+        case e_gauss: { double d = eval_expr(p, e->param[0]); return exp(-d*d/2)/sqrt(2*M_PI); }
+        case e_ld:     return e->value * p->var[av_clip(eval_expr(p, e->param[0]), 0, VARS-1)];
+        case e_isnan:  return e->value * !!isnan(eval_expr(p, e->param[0]));
+        case e_isinf:  return e->value * !!isinf(eval_expr(p, e->param[0]));
+        case e_floor:  return e->value * floor(eval_expr(p, e->param[0]));
+        case e_ceil :  return e->value * ceil (eval_expr(p, e->param[0]));
+        case e_trunc:  return e->value * trunc(eval_expr(p, e->param[0]));
+        case e_round:  return e->value * round(eval_expr(p, e->param[0]));
+        case e_sgn:    return e->value * FFDIFFSIGN(eval_expr(p, e->param[0]), 0);
+        case e_sqrt:   return e->value * sqrt (eval_expr(p, e->param[0]));
+        case e_not:    return e->value * (eval_expr(p, e->param[0]) == 0);
+        case e_if:     return e->value * (eval_expr(p, e->param[0]) ? eval_expr(p, e->param[1]) :
+                                          e->param[2] ? eval_expr(p, e->param[2]) : 0);
+        case e_ifnot:  return e->value * (!eval_expr(p, e->param[0]) ? eval_expr(p, e->param[1]) :
+                                          e->param[2] ? eval_expr(p, e->param[2]) : 0);
+        case e_clip: {
+            double x = eval_expr(p, e->param[0]);
+            double min = eval_expr(p, e->param[1]), max = eval_expr(p, e->param[2]);
+            if (isnan(min) || isnan(max) || isnan(x) || min > max)
+                return NAN;
+            return e->value * av_clipd(eval_expr(p, e->param[0]), min, max);
+        }
+        case e_between: {
+            double d = eval_expr(p, e->param[0]);
+            return e->value * (d >= eval_expr(p, e->param[1]) &&
+                               d <= eval_expr(p, e->param[2]));
+        }
+        case e_lerp: {
+            double v0 = eval_expr(p, e->param[0]);
+            double v1 = eval_expr(p, e->param[1]);
+            double f  = eval_expr(p, e->param[2]);
+            return v0 + (v1 - v0) * f;
+        }
+        case e_print: {
+            double x = eval_expr(p, e->param[0]);
+            int level = e->param[1] ? av_clip(eval_expr(p, e->param[1]), INT_MIN, INT_MAX) : AV_LOG_INFO;
+            av_log(p, level, "%f\n", x);
+            return x;
+        }
+
+#define COMPUTE_NEXT_RANDOM()                                        \
+            int idx = av_clip(eval_expr(p, e->param[0]), 0, VARS-1); \
+            FFSFC64 *s = p->prng_state + idx;                        \
+            uint64_t r;                                              \
+                                                                     \
+            if (!s->counter) {                                       \
+                r = isnan(p->var[idx]) ? 0 : p->var[idx];            \
+                ff_sfc64_init(s, r, r, r, 12);                       \
+            }                                                        \
+            r = ff_sfc64_get(s);                                     \
+            p->var[idx] = r;                                         \
+
+        case e_random: {
+            COMPUTE_NEXT_RANDOM();
+            return r * (1.0/UINT64_MAX);
+        }
+        case e_randomi: {
+            double min = eval_expr(p, e->param[1]);
+            double max = eval_expr(p, e->param[2]);
+            COMPUTE_NEXT_RANDOM();
+            return min + (max - min) * r / UINT64_MAX;
+        }
+        case e_while: {
+            double d = NAN;
+            while (eval_expr(p, e->param[0]))
+                d=eval_expr(p, e->param[1]);
+            return d;
+        }
+        case e_taylor: {
+            double t = 1, d = 0, v;
+            double x = eval_expr(p, e->param[1]);
+            int id = e->param[2] ? av_clip(eval_expr(p, e->param[2]), 0, VARS-1) : 0;
+            int i;
+            double var0 = p->var[id];
+            for(i=0; i<1000; i++) {
+                double ld = d;
+                p->var[id] = i;
+                v = eval_expr(p, e->param[0]);
+                d += t*v;
+                if(ld==d && v)
+                    break;
+                t *= x / (i+1);
+            }
+            p->var[id] = var0;
+            return d;
+        }
+        case e_root: {
+            int i, j;
+            double low = -1, high = -1, v, low_v = -DBL_MAX, high_v = DBL_MAX;
+            double var0 = p->var[0];
+            double x_max = eval_expr(p, e->param[1]);
+            for(i=-1; i<1024; i++) {
+                if(i<255) {
+                    p->var[0] = ff_reverse[i&255]*x_max/255;
+                } else {
+                    p->var[0] = x_max*pow(0.9, i-255);
+                    if (i&1) p->var[0] *= -1;
+                    if (i&2) p->var[0] += low;
+                    else     p->var[0] += high;
+                }
+                v = eval_expr(p, e->param[0]);
+                if (v<=0 && v>low_v) {
+                    low    = p->var[0];
+                    low_v  = v;
+                }
+                if (v>=0 && v<high_v) {
+                    high   = p->var[0];
+                    high_v = v;
+                }
+                if (low>=0 && high>=0){
+                    for (j=0; j<1000; j++) {
+                        p->var[0] = (low+high)*0.5;
+                        if (low == p->var[0] || high == p->var[0])
+                            break;
+                        v = eval_expr(p, e->param[0]);
+                        if (v<=0) low = p->var[0];
+                        if (v>=0) high= p->var[0];
+                        if (isnan(v)) {
+                            low = high = v;
+                            break;
+                        }
+                    }
+                    break;
+                }
+            }
+            p->var[0] = var0;
+            return -low_v<high_v ? low : high;
+        }
+        default: {
+            double d = eval_expr(p, e->param[0]);
+            double d2 = eval_expr(p, e->param[1]);
+            switch (e->type) {
+                case e_mod: return e->value * (d - floor(d2 ? d / d2 : d * INFINITY) * d2);
+                case e_gcd: return e->value * av_gcd(d,d2);
+                case e_max: return e->value * (d >  d2 ?   d : d2);
+                case e_min: return e->value * (d <  d2 ?   d : d2);
+                case e_eq:  return e->value * (d == d2 ? 1.0 : 0.0);
+                case e_gt:  return e->value * (d >  d2 ? 1.0 : 0.0);
+                case e_gte: return e->value * (d >= d2 ? 1.0 : 0.0);
+                case e_lt:  return e->value * (d <  d2 ? 1.0 : 0.0);
+                case e_lte: return e->value * (d <= d2 ? 1.0 : 0.0);
+                case e_pow: return e->value * pow(d, d2);
+                case e_mul: return e->value * (d * d2);
+                case e_div: return e->value * (d2 ? (d / d2) : d * INFINITY);
+                case e_add: return e->value * (d + d2);
+                case e_last:return e->value * d2;
+                case e_st :  {
+                    int index = av_clip(d, 0, VARS-1);
+                    p->prng_state[index].counter = 0;
+                    return e->value * (p->var[index]= d2);
+                }
+                case e_hypot:return e->value * hypot(d, d2);
+                case e_atan2:return e->value * atan2(d, d2);
+                case e_bitand: return isnan(d) || isnan(d2) ? NAN : e->value * ((long int)d & (long int)d2);
+                case e_bitor:  return isnan(d) || isnan(d2) ? NAN : e->value * ((long int)d | (long int)d2);
+            }
+        }
+    }
+    return NAN;
+}
+
+static int parse_expr(AVExpr **e, Parser *p);
+
+void av_expr_free(AVExpr *e)
+{
+    if (!e) return;
+    av_expr_free(e->param[0]);
+    av_expr_free(e->param[1]);
+    av_expr_free(e->param[2]);
+    av_freep(&e->var);
+    av_freep(&e->prng_state);
+    av_freep(&e);
+}
+
+static int parse_primary(AVExpr **e, Parser *p)
+{
+    AVExpr *d = av_mallocz(sizeof(AVExpr));
+    char *next = p->s, *s0 = p->s;
+    int ret, i;
+
+    if (!d)
+        return AVERROR(ENOMEM);
+
+    /* number */
+    d->value = av_strtod(p->s, &next);
+    if (next != p->s) {
+        d->type = e_value;
+        p->s= next;
+        *e = d;
+        return 0;
+    }
+    d->value = 1;
+
+    /* named constants */
+    for (i=0; p->const_names && p->const_names[i]; i++) {
+        if (strmatch(p->s, p->const_names[i])) {
+            p->s+= strlen(p->const_names[i]);
+            d->type = e_const;
+            d->const_index = i;
+            *e = d;
+            return 0;
+        }
+    }
+    for (i = 0; i < FF_ARRAY_ELEMS(constants); i++) {
+        if (strmatch(p->s, constants[i].name)) {
+            p->s += strlen(constants[i].name);
+            d->type = e_value;
+            d->value = constants[i].value;
+            *e = d;
+            return 0;
+        }
+    }
+
+    p->s= strchr(p->s, '(');
+    if (!p->s) {
+        av_log(p, AV_LOG_ERROR, "Undefined constant or missing '(' in '%s'\n", s0);
+        p->s= next;
+        av_expr_free(d);
+        return AVERROR(EINVAL);
+    }
+    p->s++; // "("
+    if (*next == '(') { // special case do-nothing
+        av_freep(&d);
+        if ((ret = parse_expr(&d, p)) < 0)
+            return ret;
+        if (p->s[0] != ')') {
+            av_log(p, AV_LOG_ERROR, "Missing ')' in '%s'\n", s0);
+            av_expr_free(d);
+            return AVERROR(EINVAL);
+        }
+        p->s++; // ")"
+        *e = d;
+        return 0;
+    }
+    if ((ret = parse_expr(&(d->param[0]), p)) < 0) {
+        av_expr_free(d);
+        return ret;
+    }
+    if (p->s[0]== ',') {
+        p->s++; // ","
+        parse_expr(&d->param[1], p);
+    }
+    if (p->s[0]== ',') {
+        p->s++; // ","
+        parse_expr(&d->param[2], p);
+    }
+    if (p->s[0] != ')') {
+        av_log(p, AV_LOG_ERROR, "Missing ')' or too many args in '%s'\n", s0);
+        av_expr_free(d);
+        return AVERROR(EINVAL);
+    }
+    p->s++; // ")"
+
+    d->type = e_func0;
+         if (strmatch(next, "sinh"  )) d->a.func0 = sinh;
+    else if (strmatch(next, "cosh"  )) d->a.func0 = cosh;
+    else if (strmatch(next, "tanh"  )) d->a.func0 = tanh;
+    else if (strmatch(next, "sin"   )) d->a.func0 = sin;
+    else if (strmatch(next, "cos"   )) d->a.func0 = cos;
+    else if (strmatch(next, "tan"   )) d->a.func0 = tan;
+    else if (strmatch(next, "atan"  )) d->a.func0 = atan;
+    else if (strmatch(next, "asin"  )) d->a.func0 = asin;
+    else if (strmatch(next, "acos"  )) d->a.func0 = acos;
+    else if (strmatch(next, "exp"   )) d->a.func0 = exp;
+    else if (strmatch(next, "log"   )) d->a.func0 = log;
+    else if (strmatch(next, "abs"   )) d->a.func0 = fabs;
+    else if (strmatch(next, "time"  )) d->a.func0 = etime;
+    else if (strmatch(next, "squish")) d->type = e_squish;
+    else if (strmatch(next, "gauss" )) d->type = e_gauss;
+    else if (strmatch(next, "mod"   )) d->type = e_mod;
+    else if (strmatch(next, "max"   )) d->type = e_max;
+    else if (strmatch(next, "min"   )) d->type = e_min;
+    else if (strmatch(next, "eq"    )) d->type = e_eq;
+    else if (strmatch(next, "gte"   )) d->type = e_gte;
+    else if (strmatch(next, "gt"    )) d->type = e_gt;
+    else if (strmatch(next, "lte"   )) d->type = e_lte;
+    else if (strmatch(next, "lt"    )) d->type = e_lt;
+    else if (strmatch(next, "ld"    )) d->type = e_ld;
+    else if (strmatch(next, "isnan" )) d->type = e_isnan;
+    else if (strmatch(next, "isinf" )) d->type = e_isinf;
+    else if (strmatch(next, "st"    )) d->type = e_st;
+    else if (strmatch(next, "while" )) d->type = e_while;
+    else if (strmatch(next, "taylor")) d->type = e_taylor;
+    else if (strmatch(next, "root"  )) d->type = e_root;
+    else if (strmatch(next, "floor" )) d->type = e_floor;
+    else if (strmatch(next, "ceil"  )) d->type = e_ceil;
+    else if (strmatch(next, "trunc" )) d->type = e_trunc;
+    else if (strmatch(next, "round" )) d->type = e_round;
+    else if (strmatch(next, "sqrt"  )) d->type = e_sqrt;
+    else if (strmatch(next, "not"   )) d->type = e_not;
+    else if (strmatch(next, "pow"   )) d->type = e_pow;
+    else if (strmatch(next, "print" )) d->type = e_print;
+    else if (strmatch(next, "random")) d->type = e_random;
+    else if (strmatch(next, "randomi")) d->type = e_randomi;
+    else if (strmatch(next, "hypot" )) d->type = e_hypot;
+    else if (strmatch(next, "gcd"   )) d->type = e_gcd;
+    else if (strmatch(next, "if"    )) d->type = e_if;
+    else if (strmatch(next, "ifnot" )) d->type = e_ifnot;
+    else if (strmatch(next, "bitand")) d->type = e_bitand;
+    else if (strmatch(next, "bitor" )) d->type = e_bitor;
+    else if (strmatch(next, "between"))d->type = e_between;
+    else if (strmatch(next, "clip"  )) d->type = e_clip;
+    else if (strmatch(next, "atan2" )) d->type = e_atan2;
+    else if (strmatch(next, "lerp"  )) d->type = e_lerp;
+    else if (strmatch(next, "sgn"   )) d->type = e_sgn;
+    else {
+        for (i=0; p->func1_names && p->func1_names[i]; i++) {
+            if (strmatch(next, p->func1_names[i])) {
+                d->a.func1 = p->funcs1[i];
+                d->type = e_func1;
+                d->const_index = i;
+                *e = d;
+                return 0;
+            }
+        }
+
+        for (i=0; p->func2_names && p->func2_names[i]; i++) {
+            if (strmatch(next, p->func2_names[i])) {
+                d->a.func2 = p->funcs2[i];
+                d->type = e_func2;
+                d->const_index = i;
+                *e = d;
+                return 0;
+            }
+        }
+
+        av_log(p, AV_LOG_ERROR, "Unknown function in '%s'\n", s0);
+        av_expr_free(d);
+        return AVERROR(EINVAL);
+    }
+
+    *e = d;
+    return 0;
+}
+
+static AVExpr *make_eval_expr(int type, int value, AVExpr *p0, AVExpr *p1)
+{
+    AVExpr *e = av_mallocz(sizeof(AVExpr));
+    if (!e)
+        return NULL;
+    e->type     =type   ;
+    e->value    =value  ;
+    e->param[0] =p0     ;
+    e->param[1] =p1     ;
+    return e;
+}
+
+static int parse_pow(AVExpr **e, Parser *p, int *sign)
+{
+    *sign= (*p->s == '+') - (*p->s == '-');
+    p->s += *sign&1;
+    return parse_primary(e, p);
+}
+
+static int parse_dB(AVExpr **e, Parser *p, int *sign)
+{
+    /* do not filter out the negative sign when parsing a dB value.
+       for example, -3dB is not the same as -(3dB) */
+    if (*p->s == '-') {
+        char *next;
+        double av_unused ignored = strtod(p->s, &next);
+        if (next != p->s && next[0] == 'd' && next[1] == 'B') {
+            *sign = 0;
+            return parse_primary(e, p);
+        }
+    }
+    return parse_pow(e, p, sign);
+}
+
+static int parse_factor(AVExpr **e, Parser *p)
+{
+    int sign, sign2, ret;
+    AVExpr *e0, *e1, *e2;
+    if ((ret = parse_dB(&e0, p, &sign)) < 0)
+        return ret;
+    while(p->s[0]=='^'){
+        e1 = e0;
+        p->s++;
+        if ((ret = parse_dB(&e2, p, &sign2)) < 0) {
+            av_expr_free(e1);
+            return ret;
+        }
+        e0 = make_eval_expr(e_pow, 1, e1, e2);
+        if (!e0) {
+            av_expr_free(e1);
+            av_expr_free(e2);
+            return AVERROR(ENOMEM);
+        }
+        if (e0->param[1]) e0->param[1]->value *= (sign2|1);
+    }
+    if (e0) e0->value *= (sign|1);
+
+    *e = e0;
+    return 0;
+}
+
+static int parse_term(AVExpr **e, Parser *p)
+{
+    int ret;
+    AVExpr *e0, *e1, *e2;
+    if ((ret = parse_factor(&e0, p)) < 0)
+        return ret;
+    while (p->s[0]=='*' || p->s[0]=='/') {
+        int c= *p->s++;
+        e1 = e0;
+        if ((ret = parse_factor(&e2, p)) < 0) {
+            av_expr_free(e1);
+            return ret;
+        }
+        e0 = make_eval_expr(c == '*' ? e_mul : e_div, 1, e1, e2);
+        if (!e0) {
+            av_expr_free(e1);
+            av_expr_free(e2);
+            return AVERROR(ENOMEM);
+        }
+    }
+    *e = e0;
+    return 0;
+}
+
+static int parse_subexpr(AVExpr **e, Parser *p)
+{
+    int ret;
+    AVExpr *e0, *e1, *e2;
+    if ((ret = parse_term(&e0, p)) < 0)
+        return ret;
+    while (*p->s == '+' || *p->s == '-') {
+        e1 = e0;
+        if ((ret = parse_term(&e2, p)) < 0) {
+            av_expr_free(e1);
+            return ret;
+        }
+        e0 = make_eval_expr(e_add, 1, e1, e2);
+        if (!e0) {
+            av_expr_free(e1);
+            av_expr_free(e2);
+            return AVERROR(ENOMEM);
+        }
+    };
+
+    *e = e0;
+    return 0;
+}
+
+static int parse_expr(AVExpr **e, Parser *p)
+{
+    int ret;
+    AVExpr *e0, *e1, *e2;
+    if (p->stack_index <= 0) //protect against stack overflows
+        return AVERROR(EINVAL);
+    p->stack_index--;
+
+    if ((ret = parse_subexpr(&e0, p)) < 0)
+        return ret;
+    while (*p->s == ';') {
+        p->s++;
+        e1 = e0;
+        if ((ret = parse_subexpr(&e2, p)) < 0) {
+            av_expr_free(e1);
+            return ret;
+        }
+        e0 = make_eval_expr(e_last, 1, e1, e2);
+        if (!e0) {
+            av_expr_free(e1);
+            av_expr_free(e2);
+            return AVERROR(ENOMEM);
+        }
+    };
+
+    p->stack_index++;
+    *e = e0;
+    return 0;
+}
+
+static int verify_expr(AVExpr *e)
+{
+    if (!e) return 0;
+    switch (e->type) {
+        case e_value:
+        case e_const: return 1;
+        case e_func0:
+        case e_func1:
+        case e_squish:
+        case e_ld:
+        case e_gauss:
+        case e_isnan:
+        case e_isinf:
+        case e_floor:
+        case e_ceil:
+        case e_trunc:
+        case e_round:
+        case e_sqrt:
+        case e_not:
+        case e_random:
+        case e_sgn:
+            return verify_expr(e->param[0]) && !e->param[1];
+        case e_print:
+            return verify_expr(e->param[0])
+                   && (!e->param[1] || verify_expr(e->param[1]));
+        case e_if:
+        case e_ifnot:
+        case e_taylor:
+            return verify_expr(e->param[0]) && verify_expr(e->param[1])
+                   && (!e->param[2] || verify_expr(e->param[2]));
+        case e_between:
+        case e_clip:
+        case e_lerp:
+        case e_randomi:
+            return verify_expr(e->param[0]) &&
+                   verify_expr(e->param[1]) &&
+                   verify_expr(e->param[2]);
+        default: return verify_expr(e->param[0]) && verify_expr(e->param[1]) && !e->param[2];
+    }
+}
+
+int av_expr_parse(AVExpr **expr, const char *s,
+                  const char * const *const_names,
+                  const char * const *func1_names, double (* const *funcs1)(void *, double),
+                  const char * const *func2_names, double (* const *funcs2)(void *, double, double),
+                  int log_offset, void *log_ctx)
+{
+    Parser p = { 0 };
+    AVExpr *e = NULL;
+    char *w = av_malloc(strlen(s) + 1);
+    char *wp = w;
+    const char *s0 = s;
+    int ret = 0;
+
+    if (!w)
+        return AVERROR(ENOMEM);
+
+    while (*s)
+        if (!av_isspace(*s++)) *wp++ = s[-1];
+    *wp++ = 0;
+
+    p.class      = &eval_class;
+    p.stack_index=100;
+    p.s= w;
+    p.const_names = const_names;
+    p.funcs1      = funcs1;
+    p.func1_names = func1_names;
+    p.funcs2      = funcs2;
+    p.func2_names = func2_names;
+    p.log_offset = log_offset;
+    p.log_ctx    = log_ctx;
+
+    if ((ret = parse_expr(&e, &p)) < 0)
+        goto end;
+    if (*p.s) {
+        av_log(&p, AV_LOG_ERROR, "Invalid chars '%s' at the end of expression '%s'\n", p.s, s0);
+        ret = AVERROR(EINVAL);
+        goto end;
+    }
+    if (!verify_expr(e)) {
+        ret = AVERROR(EINVAL);
+        goto end;
+    }
+    e->var= av_mallocz(sizeof(double) *VARS);
+    e->prng_state = av_mallocz(sizeof(*e->prng_state) *VARS);
+    if (!e->var || !e->prng_state) {
+        ret = AVERROR(ENOMEM);
+        goto end;
+    }
+    *expr = e;
+    e = NULL;
+end:
+    av_expr_free(e);
+    av_free(w);
+    return ret;
+}
+
+static int expr_count(AVExpr *e, unsigned *counter, int size, int type)
+{
+    int i;
+
+    if (!e || !counter || !size)
+        return AVERROR(EINVAL);
+
+    for (i = 0; e->type != type && i < 3 && e->param[i]; i++)
+        expr_count(e->param[i], counter, size, type);
+
+    if (e->type == type && e->const_index < size)
+        counter[e->const_index]++;
+
+    return 0;
+}
+
+int av_expr_count_vars(AVExpr *e, unsigned *counter, int size)
+{
+    return expr_count(e, counter, size, e_const);
+}
+
+int av_expr_count_func(AVExpr *e, unsigned *counter, int size, int arg)
+{
+    return expr_count(e, counter, size, ((int[]){e_const, e_func1, e_func2})[arg]);
+}
+
+double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
+{
+    Parser p = {
+        .class        = &eval_class,
+        .const_values = const_values,
+        .opaque       = opaque,
+        .var          = e->var,
+        .prng_state   = e->prng_state,
+    };
+
+    return eval_expr(&p, e);
+}
+
+int av_expr_parse_and_eval(double *d, const char *s,
+                           const char * const *const_names, const double *const_values,
+                           const char * const *func1_names, double (* const *funcs1)(void *, double),
+                           const char * const *func2_names, double (* const *funcs2)(void *, double, double),
+                           void *opaque, int log_offset, void *log_ctx)
+{
+    AVExpr *e = NULL;
+    int ret = av_expr_parse(&e, s, const_names, func1_names, funcs1, func2_names, funcs2, log_offset, log_ctx);
+
+    if (ret < 0) {
+        *d = NAN;
+        return ret;
+    }
+    *d = av_expr_eval(e, const_values, opaque);
+    av_expr_free(e);
+    return isnan(*d) ? AVERROR(EINVAL) : 0;
+}

ffmpeg/libavutil/eval.h

@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * simple arithmetic expression evaluator
+ */
+
+#ifndef AVUTIL_EVAL_H
+#define AVUTIL_EVAL_H
+
+typedef struct AVExpr AVExpr;
+
+/**
+ * Parse and evaluate an expression.
+ * Note, this is significantly slower than av_expr_eval().
+ *
+ * @param res a pointer to a double where is put the result value of
+ * the expression, or NAN in case of error
+ * @param s expression as a zero terminated string, for example "1+2^3+5*5+sin(2/3)"
+ * @param const_names NULL terminated array of zero terminated strings of constant identifiers, for example {"PI", "E", 0}
+ * @param const_values a zero terminated array of values for the identifiers from const_names
+ * @param func1_names NULL terminated array of zero terminated strings of funcs1 identifiers
+ * @param funcs1 NULL terminated array of function pointers for functions which take 1 argument
+ * @param func2_names NULL terminated array of zero terminated strings of funcs2 identifiers
+ * @param funcs2 NULL terminated array of function pointers for functions which take 2 arguments
+ * @param opaque a pointer which will be passed to all functions from funcs1 and funcs2
+ * @param log_offset log level offset, can be used to silence error messages
+ * @param log_ctx parent logging context
+ * @return >= 0 in case of success, a negative value corresponding to an
+ * AVERROR code otherwise
+ */
+int av_expr_parse_and_eval(double *res, const char *s,
+                           const char * const *const_names, const double *const_values,
+                           const char * const *func1_names, double (* const *funcs1)(void *, double),
+                           const char * const *func2_names, double (* const *funcs2)(void *, double, double),
+                           void *opaque, int log_offset, void *log_ctx);
+
+/**
+ * Parse an expression.
+ *
+ * @param expr a pointer where is put an AVExpr containing the parsed
+ * value in case of successful parsing, or NULL otherwise.
+ * The pointed to AVExpr must be freed with av_expr_free() by the user
+ * when it is not needed anymore.
+ * @param s expression as a zero terminated string, for example "1+2^3+5*5+sin(2/3)"
+ * @param const_names NULL terminated array of zero terminated strings of constant identifiers, for example {"PI", "E", 0}
+ * @param func1_names NULL terminated array of zero terminated strings of funcs1 identifiers
+ * @param funcs1 NULL terminated array of function pointers for functions which take 1 argument
+ * @param func2_names NULL terminated array of zero terminated strings of funcs2 identifiers
+ * @param funcs2 NULL terminated array of function pointers for functions which take 2 arguments
+ * @param log_offset log level offset, can be used to silence error messages
+ * @param log_ctx parent logging context
+ * @return >= 0 in case of success, a negative value corresponding to an
+ * AVERROR code otherwise
+ */
+int av_expr_parse(AVExpr **expr, const char *s,
+                  const char * const *const_names,
+                  const char * const *func1_names, double (* const *funcs1)(void *, double),
+                  const char * const *func2_names, double (* const *funcs2)(void *, double, double),
+                  int log_offset, void *log_ctx);
+
+/**
+ * Evaluate a previously parsed expression.
+ *
+ * @param e the AVExpr to evaluate
+ * @param const_values a zero terminated array of values for the identifiers from av_expr_parse() const_names
+ * @param opaque a pointer which will be passed to all functions from funcs1 and funcs2
+ * @return the value of the expression
+ */
+double av_expr_eval(AVExpr *e, const double *const_values, void *opaque);
+
+/**
+ * Track the presence of variables and their number of occurrences in a parsed expression
+ *
+ * @param e the AVExpr to track variables in
+ * @param counter a zero-initialized array where the count of each variable will be stored
+ * @param size size of array
+ * @return 0 on success, a negative value indicates that no expression or array was passed
+ * or size was zero
+ */
+int av_expr_count_vars(AVExpr *e, unsigned *counter, int size);
+
+/**
+ * Track the presence of user provided functions and their number of occurrences
+ * in a parsed expression.
+ *
+ * @param e the AVExpr to track user provided functions in
+ * @param counter a zero-initialized array where the count of each function will be stored
+ *                if you passed 5 functions with 2 arguments to av_expr_parse()
+ *                then for arg=2 this will use up to 5 entries.
+ * @param size size of array
+ * @param arg number of arguments the counted functions have
+ * @return 0 on success, a negative value indicates that no expression or array was passed
+ * or size was zero
+ */
+int av_expr_count_func(AVExpr *e, unsigned *counter, int size, int arg);
+
+/**
+ * Free a parsed expression previously created with av_expr_parse().
+ */
+void av_expr_free(AVExpr *e);
+
+/**
+ * Parse the string in numstr and return its value as a double. If
+ * the string is empty, contains only whitespaces, or does not contain
+ * an initial substring that has the expected syntax for a
+ * floating-point number, no conversion is performed. In this case,
+ * returns a value of zero and the value returned in tail is the value
+ * of numstr.
+ *
+ * @param numstr a string representing a number, may contain one of
+ * the International System number postfixes, for example 'K', 'M',
+ * 'G'. If 'i' is appended after the postfix, powers of 2 are used
+ * instead of powers of 10. The 'B' postfix multiplies the value by
+ * 8, and can be appended after another postfix or used alone. This
+ * allows using for example 'KB', 'MiB', 'G' and 'B' as postfix.
+ * @param tail if non-NULL puts here the pointer to the char next
+ * after the last parsed character
+ */
+double av_strtod(const char *numstr, char **tail);
+
+#endif /* AVUTIL_EVAL_H */

ffmpeg/libavutil/executor.c

@@ -0,0 +1,221 @@
+/*
+ * Copyright (C) 2023 Nuo Mi
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include <stdbool.h>
+
+#include "mem.h"
+#include "thread.h"
+
+#include "executor.h"
+
+#if !HAVE_THREADS
+
+#define ExecutorThread  char
+
+#define executor_thread_create(t, a, s, ar)      0
+#define executor_thread_join(t, r)               do {} while(0)
+
+#else
+
+#define ExecutorThread  pthread_t
+
+#define executor_thread_create(t, a, s, ar)      pthread_create(t, a, s, ar)
+#define executor_thread_join(t, r)               pthread_join(t, r)
+
+#endif //!HAVE_THREADS
+
+typedef struct ThreadInfo {
+    AVExecutor *e;
+    ExecutorThread thread;
+} ThreadInfo;
+
+struct AVExecutor {
+    AVTaskCallbacks cb;
+    int thread_count;
+    bool recursive;
+
+    ThreadInfo *threads;
+    uint8_t *local_contexts;
+
+    AVMutex lock;
+    AVCond cond;
+    int die;
+
+    AVTask *tasks;
+};
+
+static AVTask* remove_task(AVTask **prev, AVTask *t)
+{
+    *prev  = t->next;
+    t->next = NULL;
+    return t;
+}
+
+static void add_task(AVTask **prev, AVTask *t)
+{
+    t->next = *prev;
+    *prev   = t;
+}
+
+static int run_one_task(AVExecutor *e, void *lc)
+{
+    AVTaskCallbacks *cb = &e->cb;
+    AVTask **prev;
+
+    for (prev = &e->tasks; *prev && !cb->ready(*prev, cb->user_data); prev = &(*prev)->next)
+        /* nothing */;
+    if (*prev) {
+        AVTask *t = remove_task(prev, *prev);
+        if (e->thread_count > 0)
+            ff_mutex_unlock(&e->lock);
+        cb->run(t, lc, cb->user_data);
+        if (e->thread_count > 0)
+            ff_mutex_lock(&e->lock);
+        return 1;
+    }
+    return 0;
+}
+
+#if HAVE_THREADS
+static void *executor_worker_task(void *data)
+{
+    ThreadInfo *ti = (ThreadInfo*)data;
+    AVExecutor *e  = ti->e;
+    void *lc       = e->local_contexts + (ti - e->threads) * e->cb.local_context_size;
+
+    ff_mutex_lock(&e->lock);
+    while (1) {
+        if (e->die) break;
+
+        if (!run_one_task(e, lc)) {
+            //no task in one loop
+            ff_cond_wait(&e->cond, &e->lock);
+        }
+    }
+    ff_mutex_unlock(&e->lock);
+    return NULL;
+}
+#endif
+
+static void executor_free(AVExecutor *e, const int has_lock, const int has_cond)
+{
+    if (e->thread_count) {
+        //signal die
+        ff_mutex_lock(&e->lock);
+        e->die = 1;
+        ff_cond_broadcast(&e->cond);
+        ff_mutex_unlock(&e->lock);
+
+        for (int i = 0; i < e->thread_count; i++)
+            executor_thread_join(e->threads[i].thread, NULL);
+    }
+    if (has_cond)
+        ff_cond_destroy(&e->cond);
+    if (has_lock)
+        ff_mutex_destroy(&e->lock);
+
+    av_free(e->threads);
+    av_free(e->local_contexts);
+
+    av_free(e);
+}
+
+AVExecutor* av_executor_alloc(const AVTaskCallbacks *cb, int thread_count)
+{
+    AVExecutor *e;
+    int has_lock = 0, has_cond = 0;
+    if (!cb || !cb->user_data || !cb->ready || !cb->run || !cb->priority_higher)
+        return NULL;
+
+    e = av_mallocz(sizeof(*e));
+    if (!e)
+        return NULL;
+    e->cb = *cb;
+
+    e->local_contexts = av_calloc(FFMAX(thread_count, 1), e->cb.local_context_size);
+    if (!e->local_contexts)
+        goto free_executor;
+
+    e->threads = av_calloc(FFMAX(thread_count, 1), sizeof(*e->threads));
+    if (!e->threads)
+        goto free_executor;
+
+    if (!thread_count)
+        return e;
+
+    has_lock = !ff_mutex_init(&e->lock, NULL);
+    has_cond = !ff_cond_init(&e->cond, NULL);
+
+    if (!has_lock || !has_cond)
+        goto free_executor;
+
+    for (/* nothing */; e->thread_count < thread_count; e->thread_count++) {
+        ThreadInfo *ti = e->threads + e->thread_count;
+        ti->e = e;
+        if (executor_thread_create(&ti->thread, NULL, executor_worker_task, ti))
+            goto free_executor;
+    }
+    return e;
+
+free_executor:
+    executor_free(e, has_lock, has_cond);
+    return NULL;
+}
+
+void av_executor_free(AVExecutor **executor)
+{
+    int thread_count;
+
+    if (!executor || !*executor)
+        return;
+    thread_count = (*executor)->thread_count;
+    executor_free(*executor, thread_count, thread_count);
+    *executor = NULL;
+}
+
+void av_executor_execute(AVExecutor *e, AVTask *t)
+{
+    AVTaskCallbacks *cb = &e->cb;
+    AVTask **prev;
+
+    if (e->thread_count)
+        ff_mutex_lock(&e->lock);
+    if (t) {
+        for (prev = &e->tasks; *prev && cb->priority_higher(*prev, t); prev = &(*prev)->next)
+            /* nothing */;
+        add_task(prev, t);
+    }
+    if (e->thread_count) {
+        ff_cond_signal(&e->cond);
+        ff_mutex_unlock(&e->lock);
+    }
+
+    if (!e->thread_count || !HAVE_THREADS) {
+        if (e->recursive)
+            return;
+        e->recursive = true;
+        // We are running in a single-threaded environment, so we must handle all tasks ourselves
+        while (run_one_task(e, e->local_contexts))
+            /* nothing */;
+        e->recursive = false;
+    }
+}

ffmpeg/libavutil/executor.h

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2023 Nuo Mi
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_EXECUTOR_H
+#define AVUTIL_EXECUTOR_H
+
+typedef struct AVExecutor AVExecutor;
+typedef struct AVTask AVTask;
+
+struct AVTask {
+    AVTask *next;
+};
+
+typedef struct AVTaskCallbacks {
+    void *user_data;
+
+    int local_context_size;
+
+    // return 1 if a's priority > b's priority
+    int (*priority_higher)(const AVTask *a, const AVTask *b);
+
+    // task is ready for run
+    int (*ready)(const AVTask *t, void *user_data);
+
+    // run the task
+    int (*run)(AVTask *t, void *local_context, void *user_data);
+} AVTaskCallbacks;
+
+/**
+ * Alloc executor
+ * @param callbacks callback structure for executor
+ * @param thread_count worker thread number, 0 for run on caller's thread directly
+ * @return return the executor
+ */
+AVExecutor* av_executor_alloc(const AVTaskCallbacks *callbacks, int thread_count);
+
+/**
+ * Free executor
+ * @param e  pointer to executor
+ */
+void av_executor_free(AVExecutor **e);
+
+/**
+ * Add task to executor
+ * @param e pointer to executor
+ * @param t pointer to task. If NULL, it will wakeup one work thread
+ */
+void av_executor_execute(AVExecutor *e, AVTask *t);
+
+#endif //AVUTIL_EXECUTOR_H

ffmpeg/libavutil/ffmath.h

@@ -0,0 +1,67 @@
+/*
+ * copyright (c) 2016 Ganesh Ajjanagadde <gajjanag@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * internal math functions header
+ */
+
+#ifndef AVUTIL_FFMATH_H
+#define AVUTIL_FFMATH_H
+
+#include "attributes.h"
+#include "libm.h"
+
+/**
+ * Compute 10^x for floating point values. Note: this function is by no means
+ * "correctly rounded", and is meant as a fast, reasonably accurate approximation.
+ * For instance, maximum relative error for the double precision variant is
+ * ~ 1e-13 for very small and very large values.
+ * This is ~2x faster than GNU libm's approach, which is still off by 2ulp on
+ * some inputs.
+ * @param x exponent
+ * @return 10^x
+ */
+static av_always_inline double ff_exp10(double x)
+{
+    return exp2(M_LOG2_10 * x);
+}
+
+static av_always_inline float ff_exp10f(float x)
+{
+    return exp2f(M_LOG2_10 * x);
+}
+
+/**
+ * Compute x^y for floating point x, y. Note: this function is faster than the
+ * libm variant due to mainly 2 reasons:
+ * 1. It does not handle any edge cases. In particular, this is only guaranteed
+ * to work correctly for x > 0.
+ * 2. It is not as accurate as a standard nearly "correctly rounded" libm variant.
+ * @param x base
+ * @param y exponent
+ * @return x^y
+ */
+static av_always_inline float ff_fast_powf(float x, float y)
+{
+    return expf(logf(x) * y);
+}
+
+#endif /* AVUTIL_FFMATH_H */

ffmpeg/libavutil/fifo.c

@@ -0,0 +1,292 @@
+/*
+ * a very simple circular buffer FIFO implementation
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ * Copyright (c) 2006 Roman Shaposhnik
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+#include <string.h>
+
+#include "avassert.h"
+#include "error.h"
+#include "fifo.h"
+#include "macros.h"
+#include "mem.h"
+
+// by default the FIFO can be auto-grown to 1MB
+#define AUTO_GROW_DEFAULT_BYTES (1024 * 1024)
+
+struct AVFifo {
+    uint8_t *buffer;
+
+    size_t elem_size, nb_elems;
+    size_t offset_r, offset_w;
+    // distinguishes the ambiguous situation offset_r == offset_w
+    int    is_empty;
+
+    unsigned int flags;
+    size_t       auto_grow_limit;
+};
+
+AVFifo *av_fifo_alloc2(size_t nb_elems, size_t elem_size,
+                       unsigned int flags)
+{
+    AVFifo *f;
+    void *buffer = NULL;
+
+    if (!elem_size)
+        return NULL;
+
+    if (nb_elems) {
+        buffer = av_realloc_array(NULL, nb_elems, elem_size);
+        if (!buffer)
+            return NULL;
+    }
+    f = av_mallocz(sizeof(*f));
+    if (!f) {
+        av_free(buffer);
+        return NULL;
+    }
+    f->buffer    = buffer;
+    f->nb_elems  = nb_elems;
+    f->elem_size = elem_size;
+    f->is_empty  = 1;
+
+    f->flags           = flags;
+    f->auto_grow_limit = FFMAX(AUTO_GROW_DEFAULT_BYTES / elem_size, 1);
+
+    return f;
+}
+
+void av_fifo_auto_grow_limit(AVFifo *f, size_t max_elems)
+{
+    f->auto_grow_limit = max_elems;
+}
+
+size_t av_fifo_elem_size(const AVFifo *f)
+{
+    return f->elem_size;
+}
+
+size_t av_fifo_can_read(const AVFifo *f)
+{
+    if (f->offset_w <= f->offset_r && !f->is_empty)
+        return f->nb_elems - f->offset_r + f->offset_w;
+    return f->offset_w - f->offset_r;
+}
+
+size_t av_fifo_can_write(const AVFifo *f)
+{
+    return f->nb_elems - av_fifo_can_read(f);
+}
+
+int av_fifo_grow2(AVFifo *f, size_t inc)
+{
+    uint8_t *tmp;
+
+    if (inc > SIZE_MAX - f->nb_elems)
+        return AVERROR(EINVAL);
+
+    tmp = av_realloc_array(f->buffer, f->nb_elems + inc, f->elem_size);
+    if (!tmp)
+        return AVERROR(ENOMEM);
+    f->buffer = tmp;
+
+    // move the data from the beginning of the ring buffer
+    // to the newly allocated space
+    if (f->offset_w <= f->offset_r && !f->is_empty) {
+        const size_t copy = FFMIN(inc, f->offset_w);
+        memcpy(tmp + f->nb_elems * f->elem_size, tmp, copy * f->elem_size);
+        if (copy < f->offset_w) {
+            memmove(tmp, tmp + copy * f->elem_size,
+                    (f->offset_w - copy) * f->elem_size);
+            f->offset_w -= copy;
+        } else
+            f->offset_w = copy == inc ? 0 : f->nb_elems + copy;
+    }
+
+    f->nb_elems += inc;
+
+    return 0;
+}
+
+static int fifo_check_space(AVFifo *f, size_t to_write)
+{
+    const size_t can_write = av_fifo_can_write(f);
+    const size_t need_grow = to_write > can_write ? to_write - can_write : 0;
+    size_t can_grow;
+
+    if (!need_grow)
+        return 0;
+
+    can_grow = f->auto_grow_limit > f->nb_elems ?
+               f->auto_grow_limit - f->nb_elems : 0;
+    if ((f->flags & AV_FIFO_FLAG_AUTO_GROW) && need_grow <= can_grow) {
+        // allocate a bit more than necessary, if we can
+        const size_t inc = (need_grow < can_grow / 2 ) ? need_grow * 2 : can_grow;
+        return av_fifo_grow2(f, inc);
+    }
+
+    return AVERROR(ENOSPC);
+}
+
+static int fifo_write_common(AVFifo *f, const uint8_t *buf, size_t *nb_elems,
+                             AVFifoCB read_cb, void *opaque)
+{
+    size_t to_write = *nb_elems;
+    size_t offset_w;
+    int         ret = 0;
+
+    ret = fifo_check_space(f, to_write);
+    if (ret < 0)
+        return ret;
+
+    offset_w = f->offset_w;
+
+    while (to_write > 0) {
+        size_t    len = FFMIN(f->nb_elems - offset_w, to_write);
+        uint8_t *wptr = f->buffer + offset_w * f->elem_size;
+
+        if (read_cb) {
+            ret = read_cb(opaque, wptr, &len);
+            if (ret < 0 || len == 0)
+                break;
+        } else {
+            memcpy(wptr, buf, len * f->elem_size);
+            buf += len * f->elem_size;
+        }
+        offset_w += len;
+        if (offset_w >= f->nb_elems)
+            offset_w = 0;
+        to_write -= len;
+    }
+    f->offset_w = offset_w;
+
+    if (*nb_elems != to_write)
+        f->is_empty = 0;
+    *nb_elems -= to_write;
+
+    return ret;
+}
+
+int av_fifo_write(AVFifo *f, const void *buf, size_t nb_elems)
+{
+    return fifo_write_common(f, buf, &nb_elems, NULL, NULL);
+}
+
+int av_fifo_write_from_cb(AVFifo *f, AVFifoCB read_cb,
+                          void *opaque, size_t *nb_elems)
+{
+    return fifo_write_common(f, NULL, nb_elems, read_cb, opaque);
+}
+
+static int fifo_peek_common(const AVFifo *f, uint8_t *buf, size_t *nb_elems,
+                            size_t offset, AVFifoCB write_cb, void *opaque)
+{
+    size_t  to_read = *nb_elems;
+    size_t offset_r = f->offset_r;
+    size_t can_read = av_fifo_can_read(f);
+    int         ret = 0;
+
+    if (offset > can_read || to_read > can_read - offset) {
+        *nb_elems = 0;
+        return AVERROR(EINVAL);
+    }
+
+    if (offset_r >= f->nb_elems - offset)
+        offset_r -= f->nb_elems - offset;
+    else
+        offset_r += offset;
+
+    while (to_read > 0) {
+        size_t    len = FFMIN(f->nb_elems - offset_r, to_read);
+        uint8_t *rptr = f->buffer + offset_r * f->elem_size;
+
+        if (write_cb) {
+            ret = write_cb(opaque, rptr, &len);
+            if (ret < 0 || len == 0)
+                break;
+        } else {
+            memcpy(buf, rptr, len * f->elem_size);
+            buf += len * f->elem_size;
+        }
+        offset_r += len;
+        if (offset_r >= f->nb_elems)
+            offset_r = 0;
+        to_read -= len;
+    }
+
+    *nb_elems -= to_read;
+
+    return ret;
+}
+
+int av_fifo_read(AVFifo *f, void *buf, size_t nb_elems)
+{
+    int ret = fifo_peek_common(f, buf, &nb_elems, 0, NULL, NULL);
+    av_fifo_drain2(f, nb_elems);
+    return ret;
+}
+
+int av_fifo_read_to_cb(AVFifo *f, AVFifoCB write_cb,
+                       void *opaque, size_t *nb_elems)
+{
+    int ret = fifo_peek_common(f, NULL, nb_elems, 0, write_cb, opaque);
+    av_fifo_drain2(f, *nb_elems);
+    return ret;
+}
+
+int av_fifo_peek(const AVFifo *f, void *buf, size_t nb_elems, size_t offset)
+{
+    return fifo_peek_common(f, buf, &nb_elems, offset, NULL, NULL);
+}
+
+int av_fifo_peek_to_cb(const AVFifo *f, AVFifoCB write_cb, void *opaque,
+                       size_t *nb_elems, size_t offset)
+{
+    return fifo_peek_common(f, NULL, nb_elems, offset, write_cb, opaque);
+}
+
+void av_fifo_drain2(AVFifo *f, size_t size)
+{
+    const size_t cur_size = av_fifo_can_read(f);
+
+    av_assert0(cur_size >= size);
+    if (cur_size == size)
+        f->is_empty = 1;
+
+    if (f->offset_r >= f->nb_elems - size)
+        f->offset_r -= f->nb_elems - size;
+    else
+        f->offset_r += size;
+}
+
+void av_fifo_reset2(AVFifo *f)
+{
+    f->offset_r = f->offset_w = 0;
+    f->is_empty = 1;
+}
+
+void av_fifo_freep2(AVFifo **f)
+{
+    if (*f) {
+        av_freep(&(*f)->buffer);
+        av_freep(f);
+    }
+}

ffmpeg/libavutil/fifo.h

@@ -0,0 +1,242 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_fifo
+ * A generic FIFO API
+ */
+
+#ifndef AVUTIL_FIFO_H
+#define AVUTIL_FIFO_H
+
+#include <stddef.h>
+
+/**
+ * @defgroup lavu_fifo AVFifo
+ * @ingroup lavu_data
+ *
+ * @{
+ * A generic FIFO API
+ */
+
+typedef struct AVFifo AVFifo;
+
+/**
+ * Callback for writing or reading from a FIFO, passed to (and invoked from) the
+ * av_fifo_*_cb() functions. It may be invoked multiple times from a single
+ * av_fifo_*_cb() call and may process less data than the maximum size indicated
+ * by nb_elems.
+ *
+ * @param opaque the opaque pointer provided to the av_fifo_*_cb() function
+ * @param buf the buffer for reading or writing the data, depending on which
+ *            av_fifo_*_cb function is called
+ * @param nb_elems On entry contains the maximum number of elements that can be
+ *                 read from / written into buf. On success, the callback should
+ *                 update it to contain the number of elements actually written.
+ *
+ * @return 0 on success, a negative error code on failure (will be returned from
+ *         the invoking av_fifo_*_cb() function)
+ */
+typedef int AVFifoCB(void *opaque, void *buf, size_t *nb_elems);
+
+/**
+ * Automatically resize the FIFO on writes, so that the data fits. This
+ * automatic resizing happens up to a limit that can be modified with
+ * av_fifo_auto_grow_limit().
+ */
+#define AV_FIFO_FLAG_AUTO_GROW      (1 << 0)
+
+/**
+ * Allocate and initialize an AVFifo with a given element size.
+ *
+ * @param elems     initial number of elements that can be stored in the FIFO
+ * @param elem_size Size in bytes of a single element. Further operations on
+ *                  the returned FIFO will implicitly use this element size.
+ * @param flags a combination of AV_FIFO_FLAG_*
+ *
+ * @return newly-allocated AVFifo on success, a negative error code on failure
+ */
+AVFifo *av_fifo_alloc2(size_t elems, size_t elem_size,
+                       unsigned int flags);
+
+/**
+ * @return Element size for FIFO operations. This element size is set at
+ *         FIFO allocation and remains constant during its lifetime
+ */
+size_t av_fifo_elem_size(const AVFifo *f);
+
+/**
+ * Set the maximum size (in elements) to which the FIFO can be resized
+ * automatically. Has no effect unless AV_FIFO_FLAG_AUTO_GROW is used.
+ */
+void av_fifo_auto_grow_limit(AVFifo *f, size_t max_elems);
+
+/**
+ * @return number of elements available for reading from the given FIFO.
+ */
+size_t av_fifo_can_read(const AVFifo *f);
+
+/**
+ * @return Number of elements that can be written into the given FIFO without
+ *         growing it.
+ *
+ *         In other words, this number of elements or less is guaranteed to fit
+ *         into the FIFO. More data may be written when the
+ *         AV_FIFO_FLAG_AUTO_GROW flag was specified at FIFO creation, but this
+ *         may involve memory allocation, which can fail.
+ */
+size_t av_fifo_can_write(const AVFifo *f);
+
+/**
+ * Enlarge an AVFifo.
+ *
+ * On success, the FIFO will be large enough to hold exactly
+ * inc + av_fifo_can_read() + av_fifo_can_write()
+ * elements. In case of failure, the old FIFO is kept unchanged.
+ *
+ * @param f AVFifo to resize
+ * @param inc number of elements to allocate for, in addition to the current
+ *            allocated size
+ * @return a non-negative number on success, a negative error code on failure
+ */
+int av_fifo_grow2(AVFifo *f, size_t inc);
+
+/**
+ * Write data into a FIFO.
+ *
+ * In case nb_elems > av_fifo_can_write(f) and the AV_FIFO_FLAG_AUTO_GROW flag
+ * was not specified at FIFO creation, nothing is written and an error
+ * is returned.
+ *
+ * Calling function is guaranteed to succeed if nb_elems <= av_fifo_can_write(f).
+ *
+ * @param f the FIFO buffer
+ * @param buf Data to be written. nb_elems * av_fifo_elem_size(f) bytes will be
+ *            read from buf on success.
+ * @param nb_elems number of elements to write into FIFO
+ *
+ * @return a non-negative number on success, a negative error code on failure
+ */
+int av_fifo_write(AVFifo *f, const void *buf, size_t nb_elems);
+
+/**
+ * Write data from a user-provided callback into a FIFO.
+ *
+ * @param f the FIFO buffer
+ * @param read_cb Callback supplying the data to the FIFO. May be called
+ *                multiple times.
+ * @param opaque opaque user data to be provided to read_cb
+ * @param nb_elems Should point to the maximum number of elements that can be
+ *                 written. Will be updated to contain the number of elements
+ *                 actually written.
+ *
+ * @return non-negative number on success, a negative error code on failure
+ */
+int av_fifo_write_from_cb(AVFifo *f, AVFifoCB read_cb,
+                          void *opaque, size_t *nb_elems);
+
+/**
+ * Read data from a FIFO.
+ *
+ * In case nb_elems > av_fifo_can_read(f), nothing is read and an error
+ * is returned.
+ *
+ * @param f the FIFO buffer
+ * @param buf Buffer to store the data. nb_elems * av_fifo_elem_size(f) bytes
+ *            will be written into buf on success.
+ * @param nb_elems number of elements to read from FIFO
+ *
+ * @return a non-negative number on success, a negative error code on failure
+ */
+int av_fifo_read(AVFifo *f, void *buf, size_t nb_elems);
+
+/**
+ * Feed data from a FIFO into a user-provided callback.
+ *
+ * @param f the FIFO buffer
+ * @param write_cb Callback the data will be supplied to. May be called
+ *                 multiple times.
+ * @param opaque opaque user data to be provided to write_cb
+ * @param nb_elems Should point to the maximum number of elements that can be
+ *                 read. Will be updated to contain the total number of elements
+ *                 actually sent to the callback.
+ *
+ * @return non-negative number on success, a negative error code on failure
+ */
+int av_fifo_read_to_cb(AVFifo *f, AVFifoCB write_cb,
+                       void *opaque, size_t *nb_elems);
+
+/**
+ * Read data from a FIFO without modifying FIFO state.
+ *
+ * Returns an error if an attempt is made to peek to nonexistent elements
+ * (i.e. if offset + nb_elems is larger than av_fifo_can_read(f)).
+ *
+ * @param f the FIFO buffer
+ * @param buf Buffer to store the data. nb_elems * av_fifo_elem_size(f) bytes
+ *            will be written into buf.
+ * @param nb_elems number of elements to read from FIFO
+ * @param offset number of initial elements to skip.
+ *
+ * @return a non-negative number on success, a negative error code on failure
+ */
+int av_fifo_peek(const AVFifo *f, void *buf, size_t nb_elems, size_t offset);
+
+/**
+ * Feed data from a FIFO into a user-provided callback.
+ *
+ * @param f the FIFO buffer
+ * @param write_cb Callback the data will be supplied to. May be called
+ *                 multiple times.
+ * @param opaque opaque user data to be provided to write_cb
+ * @param nb_elems Should point to the maximum number of elements that can be
+ *                 read. Will be updated to contain the total number of elements
+ *                 actually sent to the callback.
+ * @param offset number of initial elements to skip; offset + *nb_elems must not
+ *               be larger than av_fifo_can_read(f).
+ *
+ * @return a non-negative number on success, a negative error code on failure
+ */
+int av_fifo_peek_to_cb(const AVFifo *f, AVFifoCB write_cb, void *opaque,
+                       size_t *nb_elems, size_t offset);
+
+/**
+ * Discard the specified amount of data from an AVFifo.
+ * @param size number of elements to discard, MUST NOT be larger than
+ *             av_fifo_can_read(f)
+ */
+void av_fifo_drain2(AVFifo *f, size_t size);
+
+/*
+ * Empty the AVFifo.
+ * @param f AVFifo to reset
+ */
+void av_fifo_reset2(AVFifo *f);
+
+/**
+ * Free an AVFifo and reset pointer to NULL.
+ * @param f Pointer to an AVFifo to free. *f == NULL is allowed.
+ */
+void av_fifo_freep2(AVFifo **f);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_FIFO_H */

ffmpeg/libavutil/file.c

@@ -0,0 +1,153 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "error.h"
+#include "file.h"
+#include "file_open.h"
+#include "internal.h"
+#include "log.h"
+#include "mem.h"
+#include <fcntl.h>
+#include <sys/stat.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if HAVE_IO_H
+#include <io.h>
+#endif
+#if HAVE_MMAP
+#include <sys/mman.h>
+#elif HAVE_MAPVIEWOFFILE
+#include <windows.h>
+#endif
+
+typedef struct FileLogContext {
+    const AVClass *class;
+    int   log_offset;
+    void *log_ctx;
+} FileLogContext;
+
+static const AVClass file_log_ctx_class = {
+    .class_name                = "FILE",
+    .item_name                 = av_default_item_name,
+    .option                    = NULL,
+    .version                   = LIBAVUTIL_VERSION_INT,
+    .log_level_offset_offset   = offsetof(FileLogContext, log_offset),
+    .parent_log_context_offset = offsetof(FileLogContext, log_ctx),
+};
+
+int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
+                int log_offset, void *log_ctx)
+{
+    FileLogContext file_log_ctx = { &file_log_ctx_class, log_offset, log_ctx };
+    int err, fd = avpriv_open(filename, O_RDONLY);
+    struct stat st;
+    av_unused void *ptr;
+    off_t off_size;
+    *bufptr = NULL;
+    *size = 0;
+
+    if (fd < 0) {
+        err = AVERROR(errno);
+        av_log(&file_log_ctx, AV_LOG_ERROR, "Cannot read file '%s': %s\n", filename, av_err2str(err));
+        return err;
+    }
+
+    if (fstat(fd, &st) < 0) {
+        err = AVERROR(errno);
+        av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in fstat(): %s\n", av_err2str(err));
+        close(fd);
+        return err;
+    }
+
+    off_size = st.st_size;
+    if (off_size > SIZE_MAX) {
+        av_log(&file_log_ctx, AV_LOG_ERROR,
+               "File size for file '%s' is too big\n", filename);
+        close(fd);
+        return AVERROR(EINVAL);
+    }
+    *size = off_size;
+
+    if (!*size) {
+        *bufptr = NULL;
+        goto out;
+    }
+
+#if HAVE_MMAP
+    ptr = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
+    if (ptr == MAP_FAILED) {
+        err = AVERROR(errno);
+        av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in mmap(): %s\n", av_err2str(err));
+        close(fd);
+        *size = 0;
+        return err;
+    }
+    *bufptr = ptr;
+#elif HAVE_MAPVIEWOFFILE
+    {
+        HANDLE mh, fh = (HANDLE)_get_osfhandle(fd);
+
+        mh = CreateFileMapping(fh, NULL, PAGE_READONLY, 0, 0, NULL);
+        if (!mh) {
+            av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in CreateFileMapping()\n");
+            close(fd);
+            *size = 0;
+            return -1;
+        }
+
+        ptr = MapViewOfFile(mh, FILE_MAP_COPY, 0, 0, *size);
+        CloseHandle(mh);
+        if (!ptr) {
+            av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in MapViewOfFile()\n");
+            close(fd);
+            *size = 0;
+            return -1;
+        }
+
+        *bufptr = ptr;
+    }
+#else
+    *bufptr = av_malloc(*size);
+    if (!*bufptr) {
+        av_log(&file_log_ctx, AV_LOG_ERROR, "Memory allocation error occurred\n");
+        close(fd);
+        *size = 0;
+        return AVERROR(ENOMEM);
+    }
+    read(fd, *bufptr, *size);
+#endif
+
+out:
+    close(fd);
+    return 0;
+}
+
+void av_file_unmap(uint8_t *bufptr, size_t size)
+{
+    if (!size || !bufptr)
+        return;
+#if HAVE_MMAP
+    munmap(bufptr, size);
+#elif HAVE_MAPVIEWOFFILE
+    UnmapViewOfFile(bufptr);
+#else
+    av_free(bufptr);
+#endif
+}