android_multiviewwer/app/src/main/cpp/Renderer.h

#pragma once

#include "AnimationStrategy.h"
#include "TransitionStrategy.h"
#include "Preloader.h"
#include <string>
#include <sstream>
#include <iomanip>
#include <chrono>
#include <mutex>
#include <random>
#include <memory>
#include <android/native_window.h>
#include <android/native_window_jni.h>

class Renderer {
public:
    enum class AnimationMode {
        PAN = 0, ZOOM = 1, NONE = 2, RANDOM = 3,
        PAN_ONE_WAY = 4, PAGE_TURN = 5
    };
    enum class TransitionMode {
        FADE = 0, SLIDE = 1, RANDOM = 2, MOSAIC = 3
    };

    Renderer();
    ~Renderer();

    void setNextMedia(int fd);
    void renderFrame(ANativeWindow* window);
    void release();
    std::string getDebugInfo() const;

    void startRenderLoop(ANativeWindow* window);
    void stopRenderLoop();

    void setAnimationSpeed(float speed);
    void setAnimationMode(int mode);
    void setFadeDuration(int durationMs);
    void setPageTurnDelay(int delayMs);
    void setTransitionMode(int mode);

    void drawMedia(ANativeWindow_Buffer& buffer, MediaAsset& media, float alpha, float finalOffsetX, float finalOffsetY, float finalScale);
    void renderVideoFrame(MediaAsset& media, ANativeWindow_Buffer& buffer, float scale, float offsetX, float offsetY, float alpha);
    void renderImageFrame(const MediaAsset& media, ANativeWindow_Buffer& buffer, float scale, float offsetX, float offsetY, float alpha);
    void calculateFitScaleAndOffset(const MediaAsset& media, int surfaceWidth, int surfaceHeight,
                                    float& outScale, float& outOffsetX, float& outOffsetY) const;

private:

    std::thread renderThread_;
    std::atomic<bool> isRunning_{false};
    ANativeWindow* nativeWindow_ = nullptr;

    enum class RenderState { ANIMATING, TRANSITIONING };
    RenderState currentState_ = RenderState::ANIMATING;

    void handleAnimationState(ANativeWindow_Buffer& buffer, int surfaceWidth, int surfaceHeight);
    void handleTransitionState(ANativeWindow_Buffer& buffer, int surfaceWidth, int surfaceHeight);

    std::mutex renderMutex_;
    Preloader preloader_;
    MediaAsset currentMedia_;
    MediaAsset nextMedia_;

    std::unique_ptr<AnimationStrategy> animationStrategy_;
    AnimationMode predictedNextAnimationMode_;
    std::unique_ptr<TransitionStrategy> transitionStrategy_;
    AnimationState lastAnimationState_;

    AnimationMode configuredAnimationMode_ = AnimationMode::PAN;
    TransitionMode configuredTransitionMode_ = TransitionMode::FADE;
    AnimationMode activeAnimationMode_ = AnimationMode::PAN;
    long long fadeDurationMs_ = 3000;
    long long pageTurnDelayMs_ = 5000;
    float animationSpeed_ = 1.0f;
    // --- ⬇️ 목표 프레임 딜레이 변수 추가 ⬇️ ---
    std::chrono::milliseconds currentFrameDelay_{33}; // 기본값 33ms (약 30fps)

    AnimationState getStartStateForMode(AnimationMode mode, int surfaceWidth, int surfaceHeight);
    AnimationMode predictNextAnimationMode();

    std::chrono::steady_clock::time_point transitionStartTime_;
    std::mt19937 randomEngine_;

    void determineActiveAnimationMode();
};