video-pc/AvPlayer/AudioPlayer.h

#pragma once

extern "C" {
#include <libavutil/channel_layout.h>
#include <libavutil/frame.h>
#include <libavutil/samplefmt.h>
#include <libswresample/swresample.h>
}

struct sonicStreamStruct;

#include <QAudioOutput>
#include <QIODevice>

class AudioPlayer {
public:
    AudioPlayer();
    ~AudioPlayer();
    void init(const AVFrame* frame, float speed);
    void setSpeed(float speed);
    void play(AVFrame* frame, float speed = 1.0f);
    void reset();
    void setOutputDevice(QIODevice* device);
    void setAudioOutput(QAudioOutput* output);
    QIODevice* getOutputDevice() const;
    QAudioOutput* getAudioOutput() const;
    bool needReinit(const AVFrame* frame, float speed) const;
private:
    int m_sampleRate = 0;
    int m_channels = 0;
    AVSampleFormat m_format = AV_SAMPLE_FMT_NONE;
    sonicStreamStruct* m_sonicCtx = nullptr;
    int m_maxBufSize = -1;
    uint8_t* m_abuf = nullptr;
    uint8_t* m_abufOut = nullptr;
    unsigned int m_abufOutSize = 0;
    void freeBuffers();
    // swresample相关
    SwrContext* m_swrCtx = nullptr;
    uint8_t* m_swrBuffer = nullptr;
    int m_swrBufferSize = 0;
    // Qt音频相关
    QAudioOutput* m_audioOutput = nullptr;
    QIODevice* m_audioDevice = nullptr;
    float m_lastSpeed = 1.0f;
    void initAudioOutput(const AVFrame* frame, float speed);
};