decoder.h

#ifndef DECODER_H
#define DECODER_H

#include <QThread>
#include <QImage>

extern "C"
{
#include "libavfilter/avfiltergraph.h"
#include "libavfilter/buffersink.h"
#include "libavfilter/buffersrc.h"
#include "libswscale/swscale.h"
#include "libavdevice/avdevice.h"
#include "libavutil/pixfmt.h"
#include "libavutil/opt.h"
#include "libavcodec/avfft.h"
#include "libavutil/imgutils.h"
}

#include "audiodecoder.h"

class Decoder : public QThread
{
    Q_OBJECT

public:
    enum PlayState {
        STOP,
        PAUSE,
        PLAYING,
        FINISH
    };

    explicit Decoder();
    ~Decoder();

    double getCurrentTime();
    void seekProgress(qint64 pos);
    int getVolume();
    void setVolume(int volume);

private:
    void run();
    void clearData();
    void setPlayState(Decoder::PlayState state);
    void displayVideo(QImage image);
    static int videoThread(void *arg);
    double synchronize(AVFrame *frame, double pts);
    bool isRealtime(AVFormatContext *pFormatCtx);
    int initFilter();

    int fileType;

    int videoIndex;
    int audioIndex;
    int subtitleIndex;

    QString currentFile;
    QString currentType;

    qint64 timeTotal;

    AVPacket seekPacket;
    qint64 seekPos;
    double seekTime;

    PlayState playState;
    bool isStop;
    bool gotStop;
    bool isPause;
    bool isSeek;
    bool isReadFinished;
    bool isDecodeFinished;

    AVFormatContext *pFormatCtx;

    AVCodecContext *pCodecCtx;          // video codec context

    AvPacketQueue videoQueue;
    AvPacketQueue subtitleQueue;

    AVStream *videoStream;

    double videoClk;    // video frame timestamp

    AudioDecoder *audioDecoder;

    AVFilterGraph   *filterGraph;
    AVFilterContext *filterSinkCxt;
    AVFilterContext *filterSrcCxt;

public slots:
    void decoderFile(QString file, QString type);
    void stopVideo();
    void pauseVideo();
    void audioFinished();

signals:
    void readFinished();
    void gotVideo(QImage image);
    void gotVideoTime(qint64 time);
    void playStateChanged(Decoder::PlayState state);

};

#endif // DECODER_H