codec_video.h

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// SPDX-License-Identifier: AGPL-3.0-or-later
 
#ifndef __CODEC_VIDEO_H
#define __CODEC_VIDEO_H
 
#include <mutex>
 
extern "C" {
#include <libavcodec/avcodec.h>
}
 
class cVideoDecoder {
public:
    cVideoDecoder(const char *);
    int Open(enum AVCodecID, AVCodecParameters *, AVRational, bool, int, int);
    void Close(void);
    int SendPacket(const AVPacket *);
    int ReceiveFrame(AVFrame **);
    void FlushBuffers(void);
    int ReopenCodec(enum AVCodecID, AVCodecParameters *, AVRational, int);
    AVCodecContext *GetContext(void) { return m_pVideoCtx; };
    bool IsHardwareDecoder(void) { return m_isHardwareDecoder; };
    const char *Name(void) { return m_pCodecString; };
    int GetPacketsSent(void) { return m_cntPacketsSent; };
    int GetFramesReceived(void) { return m_cntFramesReceived; };
    void SetSkipKeyFramesNum(int num) { m_skipKeyFramesNum = num; };
 
private:
    AVCodecContext *m_pVideoCtx = nullptr;  
    const char *m_identifier;               
    const char *m_pCodecString = "unknown"; 
    std::mutex m_mutex;                     
    int m_cntPacketsSent;                   
    int m_cntFramesReceived;                
    int m_cntStartKeyFrames;                
    int m_lastCodedWidth;                   
    int m_lastCodedHeight;                  
    int m_skipKeyFramesNum = 0;             
    bool m_isHardwareDecoder = false;       
 
    int GetExtraData(const AVPacket *);
    bool IsKeyFrame(AVFrame *);
};
 
#endif