VideoPlayerImpl.h

#ifndef VIDEOPLAYERIMPL_H
#define VIDEOPLAYERIMPL_H
#include "CVImage.h"
#include <QString>
static constexpr short INVALID_VIDEO_FRAME_N = -1;
 
enum class VideoPlayerOpenErrorCode {
    NoError, 
    DupOpen, 
    FileUnExsited, 
    OpenFailed, 
};
 
struct VideoPlayerInfo {
    int fps;
    int width;
    int height;
};
 
class VideoPlayerImpl {
public:
    VideoPlayerImpl() = default;
    virtual ~VideoPlayerImpl() = default;
    Q_DISABLE_COPY(VideoPlayerImpl);
 
    /* data interfaces */
    /* current video owns frame waiting for display */
    virtual int total_frame() const = 0;
 
    virtual int current_frame() = 0;
 
    virtual bool rollto_nextFrame(CVImage& container) = 0;
    virtual bool peek_frame(CVImage& container, int frame_request) = 0;
    virtual VideoPlayerInfo current_video_info() const = 0;
 
    virtual void escapeFrame() = 0;
 
    virtual void jumpToFrame(int frame_request) = 0;
 
    /*
     *  Function interfaces
     */
 
    virtual bool open(const char* filename, VideoPlayerOpenErrorCode& error_code) = 0;
 
    virtual bool isOpened() const = 0;
 
    virtual void close() = 0;
};
 
class VideoPlayerImplFactory {
public:
    static VideoPlayerImpl* request_impl();
};
 
#endif // VIDEOPLAYERIMPL_H