多媒体编程

开发平台：

Visual C++

Decaps.h：源码内容

							/**************************************************************************************
 *                                                                                    *
 *                                                                                    *
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#ifndef DECAPS_H
#define DECAPS_H
#include "MediaClasses.h"
#include "DecapsAVI.h"
class MediaDecaps : public MediaItemDecaps {
private:
	MediaDecapsAVI  *decapsAVI;
	MediaItemDecaps *decaps;
public:
	MediaDecaps();
	~MediaDecaps();
	media_type_t  GetType();
	char         *GetName();
	
	MP_RESULT     Connect(MediaItem *item);
	MP_RESULT     ReleaseConnections();
	DWORD         GetCaps();
	MP_RESULT     Configure(HINSTANCE hInstance, HWND hwnd);
	unsigned int  GetNumberOfVideoStreams();
	unsigned int  GetNumberOfAudioStreams();
	unsigned int  GetVideoWidth(unsigned int StreamId);
	unsigned int  GetVideoHeight(unsigned int StreamId);
	double        GetVideoFrameRate(unsigned int StreamId);
	char         *GetVideoCompression(unsigned int StreamId);
	BITMAPINFOHEADER *GetVideoHeader(unsigned int StramId);
	unsigned long GetCurrentVideoFrame(unsigned int StreamId);
	unsigned long GetTotalVideoFrames(unsigned int StreamId);
	unsigned long GetTotalVideoTime(unsigned int StreamId);
	WAVEFORMATEX *GetAudioFormat(unsigned int StreamId);
	
	unsigned int  GetAudioBits(unsigned int StreamId);
	unsigned int  GetAudioChannels(unsigned int StreamId);
	unsigned int  GetAudioFrequency(unsigned int StreamId);
	unsigned int  GetNextVideoFrameSize(unsigned int StreamId);
	unsigned int  ReadVideoFrame(unsigned int StreamId, MediaBuffer *mb);
	unsigned int  ReadAudioData(unsigned int StreamId, char *buffer, unsigned int bytes);
	MP_RESULT     UpdateForSize();
	MP_RESULT     SeekAudio(unsigned int StreamId, long bytes);
	MP_RESULT     SeekVideo(unsigned int StreamId, long frame);
	MP_RESULT     ReSeekAudio(unsigned int StreamId);
	MP_RESULT     Seek(unsigned int videoStreamId, unsigned int audioStreamId, int percent);
	MP_RESULT     Rewind(unsigned int videoStreamId, unsigned int audioStreamId);
	MP_RESULT     SeekNextKeyFrame(unsigned int StreamId);
	MP_RESULT     SeekPreviousKeyFrame(unsigned int StreamId);
};
#endif 

						