videobuffer.h

VC++视频开发实例集锦(包括“远程视频监控”"语音识别系统"等13个经典例子)

/**************************************************************************************
 *                                                                                    *
 *                                                                                    *
 **************************************************************************************/

#ifndef VIDEO_BUFFER_H
#define VIDEO_BUFFER_H

#include "MediaClasses.h"

/*
 * 定义
 */ 

#define VIDEO_BUFFER_SIZE                5
#define VIDEO_BUFFER_END_NOT_REACHED 32768

/* 
 * Video Buffer Class
 *
 *  ——只执行一次
 *
 */

class MediaVideoBuffer : public MediaItemVideoBuffer {

public:

	MediaBuffer           *buffer[VIDEO_BUFFER_SIZE];
	MediaItemVideoDecoder *decoder;

	DWORD                  bufferedFrames;
	HANDLE                 bufferingMutex;
	HANDLE                 bufferingThread;
	DWORD                  bufferingThreadId;

	unsigned int           stride;
	BOOL                   suspended;
	DWORD                  endReachedAt;

	BOOL                   enabled;

	MediaVideoBuffer();
	~MediaVideoBuffer();

	/*
	 * 媒体项方法
	 */

	media_type_t  GetType();
	char         *GetName();

	MP_RESULT     Connect(MediaItem *item);
	MP_RESULT     ReleaseConnections();

	DWORD         GetCaps();
	MP_RESULT     Configure(HINSTANCE hInstance, HWND hwnd);

	/*
	 * 视频缓冲方法
	 */

	MP_RESULT     StartBuffering(unsigned int stride);
	MP_RESULT     StopBuffering();

	MediaBuffer  *GetOneFrame();
	MediaBuffer  *GetLastFrame();
	MP_RESULT     DropOneFrame();

};

#endif