audiorenderer.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 AUDIO_RENDERER_H
#define AUDIO_RENDERER_H

#include "MediaClasses.h"
#include "DebugFile.h"


/*
 * 包括直接音频
 */

#include <math.h>
#include <dsound.h>

/*
 * Audio Renderer Class
 *
 *  ——某一刻只有一个可用
 *
 */

class MediaAudioRenderer : public MediaItemAudioRenderer {

public:

	LPDIRECTSOUND       lpDirectSound;
	LPDIRECTSOUNDBUFFER lpBuffer;
	WAVEFORMATEX       *ourFormat;

    DWORD               dwBufferSize;     
    DWORD               dwNextWriteOffset; 
    DWORD               dwProgress;
	DWORD               dwLastPlayPos;
	
	unsigned long       dwPlayed;
	
	HANDLE              audioThread;
	UINT                uTimerID;
	LONG                lInTimer;
	DWORD               id;
	
	MediaAudioCallback  callback;
	void               *lpData;
	int                 paused;

	/*
	 * 方法
	 *
	 */

	MediaAudioRenderer();
	~MediaAudioRenderer();

	/*
	 * 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);

	/*
	 * 音频补偿方法
	 */

	MP_RESULT     Open(HWND hwnd, WAVEFORMATEX *inFormat);

	MP_RESULT     SetCallback(void *lpData, MediaAudioCallback callback);
	MP_RESULT     SetVolume(unsigned int volume);

	unsigned long GetAudioTime();
	MP_RESULT     Bufferize();

	MP_RESULT     Start();
	MP_RESULT     Pause();
	MP_RESULT     Stop();

	MP_RESULT     Close();
};

#endif