#ifndef _MMREG_H#define _MMREG_H#if __GNUC__ >= 3#pragma GCC system_header#endif#ifndef _MMSYSTEM_H#include <mmsystem.h>#endif#ifdef __cplusplusextern "C" {#endif/*--- DirectShow Reference - DirectShow Structures */typedef struct mpeg1waveformat_tag {	WAVEFORMATEX wfx;	WORD fwHeadLayer;	DWORD dwHeadBitrate;	WORD fwHeadMode;	WORD fwHeadModeExt;	WORD wHeadEmphasis;	WORD fwHeadFlags;	DWORD dwPTSLow;	DWORD dwPTSHigh;} MPEG1WAVEFORMAT;#define ACM_MPEG_LAYER1 0x0001#define ACM_MPEG_LAYER2 0x0002#define ACM_MPEG_LAYER3 0x0004#define ACM_MPEG_STEREO 0x0001#define ACM_MPEG_JOINTSTEREO 0x0002#define ACM_MPEG_DUALCHANNEL 0x0004#define ACM_MPEG_SINGLECHANNEL 0x0008#define ACM_MPEG_PRIVATEBIT 0x0001#define ACM_MPEG_COPYRIGHT 0x0002#define ACM_MPEG_ORIGINALHOME 0x0004#define ACM_MPEG_PROTECTIONBIT 0x0008#define ACM_MPEG_ID_MPEG1 0x0010typedef struct {	WAVEFORMATEX Format;	union {		WORD wValidBitsPerSample;		WORD wSamplesPerBlock;		WORD wReserved;	} Samples;	DWORD dwChannelMask; 	GUID SubFormat;} WAVEFORMATEXTENSIBLE,*PWAVEFORMATEXTENSIBLE;#define SPEAKER_FRONT_LEFT 0x1#define SPEAKER_FRONT_RIGHT 0x2#define SPEAKER_FRONT_CENTER 0x4#define SPEAKER_LOW_FREQUENCY 0x8#define SPEAKER_BACK_LEFT 0x10#define SPEAKER_BACK_RIGHT 0x20#define SPEAKER_FRONT_LEFT_OF_CENTER 0x40#define SPEAKER_FRONT_RIGHT_OF_CENTER 0x80#define SPEAKER_BACK_CENTER 0x100#define SPEAKER_SIDE_LEFT 0x200#define SPEAKER_SIDE_RIGHT 0x400#define SPEAKER_TOP_CENTER 0x800#define SPEAKER_TOP_FRONT_LEFT 	0x1000#define SPEAKER_TOP_FRONT_CENTER 0x2000#define SPEAKER_TOP_FRONT_RIGHT 0x4000#define SPEAKER_TOP_BACK_LEFT 0x8000#define SPEAKER_TOP_BACK_CENTER 0x10000#define SPEAKER_TOP_BACK_RIGHT 0x20000#ifdef __cplusplus}#endif#endif