windows-xp/Source/XPSP1/NT/multimedia/media/avi/inc/waveff.h

/****************************************************************************
 *
 *   waveff.h  - Audio Compression Manager File Formats Public Header File
 *
 *   Copyright (c) 1991-1992 Microsoft Corporation.  All Rights Reserved.
 *
 ***************************************************************************/

#ifndef _INC_WAVEFF
#define _INC_WAVEFF      /* #defined if waveff.h has been included */

#ifndef WAVE_FORMAT_PCM

/* general waveform format structure (information common to all formats) */
typedef struct waveformat_tag {
    WORD    wFormatTag;        /* format type */
    WORD    nChannels;         /* number of channels (i.e. mono, stereo...) */
    DWORD   nSamplesPerSec;    /* sample rate */
    DWORD   nAvgBytesPerSec;   /* for buffer estimation */
    WORD    nBlockAlign;       /* block size of data */
} WAVEFORMAT;
typedef WAVEFORMAT       *PWAVEFORMAT;
typedef WAVEFORMAT NEAR *NPWAVEFORMAT;
typedef WAVEFORMAT FAR  *LPWAVEFORMAT;

/* flags for wFormatTag field of WAVEFORMAT */
#define WAVE_FORMAT_PCM     1

/* specific waveform format structure for PCM data */
typedef struct pcmwaveformat_tag {
    WAVEFORMAT  wf;
    WORD        wBitsPerSample;
} PCMWAVEFORMAT;
typedef PCMWAVEFORMAT       *PPCMWAVEFORMAT;
typedef PCMWAVEFORMAT NEAR *NPPCMWAVEFORMAT;
typedef PCMWAVEFORMAT FAR  *LPPCMWAVEFORMAT;


#endif /* WAVE_FORMAT_PCM */



/* general extended waveform format structure */
/* Use this for all NON PCM formats */
/* (information common to all formats) */
typedef struct waveformat_extended_tag {
    WORD    wFormatTag;        /* format type */
    WORD    nChannels;         /* number of channels (i.e. mono, stereo...) */
    DWORD   nSamplesPerSec;    /* sample rate */
    DWORD   nAvgBytesPerSec;   /* for buffer estimation */
    WORD    nBlockAlign;       /* block size of data */
    WORD    wBitsPerSample;    /* Number of bits per sample of mono data */
    WORD    cbSize;	       /* The count in bytes of the size */
				    /* SPECIFY TOTAL OR EXTRA */
} WAVEFORMATEX;
typedef WAVEFORMATEX       *PWAVEFORMATEX;
typedef WAVEFORMATEX NEAR *NPWAVEFORMATEX;
typedef WAVEFORMATEX FAR  *LPWAVEFORMATEX;

/* Define data for MS ADPCM */
#define WAVE_FORMAT_ADPCM     2

typedef struct adpcmcoef_tag {
	short	iCoef1;
	short	iCoef2;
} ADPCMCOEFSET;
typedef ADPCMCOEFSET       *PADPCMCOEFSET;
typedef ADPCMCOEFSET NEAR *NPADPCMCOEFSET;
typedef ADPCMCOEFSET FAR  *LPADPCMCOEFSET;

typedef struct adpcmwaveformat_tag {
	WAVEFORMATEX	wfx;
	WORD		wSamplesPerBlock;
	WORD		wNumCoef;
	ADPCMCOEFSET	aCoef[];
} ADPCMWAVEFORMAT;
typedef ADPCMWAVEFORMAT       *PADPCMWAVEFORMAT;
typedef ADPCMWAVEFORMAT NEAR *NPADPCMWAVEFORMAT;
typedef ADPCMWAVEFORMAT FAR  *LPADPCMWAVEFORMAT;




#endif  /* _INC_WAVEFF */