/* wavFormat.h - WAV audio file format */

/*
 * Copyright (c) 2000, 2010 Wind River Systems, Inc.
 *
 * The right to copy, distribute, modify, or otherwise make use
 * of this software may be licensed only pursuant to the terms
 * of an applicable Wind River license agreement.
 */

/*
Modification history
--------------------
01b,13jan10,ghs  vxWorks 6.9 LP64 adapting
01a,14jan00,rcb  First.
*/

#ifndef __INCwavFormath
#define __INCwavFormath

#ifdef  __cplusplus
extern "C" {
#endif


/* RIFF file header */

#define RIFF_HDR_SIG                "RIFF"
#define RIFF_HDR_SIG_LEN            4

typedef struct riff_hdr
    {
    char signature [4];             /* identifier string = "RIFF" */
    UINT32 length;                  /* remaining length after this header */
    } RIFF_HDR, *pRIFF_HDR;


/* RIFF .wav file signature */

#define RIFF_WAV_DATA_SIG           "WAVE"
#define RIFF_WAV_DATA_SIG_LEN       4


/* RIFF chunk header */

#define RIFF_CHUNK_ID_LEN           4

typedef struct riff_chunk_hdr
    {
    char chunkId [RIFF_CHUNK_ID_LEN]; /* ID of chunk */
    UINT32 length;                    /* remaining length after header */
    } RIFF_CHUNK_HDR, *pRIFF_CHUNK_HDR;


/* .wav format chunk */

#define RIFF_WAV_FMT_CHUNK_ID       "fmt "

typedef struct wav_format_chunk
    {
    UINT16 formatTag;               /* format category */
    UINT16 channels;                /* number of channels */
    UINT32 samplesPerSec;           /* sampling rate */
    UINT32 avgBytesPerSec;          /* used to estminate bfr requirements */
    UINT16 blockAlign;              /* data block size */
    union
        {
        struct                          /* MS PCM-specific data */
            {
            UINT16 bitsPerSample;   /* sample size */
            } msPcm;
        } fmt;
    } WAV_FORMAT_CHUNK, *pWAV_FORMAT_CHUNK;


/* .wav format categories */

#define WAV_FMT_MS_PCM      0x0001  /* Microsoft PCM */
#define WAV_FMT_IBM_MULAW   0x0101  /* IBM mul-law */
#define WAV_FMT_IBM_ALAW    0x0102  /* IBM a-law */
#define WAV_FMT_IBM_ADPCM   0x0103  /* IBM AVC ADPCM */


/* data chunk */

#define RIFF_WAV_DATA_CHUNK_SIG "data"


#ifdef  __cplusplus
}
#endif

#endif  /* __INCwavFormath */


/* End of file. */