ref: 5f0d6417237a6895b39ef2a20f9fbbe6689f57fe
dir: /common/libsndfile/src/wav.c/
/*
** Copyright (C) 1999-2000 Erik de Castro Lopo <erikd@zip.com.au>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU Lesser General Public License as published by
** the Free Software Foundation; either version 2.1 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include "sndfile.h"
#include "config.h"
#include "sfendian.h"
#include "common.h"
#include "pcm.h"
#include "ulaw.h"
#include "alaw.h"
#include "wav.h"
/*------------------------------------------------------------------------------
** List of known WAV format tags
*/
enum
{
WAVE_FORMAT_UNKNOWN = 0x0000, /* Microsoft Corporation */
WAVE_FORMAT_PCM = 0x0001, /* Microsoft PCM format */
WAVE_FORMAT_MS_ADPCM = 0x0002, /* Microsoft ADPCM */
WAVE_FORMAT_IEEE_FLOAT = 0x0003, /* Micrososft 32 bit float format */
WAVE_FORMAT_IBM_CVSD = 0x0005, /* IBM Corporation */
WAVE_FORMAT_ALAW = 0x0006, /* Microsoft Corporation */
WAVE_FORMAT_MULAW = 0x0007, /* Microsoft Corporation */
WAVE_FORMAT_OKI_ADPCM = 0x0010, /* OKI */
WAVE_FORMAT_IMA_ADPCM = 0x0011, /* Intel Corporation */
WAVE_FORMAT_MEDIASPACE_ADPCM = 0x0012, /* Videologic */
WAVE_FORMAT_SIERRA_ADPCM = 0x0013, /* Sierra Semiconductor Corp */
WAVE_FORMAT_G723_ADPCM = 0x0014, /* Antex Electronics Corporation */
WAVE_FORMAT_DIGISTD = 0x0015, /* DSP Solutions, Inc. */
WAVE_FORMAT_DIGIFIX = 0x0016, /* DSP Solutions, Inc. */
WAVE_FORMAT_DIALOGIC_OKI_ADPCM = 0x0017, /* Dialogic Corporation */
WAVE_FORMAT_MEDIAVISION_ADPCM = 0x0018, /* Media Vision, Inc. */
WAVE_FORMAT_YAMAHA_ADPCM = 0x0020, /* Yamaha Corporation of America */
WAVE_FORMAT_SONARC = 0x0021, /* Speech Compression */
WAVE_FORMAT_DSPGROUP_TRUESPEECH = 0x0022, /* DSP Group, Inc */
WAVE_FORMAT_ECHOSC1 = 0x0023, /* Echo Speech Corporation */
WAVE_FORMAT_AUDIOFILE_AF18 = 0x0024, /* Audiofile, Inc. */
WAVE_FORMAT_APTX = 0x0025, /* Audio Processing Technology */
WAVE_FORMAT_AUDIOFILE_AF10 = 0x0026, /* Audiofile, Inc. */
WAVE_FORMAT_DOLBY_AC2 = 0x0030, /* Dolby Laboratories */
WAVE_FORMAT_GSM610 = 0x0031, /* Microsoft Corporation */
WAVE_FORMAT_MSNAUDIO = 0x0032, /* Microsoft Corporation */
WAVE_FORMAT_ANTEX_ADPCME = 0x0033, /* Antex Electronics Corporation */
WAVE_FORMAT_CONTROL_RES_VQLPC = 0x0034, /* Control Resources Limited */
WAVE_FORMAT_DIGIREAL = 0x0035, /* DSP Solutions, Inc. */
WAVE_FORMAT_DIGIADPCM = 0x0036, /* DSP Solutions, Inc. */
WAVE_FORMAT_CONTROL_RES_CR10 = 0x0037, /* Control Resources Limited */
WAVE_FORMAT_NMS_VBXADPCM = 0x0038, /* Natural MicroSystems */
WAVE_FORMAT_ROCKWELL_ADPCM = 0x003B, /* Rockwell International */
WAVE_FORMAT_ROCKWELL_DIGITALK = 0x003C, /* Rockwell International */
WAVE_FORMAT_G721_ADPCM = 0x0040, /* Antex Electronics Corporation */
WAVE_FORMAT_MPEG = 0x0050, /* Microsoft Corporation */
WAVE_FORMAT_MPEGLAYER3 = 0x0055, /* MPEG 3 Layer 1 */
IBM_FORMAT_MULAW = 0x0101, /* IBM mu-law format */
IBM_FORMAT_ALAW = 0x0102, /* IBM a-law format */
IBM_FORMAT_ADPCM = 0x0103, /* IBM AVC Adaptive Differential PCM format */
WAVE_FORMAT_CREATIVE_ADPCM = 0x0200, /* Creative Labs, Inc */
WAVE_FORMAT_FM_TOWNS_SND = 0x0300, /* Fujitsu Corp. */
WAVE_FORMAT_OLIGSM = 0x1000, /* Ing C. Olivetti & C., S.p.A. */
WAVE_FORMAT_OLIADPCM = 0x1001, /* Ing C. Olivetti & C., S.p.A. */
WAVE_FORMAT_OLICELP = 0x1002, /* Ing C. Olivetti & C., S.p.A. */
WAVE_FORMAT_OLISBC = 0x1003, /* Ing C. Olivetti & C., S.p.A. */
WAVE_FORMAT_OLIOPR = 0x1004, /* Ing C. Olivetti & C., S.p.A. */
WAVE_FORMAT_EXTENSIBLE = 0xFFFE
} ;
/*------------------------------------------------------------------------------
* Macros to handle big/little endian issues.
*/
#if (CPU_IS_LITTLE_ENDIAN == 1)
# define MAKE_MARKER(a,b,c,d) ((a)|((b)<<8)|((c)<<16)|((d)<<24))
#elif (CPU_IS_BIG_ENDIAN == 1)
# define MAKE_MARKER(a,b,c,d) (((a)<<24)|((b)<<16)|((c)<<8)|(d))
#else
# error "Cannot determine endian-ness of processor."
#endif
#define RIFF_MARKER (MAKE_MARKER ('R', 'I', 'F', 'F'))
#define WAVE_MARKER (MAKE_MARKER ('W', 'A', 'V', 'E'))
#define fmt_MARKER (MAKE_MARKER ('f', 'm', 't', ' '))
#define data_MARKER (MAKE_MARKER ('d', 'a', 't', 'a'))
#define cue_MARKER (MAKE_MARKER ('c', 'u', 'e', ' '))
#define LIST_MARKER (MAKE_MARKER ('L', 'I', 'S', 'T'))
#define slnt_MARKER (MAKE_MARKER ('s', 'l', 'n', 't'))
#define wavl_MARKER (MAKE_MARKER ('w', 'a', 'v', 'l'))
#define INFO_MARKER (MAKE_MARKER ('I', 'N', 'F', 'O'))
#define plst_MARKER (MAKE_MARKER ('p', 'l', 's', 't'))
#define adtl_MARKER (MAKE_MARKER ('a', 'd', 't', 'l'))
#define labl_MARKER (MAKE_MARKER ('l', 'a', 'b', 'l'))
#define note_MARKER (MAKE_MARKER ('n', 'o', 't', 'e'))
#define fact_MARKER (MAKE_MARKER ('f', 'a', 'c', 't'))
#define smpl_MARKER (MAKE_MARKER ('s', 'm', 'p', 'l'))
#define bext_MARKER (MAKE_MARKER ('b', 'e', 'x', 't'))
#define MEXT_MARKER (MAKE_MARKER ('M', 'E', 'X', 'T'))
#define DISP_MARKER (MAKE_MARKER ('D', 'I', 'S', 'P'))
/*------------------------------------------------------------------------------
* Private static functions.
*/
static int read_fmt_chunk (SF_PRIVATE *psf, WAV_FMT *wav_fmt) ;
static int write_header (SF_PRIVATE *psf, WAV_FMT *wav_fmt, unsigned int size, int do_fact) ;
static const char* wav_format_str (int k) ;
static void le2h_wav_fmt (WAV_FMT *fmt) ;
static void h2le_wav_fmt (WAV_FMT *fmt) ;
/*------------------------------------------------------------------------------
* Public functions.
*/
int wav_open_read (SF_PRIVATE *psf)
{ WAV_FMT wav_fmt ;
FACT_CHUNK fact_chunk ;
unsigned int dword, marker, RIFFsize ;
int parsestage = 0, error, format = 0 ;
psf->sf.seekable = SF_TRUE ;
while (1)
{ fread (&marker, sizeof (marker), 1, psf->file) ;
switch (marker)
{ case RIFF_MARKER :
if (parsestage != 0)
return SFE_WAV_NO_RIFF ;
fread (&dword, sizeof (dword), 1, psf->file) ;
RIFFsize = LE2H_INT (dword) ;
if (psf->filelength < RIFFsize + 2 * sizeof (dword))
{ dword = psf->filelength - 2 * sizeof (dword);
psf_sprintf (psf, "RIFF : %d (should be %d)\n", RIFFsize, dword) ;
RIFFsize = dword ;
}
else
psf_sprintf (psf, "RIFF : %d\n", RIFFsize) ;
parsestage = 1 ;
break ;
case WAVE_MARKER :
if (parsestage != 1)
return SFE_WAV_NO_WAVE ;
psf_sprintf (psf, "WAVE\n") ;
parsestage = 2 ;
break ;
case fmt_MARKER :
if (parsestage != 2)
return SFE_WAV_NO_FMT ;
if ((error = read_fmt_chunk (psf, &wav_fmt)))
return error ;
format = wav_fmt.format ;
parsestage = 3 ;
break ;
case data_MARKER :
if (parsestage < 3)
return SFE_WAV_NO_DATA ;
fread (&dword, sizeof (dword), 1, psf->file) ;
psf->datalength = LE2H_INT (dword) ;
psf->dataoffset = ftell (psf->file) ;
if (psf->filelength < psf->dataoffset + psf->datalength)
{ psf_sprintf (psf, "data : %d (should be %d)\n", psf->datalength, psf->filelength - psf->dataoffset) ;
psf->datalength = psf->filelength - psf->dataoffset ;
}
else
psf_sprintf (psf, "data : %d\n", psf->datalength) ;
if (format == WAVE_FORMAT_MS_ADPCM && psf->datalength % 2)
{ psf->datalength ++ ;
psf_sprintf (psf, "*** Data length odd. Increasing it by 1.\n") ;
} ;
fseek (psf->file, psf->datalength, SEEK_CUR) ;
dword = ftell (psf->file) ;
if (dword != (off_t) (psf->dataoffset + psf->datalength))
psf_sprintf (psf, "*** fseek past end error ***\n", dword, psf->dataoffset + psf->datalength) ;
break ;
case fact_MARKER :
fread (&dword, sizeof (dword), 1, psf->file) ;
dword = LE2H_INT (dword) ;
fread (&fact_chunk, sizeof (fact_chunk), 1, psf->file) ;
if (dword > sizeof (fact_chunk))
fseek (psf->file, (int) (dword - sizeof (fact_chunk)), SEEK_CUR) ;
fact_chunk.samples = LE2H_INT (fact_chunk.samples) ;
psf_sprintf (psf, "%D : %d\n", marker, dword) ;
psf_sprintf (psf, " samples : %d\n", fact_chunk.samples) ;
break ;
case cue_MARKER :
case LIST_MARKER :
case INFO_MARKER :
case smpl_MARKER :
case bext_MARKER :
case MEXT_MARKER :
case DISP_MARKER :
fread (&dword, sizeof (dword), 1, psf->file) ;
dword = LE2H_INT (dword) ;
psf_sprintf (psf, "%D : %d\n", marker, dword) ;
fseek (psf->file, (int) dword, SEEK_CUR) ;
break ;
default :
if (isprint ((marker >> 24) & 0xFF) && isprint ((marker >> 16) & 0xFF)
&& isprint ((marker >> 8) & 0xFF) && isprint (marker & 0xFF))
{ fread (&dword, sizeof (dword), 1, psf->file) ;
psf_sprintf (psf, "%D : %d (unknown marker)\n", marker, dword) ;
fseek (psf->file, (int) dword, SEEK_CUR) ;
break ;
} ;
if ((dword = ftell (psf->file)) & 0x03)
{ psf_sprintf (psf, " Unknown chunk marker at position %d. Resynching.\n", dword - 4) ;
fseek (psf->file, -3, SEEK_CUR) ;
break ;
} ;
psf_sprintf (psf, "*** Unknown chunk marker : %X. Exiting parser.\n", marker) ;
break ;
} ; /* switch (dword) */
if (ferror (psf->file))
{ psf_sprintf (psf, "*** Error on file handle. ***\n", marker) ;
clearerr (psf->file) ;
break ;
} ;
if (ftell (psf->file) >= (int) (psf->filelength - (2 * sizeof (dword))))
break ;
} ; /* while (1) */
if (! psf->dataoffset)
return SFE_WAV_NO_DATA ;
psf->current = 0 ;
psf->endian = SF_ENDIAN_LITTLE ; /* All WAV files are little endian. */
psf->sf.sections = 1 ;
fseek (psf->file, psf->dataoffset, SEEK_SET) ;
psf->close = (func_close) wav_close ;
if (psf->blockwidth)
{ if (psf->filelength - psf->dataoffset < psf->datalength)
psf->sf.samples = (psf->filelength - psf->dataoffset) / psf->blockwidth ;
else
psf->sf.samples = psf->datalength / psf->blockwidth ;
} ;
switch (format)
{ case WAVE_FORMAT_PCM :
case WAVE_FORMAT_EXTENSIBLE :
break ;
case WAVE_FORMAT_MULAW :
psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_ULAW) ;
psf->read_short = (func_short) ulaw_read_ulaw2s ;
psf->read_int = (func_int) ulaw_read_ulaw2i ;
psf->read_double = (func_double) ulaw_read_ulaw2d ;
return 0 ;
case WAVE_FORMAT_ALAW :
psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_ALAW) ;
psf->read_short = (func_short) alaw_read_alaw2s ;
psf->read_int = (func_int) alaw_read_alaw2i ;
psf->read_double = (func_double) alaw_read_alaw2d ;
return 0 ;
case WAVE_FORMAT_MS_ADPCM :
psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM) ;
if ((error = msadpcm_reader_init (psf, &wav_fmt)))
return error ;
psf->read_short = (func_short) msadpcm_read_s ;
psf->read_int = (func_int) msadpcm_read_i ;
psf->read_double = (func_double) msadpcm_read_d ;
psf->seek_func = (func_seek) msadpcm_seek ;
return 0 ;
case WAVE_FORMAT_IMA_ADPCM :
psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM) ;
if ((error = wav_ima_reader_init (psf, &wav_fmt)))
return error ;
psf->read_short = (func_short) ima_read_s ;
psf->read_int = (func_int) ima_read_i ;
psf->read_double = (func_double) ima_read_d ;
psf->seek_func = (func_seek) ima_seek ;
return 0 ;
case WAVE_FORMAT_GSM610 :
psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_GSM610) ;
if ((error = wav_gsm610_reader_init (psf, &wav_fmt)))
return error ;
psf->read_short = (func_short) wav_gsm610_read_s ;
psf->read_int = (func_int) wav_gsm610_read_i ;
psf->read_double = (func_double) wav_gsm610_read_d ;
psf->seek_func = NULL ; /* Not seekable */
return 0 ;
case WAVE_FORMAT_IEEE_FLOAT :
psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_FLOAT) ;
if (CAN_READ_WRITE_x86_IEEE)
{ psf->read_short = (func_short) pcm_read_f2s ;
psf->read_int = (func_int) pcm_read_f2i ;
psf->read_double = (func_double) pcm_read_f2d ;
}
else
{ psf->read_short = (func_short) wav_read_x86f2s ;
psf->read_int = (func_int) wav_read_x86f2i ;
psf->read_double = (func_double) wav_read_x86f2d ;
} ;
return 0 ;
default : return SFE_UNIMPLEMENTED ;
} ;
psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_PCM) ;
switch (psf->bytewidth)
{ case 1 :
psf->read_short = (func_short) pcm_read_uc2s ;
psf->read_int = (func_int) pcm_read_uc2i ;
psf->read_double = (func_double) pcm_read_uc2d ;
break ;
case 2 :
psf->read_short = (func_short) pcm_read_les2s ;
psf->read_int = (func_int) pcm_read_les2i ;
psf->read_double = (func_double) pcm_read_les2d ;
break ;
case 3 :
psf->read_short = (func_short) pcm_read_let2s ;
psf->read_int = (func_int) pcm_read_let2i ;
psf->read_double = (func_double) pcm_read_let2d ;
break ;
case 4 :
psf->read_short = (func_short) pcm_read_lei2s ;
psf->read_int = (func_int) pcm_read_lei2i ;
psf->read_double = (func_double) pcm_read_lei2d ;
break ;
default : return SFE_UNIMPLEMENTED ;
} ;
return 0 ;
} /* wav_open_read */
/*------------------------------------------------------------------------------
*/
int wav_open_write (SF_PRIVATE *psf)
{ WAV_FMT wav_fmt ;
unsigned int dword, subformat ;
int error ;
if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_WAV)
return SFE_BAD_OPEN_FORMAT ;
psf->endian = SF_ENDIAN_LITTLE ; /* All WAV files are little endian. */
psf->sf.seekable = SF_TRUE ;
psf->error = 0 ;
subformat = psf->sf.format & SF_FORMAT_SUBMASK ;
if (subformat == SF_FORMAT_ULAW || subformat == SF_FORMAT_ALAW)
psf->bytewidth = 1 ;
else
psf->bytewidth = BITWIDTH2BYTES (psf->sf.pcmbitwidth) ;
psf->blockwidth = psf->bytewidth * psf->sf.channels ;
wav_fmt.min.channels = psf->sf.channels ;
wav_fmt.min.samplerate = psf->sf.samplerate ;
wav_fmt.min.bytespersec = psf->sf.samplerate * psf->bytewidth * psf->sf.channels ;
wav_fmt.min.blockalign = psf->bytewidth * psf->sf.channels ;
wav_fmt.min.bitwidth = psf->sf.pcmbitwidth ;
switch (psf->sf.format & SF_FORMAT_SUBMASK)
{ case SF_FORMAT_PCM :
wav_fmt.format = WAVE_FORMAT_PCM ;
psf->dataoffset = 7 * sizeof (dword) + sizeof (MIN_WAV_FMT) ;
psf->datalength = psf->blockwidth * psf->sf.samples ;
psf->filelength = psf->datalength + psf->dataoffset ;
write_header (psf, &wav_fmt, sizeof (MIN_WAV_FMT), 0) ;
break ;
case SF_FORMAT_FLOAT :
wav_fmt.format = WAVE_FORMAT_IEEE_FLOAT ;
psf->dataoffset = 9 * sizeof (dword) + sizeof (MIN_WAV_FMT) + sizeof (FACT_CHUNK) ;
psf->datalength = psf->blockwidth * psf->sf.samples ;
psf->filelength = psf->datalength + psf->dataoffset ;
write_header (psf, &wav_fmt, sizeof (MIN_WAV_FMT), 1) ;
break ;
case SF_FORMAT_ULAW :
wav_fmt.format = WAVE_FORMAT_MULAW ;
wav_fmt.size20.bitwidth = 8 ;
wav_fmt.size20.extrabytes = 2 ;
wav_fmt.size20.dummy = 0 ;
psf->dataoffset = 9 * sizeof (dword) + sizeof (WAV_FMT_SIZE20) + sizeof (FACT_CHUNK) ;
psf->datalength = psf->blockwidth * psf->sf.samples ;
psf->filelength = psf->datalength + psf->dataoffset ;
write_header (psf, &wav_fmt, sizeof (WAV_FMT_SIZE20), 1) ;
break ;
case SF_FORMAT_ALAW :
wav_fmt.format = WAVE_FORMAT_ALAW ;
wav_fmt.size20.bitwidth = 8 ;
wav_fmt.size20.extrabytes = 2 ;
wav_fmt.size20.dummy = 0 ;
psf->dataoffset = 9 * sizeof (dword) + sizeof (WAV_FMT_SIZE20) + sizeof (FACT_CHUNK) ;
psf->datalength = psf->blockwidth * psf->sf.samples ;
psf->filelength = psf->datalength + psf->dataoffset ;
write_header (psf, &wav_fmt, sizeof (WAV_FMT_SIZE20), 1) ;
break ;
case SF_FORMAT_IMA_ADPCM :
wav_fmt.format = WAVE_FORMAT_IMA_ADPCM ;
if ((error = wav_ima_writer_init (psf, &wav_fmt)))
return error ;
psf->dataoffset = 9 * sizeof (dword) + sizeof (IMA_ADPCM_WAV_FMT) + sizeof (FACT_CHUNK) ;
if (psf->sf.samples % wav_fmt.ima.samplesperblock)
psf->datalength = ((psf->sf.samples / wav_fmt.ima.samplesperblock) + 1) * wav_fmt.ima.samplesperblock ;
else
psf->datalength = psf->sf.samples ;
psf->filelength = psf->datalength + psf->dataoffset ;
write_header (psf, &wav_fmt, sizeof (IMA_ADPCM_WAV_FMT), 1) ;
break ;
case SF_FORMAT_MS_ADPCM :
wav_fmt.format = WAVE_FORMAT_MS_ADPCM ;
msadpcm_writer_init (psf, &wav_fmt) ;
psf->dataoffset = 9 * sizeof (dword) + sizeof (MS_ADPCM_WAV_FMT) + sizeof (FACT_CHUNK) ;
if (psf->sf.samples % wav_fmt.msadpcm.samplesperblock)
psf->datalength = ((psf->sf.samples / wav_fmt.msadpcm.samplesperblock) + 1) * wav_fmt.msadpcm.samplesperblock ;
else
psf->datalength = psf->sf.samples ;
psf->filelength = psf->datalength + psf->dataoffset ;
write_header (psf, &wav_fmt, sizeof (MS_ADPCM_WAV_FMT), 1) ;
break ;
case SF_FORMAT_GSM610 :
wav_fmt.format = WAVE_FORMAT_GSM610 ;
wav_gsm610_writer_init (psf, &wav_fmt) ;
psf->dataoffset = 9 * sizeof (dword) + sizeof (GSM610_WAV_FMT) + sizeof (FACT_CHUNK) ;
if (psf->sf.samples % wav_fmt.gsm610.samplesperblock)
psf->datalength = ((psf->sf.samples / wav_fmt.gsm610.samplesperblock) + 1) * wav_fmt.gsm610.samplesperblock ;
else
psf->datalength = psf->sf.samples ;
psf->filelength = psf->datalength + psf->dataoffset ;
write_header (psf, &wav_fmt, sizeof (GSM610_WAV_FMT), 1) ;
break ;
default : return SFE_UNIMPLEMENTED ;
} ;
dword = data_MARKER ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
dword = H2LE_INT (psf->datalength) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
psf->close = (func_close) wav_close ;
if ((psf->sf.format & SF_FORMAT_SUBMASK) == SF_FORMAT_FLOAT)
{ psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_FLOAT) ;
if (CAN_READ_WRITE_x86_IEEE)
{ psf->write_short = (func_short) pcm_write_s2f ;
psf->write_int = (func_int) pcm_write_i2f ;
psf->write_double = (func_double) pcm_write_d2f ;
}
else
{ psf->write_short = (func_short) wav_write_s2x86f ;
psf->write_int = (func_int) wav_write_i2x86f ;
psf->write_double = (func_double) wav_write_d2x86f ;
} ;
return 0 ;
} ;
if ((psf->sf.format & SF_FORMAT_SUBMASK) == SF_FORMAT_IMA_ADPCM)
{ psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM) ;
psf->write_short = (func_short) ima_write_s ;
psf->write_int = (func_int) ima_write_i ;
psf->write_double = (func_double) ima_write_d ;
psf->seek_func = (func_seek) ima_seek ;
psf->close = (func_close) wav_ima_close ;
return 0 ;
} ;
if ((psf->sf.format & SF_FORMAT_SUBMASK) == SF_FORMAT_MS_ADPCM)
{ psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM) ;
psf->write_short = (func_short) msadpcm_write_s ;
psf->write_int = (func_int) msadpcm_write_i ;
psf->write_double = (func_double) msadpcm_write_d ;
psf->seek_func = (func_seek) msadpcm_seek ;
psf->close = (func_close) msadpcm_close ;
return 0 ;
} ;
if ((psf->sf.format & SF_FORMAT_SUBMASK) == SF_FORMAT_GSM610)
{ psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_GSM610) ;
psf->write_short = (func_short) wav_gsm610_write_s ;
psf->write_int = (func_int) wav_gsm610_write_i ;
psf->write_double = (func_double) wav_gsm610_write_d ;
psf->seek_func = NULL ; /* Not seekable */
psf->close = (func_close) wav_gsm610_close ;
return 0 ;
} ;
if ((psf->sf.format & SF_FORMAT_SUBMASK) == SF_FORMAT_ULAW)
{ psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_ULAW) ;
psf->write_short = (func_short) ulaw_write_s2ulaw ;
psf->write_int = (func_int) ulaw_write_i2ulaw ;
psf->write_double = (func_double) ulaw_write_d2ulaw ;
return 0 ;
} ;
if ((psf->sf.format & SF_FORMAT_SUBMASK) == SF_FORMAT_ALAW)
{ psf->sf.format = (SF_FORMAT_WAV | SF_FORMAT_ALAW) ;
psf->write_short = (func_short) alaw_write_s2alaw ;
psf->write_int = (func_int) alaw_write_i2alaw ;
psf->write_double = (func_double) alaw_write_d2alaw ;
return 0 ;
} ;
if ((psf->sf.format & SF_FORMAT_SUBMASK) != SF_FORMAT_PCM)
return SFE_UNIMPLEMENTED ;
switch (psf->bytewidth)
{ case 1 :
psf->write_short = (func_short) pcm_write_s2uc ;
psf->write_int = (func_int) pcm_write_i2uc ;
psf->write_double = (func_double) pcm_write_d2uc ;
break ;
case 2 :
psf->write_short = (func_short) pcm_write_s2les ;
psf->write_int = (func_int) pcm_write_i2les ;
psf->write_double = (func_double) pcm_write_d2les ;
break ;
case 3 :
psf->write_short = (func_short) pcm_write_s2let ;
psf->write_int = (func_int) pcm_write_i2let ;
psf->write_double = (func_double) pcm_write_d2let ;
break ;
case 4 :
psf->write_short = (func_short) pcm_write_s2lei ;
psf->write_int = (func_int) pcm_write_i2lei ;
psf->write_double = (func_double) pcm_write_d2lei ;
break ;
default : return SFE_UNIMPLEMENTED ;
} ;
return 0 ;
} /* wav_open_write */
/*------------------------------------------------------------------------------
*/
int wav_close (SF_PRIVATE *psf)
{ unsigned int dword ;
if (psf->mode == SF_MODE_WRITE)
{ /* Now we know for certain the length of the file we can
* re-write correct values for the RIFF and data chunks.
*/
fseek (psf->file, 0, SEEK_END) ;
psf->filelength = ftell (psf->file) ;
/* Fix RIFF size. */
dword = H2LE_INT (psf->filelength - 2 * sizeof (dword)) ;
fseek (psf->file, sizeof (dword), SEEK_SET) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
psf->datalength = psf->filelength - psf->dataoffset ;
psf->sf.samples = psf->datalength / (psf->sf.channels * psf->bytewidth) ;
fseek (psf->file, (int) (psf->dataoffset - sizeof (dword)), SEEK_SET) ;
dword = H2LE_INT (psf->datalength) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
} ;
if (psf->fdata)
free (psf->fdata) ;
psf->fdata = NULL ;
return 0 ;
} /* wav_close */
/*=========================================================================
* Private functions.
*/
static
int read_fmt_chunk (SF_PRIVATE *psf, WAV_FMT *wav_fmt)
{ unsigned int dword, bytesread, k, structsize, bytespersec = 0 ;
memset (wav_fmt, 0, sizeof (WAV_FMT)) ;
bytesread = 0 ;
fread (&dword, sizeof (dword), 1, psf->file) ;
structsize = LE2H_INT (dword) ;
psf_sprintf (psf, "fmt : %d\n", structsize) ;
if (structsize < 16)
return SFE_WAV_FMT_SHORT ;
if (structsize > sizeof (WAV_FMT))
return SFE_WAV_FMT_TOO_BIG ;
fread (wav_fmt, structsize, 1, psf->file) ;
bytesread += structsize ;
if (CPU_IS_BIG_ENDIAN)
le2h_wav_fmt (wav_fmt) ;
psf_sprintf (psf, " Format : 0x%X => %s\n", wav_fmt->format, wav_format_str (wav_fmt->format)) ;
psf_sprintf (psf, " Channels : %d\n", wav_fmt->min.channels) ;
psf_sprintf (psf, " Sample Rate : %d\n", wav_fmt->min.samplerate) ;
psf_sprintf (psf, " Block Align : %d\n", wav_fmt->min.blockalign) ;
psf_sprintf (psf, " Bit Width : %d\n", wav_fmt->min.bitwidth) ;
psf->sf.samplerate = wav_fmt->min.samplerate ;
psf->sf.samples = 0 ; /* Correct this when reading data chunk. */
psf->sf.channels = wav_fmt->min.channels ;
switch (wav_fmt->format)
{ case WAVE_FORMAT_PCM :
case WAVE_FORMAT_IEEE_FLOAT :
bytespersec = wav_fmt->min.samplerate * wav_fmt->min.blockalign ;
if (wav_fmt->min.bytespersec != bytespersec)
psf_sprintf (psf, " Bytes/sec : %d (should be %d)\n", wav_fmt->min.bytespersec, bytespersec) ;
else
psf_sprintf (psf, " Bytes/sec : %d\n", wav_fmt->min.bytespersec) ;
psf->sf.pcmbitwidth = wav_fmt->min.bitwidth ;
psf->bytewidth = BITWIDTH2BYTES (wav_fmt->min.bitwidth) ;
break ;
case WAVE_FORMAT_ALAW :
case WAVE_FORMAT_MULAW :
if (wav_fmt->min.bytespersec / wav_fmt->min.blockalign != wav_fmt->min.samplerate)
psf_sprintf (psf, " Bytes/sec : %d (should be %d)\n", wav_fmt->min.bytespersec, wav_fmt->min.samplerate * wav_fmt->min.blockalign) ;
else
psf_sprintf (psf, " Bytes/sec : %d\n", wav_fmt->min.bytespersec) ;
psf->sf.pcmbitwidth = 16 ;
psf->bytewidth = 1 ;
if (structsize >= 18)
psf_sprintf (psf, " Extra Bytes : %d\n", wav_fmt->size20.extrabytes) ;
break ;
case WAVE_FORMAT_MS_ADPCM :
if (wav_fmt->msadpcm.bitwidth != 4)
return SFE_WAV_ADPCM_NOT4BIT ;
if (wav_fmt->msadpcm.channels < 1 || wav_fmt->msadpcm.channels > 2)
return SFE_WAV_ADPCM_CHANNELS ;
bytespersec = (wav_fmt->msadpcm.samplerate * wav_fmt->msadpcm.blockalign) / wav_fmt->msadpcm.samplesperblock ;
if (wav_fmt->min.bytespersec == bytespersec)
psf_sprintf (psf, " Bytes/sec : %d\n", wav_fmt->min.bytespersec) ;
else if (wav_fmt->min.bytespersec == (wav_fmt->msadpcm.samplerate / wav_fmt->msadpcm.samplesperblock) * wav_fmt->msadpcm.blockalign)
psf_sprintf (psf, " Bytes/sec : %d (should be %d (MS BUG!))\n", wav_fmt->min.bytespersec, bytespersec) ;
else
psf_sprintf (psf, " Bytes/sec : %d (should be %d)\n", wav_fmt->min.bytespersec, bytespersec) ;
psf->sf.pcmbitwidth = 16 ;
psf->bytewidth = 2 ;
psf_sprintf (psf, " Extra Bytes : %d\n", wav_fmt->msadpcm.extrabytes) ;
psf_sprintf (psf, " Samples/Block : %d\n", wav_fmt->msadpcm.samplesperblock) ;
if (wav_fmt->msadpcm.numcoeffs > sizeof (MS_ADPCM_WAV_FMT) / sizeof (int))
{ psf_sprintf (psf, " No. of Coeffs : %d ****\n", wav_fmt->msadpcm.numcoeffs) ;
wav_fmt->msadpcm.numcoeffs = sizeof (MS_ADPCM_WAV_FMT) / sizeof (int) ;
}
else
psf_sprintf (psf, " No. of Coeffs : %d\n", wav_fmt->msadpcm.numcoeffs) ;
psf_sprintf (psf, " Coeff 1 : ") ;
for (k = 0 ; k < wav_fmt->msadpcm.numcoeffs ; k++)
psf_sprintf (psf, "%d ", wav_fmt->msadpcm.coeffs [k].coeff1) ;
psf_sprintf (psf, "\n Coeff 2 : ") ;
for (k = 0 ; k < wav_fmt->msadpcm.numcoeffs ; k++)
psf_sprintf (psf, "%d ", wav_fmt->msadpcm.coeffs [k].coeff2) ;
psf_sprintf (psf, "\n") ;
break ;
case WAVE_FORMAT_IMA_ADPCM :
if (wav_fmt->ima.bitwidth != 4)
return SFE_WAV_ADPCM_NOT4BIT ;
if (wav_fmt->ima.channels < 1 || wav_fmt->ima.channels > 2)
return SFE_WAV_ADPCM_CHANNELS ;
bytespersec = (wav_fmt->ima.samplerate * wav_fmt->ima.blockalign) / wav_fmt->ima.samplesperblock ;
if (wav_fmt->ima.bytespersec != bytespersec)
psf_sprintf (psf, " Bytes/sec : %d (should be %d)\n", wav_fmt->ima.bytespersec, bytespersec) ;
else
psf_sprintf (psf, " Bytes/sec : %d\n", wav_fmt->ima.bytespersec) ;
psf->sf.pcmbitwidth = 16 ;
psf->bytewidth = 2 ;
psf_sprintf (psf, " Extra Bytes : %d\n", wav_fmt->ima.extrabytes) ;
psf_sprintf (psf, " Samples/Block : %d\n", wav_fmt->ima.samplesperblock) ;
break ;
case WAVE_FORMAT_EXTENSIBLE :
if (wav_fmt->ext.bytespersec / wav_fmt->ext.blockalign != wav_fmt->ext.samplerate)
psf_sprintf (psf, " Bytes/sec : %d (should be %d)\n", wav_fmt->ext.bytespersec, wav_fmt->ext.samplerate * wav_fmt->ext.blockalign) ;
else
psf_sprintf (psf, " Bytes/sec : %d\n", wav_fmt->ext.bytespersec) ;
psf_sprintf (psf, " Valid Bits : %d\n", wav_fmt->ext.validbits) ;
psf_sprintf (psf, " Channel Mask : 0x%X\n", wav_fmt->ext.channelmask) ;
psf_sprintf (psf, " Subformat\n") ;
psf_sprintf (psf, " esf_field1 : 0x%X\n", wav_fmt->ext.esf.esf_field1) ;
psf_sprintf (psf, " esf_field2 : 0x%X\n", wav_fmt->ext.esf.esf_field2) ;
psf_sprintf (psf, " esf_field3 : 0x%X\n", wav_fmt->ext.esf.esf_field3) ;
psf_sprintf (psf, " esf_field4 : ") ;
for (k = 0 ; k < 8 ; k++)
psf_sprintf (psf, "0x%X ", wav_fmt->ext.esf.esf_field4 [k] & 0xFF) ;
psf_sprintf (psf, "\n") ;
psf->sf.pcmbitwidth = wav_fmt->ext.bitwidth ;
psf->bytewidth = BITWIDTH2BYTES (wav_fmt->ext.bitwidth) ;
break ;
case WAVE_FORMAT_GSM610 :
if (wav_fmt->gsm610.channels != 1 || wav_fmt->gsm610.blockalign != 65)
return SFE_WAV_GSM610_FORMAT ;
if (wav_fmt->gsm610.samplesperblock != 320)
return SFE_WAV_GSM610_FORMAT ;
bytespersec = (wav_fmt->gsm610.samplerate * wav_fmt->gsm610.blockalign) / wav_fmt->gsm610.samplesperblock ;
if (wav_fmt->gsm610.bytespersec != bytespersec)
psf_sprintf (psf, " Bytes/sec : %d (should be %d)\n", wav_fmt->gsm610.bytespersec, bytespersec) ;
else
psf_sprintf (psf, " Bytes/sec : %d\n", wav_fmt->gsm610.bytespersec) ;
psf->sf.pcmbitwidth = 16 ;
psf->bytewidth = 2 ;
psf_sprintf (psf, " Extra Bytes : %d\n", wav_fmt->gsm610.extrabytes) ;
psf_sprintf (psf, " Samples/Block : %d\n", wav_fmt->gsm610.samplesperblock) ;
break ;
default : break ;
} ;
psf->blockwidth = wav_fmt->min.channels * psf->bytewidth ;
return 0 ;
} /* read_fmt_chunk */
static
int write_header (SF_PRIVATE *psf, WAV_FMT *wav_fmt, unsigned int size, int do_fact)
{ FACT_CHUNK fact_chunk ;
unsigned int dword, RIFFsize ;
RIFFsize = psf->filelength - 2 * sizeof (dword) ;
dword = RIFF_MARKER ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
dword = H2LE_INT (RIFFsize) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
dword = WAVE_MARKER ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
dword = fmt_MARKER ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
dword = H2LE_INT (size) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
if (CPU_IS_BIG_ENDIAN)
h2le_wav_fmt (wav_fmt) ;
fwrite (wav_fmt, size, 1, psf->file) ;
if (do_fact)
{ dword = fact_MARKER ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
dword = H2LE_INT (sizeof (FACT_CHUNK)) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
fact_chunk.samples = H2LE_INT (psf->sf.samples) ;
fwrite (&fact_chunk, sizeof (fact_chunk), 1, psf->file) ;
} ;
return 0 ;
} /* write_header */
static
void le2h_wav_fmt (WAV_FMT *fmt)
{ int k ;
fmt->min.format = ENDSWAP_SHORT (fmt->min.format) ;
fmt->min.channels = ENDSWAP_SHORT (fmt->min.channels) ;
fmt->min.samplerate = ENDSWAP_INT (fmt->min.samplerate) ;
fmt->min.bytespersec = ENDSWAP_INT (fmt->min.bytespersec) ;
fmt->min.blockalign = ENDSWAP_SHORT (fmt->min.blockalign) ;
fmt->min.bitwidth = ENDSWAP_SHORT (fmt->min.bitwidth) ;
switch (fmt->format)
{ case WAVE_FORMAT_MS_ADPCM :
fmt->msadpcm.extrabytes = ENDSWAP_SHORT (fmt->msadpcm.extrabytes) ;
fmt->msadpcm.samplesperblock = ENDSWAP_SHORT (fmt->msadpcm.samplesperblock) ;
fmt->msadpcm.numcoeffs = ENDSWAP_SHORT (fmt->msadpcm.numcoeffs) ;
for (k = 0 ; k < fmt->msadpcm.numcoeffs ; k++)
{ fmt->msadpcm.coeffs [k].coeff1 = ENDSWAP_SHORT (fmt->msadpcm.coeffs [k].coeff1) ;
fmt->msadpcm.coeffs [k].coeff2 = ENDSWAP_SHORT (fmt->msadpcm.coeffs [k].coeff2) ;
} ;
break ;
case WAVE_FORMAT_IMA_ADPCM :
fmt->ima.extrabytes = ENDSWAP_SHORT (fmt->ima.extrabytes) ;
fmt->ima.samplesperblock = ENDSWAP_SHORT (fmt->ima.samplesperblock) ;
break ;
case WAVE_FORMAT_ALAW :
case WAVE_FORMAT_MULAW :
fmt->size20.extrabytes = ENDSWAP_SHORT (fmt->size20.extrabytes) ;
fmt->size20.dummy = ENDSWAP_SHORT (fmt->size20.dummy) ;
break ;
case WAVE_FORMAT_GSM610 :
fmt->gsm610.extrabytes = ENDSWAP_SHORT (fmt->gsm610.extrabytes) ;
fmt->gsm610.samplesperblock = ENDSWAP_SHORT (fmt->gsm610.samplesperblock) ;
break ;
default : break ;
} ;
} /* le2h_wav_fmt */
static
void h2le_wav_fmt (WAV_FMT *fmt)
{ int k ;
switch (fmt->format)
{ case WAVE_FORMAT_MS_ADPCM :
for (k = 0 ; k < fmt->msadpcm.numcoeffs ; k++)
{ fmt->msadpcm.coeffs [k].coeff1 = ENDSWAP_SHORT (fmt->msadpcm.coeffs [k].coeff1) ;
fmt->msadpcm.coeffs [k].coeff2 = ENDSWAP_SHORT (fmt->msadpcm.coeffs [k].coeff2) ;
} ;
fmt->msadpcm.numcoeffs = ENDSWAP_SHORT (fmt->msadpcm.numcoeffs) ;
fmt->msadpcm.extrabytes = ENDSWAP_SHORT (fmt->msadpcm.extrabytes) ;
fmt->msadpcm.samplesperblock = ENDSWAP_SHORT (fmt->msadpcm.samplesperblock) ;
break ;
case WAVE_FORMAT_IMA_ADPCM :
fmt->ima.extrabytes = ENDSWAP_SHORT (fmt->ima.extrabytes) ;
fmt->ima.samplesperblock = ENDSWAP_SHORT (fmt->ima.samplesperblock) ;
break ;
case WAVE_FORMAT_ALAW :
case WAVE_FORMAT_MULAW :
fmt->size20.extrabytes = ENDSWAP_SHORT (fmt->size20.extrabytes) ;
fmt->size20.dummy = ENDSWAP_SHORT (fmt->size20.dummy) ;
break ;
case WAVE_FORMAT_GSM610 :
fmt->gsm610.extrabytes = ENDSWAP_SHORT (fmt->gsm610.extrabytes) ;
fmt->gsm610.samplesperblock = ENDSWAP_SHORT (fmt->gsm610.samplesperblock) ;
break ;
default : break ;
} ;
fmt->min.format = ENDSWAP_SHORT (fmt->min.format) ;
fmt->min.channels = ENDSWAP_SHORT (fmt->min.channels) ;
fmt->min.samplerate = ENDSWAP_INT (fmt->min.samplerate) ;
fmt->min.bytespersec = ENDSWAP_INT (fmt->min.bytespersec) ;
fmt->min.blockalign = ENDSWAP_SHORT (fmt->min.blockalign) ;
fmt->min.bitwidth = ENDSWAP_SHORT (fmt->min.bitwidth) ;
} /* h2le_wav_fmt */
static
const char* wav_format_str (int k)
{ switch (k)
{ case WAVE_FORMAT_UNKNOWN :
return "WAVE_FORMAT_UNKNOWN" ;
case WAVE_FORMAT_PCM :
return "WAVE_FORMAT_PCM " ;
case WAVE_FORMAT_MS_ADPCM :
return "WAVE_FORMAT_MS_ADPCM" ;
case WAVE_FORMAT_IEEE_FLOAT :
return "WAVE_FORMAT_IEEE_FLOAT" ;
case WAVE_FORMAT_IBM_CVSD :
return "WAVE_FORMAT_IBM_CVSD" ;
case WAVE_FORMAT_ALAW :
return "WAVE_FORMAT_ALAW" ;
case WAVE_FORMAT_MULAW :
return "WAVE_FORMAT_MULAW" ;
case WAVE_FORMAT_OKI_ADPCM :
return "WAVE_FORMAT_OKI_ADPCM" ;
case WAVE_FORMAT_IMA_ADPCM :
return "WAVE_FORMAT_IMA_ADPCM" ;
case WAVE_FORMAT_MEDIASPACE_ADPCM :
return "WAVE_FORMAT_MEDIASPACE_ADPCM" ;
case WAVE_FORMAT_SIERRA_ADPCM :
return "WAVE_FORMAT_SIERRA_ADPCM" ;
case WAVE_FORMAT_G723_ADPCM :
return "WAVE_FORMAT_G723_ADPCM" ;
case WAVE_FORMAT_DIGISTD :
return "WAVE_FORMAT_DIGISTD" ;
case WAVE_FORMAT_DIGIFIX :
return "WAVE_FORMAT_DIGIFIX" ;
case WAVE_FORMAT_DIALOGIC_OKI_ADPCM :
return "WAVE_FORMAT_DIALOGIC_OKI_ADPCM" ;
case WAVE_FORMAT_MEDIAVISION_ADPCM :
return "WAVE_FORMAT_MEDIAVISION_ADPCM" ;
case WAVE_FORMAT_YAMAHA_ADPCM :
return "WAVE_FORMAT_YAMAHA_ADPCM" ;
case WAVE_FORMAT_SONARC :
return "WAVE_FORMAT_SONARC" ;
case WAVE_FORMAT_DSPGROUP_TRUESPEECH :
return "WAVE_FORMAT_DSPGROUP_TRUESPEECH " ;
case WAVE_FORMAT_ECHOSC1 :
return "WAVE_FORMAT_ECHOSC1" ;
case WAVE_FORMAT_AUDIOFILE_AF18 :
return "WAVE_FORMAT_AUDIOFILE_AF18 " ;
case WAVE_FORMAT_APTX :
return "WAVE_FORMAT_APTX" ;
case WAVE_FORMAT_AUDIOFILE_AF10 :
return "WAVE_FORMAT_AUDIOFILE_AF10 " ;
case WAVE_FORMAT_DOLBY_AC2 :
return "WAVE_FORMAT_DOLBY_AC2" ;
case WAVE_FORMAT_GSM610 :
return "WAVE_FORMAT_GSM610" ;
case WAVE_FORMAT_MSNAUDIO :
return "WAVE_FORMAT_MSNAUDIO" ;
case WAVE_FORMAT_ANTEX_ADPCME :
return "WAVE_FORMAT_ANTEX_ADPCME" ;
case WAVE_FORMAT_CONTROL_RES_VQLPC :
return "WAVE_FORMAT_CONTROL_RES_VQLPC" ;
case WAVE_FORMAT_DIGIREAL :
return "WAVE_FORMAT_DIGIREAL" ;
case WAVE_FORMAT_DIGIADPCM :
return "WAVE_FORMAT_DIGIADPCM" ;
case WAVE_FORMAT_CONTROL_RES_CR10 :
return "WAVE_FORMAT_CONTROL_RES_CR10" ;
case WAVE_FORMAT_NMS_VBXADPCM :
return "WAVE_FORMAT_NMS_VBXADPCM" ;
case WAVE_FORMAT_ROCKWELL_ADPCM :
return "WAVE_FORMAT_ROCKWELL_ADPCM" ;
case WAVE_FORMAT_ROCKWELL_DIGITALK :
return "WAVE_FORMAT_ROCKWELL_DIGITALK" ;
case WAVE_FORMAT_G721_ADPCM :
return "WAVE_FORMAT_G721_ADPCM" ;
case WAVE_FORMAT_MPEG :
return "WAVE_FORMAT_MPEG" ;
case WAVE_FORMAT_MPEGLAYER3 :
return "WAVE_FORMAT_MPEGLAYER3" ;
case IBM_FORMAT_MULAW :
return "IBM_FORMAT_MULAW" ;
case IBM_FORMAT_ALAW :
return "IBM_FORMAT_ALAW" ;
case IBM_FORMAT_ADPCM :
return "IBM_FORMAT_ADPCM" ;
case WAVE_FORMAT_CREATIVE_ADPCM :
return "WAVE_FORMAT_CREATIVE_ADPCM" ;
case WAVE_FORMAT_FM_TOWNS_SND :
return "WAVE_FORMAT_FM_TOWNS_SND" ;
case WAVE_FORMAT_OLIGSM :
return "WAVE_FORMAT_OLIGSM" ;
case WAVE_FORMAT_OLIADPCM :
return "WAVE_FORMAT_OLIADPCM" ;
case WAVE_FORMAT_OLICELP :
return "WAVE_FORMAT_OLICELP" ;
case WAVE_FORMAT_OLISBC :
return "WAVE_FORMAT_OLISBC" ;
case WAVE_FORMAT_OLIOPR :
return "WAVE_FORMAT_OLIOPR" ;
case WAVE_FORMAT_EXTENSIBLE :
return "WAVE_FORMAT_EXTENSIBLE" ;
break ;
} ;
return "Unknown format" ;
} /* wav_format_str */