ref: 5f0d6417237a6895b39ef2a20f9fbbe6689f57fe
dir: /common/libsndfile/src/wav_gsm610.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 <math.h>
#include "sndfile.h"
#include "config.h"
#include "sfendian.h"
#include "common.h"
#include "wav.h"
#include "GSM610/gsm.h"
#define GSM610_BLOCKSIZE 65
#define GSM610_SAMPLES 320
typedef struct
{ unsigned int blocks ;
int blockcount, samplecount ;
unsigned char block [GSM610_BLOCKSIZE] ;
short samples [GSM610_SAMPLES] ;
gsm gsm_data ;
} GSM610_PRIVATE ;
static int wav_gsm610_read_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610) ;
static int wav_gsm610_read (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610, short *ptr, int len) ;
static int wav_gsm610_write_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610) ;
static int wav_gsm610_write (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610, short *ptr, int len) ;
/*============================================================================================
** WAV GSM610 Reader initialisation function.
*/
int wav_gsm610_reader_init (SF_PRIVATE *psf, WAV_FMT *fmt)
{ GSM610_PRIVATE *pgsm610 ;
int true = 1 ;
psf->sf.seekable = SF_FALSE ;
if (psf->mode != SF_MODE_READ)
return SFE_BAD_MODE_RW ;
if (! (pgsm610 = malloc (sizeof (GSM610_PRIVATE))))
return SFE_MALLOC_FAILED ;
psf->fdata = (void*) pgsm610 ;
memset (pgsm610, 0, sizeof (GSM610_PRIVATE)) ;
if (! (pgsm610->gsm_data = gsm_create ()))
return SFE_MALLOC_FAILED ;
gsm_option (pgsm610->gsm_data, GSM_OPT_WAV49, &true) ;
if (psf->datalength % GSM610_BLOCKSIZE)
{ psf_sprintf (psf, "*** Warning : data chunk seems to be truncated.\n") ;
pgsm610->blocks = psf->datalength / GSM610_BLOCKSIZE + 1 ;
}
else
pgsm610->blocks = psf->datalength / GSM610_BLOCKSIZE ;
psf->sf.samples = GSM610_SAMPLES * pgsm610->blocks ;
wav_gsm610_read_block (psf, pgsm610) ; /* Read first block. */
return 0 ;
} /* wav_gsm610_reader_init */
/*============================================================================================
** WAV GSM610 writer initialisation function.
*/
int wav_gsm610_writer_init (SF_PRIVATE *psf, WAV_FMT *fmt)
{ GSM610_PRIVATE *pgsm610 ;
int true = 1 ;
if (fmt->format != 0x0031)
psf_sprintf (psf, "*** Warning : format tag != WAVE_FORMAT_GSM610.\n") ;
if (psf->mode != SF_MODE_WRITE)
return SFE_BAD_MODE_RW ;
if (! (pgsm610 = malloc (sizeof (GSM610_PRIVATE))))
return SFE_MALLOC_FAILED ;
psf->fdata = (void*) pgsm610 ;
memset (pgsm610, 0, sizeof (GSM610_PRIVATE)) ;
if (! (pgsm610->gsm_data = gsm_create ()))
return SFE_MALLOC_FAILED ;
gsm_option (pgsm610->gsm_data, GSM_OPT_WAV49, &true) ;
pgsm610->blockcount = 0 ;
pgsm610->samplecount = 0 ;
fmt->gsm610.blockalign = GSM610_BLOCKSIZE ;
fmt->gsm610.bitwidth = 0 ;
fmt->gsm610.extrabytes = 2 ;
fmt->gsm610.samplesperblock = GSM610_SAMPLES ;
fmt->gsm610.bytespersec = fmt->gsm610.samplerate * GSM610_BLOCKSIZE / GSM610_SAMPLES ;
if (fmt->gsm610.bytespersec * GSM610_SAMPLES / GSM610_BLOCKSIZE < fmt->gsm610.samplerate)
fmt->gsm610.bytespersec ++ ;
return 0 ;
} /* wav_gsm610_writer_init */
/*============================================================================================
** GSM 6.10 Read Functions.
*/
static
int wav_gsm610_read_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610)
{ int k ;
pgsm610->blockcount ++ ;
pgsm610->samplecount = 0 ;
if (pgsm610->blockcount > pgsm610->blocks)
{ memset (pgsm610->samples, 0, GSM610_SAMPLES * sizeof (short)) ;
return 1 ;
} ;
if ((k = fread (pgsm610->block, 1, GSM610_BLOCKSIZE, psf->file)) != GSM610_BLOCKSIZE)
psf_sprintf (psf, "*** Warning : short read (%d != %d).\n", k, GSM610_BLOCKSIZE) ;
if (gsm_decode (pgsm610->gsm_data, pgsm610->block, pgsm610->samples) < 0)
{ psf_sprintf (psf, "Error from gsm_decode() on frame : %d\n", pgsm610->blockcount) ;
return 0 ;
} ;
if (gsm_decode (pgsm610->gsm_data, pgsm610->block+(GSM610_BLOCKSIZE+1)/2, pgsm610->samples+GSM610_SAMPLES/2) < 0)
{ psf_sprintf (psf, "Error from gsm_decode() on frame : %d.5\n", pgsm610->blockcount) ;
return 0 ;
} ;
return 1 ;
} /* wav_gsm610_read_block */
static
int wav_gsm610_read (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610, short *ptr, int len)
{ int count, total = 0, index = 0 ;
while (index < len)
{ if (pgsm610->blockcount >= pgsm610->blocks && pgsm610->samplecount >= GSM610_SAMPLES)
{ memset (&(ptr[index]), 0, (len - index) * sizeof (short)) ;
return total ;
} ;
if (pgsm610->samplecount >= GSM610_SAMPLES)
wav_gsm610_read_block (psf, pgsm610) ;
count = GSM610_SAMPLES - pgsm610->samplecount ;
count = (len - index > count) ? count : len - index ;
memcpy (&(ptr[index]), &(pgsm610->samples [pgsm610->samplecount]), count * sizeof (short)) ;
index += count ;
pgsm610->samplecount += count ;
total = index ;
} ;
return total ;
} /* wav_gsm610_read */
int wav_gsm610_read_s (SF_PRIVATE *psf, short *ptr, int len)
{ GSM610_PRIVATE *pgsm610 ;
int total ;
if (! psf->fdata)
return 0 ;
pgsm610 = (GSM610_PRIVATE*) psf->fdata ;
total = wav_gsm610_read (psf, pgsm610, ptr, len) ;
return total ;
} /* wav_gsm610_read_s */
int wav_gsm610_read_i (SF_PRIVATE *psf, int *ptr, int len)
{ GSM610_PRIVATE *pgsm610 ;
short *sptr ;
int k, bufferlen, readcount = 0, count ;
int index = 0, total = 0 ;
if (! psf->fdata)
return 0 ;
pgsm610 = (GSM610_PRIVATE*) psf->fdata ;
sptr = (short*) psf->buffer ;
bufferlen = ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (short) ;
while (len > 0)
{ readcount = (len >= bufferlen) ? bufferlen : len ;
count = wav_gsm610_read (psf, pgsm610, sptr, readcount) ;
for (k = 0 ; k < readcount ; k++)
ptr [index+k] = (int) (sptr [k]) ;
index += readcount ;
total += count ;
len -= readcount ;
} ;
return total ;
} /* wav_gsm610_read_i */
int wav_gsm610_read_d (SF_PRIVATE *psf, double *ptr, int len, int normalize)
{ GSM610_PRIVATE *pgsm610 ;
short *sptr ;
int k, bufferlen, readcount = 0, count ;
int index = 0, total = 0 ;
double normfact ;
normfact = (normalize ? 1.0 / ((double) 0x8000) : 1.0) ;
if (! psf->fdata)
return 0 ;
pgsm610 = (GSM610_PRIVATE*) psf->fdata ;
sptr = (short*) psf->buffer ;
bufferlen = ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (short) ;
while (len > 0)
{ readcount = (len >= bufferlen) ? bufferlen : len ;
count = wav_gsm610_read (psf, pgsm610, sptr, readcount) ;
for (k = 0 ; k < readcount ; k++)
ptr [index+k] = normfact * (double) (sptr [k]) ;
index += readcount ;
total += count ;
len -= readcount ;
} ;
return total ;
} /* wav_gsm610_read_d */
off_t wav_gsm610_seek (SF_PRIVATE *psf, off_t offset, int whence)
{ GSM610_PRIVATE *pgsm610 ;
int newblock, newsample ;
if (! psf->fdata)
return 0 ;
pgsm610 = (GSM610_PRIVATE*) psf->fdata ;
if (! (psf->blockwidth && psf->datalength && psf->dataoffset))
{ psf->error = SFE_BAD_SEEK ;
return ((off_t) -1) ;
} ;
switch (whence)
{ case SEEK_SET :
if (offset < 0 || offset > pgsm610->blocks * GSM610_SAMPLES)
{ psf->error = SFE_BAD_SEEK ;
return ((off_t) -1) ;
} ;
newblock = offset / GSM610_SAMPLES ;
newsample = offset % GSM610_SAMPLES ;
break ;
case SEEK_CUR :
if (psf->current + offset < 0 || psf->current + offset > pgsm610->blocks * GSM610_SAMPLES)
{ psf->error = SFE_BAD_SEEK ;
return ((off_t) -1) ;
} ;
newblock = (psf->current + offset) / GSM610_SAMPLES ;
newsample = (psf->current + offset) % GSM610_SAMPLES ;
break ;
case SEEK_END :
if (offset > 0 || GSM610_SAMPLES * pgsm610->blocks + offset < 0)
{ psf->error = SFE_BAD_SEEK ;
return ((off_t) -1) ;
} ;
newblock = (GSM610_SAMPLES * pgsm610->blocks + offset) / GSM610_SAMPLES ;
newsample = (GSM610_SAMPLES * pgsm610->blocks + offset) % GSM610_SAMPLES ;
break ;
default :
psf->error = SFE_BAD_SEEK ;
return ((off_t) -1) ;
} ;
if (psf->mode == SF_MODE_READ)
{ fseek (psf->file, (int) (psf->dataoffset + newblock * GSM610_BLOCKSIZE), SEEK_SET) ;
pgsm610->blockcount = newblock ;
wav_gsm610_read_block (psf, pgsm610) ;
pgsm610->samplecount = newsample ;
}
else
{ /* What to do about write??? */
psf->error = SFE_BAD_SEEK ;
return ((off_t) -1) ;
} ;
psf->current = newblock * GSM610_SAMPLES + newsample ;
return psf->current ;
} /* wav_gsm610_seek */
/*==========================================================================================
** GSM 6.10 Write Functions.
*/
/*==========================================================================================
*/
static
int wav_gsm610_write_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610)
{ int k ;
/* Encode the samples. */
gsm_encode (pgsm610->gsm_data, pgsm610->samples, pgsm610->block) ;
gsm_encode (pgsm610->gsm_data, pgsm610->samples+GSM610_SAMPLES/2, pgsm610->block+GSM610_BLOCKSIZE/2) ;
/* Write the block to disk. */
if ((k = fwrite (pgsm610->block, 1, GSM610_BLOCKSIZE, psf->file)) != GSM610_BLOCKSIZE)
psf_sprintf (psf, "*** Warning : short write (%d != %d).\n", k, GSM610_BLOCKSIZE) ;
pgsm610->samplecount = 0 ;
pgsm610->blockcount ++ ;
/* Set samples to zero for next block. */
memset (pgsm610->samples, 0, GSM610_SAMPLES * sizeof (short)) ;
return 1 ;
} /* wav_gsm610_write_block */
static
int wav_gsm610_write (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610, short *ptr, int len)
{ int count, total = 0, index = 0 ;
while (index < len)
{ count = GSM610_SAMPLES - pgsm610->samplecount ;
if (count > len - index)
count = len - index ;
memcpy (&(pgsm610->samples [pgsm610->samplecount]), &(ptr [index]), count * sizeof (short)) ;
index += count ;
pgsm610->samplecount += count ;
total = index ;
if (pgsm610->samplecount >= GSM610_SAMPLES)
wav_gsm610_write_block (psf, pgsm610) ;
} ;
return total ;
} /* wav_gsm610_write */
int wav_gsm610_write_s (SF_PRIVATE *psf, short *ptr, int len)
{ GSM610_PRIVATE *pgsm610 ;
int total ;
if (! psf->fdata)
return 0 ;
pgsm610 = (GSM610_PRIVATE*) psf->fdata ;
total = wav_gsm610_write (psf, pgsm610, ptr, len) ;
return total ;
} /* wav_gsm610_write_s */
int wav_gsm610_write_i (SF_PRIVATE *psf, int *ptr, int len)
{ GSM610_PRIVATE *pgsm610 ;
short *sptr ;
int k, bufferlen, writecount = 0, count ;
int index = 0, total = 0 ;
if (! psf->fdata)
return 0 ;
pgsm610 = (GSM610_PRIVATE*) psf->fdata ;
sptr = (short*) psf->buffer ;
bufferlen = ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (short) ;
while (len > 0)
{ writecount = (len >= bufferlen) ? bufferlen : len ;
for (k = 0 ; k < writecount ; k++)
sptr [k] = (short) ptr [index+k] ;
count = wav_gsm610_write (psf, pgsm610, sptr, writecount) ;
index += writecount ;
total += count ;
len -= writecount ;
} ;
return total ;
} /* wav_gsm610_write_i */
int wav_gsm610_write_d (SF_PRIVATE *psf, double *ptr, int len, int normalize)
{ GSM610_PRIVATE *pgsm610 ;
short *sptr ;
int k, bufferlen, writecount = 0, count ;
int index = 0, total = 0 ;
double normfact ;
normfact = (normalize ? (double) 0x8000 : 1.0) ;
if (! psf->fdata)
return 0 ;
pgsm610 = (GSM610_PRIVATE*) psf->fdata ;
sptr = (short*) psf->buffer ;
bufferlen = ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (short) ;
while (len > 0)
{ writecount = (len >= bufferlen) ? bufferlen : len ;
for (k = 0 ; k < writecount ; k++)
sptr [k] = (short) (normfact * ptr [index+k]) ;
count = wav_gsm610_write (psf, pgsm610, sptr, writecount) ;
index += writecount ;
total += count ;
len -= writecount ;
} ;
return total ;
} /* wav_gsm610_write_d */
int wav_gsm610_close (SF_PRIVATE *psf)
{ GSM610_PRIVATE *pgsm610 ;
unsigned int dword ;
if (! psf->fdata)
return wav_close (psf) ;
pgsm610 = (GSM610_PRIVATE*) psf->fdata ;
if (psf->mode == SF_MODE_WRITE)
{ /* If a block has been partially assembled, write it out
** as the final block.
*/
if (pgsm610->samplecount && pgsm610->samplecount < GSM610_SAMPLES)
wav_gsm610_write_block (psf, pgsm610) ;
/* 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 ;
fseek (psf->file, (int) (psf->dataoffset - sizeof (dword)), SEEK_SET) ;
dword = H2LE_INT (psf->datalength) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
} ;
if (pgsm610->gsm_data)
gsm_destroy (pgsm610->gsm_data) ;
if (psf->fdata)
free (psf->fdata) ;
psf->fdata = NULL ;
return 0 ;
} /* wav_gsm610_close */