ref: 46d58fc082a8537f9de79342cd7d7d24974c984d
dir: /common/libsndfile/src/paf.c/
/*
** Copyright (C) 1999-2002 Erik de Castro Lopo <[email protected]>
**
** 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 <fcntl.h>
#include <string.h>
#include <ctype.h>
#include "sndfile.h"
#include "config.h"
#include "sfendian.h"
#include "float_cast.h"
#include "common.h"
/*------------------------------------------------------------------------------
** Macros to handle big/little endian issues.
*/
#define FAP_MARKER (MAKE_MARKER ('f', 'a', 'p', ' '))
#define PAF_MARKER (MAKE_MARKER (' ', 'p', 'a', 'f'))
/*------------------------------------------------------------------------------
** Other defines.
*/
#define PAF_HEADER_LENGTH 2048
#define PAF24_SAMPLES_PER_BLOCK 10
#define PAF24_BLOCK_SIZE 32
/*------------------------------------------------------------------------------
** Typedefs.
*/
typedef struct
{ int version ;
int endianness ;
int samplerate ;
int format ;
int channels ;
int source ;
} PAF_FMT ;
typedef struct
{ int max_blocks, channels, samplesperblock, blocksize ;
int read_block, write_block, read_count, write_count ;
sf_count_t sample_count ;
int *samples ;
unsigned char *block ;
unsigned char data [1] ; /* Data size fixed during malloc (). */
} PAF24_PRIVATE ;
/*------------------------------------------------------------------------------
** Private static functions.
*/
static int paf24_init (SF_PRIVATE *psf) ;
static int paf_read_header (SF_PRIVATE *psf) ;
static int paf_write_header (SF_PRIVATE *psf) ;
static sf_count_t paf24_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ;
static sf_count_t paf24_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ;
static sf_count_t paf24_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ;
static sf_count_t paf24_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ;
static sf_count_t paf24_write_s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ;
static sf_count_t paf24_write_i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ;
static sf_count_t paf24_write_f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ;
static sf_count_t paf24_write_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ;
static sf_count_t paf24_seek (SF_PRIVATE *psf, int mode, sf_count_t offset) ;
enum
{ PAF_PCM_16 = 0,
PAF_PCM_24 = 1,
PAF_PCM_S8 = 2
} ;
/*------------------------------------------------------------------------------
** Public function.
*/
int
paf_open (SF_PRIVATE *psf)
{ int subformat, error, endian ;
psf->dataoffset = PAF_HEADER_LENGTH ;
if (psf->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0))
{ if ((error = paf_read_header (psf)))
return error ;
} ;
subformat = psf->sf.format & SF_FORMAT_SUBMASK ;
if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR
/*- || (psf->mode == SFM_RDWR && psf->filelength <= 0)-*/)
{ if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_PAF)
return SFE_BAD_OPEN_FORMAT ;
endian = psf->sf.format & SF_FORMAT_ENDMASK ;
/* PAF is by default big endian. */
psf->endian = SF_ENDIAN_BIG ;
if (endian == SF_ENDIAN_LITTLE || (CPU_IS_LITTLE_ENDIAN && (endian == SF_ENDIAN_CPU)))
psf->endian = SF_ENDIAN_LITTLE ;
if ((error = paf_write_header (psf)))
return error ;
} ;
switch (subformat)
{ case SF_FORMAT_PCM_S8 :
psf->chars = SF_CHARS_SIGNED ;
psf->bytewidth = 1 ;
error = pcm_init (psf) ;
break ;
case SF_FORMAT_PCM_16 :
psf->bytewidth = 2 ;
error = pcm_init (psf) ;
break ;
case SF_FORMAT_PCM_24 :
error = paf24_init (psf) ;
break ;
default : return SFE_PAF_UNKNOWN_FORMAT ;
} ;
return error ;
} /* paf_open */
/*------------------------------------------------------------------------------
*/
static int
paf_read_header (SF_PRIVATE *psf)
{ PAF_FMT paf_fmt ;
int marker ;
psf_binheader_readf (psf, "pm", 0, &marker) ;
psf_log_printf (psf, "Signature : '%D'\n", marker) ;
if (marker == PAF_MARKER)
{ psf_binheader_readf (psf, "E444444", &(paf_fmt.version), &(paf_fmt.endianness),
&(paf_fmt.samplerate), &(paf_fmt.format), &(paf_fmt.channels), &(paf_fmt.source)) ;
}
else if (marker == FAP_MARKER)
{ psf_binheader_readf (psf, "e444444", &(paf_fmt.version), &(paf_fmt.endianness),
&(paf_fmt.samplerate), &(paf_fmt.format), &(paf_fmt.channels), &(paf_fmt.source)) ;
}
else
return SFE_PAF_NO_MARKER ;
psf_log_printf (psf, "Version : %d\n", paf_fmt.version) ;
if (paf_fmt.version != 0)
{ psf_log_printf (psf, "*** Bad version number. should be zero.\n") ;
return SFE_PAF_VERSION ;
} ;
psf_log_printf (psf, "Sample Rate : %d\n", paf_fmt.samplerate) ;
psf_log_printf (psf, "Channels : %d\n", paf_fmt.channels) ;
psf_log_printf (psf, "Endianness : %d => ", paf_fmt.endianness) ;
if (paf_fmt.endianness)
{ psf_log_printf (psf, "Little\n", paf_fmt.endianness) ;
psf->endian = SF_ENDIAN_LITTLE ;
}
else
{ psf_log_printf (psf, "Big\n", paf_fmt.endianness) ;
psf->endian = SF_ENDIAN_BIG ;
} ;
if (psf->filelength < PAF_HEADER_LENGTH)
return SFE_PAF_SHORT_HEADER ;
psf->datalength = psf->filelength - psf->dataoffset ;
psf_binheader_readf (psf, "p", (int) psf->dataoffset) ;
psf->sf.samplerate = paf_fmt.samplerate ;
psf->sf.channels = paf_fmt.channels ;
/* Only fill in type major. */
psf->sf.format = SF_FORMAT_PAF ;
psf_log_printf (psf, "Format : %d => ", paf_fmt.format) ;
/* PAF is by default big endian. */
psf->sf.format |= paf_fmt.endianness ? SF_ENDIAN_LITTLE : SF_ENDIAN_BIG ;
switch (paf_fmt.format)
{ case PAF_PCM_S8 :
psf_log_printf (psf, "8 bit linear PCM\n") ;
psf->bytewidth = 1 ;
psf->sf.format |= SF_FORMAT_PCM_S8 ;
psf->chars = SF_CHARS_SIGNED ;
psf->blockwidth = psf->bytewidth * psf->sf.channels ;
psf->sf.samples = psf->datalength / psf->blockwidth ;
break ;
case PAF_PCM_16 :
psf_log_printf (psf, "16 bit linear PCM\n") ;
psf->bytewidth = 2 ;
psf->sf.format |= SF_FORMAT_PCM_16 ;
psf->blockwidth = psf->bytewidth * psf->sf.channels ;
psf->sf.samples = psf->datalength / psf->blockwidth ;
break ;
case PAF_PCM_24 :
psf_log_printf (psf, "24 bit linear PCM\n") ;
psf->bytewidth = 3 ;
psf->sf.format |= SF_FORMAT_PCM_24 ;
psf->blockwidth = 0 ;
psf->sf.samples = PAF24_SAMPLES_PER_BLOCK * psf->datalength /
(PAF24_BLOCK_SIZE * psf->sf.channels) ;
break ;
default : psf_log_printf (psf, "Unknown\n") ;
return SFE_PAF_UNKNOWN_FORMAT ;
break ;
} ;
psf_log_printf (psf, "Source : %d => ", paf_fmt.source) ;
switch (paf_fmt.source)
{ case 1 : psf_log_printf (psf, "Analog Recording\n") ;
break ;
case 2 : psf_log_printf (psf, "Digital Transfer\n") ;
break ;
case 3 : psf_log_printf (psf, "Multi-track Mixdown\n") ;
break ;
case 5 : psf_log_printf (psf, "Audio Resulting From DSP Processing\n") ;
break ;
default : psf_log_printf (psf, "Unknown\n") ;
break ;
} ;
return 0 ;
} /* paf_read_header */
static int
paf_write_header (SF_PRIVATE *psf)
{ int paf_format ;
switch (psf->sf.format & SF_FORMAT_SUBMASK)
{ case SF_FORMAT_PCM_S8 :
paf_format = PAF_PCM_S8 ;
break ;
case SF_FORMAT_PCM_16 :
paf_format = PAF_PCM_16 ;
break ;
case SF_FORMAT_PCM_24 :
paf_format = PAF_PCM_24 ;
break ;
default : return SFE_PAF_UNKNOWN_FORMAT ;
} ;
/* Reset the current header length to zero. */
psf->header [0] = 0 ;
psf->headindex = 0 ;
psf_fseek (psf->filedes, 0, SEEK_SET) ;
if (psf->endian == SF_ENDIAN_BIG)
{ /* Marker, version, endianness, samplerate */
psf_binheader_writef (psf, "Em444", PAF_MARKER, 0, 0, psf->sf.samplerate) ;
/* format, channels, source */
psf_binheader_writef (psf, "E444", paf_format, psf->sf.channels, 0) ;
}
else if (psf->endian == SF_ENDIAN_LITTLE)
{ /* Marker, version, endianness, samplerate */
psf_binheader_writef (psf, "em444", FAP_MARKER, 0, 1, psf->sf.samplerate) ;
/* format, channels, source */
psf_binheader_writef (psf, "e444", paf_format, psf->sf.channels, 0) ;
} ;
/* Zero fill to dataoffset. */
psf_binheader_writef (psf, "z", (int) (psf->dataoffset - psf->headindex)) ;
psf_fwrite (psf->header, psf->headindex, 1, psf->filedes) ;
return 0 ;
} /* paf_write_header */
/*===============================================================================
** 24 bit PAF files have a really weird encoding.
** For a mono file, 10 samples (each being 3 bytes) are packed into a 32 byte
** block. The 8 ints in this 32 byte block are then endian swapped (as ints)
** if necessary before being written to disk.
** For a stereo file, blocks of 10 samples from the same channel are encoded
** into 32 bytes as for the mono case. The 32 byte blocks are then interleaved
** on disk.
** Reading has to reverse the above process :-).
** Weird!!!
**
** The code below attempts to gain efficiency while maintaining readability.
*/
static int paf24_read_block (SF_PRIVATE *psf, PAF24_PRIVATE *ppaf24) ;
static int paf24_write_block (SF_PRIVATE *psf, PAF24_PRIVATE *ppaf24) ;
static int paf24_close (SF_PRIVATE *psf) ;
static int
paf24_init (SF_PRIVATE *psf)
{ PAF24_PRIVATE *ppaf24 ;
int paf24size, max_blocks ;
paf24size = sizeof (PAF24_PRIVATE) + psf->sf.channels *
(PAF24_BLOCK_SIZE + PAF24_SAMPLES_PER_BLOCK * sizeof (int)) ;
if (! (psf->fdata = malloc (paf24size)))
return SFE_MALLOC_FAILED ;
ppaf24 = (PAF24_PRIVATE*) psf->fdata ;
memset (ppaf24, 0, paf24size) ;
ppaf24->channels = psf->sf.channels ;
ppaf24->block = (unsigned char*) ppaf24->data ;
ppaf24->samples = (int*) (ppaf24->data + PAF24_BLOCK_SIZE * ppaf24->channels) ;
ppaf24->blocksize = PAF24_BLOCK_SIZE * ppaf24->channels ;
ppaf24->samplesperblock = PAF24_SAMPLES_PER_BLOCK ;
if (psf->mode == SFM_READ || psf->mode == SFM_RDWR)
{ paf24_read_block (psf, ppaf24) ; /* Read first block. */
psf->read_short = paf24_read_s ;
psf->read_int = paf24_read_i ;
psf->read_float = paf24_read_f ;
psf->read_double = paf24_read_d ;
} ;
if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
{ psf->write_short = paf24_write_s ;
psf->write_int = paf24_write_i ;
psf->write_float = paf24_write_f ;
psf->write_double = paf24_write_d ;
} ;
psf->new_seek = paf24_seek ;
psf->close = paf24_close ;
psf->filelength = psf_get_filelen (psf->filedes) ;
psf->datalength = psf->filelength - psf->dataoffset ;
if (psf->datalength % PAF24_BLOCK_SIZE)
{ if (psf->mode == SFM_READ)
psf_log_printf (psf, "*** Warning : file seems to be truncated.\n") ;
max_blocks = psf->datalength / ppaf24->blocksize + 1 ;
}
else
max_blocks = psf->datalength / ppaf24->blocksize ;
ppaf24->read_block = 0 ;
if (psf->mode == SFM_RDWR)
ppaf24->write_block = max_blocks ;
else
ppaf24->write_block = 0 ;
psf->sf.samples = ppaf24->samplesperblock * max_blocks ;
ppaf24->sample_count = psf->sf.samples ;
return 0 ;
} /* paf24_init */
static sf_count_t
paf24_seek (SF_PRIVATE *psf, int mode, sf_count_t offset)
{ PAF24_PRIVATE *ppaf24 ;
int newblock, newsample ;
if (! psf->fdata)
{ psf->error = SFE_INTERNAL ;
return ((sf_count_t) -1) ;
} ;
ppaf24 = (PAF24_PRIVATE*) psf->fdata ;
if (mode == SFM_READ && ppaf24->write_count > 0)
paf24_write_block (psf, ppaf24) ;
newblock = offset / ppaf24->samplesperblock ;
newsample = offset % ppaf24->samplesperblock ;
switch (mode)
{ case SFM_READ :
if (offset > ppaf24->read_block * ppaf24->samplesperblock + ppaf24->read_count)
{ psf->error = SFE_BAD_SEEK ;
return ((sf_count_t) -1) ;
} ;
if (psf->last_op == SFM_WRITE && ppaf24->write_count)
paf24_write_block (psf, ppaf24) ;
psf_fseek (psf->filedes, psf->dataoffset + newblock * ppaf24->blocksize, SEEK_SET) ;
ppaf24->read_block = newblock ;
paf24_read_block (psf, ppaf24) ;
ppaf24->read_count = newsample ;
break ;
case SFM_WRITE :
if (offset > ppaf24->sample_count)
{ psf->error = SFE_BAD_SEEK ;
return ((sf_count_t) -1) ;
} ;
if (psf->last_op == SFM_WRITE && ppaf24->write_count)
paf24_write_block (psf, ppaf24) ;
psf_fseek (psf->filedes, psf->dataoffset + newblock * ppaf24->blocksize, SEEK_SET) ;
ppaf24->read_block = newblock ;
paf24_read_block (psf, ppaf24) ;
ppaf24->read_count = newsample ;
break ;
default :
psf->error = SFE_BAD_SEEK ;
return ((sf_count_t) -1) ;
} ;
return newblock * ppaf24->samplesperblock + newsample ;
} /* paf24_seek */
static int
paf24_close (SF_PRIVATE *psf)
{ PAF24_PRIVATE *ppaf24 ;
if (! psf->fdata)
return 0 ;
ppaf24 = (PAF24_PRIVATE*) psf->fdata ;
if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
{ if (ppaf24->write_count > 0)
paf24_write_block (psf, ppaf24) ;
} ;
free (psf->fdata) ;
psf->fdata = NULL ;
return 0 ;
} /* paf24_close */
/*---------------------------------------------------------------------------
*/
static int
paf24_read_block (SF_PRIVATE *psf, PAF24_PRIVATE *ppaf24)
{ int k, channel ;
unsigned char *cptr ;
ppaf24->read_block ++ ;
ppaf24->read_count = 0 ;
if (ppaf24->read_block * ppaf24->samplesperblock > ppaf24->sample_count)
{ memset (ppaf24->samples, 0, ppaf24->samplesperblock * ppaf24->channels) ;
return 1 ;
} ;
/* Read the block. */
if ((k = psf_fread (ppaf24->block, 1, ppaf24->blocksize, psf->filedes)) != ppaf24->blocksize)
psf_log_printf (psf, "*** Warning : short read (%d != %d).\n", k, ppaf24->blocksize) ;
/* Do endian swapping if necessary. */
if ((CPU_IS_BIG_ENDIAN && psf->endian == SF_ENDIAN_LITTLE) ||
(CPU_IS_LITTLE_ENDIAN && psf->endian == SF_ENDIAN_BIG))
{ endswap_int_array ((int*) ppaf24->data, 8 * ppaf24->channels) ;
} ;
/* Unpack block. */
for (k = 0 ; k < PAF24_SAMPLES_PER_BLOCK * ppaf24->channels ; k++)
{ channel = k % ppaf24->channels ;
cptr = ppaf24->block + PAF24_BLOCK_SIZE * channel + 3 * (k / ppaf24->channels) ;
ppaf24->samples [k] = (cptr [0] << 8) | (cptr [1] << 16) | (cptr [2] << 24) ;
} ;
return 1 ;
} /* paf24_read_block */
static int
paf24_read (SF_PRIVATE *psf, PAF24_PRIVATE *ppaf24, int *ptr, sf_count_t len)
{ sf_count_t count, total = 0, index = 0 ;
while (index < len)
{ if (ppaf24->read_block * ppaf24->samplesperblock >= ppaf24->sample_count)
{ memset (&(ptr[index]), 0, (size_t) ((len - index) * sizeof (int))) ;
return total ;
} ;
if (ppaf24->read_count >= ppaf24->samplesperblock)
paf24_read_block (psf, ppaf24) ;
count = (ppaf24->samplesperblock - ppaf24->read_count) * ppaf24->channels ;
count = (len - index > count) ? count : len - index ;
memcpy (&(ptr[index]), &(ppaf24->samples [ppaf24->read_count * ppaf24->channels]), count * sizeof (int)) ;
index += count ;
ppaf24->read_count += count / ppaf24->channels ;
total = index ;
} ;
return total ;
} /* paf24_read */
static sf_count_t
paf24_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len)
{ PAF24_PRIVATE *ppaf24 ;
int *iptr ;
int k, bufferlen, readcount = 0, count ;
int index = 0, total = 0 ;
if (! psf->fdata)
return 0 ;
ppaf24 = (PAF24_PRIVATE*) psf->fdata ;
iptr = (int*) psf->buffer ;
bufferlen = SF_BUFFER_LEN / sizeof (int) ;
while (len > 0)
{ readcount = (len >= bufferlen) ? bufferlen : len ;
count = paf24_read (psf, ppaf24, iptr, readcount) ;
for (k = 0 ; k < readcount ; k++)
ptr [index+k] = iptr [k] >> 16 ;
index += readcount ;
total += count ;
len -= readcount ;
} ;
return total ;
} /* paf24_read_s */
static sf_count_t
paf24_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len)
{ PAF24_PRIVATE *ppaf24 ;
int total ;
if (! psf->fdata)
return 0 ;
ppaf24 = (PAF24_PRIVATE*) psf->fdata ;
total = paf24_read (psf, ppaf24, ptr, len) ;
return total ;
} /* paf24_read_i */
static sf_count_t
paf24_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len)
{ PAF24_PRIVATE *ppaf24 ;
int *iptr ;
int k, bufferlen, readcount = 0, count ;
int index = 0, total = 0 ;
float normfact ;
if (! psf->fdata)
return 0 ;
ppaf24 = (PAF24_PRIVATE*) psf->fdata ;
normfact = (psf->norm_float == SF_TRUE) ? 1.0 / ((float) 0x80000000) : 1.0 ;
iptr = (int*) psf->buffer ;
bufferlen = SF_BUFFER_LEN / sizeof (int) ;
while (len > 0)
{ readcount = (len >= bufferlen) ? bufferlen : len ;
count = paf24_read (psf, ppaf24, iptr, readcount) ;
for (k = 0 ; k < readcount ; k++)
ptr [index+k] = normfact * iptr [k] ;
index += readcount ;
total += count ;
len -= readcount ;
} ;
return total ;
} /* paf24_read_f */
static sf_count_t
paf24_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len)
{ PAF24_PRIVATE *ppaf24 ;
int *iptr ;
int k, bufferlen, readcount = 0, count ;
int index = 0, total = 0 ;
double normfact ;
if (! psf->fdata)
return 0 ;
ppaf24 = (PAF24_PRIVATE*) psf->fdata ;
normfact = (psf->norm_double == SF_TRUE) ? 1.0 / ((double) 0x80000000) : 1.0 ;
iptr = (int*) psf->buffer ;
bufferlen = SF_BUFFER_LEN / sizeof (int) ;
while (len > 0)
{ readcount = (len >= bufferlen) ? bufferlen : len ;
count = paf24_read (psf, ppaf24, iptr, readcount) ;
for (k = 0 ; k < readcount ; k++)
ptr [index+k] = normfact * iptr [k] ;
index += readcount ;
total += count ;
len -= readcount ;
} ;
return total ;
} /* paf24_read_d */
/*---------------------------------------------------------------------------
*/
static int
paf24_write_block (SF_PRIVATE *psf, PAF24_PRIVATE *ppaf24)
{ int k, nextsample, channel ;
unsigned char *cptr ;
/* First pack block. */
for (k = 0 ; k < PAF24_SAMPLES_PER_BLOCK * ppaf24->channels ; k++)
{ channel = k % ppaf24->channels ;
cptr = ppaf24->block + PAF24_BLOCK_SIZE * channel + 3 * (k / ppaf24->channels) ;
nextsample = ppaf24->samples [k] >> 8 ;
cptr [0] = nextsample ;
cptr [1] = nextsample >> 8 ;
cptr [2] = nextsample >> 16 ;
} ;
/* Do endian swapping if necessary. */
if ((CPU_IS_BIG_ENDIAN && psf->endian == SF_ENDIAN_LITTLE) ||
(CPU_IS_LITTLE_ENDIAN && psf->endian == SF_ENDIAN_BIG))
{ endswap_int_array ((int*) ppaf24->data, 8 * ppaf24->channels) ;
} ;
/* Write block to disk. */
if ((k = psf_fwrite (ppaf24->block, 1, ppaf24->blocksize, psf->filedes)) != ppaf24->blocksize)
psf_log_printf (psf, "*** Warning : short write (%d != %d).\n", k, ppaf24->blocksize) ;
if (ppaf24->sample_count < ppaf24->write_block * ppaf24->samplesperblock + ppaf24->write_count)
ppaf24->sample_count = ppaf24->write_block * ppaf24->samplesperblock + ppaf24->write_count ;
if (ppaf24->write_count == ppaf24->samplesperblock)
{ ppaf24->write_block ++ ;
ppaf24->write_count = 0 ;
} ;
return 1 ;
} /* paf24_write_block */
static int
paf24_write (SF_PRIVATE *psf, PAF24_PRIVATE *ppaf24, int *ptr, sf_count_t len)
{ int count, total = 0, index = 0 ;
while (index < len)
{ count = (ppaf24->samplesperblock - ppaf24->write_count) * ppaf24->channels ;
if (count > len - index)
count = len - index ;
memcpy (&(ppaf24->samples [ppaf24->write_count * ppaf24->channels]), &(ptr [index]), count * sizeof (int)) ;
index += count ;
ppaf24->write_count += count / ppaf24->channels ;
total = index ;
if (ppaf24->write_count >= ppaf24->samplesperblock)
paf24_write_block (psf, ppaf24) ;
} ;
return total ;
} /* paf24_write */
static sf_count_t
paf24_write_s (SF_PRIVATE *psf, short *ptr, sf_count_t len)
{ PAF24_PRIVATE *ppaf24 ;
int *iptr ;
int k, bufferlen, writecount = 0, count ;
int index = 0, total = 0 ;
if (! psf->fdata)
return 0 ;
ppaf24 = (PAF24_PRIVATE*) psf->fdata ;
iptr = (int*) psf->buffer ;
bufferlen = SF_BUFFER_LEN / sizeof (int) ;
while (len > 0)
{ writecount = (len >= bufferlen) ? bufferlen : len ;
for (k = 0 ; k < writecount ; k++)
iptr [k] = ptr [index + k] << 16 ;
count = paf24_write (psf, ppaf24, iptr, writecount) ;
index += writecount ;
total += count ;
len -= writecount ;
} ;
return total ;
} /* paf24_write_s */
static sf_count_t
paf24_write_i (SF_PRIVATE *psf, int *ptr, sf_count_t len)
{ PAF24_PRIVATE *ppaf24 ;
int total = 0 ;
if (! psf->fdata)
return 0 ;
ppaf24 = (PAF24_PRIVATE*) psf->fdata ;
total = paf24_write (psf, ppaf24, ptr, len) ;
return total ;
} /* paf24_write_i */
static sf_count_t
paf24_write_f (SF_PRIVATE *psf, float *ptr, sf_count_t len)
{ PAF24_PRIVATE *ppaf24 ;
int *iptr ;
int k, bufferlen, writecount = 0, count ;
int index = 0, total = 0 ;
float normfact ;
if (! psf->fdata)
return 0 ;
ppaf24 = (PAF24_PRIVATE*) psf->fdata ;
normfact = (psf->norm_float == SF_TRUE) ? ((float) 0x80000000) : 1.0 ;
iptr = (int*) psf->buffer ;
bufferlen = SF_BUFFER_LEN / sizeof (int) ;
while (len > 0)
{ writecount = (len >= bufferlen) ? bufferlen : len ;
for (k = 0 ; k < writecount ; k++)
iptr [k] = lrintf (normfact * ptr [index+k]) ;
count = paf24_write (psf, ppaf24, iptr, writecount) ;
index += writecount ;
total += count ;
len -= writecount ;
} ;
return total ;
} /* paf24_write_f */
static sf_count_t
paf24_write_d (SF_PRIVATE *psf, double *ptr, sf_count_t len)
{ PAF24_PRIVATE *ppaf24 ;
int *iptr ;
int k, bufferlen, writecount = 0, count ;
int index = 0, total = 0 ;
double normfact ;
if (! psf->fdata)
return 0 ;
ppaf24 = (PAF24_PRIVATE*) psf->fdata ;
normfact = (psf->norm_double == SF_TRUE) ? ((double) 0x80000000) : 1.0 ;
iptr = (int*) psf->buffer ;
bufferlen = SF_BUFFER_LEN / sizeof (int) ;
while (len > 0)
{ writecount = (len >= bufferlen) ? bufferlen : len ;
for (k = 0 ; k < writecount ; k++)
iptr [k] = lrint (normfact * ptr [index+k]) ;
count = paf24_write (psf, ppaf24, iptr, writecount) ;
index += writecount ;
total += count ;
len -= writecount ;
} ;
return total ;
} /* paf24_write_d */