ref: d44e2d7e3a6e0cba9781f5366003212652d542e5
dir: /common/libsndfile/src/svx.c/
/*
** Copyright (C) 1999-2001 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 <stdarg.h>
#include "sndfile.h"
#include "config.h"
#include "sfendian.h"
#include "common.h"
/*------------------------------------------------------------------------------
* Macros to handle big/little endian issues.
*/
#define FORM_MARKER (MAKE_MARKER ('F', 'O', 'R', 'M'))
#define SVX8_MARKER (MAKE_MARKER ('8', 'S', 'V', 'X'))
#define SV16_MARKER (MAKE_MARKER ('1', '6', 'S', 'V'))
#define VHDR_MARKER (MAKE_MARKER ('V', 'H', 'D', 'R'))
#define BODY_MARKER (MAKE_MARKER ('B', 'O', 'D', 'Y'))
#define ATAK_MARKER (MAKE_MARKER ('A','T','A','K'))
#define RLSE_MARKER (MAKE_MARKER ('R','L','S','E'))
#define c_MARKER (MAKE_MARKER ('(', 'c', ')', ' '))
#define NAME_MARKER (MAKE_MARKER ('N', 'A', 'M', 'E'))
#define AUTH_MARKER (MAKE_MARKER ('A', 'U', 'T', 'H'))
#define ANNO_MARKER (MAKE_MARKER ('A', 'N', 'N', 'O'))
#define CHAN_MARKER (MAKE_MARKER ('C', 'H', 'A', 'N'))
/*------------------------------------------------------------------------------
* Typedefs for file chunks.
*/
typedef struct
{ unsigned int oneShotHiSamples, repeatHiSamples, samplesPerHiCycle ;
unsigned short samplesPerSec ;
unsigned char octave, compression ;
unsigned int volume ;
} VHDR_CHUNK ;
enum {
HAVE_FORM = 0x01,
HAVE_SVX = 0x02,
HAVE_VHDR = 0x04,
HAVE_BODY = 0x08
} ;
/*------------------------------------------------------------------------------
* Private static functions.
*/
static int svx_close (SF_PRIVATE *psf) ;
static int svx_write_header (SF_PRIVATE *psf) ;
/*
static void endswap_vhdr_chunk (VHDR_CHUNK *vhdr) ;
*/
/*------------------------------------------------------------------------------
** Public functions.
*/
int
svx_open_read (SF_PRIVATE *psf)
{ VHDR_CHUNK vhdr ;
unsigned int FORMsize, vhdrsize, dword, marker ;
int filetype = 0, parsestage = 0, done = 0, error ;
int bytecount = 0, channels ;
psf_binheader_readf (psf, "p", 0) ;
/* Set default number of channels. */
psf->sf.channels = 1 ;
while (! done)
{ psf_binheader_readf (psf, "m", &marker) ;
switch (marker)
{ case FORM_MARKER :
if (parsestage)
return SFE_SVX_NO_FORM ;
psf_binheader_readf (psf, "L", &FORMsize) ;
if (FORMsize != psf->filelength - 2 * sizeof (dword))
{ dword = psf->filelength - 2 * sizeof (dword);
psf_log_printf (psf, "FORM : %d (should be %d)\n", FORMsize, dword) ;
FORMsize = dword ;
}
else
psf_log_printf (psf, "FORM : %d\n", FORMsize) ;
parsestage |= HAVE_FORM ;
break ;
case SVX8_MARKER :
case SV16_MARKER :
if (! (parsestage & HAVE_FORM))
return SFE_SVX_NO_FORM ;
filetype = marker ;
psf_log_printf (psf, " %D\n", marker) ;
parsestage |= HAVE_SVX ;
break ;
case VHDR_MARKER :
if (! (parsestage & (HAVE_FORM | HAVE_SVX)))
return SFE_SVX_NO_FORM ;
psf_binheader_readf (psf, "L", &vhdrsize) ;
psf_log_printf (psf, " VHDR : %d\n", vhdrsize) ;
psf_binheader_readf (psf, "LLLWbbL", &(vhdr.oneShotHiSamples), &(vhdr.repeatHiSamples),
&(vhdr.samplesPerHiCycle), &(vhdr.samplesPerSec), &(vhdr.octave), &(vhdr.compression),
&(vhdr.volume)) ;
psf_log_printf (psf, " OneShotHiSamples : %d\n", vhdr.oneShotHiSamples) ;
psf_log_printf (psf, " RepeatHiSamples : %d\n", vhdr.repeatHiSamples) ;
psf_log_printf (psf, " samplesPerHiCycle : %d\n", vhdr.samplesPerHiCycle) ;
psf_log_printf (psf, " Sample Rate : %d\n", vhdr.samplesPerSec) ;
psf_log_printf (psf, " Octave : %d\n", vhdr.octave) ;
psf_log_printf (psf, " Compression : %d => ", vhdr.compression) ;
switch (vhdr.compression)
{ case 0 : psf_log_printf (psf, "None.\n") ;
break ;
case 1 : psf_log_printf (psf, "Fibonacci delta\n") ;
break ;
case 2 : psf_log_printf (psf, "Exponential delta\n") ;
break ;
} ;
psf_log_printf (psf, " Volume : %d\n", vhdr.volume) ;
psf->sf.samplerate = vhdr.samplesPerSec ;
if (filetype == SVX8_MARKER)
psf->sf.pcmbitwidth = 8 ;
else if (filetype == SV16_MARKER)
psf->sf.pcmbitwidth = 16 ;
parsestage |= HAVE_VHDR ;
break ;
case BODY_MARKER :
if (! (parsestage & HAVE_VHDR))
return SFE_SVX_NO_BODY ;
psf_binheader_readf (psf, "L", &(psf->datalength)) ;
psf->dataoffset = ftell (psf->file) ;
if (psf->datalength > psf->filelength - psf->dataoffset)
{ psf_log_printf (psf, " BODY : %d (should be %d)\n", psf->datalength, psf->filelength - psf->dataoffset) ;
psf->datalength = psf->filelength - psf->dataoffset ;
}
else
psf_log_printf (psf, " BODY : %d\n", psf->datalength) ;
parsestage |= HAVE_BODY ;
if (! psf->sf.seekable)
break ;
fseek (psf->file, psf->datalength, SEEK_CUR) ;
break ;
case NAME_MARKER :
case ANNO_MARKER :
if (! (parsestage & HAVE_SVX))
return SFE_SVX_NO_FORM ;
psf_binheader_readf (psf, "L", &dword) ;
psf_log_printf (psf, " %D : %d\n", marker, dword) ;
psf_binheader_readf (psf, "j", dword) ;
break ;
case CHAN_MARKER :
if (! (parsestage & HAVE_SVX))
return SFE_SVX_NO_FORM ;
psf_binheader_readf (psf, "L", &dword) ;
psf_log_printf (psf, " %D : %d\n", marker, dword) ;
bytecount += psf_binheader_readf (psf, "L", &channels) ;
psf_log_printf (psf, " Channels : %d => %d\n", channels) ;
psf_binheader_readf (psf, "j", dword - bytecount) ;
break ;
case AUTH_MARKER :
case c_MARKER :
if (! (parsestage & HAVE_SVX))
return SFE_SVX_NO_FORM ;
psf_binheader_readf (psf, "L", &dword) ;
psf_log_printf (psf, " %D : %d\n", marker, dword) ;
psf_binheader_readf (psf, "j", dword) ;
break ;
default :
if (isprint ((marker >> 24) & 0xFF) && isprint ((marker >> 16) & 0xFF)
&& isprint ((marker >> 8) & 0xFF) && isprint (marker & 0xFF))
{ psf_binheader_readf (psf, "L", &dword) ;
psf_log_printf (psf, "%D : %d (unknown marker)\n", marker, dword) ;
psf_binheader_readf (psf, "j", dword) ;
break ;
} ;
if ((dword = ftell (psf->file)) & 0x03)
{ psf_log_printf (psf, " Unknown chunk marker at position %d. Resynching.\n", dword - 4) ;
psf_binheader_readf (psf, "j", -3) ;
break ;
} ;
psf_log_printf (psf, "*** Unknown chunk marker : %X. Exiting parser.\n", marker) ;
done = 1 ;
} ; /* switch (marker) */
if (ferror (psf->file))
{ psf_log_printf (psf, "*** Error on file handle. ***\n", marker) ;
clearerr (psf->file) ;
break ;
} ;
if (! psf->sf.seekable && (parsestage & HAVE_BODY))
break ;
if (ftell (psf->file) >= (long) (psf->filelength - (2 * sizeof (dword))))
break ;
} ; /* while (1) */
if (vhdr.compression)
return SFE_SVX_BAD_COMP ;
if (! psf->dataoffset)
return SFE_SVX_NO_DATA ;
psf->sf.format = (SF_FORMAT_SVX | SF_FORMAT_PCM);
psf->sf.sections = 1 ;
psf->current = 0 ;
psf->endian = SF_ENDIAN_BIG ; /* All SVX files are big endian. */
psf->sf.seekable = SF_TRUE ;
psf->bytewidth = BITWIDTH2BYTES (psf->sf.pcmbitwidth) ;
psf->blockwidth = psf->sf.channels * psf->bytewidth ;
if (psf->blockwidth)
psf->sf.samples = psf->datalength / psf->blockwidth ;
fseek (psf->file, psf->dataoffset, SEEK_SET) ;
psf->close = (func_close) svx_close ;
psf->chars = SF_CHARS_SIGNED ;
if ((error = pcm_read_init (psf)))
return error ;
return 0 ;
} /* svx_open_read */
int
svx_open_write (SF_PRIVATE *psf)
{ int error ;
if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_SVX)
return SFE_BAD_OPEN_FORMAT ;
if ((psf->sf.format & SF_FORMAT_SUBMASK) != SF_FORMAT_PCM)
return SFE_BAD_OPEN_FORMAT ;
if (psf->sf.pcmbitwidth != 8 && psf->sf.pcmbitwidth != 16)
return SFE_BAD_OPEN_FORMAT ;
psf->endian = SF_ENDIAN_BIG ; /* All SVX files are big endian. */
psf->sf.seekable = SF_TRUE ;
psf->bytewidth = BITWIDTH2BYTES (psf->sf.pcmbitwidth) ;
psf->blockwidth = psf->bytewidth * psf->sf.channels ;
psf->datalength = psf->blockwidth * psf->sf.samples ;
psf->filelength = psf->datalength + psf->dataoffset ;
psf->error = 0 ;
error = svx_write_header (psf) ;
if (error)
return error ;
psf->close = (func_close) svx_close ;
psf->write_header = (func_wr_hdr) svx_write_header ;
psf->chars = SF_CHARS_SIGNED ;
if ((error = pcm_write_init (psf)))
return error ;
return 0 ;
} /* svx_open_write */
/*------------------------------------------------------------------------------
*/
static int
svx_close (SF_PRIVATE *psf)
{
if (psf->mode == SF_MODE_WRITE)
{ /* Now we know for certain the length of the file we can re-write
** correct values for the FORM, 8SVX and BODY chunks.
*/
fseek (psf->file, 0, SEEK_END) ;
psf->filelength = ftell (psf->file) ;
fseek (psf->file, 0, SEEK_SET) ;
psf->datalength = psf->filelength - psf->dataoffset ;
svx_write_header (psf) ;
} ;
if (psf->fdata)
free (psf->fdata) ;
psf->fdata = NULL ;
return 0 ;
} /* svx_close */
static int
svx_write_header (SF_PRIVATE *psf)
{ static char annotation [] = "libsndfile by Erik de Castro Lopo\0\0\0" ;
psf->header [0] = 0 ;
psf->headindex = 0 ;
fseek (psf->file, 0, SEEK_SET) ;
/* FORM marker and FORM size. */
psf_binheader_writef (psf, "mL", FORM_MARKER, psf->filelength - 8) ;
psf_binheader_writef (psf, "m", (psf->bytewidth == 1) ? SVX8_MARKER : SV16_MARKER) ;
/* VHDR chunk. */
psf_binheader_writef (psf, "mL", VHDR_MARKER, sizeof (VHDR_CHUNK)) ;
/* VHDR : oneShotHiSamples, repeatHiSamples, samplesPerHiCycle */
psf_binheader_writef (psf, "LLL", psf->sf.samples, 0, 0) ;
/* VHDR : samplesPerSec, octave, compression */
psf_binheader_writef (psf, "Wbb", psf->sf.samplerate, 1, 0) ;
/* VHDR : volume */
psf_binheader_writef (psf, "L", (psf->bytewidth == 1) ? 255 : 0xFFFF) ;
/* Filename and annotation strings. */
psf_binheader_writef (psf, "mSmS", NAME_MARKER, psf->filename, ANNO_MARKER, annotation) ;
/* BODY marker and size. */
psf_binheader_writef (psf, "mL", BODY_MARKER, psf->datalength) ;
fwrite (psf->header, psf->headindex, 1, psf->file) ;
psf->dataoffset = psf->headindex ;
return 0 ;
} /* svx_write_header */
/*-
static void
endswap_vhdr_chunk (VHDR_CHUNK *vhdr)
{ vhdr->oneShotHiSamples = ENDSWAP_INT (vhdr->oneShotHiSamples) ;
vhdr->repeatHiSamples = ENDSWAP_INT (vhdr->repeatHiSamples) ;
vhdr->samplesPerHiCycle = ENDSWAP_INT (vhdr->samplesPerHiCycle) ;
vhdr->samplesPerSec = ENDSWAP_SHORT (vhdr->samplesPerSec) ;
vhdr->volume = ENDSWAP_INT (vhdr->volume) ;
} /+* endswap_vhdr_chunk *+/
-*/