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freeswitch/libs/libsndfile/src/au.c

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/*
** Copyright (C) 1999-2004 Erik de Castro Lopo <erikd@mega-nerd.com>
**
** 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 "sfconfig.h"
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <ctype.h>
#include "sndfile.h"
#include "sfendian.h"
#include "common.h"
/*------------------------------------------------------------------------------
** Macros to handle big/little endian issues.
*/
#define DOTSND_MARKER (MAKE_MARKER ('.', 's', 'n', 'd'))
#define DNSDOT_MARKER (MAKE_MARKER ('d', 'n', 's', '.'))
#define AU_DATA_OFFSET 24
/*------------------------------------------------------------------------------
** Known AU file encoding types.
*/
enum
{ AU_ENCODING_ULAW_8 = 1, /* 8-bit u-law samples */
AU_ENCODING_PCM_8 = 2, /* 8-bit linear samples */
AU_ENCODING_PCM_16 = 3, /* 16-bit linear samples */
AU_ENCODING_PCM_24 = 4, /* 24-bit linear samples */
AU_ENCODING_PCM_32 = 5, /* 32-bit linear samples */
AU_ENCODING_FLOAT = 6, /* floating-point samples */
AU_ENCODING_DOUBLE = 7, /* double-precision float samples */
AU_ENCODING_INDIRECT = 8, /* fragmented sampled data */
AU_ENCODING_NESTED = 9, /* ? */
AU_ENCODING_DSP_CORE = 10, /* DSP program */
AU_ENCODING_DSP_DATA_8 = 11, /* 8-bit fixed-point samples */
AU_ENCODING_DSP_DATA_16 = 12, /* 16-bit fixed-point samples */
AU_ENCODING_DSP_DATA_24 = 13, /* 24-bit fixed-point samples */
AU_ENCODING_DSP_DATA_32 = 14, /* 32-bit fixed-point samples */
AU_ENCODING_DISPLAY = 16, /* non-audio display data */
AU_ENCODING_MULAW_SQUELCH = 17, /* ? */
AU_ENCODING_EMPHASIZED = 18, /* 16-bit linear with emphasis */
AU_ENCODING_NEXT = 19, /* 16-bit linear with compression (NEXT) */
AU_ENCODING_COMPRESSED_EMPHASIZED = 20, /* A combination of the two above */
AU_ENCODING_DSP_COMMANDS = 21, /* Music Kit DSP commands */
AU_ENCODING_DSP_COMMANDS_SAMPLES = 22, /* ? */
AU_ENCODING_ADPCM_G721_32 = 23, /* G721 32 kbs ADPCM - 4 bits per sample. */
AU_ENCODING_ADPCM_G722 = 24, /* G722 64 kbs ADPCM */
AU_ENCODING_ADPCM_G723_24 = 25, /* G723 24 kbs ADPCM - 3 bits per sample. */
AU_ENCODING_ADPCM_G723_40 = 26, /* G723 40 kbs ADPCM - 5 bits per sample. */
AU_ENCODING_ALAW_8 = 27
} ;
/*------------------------------------------------------------------------------
** Typedefs.
*/
typedef struct
{ int dataoffset ;
int datasize ;
int encoding ;
int samplerate ;
int channels ;
} AU_FMT ;
/*------------------------------------------------------------------------------
** Private static functions.
*/
static int au_close (SF_PRIVATE *psf) ;
static int au_format_to_encoding (int format) ;
static int au_write_header (SF_PRIVATE *psf, int calc_length) ;
static int au_read_header (SF_PRIVATE *psf) ;
/*------------------------------------------------------------------------------
** Public function.
*/
int
au_open (SF_PRIVATE *psf)
{ int subformat ;
int error = 0 ;
if (psf->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0))
{ if ((error = au_read_header (psf)))
return error ;
} ;
if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_AU)
return SFE_BAD_OPEN_FORMAT ;
subformat = psf->sf.format & SF_FORMAT_SUBMASK ;
if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
{ psf->endian = psf->sf.format & SF_FORMAT_ENDMASK ;
if (CPU_IS_LITTLE_ENDIAN && psf->endian == SF_ENDIAN_CPU)
psf->endian = SF_ENDIAN_LITTLE ;
else if (psf->endian != SF_ENDIAN_LITTLE)
psf->endian = SF_ENDIAN_BIG ;
if (au_write_header (psf, SF_FALSE))
return psf->error ;
psf->write_header = au_write_header ;
} ;
psf->container_close = au_close ;
psf->blockwidth = psf->bytewidth * psf->sf.channels ;
switch (subformat)
{ case SF_FORMAT_ULAW : /* 8-bit Ulaw encoding. */
ulaw_init (psf) ;
break ;
case SF_FORMAT_PCM_S8 : /* 8-bit linear PCM. */
error = pcm_init (psf) ;
break ;
case SF_FORMAT_PCM_16 : /* 16-bit linear PCM. */
case SF_FORMAT_PCM_24 : /* 24-bit linear PCM */
case SF_FORMAT_PCM_32 : /* 32-bit linear PCM. */
error = pcm_init (psf) ;
break ;
case SF_FORMAT_ALAW : /* 8-bit Alaw encoding. */
alaw_init (psf) ;
break ;
/* Lite remove start */
case SF_FORMAT_FLOAT : /* 32-bit floats. */
error = float32_init (psf) ;
break ;
case SF_FORMAT_DOUBLE : /* 64-bit double precision floats. */
error = double64_init (psf) ;
break ;
case SF_FORMAT_G721_32 :
error = g72x_init (psf) ;
psf->sf.seekable = SF_FALSE ;
break ;
case SF_FORMAT_G723_24 :
error = g72x_init (psf) ;
psf->sf.seekable = SF_FALSE ;
break ;
case SF_FORMAT_G723_40 :
error = g72x_init (psf) ;
psf->sf.seekable = SF_FALSE ;
break ;
/* Lite remove end */
default : break ;
} ;
return error ;
} /* au_open */
/*------------------------------------------------------------------------------
*/
static int
au_close (SF_PRIVATE *psf)
{
if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
au_write_header (psf, SF_TRUE) ;
return 0 ;
} /* au_close */
static int
au_write_header (SF_PRIVATE *psf, int calc_length)
{ sf_count_t current ;
int encoding, datalength ;
if (psf->pipeoffset > 0)
return 0 ;
current = psf_ftell (psf) ;
if (calc_length)
{ psf->filelength = psf_get_filelen (psf) ;
psf->datalength = psf->filelength - psf->dataoffset ;
if (psf->dataend)
psf->datalength -= psf->filelength - psf->dataend ;
psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ;
} ;
encoding = au_format_to_encoding (psf->sf.format & SF_FORMAT_SUBMASK) ;
if (! encoding)
return (psf->error = SFE_BAD_OPEN_FORMAT) ;
/* Reset the current header length to zero. */
psf->header [0] = 0 ;
psf->headindex = 0 ;
/*
** Only attempt to seek if we are not writng to a pipe. If we are
** writing to a pipe we shouldn't be here anyway.
*/
if (psf->is_pipe == SF_FALSE)
psf_fseek (psf, 0, SEEK_SET) ;
/*
** AU format files allow a datalength value of -1 if the datalength
** is not know at the time the header is written.
** Also use this value of -1 if the datalength > 2 gigabytes.
*/
if (psf->datalength < 0 || psf->datalength > 0x7FFFFFFF)
datalength = -1 ;
else
datalength = (int) (psf->datalength & 0x7FFFFFFF) ;
if (psf->endian == SF_ENDIAN_BIG)
{ psf_binheader_writef (psf, "Em4", DOTSND_MARKER, AU_DATA_OFFSET) ;
psf_binheader_writef (psf, "E4444", datalength, encoding, psf->sf.samplerate, psf->sf.channels) ;
}
else if (psf->endian == SF_ENDIAN_LITTLE)
{ psf_binheader_writef (psf, "em4", DNSDOT_MARKER, AU_DATA_OFFSET) ;
psf_binheader_writef (psf, "e4444", datalength, encoding, psf->sf.samplerate, psf->sf.channels) ;
}
else
return (psf->error = SFE_BAD_OPEN_FORMAT) ;
/* Header construction complete so write it out. */
psf_fwrite (psf->header, psf->headindex, 1, psf) ;
if (psf->error)
return psf->error ;
psf->dataoffset = psf->headindex ;
if (current > 0)
psf_fseek (psf, current, SEEK_SET) ;
return psf->error ;
} /* au_write_header */
static int
au_format_to_encoding (int format)
{
switch (format)
{ case SF_FORMAT_PCM_S8 : return AU_ENCODING_PCM_8 ;
case SF_FORMAT_PCM_16 : return AU_ENCODING_PCM_16 ;
case SF_FORMAT_PCM_24 : return AU_ENCODING_PCM_24 ;
case SF_FORMAT_PCM_32 : return AU_ENCODING_PCM_32 ;
case SF_FORMAT_FLOAT : return AU_ENCODING_FLOAT ;
case SF_FORMAT_DOUBLE : return AU_ENCODING_DOUBLE ;
case SF_FORMAT_ULAW : return AU_ENCODING_ULAW_8 ;
case SF_FORMAT_ALAW : return AU_ENCODING_ALAW_8 ;
case SF_FORMAT_G721_32 : return AU_ENCODING_ADPCM_G721_32 ;
case SF_FORMAT_G723_24 : return AU_ENCODING_ADPCM_G723_24 ;
case SF_FORMAT_G723_40 : return AU_ENCODING_ADPCM_G723_40 ;
default : break ;
} ;
return 0 ;
} /* au_format_to_encoding */
static int
au_read_header (SF_PRIVATE *psf)
{ AU_FMT au_fmt ;
int marker, dword ;
memset (&au_fmt, 0, sizeof (au_fmt)) ;
psf_binheader_readf (psf, "pm", 0, &marker) ;
psf_log_printf (psf, "%M\n", marker) ;
if (marker == DOTSND_MARKER)
{ psf->endian = SF_ENDIAN_BIG ;
psf_binheader_readf (psf, "E44444", &(au_fmt.dataoffset), &(au_fmt.datasize),
&(au_fmt.encoding), &(au_fmt.samplerate), &(au_fmt.channels)) ;
}
else if (marker == DNSDOT_MARKER)
{ psf->endian = SF_ENDIAN_LITTLE ;
psf_binheader_readf (psf, "e44444", &(au_fmt.dataoffset), &(au_fmt.datasize),
&(au_fmt.encoding), &(au_fmt.samplerate), &(au_fmt.channels)) ;
}
else
return SFE_AU_NO_DOTSND ;
psf_log_printf (psf, " Data Offset : %d\n", au_fmt.dataoffset) ;
if (psf->fileoffset > 0 && au_fmt.datasize == -1)
{ psf_log_printf (psf, " Data Size : -1\n") ;
return SFE_AU_EMBED_BAD_LEN ;
} ;
if (psf->fileoffset > 0)
{ psf->filelength = au_fmt.dataoffset + au_fmt.datasize ;
psf_log_printf (psf, " Data Size : %d\n", au_fmt.datasize) ;
}
else if (au_fmt.datasize == -1 || au_fmt.dataoffset + au_fmt.datasize == psf->filelength)
psf_log_printf (psf, " Data Size : %d\n", au_fmt.datasize) ;
else if (au_fmt.dataoffset + au_fmt.datasize < psf->filelength)
{ psf->filelength = au_fmt.dataoffset + au_fmt.datasize ;
psf_log_printf (psf, " Data Size : %d\n", au_fmt.datasize) ;
}
else
{ dword = psf->filelength - au_fmt.dataoffset ;
psf_log_printf (psf, " Data Size : %d (should be %d)\n", au_fmt.datasize, dword) ;
au_fmt.datasize = dword ;
} ;
psf->dataoffset = au_fmt.dataoffset ;
psf->datalength = psf->filelength - psf->dataoffset ;
if (psf_ftell (psf) < psf->dataoffset)
psf_binheader_readf (psf, "j", psf->dataoffset - psf_ftell (psf)) ;
psf->sf.samplerate = au_fmt.samplerate ;
psf->sf.channels = au_fmt.channels ;
/* Only fill in type major. */
if (psf->endian == SF_ENDIAN_BIG)
psf->sf.format = SF_FORMAT_AU ;
else if (psf->endian == SF_ENDIAN_LITTLE)
psf->sf.format = SF_ENDIAN_LITTLE | SF_FORMAT_AU ;
psf_log_printf (psf, " Encoding : %d => ", au_fmt.encoding) ;
psf->sf.format = psf->sf.format & SF_FORMAT_ENDMASK ;
switch (au_fmt.encoding)
{ case AU_ENCODING_ULAW_8 :
psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_ULAW ;
psf->bytewidth = 1 ; /* Before decoding */
psf_log_printf (psf, "8-bit ISDN u-law\n") ;
break ;
case AU_ENCODING_PCM_8 :
psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_PCM_S8 ;
psf->bytewidth = 1 ;
psf_log_printf (psf, "8-bit linear PCM\n") ;
break ;
case AU_ENCODING_PCM_16 :
psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_PCM_16 ;
psf->bytewidth = 2 ;
psf_log_printf (psf, "16-bit linear PCM\n") ;
break ;
case AU_ENCODING_PCM_24 :
psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_PCM_24 ;
psf->bytewidth = 3 ;
psf_log_printf (psf, "24-bit linear PCM\n") ;
break ;
case AU_ENCODING_PCM_32 :
psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_PCM_32 ;
psf->bytewidth = 4 ;
psf_log_printf (psf, "32-bit linear PCM\n") ;
break ;
case AU_ENCODING_FLOAT :
psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_FLOAT ;
psf->bytewidth = 4 ;
psf_log_printf (psf, "32-bit float\n") ;
break ;
case AU_ENCODING_DOUBLE :
psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_DOUBLE ;
psf->bytewidth = 8 ;
psf_log_printf (psf, "64-bit double precision float\n") ;
break ;
case AU_ENCODING_ALAW_8 :
psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_ALAW ;
psf->bytewidth = 1 ; /* Before decoding */
psf_log_printf (psf, "8-bit ISDN A-law\n") ;
break ;
case AU_ENCODING_ADPCM_G721_32 :
psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_G721_32 ;
psf->bytewidth = 0 ;
psf_log_printf (psf, "G721 32kbs ADPCM\n") ;
break ;
case AU_ENCODING_ADPCM_G723_24 :
psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_G723_24 ;
psf->bytewidth = 0 ;
psf_log_printf (psf, "G723 24kbs ADPCM\n") ;
break ;
case AU_ENCODING_ADPCM_G723_40 :
psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_G723_40 ;
psf->bytewidth = 0 ;
psf_log_printf (psf, "G723 40kbs ADPCM\n") ;
break ;
case AU_ENCODING_ADPCM_G722 :
psf_log_printf (psf, "G722 64 kbs ADPCM (unsupported)\n") ;
break ;
case AU_ENCODING_NEXT :
psf_log_printf (psf, "Weird NeXT encoding format (unsupported)\n") ;
break ;
default :
psf_log_printf (psf, "Unknown!!\n") ;
break ;
} ;
psf_log_printf (psf, " Sample Rate : %d\n", au_fmt.samplerate) ;
psf_log_printf (psf, " Channels : %d\n", au_fmt.channels) ;
psf->blockwidth = psf->sf.channels * psf->bytewidth ;
if (! psf->sf.frames && psf->blockwidth)
psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ;
return 0 ;
} /* au_read_header */
/*
** Do not edit or modify anything in this comment block.
** The arch-tag line is a file identity tag for the GNU Arch
** revision control system.
**
** arch-tag: 31f691b1-cde9-4ed2-9469-6bca60fb9cd0
*/
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