ref: 46d58fc082a8537f9de79342cd7d7d24974c984d
dir: /common/libsndfile/src/au.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 "common.h"
#include "au.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,
AU_ENCODING_ADPCM_G723_24 = 25, /* G723 24 kbs ADPCM - 3 bits per sample. */
AU_ENCODING_ADPCM_G723_5 = 26,
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) ;
static int au_read_header (SF_PRIVATE *psf) ;
/*------------------------------------------------------------------------------
** Public function.
*/
int
au_open (SF_PRIVATE *psf)
{ int encoding, 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 (! (encoding = au_write_header (psf)))
return psf->error ;
psf->write_header = au_write_header ;
} ;
psf->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. */
psf->chars = SF_CHARS_SIGNED ;
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_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_ALAW : /* 8-bit Alaw encoding. */
alaw_init (psf) ;
break ;
case SF_FORMAT_G721_32 :
if (psf->mode == SFM_READ)
error = au_g72x_reader_init (psf, AU_H_G721_32) ;
else if (psf->mode == SFM_WRITE)
error = au_g72x_writer_init (psf, AU_H_G721_32) ;
psf->sf.seekable = SF_FALSE ;
break ;
case SF_FORMAT_G723_24 :
if (psf->mode == SFM_READ)
error = au_g72x_reader_init (psf, AU_H_G723_24) ;
else if (psf->mode == SFM_WRITE)
error = au_g72x_writer_init (psf, AU_H_G723_24) ;
psf->sf.seekable = SF_FALSE ;
break ;
default : break ;
} ;
return error ;
} /* au_open */
int
au_nh_open (SF_PRIVATE *psf)
{
if (psf->mode == SFM_RDWR)
return SFE_BAD_OPEN_FORMAT ;
if (psf_fseek (psf->filedes, psf->dataoffset, SEEK_SET))
return SFE_BAD_SEEK ;
psf_log_printf (psf, "Headers-less u-law encoded file.\n") ;
psf_log_printf (psf, "Setting up for 8kHz, mono, u-law.\n") ;
psf->sf.format = SF_FORMAT_AU | SF_FORMAT_ULAW ;
psf->dataoffset = 0 ;
psf->endian = 0 ; /* Irrelevant but it must be something. */
psf->sf.samplerate = 8000 ;
psf->sf.channels = 1 ;
psf->bytewidth = 1 ; /* Before decoding */
ulaw_init (psf) ;
psf->close = au_close ;
psf->blockwidth = 1 ;
psf->sf.samples = psf->filelength ;
psf->datalength = psf->filelength - AU_DATA_OFFSET ;
return 0 ;
} /* au_nh_open */
/*------------------------------------------------------------------------------
*/
static int
au_close (SF_PRIVATE *psf)
{
if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
{ /* Now we know for certain the length of the file we can
* re-write correct values for the datasize header element.
*/
psf_fseek (psf->filedes, 0, SEEK_END) ;
psf->filelength = psf_ftell (psf->filedes) ;
psf->datalength = psf->filelength - AU_DATA_OFFSET ;
psf_fseek (psf->filedes, 0, SEEK_SET) ;
psf->sf.samples = psf->datalength / psf->blockwidth ;
au_write_header (psf) ;
} ;
if (psf->fdata)
free (psf->fdata) ;
psf->fdata = NULL ;
return 0 ;
} /* au_close */
static int
au_write_header (SF_PRIVATE *psf)
{ int encoding ;
encoding = au_format_to_encoding (psf->sf.format & SF_FORMAT_SUBMASK) ;
if (! encoding)
{ psf->error = SFE_BAD_OPEN_FORMAT ;
return encoding ;
} ;
/* 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)
{ psf_binheader_writef (psf, "Em4", DOTSND_MARKER, AU_DATA_OFFSET) ;
psf_binheader_writef (psf, "Et8444", psf->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, "et8444", psf->datalength, encoding, psf->sf.samplerate, psf->sf.channels) ;
}
else
{ psf->error = SFE_BAD_OPEN_FORMAT ;
return encoding ;
} ;
/* Header construction complete so write it out. */
psf_fwrite (psf->header, psf->headindex, 1, psf->filedes) ;
psf->dataoffset = psf->headindex ;
return encoding ;
} /* 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 ;
default : break ;
} ;
return 0 ;
} /* au_format_to_encoding */
static int
au_read_header (SF_PRIVATE *psf)
{ AU_FMT au_fmt ;
int marker, dword ;
psf_binheader_readf (psf, "pm", 0, &marker) ;
psf_log_printf (psf, "%D\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 (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.dataoffset ;
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_fseek (psf->filedes, psf->dataoffset, SEEK_SET) != psf->dataoffset)
return SFE_BAD_SEEK ;
psf->close = au_close ;
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_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.samples && psf->blockwidth)
psf->sf.samples = (psf->filelength - psf->dataoffset) / psf->blockwidth ;
return 0 ;
} /* au_read_header */