ref: 3a0e440fef1a9834cd377512485c407ec0213bce
dir: /common/libsndfile/src/aiff.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 <ctype.h>
#include "sndfile.h"
#include "config.h"
#include "sfendian.h"
#include "common.h"
#include "pcm.h"
/*------------------------------------------------------------------------------
* Macros to handle big/little endian issues.
*/
#if (CPU_IS_LITTLE_ENDIAN == 1)
#define MAKE_MARKER(a,b,c,d) ((a)|((b)<<8)|((c)<<16)|((d)<<24))
#elif (CPU_IS_BIG_ENDIAN == 1)
#define MAKE_MARKER(a,b,c,d) (((a)<<24)|((b)<<16)|((c)<<8)|(d))
#else
#error "Cannot determine endian-ness of processor."
#endif
#define FORM_MARKER (MAKE_MARKER ('F', 'O', 'R', 'M'))
#define AIFF_MARKER (MAKE_MARKER ('A', 'I', 'F', 'F'))
#define AIFC_MARKER (MAKE_MARKER ('A', 'I', 'F', 'C'))
#define COMM_MARKER (MAKE_MARKER ('C', 'O', 'M', 'M'))
#define SSND_MARKER (MAKE_MARKER ('S', 'S', 'N', 'D'))
#define MARK_MARKER (MAKE_MARKER ('M', 'A', 'R', 'K'))
#define INST_MARKER (MAKE_MARKER ('I', 'N', 'S', 'T'))
#define APPL_MARKER (MAKE_MARKER ('A', 'P', 'P', 'L'))
#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 FVER_MARKER (MAKE_MARKER ('F', 'V', 'E', 'R'))
#define NONE_MARKER (MAKE_MARKER ('N', 'O', 'N', 'E'))
#define REAL_COMM_SIZE (2+4+2+10)
/*------------------------------------------------------------------------------
* Typedefs for file chunks.
*/
typedef struct
{ short numChannels ;
unsigned int numSampleFrames ;
short sampleSize ;
unsigned char sampleRate [10] ;
} COMM_CHUNK ;
typedef struct
{ unsigned int offset ;
unsigned int blocksize ;
} SSND_CHUNK ;
typedef struct
{ short playMode;
int beginLoop;
int endLoop;
} INST_CHUNK ;
/*------------------------------------------------------------------------------
* Private static functions.
*/
static int aiff_close (SF_PRIVATE *psf) ;
static int tenbytefloat2int (unsigned char *bytes) ;
static void uint2tenbytefloat (unsigned int num, unsigned char *bytes) ;
static
void endswap_comm_fmt (COMM_CHUNK *comm)
{ comm->numChannels = ENDSWAP_SHORT (comm->numChannels) ;
comm->numSampleFrames = ENDSWAP_INT (comm->numSampleFrames) ;
comm->sampleSize = ENDSWAP_SHORT (comm->sampleSize) ;
} /* endswap_comm_fmt */
static
void endswap_ssnd_fmt (SSND_CHUNK *ssnd)
{ ssnd->offset = ENDSWAP_INT (ssnd->offset) ;
ssnd->blocksize = ENDSWAP_INT (ssnd->blocksize) ;
} /* endswap_ssnd_fmt */
/*------------------------------------------------------------------------------
** Public functions.
*/
int aiff_open_read (SF_PRIVATE *psf)
{ COMM_CHUNK comm_fmt ;
SSND_CHUNK ssnd_fmt ;
int marker, dword ;
long FORMsize, commsize, SSNDsize ;
int filetype, parsestage = 0, done = 0 ;
while (! done)
{ fread (&marker, sizeof (marker), 1, psf->file) ;
switch (marker)
{ case FORM_MARKER :
if (parsestage != 0)
return SFE_AIFF_NO_FORM ;
fread (&dword, sizeof (dword), 1, psf->file) ;
FORMsize = BE2H_INT (dword) ;
if (FORMsize != psf->filelength - 2 * sizeof (dword))
{ dword = psf->filelength - 2 * sizeof (dword);
psf_sprintf (psf, "FORM : %d (should be %d)\n", FORMsize, dword) ;
FORMsize = dword ;
}
else
psf_sprintf (psf, "FORM : %d\n", FORMsize) ;
parsestage = 1 ;
break ;
case AIFC_MARKER :
case AIFF_MARKER :
if (parsestage != 1)
return SFE_AIFF_NO_FORM ;
filetype = marker ;
psf_sprintf (psf, " %D\n", marker) ;
parsestage = 2 ;
break ;
case COMM_MARKER :
if (parsestage != 2)
return SFE_AIFF_NO_FORM ;
fread (&dword, sizeof (dword), 1, psf->file) ;
commsize = BE2H_INT (dword) ;
/* The COMM chunk has an int aligned to a word boundary. Some procesors
** are not able to deal with this (ie bus fault) so we have to take
** special care.
*/
fread (&(comm_fmt.numChannels), sizeof (comm_fmt.numChannels), 1, psf->file) ;
fread (&(comm_fmt.numSampleFrames), sizeof (comm_fmt.numSampleFrames), 1, psf->file) ;
fread (&(comm_fmt.sampleSize), sizeof (comm_fmt.sampleSize), 1, psf->file) ;
fread (&(comm_fmt.sampleRate), sizeof (comm_fmt.sampleRate), 1, psf->file) ;
if (CPU_IS_LITTLE_ENDIAN)
endswap_comm_fmt (&comm_fmt) ;
psf->sf.samplerate = tenbytefloat2int (comm_fmt.sampleRate) ;
psf->sf.samples = comm_fmt.numSampleFrames ;
psf->sf.channels = comm_fmt.numChannels ;
psf->sf.pcmbitwidth = comm_fmt.sampleSize ;
psf->sf.format = (SF_FORMAT_AIFF | SF_FORMAT_PCM);
psf->sf.sections = 1 ;
psf_sprintf (psf, " COMM : %d\n", commsize) ;
psf_sprintf (psf, " Sample Rate : %d\n", psf->sf.samplerate) ;
psf_sprintf (psf, " Samples : %d\n", comm_fmt.numSampleFrames) ;
psf_sprintf (psf, " Channels : %d\n", comm_fmt.numChannels) ;
psf_sprintf (psf, " Sample Size : %d\n", comm_fmt.sampleSize) ;
if (commsize > REAL_COMM_SIZE)
{ fread (&dword, sizeof (dword), 1, psf->file) ;
if (dword != NONE_MARKER)
{ psf_sprintf (psf, "AIFC : Unimplemented format : %D\n", dword) ;
return SFE_UNIMPLEMENTED ;
} ;
fseek (psf->file, commsize - (long) (sizeof (dword) + REAL_COMM_SIZE), SEEK_CUR) ;
} ;
parsestage = 3 ;
break ;
case SSND_MARKER :
if (parsestage != 3)
return SFE_AIFF_NO_SSND ;
fread (&dword, sizeof (dword), 1, psf->file) ;
SSNDsize = BE2H_INT (dword) ;
fread (&ssnd_fmt, sizeof (SSND_CHUNK), 1, psf->file) ;
if (CPU_IS_LITTLE_ENDIAN)
endswap_ssnd_fmt (&ssnd_fmt) ;
psf->dataoffset = ftell (psf->file) ;
psf->datalength = psf->filelength - psf->dataoffset ;
if (SSNDsize != psf->datalength + sizeof (SSND_CHUNK))
psf_sprintf (psf, " SSND : %d (should be %d)\n", SSNDsize, psf->datalength + sizeof (SSND_CHUNK)) ;
else
psf_sprintf (psf, " SSND : %d\n", SSNDsize) ;
psf_sprintf (psf, " Offset : %d\n", ssnd_fmt.offset) ;
psf_sprintf (psf, " Block Size : %d\n", ssnd_fmt.blocksize) ;
fseek (psf->file, psf->datalength, SEEK_CUR) ;
dword = ftell (psf->file) ;
if (dword != (off_t) (psf->dataoffset + psf->datalength))
psf_sprintf (psf, "*** fseek past end error ***\n", dword, psf->dataoffset + psf->datalength) ;
parsestage = 4 ;
break ;
case NAME_MARKER :
case AUTH_MARKER :
case ANNO_MARKER :
case c_MARKER :
case FVER_MARKER :
if (parsestage < 2)
return SFE_AIFF_NO_FORM ;
fread (&dword, sizeof (dword), 1, psf->file) ;
dword = BE2H_INT (dword) ;
psf_sprintf (psf, " %D : %d\n", marker, dword) ;
fseek (psf->file, dword, SEEK_CUR) ;
break ;
case MARK_MARKER :
case INST_MARKER :
case APPL_MARKER :
if (parsestage < 2)
return SFE_AIFF_NO_FORM ;
fread (&dword, sizeof (dword), 1, psf->file) ;
dword = BE2H_INT (dword) ;
psf_sprintf (psf, " %D : %d\n", marker, dword) ;
fseek (psf->file, dword, SEEK_CUR) ;
break ;
default :
if (isprint ((marker >> 24) & 0xFF) && isprint ((marker >> 16) & 0xFF)
&& isprint ((marker >> 8) & 0xFF) && isprint (marker & 0xFF))
{ fread (&dword, sizeof (dword), 1, psf->file) ;
psf_sprintf (psf, "%D : %d (unknown marker)\n", marker, dword) ;
fseek (psf->file, dword, SEEK_CUR) ;
break ;
} ;
if ((dword = ftell (psf->file)) & 0x03)
{ psf_sprintf (psf, " Unknown chunk marker at position %d. Resynching.\n", dword - 4) ;
fseek (psf->file, -3, SEEK_CUR) ;
break ;
} ;
psf_sprintf (psf, "*** Unknown chunk marker : %X. Exiting parser.\n", marker) ;
done = 1 ;
break ;
} ; /* switch (marker) */
if (ferror (psf->file))
{ psf_sprintf (psf, "*** Error on file handle. ***\n") ;
clearerr (psf->file) ;
break ;
} ;
if (ftell (psf->file) >= (off_t) (psf->filelength - (2 * sizeof (dword))))
break ;
} ; /* while (1) */
if (! psf->dataoffset)
return SFE_AIFF_NO_DATA ;
psf->current = 0 ;
psf->endian = SF_ENDIAN_BIG ; /* All AIF* files are big endian. */
psf->sf.seekable = SF_TRUE ;
psf->bytewidth = BITWIDTH2BYTES (psf->sf.pcmbitwidth) ;
psf->blockwidth = psf->sf.channels * psf->bytewidth ;
fseek (psf->file, psf->dataoffset, SEEK_SET) ;
psf->close = (func_close) aiff_close ;
switch (psf->bytewidth)
{ case 1 :
psf->read_short = (func_short) pcm_read_sc2s ;
psf->read_int = (func_int) pcm_read_sc2i ;
psf->read_double = (func_double) pcm_read_sc2d ;
break ;
case 2 :
psf->read_short = (func_short) pcm_read_bes2s ;
psf->read_int = (func_int) pcm_read_bes2i ;
psf->read_double = (func_double) pcm_read_bes2d ;
break ;
case 3 :
psf->read_short = (func_short) pcm_read_bet2s ;
psf->read_int = (func_int) pcm_read_bet2i ;
psf->read_double = (func_double) pcm_read_bet2d ;
break ;
case 4 :
psf->read_short = (func_short) pcm_read_bei2s ;
psf->read_int = (func_int) pcm_read_bei2i ;
psf->read_double = (func_double) pcm_read_bei2d ;
break ;
default :
/* printf ("Weird bytewidth (%d)\n", psf->bytewidth) ; */
return SFE_UNIMPLEMENTED ;
} ;
return 0 ;
} /* aiff_open_read */
/*------------------------------------------------------------------------------
*/
int aiff_open_write (SF_PRIVATE *psf)
{ COMM_CHUNK comm_fmt ;
SSND_CHUNK ssnd_fmt ;
unsigned int dword, FORMsize ;
if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_AIFF)
return SFE_BAD_OPEN_FORMAT ;
if ((psf->sf.format & SF_FORMAT_SUBMASK) != SF_FORMAT_PCM)
return SFE_BAD_OPEN_FORMAT ;
psf->endian = SF_ENDIAN_BIG ; /* All AIF* files are big endian. */
psf->sf.seekable = SF_TRUE ;
psf->bytewidth = BITWIDTH2BYTES (psf->sf.pcmbitwidth) ;
psf->blockwidth = psf->bytewidth * psf->sf.channels ;
psf->dataoffset = 5 * sizeof (dword) + REAL_COMM_SIZE + 4 * sizeof (dword) ;
psf->datalength = psf->blockwidth * psf->sf.samples ;
psf->filelength = psf->datalength + psf->dataoffset ;
psf->error = 0 ;
FORMsize = 0x7FFFFFFF ; /* Correct this when closing file. */
comm_fmt.numChannels = psf->sf.channels ;
comm_fmt.numSampleFrames = psf->sf.samples ;
comm_fmt.sampleSize = psf->sf.pcmbitwidth ;
uint2tenbytefloat (psf->sf.samplerate, comm_fmt.sampleRate) ;
if (CPU_IS_LITTLE_ENDIAN)
endswap_comm_fmt (&comm_fmt) ;
ssnd_fmt.offset = 0 ;
ssnd_fmt.blocksize = 0 ; /* Not normally used. */
if (CPU_IS_LITTLE_ENDIAN)
endswap_ssnd_fmt (&ssnd_fmt) ;
dword = FORM_MARKER ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
dword = H2BE_INT (FORMsize) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
dword = AIFF_MARKER ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
dword = COMM_MARKER ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
dword = H2BE_INT (REAL_COMM_SIZE) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
fwrite (&(comm_fmt.numChannels), sizeof (comm_fmt.numChannels), 1, psf->file) ;
fwrite (&(comm_fmt.numSampleFrames), sizeof (comm_fmt.numSampleFrames), 1, psf->file) ;
fwrite (&(comm_fmt.sampleSize), sizeof (comm_fmt.sampleSize), 1, psf->file) ;
fwrite (&(comm_fmt.sampleRate), sizeof (comm_fmt.sampleRate), 1, psf->file) ;
dword = SSND_MARKER ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
dword = H2BE_INT (psf->datalength + sizeof (SSND_CHUNK)) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ;
fwrite (&ssnd_fmt, sizeof (ssnd_fmt), 1, psf->file) ;
psf->close = (func_close) aiff_close ;
switch (psf->bytewidth)
{ case 1 :
psf->write_short = (func_short) pcm_write_s2sc ;
psf->write_int = (func_int) pcm_write_i2sc ;
psf->write_double = (func_double) pcm_write_d2sc ;
break ;
case 2 :
psf->write_short = (func_short) pcm_write_s2bes ;
psf->write_int = (func_int) pcm_write_i2bes ;
psf->write_double = (func_double) pcm_write_d2bes ;
break ;
case 3 :
psf->write_short = (func_short) pcm_write_s2bet ;
psf->write_int = (func_int) pcm_write_i2bet ;
psf->write_double = (func_double) pcm_write_d2bet ;
break ;
case 4 :
psf->write_short = (func_short) pcm_write_s2bei ;
psf->write_int = (func_int) pcm_write_i2bei ;
psf->write_double = (func_double) pcm_write_d2bei ;
break ;
default : return SFE_UNIMPLEMENTED ;
} ;
return 0 ;
} /* aiff_open_write */
/*------------------------------------------------------------------------------
*/
int aiff_close (SF_PRIVATE *psf)
{ unsigned int dword ;
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, COMM and SSND chunks.
*/
fseek (psf->file, 0, SEEK_END) ;
psf->filelength = ftell (psf->file) ;
dword = psf->filelength - 2 * sizeof (dword) ;
fseek (psf->file, sizeof (dword), SEEK_SET) ;
dword = H2BE_INT (dword) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ; /* FORM */
fseek (psf->file, psf->dataoffset - (long)((sizeof (SSND_CHUNK) + sizeof (dword))), SEEK_SET) ;
psf->datalength = psf->filelength - psf->dataoffset ;
dword = H2BE_INT (psf->datalength + sizeof (SSND_CHUNK)) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ; /* SSND */
fseek (psf->file, 5 * sizeof (dword) + sizeof (short), SEEK_SET) ;
dword = psf->datalength / (psf->bytewidth * psf->sf.channels) ;
dword = H2BE_INT (dword) ;
fwrite (&dword, sizeof (dword), 1, psf->file) ; /* COMM.numSampleFrames */
} ;
if (psf->fdata)
free (psf->fdata) ;
psf->fdata = NULL ;
return 0 ;
} /* aiff_close */
/*==========================================================================================
** Rough hack at converting from 80 bit IEEE float in AIFF header to an int and
** back again. It assumes that all sample rates are between 1 and 800MHz, which
** should be OK as other sound file formats use a 32 bit integer to store sample
** rate.
** There is another (probably better) version in the source code to the SoX but it
** has a copyright which probably prevents it from being allowable as GPL/LGPL.
*/
static
int tenbytefloat2int (unsigned char *bytes)
{ int val = 3 ;
if (bytes [0] & 0x80) /* Negative number. */
return 0 ;
if (bytes [0] <= 0x3F) /* Less than 1. */
return 1 ;
if (bytes [0] > 0x40) /* Way too big. */
return 0x4000000 ;
if (bytes [0] == 0x40 && bytes [1] > 0x1C) /* Too big. */
return 800000000 ;
/* Ok, can handle it. */
val = (bytes [2] << 23) | (bytes [3] << 15) | (bytes [4] << 7) | (bytes [5] >> 1) ;
val >>= (29 - bytes [1]) ;
return val ;
} /* tenbytefloat2int */
static
void uint2tenbytefloat (unsigned int num, unsigned char *bytes)
{ int count, mask = 0x40000000 ;
memset (bytes, 0, 10) ;
if (num <= 1)
{ bytes [0] = 0x3F ;
bytes [1] = 0xFF ;
bytes [2] = 0x80 ;
return ;
} ;
bytes [0] = 0x40 ;
if (num >= mask)
{ bytes [1] = 0x1D ;
return ;
} ;
for (count = 0 ; count <= 32 ; count ++)
{ if (num & mask)
break ;
mask >>= 1 ;
} ;
num <<= count + 1 ;
bytes [1] = 29 - count ;
bytes [2] = (num >> 24) & 0xFF ;
bytes [3] = (num >> 16) & 0xFF ;
bytes [4] = (num >> 8) & 0xFF ;
bytes [5] = num & 0xFF ;
} /* uint2tenbytefloat */