/*
** Copyright (C) 2002-2016 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 <math.h>
#include "sndfile.h"
#include "sfendian.h"
#include "common.h"
/*------------------------------------------------------------------------------
** Information on how to decode and encode this file was obtained in a PDF
** file which I found on http://www.wotsit.org/.
** Also did a lot of testing with GNU Octave but do not have access to
** Matlab (tm) and so could not test it there.
*/
/*------------------------------------------------------------------------------
** Macros to handle big/little endian issues.
*/
#define MAT4_BE_DOUBLE (MAKE_MARKER (0, 0, 0x03, 0xE8))
#define MAT4_LE_DOUBLE (MAKE_MARKER (0, 0, 0, 0))
#define MAT4_BE_FLOAT (MAKE_MARKER (0, 0, 0x03, 0xF2))
#define MAT4_LE_FLOAT (MAKE_MARKER (0x0A, 0, 0, 0))
#define MAT4_BE_PCM_32 (MAKE_MARKER (0, 0, 0x03, 0xFC))
#define MAT4_LE_PCM_32 (MAKE_MARKER (0x14, 0, 0, 0))
#define MAT4_BE_PCM_16 (MAKE_MARKER (0, 0, 0x04, 0x06))
#define MAT4_LE_PCM_16 (MAKE_MARKER (0x1E, 0, 0, 0))
/* Can't see any reason to ever implement this. */
#define MAT4_BE_PCM_U8 (MAKE_MARKER (0, 0, 0x04, 0x1A))
#define MAT4_LE_PCM_U8 (MAKE_MARKER (0x32, 0, 0, 0))
/*------------------------------------------------------------------------------
** Private static functions.
*/
static int mat4_close (SF_PRIVATE *psf) ;
static int mat4_format_to_encoding (int format, int endian) ;
static int mat4_write_header (SF_PRIVATE *psf, int calc_length) ;
static int mat4_read_header (SF_PRIVATE *psf) ;
static const char * mat4_marker_to_str (int marker) ;
/*------------------------------------------------------------------------------
** Public function.
*/
int
mat4_open (SF_PRIVATE *psf)
{ int subformat, error = 0 ;
if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
{ if ((error = mat4_read_header (psf)))
return error ;
} ;
if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_MAT4)
return SFE_BAD_OPEN_FORMAT ;
subformat = SF_CODEC (psf->sf.format) ;
if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
{ if (psf->is_pipe)
return SFE_NO_PIPE_WRITE ;
psf->endian = SF_ENDIAN (psf->sf.format) ;
if (CPU_IS_LITTLE_ENDIAN && (psf->endian == SF_ENDIAN_CPU || psf->endian == 0))
psf->endian = SF_ENDIAN_LITTLE ;
else if (CPU_IS_BIG_ENDIAN && (psf->endian == SF_ENDIAN_CPU || psf->endian == 0))
psf->endian = SF_ENDIAN_BIG ;
if ((error = mat4_write_header (psf, SF_FALSE)))
return error ;
psf->write_header = mat4_write_header ;
} ;
psf->container_close = mat4_close ;
psf->blockwidth = psf->bytewidth * psf->sf.channels ;
switch (subformat)
{ case SF_FORMAT_PCM_16 :
case SF_FORMAT_PCM_32 :
error = pcm_init (psf) ;
break ;
case SF_FORMAT_FLOAT :
error = float32_init (psf) ;
break ;
case SF_FORMAT_DOUBLE :
error = double64_init (psf) ;
break ;
default : break ;
} ;
return error ;
} /* mat4_open */
/*------------------------------------------------------------------------------
*/
static int
mat4_close (SF_PRIVATE *psf)
{
if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
mat4_write_header (psf, SF_TRUE) ;
return 0 ;
} /* mat4_close */
/*------------------------------------------------------------------------------
*/
static int
mat4_write_header (SF_PRIVATE *psf, int calc_length)
{ sf_count_t current ;
int encoding ;
double samplerate ;
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 = mat4_format_to_encoding (SF_CODEC (psf->sf.format), psf->endian) ;
if (encoding == -1)
return SFE_BAD_OPEN_FORMAT ;
/* Reset the current header length to zero. */
psf->header.ptr [0] = 0 ;
psf->header.indx = 0 ;
psf_fseek (psf, 0, SEEK_SET) ;
/* Need sample rate as a double for writing to the header. */
samplerate = psf->sf.samplerate ;
if (psf->endian == SF_ENDIAN_BIG)
{ psf_binheader_writef (psf, "Em444", MAT4_BE_DOUBLE, 1, 1, 0) ;
psf_binheader_writef (psf, "E4bd", 11, "samplerate", make_size_t (11), samplerate) ;
psf_binheader_writef (psf, "tEm484", encoding, psf->sf.channels, psf->sf.frames, 0) ;
psf_binheader_writef (psf, "E4b", 9, "wavedata", make_size_t (9)) ;
}
else if (psf->endian == SF_ENDIAN_LITTLE)
{ psf_binheader_writef (psf, "em444", MAT4_LE_DOUBLE, 1, 1, 0) ;
psf_binheader_writef (psf, "e4bd", 11, "samplerate", make_size_t (11), samplerate) ;
psf_binheader_writef (psf, "tem484", encoding, psf->sf.channels, psf->sf.frames, 0) ;
psf_binheader_writef (psf, "e4b", 9, "wavedata", make_size_t (9)) ;
}
else
return SFE_BAD_OPEN_FORMAT ;
/* Header construction complete so write it out. */
psf_fwrite (psf->header.ptr, psf->header.indx, 1, psf) ;
if (psf->error)
return psf->error ;
psf->dataoffset = psf->header.indx ;
if (current > 0)
psf_fseek (psf, current, SEEK_SET) ;
return psf->error ;
} /* mat4_write_header */
static int
mat4_read_header (SF_PRIVATE *psf)
{ char buffer [256] ;
uint32_t marker, namesize ;
int rows, cols, imag ;
double value ;
const char *marker_str ;
char name [64] ;
psf_binheader_readf (psf, "pm", 0, &marker) ;
/* MAT4 file must start with a double for the samplerate. */
if (marker == MAT4_BE_DOUBLE)
{ psf->endian = psf->rwf_endian = SF_ENDIAN_BIG ;
marker_str = "big endian double" ;
}
else if (marker == MAT4_LE_DOUBLE)
{ psf->endian = psf->rwf_endian = SF_ENDIAN_LITTLE ;
marker_str = "little endian double" ;
}
else
return SFE_UNIMPLEMENTED ;
psf_log_printf (psf, "GNU Octave 2.0 / MATLAB v4.2 format\nMarker : %s\n", marker_str) ;
psf_binheader_readf (psf, "444", &rows, &cols, &imag) ;
psf_log_printf (psf, " Rows : %d\n Cols : %d\n Imag : %s\n", rows, cols, imag ? "True" : "False") ;
psf_binheader_readf (psf, "4", &namesize) ;
if (namesize >= SIGNED_SIZEOF (name))
return SFE_MAT4_BAD_NAME ;
psf_binheader_readf (psf, "b", name, namesize) ;
name [namesize] = 0 ;
psf_log_printf (psf, " Name : %s\n", name) ;
psf_binheader_readf (psf, "d", &value) ;
snprintf (buffer, sizeof (buffer), " Value : %f\n", value) ;
psf_log_printf (psf, buffer) ;
if ((rows != 1) || (cols != 1))
return SFE_MAT4_NO_SAMPLERATE ;
psf->sf.samplerate = lrint (value) ;
/* Now write out the audio data. */
psf_binheader_readf (psf, "m", &marker) ;
psf_log_printf (psf, "Marker : %s\n", mat4_marker_to_str (marker)) ;
psf_binheader_readf (psf, "444", &rows, &cols, &imag) ;
psf_log_printf (psf, " Rows : %d\n Cols : %d\n Imag : %s\n", rows, cols, imag ? "True" : "False") ;
psf_binheader_readf (psf, "4", &namesize) ;
if (namesize >= SIGNED_SIZEOF (name))
return SFE_MAT4_BAD_NAME ;
psf_binheader_readf (psf, "b", name, namesize) ;
name [namesize] = 0 ;
psf_log_printf (psf, " Name : %s\n", name) ;
psf->dataoffset = psf_ftell (psf) ;
if (rows == 0)
{ psf_log_printf (psf, "*** Error : zero channel count.\n") ;
return SFE_CHANNEL_COUNT_ZERO ;
}
else if (rows > SF_MAX_CHANNELS)
{ psf_log_printf (psf, "*** Error : channel count %d > SF_MAX_CHANNELS.\n", rows) ;
return SFE_CHANNEL_COUNT ;
} ;
psf->sf.channels = rows ;
psf->sf.frames = cols ;
psf->sf.format = psf->endian | SF_FORMAT_MAT4 ;
switch (marker)
{ case MAT4_BE_DOUBLE :
case MAT4_LE_DOUBLE :
psf->sf.format |= SF_FORMAT_DOUBLE ;
psf->bytewidth = 8 ;
break ;
case MAT4_BE_FLOAT :
case MAT4_LE_FLOAT :
psf->sf.format |= SF_FORMAT_FLOAT ;
psf->bytewidth = 4 ;
break ;
case MAT4_BE_PCM_32 :
case MAT4_LE_PCM_32 :
psf->sf.format |= SF_FORMAT_PCM_32 ;
psf->bytewidth = 4 ;
break ;
case MAT4_BE_PCM_16 :
case MAT4_LE_PCM_16 :
psf->sf.format |= SF_FORMAT_PCM_16 ;
psf->bytewidth = 2 ;
break ;
default :
psf_log_printf (psf, "*** Error : Bad marker %08X\n", marker) ;
return SFE_UNIMPLEMENTED ;
} ;
if ((psf->filelength - psf->dataoffset) < psf->sf.channels * psf->sf.frames * psf->bytewidth)
{ psf_log_printf (psf, "*** File seems to be truncated. %D <--> %D\n",
psf->filelength - psf->dataoffset, psf->sf.channels * psf->sf.frames * psf->bytewidth) ;
}
else if ((psf->filelength - psf->dataoffset) > psf->sf.channels * psf->sf.frames * psf->bytewidth)
psf->dataend = psf->dataoffset + rows * cols * psf->bytewidth ;
psf->datalength = psf->filelength - psf->dataoffset - psf->dataend ;
psf->sf.sections = 1 ;
return 0 ;
} /* mat4_read_header */
static int
mat4_format_to_encoding (int format, int endian)
{
switch (format | endian)
{ case (SF_FORMAT_PCM_16 | SF_ENDIAN_BIG) :
return MAT4_BE_PCM_16 ;
case (SF_FORMAT_PCM_16 | SF_ENDIAN_LITTLE) :
return MAT4_LE_PCM_16 ;
case (SF_FORMAT_PCM_32 | SF_ENDIAN_BIG) :
return MAT4_BE_PCM_32 ;
case (SF_FORMAT_PCM_32 | SF_ENDIAN_LITTLE) :
return MAT4_LE_PCM_32 ;
case (SF_FORMAT_FLOAT | SF_ENDIAN_BIG) :
return MAT4_BE_FLOAT ;
case (SF_FORMAT_FLOAT | SF_ENDIAN_LITTLE) :
return MAT4_LE_FLOAT ;
case (SF_FORMAT_DOUBLE | SF_ENDIAN_BIG) :
return MAT4_BE_DOUBLE ;
case (SF_FORMAT_DOUBLE | SF_ENDIAN_LITTLE) :
return MAT4_LE_DOUBLE ;
default : break ;
} ;
return -1 ;
} /* mat4_format_to_encoding */
static const char *
mat4_marker_to_str (int marker)
{ static char str [32] ;
switch (marker)
{
case MAT4_BE_PCM_16 : return "big endian 16 bit PCM" ;
case MAT4_LE_PCM_16 : return "little endian 16 bit PCM" ;
case MAT4_BE_PCM_32 : return "big endian 32 bit PCM" ;
case MAT4_LE_PCM_32 : return "little endian 32 bit PCM" ;
case MAT4_BE_FLOAT : return "big endian float" ;
case MAT4_LE_FLOAT : return "big endian float" ;
case MAT4_BE_DOUBLE : return "big endian double" ;
case MAT4_LE_DOUBLE : return "little endian double" ;
} ;
/* This is a little unsafe but is really only for debugging. */
str [sizeof (str) - 1] = 0 ;
snprintf (str, sizeof (str) - 1, "%08X", marker) ;
return str ;
} /* mat4_marker_to_str */