/*
** 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 MATL_MARKER (MAKE_MARKER ('M', 'A', 'T', 'L'))
#define IM_MARKER (('I' << 8) + 'M')
#define MI_MARKER (('M' << 8) + 'I')
/*------------------------------------------------------------------------------
** Enums and typedefs.
*/
enum
{ MAT5_TYPE_SCHAR = 0x1,
MAT5_TYPE_UCHAR = 0x2,
MAT5_TYPE_INT16 = 0x3,
MAT5_TYPE_UINT16 = 0x4,
MAT5_TYPE_INT32 = 0x5,
MAT5_TYPE_UINT32 = 0x6,
MAT5_TYPE_FLOAT = 0x7,
MAT5_TYPE_DOUBLE = 0x9,
MAT5_TYPE_ARRAY = 0xE,
MAT5_TYPE_COMP_USHORT = 0x00020004,
MAT5_TYPE_COMP_UINT = 0x00040006
} ;
typedef struct
{ sf_count_t size ;
int rows, cols ;
char name [32] ;
} MAT5_MATRIX ;
/*------------------------------------------------------------------------------
** Private static functions.
*/
static int mat5_close (SF_PRIVATE *psf) ;
static int mat5_write_header (SF_PRIVATE *psf, int calc_length) ;
static int mat5_read_header (SF_PRIVATE *psf) ;
/*------------------------------------------------------------------------------
** Public function.
*/
int
mat5_open (SF_PRIVATE *psf)
{ int subformat, error = 0 ;
if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
{ if ((error = mat5_read_header (psf)))
return error ;
} ;
if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_MAT5)
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 = mat5_write_header (psf, SF_FALSE)))
return error ;
psf->write_header = mat5_write_header ;
} ;
psf->container_close = mat5_close ;
psf->blockwidth = psf->bytewidth * psf->sf.channels ;
switch (subformat)
{ case SF_FORMAT_PCM_U8 :
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 ;
} /* mat5_open */
/*------------------------------------------------------------------------------
*/
static int
mat5_close (SF_PRIVATE *psf)
{
if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
mat5_write_header (psf, SF_TRUE) ;
return 0 ;
} /* mat5_close */
/*------------------------------------------------------------------------------
*/
static int
mat5_write_header (SF_PRIVATE *psf, int calc_length)
{ static const char *filename = "MATLAB 5.0 MAT-file, written by " PACKAGE_NAME "-" PACKAGE_VERSION ", " ;
static const char *sr_name = "samplerate\0\0\0\0\0\0\0\0\0\0\0" ;
static const char *wd_name = "wavedata\0" ;
char buffer [256] ;
sf_count_t current, datasize ;
int encoding ;
current = psf_ftell (psf) ;
if (calc_length)
{ psf_fseek (psf, 0, SEEK_END) ;
psf->filelength = psf_ftell (psf) ;
psf_fseek (psf, 0, SEEK_SET) ;
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) ;
} ;
switch (SF_CODEC (psf->sf.format))
{ case SF_FORMAT_PCM_U8 :
encoding = MAT5_TYPE_UCHAR ;
break ;
case SF_FORMAT_PCM_16 :
encoding = MAT5_TYPE_INT16 ;
break ;
case SF_FORMAT_PCM_32 :
encoding = MAT5_TYPE_INT32 ;
break ;
case SF_FORMAT_FLOAT :
encoding = MAT5_TYPE_FLOAT ;
break ;
case SF_FORMAT_DOUBLE :
encoding = MAT5_TYPE_DOUBLE ;
break ;
default :
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) ;
psf_get_date_str (buffer, sizeof (buffer)) ;
psf_binheader_writef (psf, "bb", filename, strlen (filename), buffer, strlen (buffer) + 1) ;
memset (buffer, ' ', 124 - psf->header.indx) ;
psf_binheader_writef (psf, "b", buffer, make_size_t (124 - psf->header.indx)) ;
psf->rwf_endian = psf->endian ;
if (psf->rwf_endian == SF_ENDIAN_BIG)
psf_binheader_writef (psf, "2b", 0x0100, "MI", make_size_t (2)) ;
else
psf_binheader_writef (psf, "2b", 0x0100, "IM", make_size_t (2)) ;
psf_binheader_writef (psf, "444444", MAT5_TYPE_ARRAY, 64, MAT5_TYPE_UINT32, 8, 6, 0) ;
psf_binheader_writef (psf, "4444", MAT5_TYPE_INT32, 8, 1, 1) ;
psf_binheader_writef (psf, "44b", MAT5_TYPE_SCHAR, strlen (sr_name), sr_name, make_size_t (16)) ;
if (psf->sf.samplerate > 0xFFFF)
psf_binheader_writef (psf, "44", MAT5_TYPE_COMP_UINT, psf->sf.samplerate) ;
else
{ unsigned short samplerate = psf->sf.samplerate ;
psf_binheader_writef (psf, "422", MAT5_TYPE_COMP_USHORT, samplerate, 0) ;
} ;
datasize = psf->sf.frames * psf->sf.channels * psf->bytewidth ;
psf_binheader_writef (psf, "t484444", MAT5_TYPE_ARRAY, datasize + 64, MAT5_TYPE_UINT32, 8, 6, 0) ;
psf_binheader_writef (psf, "t4448", MAT5_TYPE_INT32, 8, psf->sf.channels, psf->sf.frames) ;
psf_binheader_writef (psf, "44b", MAT5_TYPE_SCHAR, strlen (wd_name), wd_name, strlen (wd_name)) ;
datasize = psf->sf.frames * psf->sf.channels * psf->bytewidth ;
if (datasize > 0x7FFFFFFF)
datasize = 0x7FFFFFFF ;
psf_binheader_writef (psf, "t48", encoding, datasize) ;
/* 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 ;
} /* mat5_write_header */
static int
mat5_read_header (SF_PRIVATE *psf)
{ char buffer [256], name [32] ;
short version, endian ;
int type, flags1, flags2, rows, cols ;
unsigned size ;
int have_samplerate = 1 ;
psf_binheader_readf (psf, "pb", 0, buffer, 124) ;
buffer [125] = 0 ;
if (strlen (buffer) >= 124)
return SFE_UNIMPLEMENTED ;
if (strstr (buffer, "MATLAB 5.0 MAT-file") == buffer)
psf_log_printf (psf, "%s\n", buffer) ;
psf_binheader_readf (psf, "E22", &version, &endian) ;
if (endian == MI_MARKER)
{ psf->endian = psf->rwf_endian = SF_ENDIAN_BIG ;
if (CPU_IS_LITTLE_ENDIAN) version = ENDSWAP_16 (version) ;
}
else if (endian == IM_MARKER)
{ psf->endian = psf->rwf_endian = SF_ENDIAN_LITTLE ;
if (CPU_IS_BIG_ENDIAN) version = ENDSWAP_16 (version) ;
}
else
return SFE_MAT5_BAD_ENDIAN ;
if ((CPU_IS_LITTLE_ENDIAN && endian == IM_MARKER) ||
(CPU_IS_BIG_ENDIAN && endian == MI_MARKER))
version = ENDSWAP_16 (version) ;
psf_log_printf (psf, "Version : 0x%04X\n", version) ;
psf_log_printf (psf, "Endian : 0x%04X => %s\n", endian,
(psf->endian == SF_ENDIAN_LITTLE) ? "Little" : "Big") ;
/*========================================================*/
psf_binheader_readf (psf, "44", &type, &size) ;
psf_log_printf (psf, "Block\n Type : %X Size : %d\n", type, size) ;
if (type != MAT5_TYPE_ARRAY)
return SFE_MAT5_NO_BLOCK ;
psf_binheader_readf (psf, "44", &type, &size) ;
psf_log_printf (psf, " Type : %X Size : %d\n", type, size) ;
if (type != MAT5_TYPE_UINT32)
return SFE_MAT5_NO_BLOCK ;
psf_binheader_readf (psf, "44", &flags1, &flags2) ;
psf_log_printf (psf, " Flg1 : %X Flg2 : %d\n", flags1, flags2) ;
psf_binheader_readf (psf, "44", &type, &size) ;
psf_log_printf (psf, " Type : %X Size : %d\n", type, size) ;
if (type != MAT5_TYPE_INT32)
return SFE_MAT5_NO_BLOCK ;
psf_binheader_readf (psf, "44", &rows, &cols) ;
psf_log_printf (psf, " Rows : %d Cols : %d\n", rows, cols) ;
if (rows != 1 || cols != 1)
{ if (psf->sf.samplerate == 0)
psf->sf.samplerate = 44100 ;
have_samplerate = 0 ;
}
psf_binheader_readf (psf, "4", &type) ;
if (type == MAT5_TYPE_SCHAR)
{ psf_binheader_readf (psf, "4", &size) ;
psf_log_printf (psf, " Type : %X Size : %d\n", type, size) ;
if (size > SIGNED_SIZEOF (name) - 1)
{ psf_log_printf (psf, "Error : Bad name length.\n") ;
return SFE_MAT5_NO_BLOCK ;
} ;
psf_binheader_readf (psf, "bj", name, size, (8 - (size % 8)) % 8) ;
name [size] = 0 ;
}
else if ((type & 0xFFFF) == MAT5_TYPE_SCHAR)
{ size = type >> 16 ;
if (size > 4)
{ psf_log_printf (psf, "Error : Bad name length.\n") ;
return SFE_MAT5_NO_BLOCK ;
} ;
psf_log_printf (psf, " Type : %X\n", type) ;
psf_binheader_readf (psf, "4", &name) ;
name [size] = 0 ;
}
else
return SFE_MAT5_NO_BLOCK ;
psf_log_printf (psf, " Name : %s\n", name) ;
/*-----------------------------------------*/
psf_binheader_readf (psf, "44", &type, &size) ;
if (!have_samplerate)
goto skip_samplerate ;
switch (type)
{ case MAT5_TYPE_DOUBLE :
{ double samplerate ;
psf_binheader_readf (psf, "d", &samplerate) ;
snprintf (name, sizeof (name), "%f\n", samplerate) ;
psf_log_printf (psf, " Val : %s\n", name) ;
psf->sf.samplerate = lrint (samplerate) ;
} ;
break ;
case MAT5_TYPE_COMP_USHORT :
{ unsigned short samplerate ;
psf_binheader_readf (psf, "j2j", -4, &samplerate, 2) ;
psf_log_printf (psf, " Val : %u\n", samplerate) ;
psf->sf.samplerate = samplerate ;
}
break ;
case MAT5_TYPE_COMP_UINT :
psf_log_printf (psf, " Val : %u\n", size) ;
psf->sf.samplerate = size ;
break ;
default :
psf_log_printf (psf, " Type : %X Size : %d ***\n", type, size) ;
return SFE_MAT5_SAMPLE_RATE ;
} ;
/*-----------------------------------------*/
psf_binheader_readf (psf, "44", &type, &size) ;
psf_log_printf (psf, " Type : %X Size : %d\n", type, size) ;
if (type != MAT5_TYPE_ARRAY)
return SFE_MAT5_NO_BLOCK ;
psf_binheader_readf (psf, "44", &type, &size) ;
psf_log_printf (psf, " Type : %X Size : %d\n", type, size) ;
if (type != MAT5_TYPE_UINT32)
return SFE_MAT5_NO_BLOCK ;
psf_binheader_readf (psf, "44", &flags1, &flags2) ;
psf_log_printf (psf, " Flg1 : %X Flg2 : %d\n", flags1, flags2) ;
psf_binheader_readf (psf, "44", &type, &size) ;
psf_log_printf (psf, " Type : %X Size : %d\n", type, size) ;
if (type != MAT5_TYPE_INT32)
return SFE_MAT5_NO_BLOCK ;
psf_binheader_readf (psf, "44", &rows, &cols) ;
psf_log_printf (psf, " Rows : %X Cols : %d\n", rows, cols) ;
psf_binheader_readf (psf, "4", &type) ;
if (type == MAT5_TYPE_SCHAR)
{ psf_binheader_readf (psf, "4", &size) ;
psf_log_printf (psf, " Type : %X Size : %d\n", type, size) ;
if (size > SIGNED_SIZEOF (name) - 1)
{ psf_log_printf (psf, "Error : Bad name length.\n") ;
return SFE_MAT5_NO_BLOCK ;
} ;
psf_binheader_readf (psf, "bj", name, size, (8 - (size % 8)) % 8) ;
name [size] = 0 ;
}
else if ((type & 0xFFFF) == MAT5_TYPE_SCHAR)
{ size = type >> 16 ;
if (size > 4)
{ psf_log_printf (psf, "Error : Bad name length.\n") ;
return SFE_MAT5_NO_BLOCK ;
} ;
psf_log_printf (psf, " Type : %X\n", type) ;
psf_binheader_readf (psf, "4", &name) ;
name [size] = 0 ;
}
else
return SFE_MAT5_NO_BLOCK ;
psf_log_printf (psf, " Name : %s\n", name) ;
psf_binheader_readf (psf, "44", &type, &size) ;
psf_log_printf (psf, " Type : %X Size : %d\n", type, size) ;
skip_samplerate :
/*++++++++++++++++++++++++++++++++++++++++++++++++++*/
if (rows == 0 && cols == 0)
{ psf_log_printf (psf, "*** Error : zero channel count.\n") ;
return SFE_CHANNEL_COUNT_ZERO ;
} ;
psf->sf.channels = rows ;
psf->sf.frames = cols ;
psf->sf.format = psf->endian | SF_FORMAT_MAT5 ;
switch (type)
{ case MAT5_TYPE_DOUBLE :
psf_log_printf (psf, "Data type : double\n") ;
psf->sf.format |= SF_FORMAT_DOUBLE ;
psf->bytewidth = 8 ;
break ;
case MAT5_TYPE_FLOAT :
psf_log_printf (psf, "Data type : float\n") ;
psf->sf.format |= SF_FORMAT_FLOAT ;
psf->bytewidth = 4 ;
break ;
case MAT5_TYPE_INT32 :
psf_log_printf (psf, "Data type : 32 bit PCM\n") ;
psf->sf.format |= SF_FORMAT_PCM_32 ;
psf->bytewidth = 4 ;
break ;
case MAT5_TYPE_INT16 :
psf_log_printf (psf, "Data type : 16 bit PCM\n") ;
psf->sf.format |= SF_FORMAT_PCM_16 ;
psf->bytewidth = 2 ;
break ;
case MAT5_TYPE_UCHAR :
psf_log_printf (psf, "Data type : unsigned 8 bit PCM\n") ;
psf->sf.format |= SF_FORMAT_PCM_U8 ;
psf->bytewidth = 1 ;
break ;
default :
psf_log_printf (psf, "*** Error : Bad marker %08X\n", type) ;
return SFE_UNIMPLEMENTED ;
} ;
psf->dataoffset = psf_ftell (psf) ;
psf->datalength = psf->filelength - psf->dataoffset ;
return 0 ;
} /* mat5_read_header */