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/*
** Copyright (C) 2009-2010 Erik de Castro Lopo <erikd@mega-nerd.com>
**
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the author nor the names of any contributors may be used
** to endorse or promote products derived from this software without
** specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sndfile.h>
#include "common.h"
#define BUFFER_LEN 4096
#define MAX_CHANNELS 16
typedef struct
{ SNDFILE * infile ;
SNDFILE * outfile [MAX_CHANNELS] ;
union
{ double d [MAX_CHANNELS * BUFFER_LEN] ;
int i [MAX_CHANNELS * BUFFER_LEN] ;
} din ;
union
{ double d [BUFFER_LEN] ;
int i [BUFFER_LEN] ;
} dout ;
int channels ;
} STATE ;
static void usage_exit (void) ;
static void deinterleave_int (STATE * state) ;
static void deinterleave_double (STATE * state) ;
int
main (int argc, char **argv)
{ STATE state ;
SF_INFO sfinfo ;
char pathname [512], ext [32], *cptr ;
int ch, double_split ;
if (argc != 2)
{ if (argc != 1)
puts ("\nError : need a single input file.\n") ;
usage_exit () ;
} ;
memset (&state, 0, sizeof (state)) ;
memset (&sfinfo, 0, sizeof (sfinfo)) ;
if ((state.infile = sf_open (argv [1], SFM_READ, &sfinfo)) == NULL)
{ printf ("\nError : Not able to open input file '%s'\n%s\n", argv [1], sf_strerror (NULL)) ;
exit (1) ;
} ;
if (sfinfo.channels < 2)
{ printf ("\nError : Input file '%s' only has one channel.\n", argv [1]) ;
exit (1) ;
} ;
state.channels = sfinfo.channels ;
sfinfo.channels = 1 ;
snprintf (pathname, sizeof (pathname), "%s", argv [1]) ;
if ((cptr = strrchr (pathname, '.')) == NULL)
ext [0] = 0 ;
else
{ snprintf (ext, sizeof (ext), "%s", cptr) ;
cptr [0] = 0 ;
} ;
printf ("Input file : %s\n", pathname) ;
puts ("Output files :") ;
for (ch = 0 ; ch < state.channels ; ch++)
{ char filename [520] ;
snprintf (filename, sizeof (filename), "%s_%02d%s", pathname, ch, ext) ;
if ((state.outfile [ch] = sf_open (filename, SFM_WRITE, &sfinfo)) == NULL)
{ printf ("Not able to open output file '%s'\n%s\n", filename, sf_strerror (NULL)) ;
exit (1) ;
} ;
printf (" %s\n", filename) ;
} ;
switch (sfinfo.format & SF_FORMAT_SUBMASK)
{ case SF_FORMAT_FLOAT :
case SF_FORMAT_DOUBLE :
case SF_FORMAT_VORBIS :
double_split = 1 ;
break ;
default :
double_split = 0 ;
break ;
} ;
if (double_split)
deinterleave_double (&state) ;
else
deinterleave_int (&state) ;
sf_close (state.infile) ;
for (ch = 0 ; ch < MAX_CHANNELS ; ch++)
if (state.outfile [ch] != NULL)
sf_close (state.outfile [ch]) ;
return 0 ;
} /* main */
/*------------------------------------------------------------------------------
*/
static void
usage_exit (void)
{ puts ("\nUsage : sndfile-deinterleave <filename>\n") ;
puts (
"Split a mutli-channel file into a set of mono files.\n"
"\n"
"If the input file is named 'a.wav', the output files will be named\n"
"a_00.wav, a_01.wav and so on.\n"
) ;
exit (0) ;
} /* usage_exit */
static void
deinterleave_int (STATE * state)
{ int read_len ;
int ch, k ;
do
{ read_len = sf_readf_int (state->infile, state->din.i, BUFFER_LEN) ;
for (ch = 0 ; ch < state->channels ; ch ++)
{ for (k = 0 ; k < read_len ; k++)
state->dout.i [k] = state->din.i [k * state->channels + ch] ;
sf_write_int (state->outfile [ch], state->dout.i, read_len) ;
} ;
}
while (read_len > 0) ;
} /* deinterleave_int */
static void
deinterleave_double (STATE * state)
{ int read_len ;
int ch, k ;
do
{ read_len = sf_readf_double (state->infile, state->din.d, BUFFER_LEN) ;
for (ch = 0 ; ch < state->channels ; ch ++)
{ for (k = 0 ; k < read_len ; k++)
state->dout.d [k] = state->din.d [k * state->channels + ch] ;
sf_write_double (state->outfile [ch], state->dout.d, read_len) ;
} ;
}
while (read_len > 0) ;
} /* deinterleave_double */
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