ref: 6553e2398a38fd92ce152dc90d947c925b8075c2
dir: /common/libsndfile/examples/sfconvert.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 General Public License as published by
** the Free Software Foundation; either version 2 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 General Public License for more details.
**
** You should have received a copy of the GNU 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 <string.h>
#include <ctype.h>
#include <sndfile.h>
#define BUFFER_LEN 1024
typedef struct
{ char *infilename, *outfilename ;
SF_INFO infileinfo, outfileinfo ;
} OptionData ;
static
void copy_data (SNDFILE *outfile, SNDFILE *infile, unsigned int len, double normfactor)
{ static double data [BUFFER_LEN] ;
unsigned int readcount, k ;
readcount = len ;
while (readcount == len)
{ readcount = sf_read_double (infile, data, len, 0) ;
for (k = 0 ; k < readcount ; k++)
data [k] *= normfactor ;
sf_write_double (outfile, data, readcount, 0) ;
} ;
return ;
} /* copy_data */
static
int guess_output_file_type (char *str, unsigned int format)
{ char buffer [16], *cptr ;
int k ;
format &= SF_FORMAT_SUBMASK ;
if (! (cptr = strrchr (str, '.')))
return 0 ;
strncpy (buffer, cptr + 1, 15) ;
buffer [15] = 0 ;
for (k = 0 ; buffer [k] ; k++)
buffer [k] = tolower ((buffer [k])) ;
if (! strncmp (buffer, "aif", 3))
return (SF_FORMAT_AIFF | format) ;
if (! strcmp (buffer, "wav"))
return (SF_FORMAT_WAV | format) ;
if (! strcmp (buffer, "au") || ! strcmp (buffer, "snd"))
return (SF_FORMAT_AU | format) ;
return 0 ;
} /* guess_output_file_type */
static
void print_usage (char *progname)
{ printf ("\nUsage : %s [options] <input file> <output file>\n", progname) ;
printf ("\n where [options] may be one of the following:\n") ;
printf (" -pcm16 : force the output to 16 bit pcm\n") ;
printf (" -pcm24 : force the output to 24 bit pcm\n") ;
printf (" -pcm32 : force the output to 32 bit pcm\n") ;
printf ("\n with one of the following extra specifiers:\n") ;
printf (" -fullscale : force the output signal to the full bit width\n") ;
printf ("\n") ;
} /* print_usage */
int main (int argc, char *argv[])
{ char *progname, *infilename, *outfilename ;
SNDFILE *infile, *outfile ;
SF_INFO sfinfo ;
int k, outfilemajor ;
int outfileminor = 0, outfilebits = 0, fullscale = 0 ;
double normfactor ;
progname = strrchr (argv [0], '/') ;
progname = progname ? progname + 1 : argv [0] ;
if (argc < 3 || argc > 5)
{ print_usage (progname) ;
return 1 ;
} ;
infilename = argv [argc-2] ;
outfilename = argv [argc-1] ;
if (! strcmp (infilename, outfilename))
{ printf ("Error : Input and output filenames are the same.\n\n") ;
print_usage (progname) ;
return 1 ;
} ;
if (infilename [0] == '-')
{ printf ("Error : Input filename (%s) looks like an option.\n\n", infilename) ;
print_usage (progname) ;
return 1 ;
} ;
if (outfilename [0] == '-')
{ printf ("Error : Output filename (%s) looks like an option.\n\n", outfilename) ;
print_usage (progname) ;
return 1 ;
} ;
for (k = 1 ; k < argc - 2 ; k++)
{ printf ("%s\n", argv [k]) ;
if (! strcmp (argv [k], "-pcm16"))
{ outfileminor = SF_FORMAT_PCM ;
outfilebits = 16 ;
continue ;
} ;
if (! strcmp (argv [k], "-pcm24"))
{ outfileminor = SF_FORMAT_PCM ;
outfilebits = 24 ;
continue ;
} ;
if (! strcmp (argv [k], "-pcm32"))
{ outfileminor = SF_FORMAT_PCM ;
outfilebits = 32 ;
continue ;
} ;
if (! strcmp (argv [k], "-fullscale"))
fullscale = 1 ;
} ;
if (! (infile = sf_open_read (infilename, &sfinfo)))
{ printf ("Not able to open input file %s.\n", infilename) ;
sf_perror (NULL) ;
return 1 ;
} ;
if (! (sfinfo.format = guess_output_file_type (outfilename, sfinfo.format)))
{ printf ("Error : Not able to determine output file type for %s.\n", outfilename) ;
return 1 ;
} ;
outfilemajor = sfinfo.format & SF_FORMAT_TYPEMASK ;
if (outfileminor)
{ sfinfo.format = outfilemajor | outfileminor ;
printf ("asdasdasdad\n") ;
}
else
sfinfo.format = outfilemajor | (sfinfo.format & SF_FORMAT_SUBMASK) ;
if (outfilebits)
sfinfo.pcmbitwidth = outfilebits ;
if (! sf_format_check (&sfinfo))
{ printf ("Error : output file format is invalid (0x%08X).\n", sfinfo.format) ;
return 1 ;
} ;
normfactor = sf_signal_max (infile) ;
if (normfactor < 1.0 && normfactor > 0.0)
normfactor = fullscale ? 2.0 / normfactor * ((double) (1 << (sfinfo.pcmbitwidth - 2))) :
2.0 * ((double) (1 << (sfinfo.pcmbitwidth - 2))) ;
else
normfactor = 1.0 ;
printf ("normfactor : %g\n", normfactor) ;
if (! (outfile = sf_open_write (outfilename, &sfinfo)))
{ printf ("Not able to open output file %s.\n", outfilename) ;
return 1 ;
} ;
copy_data (outfile, infile, BUFFER_LEN / sfinfo.channels, normfactor) ;
sf_close (infile) ;
sf_close (outfile) ;
return 0 ;
} /* main */