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/*
** Copyright (C) 2008 Conrad Parker <conrad@metadecks.org>
** Copyright (C) 2008-2010 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 "sfconfig.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <sndfile.h>
/* Length of comparison data buffers in units of items */
#define BUFLEN 65536
static char * progname = NULL ;
static char * filename1 = NULL, * filename2 = NULL ;
static int
comparison_error (const char * what, sf_count_t frame_offset)
{ char buffer [128] = "" ;
if (frame_offset >= 0)
snprintf (buffer, sizeof (buffer), " (at frame offset %" PRId64 ")", frame_offset) ;
printf ("%s: %s of files %s and %s differ%s.\n", progname, what, filename1, filename2, buffer) ;
return 1 ;
} /* comparison_error */
static int
compare (void)
{
double buf1 [BUFLEN], buf2 [BUFLEN] ;
SF_INFO sfinfo1, sfinfo2 ;
SNDFILE * sf1 = NULL, * sf2 = NULL ;
sf_count_t items, i, nread1, nread2, offset = 0 ;
int retval = 0 ;
memset (&sfinfo1, 0, sizeof (SF_INFO)) ;
sf1 = sf_open (filename1, SFM_READ, &sfinfo1) ;
if (sf1 == NULL)
{ printf ("Error opening %s.\n", filename1) ;
retval = 1 ;
goto out ;
} ;
memset (&sfinfo2, 0, sizeof (SF_INFO)) ;
sf2 = sf_open (filename2, SFM_READ, &sfinfo2) ;
if (sf2 == NULL)
{ printf ("Error opening %s.\n", filename2) ;
retval = 1 ;
goto out ;
} ;
if (sfinfo1.samplerate != sfinfo2.samplerate)
{ retval = comparison_error ("Samplerates", -1) ;
goto out ;
} ;
if (sfinfo1.channels != sfinfo2.channels)
{ retval = comparison_error ("Number of channels", -1) ;
goto out ;
} ;
/* Calculate the framecount that will fit in our data buffers */
items = BUFLEN / sfinfo1.channels ;
while ( (nread1 = sf_readf_double (sf1, buf1, items)) > 0)
{ nread2 = sf_readf_double (sf2, buf2, nread1) ;
if (nread2 != nread1)
{ retval = comparison_error ("PCM data lengths", -1) ;
goto out ;
} ;
for (i = 0 ; i < nread1 * sfinfo1.channels ; i++)
{ if (buf1 [i] != buf2 [i])
{ retval = comparison_error ("PCM data", offset + i / sfinfo1.channels) ;
goto out ;
} ;
} ;
offset += nread1 ;
} ;
if ( (nread2 = sf_readf_double (sf2, buf2, nread1)) != 0)
{ retval = comparison_error ("PCM data lengths", -1) ;
goto out ;
} ;
out :
sf_close (sf1) ;
sf_close (sf2) ;
return retval ;
} /* compare */
static void
print_version (void)
{ char buffer [256] ;
sf_command (NULL, SFC_GET_LIB_VERSION, buffer, sizeof (buffer)) ;
printf ("\nVersion : %s\n\n", buffer) ;
} /* print_version */
static void
usage_exit (void)
{
print_version () ;
printf ("Usage : %s <filename> <filename>\n", progname) ;
printf (" Compare the PCM data of two sound files.\n\n") ;
exit (0) ;
} /* usage_exit */
int
main (int argc, char *argv [])
{
progname = strrchr (argv [0], '/') ;
progname = progname ? progname + 1 : argv [0] ;
if (argc != 3)
{ usage_exit () ;
return 1 ;
} ;
filename1 = argv [argc - 2] ;
filename2 = argv [argc - 1] ;
if (strcmp (filename1, filename2) == 0)
{ printf ("Error : Input filenames are the same.\n\n") ;
usage_exit () ;
return 1 ;
} ;
return compare () ;
} /* main */
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