interpretor/libsndfile-1.0.25/programs/sndfile-cmp.c

   1 /*
   2 ** Copyright (C) 2008-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
   3 ** Copyright (C) 2008 Conrad Parker <conrad@metadecks.org>
   4 **
   5 ** All rights reserved.
   6 **
   7 ** Redistribution and use in source and binary forms, with or without
   8 ** modification, are permitted provided that the following conditions are
   9 ** met:
  10 **
  11 **     * Redistributions of source code must retain the above copyright
  12 **       notice, this list of conditions and the following disclaimer.
  13 **     * Redistributions in binary form must reproduce the above copyright
  14 **       notice, this list of conditions and the following disclaimer in
  15 **       the documentation and/or other materials provided with the
  16 **       distribution.
  17 **     * Neither the author nor the names of any contributors may be used
  18 **       to endorse or promote products derived from this software without
  19 **       specific prior written permission.
  20 **
  21 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  23 ** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24 ** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  25 ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  26 ** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  27 ** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  28 ** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29 ** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30 ** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31 ** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32 */
  33
  34 #include "sfconfig.h"
  35
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <inttypes.h>
  40
  41 #include <sndfile.h>
  42
  43 #include "common.h"
  44
  45 /* Length of comparison data buffers in units of items */
  46 #define BUFLEN 65536
  47
  48 static const char * progname = NULL ;
  49 static char * filename1 = NULL, * filename2 = NULL ;
  50
  51 static int
  52 comparison_error (const char * what, sf_count_t frame_offset)
  53 {       char buffer [128] = "" ;
  54
  55         if (frame_offset >= 0)
  56                 snprintf (buffer, sizeof (buffer), " (at frame offset %" PRId64 ")", frame_offset) ;
  57
  58         printf ("%s: %s of files %s and %s differ%s.\n", progname, what, filename1, filename2, buffer) ;
  59         return 1 ;
  60 } /* comparison_error */
  61
  62 static int
  63 compare (void)
  64 {
  65         double buf1 [BUFLEN], buf2 [BUFLEN] ;
  66         SF_INFO sfinfo1, sfinfo2 ;
  67         SNDFILE * sf1 = NULL, * sf2 = NULL ;
  68         sf_count_t items, i, nread1, nread2, offset = 0 ;
  69         int retval = 0 ;
  70
  71         memset (&sfinfo1, 0, sizeof (SF_INFO)) ;
  72         sf1 = sf_open (filename1, SFM_READ, &sfinfo1) ;
  73         if (sf1 == NULL)
  74         {       printf ("Error opening %s.\n", filename1) ;
  75                 retval = 1 ;
  76                 goto out ;
  77                 } ;
  78
  79         memset (&sfinfo2, 0, sizeof (SF_INFO)) ;
  80         sf2 = sf_open (filename2, SFM_READ, &sfinfo2) ;
  81         if (sf2 == NULL)
  82         {       printf ("Error opening %s.\n", filename2) ;
  83                 retval = 1 ;
  84                 goto out ;
  85                 } ;
  86
  87         if (sfinfo1.samplerate != sfinfo2.samplerate)
  88         {       retval = comparison_error ("Samplerates", -1) ;
  89                 goto out ;
  90                 } ;
  91
  92         if (sfinfo1.channels != sfinfo2.channels)
  93         {       retval = comparison_error ("Number of channels", -1) ;
  94                 goto out ;
  95                 } ;
  96
  97         /* Calculate the framecount that will fit in our data buffers */
  98         items = BUFLEN / sfinfo1.channels ;
  99
 100         while ( (nread1 = sf_readf_double (sf1, buf1, items)) > 0)
 101         {       nread2 = sf_readf_double (sf2, buf2, nread1) ;
 102                 if (nread2 != nread1)
 103                 {       retval = comparison_error ("PCM data lengths", -1) ;
 104                         goto out ;
 105                         } ;
 106                 for (i = 0 ; i < nread1 * sfinfo1.channels ; i++)
 107                 {       if (buf1 [i] != buf2 [i])
 108                         {       retval = comparison_error ("PCM data", offset + i / sfinfo1.channels) ;
 109                                 goto out ;
 110                                 } ;
 111                         } ;
 112                 offset += nread1 ;
 113                 } ;
 114
 115         if ( (nread2 = sf_readf_double (sf2, buf2, nread1)) != 0)
 116         {       retval = comparison_error ("PCM data lengths", -1) ;
 117                 goto out ;
 118                 } ;
 119
 120 out :
 121         sf_close (sf1) ;
 122         sf_close (sf2) ;
 123
 124         return retval ;
 125 } /* compare */
 126
 127 static void
 128 print_version (void)
 129 {       char buffer [256] ;
 130
 131         sf_command (NULL, SFC_GET_LIB_VERSION, buffer, sizeof (buffer)) ;
 132         printf ("\nVersion : %s\n\n", buffer) ;
 133 } /* print_version */
 134
 135 static void
 136 usage_exit (void)
 137 {
 138         print_version () ;
 139
 140         printf ("Usage : %s <filename> <filename>\n", progname) ;
 141         printf ("       Compare the PCM data of two sound files.\n\n") ;
 142         exit (0) ;
 143 } /* usage_exit */
 144
 145 int
 146 main (int argc, char *argv [])
 147 {
 148         progname = program_name (argv [0]) ;
 149
 150         if (argc != 3)
 151         {       usage_exit () ;
 152                 return 1 ;
 153                 } ;
 154
 155         filename1 = argv [argc - 2] ;
 156         filename2 = argv [argc - 1] ;
 157
 158         if (strcmp (filename1, filename2) == 0)
 159         {       printf ("Error : Input filenames are the same.\n\n") ;
 160                 usage_exit () ;
 161                 return 1 ;
 162                 } ;
 163
 164         return compare () ;
 165 } /* main */