interpretor/libsndfile-1.0.25/examples/sndfile-to-text.c

   1 /*
   2 ** Copyright (C) 2008-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
   3 **
   4 ** All rights reserved.
   5 **
   6 ** Redistribution and use in source and binary forms, with or without
   7 ** modification, are permitted provided that the following conditions are
   8 ** met:
   9 **
  10 **     * Redistributions of source code must retain the above copyright
  11 **       notice, this list of conditions and the following disclaimer.
  12 **     * Redistributions in binary form must reproduce the above copyright
  13 **       notice, this list of conditions and the following disclaimer in
  14 **       the documentation and/or other materials provided with the
  15 **       distribution.
  16 **     * Neither the author nor the names of any contributors may be used
  17 **       to endorse or promote products derived from this software without
  18 **       specific prior written permission.
  19 **
  20 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22 ** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23 ** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  24 ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25 ** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  26 ** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  27 ** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  28 ** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  29 ** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  30 ** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31 */
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <ctype.h>
  37
  38 #include <sndfile.h>
  39
  40 #define BLOCK_SIZE 512
  41
  42 static void
  43 print_usage (char *progname)
  44 {       printf ("\nUsage : %s <input file> <output file>\n", progname) ;
  45         puts ("\n"
  46                 "    Where the output file will contain a line for each frame\n"
  47                 "    and a column for each channel.\n"
  48                 ) ;
  49
  50 } /* print_usage */
  51
  52 static void
  53 convert_to_text (SNDFILE * infile, FILE * outfile, int channels)
  54 {       float buf [channels * BLOCK_SIZE] ;
  55         int k, m, readcount ;
  56
  57         while ((readcount = sf_readf_float (infile, buf, BLOCK_SIZE)) > 0)
  58         {       for (k = 0 ; k < readcount ; k++)
  59                 {       for (m = 0 ; m < channels ; m++)
  60                                 fprintf (outfile, " % 12.10f", buf [k * channels + m]) ;
  61                         fprintf (outfile, "\n") ;
  62                         } ;
  63                 } ;
  64
  65         return ;
  66 } /* convert_to_text */
  67
  68 int
  69 main (int argc, char * argv [])
  70 {       char            *progname, *infilename, *outfilename ;
  71         SNDFILE         *infile = NULL ;
  72         FILE            *outfile = NULL ;
  73         SF_INFO         sfinfo ;
  74
  75         progname = strrchr (argv [0], '/') ;
  76         progname = progname ? progname + 1 : argv [0] ;
  77
  78         if (argc != 3)
  79         {       print_usage (progname) ;
  80                 return 1 ;
  81                 } ;
  82
  83         infilename = argv [1] ;
  84         outfilename = argv [2] ;
  85
  86         if (strcmp (infilename, outfilename) == 0)
  87         {       printf ("Error : Input and output filenames are the same.\n\n") ;
  88                 print_usage (progname) ;
  89                 return 1 ;
  90                 } ;
  91
  92         if (infilename [0] == '-')
  93         {       printf ("Error : Input filename (%s) looks like an option.\n\n", infilename) ;
  94                 print_usage (progname) ;
  95                 return 1 ;
  96                 } ;
  97
  98         if (outfilename [0] == '-')
  99         {       printf ("Error : Output filename (%s) looks like an option.\n\n", outfilename) ;
 100                 print_usage (progname) ;
 101                 return 1 ;
 102                 } ;
 103
 104         if ((infile = sf_open (infilename, SFM_READ, &sfinfo)) == NULL)
 105         {       printf ("Not able to open input file %s.\n", infilename) ;
 106                 puts (sf_strerror (NULL)) ;
 107                 return 1 ;
 108                 } ;
 109
 110         /* Open the output file. */
 111         if ((outfile = fopen (outfilename, "w")) == NULL)
 112         {       printf ("Not able to open output file %s : %s\n", outfilename, sf_strerror (NULL)) ;
 113                 return 1 ;
 114                 } ;
 115
 116         fprintf (outfile, "# Converted from file %s.\n", infilename) ;
 117         fprintf (outfile, "# Channels %d, Sample rate %d\n", sfinfo.channels, sfinfo.samplerate) ;
 118
 119         convert_to_text (infile, outfile, sfinfo.channels) ;
 120
 121         sf_close (infile) ;
 122         fclose (outfile) ;
 123
 124         return 0 ;
 125 } /* main */
 126