interpretor/libsndfile-1.0.25/examples/sndfilehandle.cc

   1 /*
   2 ** Copyright (C) 2007-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
   3 **
   4 ** This program is free software; you can redistribute it and/or modify
   5 ** it under the terms of the GNU General Public License as published by
   6 ** the Free Software Foundation; either version 2 of the License, or
   7 ** (at your option) any later version.
   8 **
   9 ** This program is distributed in the hope that it will be useful,
  10 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 ** GNU General Public License for more details.
  13 **
  14 ** You should have received a copy of the GNU General Public License
  15 ** along with this program; if not, write to the Free Software
  16 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17 */
  18
  19 #include        <cstdio>
  20 #include        <cstring>
  21
  22 #include        <sndfile.hh>
  23
  24 #define         BUFFER_LEN              1024
  25
  26 static void
  27 create_file (const char * fname, int format)
  28 {       static short buffer [BUFFER_LEN] ;
  29
  30         SndfileHandle file ;
  31         int channels = 2 ;
  32         int srate = 48000 ;
  33
  34         printf ("Creating file named '%s'\n", fname) ;
  35
  36         file = SndfileHandle (fname, SFM_WRITE, format, channels, srate) ;
  37
  38         memset (buffer, 0, sizeof (buffer)) ;
  39
  40         file.write (buffer, BUFFER_LEN) ;
  41
  42         puts ("") ;
  43         /*
  44         **      The SndfileHandle object will automatically close the file and
  45         **      release all allocated memory when the object goes out of scope.
  46         **      This is the Resource Acquisition Is Initailization idom.
  47         **      See : http://en.wikipedia.org/wiki/Resource_Acquisition_Is_Initialization
  48         */
  49 } /* create_file */
  50
  51 static void
  52 read_file (const char * fname)
  53 {       static short buffer [BUFFER_LEN] ;
  54
  55         SndfileHandle file ;
  56
  57         file = SndfileHandle (fname) ;
  58
  59         printf ("Opened file '%s'\n", fname) ;
  60         printf ("    Sample rate : %d\n", file.samplerate ()) ;
  61         printf ("    Channels    : %d\n", file.channels ()) ;
  62
  63         file.read (buffer, BUFFER_LEN) ;
  64
  65         puts ("") ;
  66
  67         /* RAII takes care of destroying SndfileHandle object. */
  68 } /* read_file */
  69
  70 int
  71 main (void)
  72 {       const char * fname = "test.wav" ;
  73
  74         puts ("\nSimple example showing usage of the C++ SndfileHandle object.\n") ;
  75
  76         create_file (fname, SF_FORMAT_WAV | SF_FORMAT_PCM_16) ;
  77
  78         read_file (fname) ;
  79
  80         puts ("Done.\n") ;
  81         return 0 ;
  82 } /* main */
  83
  84