release/src/router/libvorbis/examples/chaining_example.c

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
   4  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
   5  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
   6  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
   7  *                                                                  *
   8  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
   9  * by the Xiph.Org Foundation http://www.xiph.org/                  *
  10  *                                                                  *
  11  ********************************************************************
  12
  13  function: illustrate simple use of chained bitstream and vorbisfile.a
  14  last mod: $Id: chaining_example.c 16243 2009-07-10 02:49:31Z xiphmont $
  15
  16  ********************************************************************/
  17
  18 #include <stdlib.h>
  19 #include <vorbis/codec.h>
  20 #include <vorbis/vorbisfile.h>
  21
  22 #ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
  23 #include <io.h>
  24 #include <fcntl.h>
  25 #endif
  26
  27 int main(){
  28   OggVorbis_File ov;
  29   int i;
  30
  31 #ifdef _WIN32 /* We need to set stdin to binary mode. Damn windows. */
  32   /* Beware the evil ifdef. We avoid these where we can, but this one we
  33      cannot. Don't add any more, you'll probably go to hell if you do. */
  34   _setmode( _fileno( stdin ), _O_BINARY );
  35 #endif
  36
  37   /* open the file/pipe on stdin */
  38   if(ov_open_callbacks(stdin,&ov,NULL,-1,OV_CALLBACKS_NOCLOSE)<0){
  39     printf("Could not open input as an OggVorbis file.\n\n");
  40     exit(1);
  41   }
  42
  43   /* print details about each logical bitstream in the input */
  44   if(ov_seekable(&ov)){
  45     printf("Input bitstream contained %ld logical bitstream section(s).\n",
  46            ov_streams(&ov));
  47     printf("Total bitstream samples: %ld\n\n",
  48            (long)ov_pcm_total(&ov,-1));
  49     printf("Total bitstream playing time: %ld seconds\n\n",
  50            (long)ov_time_total(&ov,-1));
  51
  52   }else{
  53     printf("Standard input was not seekable.\n"
  54            "First logical bitstream information:\n\n");
  55   }
  56
  57   for(i=0;i<ov_streams(&ov);i++){
  58     vorbis_info *vi=ov_info(&ov,i);
  59     printf("\tlogical bitstream section %d information:\n",i+1);
  60     printf("\t\t%ldHz %d channels bitrate %ldkbps serial number=%ld\n",
  61            vi->rate,vi->channels,ov_bitrate(&ov,i)/1000,
  62            ov_serialnumber(&ov,i));
  63     printf("\t\theader length: %ld bytes\n",(long)
  64            (ov.dataoffsets[i]-ov.offsets[i]));
  65     printf("\t\tcompressed length: %ld bytes\n",(long)(ov_raw_total(&ov,i)));
  66     printf("\t\tplay time: %lds\n",(long)ov_time_total(&ov,i));
  67   }
  68
  69   ov_clear(&ov);
  70   return 0;
  71 }
  72