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  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 https://xiph.org/                     *
  10.  *                                                                  *
  11.  ********************************************************************
  12.  
  13.  function: illustrate simple use of chained bitstream and vorbisfile.a
  14.  
  15.  ********************************************************************/
  16.  
  17. #include <stdlib.h>
  18. #include <vorbis/codec.h>
  19. #include <vorbis/vorbisfile.h>
  20.  
  21. #ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
  22. #include <io.h>
  23. #include <fcntl.h>
  24. #endif
  25.  
  26. int main(){
  27.   OggVorbis_File ov;
  28.   int i;
  29.  
  30. #ifdef _WIN32 /* We need to set stdin to binary mode. Damn windows. */
  31.   /* Beware the evil ifdef. We avoid these where we can, but this one we
  32.      cannot. Don't add any more, you'll probably go to hell if you do. */
  33.   _setmode( _fileno( stdin ), _O_BINARY );
  34. #endif
  35.  
  36.   /* open the file/pipe on stdin */
  37.   if(ov_open_callbacks(stdin,&ov,NULL,-1,OV_CALLBACKS_NOCLOSE)<0){
  38.     printf("Could not open input as an OggVorbis file.\n\n");
  39.     exit(1);
  40.   }
  41.  
  42.   /* print details about each logical bitstream in the input */
  43.   if(ov_seekable(&ov)){
  44.     printf("Input bitstream contained %ld logical bitstream section(s).\n",
  45.            ov_streams(&ov));
  46.     printf("Total bitstream samples: %ld\n\n",
  47.            (long)ov_pcm_total(&ov,-1));
  48.     printf("Total bitstream playing time: %ld seconds\n\n",
  49.            (long)ov_time_total(&ov,-1));
  50.  
  51.   }else{
  52.     printf("Standard input was not seekable.\n"
  53.            "First logical bitstream information:\n\n");
  54.   }
  55.  
  56.   for(i=0;i<ov_streams(&ov);i++){
  57.     vorbis_info *vi=ov_info(&ov,i);
  58.     printf("\tlogical bitstream section %d information:\n",i+1);
  59.     printf("\t\t%ldHz %d channels bitrate %ldkbps serial number=%ld\n",
  60.            vi->rate,vi->channels,ov_bitrate(&ov,i)/1000,
  61.            ov_serialnumber(&ov,i));
  62.     printf("\t\theader length: %ld bytes\n",(long)
  63.            (ov.dataoffsets[i]-ov.offsets[i]));
  64.     printf("\t\tcompressed length: %ld bytes\n",(long)(ov_raw_total(&ov,i)));
  65.     printf("\t\tplay time: %lds\n",(long)ov_time_total(&ov,i));
  66.   }
  67.  
  68.   ov_clear(&ov);
  69.   return 0;
  70. }
  71.  
  72.