1 /********************************************************************
3 * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
5 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
6 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
7 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
9 * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
10 * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
12 ********************************************************************
14 function: simple example decoder using vorbisidec
16 ********************************************************************/
18 /* Takes a vorbis bitstream from stdin and writes raw stereo PCM to
19 stdout using vorbisfile. Using vorbisfile is much simpler than
20 dealing with libvorbis. */
24 #include <ivorbiscodec.h>
25 #include <ivorbisfile.h>
27 #ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
32 char pcmout[4096]; /* take 4k out of the data segment, not the stack */
39 #ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */
40 /* Beware the evil ifdef. We avoid these where we can, but this one we
41 cannot. Don't add any more, you'll probably go to hell if you do. */
42 _setmode( _fileno( stdin ), _O_BINARY );
43 _setmode( _fileno( stdout ), _O_BINARY );
46 if(ov_open(stdin, &vf, NULL, 0) < 0) {
47 fprintf(stderr,"Input does not appear to be an Ogg bitstream.\n");
51 /* Throw the comments plus a few lines about the bitstream we're
54 char **ptr=ov_comment(&vf,-1)->user_comments;
55 vorbis_info *vi=ov_info(&vf,-1);
57 fprintf(stderr,"%s\n",*ptr);
60 fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi->channels,vi->rate);
61 fprintf(stderr,"\nDecoded length: %ld samples\n",
62 (long)ov_pcm_total(&vf,-1));
63 fprintf(stderr,"Encoded by: %s\n\n",ov_comment(&vf,-1)->vendor);
67 long ret=ov_read(&vf,pcmout,sizeof(pcmout),¤t_section);
72 /* error in the stream. Not a problem, just reporting it in
73 case we (the app) cares. In this case, we don't. */
75 /* we don't bother dealing with sample rate changes, etc, but
77 fwrite(pcmout,1,ret,stdout);
84 fprintf(stderr,"Done.\n");