1 /********************************************************************
3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
5 * THE GNU LESSER/LIBRARY PUBLIC LICENSE, WHICH IS INCLUDED WITH *
6 * THIS SOURCE. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2000 *
9 * by Monty <monty@xiph.org> and the XIPHOPHORUS Company *
10 * http://www.xiph.org/ *
12 ********************************************************************
14 function: simple example decoder using vorbisfile
15 last mod: $Id: vorbisfile_example.c,v 1.3 2000/11/06 00:06:54 xiphmont Exp $
17 ********************************************************************/
19 /* Takes a vorbis bitstream from stdin and writes raw stereo PCM to
20 stdout using vorbisfile. Using vorbisfile is much simpler than
21 dealing with libvorbis. */
26 #include <vorbis/codec.h>
27 #include <vorbis/vorbisfile.h>
29 #ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
34 char pcmout[4096]; /* take 4k out of the data segment, not the stack */
36 int main(int argc, char **argv){
41 #ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */
42 /* Beware the evil ifdef. We avoid these where we can, but this one we
43 cannot. Don't add any more, you'll probably go to hell if you do. */
44 _setmode( _fileno( stdin ), _O_BINARY );
45 _setmode( _fileno( stdout ), _O_BINARY );
48 if(ov_open(stdin, &vf, NULL, 0) < 0) {
49 fprintf(stderr,"Input does not appear to be an Ogg bitstream.\n");
53 /* Throw the comments plus a few lines about the bitstream we're
56 char **ptr=ov_comment(&vf,-1)->user_comments;
57 vorbis_info *vi=ov_info(&vf,-1);
59 fprintf(stderr,"%s\n",*ptr);
62 fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi->channels,vi->rate);
63 fprintf(stderr,"Encoded by: %s\n\n",ov_comment(&vf,-1)->vendor);
67 long ret=ov_read(&vf,pcmout,sizeof(pcmout),0,2,1,¤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");