/******************************************************************** * * * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * * * * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * * by the Xiph.Org Foundation http://www.xiph.org/ * * * ******************************************************************** function: simple example decoder using vorbisfile last mod: $Id: vorbisfile_example.c 16328 2009-07-24 01:51:10Z xiphmont $ ********************************************************************/ /* Takes a vorbis bitstream from stdin and writes raw stereo PCM to stdout using vorbisfile. Using vorbisfile is much simpler than dealing with libvorbis. */ #include #include #include #include #include #ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */ #include #include #endif char pcmout[4096]; /* take 4k out of the data segment, not the stack */ int main(){ OggVorbis_File vf; int eof=0; int current_section; #ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */ /* Beware the evil ifdef. We avoid these where we can, but this one we cannot. Don't add any more, you'll probably go to hell if you do. */ _setmode( _fileno( stdin ), _O_BINARY ); _setmode( _fileno( stdout ), _O_BINARY ); #endif if(ov_open_callbacks(stdin, &vf, NULL, 0, OV_CALLBACKS_NOCLOSE) < 0) { fprintf(stderr,"Input does not appear to be an Ogg bitstream.\n"); exit(1); } /* Throw the comments plus a few lines about the bitstream we're decoding */ { char **ptr=ov_comment(&vf,-1)->user_comments; vorbis_info *vi=ov_info(&vf,-1); while(*ptr){ fprintf(stderr,"%s\n",*ptr); ++ptr; } fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi->channels,vi->rate); fprintf(stderr,"\nDecoded length: %ld samples\n", (long)ov_pcm_total(&vf,-1)); fprintf(stderr,"Encoded by: %s\n\n",ov_comment(&vf,-1)->vendor); } while(!eof){ long ret=ov_read(&vf,pcmout,sizeof(pcmout),0,2,1,¤t_section); if (ret == 0) { /* EOF */ eof=1; } else if (ret < 0) { if(ret==OV_EBADLINK){ fprintf(stderr,"Corrupt bitstream section! Exiting.\n"); exit(1); } /* some other error in the stream. Not a problem, just reporting it in case we (the app) cares. In this case, we don't. */ } else { /* we don't bother dealing with sample rate changes, etc, but you'll have to*/ fwrite(pcmout,1,ret,stdout); } } /* cleanup */ ov_clear(&vf); fprintf(stderr,"Done.\n"); return(0); }