author | sheepluva |
Fri, 28 Oct 2011 09:12:05 +0200 | |
changeset 6221 | f3ac3e51418b |
parent 5170 | f7e49eff3708 |
permissions | -rw-r--r-- |
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/******************************************************************** |
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* * |
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* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. * |
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* * |
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * |
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * |
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * |
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* * |
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* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 * |
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* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ * |
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* * |
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******************************************************************** |
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function: simple example decoder using vorbisidec |
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********************************************************************/ |
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/* Takes a vorbis bitstream from stdin and writes raw stereo PCM to |
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stdout using vorbisfile. Using vorbisfile is much simpler than |
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dealing with libvorbis. */ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <vorbis/ivorbiscodec.h> |
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#include <vorbis/ivorbisfile.h> |
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#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */ |
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#include <io.h> |
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#include <fcntl.h> |
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#endif |
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char pcmout[4096]; /* take 4k out of the data segment, not the stack */ |
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int main(){ |
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OggVorbis_File vf; |
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int eof=0; |
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int current_section; |
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#ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */ |
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/* Beware the evil ifdef. We avoid these where we can, but this one we |
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cannot. Don't add any more, you'll probably go to hell if you do. */ |
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_setmode( _fileno( stdin ), _O_BINARY ); |
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_setmode( _fileno( stdout ), _O_BINARY ); |
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#endif |
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if(ov_open(stdin, &vf, NULL, 0) < 0) { |
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fprintf(stderr,"Input does not appear to be an Ogg bitstream.\n"); |
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exit(1); |
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} |
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/* Throw the comments plus a few lines about the bitstream we're |
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decoding */ |
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{ |
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char **ptr=ov_comment(&vf,-1)->user_comments; |
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vorbis_info *vi=ov_info(&vf,-1); |
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while(*ptr){ |
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fprintf(stderr,"%s\n",*ptr); |
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++ptr; |
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} |
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fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi->channels,vi->rate); |
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fprintf(stderr,"\nDecoded length: %ld samples\n", |
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(long)ov_pcm_total(&vf,-1)); |
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fprintf(stderr,"Encoded by: %s\n\n",ov_comment(&vf,-1)->vendor); |
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} |
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while(!eof){ |
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long ret=ov_read(&vf,pcmout,sizeof(pcmout),¤t_section); |
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if (ret == 0) { |
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/* EOF */ |
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eof=1; |
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} else if (ret < 0) { |
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/* error in the stream. Not a problem, just reporting it in |
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case we (the app) cares. In this case, we don't. */ |
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} else { |
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/* we don't bother dealing with sample rate changes, etc, but |
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you'll have to*/ |
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fwrite(pcmout,1,ret,stdout); |
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} |
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} |
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/* cleanup */ |
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ov_clear(&vf); |
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fprintf(stderr,"Done.\n"); |
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return(0); |
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} |