ivorbisfile_example.c
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:3k
源码类别:
Windows CE
开发平台:
C/C++
- /********************************************************************
- * *
- * THIS FILE IS PART OF THE OggVorbis 'TREMOR' 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 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
- * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
- * *
- ********************************************************************
- function: simple example decoder using vorbisidec
- ********************************************************************/
- /* 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 <stdio.h>
- #include <stdlib.h>
- #include <vorbis/ivorbiscodec.h>
- #include <vorbis/ivorbisfile.h>
- #ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
- #include <io.h>
- #include <fcntl.h>
- #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(stdin, &vf, NULL, 0) < 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,"%sn",*ptr);
- ++ptr;
- }
- fprintf(stderr,"nBitstream is %d channel, %ldHzn",vi->channels,vi->rate);
- fprintf(stderr,"nDecoded length: %ld samplesn",
- (long)ov_pcm_total(&vf,-1));
- fprintf(stderr,"Encoded by: %snn",ov_comment(&vf,-1)->vendor);
- }
- while(!eof){
- long ret=ov_read(&vf,pcmout,sizeof(pcmout),¤t_section);
- if (ret == 0) {
- /* EOF */
- eof=1;
- } else if (ret < 0) {
- /* 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);
- }