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Diffstat (limited to 'examples/seeking_example.c')
| -rw-r--r-- | examples/seeking_example.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/examples/seeking_example.c b/examples/seeking_example.c deleted file mode 100644 index 4f2967eb..00000000 --- a/examples/seeking_example.c +++ /dev/null @@ -1,198 +0,0 @@ -/******************************************************************** - * * - * 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 1994-2001 * - * by the XIPHOPHORUS Company http://www.xiph.org/ * - - ******************************************************************** - - function: illustrate seeking, and test it too - last mod: $Id: seeking_example.c,v 1.8 2001/05/27 06:43:58 xiphmont Exp $ - - ********************************************************************/ - -#include <stdlib.h> -#include <stdio.h> -#include "vorbis/codec.h" -#include "vorbis/vorbisfile.h" -#include "../lib/misc.h" - - -void _verify(OggVorbis_File *ov,ogg_int64_t pos, - ogg_int64_t val,ogg_int64_t pcmval, - ogg_int64_t pcmlength, - char *bigassbuffer){ - int j; - long bread; - char buffer[4096]; - int dummy; - - /* verify the raw position, the pcm position and position decode */ - if(val!=-1 && ov_raw_tell(ov)<val){ - printf("raw position out of tolerance: requested %ld, got %ld\n", - (long)val,(long)ov_raw_tell(ov)); - exit(1); - } - if(pcmval!=-1 && ov_pcm_tell(ov)>pcmval){ - printf("pcm position out of tolerance: requested %ld, got %ld\n", - (long)pcmval,(long)ov_pcm_tell(ov)); - exit(1); - } - pos=ov_pcm_tell(ov); - if(pos<0 || pos>pcmlength){ - printf("pcm position out of bounds: got %ld\n",(long)pos); - exit(1); - } - bread=ov_read(ov,buffer,4096,1,1,1,&dummy); - for(j=0;j<bread;j++){ - if(buffer[j]!=bigassbuffer[j+pos*2]){ - printf("data position after seek doesn't match pcm position\n"); - exit(1); - } - } -} - -int main(){ - OggVorbis_File ov; - int i,ret; - ogg_int64_t pcmlength; - char *bigassbuffer; - int dummy; - - /* open the file/pipe on stdin */ - if(ov_open(stdin,&ov,NULL,-1)<0){ - printf("Could not open input as an OggVorbis file.\n\n"); - exit(1); - } - - if(ov_seekable(&ov)){ - - /* to simplify our own lives, we want to assume the whole file is - stereo. Verify this to avoid potentially mystifying users - (pissing them off is OK, just don't confuse them) */ - for(i=0;i<ov.links;i++){ - vorbis_info *vi=ov_info(&ov,i); - if(vi->channels!=2){ - printf("Sorry; right now seeking_test can only use Vorbis files\n" - "that are entirely stereo.\n\n"); - exit(1); - } - } - - /* because we want to do sample-level verification that the seek - does what it claimed, decode the entire file into memory */ - printf("loading....\n"); - fflush(stdout); - pcmlength=ov_pcm_total(&ov,-1); - bigassbuffer=malloc(pcmlength*2); /* w00t */ - i=0; - while(i<pcmlength*2){ - int ret=ov_read(&ov,bigassbuffer+i,pcmlength*2-i,1,1,1,&dummy); - if(ret<0)continue; - if(ret){ - i+=ret; - }else{ - pcmlength=i/2; - } - } - - /* Exercise all the real seeking cases; ov_raw_seek, - ov_pcm_seek_page and ov_pcm_seek. time seek is just a wrapper - on pcm_seek */ - { - ogg_int64_t length=ov.end; - printf("testing raw seeking to random places in %ld bytes....\n", - (long)length); - - for(i=0;i<1000;i++){ - ogg_int64_t val=(double)rand()/RAND_MAX*length; - ogg_int64_t pos; - printf("\r\t%d [raw position %ld]... ",i,(long)val); - fflush(stdout); - ret=ov_raw_seek(&ov,val); - if(ret<0){ - printf("seek failed: %d\n",ret); - exit(1); - } - - _verify(&ov,pos,val,-1,pcmlength,bigassbuffer); - - } - } - - printf("\r"); - { - ogg_int64_t length=ov.end; - printf("testing pcm page seeking to random places in %ld samples....\n", - (long)pcmlength); - - for(i=0;i<1000;i++){ - ogg_int64_t val=(double)rand()/RAND_MAX*pcmlength; - ogg_int64_t pos; - printf("\r\t%d [pcm position %ld]... ",i,(long)val); - fflush(stdout); - ret=ov_pcm_seek_page(&ov,val); - if(ret<0){ - printf("seek failed: %d\n",ret); - exit(1); - } - - _verify(&ov,pos,-1,val,pcmlength,bigassbuffer); - - } - } - - printf("\r"); - { - ogg_int64_t length=ov.end; - printf("testing pcm exact seeking to random places in %ld samples....\n", - (long)pcmlength); - - for(i=0;i<1000;i++){ - ogg_int64_t val=(double)rand()/RAND_MAX*pcmlength; - ogg_int64_t pos; - printf("\r\t%d [pcm position %ld]... ",i,(long)val); - fflush(stdout); - ret=ov_pcm_seek(&ov,val); - if(ret<0){ - printf("seek failed: %d\n",ret); - exit(1); - } - if(ov_pcm_tell(&ov)!=val){ - printf("Decalred position didn't perfectly match request: %ld != %ld\n", - (long)val,(long)ov_pcm_tell(&ov)); - exit(1); - } - - _verify(&ov,pos,-1,val,pcmlength,bigassbuffer); - - } - } - - printf("\r \nOK.\n\n"); - - - }else{ - printf("Standard input was not seekable.\n"); - } - - ov_clear(&ov); - return 0; -} - - - - - - - - - - - - - |