summaryrefslogtreecommitdiffhomepage
path: root/vorbis/examples/seeking_example.c
diff options
context:
space:
mode:
Diffstat (limited to 'vorbis/examples/seeking_example.c')
-rw-r--r--vorbis/examples/seeking_example.c277
1 files changed, 0 insertions, 277 deletions
diff --git a/vorbis/examples/seeking_example.c b/vorbis/examples/seeking_example.c
deleted file mode 100644
index d039b0d..0000000
--- a/vorbis/examples/seeking_example.c
+++ /dev/null
@@ -1,277 +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 1994-2007 *
- * by the Xiph.Org Foundation http://www.xiph.org/ *
- * *
- ********************************************************************
-
- function: illustrate seeking, and test it too
-
- ********************************************************************/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "vorbis/codec.h"
-#include "vorbis/vorbisfile.h"
-
-#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
-# include <io.h>
-# include <fcntl.h>
-#endif
-
-void _verify(OggVorbis_File *ov,
- ogg_int64_t val,ogg_int64_t pcmval,double timeval,
- ogg_int64_t pcmlength,
- char *bigassbuffer){
- off_t i;
- int j;
- long bread;
- char buffer[4096];
- int dummy;
- ogg_int64_t pos;
- int hs = ov_halfrate_p(ov);
-
- /* verify the raw position, the pcm position and position decode */
- if(val!=-1 && ov_raw_tell(ov)<val){
- fprintf(stderr,"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){
- fprintf(stderr,"pcm position out of tolerance: requested %ld, got %ld\n",
- (long)pcmval,(long)ov_pcm_tell(ov));
- exit(1);
- }
- if(timeval!=-1 && ov_time_tell(ov)>timeval){
- fprintf(stderr,"time position out of tolerance: requested %f, got %f\n",
- timeval,ov_time_tell(ov));
- exit(1);
- }
- pos=ov_pcm_tell(ov);
- if(pos<0 || pos>pcmlength){
- fprintf(stderr,"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>>hs)*2)]){
- fprintf(stderr,"data after seek doesn't match declared pcm position %ld\n",(long)pos);
-
- for(i=0;i<(pcmlength>>hs)*2-bread;i++){
- for(j=0;j<bread;j++)
- if(buffer[j] != bigassbuffer[i+j])break;
- if(j==bread){
- fprintf(stderr,"data after seek appears to match position %ld\n",(long)((i/2)<<hs));
- }
- }
- {
- FILE *f=fopen("a.m","w");
- for(j=0;j<bread;j++)fprintf(f,"%d %d\n",j,(int)buffer[j]);
- fclose(f);
- f=fopen("b.m","w");
- for(j=-4096;j<bread+4096;j++)
- if(j+((pos*2)>>hs)>=0 && (j+((pos*2)>>hs))<(pcmlength>>hs)*2)
- fprintf(f,"%d %d\n",j,(int)bigassbuffer[j+((pos*2)>>hs)]);
- fclose(f);
- }
-
- exit(1);
- }
- }
-}
-
-int main(){
- OggVorbis_File ov;
- int i,ret;
- ogg_int64_t pcmlength;
- double timelength;
- char *bigassbuffer;
- int dummy;
- int hs=0;
-
-#ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */
- _setmode( _fileno( stdin ), _O_BINARY );
-#endif
-
-
- /* open the file/pipe on stdin */
- if(ov_open_callbacks(stdin,&ov,NULL,-1,OV_CALLBACKS_NOCLOSE)<0){
- fprintf(stderr,"Could not open input as an OggVorbis file.\n\n");
- exit(1);
- }
-
-#if 0 /*enable this code to test seeking with halfrate decode */
- if(ov_halfrate(&ov,1)){
- fprintf(stderr,"Sorry; unable to set half-rate decode.\n\n");
- exit(1);
- }else
- hs=1;
-#endif
-
- 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){
- fprintf(stderr,"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 */
- pcmlength=ov_pcm_total(&ov,-1);
- timelength=ov_time_total(&ov,-1);
- bigassbuffer=malloc((pcmlength>>hs)*2); /* w00t */
- i=0;
- while(i<(pcmlength>>hs)*2){
- int ret=ov_read(&ov,bigassbuffer+i,((pcmlength>>hs)*2)-i,1,1,1,&dummy);
- if(ret<0){
- fprintf(stderr,"Error reading file.\n");
- exit(1);
- }
- if(ret){
- i+=ret;
- }else{
- pcmlength=(i/2)<<hs;
- }
- fprintf(stderr,"\rloading.... [%ld left] ",
- (long)((pcmlength>>hs)*2-i));
- }
-
- {
- ogg_int64_t length=ov.end;
- fprintf(stderr,"\rtesting 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;
- fprintf(stderr,"\r\t%d [raw position %ld]... ",i,(long)val);
- ret=ov_raw_seek(&ov,val);
- if(ret<0){
- fprintf(stderr,"seek failed: %d\n",ret);
- exit(1);
- }
-
- _verify(&ov,val,-1,-1.,pcmlength,bigassbuffer);
-
- }
- }
-
- fprintf(stderr,"\r");
- {
- fprintf(stderr,"testing pcm page seeking to random places in %ld samples....\n",
- (long)pcmlength);
-
- for(i=0;i<1000;i++){
- ogg_int64_t val= i==0?(ogg_int64_t)0:(double)rand()/RAND_MAX*pcmlength;
- fprintf(stderr,"\r\t%d [pcm position %ld]... ",i,(long)val);
- ret=ov_pcm_seek_page(&ov,val);
- if(ret<0){
- fprintf(stderr,"seek failed: %d\n",ret);
- exit(1);
- }
-
- _verify(&ov,-1,val,-1.,pcmlength,bigassbuffer);
-
- }
- }
-
- fprintf(stderr,"\r");
- {
- fprintf(stderr,"testing pcm exact seeking to random places in %f seconds....\n",
- timelength);
- for(i=0;i<1000;i++){
- ogg_int64_t val= i==0?(ogg_int64_t)0:(double)rand()/RAND_MAX*pcmlength;
- fprintf(stderr,"\r\t%d [pcm position %ld]... ",i,(long)val);
- ret=ov_pcm_seek(&ov,val);
- if(ret<0){
- fprintf(stderr,"seek failed: %d\n",ret);
- exit(1);
- }
- if(ov_pcm_tell(&ov)!=((val>>hs)<<hs)){
- fprintf(stderr,"Declared position didn't perfectly match request: %ld != %ld\n",
- (long)val,(long)ov_pcm_tell(&ov));
- exit(1);
- }
-
- _verify(&ov,-1,val,-1.,pcmlength,bigassbuffer);
-
- }
- }
-
- fprintf(stderr,"\r");
- {
- fprintf(stderr,"testing time page seeking to random places in %f seconds....\n",
- timelength);
-
- for(i=0;i<1000;i++){
- double val=(double)rand()/RAND_MAX*timelength;
- fprintf(stderr,"\r\t%d [time position %f]... ",i,val);
- ret=ov_time_seek_page(&ov,val);
- if(ret<0){
- fprintf(stderr,"seek failed: %d\n",ret);
- exit(1);
- }
-
- _verify(&ov,-1,-1,val,pcmlength,bigassbuffer);
-
- }
- }
-
- fprintf(stderr,"\r");
- {
- fprintf(stderr,"testing time exact seeking to random places in %f seconds....\n",
- timelength);
-
- for(i=0;i<1000;i++){
- double val=(double)rand()/RAND_MAX*timelength;
- fprintf(stderr,"\r\t%d [time position %f]... ",i,val);
- ret=ov_time_seek(&ov,val);
- if(ret<0){
- fprintf(stderr,"seek failed: %d\n",ret);
- exit(1);
- }
- if(ov_time_tell(&ov)<val-1 || ov_time_tell(&ov)>val+1){
- fprintf(stderr,"Declared position didn't perfectly match request: %f != %f\n",
- val,ov_time_tell(&ov));
- exit(1);
- }
-
- _verify(&ov,-1,-1,val,pcmlength,bigassbuffer);
-
- }
- }
-
- fprintf(stderr,"\r \nOK.\n\n");
-
-
- }else{
- fprintf(stderr,"Standard input was not seekable.\n");
- }
-
- ov_clear(&ov);
- return 0;
-}
-
-
-
-
-
-
-
-
-
-
-
-
-
generated by cgit v1.1 at 2024-11-05 01:52:29 +0000