Remove svn $Id$ header.

[platform/upstream/libvorbis.git] / examples / seeking_example.c

diff --git a/examples/seeking_example.c b/examples/seeking_example.c
index a968a81..1073b31 100644 (file)
--- a/examples/seeking_example.c
+++ b/examples/seeking_example.c
@@ -11,7 +11,6 @@
  ********************************************************************
 
  function: illustrate seeking, and test it too
- last mod: $Id$
 
  ********************************************************************/
 
@@ -29,11 +28,13 @@ 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){
@@ -58,15 +59,24 @@ void _verify(OggVorbis_File *ov,
   }
   bread=ov_read(ov,buffer,4096,1,1,1,&dummy);
   for(j=0;j<bread;j++){
-    if(buffer[j]!=bigassbuffer[j+pos*2]){
-      fprintf(stderr,"data position after seek doesn't match pcm position\n");
-
+    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\n",(int)buffer[j]);
+        for(j=0;j<bread;j++)fprintf(f,"%d %d\n",j,(int)buffer[j]);
         fclose(f);
         f=fopen("b.m","w");
-        for(j=0;j<bread;j++)fprintf(f,"%d\n",(int)bigassbuffer[j+pos*2]);
+        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);
       }
 
@@ -82,6 +92,7 @@ int main(){
   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 );
@@ -94,6 +105,14 @@ int main(){
     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
@@ -107,15 +126,15 @@ int main(){
         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*2); /* w00t */
+    bigassbuffer=malloc((pcmlength>>hs)*2); /* w00t */
     i=0;
-    while(i<pcmlength*2){
-      int ret=ov_read(&ov,bigassbuffer+i,pcmlength*2-i,1,1,1,&dummy);
+    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);
@@ -123,17 +142,17 @@ int main(){
       if(ret){
         i+=ret;
       }else{
-        pcmlength=i/2;
+        pcmlength=(i/2)<<hs;
       }
       fprintf(stderr,"\rloading.... [%ld left]              ",
-              (long)(pcmlength*2-i));
+              (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);
@@ -152,9 +171,9 @@ int main(){
     {
       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=(double)rand()/RAND_MAX*pcmlength;
+        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){
@@ -166,21 +185,20 @@ int main(){
 
       }
     }
-    
+
     fprintf(stderr,"\r");
     {
-      fprintf(stderr,"testing pcm exact seeking to random places in %ld samples....\n",
-             (long)pcmlength);
-    
+      fprintf(stderr,"testing pcm exact seeking to random places in %f seconds....\n",
+             timelength);
       for(i=0;i<1000;i++){
-        ogg_int64_t val=(double)rand()/RAND_MAX*pcmlength;
+        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){
+        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);