}
/* save a tiny smidge of verbosity to make the code more readable */
-static void _seek_helper(OggVorbis_File *vf,ogg_int64_t offset){
+static int _seek_helper(OggVorbis_File *vf,ogg_int64_t offset){
if(vf->datasource){
- (vf->callbacks.seek_func)(vf->datasource, offset, SEEK_SET);
+ if((vf->callbacks.seek_func)(vf->datasource, offset, SEEK_SET) == -1)
+ return OV_EREAD;
vf->offset=offset;
ogg_sync_reset(&vf->oy);
}else{
/* shouldn't happen unless someone writes a broken callback */
- return;
+ return OV_EFAULT;
}
+ return 0;
}
/* The read/seek functions track absolute position within the stream */
begin-=CHUNKSIZE;
if(begin<0)
begin=0;
- _seek_helper(vf,begin);
+
+ ret=_seek_helper(vf,begin);
+ if(ret)return(ret);
+
while(vf->offset<end){
ret=_get_next_page(vf,og,end-vf->offset);
if(ret==OV_EREAD)return(OV_EREAD);
}
/* we have the offset. Actually snork and hold the page now */
- _seek_helper(vf,offset);
+ ret=_seek_helper(vf,offset);
+ if(ret)return(ret);
+
ret=_get_next_page(vf,og,CHUNKSIZE);
if(ret<0)
/* this shouldn't be possible */
bisect=(searched+endsearched)/2;
}
- _seek_helper(vf,bisect);
+ ret=_seek_helper(vf,bisect);
+ if(ret)return(ret);
+
ret=_get_next_page(vf,&og,-1);
if(ret==OV_EREAD)return(OV_EREAD);
if(ret<0 || ogg_page_serialno(&og)!=currentno){
}
}
- _seek_helper(vf,next);
+ ret=_seek_helper(vf,next);
+ if(ret)return(ret);
+
ret=_get_next_page(vf,&og,-1);
if(ret==OV_EREAD)return(OV_EREAD);
if(i==0){
/* we already grabbed the initial header earlier. Just set the offset */
vf->dataoffsets[i]=dataoffset;
- _seek_helper(vf,dataoffset);
+ ret=_seek_helper(vf,dataoffset);
+ if(ret)
+ vf->dataoffsets[i]=-1;
}else{
/* seek to the location of the initial header */
- _seek_helper(vf,vf->offsets[i]);
- if(_fetch_headers(vf,vf->vi+i,vf->vc+i,NULL,NULL)<0){
- vf->dataoffsets[i]=-1;
+ ret=_seek_helper(vf,vf->offsets[i]);
+ if(ret){
+ vf->dataoffsets[i]=-1;
}else{
- vf->dataoffsets[i]=vf->offset;
+ if(_fetch_headers(vf,vf->vi+i,vf->vc+i,NULL,NULL)<0){
+ vf->dataoffsets[i]=-1;
+ }else{
+ vf->dataoffsets[i]=vf->offset;
+ }
}
}
get the last page of the stream */
{
ogg_int64_t end=vf->offsets[i+1];
- _seek_helper(vf,end);
-
- while(1){
- ret=_get_prev_page(vf,&og);
- if(ret<0){
- /* this should not be possible */
- vorbis_info_clear(vf->vi+i);
- vorbis_comment_clear(vf->vc+i);
- break;
- }
- if(ogg_page_granulepos(&og)!=-1){
- vf->pcmlengths[i*2+1]=ogg_page_granulepos(&og)-vf->pcmlengths[i*2];
- break;
+ ret=_seek_helper(vf,end);
+ if(ret){
+ /* this should not be possible */
+ vorbis_info_clear(vf->vi+i);
+ vorbis_comment_clear(vf->vc+i);
+ }else{
+
+ while(1){
+ ret=_get_prev_page(vf,&og);
+ if(ret<0){
+ /* this should not be possible */
+ vorbis_info_clear(vf->vi+i);
+ vorbis_comment_clear(vf->vc+i);
+ break;
+ }
+ if(ogg_page_granulepos(&og)!=-1){
+ vf->pcmlengths[i*2+1]=ogg_page_granulepos(&og)-vf->pcmlengths[i*2];
+ break;
+ }
+ vf->offset=ret;
}
- vf->offset=ret;
}
}
}
int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos){
ogg_stream_state work_os;
+ int ret;
if(vf->ready_state<OPENED)return(OV_EINVAL);
if(!vf->seekable)
vf->current_serialno); /* must set serialno */
vorbis_synthesis_restart(&vf->vd);
- _seek_helper(vf,pos);
+ ret=_seek_helper(vf,pos);
+ if(ret)return(ret);
/* we need to make sure the pcm_offset is set, but we don't want to
advance the raw cursor past good packets just to get to the first
int link=-1;
ogg_int64_t result=0;
ogg_int64_t total=ov_pcm_total(vf,-1);
-
+
if(vf->ready_state<OPENED)return(OV_EINVAL);
if(!vf->seekable)return(OV_ENOSEEK);
bisect=begin+1;
}
- _seek_helper(vf,bisect);
-
+ result=_seek_helper(vf,bisect);
+ if(result) goto seek_error;
+
while(begin<end){
result=_get_next_page(vf,&og,end-vf->offset);
if(result==OV_EREAD) goto seek_error;
if(bisect==0) goto seek_error;
bisect-=CHUNKSIZE;
if(bisect<=begin)bisect=begin+1;
- _seek_helper(vf,bisect);
+ result=_seek_helper(vf,bisect);
+ if(result) goto seek_error;
}
}else{
ogg_int64_t granulepos=ogg_page_granulepos(&og);
end=result;
bisect-=CHUNKSIZE; /* an endless loop otherwise. */
if(bisect<=begin)bisect=begin+1;
- _seek_helper(vf,bisect);
+ result=_seek_helper(vf,bisect);
+ if(result) goto seek_error;
}else{
end=result;
endtime=granulepos;
ogg_packet op;
/* seek */
- _seek_helper(vf,best);
+ result=_seek_helper(vf,best);
vf->pcm_offset=-1;
-
- if(_get_next_page(vf,&og,-1)<0)return(OV_EOF); /* shouldn't happen */
+ if(result) goto seek_error;
+ result=_get_next_page(vf,&og,-1);
+ if(result<0) goto seek_error;
if(link!=vf->current_link){
/* Different link; dump entire decode machine */
get one with a granulepos or without the 'continued' flag
set. Then just use raw_seek for simplicity. */
- _seek_helper(vf,best);
+ result=_seek_helper(vf,best);
+ if(result<0) goto seek_error;
while(1){
result=_get_prev_page(vf,&og);