ref: bf55730f78c7a635811222283fa1fdcb6fb02ffc
parent: 7be86aca965cb678337da39830cbf6b99f0ecece
author: Timothy B. Terriberry <tterribe@xiph.org>
date: Sun Sep 23 12:31:23 EDT 2012
Disable linear scan/matching in seeking_example. It's served its purpose, and isn't worth the time it takes now. Leaving the code around to make it easy to re-enable if necessary.
--- a/examples/seeking_example.c
+++ b/examples/seeking_example.c
@@ -265,15 +265,10 @@
}
if(op_seekable(of)){op_sample *bigassbuffer;
- op_sample smallerbuffer[120*48*8];
ogg_int64_t size;
- ogg_int64_t pcm_print_offset;
ogg_int64_t pcm_offset;
ogg_int64_t pcm_length;
ogg_int64_t nsamples;
- ogg_int64_t si;
- opus_int32 bitrate;
- int saw_hole;
int nlinks;
int ret;
int li;
@@ -289,11 +284,17 @@
for(li=0;li<nlinks;li++){nsamples+=op_pcm_total(of,li)*op_channel_count(of,li);
}
+/*Until we find another way to do the comparisons that solves the MATCH_TOL
+ problem, disable this.*/
+#if 0
bigassbuffer=_ogg_malloc(sizeof(*bigassbuffer)*nsamples);
if(bigassbuffer==NULL){fprintf(stderr,
"Buffer allocation failed. Seek offset detection disabled.\n");
}
+#else
+ bigassbuffer=NULL;
+#endif
pcm_offset=op_pcm_tell(of);
if(pcm_offset!=0){fprintf(stderr,"Initial PCM offset was not 0, got %li instead.!\n",
@@ -300,53 +301,61 @@
(long)pcm_offset);
exit(EXIT_FAILURE);
}
- pcm_print_offset=pcm_offset-48000;
- bitrate=0;
- saw_hole=0;
- for(si=0;si<nsamples;){- ogg_int64_t next_pcm_offset;
- opus_int32 next_bitrate;
- op_sample *buf;
- int buf_size;
- buf=bigassbuffer==NULL?smallerbuffer:bigassbuffer+si;
- buf_size=(int)OP_MIN(nsamples-si,
- (int)(sizeof(smallerbuffer)/sizeof(*smallerbuffer))),
- ret=op_read_native(of,buf,buf_size,&li);
- if(ret==OP_HOLE){- /*Only warn once in a row.*/
- if(saw_hole)continue;
- saw_hole=1;
- /*This is just a warning.
- As long as the timestamps are still contiguous we're okay.*/
- fprintf(stderr,"\nHole in PCM data at sample %li\n",(long)pcm_offset);
- continue;
- }
- else if(ret<=0){- fprintf(stderr,"\nFailed to read PCM data: %i\n",ret);
- exit(EXIT_FAILURE);
- }
+/*Disabling the linear scan for now.
+ Only test on non-borken files!*/
+#if 0
+ {+ op_sample smallerbuffer[120*48*8];
+ ogg_int64_t pcm_print_offset;
+ ogg_int64_t si;
+ opus_int32 bitrate;
+ int saw_hole;
+ pcm_print_offset=pcm_offset-48000;
+ bitrate=0;
saw_hole=0;
- /*If we have gaps in the PCM positions, seeking is not likely to work
- near them.*/
- next_pcm_offset=op_pcm_tell(of);
- if(pcm_offset+ret!=next_pcm_offset){- fprintf(stderr,"\nGap in PCM offset: expecting %li, got %li\n",
- (long)(pcm_offset+ret),(long)next_pcm_offset);
- exit(EXIT_FAILURE);
+ for(si=0;si<nsamples;){+ ogg_int64_t next_pcm_offset;
+ opus_int32 next_bitrate;
+ op_sample *buf;
+ int buf_size;
+ buf=bigassbuffer==NULL?smallerbuffer:bigassbuffer+si;
+ buf_size=(int)OP_MIN(nsamples-si,
+ (int)(sizeof(smallerbuffer)/sizeof(*smallerbuffer))),
+ ret=op_read_native(of,buf,buf_size,&li);
+ if(ret==OP_HOLE){+ /*Only warn once in a row.*/
+ if(saw_hole)continue;
+ saw_hole=1;
+ /*This is just a warning.
+ As long as the timestamps are still contiguous we're okay.*/
+ fprintf(stderr,"\nHole in PCM data at sample %li\n",
+ (long)pcm_offset);
+ continue;
+ }
+ else if(ret<=0){+ fprintf(stderr,"\nFailed to read PCM data: %i\n",ret);
+ exit(EXIT_FAILURE);
+ }
+ saw_hole=0;
+ /*If we have gaps in the PCM positions, seeking is not likely to work
+ near them.*/
+ next_pcm_offset=op_pcm_tell(of);
+ if(pcm_offset+ret!=next_pcm_offset){+ fprintf(stderr,"\nGap in PCM offset: expecting %li, got %li\n",
+ (long)(pcm_offset+ret),(long)next_pcm_offset);
+ exit(EXIT_FAILURE);
+ }
+ pcm_offset=next_pcm_offset;
+ si+=ret*op_channel_count(of,li);
+ if(pcm_offset>=pcm_print_offset+48000){+ next_bitrate=op_bitrate_instant(of);
+ if(next_bitrate>=0)bitrate=next_bitrate;
+ fprintf(stderr,"\r%s... [%li left] (%0.3f kbps) ",
+ bigassbuffer==NULL?"Scanning":"Loading",nsamples-si,bitrate/1000.0);
+ pcm_print_offset=pcm_offset;
+ }
}
- pcm_offset=next_pcm_offset;
- si+=ret*op_channel_count(of,li);
- if(pcm_offset>=pcm_print_offset+48000){- next_bitrate=op_bitrate_instant(of);
- if(next_bitrate>=0)bitrate=next_bitrate;
- fprintf(stderr,"\r%s... [%li left] (%0.3f kbps) ",
- bigassbuffer==NULL?"Scanning":"Loading",nsamples-si,bitrate/1000.0);
- pcm_print_offset=pcm_offset;
- }
- }
- {- op_sample tmp[8];
- ret=op_read_native(of,tmp,sizeof(tmp)/sizeof(*tmp),&li);
+ ret=op_read_native(of,smallerbuffer,8,&li);
if(ret<0){fprintf(stderr,"Failed to read PCM data: %i\n",ret);
exit(EXIT_FAILURE);
@@ -356,6 +365,7 @@
exit(EXIT_FAILURE);
}
}
+#endif
pcm_length=op_pcm_total(of,-1);
size=op_raw_total(of,-1);
fprintf(stderr,"\rLoaded (%0.3f kbps average). \n",