shithub: opusfile

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Fix seeking near the start of saved live streams.

If a stream starts with a non-zero granpos, we would subtract 80 ms
 from the target time, and then report failure when the best page
 we could find (the first page in the link) had a granpos larger
 than that.
This worked for normal streams because the subtraction would fail
 (granpos can't wrap past -1) and we checked for that.

--- a/src/opusfile.c

+++ b/src/opusfile.c

@@ -2194,7 +2194,8 @@

   /*We discard the first 80 ms of data after a seek, so seek back that much

      farther.

     If we can't, simply seek to the beginning of the link.*/

-  if(OP_UNLIKELY(op_granpos_add(&_target_gp,_target_gp,-80*48)<0)){

+  if(OP_UNLIKELY(op_granpos_add(&_target_gp,_target_gp,-80*48)<0)

+   ||OP_UNLIKELY(op_granpos_cmp(_target_gp,pcm_start)<0)){

     _target_gp=pcm_start;

   }

   /*Special case seeking to the start of the link.*/