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avformat/utils: assert position monotonicity in ff_find_last_ts()

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This ensures that no read timestamp functions finds packets before the search window in ff_find_last_ts()
which could cause an infinite loop

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-09-04 00:58:16 +02:00
parent a660991921
commit e5c338ba7a
1 changed files with 1 additions and 0 deletions
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libavformat/utils.c
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@ -1779,6 +1779,7 @@ int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *
int64_t tmp_ts = ff_read_timestamp(s, stream_index, &tmp_pos, INT64_MAX, read_timestamp);
if(tmp_ts == AV_NOPTS_VALUE)
break;
av_assert0(tmp_pos > pos_max);
ts_max = tmp_ts;
pos_max = tmp_pos;
if(tmp_pos >= filesize)