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avformat/utils: reorder operations in update_wrap_reference() 

prevents a integer overflow

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-12-04 14:29:35 +01:00
parent f1783c05f1
commit 34b16e2d36
1 changed files with 2 additions and 4 deletions
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6
libavformat/utils.c
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@ -887,12 +887,11 @@ static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_in
if (ref == AV_NOPTS_VALUE)
ref = pkt->pts;
if (ref == AV_NOPTS_VALUE)
if (st->pts_wrap_reference != AV_NOPTS_VALUE || st->pts_wrap_bits >= 63 || ref == AV_NOPTS_VALUE || !s->correct_ts_overflow)
return 0;
ref &= (1LL<<st->pts_wrap_bits)-1;
if (s->correct_ts_overflow && st->pts_wrap_bits < 63 &&
st->pts_wrap_reference == AV_NOPTS_VALUE) {
{
int i;
// reference time stamp should be 60 s before first time stamp
@ -945,7 +944,6 @@ static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_in
}
return 1;
}
return 0;
}
static void update_initial_timestamps(AVFormatContext *s, int stream_index,