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avformat: prevent triggering request_probe assert in ff_read_packet 

If probe_codec is called with pkt == NULL, it sets probe_packets to 0
and request_probe to -1.
However, request_probe can change when calling s->iformat->read_packet
and thus a probe_packets value of 0 doesn't guarantee a request_probe
value of -1.
In that case calling probe_codec again is necessary to prevent
triggering the assert.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2016-10-19 19:23:49 +02:00
parent dfe7e5501d
commit a5b4476a60
1 changed files with 1 additions and 1 deletions
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2
libavformat/utils.c
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@ -803,7 +803,7 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
return ret;
for (i = 0; i < s->nb_streams; i++) {
st = s->streams[i];
if (st->probe_packets)
if (st->probe_packets || st->request_probe > 0)
if ((err = probe_codec(s, st, NULL)) < 0)
return err;
av_assert0(st->request_probe <= 0);