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rtpdec: fix issue with conversion from unsigned to signed 

When receiving an RTCP packet, the difference between the last RTCP
timestamp and the base timestamp may be negative. As these timestamps
are of the uint32_t type, the result becomes a large integer. Cast
the difference to int32_t to avoid this issue.

The result of this issue is very large start times for RTSP
streams, and difficulty to restart correctly after a pause.

Signed-off-by: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Gilles Chanteperdrix 2015-02-20 07:14:53 +01:00 committed by Martin Storsjö
parent ff394ca087
commit 1ec28a66f2
1 changed files with 1 additions and 1 deletions
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2
libavformat/rtpdec.c
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@ -143,7 +143,7 @@ static int rtcp_parse_packet(RTPDemuxContext *s, const unsigned char *buf,
s->first_rtcp_ntp_time = s->last_rtcp_ntp_time;
if (!s->base_timestamp)
s->base_timestamp = s->last_rtcp_timestamp;
s->rtcp_ts_offset = s->last_rtcp_timestamp - s->base_timestamp;
s->rtcp_ts_offset = (int32_t)(s->last_rtcp_timestamp - s->base_timestamp);
}
break;