TT#178400 ignore implausibly large jitter values

Change-Id: I26aa2699ee2fac79c8210d9ada3ea85df73bb06a

daemon/codec.c

@@ -3771,7 +3771,9 @@ void codec_calc_jitter(struct ssrc_ctx *ssrc, unsigned long ts, unsigned int clo
 	sec->transit = transit;
 	if (d < 0)
 		d = -d;
-	sec->jitter += d - ((sec->jitter + 8) >> 4);
+	// ignore implausibly large values
+	if (d < 100000)
+		sec->jitter += d - ((sec->jitter + 8) >> 4);
 	mutex_unlock(&sec->h.lock);
 }
 static void codec_calc_lost(struct ssrc_ctx *ssrc, uint16_t seq) {

kernel-module/xt_RTPENGINE.c

@@ -4443,7 +4443,9 @@ static void rtp_stats(struct rtpengine_target *g, struct rtp_parsed *rtp, s64 ar
 	s->transit = transit;
 	if (d < 0)
 		d = -d;
-	s->jitter += d - ((s->jitter + 8) >> 4);
+	// ignore implausibly large values
+	if (d < 100000)
+		s->jitter += d - ((s->jitter + 8) >> 4);
 
 	spin_unlock_irqrestore(&g->ssrc_stats_lock, flags);
 }