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jitterbuffer: do skew estimation only for new timestamps

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Only run the skew estimation code when we have a new RTP timestamp. If we have
the same RTP timestamp, we simply use the previous estimation. This works
because the new observation with the same RTP timestamp has to have a bigger
receiver time and is thus not going to influence the estimation except for
causing more jitter.

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=640023
This commit is contained in:
Wim Taymans 2013-02-06 17:15:11 +01:00
parent 640de61740
commit c3077012c0
1 changed files with 3 additions and 0 deletions
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3
gst/rtpmanager/rtpjitterbuffer.c
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@ -373,6 +373,9 @@ calculate_skew (RTPJitterBuffer * jbuf, guint32 rtptime, GstClockTime time,
ext_rtptime = gst_rtp_buffer_ext_timestamp (&jbuf->ext_rtptime, rtptime);
if (jbuf->last_rtptime != -1 && ext_rtptime == jbuf->last_rtptime)
return jbuf->prev_out_time;
gstrtptime = gst_util_uint64_scale_int (ext_rtptime, GST_SECOND, clock_rate);
/* keep track of the last extended rtptime */