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rtpjitterbuffer: Take a running average of the packet spacings instead of just the latest

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=748041
This commit is contained in:
Sebastian Dröge 2015-04-22 19:41:07 +02:00
parent f81c9a9568
commit 3fe8ceff14
1 changed files with 21 additions and 2 deletions
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23
gst/rtpmanager/gstrtpjitterbuffer.c
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@ -2027,9 +2027,28 @@ calculate_packet_spacing (GstRtpJitterBuffer * jitterbuffer, guint32 rtptime,
if (priv->ips_rtptime != rtptime) {
/* rtptime changed, check dts diff */
if (priv->ips_dts != -1 && dts != -1 && dts > priv->ips_dts) {
priv->packet_spacing = dts - priv->ips_dts;
GstClockTime new_packet_spacing = dts - priv->ips_dts;
GstClockTime old_packet_spacing = priv->packet_spacing;
/* Biased towards bigger packet spacings to prevent
* too many unneeded retransmission requests for next
* packets that just arrive a little later than we would
* expect */
if (old_packet_spacing > new_packet_spacing)
priv->packet_spacing =
(new_packet_spacing + 3 * old_packet_spacing) / 4;
else if (old_packet_spacing > 0)
priv->packet_spacing =
(3 * new_packet_spacing + old_packet_spacing) / 4;
else
priv->packet_spacing = new_packet_spacing;
GST_DEBUG_OBJECT (jitterbuffer,
"new packet spacing %" GST_TIME_FORMAT,
"new packet spacing %" GST_TIME_FORMAT
" old packet spacing %" GST_TIME_FORMAT
" combined to %" GST_TIME_FORMAT,
GST_TIME_ARGS (new_packet_spacing),
GST_TIME_ARGS (old_packet_spacing),
GST_TIME_ARGS (priv->packet_spacing));
}
priv->ips_rtptime = rtptime;