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tsdemux: Report latency (700ms)

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This commit is contained in:
Edward Hervey 2011-11-08 20:12:50 +01:00
parent c492b00b69
commit 8f433e1677
1 changed files with 25 additions and 0 deletions
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25
gst/mpegtsdemux/tsdemux.c
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@ -395,6 +395,7 @@ gst_ts_demux_srcpad_query_types (GstPad * pad)
static const GstQueryType query_types[] = {
GST_QUERY_DURATION,
GST_QUERY_SEEKING,
GST_QUERY_LATENCY,
0
};
@ -425,6 +426,30 @@ gst_ts_demux_srcpad_query (GstPad * pad, GstQuery * query)
res = FALSE;
}
break;
case GST_QUERY_LATENCY:
{
GST_DEBUG ("query latency");
res = gst_pad_peer_query (base->sinkpad, query);
if (res && base->upstream_live) {
GstClockTime min_lat, max_lat;
gboolean live;
/* According to H.222.0
Annex D.0.3 (System Time Clock recovery in the decoder)
and D.0.2 (Audio and video presentation synchronization)
We can end up with an interval of up to 700ms between valid
PCR/SCR. We therefore allow a latency of 700ms for that.
*/
gst_query_parse_latency (query, &live, &min_lat, &max_lat);
if (min_lat != -1)
min_lat += 700 * GST_MSECOND;
if (max_lat != -1)
max_lat += 700 * GST_MSECOND;
gst_query_set_latency (query, live, min_lat, max_lat);
}
}
break;
case GST_QUERY_SEEKING:
GST_DEBUG ("query seeking");
gst_query_parse_seeking (query, &format, NULL, NULL, NULL);