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aggregator: add latency query handling

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This commit is contained in:
Matthew Waters 2014-10-06 21:46:24 +11:00
parent 22da31f42a
commit 57c8272c75
1 changed files with 4 additions and 87 deletions
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91
gst/audiomixer/gstaudiomixer.c
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@ -511,91 +511,6 @@ gst_audiomixer_query_duration (GstAudioMixer * audiomixer, GstQuery * query)
return res;
}
static gboolean
gst_audiomixer_query_latency (GstAudioMixer * audiomixer, GstQuery * query)
{
GstClockTime min, max;
gboolean live;
gboolean res;
GstIterator *it;
gboolean done;
GValue item = { 0, };
res = TRUE;
done = FALSE;
live = FALSE;
min = 0;
max = GST_CLOCK_TIME_NONE;
/* Take maximum of all latency values */
it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (audiomixer));
while (!done) {
GstIteratorResult ires;
ires = gst_iterator_next (it, &item);
switch (ires) {
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_OK:
{
GstPad *pad = g_value_get_object (&item);
GstQuery *peerquery;
GstClockTime min_cur, max_cur;
gboolean live_cur;
peerquery = gst_query_new_latency ();
/* Ask peer for latency */
res &= gst_pad_peer_query (pad, peerquery);
/* take max from all valid return values */
if (res) {
gst_query_parse_latency (peerquery, &live_cur, &min_cur, &max_cur);
if (min_cur > min)
min = min_cur;
if (max_cur != GST_CLOCK_TIME_NONE &&
((max != GST_CLOCK_TIME_NONE && max_cur > max) ||
(max == GST_CLOCK_TIME_NONE)))
max = max_cur;
live = live || live_cur;
}
gst_query_unref (peerquery);
g_value_reset (&item);
break;
}
case GST_ITERATOR_RESYNC:
live = FALSE;
min = 0;
max = GST_CLOCK_TIME_NONE;
res = TRUE;
gst_iterator_resync (it);
break;
default:
res = FALSE;
done = TRUE;
break;
}
}
g_value_unset (&item);
gst_iterator_free (it);
if (res) {
/* store the results */
GST_DEBUG_OBJECT (audiomixer, "Calculated total latency: live %s, min %"
GST_TIME_FORMAT ", max %" GST_TIME_FORMAT,
(live ? "yes" : "no"), GST_TIME_ARGS (min), GST_TIME_ARGS (max));
gst_query_set_latency (query, live, min, max);
}
return res;
}
static gboolean
gst_audiomixer_src_query (GstAggregator * agg, GstQuery * query)
{
@ -628,7 +543,9 @@ gst_audiomixer_src_query (GstAggregator * agg, GstQuery * query)
res = gst_audiomixer_query_duration (audiomixer, query);
break;
case GST_QUERY_LATENCY:
res = gst_audiomixer_query_latency (audiomixer, query);
res =
GST_AGGREGATOR_CLASS (gst_audiomixer_parent_class)->src_query
(agg, query);
break;
default:
/* FIXME, needs a custom query handler because we have multiple
@ -783,7 +700,7 @@ gst_audiomixer_sink_event (GstAggregator * agg, GstAggregatorPad * aggpad,
}
static void
gst_audiomixer_reset (GstAudioMixer *audiomixer)
gst_audiomixer_reset (GstAudioMixer * audiomixer)
{
audiomixer->offset = 0;
gst_caps_replace (&audiomixer->current_caps, NULL);