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cccombiner: Proxy POSITION/DURATION/URI/CAPS/ALLOCATION queries between video sinkpad and source pad

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We pass-through the video as is, only putting a GstMeta on it from the
caption sinkpad.

This fixes negotation problems caused by not passing through caps
queries in both directions.

Also handle CAPS/ACCEPT_CAPS queries directly for the caption pad
instead of proxying.
This commit is contained in:
Sebastian Dröge 2019-07-09 12:43:53 +03:00 committed by Sebastian Dröge
parent 8862abd7c6
commit dad6e51165
1 changed files with 103 additions and 0 deletions
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103
ext/closedcaption/gstcccombiner.c
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@ -462,6 +462,107 @@ gst_cc_combiner_update_src_caps (GstAggregator * agg,
return res;
}
static gboolean
gst_cc_combiner_src_query (GstAggregator * aggregator, GstQuery * query)
{
GstPad *video_sinkpad =
gst_element_get_static_pad (GST_ELEMENT_CAST (aggregator), "sink");
gboolean ret;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
case GST_QUERY_DURATION:
case GST_QUERY_URI:
case GST_QUERY_CAPS:
case GST_QUERY_ALLOCATION:
ret = gst_pad_peer_query (video_sinkpad, query);
break;
case GST_QUERY_ACCEPT_CAPS:{
GstCaps *caps;
GstCaps *templ = gst_static_pad_template_get_caps (&srctemplate);
gst_query_parse_accept_caps (query, &caps);
gst_query_set_accept_caps_result (query, gst_caps_is_subset (caps,
templ));
ret = TRUE;
break;
}
default:
ret = GST_AGGREGATOR_CLASS (parent_class)->src_query (aggregator, query);
break;
}
gst_object_unref (video_sinkpad);
return ret;
}
static gboolean
gst_cc_combiner_sink_query (GstAggregator * aggregator,
GstAggregatorPad * aggpad, GstQuery * query)
{
GstPad *video_sinkpad =
gst_element_get_static_pad (GST_ELEMENT_CAST (aggregator), "sink");
GstPad *srcpad = GST_AGGREGATOR_SRC_PAD (aggregator);
gboolean ret;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
case GST_QUERY_DURATION:
case GST_QUERY_URI:
case GST_QUERY_ALLOCATION:
if (GST_PAD_CAST (aggpad) == video_sinkpad) {
ret = gst_pad_peer_query (srcpad, query);
} else {
ret =
GST_AGGREGATOR_CLASS (parent_class)->src_query (aggregator, query);
}
break;
case GST_QUERY_CAPS:
if (GST_PAD_CAST (aggpad) == video_sinkpad) {
ret = gst_pad_peer_query (srcpad, query);
} else {
GstCaps *filter;
GstCaps *templ = gst_static_pad_template_get_caps (&captiontemplate);
gst_query_parse_caps (query, &filter);
if (filter) {
GstCaps *caps =
gst_caps_intersect_full (filter, templ, GST_CAPS_INTERSECT_FIRST);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
} else {
gst_query_set_caps_result (query, templ);
}
gst_caps_unref (templ);
ret = TRUE;
}
break;
case GST_QUERY_ACCEPT_CAPS:
if (GST_PAD_CAST (aggpad) == video_sinkpad) {
ret = gst_pad_peer_query (srcpad, query);
} else {
GstCaps *caps;
GstCaps *templ = gst_static_pad_template_get_caps (&captiontemplate);
gst_query_parse_accept_caps (query, &caps);
gst_query_set_accept_caps_result (query, gst_caps_is_subset (caps,
templ));
ret = TRUE;
}
break;
default:
ret = GST_AGGREGATOR_CLASS (parent_class)->src_query (aggregator, query);
break;
}
gst_object_unref (video_sinkpad);
return ret;
}
static void
gst_cc_combiner_class_init (GstCCCombinerClass * klass)
{
@ -495,6 +596,8 @@ gst_cc_combiner_class_init (GstCCCombinerClass * klass)
aggregator_class->sink_event = gst_cc_combiner_sink_event;
aggregator_class->update_src_caps = gst_cc_combiner_update_src_caps;
aggregator_class->get_next_time = gst_aggregator_simple_get_next_time;
aggregator_class->src_query = gst_cc_combiner_src_query;
aggregator_class->sink_query = gst_cc_combiner_sink_query;
GST_DEBUG_CATEGORY_INIT (gst_cc_combiner_debug, "cccombiner",
0, "Closed Caption combiner");