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pwg: fix more negotiation for 1.0

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This commit is contained in:
Wim Taymans 2012-09-28 10:04:51 +02:00
parent 4710b36bda
commit 58d21a49d1
1 changed files with 48 additions and 16 deletions
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64
docs/pwg/advanced-negotiation.xml
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@ -423,26 +423,58 @@ gst_my_filter_chain (GstPad *pad,
#include "init.func"
--><!-- example-end getcaps.c a -->
<!-- example-begin getcaps.c b -->
static GstCaps *
gst_my_filter_getcaps (GstPad *pad)
static gboolean
gst_my_filter_query (GstPad *pad, GstObject * parent, GstQuery * query)
{
GstMyFilter *filter = GST_MY_FILTER (GST_OBJECT_PARENT (pad));
GstPad *otherpad = (pad == filter-&gt;srcpad) ? filter-&gt;sinkpad :
filter-&gt;srcpad;
GstCaps *othercaps = gst_pad_get_allowed_caps (otherpad), *caps;
gint i;
gboolean ret;
GstMyFilter *filter = GST_MY_FILTER (parent);
/* We support *any* samplerate, indifferent from the samplerate
* supported by the linked elements on both sides. */
for (i = 0; i &lt; gst_caps_get_size (othercaps); i++) {
GstStructure *structure = gst_caps_get_structure (othercaps, i);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS
{
GstPad *otherpad;
GstCaps *temp, *caps, *filter, *tcaps;
gint i;
gst_structure_remove_field (structure, "rate");
otherpad = (pad == filter-&gt;srcpad) ? filter-&gt;sinkpad :
filter-&gt;srcpad;
caps = gst_pad_get_allowed_caps (otherpad);
gst_query_parse_caps (query, &amp;filter);
/* We support *any* samplerate, indifferent from the samplerate
* supported by the linked elements on both sides. */
for (i = 0; i &lt; gst_caps_get_size (caps); i++) {
GstStructure *structure = gst_caps_get_structure (caps, i);
gst_structure_remove_field (structure, "rate");
}
/* make sure we only return results that intersect our
* padtemplate */
tcaps = gst_pad_get_pad_template_caps (pad);
if (tcaps) {
temp = gst_caps_intersect (caps, tcaps);
gst_caps_unref (caps);
gst_caps_unref (tcaps);
caps = temp;
}
/* filter against the query filter when needed */
if (filter) {
temp = gst_caps_intersect (caps, filter);
gst_caps_unref (caps);
caps = temp;
}
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
ret = TRUE;
break;
}
default:
ret = gst_pad_query_default (pad, parent, query);
break;
}
caps = gst_caps_intersect (othercaps, gst_pad_get_pad_template_caps (pad));
gst_caps_unref (othercaps);
return caps;
return ret;
}
<!-- example-end getcaps.c b -->
<!-- example-begin getcaps.c c --><!--