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playbin2: Check if an element accepts requisite caps before selecting

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In addition to ensuring that an element we want to select in
autoplug-select can enter the READY state, we also now check if it can
accept the caps we wish to plug it for. This is handy for sinks that
need to perform a probe to figure out whether they can actually handle a
given format.
This commit is contained in:
Arun Raghavan 2011-03-10 19:04:51 +05:30 committed by Sebastian Dröge
parent b76efc7f5d
commit b0ef98001f
1 changed files with 15 additions and 0 deletions
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15
gst/playback/gstplaybin2.c
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@ -3058,6 +3058,7 @@ autoplug_select_cb (GstElement * decodebin, GstPad * pad,
const gchar *klass;
GstPlaySinkType type;
GstElement **sinkp;
GstPad *sinkpad;
playbin = group->playbin;
@ -3130,6 +3131,20 @@ autoplug_select_cb (GstElement * decodebin, GstPad * pad,
return GST_AUTOPLUG_SELECT_SKIP;
}
if ((sinkpad = gst_element_get_static_pad (element, "sink"))) {
/* Got the sink pad, now let's see if the element actually does accept the
* caps that we have */
if (!gst_pad_accept_caps (sinkpad, caps)) {
GST_DEBUG_OBJECT (playbin, "%s doesn't accept our caps",
GST_ELEMENT_NAME (element));
gst_object_unref (sinkpad);
gst_element_set_state (element, GST_STATE_NULL);
gst_object_unref (element);
return GST_AUTOPLUG_SELECT_SKIP;
}
gst_object_unref (sinkpad);
}
/* remember the sink in the group now, the element is floating, we take
* ownership now */
GST_SOURCE_GROUP_LOCK (group);