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playbin2: Check if an already existing sink supports the non-raw format too

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Before we were assuming that a sink will always support all non-raw formats
in a single stream.
This commit is contained in:
Sebastian Dröge 2011-03-16 15:27:51 +01:00
parent b0ef98001f
commit 9c13edef4e
1 changed files with 57 additions and 43 deletions
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86
gst/playback/gstplaybin2.c
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@ -3045,6 +3045,33 @@ done:
return ret;
}
static gboolean
sink_accepts_caps (GstElement * sink, GstCaps * caps)
{
GstPad *sinkpad;
/* ... activate it ... We do this before adding it to the bin so that we
* don't accidentally make it post error messages that will stop
* everything. */
if (GST_STATE (sink) < GST_STATE_READY &&
gst_element_set_state (sink,
GST_STATE_READY) == GST_STATE_CHANGE_FAILURE) {
return FALSE;
}
if ((sinkpad = gst_element_get_static_pad (sink, "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_object_unref (sinkpad);
return FALSE;
}
gst_object_unref (sinkpad);
}
return TRUE;
}
/* We are asked to select an element. See if the next element to check
* is a sink. If this is the case, we see if the sink works by setting it to
* READY. If the sink works, we return SELECT_EXPOSE to make decodebin
@ -3058,7 +3085,6 @@ autoplug_select_cb (GstElement * decodebin, GstPad * pad,
const gchar *klass;
GstPlaySinkType type;
GstElement **sinkp;
GstPad *sinkpad;
playbin = group->playbin;
@ -3105,62 +3131,50 @@ autoplug_select_cb (GstElement * decodebin, GstPad * pad,
/* now see if we already have a sink element */
GST_SOURCE_GROUP_LOCK (group);
if (*sinkp) {
GST_DEBUG_OBJECT (playbin, "we already have a pending sink, expose pad");
/* for now, just assume that we can link the pad to this same sink. FIXME,
* check that we can link this new pad to this sink as well. */
GstElement *sink = gst_object_ref (*sinkp);
if (sink_accepts_caps (sink, caps)) {
GST_DEBUG_OBJECT (playbin,
"Existing sink '%s' accepts caps: %" GST_PTR_FORMAT,
GST_ELEMENT_NAME (sink), caps);
gst_object_unref (sink);
GST_SOURCE_GROUP_UNLOCK (group);
return GST_AUTOPLUG_SELECT_EXPOSE;
} else {
GST_DEBUG_OBJECT (playbin,
"Existing sink '%s' does not accept caps: %" GST_PTR_FORMAT,
GST_ELEMENT_NAME (sink), caps);
gst_object_unref (sink);
GST_SOURCE_GROUP_UNLOCK (group);
return GST_AUTOPLUG_SELECT_SKIP;
}
}
GST_DEBUG_OBJECT (playbin, "we have no pending sink, try to create one");
GST_SOURCE_GROUP_UNLOCK (group);
if ((element = gst_element_factory_create (factory, NULL)) == NULL) {
GST_WARNING_OBJECT (playbin, "Could not create an element from %s",
gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
GST_SOURCE_GROUP_UNLOCK (group);
return GST_AUTOPLUG_SELECT_SKIP;
}
/* ... activate it ... We do this before adding it to the bin so that we
* don't accidentally make it post error messages that will stop
* everything. */
if ((gst_element_set_state (element,
GST_STATE_READY)) == GST_STATE_CHANGE_FAILURE) {
GST_WARNING_OBJECT (playbin, "Couldn't set %s to READY",
GST_ELEMENT_NAME (element));
gst_object_unref (element);
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);
/* Check if the selected sink actually supports the
* caps and can be set to READY*/
if (!sink_accepts_caps (element, caps)) {
gst_element_set_state (element, GST_STATE_NULL);
gst_object_unref (element);
GST_SOURCE_GROUP_UNLOCK (group);
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);
if (*sinkp == NULL) {
/* store the sink in the group, we will configure it later when we
* ownership now
*
* store the sink in the group, we will configure it later when we
* reconfigure the sink */
GST_DEBUG_OBJECT (playbin, "remember sink");
gst_object_ref_sink (element);
*sinkp = element;
} else {
/* some other thread configured a sink while we were testing the sink, set
* the sink back to NULL and assume we can use the other sink */
GST_DEBUG_OBJECT (playbin, "another sink was found, expose pad");
gst_element_set_state (element, GST_STATE_NULL);
gst_object_unref (element);
}
GST_SOURCE_GROUP_UNLOCK (group);
/* tell decodebin to expose the pad because we are going to use this