gstreamer/gst/autodetect/gstautovideosink.c

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/* GStreamer
* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. ... Original commit message from CVS: * ext/gconf/Makefile.am: * ext/gconf/gconf.c: (gst_gconf_get_string), (gst_gconf_get_key_for_sink_profile), (gst_gconf_set_string), (gst_gconf_render_bin_with_default): * ext/gconf/gconf.h: * ext/gconf/gstgconfaudiosink.c: (gst_gconf_audio_sink_base_init), (gst_gconf_audio_sink_reset), (gst_gconf_audio_sink_init), (gst_gconf_audio_sink_dispose), (do_change_child), (gst_gconf_switch_profile), (gst_gconf_audio_sink_set_property), (cb_change_child), (gst_gconf_audio_sink_change_state): * ext/gconf/gstgconfaudiosink.h: * ext/gconf/gstswitchsink.c: (gst_switch_sink_base_init), (gst_switch_sink_class_init), (gst_switch_sink_reset), (gst_switch_sink_init), (gst_switch_sink_dispose), (gst_switch_commit_new_kid), (gst_switch_sink_set_child), (gst_switch_sink_set_property), (gst_switch_sink_handle_event), (gst_switch_sink_get_property), (gst_switch_sink_change_state): * ext/gconf/gstswitchsink.h: * gst/autodetect/gstautoaudiosink.c: (gst_auto_audio_sink_class_init), (gst_auto_audio_sink_dispose), (gst_auto_audio_sink_clear_kid), (gst_auto_audio_sink_reset), (gst_auto_audio_sink_detect): * gst/autodetect/gstautovideosink.c: (gst_auto_video_sink_class_init), (gst_auto_video_sink_dispose), (gst_auto_video_sink_clear_kid), (gst_auto_video_sink_reset), (gst_auto_video_sink_detect): Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. The end goal of this is an audio sink that can be changed on the fly, but at the moment it still only changes on the next READY transition.
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* (c) 2006 Jan Schmidt <thaytan@noraisin.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-autovideosink
* @see_also: autoaudiosink, ximagesink, xvimagesink, sdlvideosink
*
* <refsect2>
* <para>
* autovideosink is a video sink that automatically detects an appropriate
* video sink to use. It does so by scanning the registry for all elements
* that have <quote>Sink</quote> and <quote>Audio</quote> in the class field
* of their element information, and also have a non-zero autoplugging rank.
* </para>
* <title>Example launch line</title>
* <para>
* <programlisting>
* gst-launch -v -m videotestsrc ! autovideosink
* </programlisting>
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstautovideosink.h"
#include "gstautodetect.h"
static GstStateChangeReturn
gst_auto_video_sink_change_state (GstElement * element,
GstStateChange transition);
Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. ... Original commit message from CVS: * ext/gconf/Makefile.am: * ext/gconf/gconf.c: (gst_gconf_get_string), (gst_gconf_get_key_for_sink_profile), (gst_gconf_set_string), (gst_gconf_render_bin_with_default): * ext/gconf/gconf.h: * ext/gconf/gstgconfaudiosink.c: (gst_gconf_audio_sink_base_init), (gst_gconf_audio_sink_reset), (gst_gconf_audio_sink_init), (gst_gconf_audio_sink_dispose), (do_change_child), (gst_gconf_switch_profile), (gst_gconf_audio_sink_set_property), (cb_change_child), (gst_gconf_audio_sink_change_state): * ext/gconf/gstgconfaudiosink.h: * ext/gconf/gstswitchsink.c: (gst_switch_sink_base_init), (gst_switch_sink_class_init), (gst_switch_sink_reset), (gst_switch_sink_init), (gst_switch_sink_dispose), (gst_switch_commit_new_kid), (gst_switch_sink_set_child), (gst_switch_sink_set_property), (gst_switch_sink_handle_event), (gst_switch_sink_get_property), (gst_switch_sink_change_state): * ext/gconf/gstswitchsink.h: * gst/autodetect/gstautoaudiosink.c: (gst_auto_audio_sink_class_init), (gst_auto_audio_sink_dispose), (gst_auto_audio_sink_clear_kid), (gst_auto_audio_sink_reset), (gst_auto_audio_sink_detect): * gst/autodetect/gstautovideosink.c: (gst_auto_video_sink_class_init), (gst_auto_video_sink_dispose), (gst_auto_video_sink_clear_kid), (gst_auto_video_sink_reset), (gst_auto_video_sink_detect): Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. The end goal of this is an audio sink that can be changed on the fly, but at the moment it still only changes on the next READY transition.
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static void gst_auto_video_sink_dispose (GstAutoVideoSink * sink);
static void gst_auto_video_sink_clear_kid (GstAutoVideoSink * sink);
GST_BOILERPLATE (GstAutoVideoSink, gst_auto_video_sink, GstBin, GST_TYPE_BIN);
static const GstElementDetails gst_auto_video_sink_details =
GST_ELEMENT_DETAILS ("Auto video sink",
"Sink/Video",
"Wrapper video sink for automatically detected video sink",
Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. ... Original commit message from CVS: * ext/gconf/Makefile.am: * ext/gconf/gconf.c: (gst_gconf_get_string), (gst_gconf_get_key_for_sink_profile), (gst_gconf_set_string), (gst_gconf_render_bin_with_default): * ext/gconf/gconf.h: * ext/gconf/gstgconfaudiosink.c: (gst_gconf_audio_sink_base_init), (gst_gconf_audio_sink_reset), (gst_gconf_audio_sink_init), (gst_gconf_audio_sink_dispose), (do_change_child), (gst_gconf_switch_profile), (gst_gconf_audio_sink_set_property), (cb_change_child), (gst_gconf_audio_sink_change_state): * ext/gconf/gstgconfaudiosink.h: * ext/gconf/gstswitchsink.c: (gst_switch_sink_base_init), (gst_switch_sink_class_init), (gst_switch_sink_reset), (gst_switch_sink_init), (gst_switch_sink_dispose), (gst_switch_commit_new_kid), (gst_switch_sink_set_child), (gst_switch_sink_set_property), (gst_switch_sink_handle_event), (gst_switch_sink_get_property), (gst_switch_sink_change_state): * ext/gconf/gstswitchsink.h: * gst/autodetect/gstautoaudiosink.c: (gst_auto_audio_sink_class_init), (gst_auto_audio_sink_dispose), (gst_auto_audio_sink_clear_kid), (gst_auto_audio_sink_reset), (gst_auto_audio_sink_detect): * gst/autodetect/gstautovideosink.c: (gst_auto_video_sink_class_init), (gst_auto_video_sink_dispose), (gst_auto_video_sink_clear_kid), (gst_auto_video_sink_reset), (gst_auto_video_sink_detect): Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. The end goal of this is an audio sink that can be changed on the fly, but at the moment it still only changes on the next READY transition.
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"Ronald Bultje <rbultje@ronald.bitfreak.net>\n"
"Jan Schmidt <thaytan@noraisin.net");
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static void
gst_auto_video_sink_base_init (gpointer klass)
{
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (eklass,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_details (eklass, &gst_auto_video_sink_details);
}
static void
gst_auto_video_sink_class_init (GstAutoVideoSinkClass * klass)
{
Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. ... Original commit message from CVS: * ext/gconf/Makefile.am: * ext/gconf/gconf.c: (gst_gconf_get_string), (gst_gconf_get_key_for_sink_profile), (gst_gconf_set_string), (gst_gconf_render_bin_with_default): * ext/gconf/gconf.h: * ext/gconf/gstgconfaudiosink.c: (gst_gconf_audio_sink_base_init), (gst_gconf_audio_sink_reset), (gst_gconf_audio_sink_init), (gst_gconf_audio_sink_dispose), (do_change_child), (gst_gconf_switch_profile), (gst_gconf_audio_sink_set_property), (cb_change_child), (gst_gconf_audio_sink_change_state): * ext/gconf/gstgconfaudiosink.h: * ext/gconf/gstswitchsink.c: (gst_switch_sink_base_init), (gst_switch_sink_class_init), (gst_switch_sink_reset), (gst_switch_sink_init), (gst_switch_sink_dispose), (gst_switch_commit_new_kid), (gst_switch_sink_set_child), (gst_switch_sink_set_property), (gst_switch_sink_handle_event), (gst_switch_sink_get_property), (gst_switch_sink_change_state): * ext/gconf/gstswitchsink.h: * gst/autodetect/gstautoaudiosink.c: (gst_auto_audio_sink_class_init), (gst_auto_audio_sink_dispose), (gst_auto_audio_sink_clear_kid), (gst_auto_audio_sink_reset), (gst_auto_audio_sink_detect): * gst/autodetect/gstautovideosink.c: (gst_auto_video_sink_class_init), (gst_auto_video_sink_dispose), (gst_auto_video_sink_clear_kid), (gst_auto_video_sink_reset), (gst_auto_video_sink_detect): Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. The end goal of this is an audio sink that can be changed on the fly, but at the moment it still only changes on the next READY transition.
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GObjectClass *gobject_class;
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. ... Original commit message from CVS: * ext/gconf/Makefile.am: * ext/gconf/gconf.c: (gst_gconf_get_string), (gst_gconf_get_key_for_sink_profile), (gst_gconf_set_string), (gst_gconf_render_bin_with_default): * ext/gconf/gconf.h: * ext/gconf/gstgconfaudiosink.c: (gst_gconf_audio_sink_base_init), (gst_gconf_audio_sink_reset), (gst_gconf_audio_sink_init), (gst_gconf_audio_sink_dispose), (do_change_child), (gst_gconf_switch_profile), (gst_gconf_audio_sink_set_property), (cb_change_child), (gst_gconf_audio_sink_change_state): * ext/gconf/gstgconfaudiosink.h: * ext/gconf/gstswitchsink.c: (gst_switch_sink_base_init), (gst_switch_sink_class_init), (gst_switch_sink_reset), (gst_switch_sink_init), (gst_switch_sink_dispose), (gst_switch_commit_new_kid), (gst_switch_sink_set_child), (gst_switch_sink_set_property), (gst_switch_sink_handle_event), (gst_switch_sink_get_property), (gst_switch_sink_change_state): * ext/gconf/gstswitchsink.h: * gst/autodetect/gstautoaudiosink.c: (gst_auto_audio_sink_class_init), (gst_auto_audio_sink_dispose), (gst_auto_audio_sink_clear_kid), (gst_auto_audio_sink_reset), (gst_auto_audio_sink_detect): * gst/autodetect/gstautovideosink.c: (gst_auto_video_sink_class_init), (gst_auto_video_sink_dispose), (gst_auto_video_sink_clear_kid), (gst_auto_video_sink_reset), (gst_auto_video_sink_detect): Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. The end goal of this is an audio sink that can be changed on the fly, but at the moment it still only changes on the next READY transition.
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gobject_class = G_OBJECT_CLASS (klass);
gobject_class->dispose =
(GObjectFinalizeFunc) GST_DEBUG_FUNCPTR (gst_auto_video_sink_dispose);
eklass->change_state = GST_DEBUG_FUNCPTR (gst_auto_video_sink_change_state);
}
Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. ... Original commit message from CVS: * ext/gconf/Makefile.am: * ext/gconf/gconf.c: (gst_gconf_get_string), (gst_gconf_get_key_for_sink_profile), (gst_gconf_set_string), (gst_gconf_render_bin_with_default): * ext/gconf/gconf.h: * ext/gconf/gstgconfaudiosink.c: (gst_gconf_audio_sink_base_init), (gst_gconf_audio_sink_reset), (gst_gconf_audio_sink_init), (gst_gconf_audio_sink_dispose), (do_change_child), (gst_gconf_switch_profile), (gst_gconf_audio_sink_set_property), (cb_change_child), (gst_gconf_audio_sink_change_state): * ext/gconf/gstgconfaudiosink.h: * ext/gconf/gstswitchsink.c: (gst_switch_sink_base_init), (gst_switch_sink_class_init), (gst_switch_sink_reset), (gst_switch_sink_init), (gst_switch_sink_dispose), (gst_switch_commit_new_kid), (gst_switch_sink_set_child), (gst_switch_sink_set_property), (gst_switch_sink_handle_event), (gst_switch_sink_get_property), (gst_switch_sink_change_state): * ext/gconf/gstswitchsink.h: * gst/autodetect/gstautoaudiosink.c: (gst_auto_audio_sink_class_init), (gst_auto_audio_sink_dispose), (gst_auto_audio_sink_clear_kid), (gst_auto_audio_sink_reset), (gst_auto_audio_sink_detect): * gst/autodetect/gstautovideosink.c: (gst_auto_video_sink_class_init), (gst_auto_video_sink_dispose), (gst_auto_video_sink_clear_kid), (gst_auto_video_sink_reset), (gst_auto_video_sink_detect): Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. The end goal of this is an audio sink that can be changed on the fly, but at the moment it still only changes on the next READY transition.
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static void
gst_auto_video_sink_dispose (GstAutoVideoSink * sink)
{
gst_auto_video_sink_clear_kid (sink);
G_OBJECT_CLASS (parent_class)->dispose ((GObject *) sink);
}
static void
gst_auto_video_sink_clear_kid (GstAutoVideoSink * sink)
{
if (sink->kid) {
gst_element_set_state (sink->kid, GST_STATE_NULL);
gst_bin_remove (GST_BIN (sink), sink->kid);
sink->kid = NULL;
}
}
/*
* Hack to make initial linking work; ideally, this'd work even when
* no target has been assigned to the ghostpad yet.
*/
static void
gst_auto_video_sink_reset (GstAutoVideoSink * sink)
{
GstPad *targetpad;
Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. ... Original commit message from CVS: * ext/gconf/Makefile.am: * ext/gconf/gconf.c: (gst_gconf_get_string), (gst_gconf_get_key_for_sink_profile), (gst_gconf_set_string), (gst_gconf_render_bin_with_default): * ext/gconf/gconf.h: * ext/gconf/gstgconfaudiosink.c: (gst_gconf_audio_sink_base_init), (gst_gconf_audio_sink_reset), (gst_gconf_audio_sink_init), (gst_gconf_audio_sink_dispose), (do_change_child), (gst_gconf_switch_profile), (gst_gconf_audio_sink_set_property), (cb_change_child), (gst_gconf_audio_sink_change_state): * ext/gconf/gstgconfaudiosink.h: * ext/gconf/gstswitchsink.c: (gst_switch_sink_base_init), (gst_switch_sink_class_init), (gst_switch_sink_reset), (gst_switch_sink_init), (gst_switch_sink_dispose), (gst_switch_commit_new_kid), (gst_switch_sink_set_child), (gst_switch_sink_set_property), (gst_switch_sink_handle_event), (gst_switch_sink_get_property), (gst_switch_sink_change_state): * ext/gconf/gstswitchsink.h: * gst/autodetect/gstautoaudiosink.c: (gst_auto_audio_sink_class_init), (gst_auto_audio_sink_dispose), (gst_auto_audio_sink_clear_kid), (gst_auto_audio_sink_reset), (gst_auto_audio_sink_detect): * gst/autodetect/gstautovideosink.c: (gst_auto_video_sink_class_init), (gst_auto_video_sink_dispose), (gst_auto_video_sink_clear_kid), (gst_auto_video_sink_reset), (gst_auto_video_sink_detect): Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. The end goal of this is an audio sink that can be changed on the fly, but at the moment it still only changes on the next READY transition.
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/* Remove any existing element */
gst_auto_video_sink_clear_kid (sink);
/* fakesink placeholder */
sink->kid = gst_element_factory_make ("fakesink", "tempsink");
gst_bin_add (GST_BIN (sink), sink->kid);
/* pad */
targetpad = gst_element_get_pad (sink->kid, "sink");
gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad);
gst_object_unref (targetpad);
}
static void
gst_auto_video_sink_init (GstAutoVideoSink * sink,
GstAutoVideoSinkClass * g_class)
{
sink->pad = gst_ghost_pad_new_no_target ("sink", GST_PAD_SINK);
gst_element_add_pad (GST_ELEMENT (sink), sink->pad);
gst_auto_video_sink_reset (sink);
GST_OBJECT_FLAG_SET (sink, GST_ELEMENT_IS_SINK);
}
static gboolean
gst_auto_video_sink_factory_filter (GstPluginFeature * feature, gpointer data)
{
guint rank;
const gchar *klass;
/* we only care about element factories */
if (!GST_IS_ELEMENT_FACTORY (feature))
return FALSE;
/* video sinks */
klass = gst_element_factory_get_klass (GST_ELEMENT_FACTORY (feature));
if (!(strstr (klass, "Sink") && strstr (klass, "Video")))
return FALSE;
/* only select elements with autoplugging rank */
rank = gst_plugin_feature_get_rank (feature);
if (rank < GST_RANK_MARGINAL)
return FALSE;
return TRUE;
}
static gint
gst_auto_video_sink_compare_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
{
gint diff;
diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
if (diff != 0)
return diff;
return strcmp (gst_plugin_feature_get_name (f2),
gst_plugin_feature_get_name (f1));
}
static GstElement *
gst_auto_video_sink_find_best (GstAutoVideoSink * sink)
{
GstElement *choice = NULL;
GList *list, *walk;
gchar *child_name = g_strdup_printf ("%s-actual-sink",
GST_OBJECT_NAME (sink));
list = gst_registry_feature_filter (gst_registry_get_default (),
(GstPluginFeatureFilter) gst_auto_video_sink_factory_filter, FALSE, sink);
list = g_list_sort (list, (GCompareFunc) gst_auto_video_sink_compare_ranks);
for (walk = list; walk != NULL; walk = walk->next) {
GstElementFactory *f = GST_ELEMENT_FACTORY (walk->data);
GstElement *el;
GST_DEBUG_OBJECT (sink, "Trying %s", GST_PLUGIN_FEATURE (f)->name);
if ((el = gst_element_factory_create (f, child_name))) {
GstStateChangeReturn ret;
GST_DEBUG_OBJECT (sink, "Changing state to READY");
ret = gst_element_set_state (el, GST_STATE_READY);
if (ret == GST_STATE_CHANGE_SUCCESS) {
GST_DEBUG_OBJECT (sink, "success");
choice = el;
goto done;
}
GST_WARNING_OBJECT (sink, "Couldn't set READY: %d", ret);
ret = gst_element_set_state (el, GST_STATE_NULL);
if (ret != GST_STATE_CHANGE_SUCCESS)
GST_WARNING_OBJECT (sink,
"Couldn't set element to NULL prior to disposal.");
gst_object_unref (el);
}
}
done:
g_free (child_name);
gst_plugin_feature_list_free (list);
return choice;
}
static gboolean
gst_auto_video_sink_detect (GstAutoVideoSink * sink)
{
GstElement *esink;
GstPad *targetpad;
Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. ... Original commit message from CVS: * ext/gconf/Makefile.am: * ext/gconf/gconf.c: (gst_gconf_get_string), (gst_gconf_get_key_for_sink_profile), (gst_gconf_set_string), (gst_gconf_render_bin_with_default): * ext/gconf/gconf.h: * ext/gconf/gstgconfaudiosink.c: (gst_gconf_audio_sink_base_init), (gst_gconf_audio_sink_reset), (gst_gconf_audio_sink_init), (gst_gconf_audio_sink_dispose), (do_change_child), (gst_gconf_switch_profile), (gst_gconf_audio_sink_set_property), (cb_change_child), (gst_gconf_audio_sink_change_state): * ext/gconf/gstgconfaudiosink.h: * ext/gconf/gstswitchsink.c: (gst_switch_sink_base_init), (gst_switch_sink_class_init), (gst_switch_sink_reset), (gst_switch_sink_init), (gst_switch_sink_dispose), (gst_switch_commit_new_kid), (gst_switch_sink_set_child), (gst_switch_sink_set_property), (gst_switch_sink_handle_event), (gst_switch_sink_get_property), (gst_switch_sink_change_state): * ext/gconf/gstswitchsink.h: * gst/autodetect/gstautoaudiosink.c: (gst_auto_audio_sink_class_init), (gst_auto_audio_sink_dispose), (gst_auto_audio_sink_clear_kid), (gst_auto_audio_sink_reset), (gst_auto_audio_sink_detect): * gst/autodetect/gstautovideosink.c: (gst_auto_video_sink_class_init), (gst_auto_video_sink_dispose), (gst_auto_video_sink_clear_kid), (gst_auto_video_sink_reset), (gst_auto_video_sink_detect): Re-factor the gconfaudiosink into a "GstSwitchSink" base class and a child that implements the GConf key monitoring. The end goal of this is an audio sink that can be changed on the fly, but at the moment it still only changes on the next READY transition.
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gst_auto_video_sink_clear_kid (sink);
/* find element */
GST_DEBUG_OBJECT (sink, "Creating new kid");
if (!(esink = gst_auto_video_sink_find_best (sink)))
goto no_sink;
sink->kid = esink;
gst_bin_add (GST_BIN (sink), esink);
/* attach ghost pad */
GST_DEBUG_OBJECT (sink, "Re-assigning ghostpad");
targetpad = gst_element_get_pad (sink->kid, "sink");
gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad);
gst_object_unref (targetpad);
GST_DEBUG_OBJECT (sink, "done changing auto video sink");
return TRUE;
/* ERRORS */
no_sink:
{
GST_ELEMENT_ERROR (sink, LIBRARY, INIT, (NULL),
("Failed to find a supported video sink"));
return FALSE;
}
}
static GstStateChangeReturn
gst_auto_video_sink_change_state (GstElement * element,
GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstAutoVideoSink *sink = GST_AUTO_VIDEO_SINK (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_auto_video_sink_detect (sink))
return GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
gst_auto_video_sink_reset (sink);
break;
default:
break;
}
return ret;
}