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/* GStreamer
* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.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-gconfvideosink
*
* This element outputs video to the videosink that has been configured in
* GConf by the user.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch filesrc location=foo.ogg ! decodebin ! ffmpegcolorspace ! gconfvideosink
* ]| Play on configured videosink
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstgconfelements.h"
#include "gstgconfvideosink.h"
static void gst_gconf_video_sink_dispose (GObject * object);
static void gst_gconf_video_sink_finalize (GstGConfVideoSink * sink);
static void cb_toggle_element (GConfClient * client,
guint connection_id, GConfEntry * entry, gpointer data);
static GstStateChangeReturn
gst_gconf_video_sink_change_state (GstElement * element,
GstStateChange transition);
GST_BOILERPLATE (GstGConfVideoSink, gst_gconf_video_sink, GstBin, GST_TYPE_BIN);
static void
gst_gconf_video_sink_base_init (gpointer klass)
{
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
static const GstElementDetails gst_gconf_video_sink_details =
GST_ELEMENT_DETAILS ("GConf video sink",
"Sink/Video",
"Video sink embedding the GConf-settings for video output",
"GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
gst_element_class_add_pad_template (eklass,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_details (eklass, &gst_gconf_video_sink_details);
}
static void
gst_gconf_video_sink_class_init (GstGConfVideoSinkClass * klass)
{
GObjectClass *oklass = G_OBJECT_CLASS (klass);
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
oklass->dispose = gst_gconf_video_sink_dispose;
oklass->finalize = (GObjectFinalizeFunc) gst_gconf_video_sink_finalize;
eklass->change_state = gst_gconf_video_sink_change_state;
}
/*
* Hack to make negotiation work.
*/
static gboolean
gst_gconf_video_sink_reset (GstGConfVideoSink * sink)
{
GstPad *targetpad;
/* fakesink */
if (sink->kid) {
gst_element_set_state (sink->kid, GST_STATE_NULL);
gst_bin_remove (GST_BIN (sink), sink->kid);
}
sink->kid = gst_element_factory_make ("fakesink", "testsink");
if (!sink->kid) {
GST_ERROR_OBJECT (sink, "Failed to create fakesink");
return FALSE;
}
gst_bin_add (GST_BIN (sink), sink->kid);
targetpad = gst_element_get_static_pad (sink->kid, "sink");
gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad);
gst_object_unref (targetpad);
g_free (sink->gconf_str);
sink->gconf_str = NULL;
return TRUE;
}
static void
gst_gconf_video_sink_init (GstGConfVideoSink * sink,
GstGConfVideoSinkClass * g_class)
{
sink->pad = gst_ghost_pad_new_no_target ("sink", GST_PAD_SINK);
gst_element_add_pad (GST_ELEMENT (sink), sink->pad);
gst_gconf_video_sink_reset (sink);
sink->client = gconf_client_get_default ();
gconf_client_add_dir (sink->client, GST_GCONF_DIR,
GCONF_CLIENT_PRELOAD_RECURSIVE, NULL);
sink->notify_id = gconf_client_notify_add (sink->client,
GST_GCONF_DIR "/" GST_GCONF_VIDEOSINK_KEY,
cb_toggle_element, sink, NULL, NULL);
}
static void
gst_gconf_video_sink_dispose (GObject * object)
{
GstGConfVideoSink *sink = GST_GCONF_VIDEO_SINK (object);
if (sink->client) {
if (sink->notify_id != 0)
gconf_client_notify_remove (sink->client, sink->notify_id);
g_object_unref (G_OBJECT (sink->client));
sink->client = NULL;
}
g_free (sink->gconf_str);
sink->gconf_str = NULL;
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
}
static void
gst_gconf_video_sink_finalize (GstGConfVideoSink * sink)
{
g_free (sink->gconf_str);
GST_CALL_PARENT (G_OBJECT_CLASS, finalize, ((GObject *) (sink)));
}
static gboolean
do_toggle_element (GstGConfVideoSink * sink)
{
GstPad *targetpad;
gchar *new_gconf_str;
GstState cur, next;
new_gconf_str = gst_gconf_get_string (GST_GCONF_VIDEOSINK_KEY);
if (new_gconf_str != NULL && sink->gconf_str != NULL &&
(strlen (new_gconf_str) == 0 ||
strcmp (sink->gconf_str, new_gconf_str) == 0)) {
g_free (new_gconf_str);
GST_DEBUG_OBJECT (sink, "GConf key was updated, but it didn't change");
return TRUE;
}
/* Sometime, it would be lovely to allow sink changes even when
* already running, but this involves sending an appropriate new-segment
* and possibly prerolling etc */
GST_OBJECT_LOCK (sink);
cur = GST_STATE (sink);
next = GST_STATE_PENDING (sink);
GST_OBJECT_UNLOCK (sink);
if (cur > GST_STATE_READY || next == GST_STATE_PAUSED) {
GST_DEBUG_OBJECT (sink,
"Auto-sink is already running. Ignoring GConf change");
g_free (new_gconf_str);
return TRUE;
}
GST_DEBUG_OBJECT (sink, "GConf key changed: '%s' to '%s'",
GST_STR_NULL (sink->gconf_str), GST_STR_NULL (new_gconf_str));
g_free (sink->gconf_str);
sink->gconf_str = new_gconf_str;
/* kill old element */
if (sink->kid) {
GST_DEBUG_OBJECT (sink, "Removing old kid");
gst_element_set_state (sink->kid, GST_STATE_NULL);
gst_bin_remove (GST_BIN (sink), sink->kid);
sink->kid = NULL;
}
GST_DEBUG_OBJECT (sink, "Creating new kid");
if (!(sink->kid = gst_gconf_get_default_video_sink ())) {
GST_ELEMENT_ERROR (sink, LIBRARY, SETTINGS, (NULL),
("Failed to render video sink from GConf"));
return FALSE;
}
gst_element_set_state (sink->kid, GST_STATE (sink));
gst_bin_add (GST_BIN (sink), sink->kid);
/* re-attach ghostpad */
GST_DEBUG_OBJECT (sink, "Creating new ghostpad");
targetpad = gst_element_get_static_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 gconf video sink");
return TRUE;
}
static void
cb_toggle_element (GConfClient * client,
guint connection_id, GConfEntry * entry, gpointer data)
{
do_toggle_element (GST_GCONF_VIDEO_SINK (data));
}
static GstStateChangeReturn
gst_gconf_video_sink_change_state (GstElement * element,
GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstGConfVideoSink *sink = GST_GCONF_VIDEO_SINK (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!do_toggle_element (sink))
return GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
ret = GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS, change_state,
(element, transition), GST_STATE_CHANGE_SUCCESS);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
if (!gst_gconf_video_sink_reset (sink))
ret = GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
return ret;
}
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