tests/examples/gl/gtk/fxtest/fxtest.c - mtk-gst-plugins-bad-debian - Git at Google

 /*
  * GStreamer
  * Copyright (C) 2008-2009 Filippo Argiolas <filippo.argiolas@gmail.com>
  *
  * 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., 51 Franklin St, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

 #define GLIB_DISABLE_DEPRECATION_WARNINGS

 #include <gst/gst.h>
 #include <gtk/gtk.h>
 #include <gdk/gdk.h>
 #include <gdk-pixbuf/gdk-pixbuf.h>

 #include "../gstgtk.h"

 #include <gst/video/videooverlay.h>

 #ifdef HAVE_X11
 #include <X11/Xlib.h>
 #endif


 static GstBusSyncReply
 create_window (GstBus * bus, GstMessage * message, GtkWidget * widget)
 {
   if (gst_gtk_handle_need_context (bus, message, NULL))
     return GST_BUS_DROP;

   /* ignore anything but 'prepare-window-handle' element messages */
   if (GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT)
     return GST_BUS_PASS;

   if (!gst_is_video_overlay_prepare_window_handle_message (message))
     return GST_BUS_PASS;

   g_print ("setting window handle\n");

   /* do not call gdk_window_ensure_native for the first time here because
    * we are in a different thread than the main thread
    * (and the main thread the one) */
   gst_video_overlay_set_gtk_window (GST_VIDEO_OVERLAY (GST_MESSAGE_SRC
           (message)), widget);

   gst_message_unref (message);

   return GST_BUS_DROP;
 }


 static void
 end_stream_cb (GstBus * bus, GstMessage * message, GstElement * pipeline)
 {
   switch (GST_MESSAGE_TYPE (message)) {
     case GST_MESSAGE_EOS:
       g_print ("End of stream\n");

       gst_element_set_state (pipeline, GST_STATE_NULL);
       gst_object_unref (pipeline);
       gtk_main_quit ();
       break;
     case GST_MESSAGE_ERROR:
     {
       gchar *debug = NULL;
       GError *err = NULL;

       gst_message_parse_error (message, &err, &debug);

       g_print ("Error: %s\n", err->message);
       g_clear_error (&err);

       if (debug) {
         g_print ("Debug details: %s\n", debug);
         g_free (debug);
       }

       gst_element_set_state (pipeline, GST_STATE_NULL);
       gst_object_unref (pipeline);
       gtk_main_quit ();
       break;
     }
     default:
       break;
   }
 }

 static gboolean
 resize_cb (GtkWidget * widget, GdkEvent * event, gpointer data)
 {
   GtkAllocation allocation;
   GstVideoOverlay *overlay =
       GST_VIDEO_OVERLAY (gst_bin_get_by_interface (GST_BIN (data),
           GST_TYPE_VIDEO_OVERLAY));

   gtk_widget_get_allocation (widget, &allocation);
   gst_video_overlay_set_render_rectangle (overlay, allocation.x, allocation.y,
       allocation.width, allocation.height);
   gst_object_unref (overlay);

   return G_SOURCE_CONTINUE;
 }

 static gboolean
 expose_cb (GtkWidget * widget, gpointer unused, gpointer data)
 {
   GstVideoOverlay *overlay =
       GST_VIDEO_OVERLAY (gst_bin_get_by_interface (GST_BIN (data),
           GST_TYPE_VIDEO_OVERLAY));

   gst_video_overlay_expose (overlay);
   gst_object_unref (overlay);

   return FALSE;
 }

 static void
 destroy_cb (GtkWidget * widget, GdkEvent * event, GstElement * pipeline)
 {
   g_message ("destroy callback");

   gst_element_set_state (pipeline, GST_STATE_NULL);
   gst_object_unref (pipeline);

   gtk_main_quit ();
 }

 static gboolean
 apply_fx (GtkWidget * widget, gpointer data)
 {
   gchar *fx;
   GEnumClass *p_class;

 /* heeeellppppp!! */
   p_class =
       G_PARAM_SPEC_ENUM (g_object_class_find_property (G_OBJECT_GET_CLASS
           (G_OBJECT (data)), "effect")
       )->enum_class;

   fx = gtk_combo_box_text_get_active_text (GTK_COMBO_BOX_TEXT (widget));
   g_print ("setting: %s - %s\n", fx, g_enum_get_value_by_nick (p_class,
           fx)->value_name);
   g_object_set (G_OBJECT (data), "effect", g_enum_get_value_by_nick (p_class,
           fx)->value, NULL);
   return FALSE;
 }

 static gboolean
 play_cb (GtkWidget * widget, gpointer data)
 {
   g_message ("playing");
   gst_element_set_state (GST_ELEMENT (data), GST_STATE_PLAYING);
   return FALSE;
 }

 static gboolean
 null_cb (GtkWidget * widget, gpointer data)
 {
   g_message ("nulling");
   gst_element_set_state (GST_ELEMENT (data), GST_STATE_NULL);
   return FALSE;
 }

 static gboolean
 ready_cb (GtkWidget * widget, gpointer data)
 {
   g_message ("readying");
   gst_element_set_state (GST_ELEMENT (data), GST_STATE_READY);
   return FALSE;
 }

 static gboolean
 pause_cb (GtkWidget * widget, gpointer data)
 {
   g_message ("pausing");
   gst_element_set_state (GST_ELEMENT (data), GST_STATE_PAUSED);
   return FALSE;
 }

 gint
 main (gint argc, gchar * argv[])
 {
   GstStateChangeReturn ret;
   GstElement *pipeline;
   GstElement *upload, *filter, *sink;
   GstElement *sourcebin;
   GstBus *bus;
   GError *error = NULL;

   GtkWidget *window;
   GtkWidget *screen;
   GtkWidget *vbox, *combo;
   GtkWidget *hbox;
   GtkWidget *play, *pause, *null, *ready;

   gchar **source_desc_array = NULL;
   gchar *source_desc = NULL;

   GOptionContext *context;
   GOptionEntry options[] = {
     {"source-bin", 's', 0, G_OPTION_ARG_STRING_ARRAY, &source_desc_array,
         "Use a custom source bin description (gst-launch style)", NULL}
     ,
     {NULL}
   };

 #ifdef HAVE_X11
   XInitThreads ();
 #endif

   context = g_option_context_new (NULL);
   g_option_context_add_main_entries (context, options, NULL);
   g_option_context_add_group (context, gst_init_get_option_group ());
   g_option_context_add_group (context, gtk_get_option_group (TRUE));
   if (!g_option_context_parse (context, &argc, &argv, &error)) {
     g_print ("Inizialization error: %s\n", GST_STR_NULL (error->message));
     g_option_context_free (context);
     g_clear_error (&error);
     return -1;
   }
   g_option_context_free (context);

   if (source_desc_array != NULL) {
     source_desc = g_strjoinv (" ", source_desc_array);
     g_strfreev (source_desc_array);
   }
   if (source_desc == NULL) {
     source_desc =
         g_strdup
         ("videotestsrc ! video/x-raw, width=352, height=288 ! identity");
   }

   sourcebin =
       gst_parse_bin_from_description (g_strdup (source_desc), TRUE, &error);
   g_free (source_desc);
   if (error) {
     g_print ("Error while parsing source bin description: %s\n",
         GST_STR_NULL (error->message));
     return -1;
   }

   g_set_application_name ("gst-gl-effects test app");

   window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
   gtk_container_set_border_width (GTK_CONTAINER (window), 3);

   pipeline = gst_pipeline_new ("pipeline");

   upload = gst_element_factory_make ("glupload", NULL);
   filter = gst_element_factory_make ("gleffects", "flt");
   sink = gst_element_factory_make ("glimagesink", "glsink");

   gst_bin_add_many (GST_BIN (pipeline), sourcebin, upload, filter, sink, NULL);

   if (!gst_element_link_many (sourcebin, upload, filter, sink, NULL)) {
     g_print ("Failed to link one or more elements!\n");
     return -1;
   }

   g_signal_connect (G_OBJECT (window), "delete-event",
       G_CALLBACK (destroy_cb), pipeline);
   g_signal_connect (G_OBJECT (window), "destroy-event",
       G_CALLBACK (destroy_cb), pipeline);

   screen = gtk_drawing_area_new ();
   bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
   gst_bus_add_signal_watch (bus);
   g_signal_connect (bus, "message::error", G_CALLBACK (end_stream_cb),
       pipeline);
   g_signal_connect (bus, "message::warning", G_CALLBACK (end_stream_cb),
       pipeline);
   g_signal_connect (bus, "message::eos", G_CALLBACK (end_stream_cb), pipeline);

   gst_bus_set_sync_handler (bus, (GstBusSyncHandler) create_window, screen,
       NULL);
   gst_object_unref (bus);

   gtk_widget_set_size_request (screen, 640, 480);       // 500 x 376

   vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);

   gtk_box_pack_start (GTK_BOX (vbox), screen, TRUE, TRUE, 0);

   combo = gtk_combo_box_text_new ();

   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "identity");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "mirror");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "squeeze");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "stretch");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "fisheye");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "twirl");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "bulge");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "tunnel");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "square");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "heat");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "xpro");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "lumaxpro");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "sepia");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "xray");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "sin");
   gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "glow");

   g_signal_connect (G_OBJECT (combo), "changed", G_CALLBACK (apply_fx), filter);

   gtk_box_pack_start (GTK_BOX (vbox), combo, FALSE, FALSE, 0);

   hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);

   play = gtk_button_new_with_label ("PLAY");

   g_signal_connect (G_OBJECT (play), "clicked", G_CALLBACK (play_cb), pipeline);

   pause = gtk_button_new_with_label ("PAUSE");

   g_signal_connect (G_OBJECT (pause), "clicked",
       G_CALLBACK (pause_cb), pipeline);

   null = gtk_button_new_with_label ("NULL");

   g_signal_connect (G_OBJECT (null), "clicked", G_CALLBACK (null_cb), pipeline);

   ready = gtk_button_new_with_label ("READY");

   g_signal_connect (G_OBJECT (ready), "clicked",
       G_CALLBACK (ready_cb), pipeline);

   gtk_box_pack_start (GTK_BOX (hbox), null, TRUE, TRUE, 0);
   gtk_box_pack_start (GTK_BOX (hbox), ready, TRUE, TRUE, 0);
   gtk_box_pack_start (GTK_BOX (hbox), play, TRUE, TRUE, 0);
   gtk_box_pack_start (GTK_BOX (hbox), pause, TRUE, TRUE, 0);

   gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);

   gtk_container_add (GTK_CONTAINER (window), vbox);

   g_signal_connect (screen, "draw", G_CALLBACK (expose_cb), pipeline);
   g_signal_connect (screen, "configure-event", G_CALLBACK (resize_cb),
       pipeline);
   gtk_widget_realize (screen);

   ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
   if (ret == GST_STATE_CHANGE_FAILURE) {
     g_print ("Failed to start up pipeline!\n");
     return -1;
   }

   gtk_widget_show_all (GTK_WIDGET (window));

   gtk_main ();

   return 0;
 }
	/*
	* GStreamer
	* Copyright (C) 2008-2009 Filippo Argiolas <filippo.argiolas@gmail.com>
	*
	* 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., 51 Franklin St, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*/
	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif

	#define GLIB_DISABLE_DEPRECATION_WARNINGS

	#include <gst/gst.h>
	#include <gtk/gtk.h>
	#include <gdk/gdk.h>
	#include <gdk-pixbuf/gdk-pixbuf.h>

	#include "../gstgtk.h"

	#include <gst/video/videooverlay.h>

	#ifdef HAVE_X11
	#include <X11/Xlib.h>
	#endif


	static GstBusSyncReply
	create_window (GstBus * bus, GstMessage * message, GtkWidget * widget)
	{
	if (gst_gtk_handle_need_context (bus, message, NULL))
	return GST_BUS_DROP;

	/* ignore anything but 'prepare-window-handle' element messages */
	if (GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT)
	return GST_BUS_PASS;

	if (!gst_is_video_overlay_prepare_window_handle_message (message))
	return GST_BUS_PASS;

	g_print ("setting window handle\n");

	/* do not call gdk_window_ensure_native for the first time here because
	* we are in a different thread than the main thread
	* (and the main thread the one) */
	gst_video_overlay_set_gtk_window (GST_VIDEO_OVERLAY (GST_MESSAGE_SRC
	(message)), widget);

	gst_message_unref (message);

	return GST_BUS_DROP;
	}


	static void
	end_stream_cb (GstBus * bus, GstMessage * message, GstElement * pipeline)
	{
	switch (GST_MESSAGE_TYPE (message)) {
	case GST_MESSAGE_EOS:
	g_print ("End of stream\n");

	gst_element_set_state (pipeline, GST_STATE_NULL);
	gst_object_unref (pipeline);
	gtk_main_quit ();
	break;
	case GST_MESSAGE_ERROR:
	{
	gchar *debug = NULL;
	GError *err = NULL;

	gst_message_parse_error (message, &err, &debug);

	g_print ("Error: %s\n", err->message);
	g_clear_error (&err);

	if (debug) {
	g_print ("Debug details: %s\n", debug);
	g_free (debug);
	}

	gst_element_set_state (pipeline, GST_STATE_NULL);
	gst_object_unref (pipeline);
	gtk_main_quit ();
	break;
	}
	default:
	break;
	}
	}

	static gboolean
	resize_cb (GtkWidget * widget, GdkEvent * event, gpointer data)
	{
	GtkAllocation allocation;
	GstVideoOverlay *overlay =
	GST_VIDEO_OVERLAY (gst_bin_get_by_interface (GST_BIN (data),
	GST_TYPE_VIDEO_OVERLAY));

	gtk_widget_get_allocation (widget, &allocation);
	gst_video_overlay_set_render_rectangle (overlay, allocation.x, allocation.y,
	allocation.width, allocation.height);
	gst_object_unref (overlay);

	return G_SOURCE_CONTINUE;
	}

	static gboolean
	expose_cb (GtkWidget * widget, gpointer unused, gpointer data)
	{
	GstVideoOverlay *overlay =
	GST_VIDEO_OVERLAY (gst_bin_get_by_interface (GST_BIN (data),
	GST_TYPE_VIDEO_OVERLAY));

	gst_video_overlay_expose (overlay);
	gst_object_unref (overlay);

	return FALSE;
	}

	static void
	destroy_cb (GtkWidget * widget, GdkEvent * event, GstElement * pipeline)
	{
	g_message ("destroy callback");

	gst_element_set_state (pipeline, GST_STATE_NULL);
	gst_object_unref (pipeline);

	gtk_main_quit ();
	}

	static gboolean
	apply_fx (GtkWidget * widget, gpointer data)
	{
	gchar *fx;
	GEnumClass *p_class;

	/* heeeellppppp!! */
	p_class =
	G_PARAM_SPEC_ENUM (g_object_class_find_property (G_OBJECT_GET_CLASS
	(G_OBJECT (data)), "effect")
	)->enum_class;

	fx = gtk_combo_box_text_get_active_text (GTK_COMBO_BOX_TEXT (widget));
	g_print ("setting: %s - %s\n", fx, g_enum_get_value_by_nick (p_class,
	fx)->value_name);
	g_object_set (G_OBJECT (data), "effect", g_enum_get_value_by_nick (p_class,
	fx)->value, NULL);
	return FALSE;
	}

	static gboolean
	play_cb (GtkWidget * widget, gpointer data)
	{
	g_message ("playing");
	gst_element_set_state (GST_ELEMENT (data), GST_STATE_PLAYING);
	return FALSE;
	}

	static gboolean
	null_cb (GtkWidget * widget, gpointer data)
	{
	g_message ("nulling");
	gst_element_set_state (GST_ELEMENT (data), GST_STATE_NULL);
	return FALSE;
	}

	static gboolean
	ready_cb (GtkWidget * widget, gpointer data)
	{
	g_message ("readying");
	gst_element_set_state (GST_ELEMENT (data), GST_STATE_READY);
	return FALSE;
	}

	static gboolean
	pause_cb (GtkWidget * widget, gpointer data)
	{
	g_message ("pausing");
	gst_element_set_state (GST_ELEMENT (data), GST_STATE_PAUSED);
	return FALSE;
	}

	gint
	main (gint argc, gchar * argv[])
	{
	GstStateChangeReturn ret;
	GstElement *pipeline;
	GstElement upload, filter, *sink;
	GstElement *sourcebin;
	GstBus *bus;
	GError *error = NULL;

	GtkWidget *window;
	GtkWidget *screen;
	GtkWidget vbox, combo;
	GtkWidget *hbox;
	GtkWidget play, pause, null, ready;

	gchar **source_desc_array = NULL;
	gchar *source_desc = NULL;

	GOptionContext *context;
	GOptionEntry options[] = {
	{"source-bin", 's', 0, G_OPTION_ARG_STRING_ARRAY, &source_desc_array,
	"Use a custom source bin description (gst-launch style)", NULL}
	,
	{NULL}
	};

	#ifdef HAVE_X11
	XInitThreads ();
	#endif

	context = g_option_context_new (NULL);
	g_option_context_add_main_entries (context, options, NULL);
	g_option_context_add_group (context, gst_init_get_option_group ());
	g_option_context_add_group (context, gtk_get_option_group (TRUE));
	if (!g_option_context_parse (context, &argc, &argv, &error)) {
	g_print ("Inizialization error: %s\n", GST_STR_NULL (error->message));
	g_option_context_free (context);
	g_clear_error (&error);
	return -1;
	}
	g_option_context_free (context);

	if (source_desc_array != NULL) {
	source_desc = g_strjoinv (" ", source_desc_array);
	g_strfreev (source_desc_array);
	}
	if (source_desc == NULL) {
	source_desc =
	g_strdup
	("videotestsrc ! video/x-raw, width=352, height=288 ! identity");
	}

	sourcebin =
	gst_parse_bin_from_description (g_strdup (source_desc), TRUE, &error);
	g_free (source_desc);
	if (error) {
	g_print ("Error while parsing source bin description: %s\n",
	GST_STR_NULL (error->message));
	return -1;
	}

	g_set_application_name ("gst-gl-effects test app");

	window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
	gtk_container_set_border_width (GTK_CONTAINER (window), 3);

	pipeline = gst_pipeline_new ("pipeline");

	upload = gst_element_factory_make ("glupload", NULL);
	filter = gst_element_factory_make ("gleffects", "flt");
	sink = gst_element_factory_make ("glimagesink", "glsink");

	gst_bin_add_many (GST_BIN (pipeline), sourcebin, upload, filter, sink, NULL);

	if (!gst_element_link_many (sourcebin, upload, filter, sink, NULL)) {
	g_print ("Failed to link one or more elements!\n");
	return -1;
	}

	g_signal_connect (G_OBJECT (window), "delete-event",
	G_CALLBACK (destroy_cb), pipeline);
	g_signal_connect (G_OBJECT (window), "destroy-event",
	G_CALLBACK (destroy_cb), pipeline);

	screen = gtk_drawing_area_new ();
	bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
	gst_bus_add_signal_watch (bus);
	g_signal_connect (bus, "message::error", G_CALLBACK (end_stream_cb),
	pipeline);
	g_signal_connect (bus, "message::warning", G_CALLBACK (end_stream_cb),
	pipeline);
	g_signal_connect (bus, "message::eos", G_CALLBACK (end_stream_cb), pipeline);

	gst_bus_set_sync_handler (bus, (GstBusSyncHandler) create_window, screen,
	NULL);
	gst_object_unref (bus);

	gtk_widget_set_size_request (screen, 640, 480); // 500 x 376

	vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);

	gtk_box_pack_start (GTK_BOX (vbox), screen, TRUE, TRUE, 0);

	combo = gtk_combo_box_text_new ();

	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "identity");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "mirror");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "squeeze");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "stretch");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "fisheye");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "twirl");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "bulge");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "tunnel");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "square");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "heat");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "xpro");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "lumaxpro");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "sepia");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "xray");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "sin");
	gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "glow");

	g_signal_connect (G_OBJECT (combo), "changed", G_CALLBACK (apply_fx), filter);

	gtk_box_pack_start (GTK_BOX (vbox), combo, FALSE, FALSE, 0);

	hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);

	play = gtk_button_new_with_label ("PLAY");

	g_signal_connect (G_OBJECT (play), "clicked", G_CALLBACK (play_cb), pipeline);

	pause = gtk_button_new_with_label ("PAUSE");

	g_signal_connect (G_OBJECT (pause), "clicked",
	G_CALLBACK (pause_cb), pipeline);

	null = gtk_button_new_with_label ("NULL");

	g_signal_connect (G_OBJECT (null), "clicked", G_CALLBACK (null_cb), pipeline);

	ready = gtk_button_new_with_label ("READY");

	g_signal_connect (G_OBJECT (ready), "clicked",
	G_CALLBACK (ready_cb), pipeline);

	gtk_box_pack_start (GTK_BOX (hbox), null, TRUE, TRUE, 0);
	gtk_box_pack_start (GTK_BOX (hbox), ready, TRUE, TRUE, 0);
	gtk_box_pack_start (GTK_BOX (hbox), play, TRUE, TRUE, 0);
	gtk_box_pack_start (GTK_BOX (hbox), pause, TRUE, TRUE, 0);

	gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);

	gtk_container_add (GTK_CONTAINER (window), vbox);

	g_signal_connect (screen, "draw", G_CALLBACK (expose_cb), pipeline);
	g_signal_connect (screen, "configure-event", G_CALLBACK (resize_cb),
	pipeline);
	gtk_widget_realize (screen);

	ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
	if (ret == GST_STATE_CHANGE_FAILURE) {
	g_print ("Failed to start up pipeline!\n");
	return -1;
	}

	gtk_widget_show_all (GTK_WIDGET (window));

	gtk_main ();

	return 0;
	}