diff --git a/ext/gtk/gstgtksink.c b/ext/gtk/gstgtksink.c index 215ea937bb..9c442e39a2 100644 --- a/ext/gtk/gstgtksink.c +++ b/ext/gtk/gstgtksink.c @@ -159,11 +159,19 @@ gst_gtk_sink_finalize (GObject * object) { GstGtkSink *gtk_sink = GST_GTK_SINK (object);; - g_object_unref (gtk_sink->widget); + g_clear_object (>k_sink->widget); G_OBJECT_CLASS (parent_class)->finalize (object); } +static void +widget_destroy_cb (GtkWidget * widget, GstGtkSink * gtk_sink) +{ + GST_OBJECT_LOCK (gtk_sink); + g_clear_object (>k_sink->widget); + GST_OBJECT_UNLOCK (gtk_sink); +} + static GtkGstWidget * gst_gtk_sink_get_widget (GstGtkSink * gtk_sink) { @@ -191,6 +199,8 @@ gst_gtk_sink_get_widget (GstGtkSink * gtk_sink) /* Take the floating ref, other wise the destruction of the container will * make this widget disapear possibly before we are done. */ gst_object_ref_sink (gtk_sink->widget); + g_signal_connect (gtk_sink->widget, "destroy", + G_CALLBACK (widget_destroy_cb), gtk_sink); return gtk_sink->widget; } @@ -268,6 +278,7 @@ gst_gtk_sink_change_state (GstElement * element, GstStateChange transition) { GstGtkSink *gtk_sink = GST_GTK_SINK (element); GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; + GtkWidget *toplevel; GST_DEBUG ("changing state: %s => %s", gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)), @@ -277,6 +288,22 @@ gst_gtk_sink_change_state (GstElement * element, GstStateChange transition) case GST_STATE_CHANGE_NULL_TO_READY: if (gst_gtk_sink_get_widget (gtk_sink) == NULL) return GST_STATE_CHANGE_FAILURE; + + /* After this point, gtk_sink->widget will always be set */ + + toplevel = gtk_widget_get_toplevel (GTK_WIDGET (gtk_sink->widget)); + if (!gtk_widget_is_toplevel (toplevel)) { + GtkWidget *window; + + /* User did not add widget its own UI, let's popup a new GtkWindow to + * make gst-launch-1.0 work. */ + window = gtk_window_new (GTK_WINDOW_TOPLEVEL); + gtk_window_set_default_size (GTK_WINDOW (window), 640, 480); + gtk_window_set_title (GTK_WINDOW (window), "Gtk+ Cairo renderer"); + gtk_container_add (GTK_CONTAINER (window), toplevel); + gtk_widget_show_all (window); + } + break; case GST_STATE_CHANGE_READY_TO_PAUSED: break;