Made a theorical libgstplay which refs/unrefs elements before putting them in AsyncQueue.

Original commit message from CVS:
Made a theorical libgstplay which refs/unrefs elements before putting them in AsyncQueue.
Added a "pipeline_error" signal which will later allow the player and apps to detect that pipeline was unable to play and why...
This version is NOT STABLE AT ALL. it will need fixes in core but i commit it as is so that we fix those problems

2 files changed, 42 insertions, 5 deletions

diff --git a/gst-libs/gst/play/play.old.c b/gst-libs/gst/play/play.old.c
index 1becf292..3be09982 100644
--- a/gst-libs/gst/play/play.old.c
+++ b/gst-libs/gst/play/play.old.c
@@ -34,6 +34,7 @@ enum {
 	HAVE_VIS_XID,
 	HAVE_VIDEO_SIZE,
 	LAST_SIGNAL,
+	PIPELINE_ERROR,
 };
 
 /* this struct is used to decouple signals coming out of threaded pipelines */
@@ -59,6 +60,10 @@ struct _GstPlaySignal
 			GstElement* element;
 			GParamSpec* param;
 		} info;
+		struct {
+			GstElement* element;
+			gchar* error;
+		} error;
 	} signal_data;
 };
 
@@ -338,6 +343,14 @@ gst_play_idle_signal (GstPlay *play)
 	case INFORMATION:
 		g_signal_emit (G_OBJECT (play), gst_play_signals[INFORMATION], 0, 
 		               signal->signal_data.info.element, signal->signal_data.info.param);
+		gst_object_unref (GST_OBJECT(signal->signal_data.info.element));
+		break;
+	case PIPELINE_ERROR:
+		if (gst_element_get_state(play->pipeline) == GST_STATE_PLAYING)
+			gst_element_set_state(play->pipeline, GST_STATE_READY);
+		g_signal_emit (G_OBJECT (play), gst_play_signals[PIPELINE_ERROR], 0, 
+		               signal->signal_data.error.element, signal->signal_data.error.error);
+		gst_object_unref (GST_OBJECT(signal->signal_data.error.element));
 		break;
 	default:
 		break;
@@ -428,14 +441,23 @@ callback_bin_post_iterate (	GstBin *bin,
 }
 
 static void
-callback_pipeline_error (	GObject *object,
-							GstObject *orig,
+callback_pipeline_error (	GstElement *object,
+							GstElement *orig,
 							gchar *error,
 							GstPlay* play)
 { 
-	g_print ("Pipeline error: %s\n", error);
-	if (gst_element_get_state(play->pipeline) == GST_STATE_PLAYING)
-		gst_element_set_state(play->pipeline, GST_STATE_READY);
+	GstPlaySignal *signal;
+	
+	signal = g_new0(GstPlaySignal, 1);
+	signal->signal_id = PIPELINE_ERROR;
+	signal->signal_data.error.element = orig;
+	signal->signal_data.error.error = error;
+	
+	gst_object_ref (GST_OBJECT(orig));
+	
+	g_async_queue_push(play->signal_queue, signal);
+	
+	play->idle_add_func ((GSourceFunc) gst_play_idle_signal, play);
 } 
 
 static void
@@ -450,6 +472,8 @@ callback_pipeline_deep_notify (	GstElement *element,
 	signal->signal_id = INFORMATION;
 	signal->signal_data.info.element = orig;
 	signal->signal_data.info.param = param;
+
+	gst_object_ref (GST_OBJECT(orig));
 	
 	g_async_queue_push(play->signal_queue, signal);
 	
@@ -577,6 +601,16 @@ gst_play_class_init (GstPlayClass *klass)
 			      G_TYPE_NONE, 2, 
 			      G_TYPE_OBJECT, G_TYPE_PARAM);
 	
+	gst_play_signals [PIPELINE_ERROR] = 
+		g_signal_new ("pipeline_error", 
+			      G_TYPE_FROM_CLASS (klass), 
+			      G_SIGNAL_RUN_FIRST,
+			      G_STRUCT_OFFSET (GstPlayClass, pipeline_error), 
+			      NULL, NULL,
+			      gst_marshal_VOID__OBJECT_PARAM, 
+			      G_TYPE_NONE, 2, 
+			      G_TYPE_OBJECT, G_TYPE_PARAM);
+	
 	gst_play_signals [STATE_CHANGE] = 
 		g_signal_new ("state_change", 
 			      G_TYPE_FROM_CLASS (klass), 
diff --git a/gst-libs/gst/play/play.old.h b/gst-libs/gst/play/play.old.h
index 90f9a5ce..6851b11e 100644
--- a/gst-libs/gst/play/play.old.h
+++ b/gst-libs/gst/play/play.old.h
@@ -142,6 +142,9 @@ struct _GstPlayClass
 	void (*information)		(	GstPlay* play,
 								GstElement* element,
 								GParamSpec *param);
+	void (*pipeline_error)	(	GstPlay* play,
+								GstElement* element,
+								gchar *error);
 	void (*state_changed)	(	GstPlay* play,
 								GstElementState old_state,
 								GstElementState new_state);