Error handling is inside and works :)

Original commit message from CVS:
Error handling is inside and works :)
Mutexes have been removed. That should fix UI responsiveness problems on query_length. Please heavily test to check if they were really needed.
Some fixes in GClosures

gst-libs/gst/play/play.old.c

@@ -63,7 +63,7 @@ struct _GstPlaySignal
 		} info;
 		struct {
 			GstElement* element;
-			gchar* error;
+			char* error;
 		} error;
 	} signal_data;
 };
@@ -219,22 +219,15 @@ gst_play_get_length_callback (GstPlay *play)
 	GstFormat format = GST_FORMAT_TIME;
 	gboolean query_worked = FALSE;
 
-	g_print("trying to get length\n");
 	if (	(play->audio_sink_element != NULL) &&
 			(GST_IS_ELEMENT (play->audio_sink_element)) ) {
-		g_mutex_lock(play->audio_bin_mutex);
 		query_worked = gst_element_query (play->audio_sink_element, GST_QUERY_TOTAL, &format, &value);
-		g_mutex_unlock(play->audio_bin_mutex);
-		g_message ("getting length from audio sink");
 	}
 	else if (	(play->video_sink_element != NULL) &&
 				(GST_IS_ELEMENT (play->video_sink_element)) ) {
-		g_mutex_lock(play->video_bin_mutex);
 		query_worked = gst_element_query (play->video_sink_element, GST_QUERY_TOTAL, &format, &value);
-		g_mutex_unlock(play->video_bin_mutex);
 	}
 	if (query_worked){
-		g_print("got length %" G_GINT64_FORMAT "\n", value);
 		g_signal_emit (G_OBJECT (play), gst_play_signals [STREAM_LENGTH], 0, value);
 		play->length_nanos = value;
 		return FALSE;
@@ -352,6 +345,8 @@ gst_play_idle_signal (GstPlay *play)
 			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);
+		if (signal->signal_data.error.error)
+			g_free (signal->signal_data.error.error);
 		gst_object_unref (GST_OBJECT(signal->signal_data.error.element));
 		break;
 	default:
@@ -428,24 +423,10 @@ callback_video_have_size (	GstElement *element,
 	play->idle_add_func ((GSourceFunc) gst_play_idle_signal, play);
 }
 
-static void 
-callback_bin_pre_iterate (	GstBin *bin,
-							GMutex *mutex)
-{
-	g_mutex_lock(mutex);
-}
-
-static void 
-callback_bin_post_iterate (	GstBin *bin,
-							GMutex *mutex)
-{
-	g_mutex_unlock(mutex);
-}
-
 static void
 callback_pipeline_error (	GstElement *object,
 							GstElement *orig,
-							gchar *error,
+							char *error,
 							GstPlay* play)
 { 
 	GstPlaySignal *signal;
@@ -453,7 +434,7 @@ callback_pipeline_error (	GstElement *object,
 	signal = g_new0(GstPlaySignal, 1);
 	signal->signal_id = PIPELINE_ERROR;
 	signal->signal_data.error.element = orig;
-	signal->signal_data.error.error = error;
+	signal->signal_data.error.error = g_strdup(error);
 	
 	gst_object_ref (GST_OBJECT(orig));
 	
@@ -549,8 +530,6 @@ gst_play_dispose (GObject *object)
 	while (g_source_remove_by_user_data (play));
 	
 	G_OBJECT_CLASS (parent_class)->dispose (object);
-	g_mutex_free(play->audio_bin_mutex);
-	g_mutex_free(play->video_bin_mutex);
 }
 
 static void
@@ -611,7 +590,7 @@ gst_play_class_init (GstPlayClass *klass)
 			      G_SIGNAL_RUN_FIRST,
 			      G_STRUCT_OFFSET (GstPlayClass, pipeline_error), 
 			      NULL, NULL,
-			      gst_marshal_VOID__OBJECT_PARAM, 
+			      gst_marshal_VOID__OBJECT_STRING, 
 			      G_TYPE_NONE, 2, 
 			      G_TYPE_OBJECT, G_TYPE_STRING);
 	
@@ -701,8 +680,6 @@ gst_play_init (GstPlay *play)
 	play->video_sink_element	= NULL;
 	play->volume				= NULL;
 	play->other_elements		= g_hash_table_new(g_str_hash, g_str_equal);
-	play->audio_bin_mutex		= g_mutex_new();
-	play->video_bin_mutex		= g_mutex_new();
 	
 	gst_play_set_idle_timeout_funcs(	play,
 										gst_play_default_timeout_add,

gst-libs/gst/play/play.old.h

@@ -117,9 +117,6 @@ struct _GstPlay
 
 	GstClock *clock;
 
-	GMutex *audio_bin_mutex;
-	GMutex *video_bin_mutex;
-
 	gboolean need_stream_length;
 	gboolean need_seek;
  	gint time_seconds;
@@ -139,25 +136,25 @@ struct _GstPlayClass
 	GObjectClass parent_class;
 	
 	/* signals */
-	void (*information)		(	GstPlay* play,
+	void (*information)		(GstPlay* play,
 								GstObject* element,
 								GParamSpec *param);
-	void (*pipeline_error)	(	GstPlay* play,
+	void (*pipeline_error)	(GstPlay* play,
 								GstElement* element,
-								gchar *error);
+								char *error);
-	void (*state_changed)	(	GstPlay* play,
+	void (*state_changed)	(GstPlay* play,
 								GstElementState old_state,
 								GstElementState new_state);
-	void (*stream_end)		(	GstPlay* play);
+	void (*stream_end)		(GstPlay* play);
-	void (*time_tick)		(	GstPlay* play,
+	void (*time_tick)		(GstPlay* play,
 								gint64 time_nanos);
-	void (*stream_length)	(	GstPlay* play,
+	void (*stream_length)	(GstPlay* play,
 								gint64 length_nanos);
-	void (*have_xid)	  	(	GstPlay* play,
+	void (*have_xid)	  	(GstPlay* play,
 								gint xid);
-	void (*have_vis_xid)	 (	GstPlay* play,
+	void (*have_vis_xid)	 (GstPlay* play,
 								gint xid);
-	void (*have_video_size)	(	GstPlay* play,
+	void (*have_video_size)	(GstPlay* play,
 								gint width,
 								gint height);
 };

gst-libs/gst/play/playpipelines.c

@@ -98,16 +98,6 @@ gst_play_audio_setup (	GstPlay *play,
 	
 	gst_element_link (play->volume, play->audio_sink);
 
-	gst_bin_set_pre_iterate_function(
-			GST_BIN (play->pipeline), 
-			(GstBinPrePostIterateFunction) callback_bin_pre_iterate,
-			play->audio_bin_mutex);
-			
-	gst_bin_set_post_iterate_function(
-			GST_BIN (play->pipeline), 
-			(GstBinPrePostIterateFunction) callback_bin_post_iterate,
-			play->audio_bin_mutex);
-
 	return TRUE;
 }
 
@@ -167,16 +157,6 @@ gst_play_audiot_setup (	GstPlay *play,
 	
 	gst_element_link (play->volume, play->audio_sink);
 	
-	gst_bin_set_pre_iterate_function(
-			GST_BIN (play->pipeline), 
-			(GstBinPrePostIterateFunction) callback_bin_pre_iterate,
-			play->audio_bin_mutex);
-			
-	gst_bin_set_post_iterate_function(
-			GST_BIN (play->pipeline), 
-			(GstBinPrePostIterateFunction) callback_bin_post_iterate,
-			play->audio_bin_mutex);
-
 	return TRUE;
 }
 
@@ -323,16 +303,6 @@ gst_play_audioht_setup (	GstPlay *play,
 
 	gst_bin_add (GST_BIN (play->pipeline), audio_thread);
 
-	gst_bin_set_pre_iterate_function(
-				GST_BIN (audio_thread), 
-				(GstBinPrePostIterateFunction) callback_bin_pre_iterate,
-				play->audio_bin_mutex);
-	
-	gst_bin_set_post_iterate_function(
-				GST_BIN (audio_thread), 
-				(GstBinPrePostIterateFunction) callback_bin_post_iterate,
-				play->audio_bin_mutex);
-
 	return TRUE;
 }
 
@@ -481,16 +451,6 @@ gst_play_video_setup (	GstPlay *play,
 	}
 	g_hash_table_insert (play->other_elements, "audio_bin", audio_bin);
 
-	/* setting up iterate functions */	
-	gst_bin_set_pre_iterate_function (
-		GST_BIN (audio_bin), 
-		(GstBinPrePostIterateFunction) callback_bin_pre_iterate, 
-		play->audio_bin_mutex);
-	gst_bin_set_post_iterate_function (
-		GST_BIN (audio_bin), 
-		(GstBinPrePostIterateFunction) callback_bin_post_iterate, 
-		play->audio_bin_mutex);
-
 	/* adding all that stuff to bin */
 	gst_bin_add_many (
 		GST_BIN (audio_bin), audio_queue, play->volume, 
@@ -545,16 +505,6 @@ gst_play_video_setup (	GstPlay *play,
 	gst_element_link_many (video_queue, colorspace,
 			play->video_sink, NULL);
 	
-	/* setting up iterate functions */
-	gst_bin_set_pre_iterate_function (
-			GST_BIN (video_bin), 
-			(GstBinPrePostIterateFunction) callback_bin_pre_iterate, 
-			play->video_bin_mutex);
-	gst_bin_set_post_iterate_function (
-			GST_BIN (video_bin), 
-			(GstBinPrePostIterateFunction) callback_bin_post_iterate,
-			play->video_bin_mutex);
-	
 	gst_element_add_ghost_pad (
 			video_bin, gst_element_get_pad (video_queue, "sink"),
 			"sink");
@@ -824,16 +774,6 @@ gst_play_video_vis_setup (	GstPlay *play,
 								gst_element_get_pad (audio_queue, "sink"),
 								"sink");
 		
-	/* setting up iterate functions */	
-	gst_bin_set_pre_iterate_function (
-		GST_BIN (play->audio_sink), 
-		(GstBinPrePostIterateFunction) callback_bin_pre_iterate, 
-		play->audio_bin_mutex);
-	gst_bin_set_post_iterate_function (
-		GST_BIN (play->audio_sink), 
-		(GstBinPrePostIterateFunction) callback_bin_post_iterate, 
-		play->audio_bin_mutex);
-	
 	/* Creating video part of the visualisation bin
 		{ queue ! (visualisation) ! colorspace ! (videosink) }
 	*/
@@ -938,16 +878,6 @@ gst_play_video_vis_setup (	GstPlay *play,
 	gst_element_link_many (video_queue, colorspace,
 			play->video_sink, NULL);
 		
-	/* setting up iterate functions */
-	gst_bin_set_pre_iterate_function (
-			GST_BIN (video_bin), 
-			(GstBinPrePostIterateFunction) callback_bin_pre_iterate, 
-			play->video_bin_mutex);
-	gst_bin_set_post_iterate_function (
-			GST_BIN (video_bin), 
-			(GstBinPrePostIterateFunction) callback_bin_post_iterate,
-			play->video_bin_mutex);
-	
 	gst_element_add_ghost_pad (
 			video_bin, gst_element_get_pad (video_queue, "sink"),
 			"sink");