multiqueue: Don't start new pads until parented

Start task on new source pads added at runtime after they
have been added to the element, not during activation.

This ensures the pads can post their CREATE stream-status
messages and the application can set thread priorities.

https://bugzilla.gnome.org/show_bug.cgi?id=756867

diff --git a/plugins/elements/gstmultiqueue.c b/plugins/elements/gstmultiqueue.c
index 646923e..cb8054d 100644 (file)
--- a/plugins/elements/gstmultiqueue.c
+++ b/plugins/elements/gstmultiqueue.c
@@ -2502,7 +2502,7 @@ gst_multi_queue_src_activate_mode (GstPad * pad, GstObject * parent,
     case GST_PAD_MODE_PUSH:
       if (active) {
         gst_single_queue_flush (mq, sq, FALSE, TRUE);
-        result = gst_single_queue_start (mq, sq);
+        result = parent ? gst_single_queue_start (mq, sq) : TRUE;
       } else {
         gst_single_queue_flush (mq, sq, TRUE, TRUE);
         result = gst_single_queue_stop (mq, sq);
@@ -3075,6 +3075,9 @@ gst_single_queue_new (GstMultiQueue * mqueue, guint id)
   }
   gst_element_add_pad (GST_ELEMENT (mqueue), sq->srcpad);
   gst_element_add_pad (GST_ELEMENT (mqueue), sq->sinkpad);
+  if (GST_STATE_TARGET (mqueue) != GST_STATE_NULL) {
+    gst_single_queue_start (mqueue, sq);
+  }
   g_rec_mutex_unlock (GST_STATE_GET_LOCK (mqueue));
 
   GST_DEBUG_OBJECT (mqueue, "GstSingleQueue [%d] created and pads added",