AgsMessageDelivery is a singleton. In order to get the instance of it call
AgsMessageDelivery* ags_message_delivery_get_instance().
The library routines only provide messages until you have added an AgsMessageQueue with the
appropriate namespace.
- libags - namespace used by libags.so.3, libags_thread.so.3 and libags_server.so.3
- libags-audio - namespace used by libags_audio.so.3
As you usually have one object or widget mapped to a specific object, you can poll the queue
by guint g_timeout_add(guint, GSourceFunc, gpointer). Then forward
the event as you like. GSequencer does look for matching messages by sender using following
GList* ags_message_queue_find_sender(AgsMessageQueue*, GObject*).
This not at least because the recipient is most of the time not defined.