Add signals indicating last-capture-source changes

libs/ardour/ardour/session.h

@@ -432,6 +432,9 @@ public:
 
 	PBD::Signal<void()> UpdateRouteRecordState; /* signals potential change in route recording arming */
 
+	PBD::Signal<void()> RecordPassCompleted;
+	PBD::Signal<void()> ClearedLastCaptureSources;
+
 	/* Emited when session is loaded */
 	PBD::Signal<void()> SessionLoaded;
 

libs/ardour/session.cc

@@ -4867,6 +4867,7 @@ Session::reset_last_capture_sources ()
 		}
 		tr->reset_last_capture_sources ();
 	}
+	ClearedLastCaptureSources (); /* EMIT SIGNAL */
 }
 
 /* Source Management */

libs/ardour/session_transport.cc

@@ -1617,6 +1617,10 @@ Session::non_realtime_stop (bool abort, int on_entry, bool& finished, bool will_
 		}
 	}
 
+	if (!abort && did_record) {
+		RecordPassCompleted (); /* EMIT SIGNAL */
+	}
+
 	/* save the current state of things if appropriate */
 
 	if (did_record && !saved) {