From 220fa45d353bbbbdfcb6efb906189173bb4d88e9 Mon Sep 17 00:00:00 2001
From: Len Ovens <len@ovenwerks.net>
Date: Mon, 26 Aug 2019 12:52:21 -0700
Subject: [PATCH] Add signal for foldback send add or remove

---
 libs/ardour/ardour/session.h |  8 ++++++--
 libs/ardour/route.cc         | 11 +++++++++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index 81c692580a..d2d0b39dbd 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -425,6 +425,10 @@ public:
 	 */
 	PBD::Signal2<void, RouteGroup *, boost::weak_ptr<Route> > RouteRemovedFromRouteGroup;
 
+	/** Emitted when a foldback send is created or deleted
+	 */
+	PBD::Signal0<void> FBSendsChanged;
+
 	/* Step Editing status changed */
 	PBD::Signal1<void,bool> StepEditStatusChange;
 
@@ -1782,9 +1786,9 @@ public:
 			f ( (*i).second );
 		}
 	}
-	
+
 	bool playlist_is_active( boost::shared_ptr<Playlist>);
-	
+
 private:
 	void reset_write_sources (bool mark_write_complete, bool force = false);
 	SourceMap sources;
diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index 075ccd72c1..962f23bda1 100644
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -3312,6 +3312,7 @@ Route::add_foldback_send (boost::shared_ptr<Route> route)
 	} catch (failed_constructor& err) {
 		return -1;
 	}
+	_session.FBSendsChanged ();
 
 	return 0;
 }
@@ -3321,6 +3322,7 @@ Route::remove_aux_or_listen (boost::shared_ptr<Route> route)
 {
 	ProcessorStreams err;
 	ProcessorList::iterator tmp;
+	bool do_fb_signal = false;
 
 	{
 		Glib::Threads::RWLock::ReaderLock rl(_processor_lock);
@@ -3339,6 +3341,11 @@ Route::remove_aux_or_listen (boost::shared_ptr<Route> route)
 			boost::shared_ptr<InternalSend> d = boost::dynamic_pointer_cast<InternalSend>(*x);
 
 			if (d && d->target_route() == route) {
+				boost::shared_ptr<Send> snd = boost::dynamic_pointer_cast<Send>(d);
+				if (snd && snd->is_foldback()) {
+					do_fb_signal = true;
+				}
+
 				rl.release ();
 				if (remove_processor (*x, &err, false) > 0) {
 					rl.acquire ();
@@ -3358,6 +3365,10 @@ Route::remove_aux_or_listen (boost::shared_ptr<Route> route)
 			}
 		}
 	}
+	if (do_fb_signal) {
+		_session.FBSendsChanged ();
+	}
+
 }
 
 void