From b8202431efa5e0f52a2d672e5cc4dcae9aa0bda7 Mon Sep 17 00:00:00 2001
From: Len Ovens <len@ovenwerks.net>
Date: Fri, 8 May 2020 23:18:26 -0700
Subject: [PATCH] Add foldback bus dulication option

	Duplicates the bus and its sends and levels
---
 gtk2_ardour/foldback_strip.cc | 41 +++++++++++++++++++++++++++++++++++
 gtk2_ardour/foldback_strip.h  |  2 +-
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/gtk2_ardour/foldback_strip.cc b/gtk2_ardour/foldback_strip.cc
index d477f384f9..56c1cae126 100644
--- a/gtk2_ardour/foldback_strip.cc
+++ b/gtk2_ardour/foldback_strip.cc
@@ -1189,6 +1189,8 @@ FoldbackStrip::build_route_ops_menu ()
 
 	items.push_back (MenuElem (_("Rename..."), sigc::mem_fun(*this, &RouteUI::route_rename)));
 
+	items.push_back (MenuElem (_("Duplicate Foldback Bus"), sigc::mem_fun(*this, &FoldbackStrip::duplicate_current_fb)));
+
 	items.push_back (SeparatorElem());
 	items.push_back (CheckMenuElem (_("Active")));
 	Gtk::CheckMenuItem* i = dynamic_cast<Gtk::CheckMenuItem *> (&items.back());
@@ -1638,6 +1640,45 @@ FoldbackStrip::build_sends_menu ()
 	return menu;
 }
 
+void
+FoldbackStrip::duplicate_current_fb ()
+{
+	RouteList new_rt_lst;
+	boost::shared_ptr<Route> new_fb;
+	boost::shared_ptr<Route> old_fb = _route;
+	string new_name_tp = "Foldback";
+	// get number of io so long as it is 1 or 2
+	uint32_t io = 1;
+	if (old_fb->n_outputs().n_audio() && (old_fb->n_outputs().n_audio() > 1)) {
+		io = 2;
+	}
+
+	new_rt_lst = _session->new_audio_route (io, io, 0, 1, new_name_tp, PresentationInfo::FoldbackBus, (uint32_t) -1);
+	new_fb = *(new_rt_lst.begin());
+	if (new_fb) {
+		double oldgain = old_fb->gain_control()->get_value();
+		new_fb->gain_control()->set_value (oldgain * 0.25,  PBD::Controllable::NoGroup);
+
+		Route::FedBy fed_by = old_fb->fed_by();
+		for (Route::FedBy::iterator i = fed_by.begin(); i != fed_by.end(); ++i) {
+			if (i->sends_only) {
+				boost::shared_ptr<Route> rt (i->r.lock());
+				boost::shared_ptr<Send> old_snd = rt->internal_send_for (old_fb);
+				rt->add_foldback_send (new_fb);
+				if (old_snd) {
+					float old_gain = old_snd->gain_control()->get_value ();
+					boost::shared_ptr<Send> new_snd = rt->internal_send_for (new_fb);
+					new_snd->gain_control()->set_value (old_gain, PBD::Controllable::NoGroup);
+				}
+			}
+		}
+		set_route (new_fb);
+		route_rename ();
+	} else {
+		PBD::error << "Unable to create new FoldbackBus." << endmsg;
+	}
+}
+
 void
 FoldbackStrip::remove_current_fb ()
 {
diff --git a/gtk2_ardour/foldback_strip.h b/gtk2_ardour/foldback_strip.h
index faabb0ca43..a4902cb8c7 100644
--- a/gtk2_ardour/foldback_strip.h
+++ b/gtk2_ardour/foldback_strip.h
@@ -161,7 +161,7 @@ public:
 	bool delete_processors ();  //note: returns false if nothing was deleted
 	void toggle_processors ();
 	void ab_plugins ();
-
+	void duplicate_current_fb ();
 	void set_selected (bool yn);
 
 	static FoldbackStrip* entered_foldback_strip() { return _entered_foldback_strip; }