From d59739d728870843b39901a48216fe9109be6641 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Mon, 14 Dec 2015 13:28:24 -0500
Subject: [PATCH] faderport: add 100msec (10Hz) periodic update to facilitate
 automation playback

---
 libs/surfaces/faderport/faderport.cc | 20 ++++++++++++++++++++
 libs/surfaces/faderport/faderport.h  |  3 +++
 2 files changed, 23 insertions(+)

diff --git a/libs/surfaces/faderport/faderport.cc b/libs/surfaces/faderport/faderport.cc
index 46ff569c43..1f5352fdec 100644
--- a/libs/surfaces/faderport/faderport.cc
+++ b/libs/surfaces/faderport/faderport.cc
@@ -560,6 +560,10 @@ FaderPort::set_active (bool yn)
 		blink_connection = blink_timeout->connect (sigc::mem_fun (*this, &FaderPort::blink));
 		blink_timeout->attach (main_loop()->get_context());
 
+		Glib::RefPtr<Glib::TimeoutSource> periodic_timeout = Glib::TimeoutSource::create (100); // milliseconds
+		periodic_connection = blink_timeout->connect (sigc::mem_fun (*this, &FaderPort::periodic));
+		periodic_timeout->attach (main_loop()->get_context());
+
 	} else {
 
 		BaseUI::quit ();
@@ -574,6 +578,22 @@ FaderPort::set_active (bool yn)
 	return 0;
 }
 
+bool
+FaderPort::periodic ()
+{
+	if (!_current_route) {
+		return true;
+	}
+
+	ARDOUR::AutoState gain_state = _current_route->gain_control()->automation_state();
+
+	if (gain_state == ARDOUR::Touch || gain_state == ARDOUR::Play) {
+		map_gain ();
+	}
+
+	return true;
+}
+
 void
 FaderPort::stop_blinking (ButtonID id)
 {
diff --git a/libs/surfaces/faderport/faderport.h b/libs/surfaces/faderport/faderport.h
index 9227f1f39f..6643e22369 100644
--- a/libs/surfaces/faderport/faderport.h
+++ b/libs/surfaces/faderport/faderport.h
@@ -281,6 +281,9 @@ class FaderPort : public ARDOUR::ControlProtocol, public AbstractUI<FaderPortReq
 	void map_recenable_state ();
 	void map_transport_state ();
 
+	sigc::connection periodic_connection;
+	bool periodic ();
+
 	sigc::connection blink_connection;
 	typedef std::list<ButtonID> Blinkers;
 	Blinkers blinkers;