From 430dae62509e21d6082a032333c8e1182eb61a07 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sat, 28 Sep 2019 20:53:50 +0200
Subject: [PATCH] Add Signal to indicate global delay compensation status

---
 libs/ardour/ardour/latent.h | 5 +++++
 libs/ardour/latent.cc       | 1 +
 libs/ardour/session.cc      | 1 +
 3 files changed, 7 insertions(+)

diff --git a/libs/ardour/ardour/latent.h b/libs/ardour/ardour/latent.h
index 8135d2d45e..0e34d3c81a 100644
--- a/libs/ardour/ardour/latent.h
+++ b/libs/ardour/ardour/latent.h
@@ -73,13 +73,18 @@ public:
 	}
 
 	static void force_zero_latency (bool en) {
+		if (_zero_latency == en) {
+			return;
+		}
 		_zero_latency = en;
+		DisableSwitchChanged (); /* EMIT SIGNAL */
 	}
 
 	static bool zero_latency () {
 		return _zero_latency;
 	}
 
+	static PBD::Signal0<void> DisableSwitchChanged;
 	PBD::Signal0<void> LatencyChanged;
 
 protected:
diff --git a/libs/ardour/latent.cc b/libs/ardour/latent.cc
index 04c8affb59..c31b1ec545 100644
--- a/libs/ardour/latent.cc
+++ b/libs/ardour/latent.cc
@@ -23,6 +23,7 @@
 using namespace ARDOUR;
 
 bool ARDOUR::Latent::_zero_latency = false;
+PBD::Signal0<void> Latent::DisableSwitchChanged;
 
 Latent::Latent ()
 	: HasLatency ()
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 2848cd682a..6db282c1eb 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -449,6 +449,7 @@ Session::Session (AudioEngine &eng,
 	EndTimeChanged.connect_same_thread (*this, boost::bind (&Session::end_time_changed, this, _1));
 
 	LatentSend::ChangedLatency.connect_same_thread (*this, boost::bind (&Session::send_latency_compensation_change, this));
+	Latent::DisableSwitchChanged.connect_same_thread (*this, boost::bind (&Session::queue_latency_recompute, this));
 
 	emit_thread_start ();
 	auto_connect_thread_start ();