From 4a2bed08ec57463f8d45f0184fb7a0004ae00f1e Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Thu, 4 Apr 2024 17:01:24 -0600
Subject: [PATCH] better libardour infrastructure for virtual soundcheck

---
 libs/ardour/ardour/session.h |  2 ++
 libs/ardour/route.cc         |  3 ++-
 libs/ardour/session.cc       | 17 +++++++++++++++++
 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index 6a5652b5ec..2cbd0f3fac 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -1411,6 +1411,7 @@ public:
 
 	void enable_virtual_soundcheck ();
 	void disable_virtual_soundcheck ();
+	bool virtual_soundcheck() const;
 	PBD::Signal1<void,bool> VirtualSoundCheckChanged;
 
 protected:
@@ -2426,6 +2427,7 @@ private:
 	uint32_t _no_file_format_reset;
 
 	void set_virtual_soundcheck (bool);
+	bool _virtual_soundcheck;
 };
 
 
diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index d944d1d2ea..3fa9ba11e9 100644
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -2843,6 +2843,7 @@ Route::set_state (const XMLNode& node, int version)
 		_volume_control.reset (new GainControl (_session, MainOutVolume));
 		_volume_control->set_flag (Controllable::NotAutomatable);
 		_main_outs->set_gain_control (_volume_control);
+		_volume_control->set_value (_session.virtual_soundcheck() ? 1. : 0., PBD::Controllable::NoGroup);
 	}
 
 	set_processor_state (processor_state, version);
@@ -3537,7 +3538,7 @@ Route::create_master_send ()
 {
 	_master_send.reset (new InternalSend (_session, pannable(), _mute_master, std::dynamic_pointer_cast<Route> (shared_from_this()), _session.master_out(), Delivery::MasterSend, false));
 	_master_send->set_display_to_user (false);
-	_master_send->gain_control()->set_value (dB_to_coefficient (0.0), Controllable::NoGroup);
+	_master_send->gain_control()->set_value (_session.virtual_soundcheck() ? 0. : 1., Controllable::NoGroup);
 }
 
 void
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index d9303948a7..bd44230334 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -349,6 +349,7 @@ Session::Session (AudioEngine &eng,
 	, _active_cue (-1)
 	, tb_with_filled_slots (0)
 	, _no_file_format_reset (0)
+	, _virtual_soundcheck (false)
 {
 	_suspend_save.store (0);
 	_playback_load.store (0);
@@ -8254,6 +8255,10 @@ Session::disable_virtual_soundcheck ()
 void
 Session::set_virtual_soundcheck (bool yn)
 {
+	if (!Profile->get_livetrax()) {
+		return;
+	}
+
 	std::shared_ptr<RouteList const> rl = routes.reader ();
 	std::shared_ptr<AutomationControlList> master_sends (new AutomationControlList);
 	std::shared_ptr<AutomationControlList> main_outs (new AutomationControlList);
@@ -8277,5 +8282,17 @@ Session::set_virtual_soundcheck (bool yn)
 		set_controls (main_outs, main_val, PBD::Controllable::NoGroup);
 	}
 
+	_virtual_soundcheck = yn;
+
 	VirtualSoundCheckChanged (yn); /* EMIT SIGNAL */
 }
+
+bool
+Session::virtual_soundcheck () const
+{
+	if (!Profile->get_livetrax()) {
+		return false;
+	}
+
+	return _virtual_soundcheck;
+}