initially pass at libardour VCA implementation

1 files changed, 62 insertions, 0 deletions

diff --git a/libs/ardour/vca.cc b/libs/ardour/vca.cc
new file mode 100644
index 0000000000..7580d5794a
--- /dev/null
+++ b/libs/ardour/vca.cc
@@ -0,0 +1,62 @@
+/*
+    Copyright (C) 2016 Paul Davis
+
+    This program is free software; you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by the Free
+    Software Foundation; either version 2 of the License, or (at your option)
+    any later version.
+
+    This program is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "ardour/automation_control.h"
+#include "ardour/gain_control.h"
+#include "ardour/route.h"
+#include "ardour/vca.h"
+
+using namespace ARDOUR;
+using namespace PBD;
+using std::string;
+
+VCA::VCA (Session& s, const string& n)
+	: SessionHandleRef (s)
+	, name (n)
+	, _control (new GainControl (s, Evoral::Parameter (GainAutomation), boost::shared_ptr<AutomationList> ()))
+{
+}
+
+void
+VCA::set_value (double val, Controllable::GroupControlDisposition gcd)
+{
+	_control->set_value (val, gcd);
+}
+
+double
+VCA::get_value() const
+{
+	return _control->get_value();
+}
+
+void
+VCA::add (boost::shared_ptr<Route> r)
+{
+	boost::dynamic_pointer_cast<GainControl>(r->gain_control())->set_master (_control);
+}
+
+void
+VCA::remove (boost::shared_ptr<Route> r)
+{
+	boost::shared_ptr<GainControl> route_gain = boost::dynamic_pointer_cast<GainControl>(r->gain_control());
+	boost::shared_ptr<GainControl> current_master = route_gain->master();
+
+	if (current_master == _control) {
+		route_gain->set_master (boost::shared_ptr<GainControl>());
+	}
+}