From 55094b723774086d0f54d688b1ca73a4df82b93e Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Tue, 12 Jan 2016 22:04:18 -0500
Subject: move Amp::GainControl out into its own source module and out of Amp

---
 libs/ardour/gain_control.cc | 92 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 libs/ardour/gain_control.cc

(limited to 'libs/ardour/gain_control.cc')

diff --git a/libs/ardour/gain_control.cc b/libs/ardour/gain_control.cc
new file mode 100644
index 0000000000..9314e1270e
--- /dev/null
+++ b/libs/ardour/gain_control.cc
@@ -0,0 +1,92 @@
+/*
+    Copyright (C) 2006-2016 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/dB.h"
+#include "ardour/gain_control.h"
+#include "ardour/session.h"
+
+#include "i18n.h"
+
+using namespace ARDOUR;
+using namespace std;
+
+GainControl::GainControl (Session& session, const Evoral::Parameter &param, boost::shared_ptr<AutomationList> al)
+	: AutomationControl (session, param, ParameterDescriptor(param),
+	                     al ? al : boost::shared_ptr<AutomationList> (new AutomationList (param)),
+	                     param.type() == GainAutomation ? X_("gaincontrol") : X_("trimcontrol")) {
+
+	alist()->reset_default (1.0);
+
+	lower_db = accurate_coefficient_to_dB (_desc.lower);
+	range_db = accurate_coefficient_to_dB (_desc.upper) - lower_db;
+}
+
+void
+GainControl::set_value (double val, PBD::Controllable::GroupControlDisposition /* group_override */)
+{
+	if (writable()) {
+		set_value_unchecked (val);
+	}
+}
+
+void
+GainControl::set_value_unchecked (double val)
+{
+	AutomationControl::set_value (std::max (std::min (val, (double)_desc.upper), (double)_desc.lower), Controllable::NoGroup);
+	_session.set_dirty ();
+}
+
+double
+GainControl::internal_to_interface (double v) const
+{
+	if (_desc.type == GainAutomation) {
+		return gain_to_slider_position (v);
+	} else {
+		return (accurate_coefficient_to_dB (v) - lower_db) / range_db;
+	}
+}
+
+double
+GainControl::interface_to_internal (double v) const
+{
+	if (_desc.type == GainAutomation) {
+		return slider_position_to_gain (v);
+	} else {
+		return dB_to_coefficient (lower_db + v * range_db);
+	}
+}
+
+double
+GainControl::internal_to_user (double v) const
+{
+	return accurate_coefficient_to_dB (v);
+}
+
+double
+GainControl::user_to_internal (double u) const
+{
+	return dB_to_coefficient (u);
+}
+
+std::string
+GainControl::get_user_string () const
+{
+	char theBuf[32]; sprintf( theBuf, _("%3.1f dB"), accurate_coefficient_to_dB (get_value()));
+	return std::string(theBuf);
+}
+
-- 
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