2 Copyright (C) 2006-2016 Paul Davis
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2 of the License, or (at your option)
9 This program is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, write to the Free Software Foundation, Inc.,
16 675 Mass Ave, Cambridge, MA 02139, USA.
19 #include "ardour/dB.h"
20 #include "ardour/gain_control.h"
21 #include "ardour/session.h"
25 using namespace ARDOUR;
28 GainControl::GainControl (Session& session, const Evoral::Parameter ¶m, boost::shared_ptr<AutomationList> al)
29 : AutomationControl (session, param, ParameterDescriptor(param),
30 al ? al : boost::shared_ptr<AutomationList> (new AutomationList (param)),
31 param.type() == GainAutomation ? X_("gaincontrol") : X_("trimcontrol")) {
33 alist()->reset_default (1.0);
35 lower_db = accurate_coefficient_to_dB (_desc.lower);
36 range_db = accurate_coefficient_to_dB (_desc.upper) - lower_db;
40 GainControl::set_value (double val, PBD::Controllable::GroupControlDisposition group_override)
43 _set_value (val, group_override);
48 GainControl::set_value_unchecked (double val)
50 /* used only automation playback */
51 _set_value (val, Controllable::NoGroup);
55 GainControl::_set_value (double val, Controllable::GroupControlDisposition group_override)
57 AutomationControl::set_value (std::max (std::min (val, (double)_desc.upper), (double)_desc.lower), group_override);
58 _session.set_dirty ();
62 GainControl::internal_to_interface (double v) const
64 if (_desc.type == GainAutomation) {
65 return gain_to_slider_position (v);
67 return (accurate_coefficient_to_dB (v) - lower_db) / range_db;
72 GainControl::interface_to_internal (double v) const
74 if (_desc.type == GainAutomation) {
75 return slider_position_to_gain (v);
77 return dB_to_coefficient (lower_db + v * range_db);
82 GainControl::internal_to_user (double v) const
84 return accurate_coefficient_to_dB (v);
88 GainControl::user_to_internal (double u) const
90 return dB_to_coefficient (u);
94 GainControl::get_user_string () const
96 char theBuf[32]; sprintf( theBuf, _("%3.1f dB"), accurate_coefficient_to_dB (get_value()));
97 return std::string(theBuf);
101 GainControl::get_master_gain () const
103 Glib::Threads::Mutex::Lock sm (master_lock, Glib::Threads::TRY_LOCK);
106 return get_master_gain_locked ();
113 GainControl::get_master_gain_locked () const
115 /* Master lock MUST be held */
119 for (Masters::const_iterator m = _masters.begin(); m != _masters.end(); ++m) {
120 g *= (*m)->get_value ();
127 GainControl::add_master (boost::shared_ptr<GainControl> m)
129 gain_t old_master_val;
130 gain_t new_master_val;
133 Glib::Threads::Mutex::Lock lm (master_lock);
134 old_master_val = get_master_gain_locked ();
135 _masters.push_back (m);
136 new_master_val = get_master_gain_locked ();
139 if (old_master_val != new_master_val) {
140 Changed(); /* EMIT SIGNAL */
145 GainControl::remove_master (boost::shared_ptr<GainControl> m)
147 gain_t old_master_val;
148 gain_t new_master_val;
151 Glib::Threads::Mutex::Lock lm (master_lock);
152 old_master_val = get_master_gain_locked ();
154 new_master_val = get_master_gain_locked ();
157 if (old_master_val != new_master_val) {
158 Changed(); /* EMIT SIGNAL */
163 GainControl::clear_masters ()
165 gain_t old_master_val;
166 gain_t new_master_val;
169 Glib::Threads::Mutex::Lock lm (master_lock);
170 old_master_val = get_master_gain_locked ();
172 new_master_val = get_master_gain_locked ();
175 if (old_master_val != new_master_val) {
176 Changed(); /* EMIT SIGNAL */
181 GainControl::slaved_to (boost::shared_ptr<GainControl> gc) const
183 Glib::Threads::Mutex::Lock lm (master_lock);
184 return find (_masters.begin(), _masters.end(), gc) != _masters.end();