2 Copyright (C) 2007 Paul Davis
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include <ardour/automation_control.h>
23 #include <ardour/session.h>
24 #include <ardour/automatable.h>
27 using namespace ARDOUR;
31 AutomationControl::AutomationControl(Session& session, boost::shared_ptr<AutomationList> list, string name)
32 : Controllable((name == "unnamed controllable") ? list->parameter().to_string() : name)
35 , _user_value(list->default_value())
37 cerr << "Created AutomationControl " << name << "(" << list->parameter().to_string() << ")" << endl;
41 /** Get the currently effective value (ie the one that corresponds to current output)
44 AutomationControl::get_value() const
46 if (_list->automation_playback())
47 return _list->eval(_session.transport_frame());
54 AutomationControl::set_value(float value)
58 if (_session.transport_stopped() && _list->automation_write())
59 _list->add(_session.transport_frame(), value);
61 Changed(); /* EMIT SIGNAL */
65 /** Get the latest user-set value, which may not equal get_value() when automation
66 * is playing back, etc.
68 * Automation write/touch works by periodically sampling this value and adding it
69 * to the AutomationList.
72 AutomationControl::user_value() const
79 AutomationControl::set_list(boost::shared_ptr<ARDOUR::AutomationList> list)
82 _user_value = list->default_value();
83 Changed(); /* EMIT SIGNAL */
88 AutomationControl::parameter() const
90 return _list->parameter();