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Diffstat (limited to 'libs/ardour/automation_control.cc')
-rw-r--r-- | libs/ardour/automation_control.cc | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/libs/ardour/automation_control.cc b/libs/ardour/automation_control.cc new file mode 100644 index 0000000000..4885a6fed9 --- /dev/null +++ b/libs/ardour/automation_control.cc @@ -0,0 +1,91 @@ +/* + Copyright (C) 2007 Paul Davis + Author: Dave Robillard + + 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 <iostream> +#include <ardour/automation_control.h> +#include <ardour/session.h> +#include <ardour/automatable.h> +#include <ardour/midi_track.h> + +using namespace std; +using namespace ARDOUR; +using namespace PBD; + + +AutomationControl::AutomationControl(Session& session, boost::shared_ptr<AutomationList> list, string name) + : Controllable((name == "unnamed controllable") ? list->parameter().to_string() : name) + , _session(session) + , _list(list) + , _user_value(list->default_value()) +{ +} + + +/** Get the currently effective value (ie the one that corresponds to current output) + */ +float +AutomationControl::get_value() const +{ + if (_list->automation_playback()) + return _list->eval(_session.transport_frame()); + else + return _user_value; +} + + +void +AutomationControl::set_value(float value) +{ + _user_value = value; + + if (_session.transport_stopped() && _list->automation_write()) + _list->add(_session.transport_frame(), value); + + Changed(); /* EMIT SIGNAL */ +} + + +/** Get the latest user-set value, which may not equal get_value() when automation + * is playing back, etc. + * + * Automation write/touch works by periodically sampling this value and adding it + * to the AutomationList. + */ +float +AutomationControl::user_value() const +{ + return _user_value; +} + + +void +AutomationControl::set_list(boost::shared_ptr<ARDOUR::AutomationList> list) +{ + _list = list; + _user_value = list->default_value(); + Changed(); /* EMIT SIGNAL */ +} + + +Parameter +AutomationControl::parameter() const +{ + return _list->parameter(); +} |