livetrax/libs/evoral/src/Control.cpp

/* This file is part of Evoral.
 * Copyright (C) 2008 Dave Robillard <http://drobilla.net>
 * Copyright (C) 2000-2008 Paul Davis
 * 
 * Evoral 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.
 * 
 * Evoral 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 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.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <iostream>
#include <evoral/Control.hpp>
#include <evoral/ControlList.hpp>

namespace Evoral {

Parameter::TypeMetadata Parameter::_type_metadata;

Control::Control(const Parameter& parameter, boost::shared_ptr<ControlList> list)
	: _parameter(parameter)
	, _list(list)
	, _user_value(list ? list->default_value() : parameter.normal())
{
}


/** Get the currently effective value (ie the one that corresponds to current output)
 */
float
Control::get_float(bool from_list, FrameTime frame) const
{
	if (from_list)
		return _list->eval(frame);
	else
		return _user_value;
}


void
Control::set_float(float value, bool to_list, FrameTime frame)
{
	_user_value = value;
	
	if (to_list)
		_list->add(frame, value);
}


/** 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
Control::user_float() const
{
	return _user_value;
}
	

void
Control::set_list(boost::shared_ptr<ControlList> list)
{
	_list = list;
}

} // namespace Evoral