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/*
* Copyright (C) 2008-2014 David Robillard <d@drobilla.net>
* Copyright (C) 2010-2012 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2010-2013 Paul Davis <paul@linuxaudiosystems.com>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef EVORAL_CONTROL_HPP
#define EVORAL_CONTROL_HPP
#include <set>
#include <map>
#include <boost/shared_ptr.hpp>
#include "pbd/signals.h"
#include "evoral/visibility.h"
#include "evoral/Parameter.h"
#include "evoral/ParameterDescriptor.h"
namespace Evoral {
class ControlList;
class ParameterDescriptor;
class Transport;
class TypeMap;
/** Base class representing some kind of (automatable) control; a fader's gain,
* for example, or a compressor plugin's threshold.
*
* The class knows the Evoral::Parameter that it is controlling, and has
* a list of values for automation.
*/
class LIBEVORAL_API Control
{
public:
Control(const Parameter& parameter,
const ParameterDescriptor& desc,
boost::shared_ptr<ControlList> list);
virtual ~Control() {}
virtual void set_double (double val, double frame=0, bool to_list=false);
virtual double get_double (bool from_list=false, double frame=0) const;
/** Get the latest user-set value
* (which may not equal get_value() when automation is playing back).
*
* Automation write/touch works by periodically sampling this value
* and adding it to the ControlList.
*/
double user_double() const { return _user_value; }
void set_list(boost::shared_ptr<ControlList>);
boost::shared_ptr<ControlList> list() { return _list; }
boost::shared_ptr<const ControlList> list() const { return _list; }
inline const Parameter& parameter() const { return _parameter; }
/** Emitted when the our ControlList is marked dirty */
PBD::Signal0<void> ListMarkedDirty;
protected:
Parameter _parameter;
boost::shared_ptr<ControlList> _list;
double _user_value;
PBD::ScopedConnection _list_marked_dirty_connection;
private:
void list_marked_dirty ();
};
} // namespace Evoral
#endif // EVORAL_CONTROL_HPP
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