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/*
Copyright (C) 2009 Paul Davis
Author: David 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.
$Id: midiregion.h 733 2006-08-01 17:19:38Z drobilla $
*/
#include "evoral/Beats.hpp"
#include "evoral/TimeConverter.hpp"
#include "ardour/libardour_visibility.h"
#include "ardour/types.h"
#ifndef __ardour_beats_frames_converter_h__
#define __ardour_beats_frames_converter_h__
namespace ARDOUR {
class TempoMap;
/** Converter between quarter-note beats and frames. Takes distances in quarter-note beats or frames
* from some origin (supplied to the constructor in frames), and converts
* them to the opposite unit, taking tempo changes into account.
*/
class LIBARDOUR_API BeatsFramesConverter
: public Evoral::TimeConverter<Evoral::Beats,framepos_t> {
public:
BeatsFramesConverter (TempoMap& tempo_map, framepos_t origin)
: Evoral::TimeConverter<Evoral::Beats, framepos_t> (origin)
, _tempo_map(tempo_map)
{}
framepos_t to (Evoral::Beats beats) const;
Evoral::Beats from (framepos_t frames) const;
private:
TempoMap& _tempo_map;
};
/** Converter between quarter-note beats and frames. Takes distances in quarter-note beats or frames
* from some origin (supplied to the constructor in frames), and converts
* them to the opposite unit, taking tempo changes into account.
*/
class LIBARDOUR_API DoubleBeatsFramesConverter
: public Evoral::TimeConverter<double,framepos_t> {
public:
DoubleBeatsFramesConverter (TempoMap& tempo_map, framepos_t origin)
: Evoral::TimeConverter<double, framepos_t> (origin)
, _tempo_map(tempo_map)
{}
framepos_t to (double beats) const;
double from (framepos_t frames) const;
private:
TempoMap& _tempo_map;
};
} /* namespace ARDOUR */
#endif /* __ardour_beats_frames_converter_h__ */
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