2 Copyright (C) 2009 Paul Davis
3 Author: David Robillard
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.
19 $Id: midiregion.h 733 2006-08-01 17:19:38Z drobilla $
22 #include "evoral/Beats.hpp"
23 #include "evoral/TimeConverter.hpp"
25 #include "ardour/libardour_visibility.h"
26 #include "ardour/types.h"
28 #ifndef __ardour_beats_frames_converter_h__
29 #define __ardour_beats_frames_converter_h__
35 /** Converter between beats and frames. Takes distances in beats or frames
36 * from some origin (supplied to the constructor in frames), and converts
37 * them to the opposite unit, taking tempo changes into account.
39 class LIBARDOUR_API BeatsFramesConverter
40 : public Evoral::TimeConverter<Evoral::Beats,framepos_t> {
42 BeatsFramesConverter (TempoMap& tempo_map, framepos_t origin)
43 : Evoral::TimeConverter<Evoral::Beats, framepos_t> (origin)
44 , _tempo_map(tempo_map)
47 framepos_t to (Evoral::Beats beats) const;
48 Evoral::Beats from (framepos_t frames) const;
54 /** Converter between beats and frames. Takes distances in beats or frames
55 * from some origin (supplied to the constructor in frames), and converts
56 * them to the opposite unit, taking tempo changes into account.
58 class LIBARDOUR_API DoubleBeatsFramesConverter
59 : public Evoral::TimeConverter<double,framepos_t> {
61 DoubleBeatsFramesConverter (TempoMap& tempo_map, framepos_t origin)
62 : Evoral::TimeConverter<double, framepos_t> (origin)
63 , _tempo_map(tempo_map)
66 framepos_t to (double beats) const;
67 double from (framepos_t frames) const;
73 } /* namespace ARDOUR */
75 #endif /* __ardour_beats_frames_converter_h__ */