2 Copyright (C) 2009 Paul Davis
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 "ardour/audioengine.h"
23 #include "ardour/beats_frames_converter.h"
24 #include "ardour/session.h"
25 #include "ardour/tempo.h"
30 BeatsFramesConverter::to(double beats) const
32 // FIXME: assumes tempo never changes after origin
33 const Tempo& tempo = _session.tempo_map().tempo_at(_origin);
34 const double frames_per_beat = tempo.frames_per_beat(
35 _session.engine().frame_rate(),
36 _session.tempo_map().meter_at(_origin));
38 return lrint(beats * frames_per_beat);
42 BeatsFramesConverter::from(sframes_t frames) const
44 // FIXME: assumes tempo never changes after origin
45 const Tempo& tempo = _session.tempo_map().tempo_at(_origin);
46 const double frames_per_beat = tempo.frames_per_beat(
47 _session.engine().frame_rate(),
48 _session.tempo_map().meter_at(_origin));
50 return frames / frames_per_beat;
53 } /* namespace ARDOUR */