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/*
Copyright (C) 2009 Paul Davis
Author: Dave 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 "ardour/audioengine.h"
#include "ardour/beats_frames_converter.h"
#include "ardour/session.h"
#include "ardour/tempo.h"
namespace ARDOUR {
sframes_t
BeatsFramesConverter::to(double beats) const
{
// FIXME: assumes tempo never changes after origin
const Tempo& tempo = _session.tempo_map().tempo_at(_origin);
const double frames_per_beat = tempo.frames_per_beat(
_session.engine().frame_rate(),
_session.tempo_map().meter_at(_origin));
return lrint(beats * frames_per_beat);
}
double
BeatsFramesConverter::from(sframes_t frames) const
{
// FIXME: assumes tempo never changes after origin
const Tempo& tempo = _session.tempo_map().tempo_at(_origin);
const double frames_per_beat = tempo.frames_per_beat(
_session.engine().frame_rate(),
_session.tempo_map().meter_at(_origin));
return frames / frames_per_beat;
}
} /* namespace ARDOUR */
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