David Robillard
01b761bbaa
More constey TempoMap accessors. git-svn-id: svn://localhost/ardour2/branches/3.0@5916 d708f5d6-7413-0410-9779-e7cbd77b26cf
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
/*
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Copyright (C) 2009 Paul Davis
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Author: Dave Robillard
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: midiregion.h 733 2006-08-01 17:19:38Z drobilla $
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*/
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#include "ardour/beats_frames_converter.h"
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#include "ardour/tempo.h"
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namespace ARDOUR {
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sframes_t
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BeatsFramesConverter::to(double beats) const
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{
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// FIXME: assumes tempo never changes after origin
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const Tempo& tempo = _tempo_map.tempo_at(_origin);
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const double frames_per_beat = tempo.frames_per_beat(
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_tempo_map.frame_rate(),
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_tempo_map.meter_at(_origin));
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return lrint(beats * frames_per_beat);
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}
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double
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BeatsFramesConverter::from(sframes_t frames) const
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{
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// FIXME: assumes tempo never changes after origin
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const Tempo& tempo = _tempo_map.tempo_at(_origin);
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const double frames_per_beat = tempo.frames_per_beat(
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_tempo_map.frame_rate(),
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_tempo_map.meter_at(_origin));
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return frames / frames_per_beat;
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}
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} /* namespace ARDOUR */
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