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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 "ardour/beats_frames_converter.h"
#include "ardour/tempo.h"
namespace ARDOUR {
/** Takes a positive duration in beats and considers it as a distance from the origin
* supplied to the constructor. Returns the equivalent number of frames,
* taking tempo changes into account.
*/
framecnt_t
BeatsFramesConverter::to (double beats) const
{
assert (beats >= 0);
framecnt_t r = _tempo_map.framepos_plus_beats (_origin_b, beats) - _origin_b;
return r;
}
/** Takes a duration in frames and considers it as a distance from the origin
* supplied to the constructor. Returns the equivalent number of beats,
* taking tempo changes into account.
*/
double
BeatsFramesConverter::from (framecnt_t frames) const
{
double b = _tempo_map.framewalk_to_beats (_origin_b, frames);
return b;
}
} /* namespace ARDOUR */
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