cc7d4db5fe
git-svn-id: svn://localhost/ardour2/branches/3.0@11975 d708f5d6-7413-0410-9779-e7cbd77b26cf
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
/*
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Copyright (C) 2009 Paul Davis
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Author: David 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 "pbd/stacktrace.h"
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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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/** Takes a positive duration in beats and considers it as a distance from the origin
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* supplied to the constructor. Returns the equivalent number of frames,
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* taking tempo changes into account.
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*/
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framepos_t
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BeatsFramesConverter::to (double beats) const
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{
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if (beats < 0) {
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std::cerr << "negative beats passed to BFC: " << beats << std::endl;
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PBD::stacktrace (std::cerr, 30);
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}
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assert (beats >= 0);
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framecnt_t r = _tempo_map.framepos_plus_beats (_origin_b, beats) - _origin_b;
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return r;
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}
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/** Takes a duration in frames and considers it as a distance from the origin
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* supplied to the constructor. Returns the equivalent number of beats,
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* taking tempo changes into account.
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*/
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double
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BeatsFramesConverter::from (framepos_t frames) const
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{
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double b = _tempo_map.framewalk_to_beats (_origin_b, frames);
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return b;
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}
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} /* namespace ARDOUR */
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