libs/ardour/beats_frames_converter.cc

   1 /*
   2     Copyright (C) 2009 Paul Davis
   3     Author: David Robillard
   4
   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.
   9
  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.
  14
  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.
  18
  19     $Id: midiregion.h 733 2006-08-01 17:19:38Z drobilla $
  20 */
  21
  22 #include "ardour/beats_frames_converter.h"
  23 #include "ardour/tempo.h"
  24
  25 namespace ARDOUR {
  26
  27 framecnt_t
  28 BeatsFramesConverter::to (double beats) const
  29 {
  30         assert (beats >= 0);
  31
  32         return _tempo_map.framepos_plus_bbt (_origin_b, Timecode::BBT_Time(beats)) - _origin_b;
  33 }
  34
  35 double
  36 BeatsFramesConverter::from (framecnt_t frames) const
  37 {
  38         return _tempo_map.framewalk_to_beats (_origin_b, frames);
  39 }
  40
  41 } /* namespace ARDOUR */
  42