2 Copyright (C) 2009 Paul Davis
3 Author: David Robillard
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.
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.
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.
19 $Id: midiregion.h 733 2006-08-01 17:19:38Z drobilla $
22 #include "pbd/stacktrace.h"
24 #include "ardour/beats_samples_converter.h"
25 #include "ardour/tempo.h"
29 /** Takes a positive duration in quarter-note beats and considers it as a distance from the origin
30 * supplied to the constructor. Returns the equivalent number of samples,
31 * taking tempo changes into account.
34 BeatsSamplesConverter::to (Temporal::Beats beats) const
36 if (beats < Temporal::Beats()) {
37 std::cerr << "negative beats passed to BFC: " << beats << std::endl;
38 PBD::stacktrace (std::cerr, 30);
41 return _tempo_map.samplepos_plus_qn (_origin_b, beats) - _origin_b;
44 /** Takes a duration in samples and considers it as a distance from the origin
45 * supplied to the constructor. Returns the equivalent number of quarter-note beats,
46 * taking tempo changes into account.
49 BeatsSamplesConverter::from (samplepos_t samples) const
51 return _tempo_map.framewalk_to_qn (_origin_b, samples);
54 /** As above, but with quarter-note beats in double instead (for GUI). */
56 DoubleBeatsSamplesConverter::to (double beats) const
59 std::cerr << "negative beats passed to BFC: " << beats << std::endl;
60 PBD::stacktrace (std::cerr, 30);
63 return _tempo_map.samplepos_plus_qn (_origin_b, Temporal::Beats(beats)) - _origin_b;
66 /** As above, but with quarter-note beats in double instead (for GUI). */
68 DoubleBeatsSamplesConverter::from (samplepos_t samples) const
70 return _tempo_map.framewalk_to_qn (_origin_b, samples).to_double();
73 } /* namespace ARDOUR */