RAUL  0.8.0
Quantizer.hpp
1 /* This file is part of Raul.
2  * Copyright (C) 2007-2009 David Robillard <http://drobilla.net>
3  *
4  * Raul is free software; you can redistribute it and/or modify it under the
5  * terms of the GNU General Public License as published by the Free Software
6  * Foundation; either version 2 of the License, or (at your option) any later
7  * version.
8  *
9  * Raul is distributed in the hope that it will be useful, but WITHOUT ANY
10  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
12  *
13  * You should have received a copy of the GNU General Public License along
14  * with this program; if not, write to the Free Software Foundation, Inc.,
15  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
16  */
17 
18 #ifndef RAUL_QUANTIZER_HPP
19 #define RAUL_QUANTIZER_HPP
20 
21 #include <cmath>
22 #include "raul/TimeStamp.hpp"
23 
24 namespace Raul {
25 
29 class Quantizer {
30 public:
31  inline static TimeStamp quantize(TimeStamp q, TimeStamp t) {
32  assert(q.unit() == t.unit());
33  // FIXME: Precision problem? Should probably stay in discrete domain
34  const double qd = q.to_double();
35  const double td = t.to_double();
36  return TimeStamp(t.unit(), (qd > 0) ? lrint(td / qd) * qd : td);
37  }
38 
39  inline static double quantize(double q, double t) {
40  return (q > 0)
41  ? lrint(t / q) * q
42  : t;
43  }
44 };
45 
46 
47 } // namespace Raul
48 
49 #endif // RAUL_QUANTIZER_HPP