libsub
sub_time.h
1 /*
2  Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
3 
4  This program is free software; you can redistribute it and/or modify
5  it under the terms of the GNU General Public License as published by
6  the Free Software Foundation; either version 2 of the License, or
7  (at your option) any later version.
8 
9  This program is distributed in the hope that it will be useful,
10  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  GNU General Public License for more details.
13 
14  You should have received a copy of the GNU General Public License
15  along with this program; if not, write to the Free Software
16  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 
18 */
19 
20 #ifndef LIBSUB_SUB_TIME_H
21 #define LIBSUB_SUB_TIME_H
22 
23 #include "rational.h"
24 #include <boost/optional.hpp>
25 
26 namespace sub {
27 
28 class Time
29 {
30 public:
31  Time ()
32  : _seconds (0)
33  , _frames (0)
34  {}
35 
36  int hours () const;
37  int minutes () const;
38  int seconds () const;
39 
40  int frames_at (Rational rate) const;
41  int milliseconds () const;
42 
43  double all_as_seconds () const;
44 
45  void add (Time t);
46  void scale (float f);
47 
48  static Time from_hmsf (int h, int m, int s, int f, boost::optional<Rational> rate = boost::optional<Rational> ());
49  static Time from_hms (int h, int m, int s, int ms);
50  static Time from_frames (int frames, Rational rate);
51 
52 private:
53  friend bool operator< (Time const & a, Time const & b);
54  friend bool operator> (Time const & a, Time const & b);
55  friend bool operator== (Time const & a, Time const & b);
56  friend std::ostream& operator<< (std::ostream& s, Time const & t);
57 
58  Time (int seconds, int frames, boost::optional<Rational> rate)
59  : _seconds (seconds)
60  , _frames (frames)
61  , _rate (rate)
62  {}
63 
64  int _seconds;
65  int _frames;
66  boost::optional<Rational> _rate;
67 };
68 
69 bool operator< (Time const & a, Time const & b);
70 bool operator> (Time const & a, Time const & b);
71 bool operator== (Time const & a, Time const & b);
72 bool operator!= (Time const & a, Time const & b);
73 std::ostream& operator<< (std::ostream& s, Time const & t);
74 
75 }
76 
77 #endif
Definition: rational.h:23
Definition: sub_time.h:29
void add(Time t)
Definition: sub_time.cc:177
static Time from_frames(int frames, Rational rate)
Definition: sub_time.cc:162