2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
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.
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.
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.
20 /** @file src/dcp_time.cc
21 * @brief A representation of time within a DCP.
26 #include <boost/algorithm/string.hpp>
27 #include <boost/lexical_cast.hpp>
30 #include "exceptions.h"
33 using namespace boost;
36 Time::Time (int frame, int frames_per_second)
42 set (double (frame) / frames_per_second);
45 Time::Time (int64_t ticks)
47 h = ticks / (60 * 60 * 250);
48 ticks -= int64_t (h) * 60 * 60 * 250;
49 m = ticks / (60 * 250);
50 ticks -= int64_t (m) * 60 * 250;
52 ticks -= int64_t (s) * 250;
59 t = (int (round (ss * 1000)) % 1000) / 4;
73 Time::Time (string time)
76 split (b, time, is_any_of (":"));
78 boost::throw_exception (DCPReadError ("unrecognised time specification"));
81 h = lexical_cast<int> (b[0]);
82 m = lexical_cast<int> (b[1]);
83 s = lexical_cast<int> (b[2]);
84 t = lexical_cast<int> (b[3]);
88 dcp::operator== (Time const & a, Time const & b)
90 return (a.h == b.h && a.m == b.m && a.s == b.s && a.t == b.t);
94 dcp::operator!= (Time const & a, Time const & b)
100 dcp::operator<= (Time const & a, Time const & b)
122 dcp::operator< (Time const & a, Time const & b)
144 dcp::operator> (Time const & a, Time const & b)
166 dcp::operator<< (ostream& s, Time const & t)
168 s << t.h << ":" << t.m << ":" << t.s << "." << t.t;
173 dcp::operator+ (Time a, Time const & b)
201 dcp::operator- (Time a, Time const & b)
229 dcp::operator/ (Time a, Time const & b)
231 int64_t const at = a.h * 3600 * 250 + a.m * 60 * 250 + a.s * 250 + a.t;
232 int64_t const bt = b.h * 3600 * 250 + b.m * 60 * 250 + b.s * 250 + b.t;
233 return float (at) / bt;
236 /** @return A string of the form h:m:s:t */
238 Time::to_string () const
241 str << h << ":" << m << ":" << s << ":" << t;
245 /** @return This time in ticks */
247 Time::to_ticks () const
249 return int64_t(t) + int64_t(s) * 250 + int64_t(m) * 60 * 250 + int64_t(h) * 60 * 60 * 250;