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;
34 using namespace libdcp;
36 Time::Time (int frame, int frames_per_second)
42 float sec_float = float (frame) / frames_per_second;
43 t = (int (floor (sec_float * 1000)) % 1000) / 4;
44 s = floor (sec_float);
57 Time::Time (string time)
60 split (b, time, is_any_of (":"));
62 boost::throw_exception (DCPReadError ("unrecognised time specification"));
65 h = lexical_cast<int> (b[0]);
66 m = lexical_cast<int> (b[1]);
67 s = lexical_cast<int> (b[2]);
68 t = lexical_cast<int> (b[3]);
72 libdcp::operator== (Time const & a, Time const & b)
74 return (a.h == b.h && a.m == b.m && a.s == b.s && a.t == b.t);
78 libdcp::operator!= (Time const & a, Time const & b)
84 libdcp::operator<= (Time const & a, Time const & b)
106 libdcp::operator< (Time const & a, Time const & b)
128 libdcp::operator> (Time const & a, Time const & b)
150 libdcp::operator<< (ostream& s, Time const & t)
152 s << t.h << ":" << t.m << ":" << t.s << "." << t.t;
157 libdcp::operator+ (Time a, Time const & b)
185 libdcp::operator- (Time a, Time const & b)
213 libdcp::operator/ (Time a, Time const & b)
215 int64_t const at = a.h * 3600 * 250 + a.m * 60 * 250 + a.s * 250 + a.t;
216 int64_t const bt = b.h * 3600 * 250 + b.m * 60 * 250 + b.s * 250 + b.t;
217 return float (at) / bt;
220 /** @return A string of the form h:m:s:t */
222 Time::to_string () const
225 str << h << ":" << m << ":" << s << ":" << t;
229 /** @return This time in ticks */
231 Time::to_ticks () const
233 return t + s * 25 + m * 60 * 25 + h * 60 * 60 * 25;