2 Copyright (C) 2012-2015 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
24 #include "raw_convert.h"
26 #include "exceptions.h"
27 #include <boost/algorithm/string.hpp>
33 using namespace boost;
36 Time::Time (int frame, int frames_per_second, int tcr_)
43 set (double (frame) / frames_per_second, tcr);
46 Time::Time (double seconds)
52 Time::set (double seconds, int tcr_)
57 e = int (round ((seconds - s) * tcr));
70 Time::Time (string time, int tcr_)
74 split (b, time, is_any_of (":"));
76 boost::throw_exception (DCPReadError ("unrecognised time specification"));
79 h = raw_convert<int> (b[0]);
80 m = raw_convert<int> (b[1]);
81 s = raw_convert<int> (b[2]);
82 e = raw_convert<int> (b[3]);
86 dcp::operator== (Time const & a, Time const & b)
88 return (a.h == b.h && a.m == b.m && a.s == b.s && (a.e * b.tcr) == (b.e * a.tcr));
92 dcp::operator!= (Time const & a, Time const & b)
98 dcp::operator<= (Time const & a, Time const & b)
100 return a < b || a == b;
104 dcp::operator>= (Time const & a, Time const & b)
106 return a > b || a == b;
110 dcp::operator< (Time const & a, Time const & b)
124 if ((a.e * b.tcr) != (b.e * a.tcr)) {
125 return (a.e * b.tcr) < (b.e * a.tcr);
132 dcp::operator> (Time const & a, Time const & b)
146 if ((a.e * b.tcr) != (b.e * a.tcr)) {
147 return (a.e * b.tcr) > (b.e * a.tcr);
154 dcp::operator<< (ostream& s, Time const & t)
156 s << t.h << ":" << t.m << ":" << t.s << "." << t.e;
161 dcp::operator+ (Time a, Time b)
165 /* Make sure we have a common tcr */
166 if (a.tcr != b.tcr) {
169 r.tcr = a.tcr * b.tcr;
198 dcp::operator- (Time a, Time b)
202 /* Make sure we have a common tcr */
203 if (a.tcr != b.tcr) {
206 r.tcr = a.tcr * b.tcr;
235 dcp::operator/ (Time a, Time const & b)
237 int64_t const at = a.h * 3600 + a.m * 60 + a.s * float (a.e) / a.tcr;
238 int64_t const bt = b.h * 3600 + b.m * 60 + b.s * float (b.e) / b.tcr;
239 return float (at) / bt;
242 /** @return A string of the form h:m:s:e */
244 Time::to_string () const
247 str << h << ":" << m << ":" << s << ":" << e;
252 Time::to_editable_units (int tcr_) const
254 return (int64_t(e) * float (tcr_ / tcr)) + int64_t(s) * tcr_ + int64_t(m) * 60 * tcr_ + int64_t(h) * 60 * 60 * tcr_;
258 Time::to_seconds () const
260 return h * 3600 + m * 60 + s + double(e) / tcr;