/*
- Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ This file is part of libdcp.
+
+ libdcp is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
- This program is distributed in the hope that it will be useful,
+ libdcp is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
+ along with libdcp. If not, see <http://www.gnu.org/licenses/>.
+
+ In addition, as a special exception, the copyright holders give
+ permission to link the code of portions of this program with the
+ OpenSSL library under certain conditions as described in each
+ individual source file, and distribute linked combinations
+ including the two.
+
+ You must obey the GNU General Public License in all respects
+ for all of the code used other than OpenSSL. If you modify
+ file(s) with this exception, you may extend this exception to your
+ version of the file(s), but you are not obligated to do so. If you
+ do not wish to do so, delete this exception statement from your
+ version. If you delete this exception statement from all source
+ files in the program, then also delete it here.
*/
+
/** @file src/dcp_time.h
- * @brief Time class.
+ * @brief Time class
*/
+
#ifndef LIBDCP_TIME_H
#define LIBDCP_TIME_H
+
+#include "types.h"
+#include <boost/optional.hpp>
#include <stdint.h>
#include <string>
#include <iostream>
+
namespace dcp {
+
+class Time;
+
+
+extern bool operator== (Time const & a, Time const & b);
+extern bool operator!= (Time const & a, Time const & b);
+extern bool operator<= (Time const & a, Time const & b);
+extern bool operator< (Time const & a, Time const & b);
+extern bool operator> (Time const & a, Time const & b);
+extern bool operator>= (Time const & a, Time const & b);
+extern std::ostream & operator<< (std::ostream & s, Time const & t);
+extern Time operator+ (Time a, Time b);
+extern Time operator- (Time a, Time b);
+extern float operator/ (Time a, Time const & b);
+
+
/** @class Time
* @brief A representation of time within a DCP.
*/
-
class Time
{
public:
- Time () : h (0), m (0), s (0), t (0) {}
+ /** Construct a zero Time */
+ Time () {}
- Time (int64_t ticks);
-
- /** Construct a Time from a frame index (starting from 0)
- * and a frames per second count.
+ /** Construct a Time.
+ * @param frame Frame index (starting from 0).
+ * @param frames_per_second Frames per second.
+ * @param tcr Timecode rate.
*/
- Time (int frame, int frames_per_second);
+ Time (int frame, double frames_per_second, int tcr);
- /** Construct a Time from hours, minutes, seconds and ticks.
+ /** Construct a Time from hours, minutes, seconds, editable units and a timecode rate.
* @param h_ Hours.
* @param m_ Minutes.
* @param s_ Seconds.
- * @param t_ Ticks (where 1 tick is 4 milliseconds).
+ * @param e_ Editable units (where 1 editable unit is 1 / tcr_ seconds)
+ * @param tcr_ Timecode rate; i.e. number of editable units per second.
*/
- Time (int h_, int m_, int s_, int t_)
+ Time (int h_, int m_, int s_, int e_, int tcr_)
: h (h_)
, m (m_)
, s (s_)
- , t (t_)
+ , e (e_)
+ , tcr (tcr_)
{}
- Time (std::string time);
+ /** Construct a Time from a number of seconds and a timecode rate
+ *
+ * @param seconds A number of seconds
+ * @param tcr_ Timecode rate
+ */
+ Time (double seconds, int tcr);
+
+ /** @param time String of the form
+ * HH:MM:SS:EE for SMPTE
+ * HH:MM:SS:E[E[E]] or HH:MM:SS.s[s[s]] for Interop
+ * where HH are hours, MM minutes, SS seconds, EE editable units and
+ * sss millseconds.
+ *
+ * @param tcr_ Timecode rate if this is a SMPTE time, otherwise empty for an Interop time
+ */
+ Time (std::string time, boost::optional<int> tcr);
+
+ int h = 0; ///< hours
+ int m = 0; ///< minutes
+ int s = 0; ///< seconds
+ int e = 0; ///< editable units (where 1 editable unit is 1 / tcr_ seconds)
+ int tcr = 1; ///< timecode rate: the number of editable units per second.
+
+ /** @return A string of the form h:m:s:e padded as in 00:00:00:000 (for Interop) or 00:00:00:00 (for SMPTE) */
+ std::string as_string (Standard standard) const;
- int h; ///< hours
- int m; ///< minutes
- int s; ///< seconds
- int t; ///< `ticks', where 1 tick is 4 milliseconds
+ /** @return the total number of seconds that this time consists of */
+ double as_seconds () const;
+
+ /** @param tcr_ Timecode rate with which the return value should be counted
+ * @return the total number of editable units that this time consists of at the specified timecode rate, rounded up
+ * to the nearest editable unit. For example, as_editable_units (24) returns the total time in frames at 24fps.
+ */
+ int64_t as_editable_units (int tcr_) const;
+
+ /** @param tcr_ New timecode rate
+ * @return A new Time which is this time at the spcified new timecode rate
+ */
+ Time rebase (int tcr_) const;
- std::string to_string () const;
- int64_t to_ticks () const;
+ Time& operator+= (Time const & o) {
+ *this = *this + o;
+ return *this;
+ }
private:
- void set (double);
+ void set (double seconds, int tcr);
};
-extern bool operator== (Time const & a, Time const & b);
-extern bool operator!= (Time const & a, Time const & b);
-extern bool operator<= (Time const & a, Time const & b);
-extern bool operator< (Time const & a, Time const & b);
-extern bool operator> (Time const & a, Time const & b);
-extern std::ostream & operator<< (std::ostream & s, Time const & t);
-extern Time operator+ (Time a, Time const & b);
-extern Time operator- (Time a, Time const & b);
-extern float operator/ (Time a, Time const & b);
}
+
#endif
projects / libdcp.git / blobdiff