Simplify time representation; better in-tree DCP subtitle parser.

1 files changed, 86 insertions, 0 deletions

diff --git a/src/sub_time.h b/src/sub_time.h
new file mode 100644
index 0000000..7e1d193
--- /dev/null
+++ b/src/sub_time.h
@@ -0,0 +1,86 @@
+/*
+    Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
+
+    This program 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,
+    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.
+
+*/
+
+#ifndef LIBSUB_SUB_TIME_H
+#define LIBSUB_SUB_TIME_H
+
+#include <boost/optional.hpp>
+
+namespace sub {
+	
+class Rational
+{
+public:
+	Rational (int numerator_, int denominator_)
+		: numerator (numerator_)
+		, denominator (denominator_)
+	{}
+	
+	int numerator;
+	int denominator;
+
+	double fraction () const {
+		return double (numerator) / denominator;
+	}
+};
+
+class Time
+{
+public:
+	Time ()
+		: _seconds (0)
+		, _frames (0)
+	{}
+
+	int hours () const;
+	int minutes () const;
+	int seconds () const;
+
+	int frames_at (Rational rate) const;
+	int milliseconds () const;
+
+	static Time from_hmsf (int h, int m, int s, int f, boost::optional<Rational> rate = boost::optional<Rational> ());
+	static Time from_hms (int h, int m, int s, int ms);
+	
+private:
+	friend bool operator< (Time const & a, Time const & b);
+	friend bool operator> (Time const & a, Time const & b);
+	friend bool operator== (Time const & a, Time const & b);
+	friend std::ostream& operator<< (std::ostream& s, Time const & t);
+
+	Time (int seconds, int frames, boost::optional<Rational> rate)
+		: _seconds (seconds)
+		, _frames (frames)
+		, _rate (rate)
+	{}
+	
+	int _seconds;
+	int _frames;
+	boost::optional<Rational> _rate;
+};
+
+bool operator< (Time const & a, Time const & b);
+bool operator> (Time const & a, Time const & b);
+bool operator== (Time const & a, Time const & b);
+bool operator!= (Time const & a, Time const & b);
+std::ostream& operator<< (std::ostream& s, Time const & t);
+	
+}
+
+#endif