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/*
Copyright (C) 2014 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.
*/
#include "frame_time.h"
#include "compose.hpp"
#include <iostream>
using std::ostream;
using std::string;
using namespace sub;
bool
sub::operator== (FrameTime const & a, FrameTime const & b)
{
return a.hours() == b.hours() && a.minutes() == b.minutes() && a.seconds() == b.seconds() && a.frames() == b.frames();
}
bool
sub::operator< (FrameTime const & a, FrameTime const & b)
{
if (a.hours() != b.hours()) {
return a.hours() < b.hours();
}
if (a.minutes() != b.minutes()) {
return a.minutes() < b.minutes();
}
if (a.seconds() != b.seconds()) {
return a.seconds() < b.seconds();
}
return a.frames() < b.frames();
}
ostream&
sub::operator<< (ostream& s, FrameTime const & t)
{
s << t.hours() << ":" << t.minutes() << ":" << t.seconds() << ":" << t.frames();
return s;
}
string
FrameTime::timecode () const
{
return String::compose ("%1:%2:%3:%4", _hours, _minutes, _seconds, _frames);
}
FrameTime::FrameTime (int64_t f, float fps)
{
set_from_frames (f, fps);
}
void
FrameTime::set_from_frames (int64_t f, float fps)
{
_hours = f / (60 * 60 * fps);
f -= _hours * 60 * 60 * fps;
_minutes = f / (60 * fps);
f -= _minutes * 60 * fps;
_seconds = f / fps;
f -= _seconds * fps;
_frames = int (f);
}
void
FrameTime::add (FrameTime t, float fps)
{
_frames += t.frames ();
if (_frames > fps) {
_frames -= fps;
_seconds++;
}
_seconds += t.seconds ();
if (_seconds >= 60) {
_seconds -= 60;
++_minutes;
}
_minutes += t.minutes ();
if (_minutes >= 60) {
_minutes -= 60;
++_hours;
}
_hours += t.hours ();
}
void
FrameTime::scale (float f, float frames_per_second)
{
set_from_frames (
(((_hours * 3600 + _minutes * 60 + _seconds) * frames_per_second) + _frames) * f,
frames_per_second
);
}
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