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/*
Copyright (C) 2020-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "dcpomatic_time.h"
#include <boost/optional.hpp>
#include <vector>
class FrameIntervalChecker
{
public:
FrameIntervalChecker () {}
FrameIntervalChecker (FrameIntervalChecker const &) = delete;
FrameIntervalChecker& operator= (FrameIntervalChecker const &) = delete;
void feed (dcpomatic::ContentTime time, double frame_rate);
enum Guess
{
AGAIN,
PROBABLY_3D,
PROBABLY_NOT_3D
};
Guess guess () const;
private:
boost::optional<dcpomatic::ContentTime> _last;
/** Intervals of last frames, in fractions of a frame; i.e. 1 in here
* means the last two frames were one frame interval apart according
* to the frame rate passed to ::feed().
*/
std::vector<double> _intervals;
static int const _frames;
};
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