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/*
Copyright (C) 2018 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 "shuffler.h"
#include "content_video.h"
#include "dcpomatic_assert.h"
#include <boost/foreach.hpp>
#include <iostream>
using std::make_pair;
using boost::weak_ptr;
using boost::shared_ptr;
using boost::optional;
struct Comparator
{
bool operator()(Shuffler::Store const & a, Shuffler::Store const & b) {
if (a.second.frame != b.second.frame) {
return a.second.frame < b.second.frame;
}
return a.second.eyes < b.second.eyes;
}
};
void
Shuffler::video (weak_ptr<Piece> weak_piece, ContentVideo video)
{
/* We should only ever see 3D_LEFT / 3D_RIGHT */
DCPOMATIC_ASSERT (video.eyes == EYES_LEFT || video.eyes == EYES_RIGHT);
shared_ptr<Piece> piece = weak_piece.lock ();
DCPOMATIC_ASSERT (piece);
if (!_last && video.eyes == EYES_LEFT) {
/* We haven't seen anything since the last clear() and we have some eyes-left so assume everything is OK */
Video (weak_piece, video);
_last = video;
return;
}
_store.push_back (make_pair (weak_piece, video));
_store.sort (Comparator());
bool const store_front_in_sequence =
!_store.empty() &&
_last &&
(
(_store.front().second.frame == _last->frame && _store.front().second.eyes == EYES_RIGHT && _last->eyes == EYES_LEFT) ||
(_store.front().second.frame == (_last->frame + 1) && _store.front().second.eyes == EYES_LEFT && _last->eyes == EYES_RIGHT)
);
/* store_front_in_sequence means everything is ok; otherwise if the store is getting too big just
start emitting things as best we can. This can easily happen if, for example, there is only content
for one eye in some part of the timeline.
*/
while (store_front_in_sequence || _store.size() > 8) {
Video (_store.front().first, _store.front().second);
_last = _store.front().second;
_store.pop_front ();
}
}
void
Shuffler::clear ()
{
_store.clear ();
_last = optional<ContentVideo>();
}
void
Shuffler::flush ()
{
BOOST_FOREACH (Store i, _store) {
Video (i.first, i.second);
}
}
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