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/*
Copyright (C) 2019 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 "video_view.h"
#include "wx_util.h"
#include "film_viewer.h"
#include "lib/butler.h"
void
VideoView::clear ()
{
boost::mutex::scoped_lock lm (_mutex);
_player_video.first.reset ();
_player_video.second = dcpomatic::DCPTime ();
}
/** @param non_blocking true to return false quickly if no video is available quickly.
* @return false if we gave up because it would take too long, otherwise true.
*/
bool
VideoView::get_next_frame (bool non_blocking)
{
if (_length == dcpomatic::DCPTime()) {
return true;
}
DCPOMATIC_ASSERT (_viewer->butler());
_viewer->_gets++;
boost::mutex::scoped_lock lm (_mutex);
do {
Butler::Error e;
_player_video = _viewer->butler()->get_video (!non_blocking, &e);
if (!_player_video.first && e == Butler::AGAIN) {
return false;
}
} while (
_player_video.first &&
_viewer->film()->three_d() &&
_viewer->_eyes != _player_video.first->eyes() &&
_player_video.first->eyes() != EYES_BOTH
);
return true;
}
dcpomatic::DCPTime
VideoView::one_video_frame () const
{
return dcpomatic::DCPTime::from_frames (1, video_frame_rate());
}
/** @return Time in ms until the next frame is due */
int
VideoView::time_until_next_frame () const
{
if (length() == dcpomatic::DCPTime()) {
/* There's no content, so this doesn't matter */
return 0;
}
dcpomatic::DCPTime const next = position() + one_video_frame();
dcpomatic::DCPTime const time = _viewer->audio_time().get_value_or(position());
if (next < time) {
return 0;
}
return (next.seconds() - time.seconds()) * 1000;
}
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