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/*
Copyright (C) 2016-2021 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 "video_mxf_decoder.h"
#include "video_decoder.h"
#include "video_mxf_content.h"
#include "j2k_image_proxy.h"
#include "frame_interval_checker.h"
#include <dcp/mono_j2k_picture_asset.h>
#include <dcp/mono_j2k_picture_asset_reader.h>
#include <dcp/stereo_j2k_picture_asset.h>
#include <dcp/stereo_j2k_picture_asset_reader.h>
#include <dcp/exceptions.h>
using std::make_shared;
using std::shared_ptr;
using boost::optional;
using namespace dcpomatic;
VideoMXFDecoder::VideoMXFDecoder (shared_ptr<const Film> film, shared_ptr<const VideoMXFContent> content)
: Decoder (film)
, _content (content)
{
video = make_shared<VideoDecoder>(this, content);
try {
auto mono = make_shared<dcp::MonoJ2KPictureAsset>(_content->path(0));
_mono_reader = mono->start_read ();
_mono_reader->set_check_hmac (false);
_size = mono->size ();
return;
} catch (dcp::MXFFileError& e) {
/* maybe it's stereo */
} catch (dcp::ReadError& e) {
/* maybe it's stereo */
}
auto stereo = make_shared<dcp::StereoJ2KPictureAsset>(_content->path(0));
_stereo_reader = stereo->start_read ();
_stereo_reader->set_check_hmac (false);
_size = stereo->size ();
}
bool
VideoMXFDecoder::pass ()
{
auto const vfr = _content->active_video_frame_rate (film());
auto const frame = _next.frames_round (vfr);
if (frame >= _content->video->length()) {
return true;
}
if (_mono_reader) {
video->emit (
film(),
std::make_shared<J2KImageProxy>(_mono_reader->get_frame(frame), _size, AV_PIX_FMT_XYZ12LE, optional<int>()),
_next
);
} else {
video->emit (
film(),
std::make_shared<J2KImageProxy>(_stereo_reader->get_frame(frame), _size, dcp::Eye::LEFT, AV_PIX_FMT_XYZ12LE, optional<int>()),
_next
);
video->emit (
film(),
std::make_shared<J2KImageProxy>(_stereo_reader->get_frame(frame), _size, dcp::Eye::RIGHT, AV_PIX_FMT_XYZ12LE, optional<int>()),
_next
);
}
_next += ContentTime::from_frames (1, vfr);
return false;
}
void
VideoMXFDecoder::seek (ContentTime t, bool accurate)
{
Decoder::seek (t, accurate);
_next = t;
}
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