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/*
Copyright (C) 2012-2016 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 "image_content.h"
#include "image_decoder.h"
#include "video_decoder.h"
#include "image.h"
#include "ffmpeg_image_proxy.h"
#include "j2k_image_proxy.h"
#include "film.h"
#include "exceptions.h"
#include "video_content.h"
#include <boost/filesystem.hpp>
#include <iostream>
#include "i18n.h"
using std::cout;
using boost::shared_ptr;
using dcp::Size;
using namespace dcpomatic;
ImageDecoder::ImageDecoder (shared_ptr<const Film> film, shared_ptr<const ImageContent> c)
: Decoder (film)
, _image_content (c)
, _frame_video_position (0)
{
video.reset (new VideoDecoder (this, c));
}
bool
ImageDecoder::pass ()
{
if (_frame_video_position >= _image_content->video->length()) {
return true;
}
if (!_image_content->still() || !_image) {
/* Either we need an image or we are using moving images, so load one */
boost::filesystem::path path = _image_content->path (_image_content->still() ? 0 : _frame_video_position);
if (valid_j2k_file (path)) {
AVPixelFormat pf;
if (_image_content->video->colour_conversion()) {
/* We have a specified colour conversion: assume the image is RGB */
pf = AV_PIX_FMT_RGB48LE;
} else {
/* No specified colour conversion: assume the image is XYZ */
pf = AV_PIX_FMT_XYZ12LE;
}
/* We can't extract image size from a JPEG2000 codestream without decoding it,
so pass in the image content's size here.
*/
_image.reset (new J2KImageProxy (path, _image_content->video->size(), pf));
} else {
_image.reset (new FFmpegImageProxy (path));
}
}
video->emit (film(), _image, _frame_video_position);
++_frame_video_position;
return false;
}
void
ImageDecoder::seek (ContentTime time, bool accurate)
{
Decoder::seek (time, accurate);
_frame_video_position = time.frames_round (_image_content->active_video_frame_rate(film()));
}
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