2 Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
22 #include "compose.hpp"
25 #include "exceptions.h"
26 #include "ffmpeg_image_proxy.h"
29 #include "image_content.h"
30 #include "image_examiner.h"
32 #include <dcp/openjpeg_image.h>
33 #include <dcp/exceptions.h>
34 #include <dcp/j2k_transcode.h>
42 using std::shared_ptr;
44 using boost::optional;
47 ImageExaminer::ImageExaminer (shared_ptr<const Film> film, shared_ptr<const ImageContent> content, shared_ptr<Job>)
49 , _image_content (content)
51 auto path = content->path(0);
52 if (valid_j2k_file (path)) {
53 auto size = boost::filesystem::file_size (path);
54 dcp::File f(path, "rb");
56 throw FileError ("Could not open file for reading", path);
58 std::vector<uint8_t> buffer(size);
59 f.checked_read(buffer.data(), size);
62 _video_size = dcp::decompress_j2k(buffer.data(), size, 0)->size();
63 } catch (dcp::ReadError& e) {
64 throw DecodeError (String::compose (_("Could not decode JPEG2000 file %1 (%2)"), path, e.what ()));
67 FFmpegImageProxy proxy(content->path(0));
68 _video_size = proxy.image(Image::Alignment::COMPACT).image->size();
71 if (content->still ()) {
72 _video_length = Config::instance()->default_still_length() * video_frame_rate().get_value_or (film->video_frame_rate ());
74 _video_length = _image_content->number_of_paths ();
80 ImageExaminer::video_size () const
82 return _video_size.get ();
87 ImageExaminer::video_frame_rate () const
89 if (_image_content->video_frame_rate()) {
90 /* The content already knows what frame rate it should be */
91 return _image_content->video_frame_rate().get();
100 ImageExaminer::yuv () const
102 /* We never convert ImageSource from YUV to RGB (though maybe sometimes we should)
103 so it makes sense to just say they are never YUV so the option of a conversion
104 to RGB is not offered.