2 Copyright (C) 2012-2013 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <boost/filesystem.hpp>
23 #include "image_content.h"
24 #include "image_decoder.h"
26 #include "magick_image_proxy.h"
27 #include "j2k_image_proxy.h"
29 #include "exceptions.h"
34 using boost::shared_ptr;
37 ImageDecoder::ImageDecoder (shared_ptr<const ImageContent> c)
48 if (_video_position >= _image_content->video_length()) {
52 if (!_image_content->still() || !_image) {
53 /* Either we need an image or we are using moving images, so load one */
54 boost::filesystem::path path = _image_content->path (_image_content->still() ? 0 : _video_position);
55 if (valid_j2k_file (path)) {
56 /* We can't extract image size from a JPEG2000 codestream without decoding it,
57 so pass in the image content's size here.
59 _image.reset (new J2KImageProxy (path, _image_content->video_size ()));
61 _image.reset (new MagickImageProxy (path));
65 video (_image, _video_position);
71 ImageDecoder::seek (ContentTime time, bool accurate)
73 VideoDecoder::seek (time, accurate);
74 _video_position = time.frames_round (_image_content->video_frame_rate ());