2 Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of libdcp.
6 libdcp 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 libdcp 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 libdcp. If not, see <http://www.gnu.org/licenses/>.
19 In addition, as a special exception, the copyright holders give
20 permission to link the code of portions of this program with the
21 OpenSSL library under certain conditions as described in each
22 individual source file, and distribute linked combinations
25 You must obey the GNU General Public License in all respects
26 for all of the code used other than OpenSSL. If you modify
27 file(s) with this exception, you may extend this exception to your
28 version of the file(s), but you are not obligated to do so. If you
29 do not wish to do so, delete this exception statement from your
30 version. If you delete this exception statement from all source
31 files in the program, then also delete it here.
35 /** @file src/picture_asset.cc
36 * @brief PictureAsset class
40 #include "compose.hpp"
41 #include "dcp_assert.h"
42 #include "equality_options.h"
43 #include "exceptions.h"
44 #include "j2k_transcode.h"
45 #include "openjpeg_image.h"
46 #include "picture_asset.h"
47 #include "picture_asset_writer.h"
49 #include <asdcp/AS_DCP.h>
50 #include <asdcp/KM_fileio.h>
51 #include <libxml++/nodes/element.h>
52 #include <boost/filesystem.hpp>
63 using std::shared_ptr;
67 PictureAsset::PictureAsset (boost::filesystem::path file)
69 , _intrinsic_duration (0)
75 PictureAsset::PictureAsset (Fraction edit_rate, Standard standard)
77 , _edit_rate (edit_rate)
78 , _intrinsic_duration (0)
85 PictureAsset::read_picture_descriptor (ASDCP::JP2K::PictureDescriptor const & desc)
87 _size.width = desc.StoredWidth;
88 _size.height = desc.StoredHeight;
89 _edit_rate = Fraction (desc.EditRate.Numerator, desc.EditRate.Denominator);
90 _intrinsic_duration = desc.ContainerDuration;
91 _frame_rate = Fraction (desc.SampleRate.Numerator, desc.SampleRate.Denominator);
92 _screen_aspect_ratio = Fraction (desc.AspectRatio.Numerator, desc.AspectRatio.Denominator);
97 PictureAsset::descriptor_equals (
98 ASDCP::JP2K::PictureDescriptor const & a, ASDCP::JP2K::PictureDescriptor const & b, NoteHandler note
102 a.EditRate != b.EditRate ||
103 a.SampleRate != b.SampleRate ||
104 a.StoredWidth != b.StoredWidth ||
105 a.StoredHeight != b.StoredHeight ||
106 a.AspectRatio != b.AspectRatio ||
107 a.Rsize != b.Rsize ||
108 a.Xsize != b.Xsize ||
109 a.Ysize != b.Ysize ||
110 a.XOsize != b.XOsize ||
111 a.YOsize != b.YOsize ||
112 a.XTsize != b.XTsize ||
113 a.YTsize != b.YTsize ||
114 a.XTOsize != b.XTOsize ||
115 a.YTOsize != b.YTOsize ||
117 // a.CodingStyleDefault != b.CodingStyleDefault ||
118 // a.QuantizationDefault != b.QuantizationDefault
121 note (NoteType::ERROR, "video MXF picture descriptors differ");
125 if (a.ContainerDuration != b.ContainerDuration) {
126 note (NoteType::ERROR, "video container durations differ");
129 // for (unsigned int j = 0; j < ASDCP::JP2K::MaxComponents; ++j) {
130 // if (a.ImageComponents[j] != b.ImageComponents[j]) {
131 // notes.pack_start ("video MXF picture descriptors differ");
140 PictureAsset::frame_buffer_equals (
141 int frame, EqualityOptions const& opt, NoteHandler note,
142 uint8_t const * data_A, unsigned int size_A, uint8_t const * data_B, unsigned int size_B
145 if (size_A == size_B && memcmp (data_A, data_B, size_A) == 0) {
146 note (NoteType::NOTE, "J2K identical");
147 /* Easy result; the J2K data is identical */
151 /* Decompress the images to bitmaps */
152 auto image_A = decompress_j2k (const_cast<uint8_t*>(data_A), size_A, 0);
153 auto image_B = decompress_j2k (const_cast<uint8_t*>(data_B), size_B, 0);
157 vector<int> abs_diffs (image_A->size().width * image_A->size().height * 3);
161 for (int c = 0; c < 3; ++c) {
163 if (image_A->size() != image_B->size()) {
164 note (NoteType::ERROR, String::compose ("image sizes for frame %1 differ", frame));
168 int const pixels = image_A->size().width * image_A->size().height;
169 for (int j = 0; j < pixels; ++j) {
170 int const t = abs (image_A->data(c)[j] - image_B->data(c)[j]);
172 max_diff = max (max_diff, t);
177 for (vector<int>::iterator j = abs_diffs.begin(); j != abs_diffs.end(); ++j) {
181 double const mean = double (total) / abs_diffs.size ();
183 uint64_t total_squared_deviation = 0;
184 for (auto j: abs_diffs) {
185 total_squared_deviation += pow (j - mean, 2);
188 auto const std_dev = sqrt (double (total_squared_deviation) / abs_diffs.size());
190 note (NoteType::NOTE, String::compose("mean difference %1 deviation %2", mean, std_dev));
192 if (mean > opt.max_mean_pixel_error) {
195 String::compose ("mean %1 out of range %2 in frame %3", mean, opt.max_mean_pixel_error, frame)
201 if (std_dev > opt.max_std_dev_pixel_error) {
204 String::compose ("standard deviation %1 out of range %2 in frame %3", std_dev, opt.max_std_dev_pixel_error, frame)
215 PictureAsset::static_pkl_type (Standard standard)
218 case Standard::INTEROP:
219 return "application/x-smpte-mxf;asdcpKind=Picture";
220 case Standard::SMPTE:
221 return "application/mxf";
229 PictureAsset::pkl_type (Standard standard) const
231 return static_pkl_type (standard);