2 Copyright (C) 2014-2021 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/reel_picture_asset.cc
36 * @brief ReelPictureAsset class
40 #include "compose.hpp"
41 #include "dcp_assert.h"
42 #include "picture_asset.h"
43 #include "raw_convert.h"
44 #include "reel_picture_asset.h"
46 #include <libcxml/cxml.h>
47 LIBDCP_DISABLE_WARNINGS
48 #include <libxml++/libxml++.h>
49 LIBDCP_ENABLE_WARNINGS
56 using std::shared_ptr;
57 using std::dynamic_pointer_cast;
58 using boost::optional;
62 ReelPictureAsset::ReelPictureAsset (shared_ptr<PictureAsset> asset, int64_t entry_point)
63 : ReelFileAsset (asset, asset->key_id(), asset->id(), asset->edit_rate(), asset->intrinsic_duration(), entry_point)
64 , _frame_rate (asset->frame_rate ())
65 , _screen_aspect_ratio (asset->screen_aspect_ratio ())
71 ReelPictureAsset::ReelPictureAsset (shared_ptr<const cxml::Node> node)
72 : ReelFileAsset (node)
74 _frame_rate = Fraction (node->string_child ("FrameRate"));
76 _screen_aspect_ratio = Fraction (node->string_child ("ScreenAspectRatio"));
77 } catch (XMLError& e) {
78 /* It's not a fraction */
80 float f = node->number_child<float> ("ScreenAspectRatio");
81 _screen_aspect_ratio = Fraction (f * 1000, 1000);
82 } catch (bad_cast& e) {
90 ReelPictureAsset::write_to_cpl (xmlpp::Node* node, Standard standard) const
92 auto asset = ReelFileAsset::write_to_cpl (node, standard);
94 asset->add_child("FrameRate")->add_child_text(String::compose("%1 %2", _frame_rate.numerator, _frame_rate.denominator));
96 if (standard == Standard::INTEROP) {
98 /* Allowed values for this tag from the standard */
99 float allowed[] = { 1.33, 1.66, 1.77, 1.85, 2.00, 2.39 };
100 int const num_allowed = sizeof(allowed) / sizeof(float);
103 float ratio = float (_screen_aspect_ratio.numerator) / _screen_aspect_ratio.denominator;
105 /* Pick the closest and use that */
106 optional<float> closest;
107 optional<float> error;
108 for (int i = 0; i < num_allowed; ++i) {
109 float const e = fabsf (allowed[i] - ratio);
110 if (!closest || e < error.get()) {
111 closest = allowed[i];
116 asset->add_child("ScreenAspectRatio")->add_child_text(raw_convert<string>(closest.get(), 2, true));
118 asset->add_child("ScreenAspectRatio")->add_child_text(
119 String::compose ("%1 %2", _screen_aspect_ratio.numerator, _screen_aspect_ratio.denominator)
128 ReelPictureAsset::equals (shared_ptr<const ReelPictureAsset> other, EqualityOptions opt, NoteHandler note) const
130 if (!asset_equals (other, opt, note)) {
133 if (!file_asset_equals (other, opt, note)) {
137 auto rpa = dynamic_pointer_cast<const ReelPictureAsset>(other);
142 if (_frame_rate != rpa->_frame_rate) {
143 note (NoteType::ERROR, "frame rates differ in reel");
147 if (_screen_aspect_ratio != rpa->_screen_aspect_ratio) {
148 note (NoteType::ERROR, "screen aspect ratios differ in reel");