2 Copyright (C) 2014-2016 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.
34 /** @file src/reel_picture_asset.h
35 * @brief ReelPictureAsset class.
38 #include "reel_picture_asset.h"
39 #include "picture_asset.h"
40 #include "dcp_assert.h"
41 #include "raw_convert.h"
42 #include "compose.hpp"
43 #include <libcxml/cxml.h>
44 #include <libxml++/libxml++.h>
50 using boost::shared_ptr;
51 using boost::dynamic_pointer_cast;
52 using boost::optional;
55 ReelPictureAsset::ReelPictureAsset (shared_ptr<PictureAsset> asset, int64_t entry_point)
56 : ReelAsset (asset->id(), asset->edit_rate(), asset->intrinsic_duration(), entry_point)
57 , ReelMXF (asset, asset->key_id())
58 , _frame_rate (asset->frame_rate ())
59 , _screen_aspect_ratio (asset->screen_aspect_ratio ())
64 ReelPictureAsset::ReelPictureAsset (shared_ptr<const cxml::Node> node)
68 _frame_rate = Fraction (node->string_child ("FrameRate"));
70 _screen_aspect_ratio = Fraction (node->string_child ("ScreenAspectRatio"));
71 } catch (XMLError& e) {
72 /* It's not a fraction */
74 float f = node->number_child<float> ("ScreenAspectRatio");
75 _screen_aspect_ratio = Fraction (f * 1000, 1000);
76 } catch (bad_cast& e) {
83 ReelPictureAsset::write_to_cpl (xmlpp::Node* node, Standard standard) const
85 xmlpp::Node* asset = write_to_cpl_base (node, standard, hash());
87 asset->add_child("FrameRate")->add_child_text(String::compose("%1 %2", _frame_rate.numerator, _frame_rate.denominator));
88 if (standard == INTEROP) {
90 /* Allowed values for this tag from the standard */
91 float allowed[] = { 1.33, 1.66, 1.77, 1.85, 2.00, 2.39 };
92 int const num_allowed = sizeof(allowed) / sizeof(float);
95 float ratio = float (_screen_aspect_ratio.numerator) / _screen_aspect_ratio.denominator;
97 /* Pick the closest and use that */
98 optional<float> closest;
99 optional<float> error;
100 for (int i = 0; i < num_allowed; ++i) {
101 float const e = fabsf (allowed[i] - ratio);
102 if (!closest || e < error.get()) {
103 closest = allowed[i];
108 asset->add_child ("ScreenAspectRatio")->add_child_text (raw_convert<string> (closest.get(), 2, true));
110 asset->add_child ("ScreenAspectRatio")->add_child_text (
111 String::compose ("%1 %2", _screen_aspect_ratio.numerator, _screen_aspect_ratio.denominator)
117 xmlpp::Node* hash = find_child (asset, "Hash");
118 asset->add_child_before(hash, "KeyId")->add_child_text("urn:uuid:" + key_id().get());
125 ReelPictureAsset::key_type () const
131 ReelPictureAsset::equals (shared_ptr<const ReelPictureAsset> other, EqualityOptions opt, NoteHandler note) const
133 if (!asset_equals (other, opt, note)) {
136 if (!mxf_equals (other, opt, note)) {
140 shared_ptr<const ReelPictureAsset> rpa = dynamic_pointer_cast<const ReelPictureAsset> (other);
145 if (_frame_rate != rpa->_frame_rate) {
146 note (DCP_ERROR, "frame rates differ in reel");
150 if (_screen_aspect_ratio != rpa->_screen_aspect_ratio) {
151 note (DCP_ERROR, "screen aspect ratios differ in reel");