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
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35 /** @file src/interop_subtitle_asset.cc
36 * @brief InteropSubtitleAsset class
40 #include "compose.hpp"
41 #include "dcp_assert.h"
42 #include "font_asset.h"
43 #include "interop_load_font_node.h"
44 #include "interop_subtitle_asset.h"
45 #include "raw_convert.h"
46 #include "subtitle_asset_internal.h"
47 #include "subtitle_image.h"
51 LIBDCP_DISABLE_WARNINGS
52 #include <libxml++/libxml++.h>
53 LIBDCP_ENABLE_WARNINGS
54 #include <boost/weak_ptr.hpp>
64 using std::shared_ptr;
65 using std::dynamic_pointer_cast;
67 using std::make_shared;
68 using boost::shared_array;
69 using boost::optional;
73 InteropSubtitleAsset::InteropSubtitleAsset (boost::filesystem::path file)
74 : SubtitleAsset (file)
76 _raw_xml = dcp::file_to_string (file);
78 auto xml = make_shared<cxml::Document>("DCSubtitle");
79 xml->read_file (file);
80 _id = xml->string_child ("SubtitleID");
81 _reel_number = xml->string_child ("ReelNumber");
82 _language = xml->string_child ("Language");
83 _movie_title = xml->string_child ("MovieTitle");
84 _load_font_nodes = type_children<InteropLoadFontNode> (xml, "LoadFont");
86 /* Now we need to drop down to xmlpp */
88 vector<ParseState> ps;
89 for (auto i: xml->node()->get_children()) {
90 auto e = dynamic_cast<xmlpp::Element const *>(i);
91 if (e && (e->get_name() == "Font" || e->get_name() == "Subtitle")) {
92 parse_subtitles (e, ps, optional<int>(), Standard::INTEROP);
96 for (auto i: _subtitles) {
97 auto si = dynamic_pointer_cast<SubtitleImage>(i);
99 si->read_png_file (file.parent_path() / String::compose("%1.png", si->id()));
105 InteropSubtitleAsset::InteropSubtitleAsset ()
112 InteropSubtitleAsset::xml_as_string () const
115 auto root = doc.create_root_node ("DCSubtitle");
116 root->set_attribute ("Version", "1.0");
118 root->add_child("SubtitleID")->add_child_text (_id);
119 root->add_child("MovieTitle")->add_child_text (_movie_title);
120 root->add_child("ReelNumber")->add_child_text (raw_convert<string> (_reel_number));
121 root->add_child("Language")->add_child_text (_language);
123 for (auto i: _load_font_nodes) {
124 xmlpp::Element* load_font = root->add_child("LoadFont");
125 load_font->set_attribute ("Id", i->id);
126 load_font->set_attribute ("URI", i->uri);
129 subtitles_as_xml (root, 250, Standard::INTEROP);
131 return doc.write_to_string ("UTF-8");
136 InteropSubtitleAsset::add_font (string load_id, dcp::ArrayData data)
138 _fonts.push_back (Font(load_id, make_uuid(), data));
139 auto const uri = String::compose("font_%1.ttf", _load_font_nodes.size());
140 _load_font_nodes.push_back (shared_ptr<InteropLoadFontNode>(new InteropLoadFontNode(load_id, uri)));
145 InteropSubtitleAsset::equals (shared_ptr<const Asset> other_asset, EqualityOptions options, NoteHandler note) const
147 if (!SubtitleAsset::equals (other_asset, options, note)) {
151 auto other = dynamic_pointer_cast<const InteropSubtitleAsset> (other_asset);
156 if (!options.load_font_nodes_can_differ) {
157 auto i = _load_font_nodes.begin();
158 auto j = other->_load_font_nodes.begin();
160 while (i != _load_font_nodes.end ()) {
161 if (j == other->_load_font_nodes.end ()) {
162 note (NoteType::ERROR, "<LoadFont> nodes differ");
167 note (NoteType::ERROR, "<LoadFont> nodes differ");
176 if (_movie_title != other->_movie_title) {
177 note (NoteType::ERROR, "Subtitle movie titles differ");
185 vector<shared_ptr<LoadFontNode>>
186 InteropSubtitleAsset::load_font_nodes () const
188 vector<shared_ptr<LoadFontNode>> lf;
189 copy (_load_font_nodes.begin(), _load_font_nodes.end(), back_inserter (lf));
195 InteropSubtitleAsset::write (boost::filesystem::path p) const
197 auto f = fopen_boost (p, "w");
199 throw FileError ("Could not open file for writing", p, -1);
202 auto const s = xml_as_string ();
203 /* length() here gives bytes not characters */
204 fwrite (s.c_str(), 1, s.length(), f);
209 /* Image subtitles */
210 for (auto i: _subtitles) {
211 auto im = dynamic_pointer_cast<dcp::SubtitleImage> (i);
213 im->write_png_file(p.parent_path() / String::compose("%1.png", im->id()));
218 for (auto i: _load_font_nodes) {
219 auto file = p.parent_path() / i->uri;
220 auto j = _fonts.begin();
221 while (j != _fonts.end() && j->load_id != i->id) {
224 if (j != _fonts.end ()) {
225 j->data.write (file);
232 /** Look at a supplied list of assets and find the fonts. Then match these
233 * fonts up with anything requested by a <LoadFont> so that _fonts contains
234 * a list of font ID, load ID and data.
237 InteropSubtitleAsset::resolve_fonts (vector<shared_ptr<Asset>> assets)
239 for (auto i: assets) {
240 auto font = dynamic_pointer_cast<FontAsset> (i);
245 for (auto j: _load_font_nodes) {
247 for (auto const& k: _fonts) {
248 if (k.load_id == j->id) {
254 if (!got && font->file() && j->uri == font->file()->leaf().string()) {
255 _fonts.push_back (Font (j->id, i->id(), font->file().get()));
263 InteropSubtitleAsset::add_font_assets (vector<shared_ptr<Asset>>& assets)
265 for (auto const& i: _fonts) {
267 assets.push_back (make_shared<FontAsset>(i.uuid, i.file.get()));
273 InteropSubtitleAsset::write_to_assetmap (xmlpp::Node* node, boost::filesystem::path root) const
275 Asset::write_to_assetmap (node, root);
277 for (auto i: _subtitles) {
278 auto im = dynamic_pointer_cast<dcp::SubtitleImage> (i);
280 DCP_ASSERT (im->file());
281 write_file_to_assetmap (node, root, im->file().get(), im->id());
288 InteropSubtitleAsset::add_to_pkl (shared_ptr<PKL> pkl, boost::filesystem::path root) const
290 Asset::add_to_pkl (pkl, root);
292 for (auto i: _subtitles) {
293 auto im = dynamic_pointer_cast<dcp::SubtitleImage> (i);
295 auto png_image = im->png_image ();
296 pkl->add_asset (im->id(), optional<string>(), make_digest(png_image), png_image.size(), "image/png");
303 InteropSubtitleAsset::set_font_file (string load_id, boost::filesystem::path file)
305 for (auto& i: _fonts) {
306 if (i.load_id == load_id) {
311 for (auto i: _load_font_nodes) {
312 if (i->id == load_id) {
313 i->uri = file.filename().string();