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
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31 files in the program, then also delete it here.
35 /** @file src/interop_subtitle_asset.cc
36 * @brief InteropSubtitleAsset class
40 #include "interop_subtitle_asset.h"
41 #include "interop_load_font_node.h"
42 #include "subtitle_asset_internal.h"
44 #include "raw_convert.h"
46 #include "font_asset.h"
47 #include "dcp_assert.h"
48 #include "compose.hpp"
49 #include "subtitle_image.h"
50 #include <libxml++/libxml++.h>
51 #include <boost/weak_ptr.hpp>
61 using std::shared_ptr;
62 using std::dynamic_pointer_cast;
64 using std::make_shared;
65 using boost::shared_array;
66 using boost::optional;
70 InteropSubtitleAsset::InteropSubtitleAsset (boost::filesystem::path file)
71 : SubtitleAsset (file)
73 _raw_xml = dcp::file_to_string (file);
75 auto xml = make_shared<cxml::Document>("DCSubtitle");
76 xml->read_file (file);
77 _id = xml->string_child ("SubtitleID");
78 _reel_number = xml->string_child ("ReelNumber");
79 _language = xml->string_child ("Language");
80 _movie_title = xml->string_child ("MovieTitle");
81 _load_font_nodes = type_children<InteropLoadFontNode> (xml, "LoadFont");
83 /* Now we need to drop down to xmlpp */
85 vector<ParseState> ps;
86 for (auto i: xml->node()->get_children()) {
87 auto e = dynamic_cast<xmlpp::Element const *>(i);
88 if (e && (e->get_name() == "Font" || e->get_name() == "Subtitle")) {
89 parse_subtitles (e, ps, optional<int>(), Standard::INTEROP);
93 for (auto i: _subtitles) {
94 auto si = dynamic_pointer_cast<SubtitleImage>(i);
96 si->read_png_file (file.parent_path() / String::compose("%1.png", si->id()));
102 InteropSubtitleAsset::InteropSubtitleAsset ()
109 InteropSubtitleAsset::xml_as_string () const
112 auto root = doc.create_root_node ("DCSubtitle");
113 root->set_attribute ("Version", "1.0");
115 root->add_child("SubtitleID")->add_child_text (_id);
116 root->add_child("MovieTitle")->add_child_text (_movie_title);
117 root->add_child("ReelNumber")->add_child_text (raw_convert<string> (_reel_number));
118 root->add_child("Language")->add_child_text (_language);
120 for (auto i: _load_font_nodes) {
121 xmlpp::Element* load_font = root->add_child("LoadFont");
122 load_font->set_attribute ("Id", i->id);
123 load_font->set_attribute ("URI", i->uri);
126 subtitles_as_xml (root, 250, Standard::INTEROP);
128 return doc.write_to_string ("UTF-8");
133 InteropSubtitleAsset::add_font (string load_id, dcp::ArrayData data)
135 _fonts.push_back (Font(load_id, make_uuid(), data));
136 auto const uri = String::compose("font_%1.ttf", _load_font_nodes.size());
137 _load_font_nodes.push_back (shared_ptr<InteropLoadFontNode>(new InteropLoadFontNode(load_id, uri)));
142 InteropSubtitleAsset::equals (shared_ptr<const Asset> other_asset, EqualityOptions options, NoteHandler note) const
144 if (!SubtitleAsset::equals (other_asset, options, note)) {
148 auto other = dynamic_pointer_cast<const InteropSubtitleAsset> (other_asset);
153 if (!options.load_font_nodes_can_differ) {
154 auto i = _load_font_nodes.begin();
155 auto j = other->_load_font_nodes.begin();
157 while (i != _load_font_nodes.end ()) {
158 if (j == other->_load_font_nodes.end ()) {
159 note (NoteType::ERROR, "<LoadFont> nodes differ");
164 note (NoteType::ERROR, "<LoadFont> nodes differ");
173 if (_movie_title != other->_movie_title) {
174 note (NoteType::ERROR, "Subtitle movie titles differ");
182 vector<shared_ptr<LoadFontNode>>
183 InteropSubtitleAsset::load_font_nodes () const
185 vector<shared_ptr<LoadFontNode>> lf;
186 copy (_load_font_nodes.begin(), _load_font_nodes.end(), back_inserter (lf));
192 InteropSubtitleAsset::write (boost::filesystem::path p) const
194 auto f = fopen_boost (p, "w");
196 throw FileError ("Could not open file for writing", p, -1);
199 auto const s = xml_as_string ();
200 /* length() here gives bytes not characters */
201 fwrite (s.c_str(), 1, s.length(), f);
206 /* Image subtitles */
207 for (auto i: _subtitles) {
208 auto im = dynamic_pointer_cast<dcp::SubtitleImage> (i);
210 im->write_png_file(p.parent_path() / String::compose("%1.png", im->id()));
215 for (auto i: _load_font_nodes) {
216 auto file = p.parent_path() / i->uri;
217 auto j = _fonts.begin();
218 while (j != _fonts.end() && j->load_id != i->id) {
221 if (j != _fonts.end ()) {
222 j->data.write (file);
229 /** Look at a supplied list of assets and find the fonts. Then match these
230 * fonts up with anything requested by a <LoadFont> so that _fonts contains
231 * a list of font ID, load ID and data.
234 InteropSubtitleAsset::resolve_fonts (vector<shared_ptr<Asset>> assets)
236 for (auto i: assets) {
237 auto font = dynamic_pointer_cast<FontAsset> (i);
242 for (auto j: _load_font_nodes) {
244 for (auto const& k: _fonts) {
245 if (k.load_id == j->id) {
251 if (!got && font->file() && j->uri == font->file()->leaf().string()) {
252 _fonts.push_back (Font (j->id, i->id(), font->file().get()));
260 InteropSubtitleAsset::add_font_assets (vector<shared_ptr<Asset>>& assets)
262 for (auto const& i: _fonts) {
264 assets.push_back (make_shared<FontAsset>(i.uuid, i.file.get()));
270 InteropSubtitleAsset::write_to_assetmap (xmlpp::Node* node, boost::filesystem::path root) const
272 Asset::write_to_assetmap (node, root);
274 for (auto i: _subtitles) {
275 auto im = dynamic_pointer_cast<dcp::SubtitleImage> (i);
277 DCP_ASSERT (im->file());
278 write_file_to_assetmap (node, root, im->file().get(), im->id());
285 InteropSubtitleAsset::add_to_pkl (shared_ptr<PKL> pkl, boost::filesystem::path root) const
287 Asset::add_to_pkl (pkl, root);
289 for (auto i: _subtitles) {
290 auto im = dynamic_pointer_cast<dcp::SubtitleImage> (i);
292 auto png_image = im->png_image ();
293 pkl->add_asset (im->id(), optional<string>(), make_digest(png_image), png_image.size(), "image/png");
300 InteropSubtitleAsset::set_font_file (string load_id, boost::filesystem::path file)
302 for (auto& i: _fonts) {
303 if (i.load_id == load_id) {
308 for (auto i: _load_font_nodes) {
309 if (i->id == load_id) {
310 i->uri = file.filename().string();