2 Copyright (C) 2020-2021 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/combine.cc
36 * @brief Method to combine DCPs
44 #include "dcp_assert.h"
45 #include "exceptions.h"
46 #include "font_asset.h"
47 #include "interop_subtitle_asset.h"
48 #include "raw_convert.h"
49 #include <boost/filesystem.hpp>
59 using std::dynamic_pointer_cast;
60 using boost::optional;
61 using std::shared_ptr;
64 boost::filesystem::path
65 make_unique (boost::filesystem::path path)
67 if (!boost::filesystem::exists(path)) {
71 for (int i = 0; i < 10000; ++i) {
72 boost::filesystem::path p = path.parent_path() / (path.stem().string() + dcp::raw_convert<string>(i) + path.extension().string());
73 if (!boost::filesystem::exists(p)) {
85 create_hard_link_or_copy (boost::filesystem::path from, boost::filesystem::path to)
88 create_hard_link (from, to);
89 } catch (boost::filesystem::filesystem_error& e) {
90 if (e.code() == boost::system::errc::cross_device_link) {
101 vector<boost::filesystem::path> inputs,
102 boost::filesystem::path output,
106 string annotation_text,
107 shared_ptr<const CertificateChain> signer
110 using namespace boost::filesystem;
112 DCP_ASSERT (!inputs.empty());
114 DCP output_dcp (output);
115 optional<dcp::Standard> standard;
117 for (auto i: inputs) {
121 standard = *dcp.standard();
122 } else if (standard != dcp.standard()) {
123 throw CombineError ("Cannot combine Interop and SMPTE DCPs.");
128 vector<shared_ptr<dcp::Asset>> assets;
130 for (auto i: inputs) {
134 for (auto j: dcp.cpls()) {
138 for (auto j: dcp.assets(true)) {
139 if (dynamic_pointer_cast<dcp::CPL>(j)) {
143 auto sub = dynamic_pointer_cast<dcp::InteropSubtitleAsset>(j);
145 /* Interop fonts are really fiddly. The font files are assets (in the ASSETMAP)
146 * and also linked from the font XML by filename. We have to fix both these things,
147 * and re-write the font XML file since the font URI might have changed if it's a duplicate
150 auto fonts = sub->font_filenames ();
151 for (auto const& k: fonts) {
152 sub->set_font_file (k.first, make_unique(output / k.second.filename()));
154 auto file = sub->file();
156 path new_path = make_unique(output / file->filename());
157 sub->write (new_path);
160 assets.push_back (j);
164 output_dcp.resolve_refs (assets);
166 for (auto i: output_dcp.assets()) {
167 if (!dynamic_pointer_cast<dcp::FontAsset>(i) && !dynamic_pointer_cast<dcp::CPL>(i)) {
168 auto file = i->file();
170 path new_path = make_unique(output / file->filename());
171 create_hard_link_or_copy (*file, new_path);
172 i->set_file (new_path);
176 output_dcp.write_xml (issuer, creator, issue_date, annotation_text, signer);