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
30 version. If you delete this exception statement from all source
31 files in the program, then also delete it here.
47 #include "dcp_assert.h"
48 #include <boost/signals2.hpp>
57 /* Undefine some stuff that the OS X 10.5 SDK defines */
67 class PictureAssetWriter;
71 * @brief Parent for classes which represent MXF files
76 MXF (Standard standard);
79 /** @return true if the data is encrypted */
80 bool encrypted () const {
81 return static_cast<bool>(_key_id);
84 /** Set the ID of the key that is used for encryption/decryption.
87 void set_key_id (std::string i) {
91 /** @return the ID of the key used for encryption/decryption, if there is one */
92 boost::optional<std::string> key_id () const {
96 /** Set the (private) key that will be used to encrypt or decrypt this MXF's content
97 * This is the top-secret key that is distributed (itself encrypted) to cinemas
98 * via Key Delivery Messages (KDMs)
99 * @param key Key to use
101 virtual void set_key (Key);
103 /** @return encryption/decryption key, if one has been set */
104 boost::optional<Key> key () const {
108 /** Set the context ID to be used when encrypting.
111 void set_context_id (std::string id) {
115 /** @return context ID used when encrypting; this starts off as a random value */
116 std::string context_id () const {
120 /** Set the metadata that is written to the MXF file.
123 void set_metadata (MXFMetadata m) {
127 /** @return metadata from the MXF file */
128 MXFMetadata metadata () const {
132 Standard standard () const {
133 DCP_ASSERT (_standard);
138 template <class P, class Q>
139 friend void start (PictureAssetWriter* writer, std::shared_ptr<P> state, Q* mxf, uint8_t const * data, int size);
143 /** Read an ASDCP::WriterInfo struct, extracting things for our
145 * @return AssetUUID of the MXF
147 std::string read_writer_info (ASDCP::WriterInfo const &);
149 /** Fill in a ASDCP::WriteInfo struct.
150 * @param w struct to fill in
152 void fill_writer_info (ASDCP::WriterInfo* w, std::string id) const;
154 /** ID of the key used for encryption/decryption, if there is one */
155 boost::optional<std::string> _key_id;
156 /** Key used for encryption/decryption, if there is one */
157 boost::optional<Key> _key;
158 std::string _context_id;
159 MXFMetadata _metadata;
160 boost::optional<Standard> _standard;