Support reading of encrypted subtitles.

[libdcp.git] / src / mxf.h

diff --git a/src/mxf.h b/src/mxf.h
index 9c5b095aece26bfc2f09a3f653d4ca76bcffd079..73ada433510b640041beba4afdf2556a5a2dfe96 100644 (file)
--- a/src/mxf.h
+++ b/src/mxf.h
@@ -1,20 +1,34 @@
 /*
     Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of libdcp.
+
+    libdcp is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
-    This program is distributed in the hope that it will be useful,
+    libdcp is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
+    along with libdcp.  If not, see <http://www.gnu.org/licenses/>.
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of portions of this program with the
+    OpenSSL library under certain conditions as described in each
+    individual source file, and distribute linked combinations
+    including the two.
+
+    You must obey the GNU General Public License in all respects
+    for all of the code used other than OpenSSL.  If you modify
+    file(s) with this exception, you may extend this exception to your
+    version of the file(s), but you are not obligated to do so.  If you
+    do not wish to do so, delete this exception statement from your
+    version.  If you delete this exception statement from all source
+    files in the program, then also delete it here.
 */
 
 #ifndef LIBDCP_MXF_H
@@ -27,9 +41,8 @@
 #include <boost/signals2.hpp>
 
 namespace ASDCP {
-       class AESEncContext;
        class AESDecContext;
-       class WriterInfo;
+       struct WriterInfo;
 }
 
 /* Undefine some stuff that the OS X 10.5 SDK defines */
@@ -40,27 +53,19 @@ namespace dcp
 {
 
 class MXFMetadata;
-class PictureMXFWriter;        
+class PictureAssetWriter;
 
 /** @class MXF
- *  @brief Parent class for classes which represent MXF files.
+ *  @brief Parent for classes which represent MXF files.
  */
-class MXF : public Asset
+class MXF
 {
 public:
-       MXF ();
-       MXF (boost::filesystem::path file);
-       ~MXF ();
-
-       bool equals (
-               boost::shared_ptr<const Asset> other,
-               EqualityOptions opt,
-               NoteHandler note
-               ) const;
+       virtual ~MXF () {}
 
        /** @return true if the data is encrypted */
        bool encrypted () const {
-               return !_key_id.empty ();
+               return static_cast<bool>(_key_id);
        }
 
        /** Set the ID of the key that is used for encryption/decryption.
@@ -70,23 +75,18 @@ public:
                _key_id = i;
        }
 
-       /** @return the ID of the key used for encryption/decryption, or an empty string */
-       std::string key_id () const {
+       /** @return the ID of the key used for encryption/decryption, if there is one */
+       boost::optional<std::string> key_id () const {
                return _key_id;
        }
 
-       void set_key (Key);
+       virtual void set_key (Key);
 
        /** @return encryption/decryption key, if one has been set */
        boost::optional<Key> key () const {
                return _key;
        }
 
-       /** @return encryption context, set up with any key that has been passed to set_key() */
-       ASDCP::AESEncContext* encryption_context () const {
-               return _encryption_context;
-       }
-
        /** Set the metadata that is written to the MXF file.
         *  @param m Metadata.
         */
@@ -98,22 +98,20 @@ public:
        MXFMetadata metadata () const {
                return _metadata;
        }
-       
+
 protected:
        template <class P, class Q>
-       friend void start (PictureMXFWriter* writer, boost::shared_ptr<P> state, Standard standard, Q* mxf, uint8_t* data, int size);
+       friend void start (PictureAssetWriter* writer, boost::shared_ptr<P> state, Standard standard, Q* mxf, uint8_t* data, int size);
 
-       void read_writer_info (ASDCP::WriterInfo const &);
+       std::string read_writer_info (ASDCP::WriterInfo const &);
        /** Fill in a ADSCP::WriteInfo struct.
         *  @param w struct to fill in.
         *  @param standard INTEROP or SMPTE.
         */
-       void fill_writer_info (ASDCP::WriterInfo* w, Standard standard);
+       void fill_writer_info (ASDCP::WriterInfo* w, std::string id, Standard standard) const;
 
-       ASDCP::AESEncContext* _encryption_context;
-       ASDCP::AESDecContext* _decryption_context;
-       /** ID of the key used for encryption/decryption, or an empty string */
-       std::string _key_id;
+       /** ID of the key used for encryption/decryption, if there is one */
+       boost::optional<std::string> _key_id;
        /** Key used for encryption/decryption, if there is one */
        boost::optional<Key> _key;
        MXFMetadata _metadata;