Tidying a few things up.

[libdcp.git] / src / asset_reader.h

diff --git a/src/asset_reader.h b/src/asset_reader.h
index cfdb468c2f087b8088bd4d2da6814d8d5d0dc024..2da67bd82fb4531e3a48996e69aeb47fe4f783d0 100644 (file)
--- a/src/asset_reader.h
+++ b/src/asset_reader.h
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2016 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2016-2021 Carl Hetherington <cth@carlh.net>
 
     This file is part of libdcp.
 
@@ -15,31 +15,95 @@
 
     You should have received a copy of the GNU General Public License
     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.
 */
 
+
+/** @file  src/asset_reader.h
+ *  @brief AssetReader class
+ */
+
+
 #ifndef LIBDCP_ASSET_READER_H
 #define LIBDCP_ASSET_READER_H
 
-#include <boost/noncopyable.hpp>
 
-namespace ASDCP {
-       class AESDecContext;
-}
+#include "asset.h"
+#include "crypto_context.h"
+#include "dcp_assert.h"
+#include <asdcp/AS_DCP.h>
+#include <memory>
+
 
 namespace dcp {
 
-class MXF;
 
-class AssetReader : public boost::noncopyable
+class AtmosAsset;
+class MonoPictureAsset;
+class SoundAsset;
+class StereoPictureAsset;
+
+
+template <class R, class F>
+class AssetReader
 {
 public:
-       explicit AssetReader (MXF const * mxf);
-       virtual ~AssetReader ();
+       AssetReader (AssetReader const&) = delete;
+       AssetReader& operator== (AssetReader const&) = delete;
+
+       ~AssetReader ()
+       {
+               delete _reader;
+       }
+
+       std::shared_ptr<const F> get_frame (int n) const
+       {
+               /* Can't use make_shared here as the constructor is private */
+               return std::shared_ptr<const F> (new F(_reader, n, _crypto_context));
+       }
+
+       R* reader () const {
+               return _reader;
+       }
 
 protected:
-       ASDCP::AESDecContext* _decryption_context;
+       R* _reader = nullptr;
+       std::shared_ptr<DecryptionContext> _crypto_context;
+
+private:
+       friend class AtmosAsset;
+       friend class MonoPictureAsset;
+       friend class SoundAsset;
+       friend class StereoPictureAsset;
+
+       explicit AssetReader (Asset const * asset, boost::optional<Key> key, Standard standard)
+               : _crypto_context (new DecryptionContext(key, standard))
+       {
+               _reader = new R ();
+               DCP_ASSERT (asset->file());
+               auto const r = _reader->OpenRead (asset->file()->string().c_str());
+               if (ASDCP_FAILURE(r)) {
+                       delete _reader;
+                       boost::throw_exception (FileError("could not open MXF file for reading", asset->file().get(), r));
+               }
+       }
 };
 
+
 }
 
+
 #endif