Add Reader classes to permit much more efficient DCP reading.

1 files changed, 42 insertions, 0 deletions

diff --git a/src/asset_reader.cc b/src/asset_reader.cc
new file mode 100644
index 00000000..a78af4d3
--- /dev/null
+++ b/src/asset_reader.cc
@@ -0,0 +1,42 @@
+/*
+    Copyright (C) 2016 Carl Hetherington <cth@carlh.net>
+
+    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.
+
+    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 libdcp.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include "asset_reader.h"
+#include "mxf.h"
+#include "exceptions.h"
+#include "AS_DCP.h"
+
+using namespace dcp;
+
+AssetReader::AssetReader (MXF const * mxf)
+	: _decryption_context (0)
+{
+	if (mxf->key()) {
+		_decryption_context = new ASDCP::AESDecContext;
+		if (ASDCP_FAILURE (_decryption_context->InitKey (mxf->key()->value ()))) {
+			throw MiscError ("could not set up decryption context");
+		}
+	}
+}
+
+AssetReader::~AssetReader ()
+{
+	delete _decryption_context;
+}