MXF -> Asset in lots of places.

1 files changed, 68 insertions, 0 deletions

diff --git a/src/asset_writer.cc b/src/asset_writer.cc
new file mode 100644
index 00000000..eb55feaf
--- /dev/null
+++ b/src/asset_writer.cc
@@ -0,0 +1,68 @@
+/*
+    Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
+
+    This program 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,
+    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.
+
+*/
+
+/** @file  src/asset_writer.h
+ *  @brief AssetWriter class.
+ */
+
+#include "asset_writer.h"
+#include "mxf.h"
+#include "dcp_assert.h"
+#include "AS_DCP.h"
+#include "KM_prng.h"
+
+using namespace dcp;
+
+/** Create an AssetWriter.
+ *  @param mxf MXF that we are writing.
+ *  @param file File to write to.
+ */
+AssetWriter::AssetWriter (MXF* mxf, boost::filesystem::path file)
+	: _mxf (mxf)
+	, _file (file)
+	, _frames_written (0)
+	, _finalized (false)
+	, _encryption_context (0)
+{
+	if (mxf->key ()) {
+		_encryption_context = new ASDCP::AESEncContext;
+		if (ASDCP_FAILURE (_encryption_context->InitKey (mxf->key()->value ()))) {
+			throw MiscError ("could not set up encryption context");
+		}
+		
+		uint8_t cbc_buffer[ASDCP::CBC_BLOCK_SIZE];
+		
+		Kumu::FortunaRNG rng;
+		if (ASDCP_FAILURE (_encryption_context->SetIVec (rng.FillRandom (cbc_buffer, ASDCP::CBC_BLOCK_SIZE)))) {
+			throw MiscError ("could not set up CBC initialization vector");
+		}
+	}
+}
+
+AssetWriter::~AssetWriter ()
+{
+	delete _encryption_context;
+}
+
+void
+AssetWriter::finalize ()
+{
+	DCP_ASSERT (!_finalized);
+	_finalized = true;
+}