Asset -> MXF in some cases.

1 files changed, 155 insertions, 0 deletions

diff --git a/src/mxf.cc b/src/mxf.cc
new file mode 100644
index 00000000..e37b2822
--- /dev/null
+++ b/src/mxf.cc
@@ -0,0 +1,155 @@
+/*
+    Copyright (C) 2012 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.cc
+ *  @brief Parent class for assets of DCPs made up of MXF files.
+ */
+
+#include <iostream>
+#include <boost/filesystem.hpp>
+#include <boost/lexical_cast.hpp>
+#include <libxml++/nodes/element.h>
+#include "AS_DCP.h"
+#include "KM_prng.h"
+#include "KM_util.h"
+#include "mxf.h"
+#include "util.h"
+#include "metadata.h"
+#include "exceptions.h"
+#include "kdm.h"
+
+using std::string;
+using std::list;
+using std::pair;
+using boost::shared_ptr;
+using boost::lexical_cast;
+using boost::dynamic_pointer_cast;
+using namespace dcp;
+
+MXF::MXF (boost::filesystem::path directory, boost::filesystem::path file_name)
+	: ContentAsset (directory, file_name)
+	, _progress (0)
+	, _encryption_context (0)
+	, _decryption_context (0)
+	, _interop (false)
+{
+
+}
+
+MXF::~MXF ()
+{
+	delete _encryption_context;
+	delete _decryption_context;
+}
+
+void
+MXF::fill_writer_info (ASDCP::WriterInfo* writer_info)
+{
+	writer_info->ProductVersion = _metadata.product_version;
+	writer_info->CompanyName = _metadata.company_name;
+	writer_info->ProductName = _metadata.product_name.c_str();
+
+	if (_interop) {
+		writer_info->LabelSetType = ASDCP::LS_MXF_INTEROP;
+	} else {
+		writer_info->LabelSetType = ASDCP::LS_MXF_SMPTE;
+	}
+	unsigned int c;
+	Kumu::hex2bin (_uuid.c_str(), writer_info->AssetUUID, Kumu::UUID_Length, &c);
+	assert (c == Kumu::UUID_Length);
+
+	if (_key) {
+		Kumu::GenRandomUUID (writer_info->ContextID);
+		writer_info->EncryptedEssence = true;
+
+		unsigned int c;
+		Kumu::hex2bin (_key_id.c_str(), writer_info->CryptographicKeyID, Kumu::UUID_Length, &c);
+		assert (c == Kumu::UUID_Length);
+	}
+}
+
+bool
+MXF::equals (shared_ptr<const ContentAsset> other, EqualityOptions opt, boost::function<void (NoteType, string)> note) const
+{
+	if (!ContentAsset::equals (other, opt, note)) {
+		return false;
+	}
+	
+	shared_ptr<const MXF> other_mxf = dynamic_pointer_cast<const MXF> (other);
+	if (!other_mxf) {
+		note (ERROR, "comparing an MXF asset with a non-MXF asset");
+		return false;
+	}
+	
+	if (_file_name != other_mxf->_file_name) {
+		note (ERROR, "MXF names differ");
+		if (!opt.mxf_names_can_differ) {
+			return false;
+		}
+	}
+	
+	return true;
+}
+
+void
+MXF::write_to_cpl (xmlpp::Element* node) const
+{
+	pair<string, string> const attr = cpl_node_attribute ();
+	xmlpp::Element* a = node->add_child (cpl_node_name ());
+	if (!attr.first.empty ()) {
+		a->set_attribute (attr.first, attr.second);
+	}
+	a->add_child ("Id")->add_child_text ("urn:uuid:" + _uuid);
+	a->add_child ("AnnotationText")->add_child_text (_file_name.string ());
+	a->add_child ("EditRate")->add_child_text (lexical_cast<string> (_edit_rate) + " 1");
+	a->add_child ("IntrinsicDuration")->add_child_text (lexical_cast<string> (_intrinsic_duration));
+	a->add_child ("EntryPoint")->add_child_text (lexical_cast<string> (_entry_point));
+	a->add_child ("Duration")->add_child_text (lexical_cast<string> (_duration));
+	if (!_key_id.empty ()) {
+		a->add_child("KeyId")->add_child_text ("urn:uuid:" + _key_id);
+	}
+}
+
+void
+MXF::set_key (Key key)
+{
+	_key = key;
+
+	if (_key_id.empty ()) {
+		/* No key ID so far; we now need one */
+		_key_id = make_uuid ();
+	}
+	
+	_decryption_context = new ASDCP::AESDecContext;
+	if (ASDCP_FAILURE (_decryption_context->InitKey (_key->value ()))) {
+		throw MiscError ("could not set up decryption context");
+	}
+
+	_encryption_context = new ASDCP::AESEncContext;
+	if (ASDCP_FAILURE (_encryption_context->InitKey (_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");
+	}
+}