/*
- Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2021 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.
*/
-/** @file src/asset.cc
- * @brief Parent class for assets of DCPs made up of MXF files.
+
+/** @file src/mxf.cc
+ * @brief MXF class
*/
-#include "AS_DCP.h"
-#include "KM_prng.h"
-#include "KM_util.h"
+
+#include "raw_convert.h"
#include "mxf.h"
#include "util.h"
#include "metadata.h"
#include "exceptions.h"
-#include "kdm.h"
+#include "dcp_assert.h"
+#include "compose.hpp"
+#include <asdcp/AS_DCP.h>
+#include <asdcp/KM_prng.h>
+#include <asdcp/KM_util.h>
#include <libxml++/nodes/element.h>
#include <boost/filesystem.hpp>
-#include <boost/lexical_cast.hpp>
#include <iostream>
+
using std::string;
+using std::cout;
using std::list;
using std::pair;
-using boost::shared_ptr;
-using boost::lexical_cast;
-using boost::dynamic_pointer_cast;
+using std::shared_ptr;
+using std::dynamic_pointer_cast;
using namespace dcp;
-MXF::MXF (Fraction edit_rate)
- : Content (edit_rate)
- , _progress (0)
- , _encryption_context (0)
- , _decryption_context (0)
-{
+MXF::MXF ()
+ : _context_id (make_uuid ())
+{
+ /* Subclasses can create MXFs with unspecified _standard but are expected to fill
+ _standard in once the MXF is read.
+ */
}
-MXF::MXF (boost::filesystem::path file)
- : Content (file)
- , _progress (0)
- , _encryption_context (0)
- , _decryption_context (0)
+
+MXF::MXF (Standard standard)
+ : _context_id (make_uuid ())
+ , _standard (standard)
{
}
-MXF::~MXF ()
-{
- delete _encryption_context;
- delete _decryption_context;
-}
void
-MXF::fill_writer_info (ASDCP::WriterInfo* writer_info, Standard standard)
+MXF::fill_writer_info (ASDCP::WriterInfo* writer_info, string id) const
{
writer_info->ProductVersion = _metadata.product_version;
writer_info->CompanyName = _metadata.company_name;
- writer_info->ProductName = _metadata.product_name.c_str();
+ writer_info->ProductName = _metadata.product_name;
- if (standard == INTEROP) {
+ DCP_ASSERT (_standard);
+ if (_standard == Standard::INTEROP) {
writer_info->LabelSetType = ASDCP::LS_MXF_INTEROP;
} else {
writer_info->LabelSetType = ASDCP::LS_MXF_SMPTE;
}
unsigned int c;
- Kumu::hex2bin (_id.c_str(), writer_info->AssetUUID, Kumu::UUID_Length, &c);
- assert (c == Kumu::UUID_Length);
+ Kumu::hex2bin (id.c_str(), writer_info->AssetUUID, Kumu::UUID_Length, &c);
+ DCP_ASSERT (c == Kumu::UUID_Length);
+
+ writer_info->UsesHMAC = true;
- if (_key) {
- Kumu::GenRandomUUID (writer_info->ContextID);
+ if (_key_id) {
+ Kumu::hex2bin (_context_id.c_str(), writer_info->ContextID, Kumu::UUID_Length, &c);
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);
+ Kumu::hex2bin (_key_id.get().c_str(), writer_info->CryptographicKeyID, Kumu::UUID_Length, &c);
+ DCP_ASSERT (c == Kumu::UUID_Length);
}
}
-bool
-MXF::equals (shared_ptr<const Content> other, EqualityOptions opt, boost::function<void (NoteType, string)> note) const
-{
- if (!Content::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 != other_mxf->file ()) {
- note (ERROR, "MXF names differ");
- if (!opt.mxf_names_can_differ) {
- return false;
- }
- }
-
- return true;
-}
void
MXF::set_key (Key key)
{
_key = key;
- if (_key_id.empty ()) {
+ if (!_key_id) {
/* 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");
+
+string
+MXF::read_writer_info (ASDCP::WriterInfo const & info)
+{
+ char buffer[64];
+
+ if (info.EncryptedEssence) {
+ Kumu::bin2UUIDhex (info.CryptographicKeyID, ASDCP::UUIDlen, buffer, sizeof (buffer));
+ _key_id = buffer;
}
-
- 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");
+
+ switch (info.LabelSetType) {
+ case ASDCP::LS_MXF_INTEROP:
+ _standard = Standard::INTEROP;
+ break;
+ case ASDCP::LS_MXF_SMPTE:
+ _standard = Standard::SMPTE;
+ break;
+ default:
+ throw ReadError ("Unrecognised label set type in MXF");
}
+
+ _metadata.read (info);
+
+ Kumu::bin2UUIDhex (info.AssetUUID, ASDCP::UUIDlen, buffer, sizeof (buffer));
+ return buffer;
}
projects / libdcp.git / blobdiff