2 Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
4 This file is part of libdcp.
6 libdcp is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 libdcp is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with libdcp. If not, see <http://www.gnu.org/licenses/>.
20 /** @file src/asset_writer.h
21 * @brief AssetWriter class.
24 #include "asset_writer.h"
26 #include "dcp_assert.h"
32 /** Create an AssetWriter.
33 * @param mxf MXF that we are writing.
34 * @param file File to write to.
36 AssetWriter::AssetWriter (MXF* mxf, boost::filesystem::path file, Standard standard)
42 , _encryption_context (0)
46 _encryption_context = new ASDCP::AESEncContext;
47 if (ASDCP_FAILURE (_encryption_context->InitKey (mxf->key()->value ()))) {
48 throw MiscError ("could not set up encryption context");
51 uint8_t cbc_buffer[ASDCP::CBC_BLOCK_SIZE];
54 if (ASDCP_FAILURE (_encryption_context->SetIVec (rng.FillRandom (cbc_buffer, ASDCP::CBC_BLOCK_SIZE)))) {
55 throw MiscError ("could not set up CBC initialization vector");
58 _hmac_context = new ASDCP::HMACContext;
60 ASDCP::LabelSet_t type;
61 if (standard == INTEROP) {
62 type = ASDCP::LS_MXF_INTEROP;
64 type = ASDCP::LS_MXF_SMPTE;
67 if (ASDCP_FAILURE (_hmac_context->InitKey (mxf->key()->value(), type))) {
68 throw MiscError ("could not set up HMAC context");
73 AssetWriter::~AssetWriter ()
75 delete _encryption_context;
79 /** @return true if anything was written by this writer */
81 AssetWriter::finalize ()
83 DCP_ASSERT (!_finalized);