1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
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;
}
|
