2 Copyright (C) 2012-2021 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/>.
19 In addition, as a special exception, the copyright holders give
20 permission to link the code of portions of this program with the
21 OpenSSL library under certain conditions as described in each
22 individual source file, and distribute linked combinations
25 You must obey the GNU General Public License in all respects
26 for all of the code used other than OpenSSL. If you modify
27 file(s) with this exception, you may extend this exception to your
28 version of the file(s), but you are not obligated to do so. If you
29 do not wish to do so, delete this exception statement from your
30 version. If you delete this exception statement from all source
31 files in the program, then also delete it here.
35 /** @file src/mono_picture_asset_writer.cc
36 * @brief MonoPictureAssetWriter class
40 #include "crypto_context.h"
41 #include "dcp_assert.h"
42 #include "exceptions.h"
43 #include "mono_picture_asset_writer.h"
44 #include "picture_asset.h"
46 LIBDCP_DISABLE_WARNINGS
47 #include <asdcp/AS_DCP.h>
48 #include <asdcp/KM_fileio.h>
49 LIBDCP_ENABLE_WARNINGS
52 #include "picture_asset_writer_common.cc"
56 using std::shared_ptr;
60 struct MonoPictureAssetWriter::ASDCPState : public ASDCPStateBase
62 ASDCP::JP2K::MXFWriter mxf_writer;
66 /** @param a Asset to write to. `a' must not be deleted while
67 * this writer class still exists, or bad things will happen.
69 MonoPictureAssetWriter::MonoPictureAssetWriter (PictureAsset* asset, boost::filesystem::path file, bool overwrite)
70 : PictureAssetWriter (asset, file, overwrite)
71 , _state (new MonoPictureAssetWriter::ASDCPState)
77 MonoPictureAssetWriter::~MonoPictureAssetWriter()
80 /* Last-resort finalization to close the file, at least */
82 _state->mxf_writer.Finalize();
89 MonoPictureAssetWriter::start (uint8_t const * data, int size)
91 dcp::start (this, _state, _picture_asset, data, size);
92 _picture_asset->set_frame_rate (_picture_asset->edit_rate());
97 MonoPictureAssetWriter::write (uint8_t const * data, int size)
99 DCP_ASSERT (!_finalized);
105 if (ASDCP_FAILURE (_state->j2k_parser.OpenReadFrame(data, size, _state->frame_buffer))) {
106 boost::throw_exception (MiscError ("could not parse J2K frame"));
109 _state->frame_buffer.PlaintextOffset(0);
111 uint64_t const before_offset = _state->mxf_writer.Tell ();
114 auto const r = _state->mxf_writer.WriteFrame (_state->frame_buffer, _crypto_context->context(), _crypto_context->hmac(), &hash);
115 if (ASDCP_FAILURE(r)) {
116 boost::throw_exception (MXFFileError ("error in writing video MXF", _file.string(), r));
120 return FrameInfo (before_offset, _state->mxf_writer.Tell() - before_offset, hash);
125 MonoPictureAssetWriter::fake_write (int size)
127 DCP_ASSERT (_started);
128 DCP_ASSERT (!_finalized);
130 auto r = _state->mxf_writer.FakeWriteFrame (size);
131 if (ASDCP_FAILURE(r)) {
132 boost::throw_exception (MXFFileError("error in writing video MXF", _file.string(), r));
140 MonoPictureAssetWriter::finalize ()
143 auto r = _state->mxf_writer.Finalize();
144 if (ASDCP_FAILURE(r)) {
145 boost::throw_exception (MXFFileError("error in finalizing video MXF", _file.string(), r));
149 _picture_asset->_intrinsic_duration = _frames_written;
150 return PictureAssetWriter::finalize ();