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/stereo_picture_asset_writer.cc
36 * @brief StereoPictureAssetWriter class
40 #include "stereo_picture_asset_writer.h"
41 #include "exceptions.h"
42 #include "dcp_assert.h"
43 #include "picture_asset.h"
44 #include "crypto_context.h"
45 #include <asdcp/AS_DCP.h>
46 #include <asdcp/KM_fileio.h>
49 #include "picture_asset_writer_common.cc"
53 using std::shared_ptr;
57 struct StereoPictureAssetWriter::ASDCPState : public ASDCPStateBase
59 ASDCP::JP2K::MXFSWriter mxf_writer;
63 StereoPictureAssetWriter::StereoPictureAssetWriter (PictureAsset* mxf, boost::filesystem::path file, bool overwrite)
64 : PictureAssetWriter (mxf, file, overwrite)
65 , _state (new StereoPictureAssetWriter::ASDCPState)
71 StereoPictureAssetWriter::~StereoPictureAssetWriter()
74 /* Last-resort finalization to close the file, at least */
76 _state->mxf_writer.Finalize();
83 StereoPictureAssetWriter::start (uint8_t const * data, int size)
85 dcp::start (this, _state, _picture_asset, data, size);
86 _picture_asset->set_frame_rate (Fraction (_picture_asset->edit_rate().numerator * 2, _picture_asset->edit_rate().denominator));
91 StereoPictureAssetWriter::write (uint8_t const * data, int size)
93 DCP_ASSERT (!_finalized);
99 if (ASDCP_FAILURE (_state->j2k_parser.OpenReadFrame (data, size, _state->frame_buffer))) {
100 boost::throw_exception (MiscError ("could not parse J2K frame"));
103 _state->frame_buffer.PlaintextOffset(0);
105 uint64_t const before_offset = _state->mxf_writer.Tell ();
108 auto r = _state->mxf_writer.WriteFrame (
109 _state->frame_buffer,
110 _next_eye == Eye::LEFT ? ASDCP::JP2K::SP_LEFT : ASDCP::JP2K::SP_RIGHT,
111 _crypto_context->context(),
112 _crypto_context->hmac(),
116 if (ASDCP_FAILURE (r)) {
117 boost::throw_exception (MXFFileError ("error in writing video MXF", _file.string(), r));
120 _next_eye = _next_eye == Eye::LEFT ? Eye::RIGHT : Eye::LEFT;
122 if (_next_eye == Eye::LEFT) {
126 return FrameInfo (before_offset, _state->mxf_writer.Tell() - before_offset, hash);
131 StereoPictureAssetWriter::fake_write (int size)
133 DCP_ASSERT (_started);
134 DCP_ASSERT (!_finalized);
136 auto r = _state->mxf_writer.FakeWriteFrame (size, _next_eye == Eye::LEFT ? ASDCP::JP2K::SP_LEFT : ASDCP::JP2K::SP_RIGHT);
137 if (ASDCP_FAILURE(r)) {
138 boost::throw_exception (MXFFileError("error in writing video MXF", _file.string(), r));
141 _next_eye = _next_eye == Eye::LEFT ? Eye::RIGHT : Eye::LEFT;
142 if (_next_eye == Eye::LEFT) {
149 StereoPictureAssetWriter::finalize ()
152 auto r = _state->mxf_writer.Finalize();
153 if (ASDCP_FAILURE(r)) {
154 boost::throw_exception (MXFFileError("error in finalizing video MXF", _file.string(), r));
158 _picture_asset->_intrinsic_duration = _frames_written;
159 return PictureAssetWriter::finalize ();