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
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35 /** @file src/stereo_picture_frame.cc
36 * @brief StereoPictureFrame class
40 #include "colour_conversion.h"
41 #include "compose.hpp"
42 #include "crypto_context.h"
43 #include "exceptions.h"
44 #include "j2k_transcode.h"
46 #include "stereo_picture_frame.h"
48 #include <asdcp/AS_DCP.h>
49 #include <asdcp/KM_fileio.h>
53 using std::shared_ptr;
54 using std::make_shared;
58 StereoPictureFrame::Part::Part (shared_ptr<ASDCP::JP2K::SFrameBuffer> buffer, Eye eye)
66 ASDCP::JP2K::FrameBuffer &
67 StereoPictureFrame::Part::mono () const
69 return _eye == Eye::LEFT ? _buffer->Left : _buffer->Right;
74 StereoPictureFrame::Part::data () const
76 return mono().RoData();
81 StereoPictureFrame::Part::data ()
88 StereoPictureFrame::Part::size () const
94 /** Make a picture frame from a 3D (stereoscopic) asset.
95 * @param reader Reader for the MXF file.
96 * @param n Frame within the asset, not taking EntryPoint into account.
97 * @param check_hmac true to check the HMAC and give an error if it is not as expected.
99 StereoPictureFrame::StereoPictureFrame (ASDCP::JP2K::MXFSReader* reader, int n, shared_ptr<DecryptionContext> c, bool check_hmac)
101 /* XXX: unfortunate guesswork on this buffer size */
102 _buffer = make_shared<ASDCP::JP2K::SFrameBuffer>(4 * Kumu::Megabyte);
104 if (ASDCP_FAILURE (reader->ReadFrame (n, *_buffer, c->context(), check_hmac ? c->hmac() : nullptr))) {
105 boost::throw_exception (ReadError (String::compose ("could not read video frame %1 of %2", n)));
110 StereoPictureFrame::StereoPictureFrame ()
112 _buffer = make_shared<ASDCP::JP2K::SFrameBuffer>(4 * Kumu::Megabyte);
116 /** @param eye Eye to return (EYE_LEFT or EYE_RIGHT).
117 * @param reduce a factor by which to reduce the resolution
118 * of the image, expressed as a power of two (pass 0 for no
121 shared_ptr<OpenJPEGImage>
122 StereoPictureFrame::xyz_image (Eye eye, int reduce) const
126 return decompress_j2k (const_cast<uint8_t*>(_buffer->Left.RoData()), _buffer->Left.Size(), reduce);
128 return decompress_j2k (const_cast<uint8_t*>(_buffer->Right.RoData()), _buffer->Right.Size(), reduce);
135 shared_ptr<StereoPictureFrame::Part>
136 StereoPictureFrame::right () const
138 return make_shared<Part>(_buffer, Eye::RIGHT);
142 shared_ptr<StereoPictureFrame::Part>
143 StereoPictureFrame::left () const
145 return make_shared<Part>(_buffer, Eye::LEFT);