libdcp
stereo_picture_frame.cc
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1 /*
2  Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
3 
4  This file is part of libdcp.
5 
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.
10 
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.
15 
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/>.
18 
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
23  including the two.
24 
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.
32 */
33 
34 
40 #include "colour_conversion.h"
41 #include "compose.hpp"
42 #include "crypto_context.h"
43 #include "exceptions.h"
44 #include "j2k_transcode.h"
45 #include "rgb_xyz.h"
46 #include "stereo_picture_frame.h"
47 #include "util.h"
48 #include <asdcp/AS_DCP.h>
49 #include <asdcp/KM_fileio.h>
50 
51 
52 using std::string;
53 using std::shared_ptr;
54 using std::make_shared;
55 using namespace dcp;
56 
57 
58 StereoPictureFrame::Part::Part (shared_ptr<ASDCP::JP2K::SFrameBuffer> buffer, Eye eye)
59  : _buffer (buffer)
60  , _eye (eye)
61 {
62 
63 }
64 
65 
66 ASDCP::JP2K::FrameBuffer &
67 StereoPictureFrame::Part::mono () const
68 {
69  return _eye == Eye::LEFT ? _buffer->Left : _buffer->Right;
70 }
71 
72 
73 uint8_t const *
74 StereoPictureFrame::Part::data () const
75 {
76  return mono().RoData();
77 }
78 
79 
80 uint8_t *
81 StereoPictureFrame::Part::data ()
82 {
83  return mono().Data();
84 }
85 
86 
87 int
88 StereoPictureFrame::Part::size () const
89 {
90  return mono().Size();
91 }
92 
93 
99 StereoPictureFrame::StereoPictureFrame (ASDCP::JP2K::MXFSReader* reader, int n, shared_ptr<DecryptionContext> c, bool check_hmac)
100 {
101  /* XXX: unfortunate guesswork on this buffer size */
102  _buffer = make_shared<ASDCP::JP2K::SFrameBuffer>(4 * Kumu::Megabyte);
103 
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)));
106  }
107 }
108 
109 
110 StereoPictureFrame::StereoPictureFrame ()
111 {
112  _buffer = make_shared<ASDCP::JP2K::SFrameBuffer>(4 * Kumu::Megabyte);
113 }
114 
115 
121 shared_ptr<OpenJPEGImage>
122 StereoPictureFrame::xyz_image (Eye eye, int reduce) const
123 {
124  switch (eye) {
125  case Eye::LEFT:
126  return decompress_j2k (const_cast<uint8_t*>(_buffer->Left.RoData()), _buffer->Left.Size(), reduce);
127  case Eye::RIGHT:
128  return decompress_j2k (const_cast<uint8_t*>(_buffer->Right.RoData()), _buffer->Right.Size(), reduce);
129  }
130 
131  return {};
132 }
133 
134 
135 shared_ptr<StereoPictureFrame::Part>
136 StereoPictureFrame::right () const
137 {
138  return make_shared<Part>(_buffer, Eye::RIGHT);
139 }
140 
141 
142 shared_ptr<StereoPictureFrame::Part>
143 StereoPictureFrame::left () const
144 {
145  return make_shared<Part>(_buffer, Eye::LEFT);
146 }
147 
148 
Any error that occurs when reading data from a DCP.
Definition: exceptions.h:106
std::shared_ptr< OpenJPEGImage > xyz_image(Eye eye, int reduce=0) const
ColourConversion class.
Exceptions thrown by libdcp.
Methods to encode and decode JPEG2000.
Namespace for everything in libdcp.
Definition: array_data.h:50
std::shared_ptr< OpenJPEGImage > decompress_j2k(uint8_t const *data, int64_t size, int reduce)
Conversion between RGB and XYZ.
StereoPictureFrame class.
Utility methods and classes.