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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/*
Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
This file is part of libdcp.
libdcp 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.
libdcp 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 libdcp. If not, see <http://www.gnu.org/licenses/>.
In addition, as a special exception, the copyright holders give
permission to link the code of portions of this program with the
OpenSSL library under certain conditions as described in each
individual source file, and distribute linked combinations
including the two.
You must obey the GNU General Public License in all respects
for all of the code used other than OpenSSL. If you modify
file(s) with this exception, you may extend this exception to your
version of the file(s), but you are not obligated to do so. If you
do not wish to do so, delete this exception statement from your
version. If you delete this exception statement from all source
files in the program, then also delete it here.
*/
#include "compose.hpp"
#include "data.h"
#include "dcp_assert.h"
#include "exceptions.h"
#include "j2k_transcode.h"
#include "openjpeg_image.h"
#include <openjpeg.h>
#include <cmath>
using std::min;
using std::pow;
using std::shared_ptr;
using std::string;
using namespace dcp;
shared_ptr<dcp::OpenJPEGImage>
dcp::decompress_j2k(Data const& data, int reduce)
{
return dcp::decompress_j2k (data.data(), data.size(), reduce);
}
shared_ptr<dcp::OpenJPEGImage>
dcp::decompress_j2k(shared_ptr<const Data> data, int reduce)
{
return dcp::decompress_j2k(data->data(), data->size(), reduce);
}
/** Decompress a JPEG2000 image to a bitmap.
* @param data JPEG2000 data.
* @param size Size of data in bytes.
* @param reduce A power of 2 by which to reduce the size of the decoded image;
* e.g. 0 reduces by (2^0 == 1), ie keeping the same size.
* 1 reduces by (2^1 == 2), ie halving the size of the image.
* This is useful for scaling 4K DCP images down to 2K.
* @return XYZ image.
*/
shared_ptr<dcp::OpenJPEGImage>
dcp::decompress_j2k(uint8_t const* data, int64_t size, int reduce)
{
auto decoder = opj_create_decompress(CODEC_J2K);
opj_dparameters_t parameters;
opj_set_default_decoder_parameters(¶meters);
parameters.cp_reduce = reduce;
opj_setup_decoder(decoder, ¶meters);
auto cio = opj_cio_open((opj_common_ptr) decoder, const_cast<uint8_t*>(data), size);
auto image = opj_decode(decoder, cio);
if (!image) {
opj_destroy_decompress(decoder);
opj_cio_close (cio);
boost::throw_exception(ReadError(String::compose ("could not decode JPEG2000 codestream of %1 bytes.", size)));
}
opj_destroy_decompress(decoder);
opj_cio_close(cio);
image->x1 = rint(float(image->x1) / pow (2, reduce));
image->y1 = rint(float(image->y1) / pow (2, reduce));
return std::make_shared<OpenJPEGImage>(image);
}
ArrayData
dcp::compress_j2k(shared_ptr<const OpenJPEGImage> xyz, int bandwidth, int frames_per_second, bool threed, bool fourk, string comment)
{
/* Set the max image and component sizes based on frame_rate */
int max_cs_len = ((float) bandwidth) / 8 / frames_per_second;
if (threed) {
/* In 3D we have only half the normal bandwidth per eye */
max_cs_len /= 2;
}
int const max_comp_size = max_cs_len / 1.25;
/* get a J2K compressor handle */
auto cinfo = opj_create_compress(CODEC_J2K);
if (cinfo == 0) {
throw MiscError ("could not create JPEG2000 encoder");
}
if (comment.empty()) {
/* asdcplib complains with "Illegal data size" when reading frames encoded with an empty comment */
throw MiscError("compress_j2k comment can not be an empty string");
}
/* Set encoding parameters to default values */
opj_cparameters_t parameters;
opj_set_default_encoder_parameters(¶meters);
if (fourk) {
parameters.numresolution = 7;
}
/* Set default cinema parameters */
parameters.tile_size_on = false;
parameters.cp_tdx = 1;
parameters.cp_tdy = 1;
/* Tile part */
parameters.tp_flag = 'C';
parameters.tp_on = 1;
/* Tile and Image shall be at (0,0) */
parameters.cp_tx0 = 0;
parameters.cp_ty0 = 0;
parameters.image_offset_x0 = 0;
parameters.image_offset_y0 = 0;
/* Codeblock size = 32x32 */
parameters.cblockw_init = 32;
parameters.cblockh_init = 32;
parameters.csty |= 0x01;
/* The progression order shall be CPRL */
parameters.prog_order = CPRL;
/* No ROI */
parameters.roi_compno = -1;
parameters.subsampling_dx = 1;
parameters.subsampling_dy = 1;
/* 9-7 transform */
parameters.irreversible = 1;
parameters.tcp_rates[0] = 0;
parameters.tcp_numlayers++;
parameters.cp_disto_alloc = 1;
parameters.cp_rsiz = fourk ? CINEMA4K : CINEMA2K;
parameters.cp_comment = strdup(comment.c_str());
if (fourk) {
parameters.numpocs = 2;
parameters.POC[0].tile = 1;
parameters.POC[0].resno0 = 0;
parameters.POC[0].compno0 = 0;
parameters.POC[0].layno1 = 1;
parameters.POC[0].resno1 = parameters.numresolution - 1;
parameters.POC[0].compno1 = 3;
parameters.POC[0].prg1 = CPRL;
parameters.POC[1].tile = 1;
parameters.POC[1].resno0 = parameters.numresolution - 1;
parameters.POC[1].compno0 = 0;
parameters.POC[1].layno1 = 1;
parameters.POC[1].resno1 = parameters.numresolution;
parameters.POC[1].compno1 = 3;
parameters.POC[1].prg1 = CPRL;
}
parameters.cp_comment = strdup ("libdcp");
parameters.cp_cinema = fourk ? CINEMA4K_24 : CINEMA2K_24;
/* 3 components, so use MCT */
parameters.tcp_mct = 1;
/* set max image */
parameters.max_comp_size = max_comp_size;
parameters.tcp_rates[0] = ((float) (3 * xyz->size().width * xyz->size().height * 12)) / (max_cs_len * 8);
/* Set event manager to null (openjpeg 1.3 bug) */
cinfo->event_mgr = 0;
/* Setup the encoder parameters using the current image and user parameters */
opj_setup_encoder(cinfo, ¶meters, xyz->opj_image ());
opj_cio_t* cio = opj_cio_open((opj_common_ptr) cinfo, 0, 0);
if (cio == 0) {
opj_destroy_compress (cinfo);
throw MiscError("could not open JPEG2000 stream");
}
int const r = opj_encode(cinfo, cio, xyz->opj_image(), 0);
if (r == 0) {
opj_cio_close (cio);
opj_destroy_compress (cinfo);
throw MiscError("JPEG2000 encoding failed");
}
ArrayData enc(cio->buffer, cio_tell(cio));
opj_cio_close (cio);
free (parameters.cp_comment);
opj_destroy_compress (cinfo);
return enc;
}
|
