2 Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include "argb_frame.h"
22 #include "xyz_frame.h"
24 #include "colour_matrix.h"
25 #include "colour_conversion.h"
26 #include "transfer_function.h"
27 #include "dcp_assert.h"
32 using boost::shared_ptr;
35 #define DCI_COEFFICIENT (48.0 / 52.37)
37 /** Convert an openjpeg XYZ image to RGBA.
38 * @param xyz_frame Frame in XYZ.
43 boost::shared_ptr<const XYZFrame> xyz_frame,
44 ColourConversion const & conversion
47 int const max_colour = pow (2, 12) - 1;
57 int* xyz_x = xyz_frame->data (0);
58 int* xyz_y = xyz_frame->data (1);
59 int* xyz_z = xyz_frame->data (2);
61 shared_ptr<ARGBFrame> argb_frame (new ARGBFrame (xyz_frame->size ()));
62 uint8_t* argb = argb_frame->data ();
64 float const * lut_in = conversion.in()->lut (16);
65 float const * lut_out = conversion.out()->lut (12);
66 boost::numeric::ublas::matrix<double> matrix = conversion.matrix ();
68 for (int y = 0; y < xyz_frame->size().height; ++y) {
69 uint8_t* argb_line = argb;
70 for (int x = 0; x < xyz_frame->size().width; ++x) {
72 DCP_ASSERT (*xyz_x >= 0 && *xyz_y >= 0 && *xyz_z >= 0 && *xyz_x < 4096 && *xyz_y < 4096 && *xyz_z < 4096);
75 s.x = lut_in[*xyz_x++];
76 s.y = lut_in[*xyz_y++];
77 s.z = lut_in[*xyz_z++];
80 s.x /= DCI_COEFFICIENT;
81 s.y /= DCI_COEFFICIENT;
82 s.z /= DCI_COEFFICIENT;
85 d.r = ((s.x * matrix(0, 0)) + (s.y * matrix(0, 1)) + (s.z * matrix(0, 2)));
86 d.g = ((s.x * matrix(1, 0)) + (s.y * matrix(1, 1)) + (s.z * matrix(1, 2)));
87 d.b = ((s.x * matrix(2, 0)) + (s.y * matrix(2, 1)) + (s.z * matrix(2, 2)));
99 *argb_line++ = lut_out[(int) (d.b * max_colour)] * 0xff;
100 *argb_line++ = lut_out[(int) (d.g * max_colour)] * 0xff;
101 *argb_line++ = lut_out[(int) (d.r * max_colour)] * 0xff;
105 argb += argb_frame->stride ();
111 /** Convert an openjpeg XYZ image to RGB.
112 * @param xyz_frame Frame in XYZ.
113 * @param lut_in Input Gamma LUT to use.
114 * @param lut_out Output Gamma LUT to use.
115 * @param buffer Buffer to write RGB data to; will be written
116 * as one byte R, one byte G, one byte B, one byte R etc. with
117 * no padding at line ends.
121 boost::shared_ptr<const XYZFrame> xyz_frame,
122 ColourConversion const & conversion,
126 int const max_colour = pow (2, 12) - 1;
136 int* xyz_x = xyz_frame->data (0);
137 int* xyz_y = xyz_frame->data (1);
138 int* xyz_z = xyz_frame->data (2);
140 float const * lut_in = conversion.in()->lut (16);
141 float const * lut_out = conversion.out()->lut (12);
142 boost::numeric::ublas::matrix<double> matrix = conversion.matrix ();
144 for (int y = 0; y < xyz_frame->size().height; ++y) {
145 uint8_t* buffer_line = buffer;
146 for (int x = 0; x < xyz_frame->size().width; ++x) {
148 DCP_ASSERT (*xyz_x >= 0 && *xyz_y >= 0 && *xyz_z >= 0 && *xyz_x < 4096 && *xyz_y < 4096 && *xyz_z < 4096);
151 s.x = lut_in[*xyz_x++];
152 s.y = lut_in[*xyz_y++];
153 s.z = lut_in[*xyz_z++];
156 s.x /= DCI_COEFFICIENT;
157 s.y /= DCI_COEFFICIENT;
158 s.z /= DCI_COEFFICIENT;
161 d.r = ((s.x * matrix(0, 0)) + (s.y * matrix(0, 1)) + (s.z * matrix(0, 2)));
162 d.g = ((s.x * matrix(1, 0)) + (s.y * matrix(1, 1)) + (s.z * matrix(1, 2)));
163 d.b = ((s.x * matrix(2, 0)) + (s.y * matrix(2, 1)) + (s.z * matrix(2, 2)));
165 d.r = min (d.r, 1.0);
166 d.r = max (d.r, 0.0);
168 d.g = min (d.g, 1.0);
169 d.g = max (d.g, 0.0);
171 d.b = min (d.b, 1.0);
172 d.b = max (d.b, 0.0);
175 *buffer_line++ = lut_out[(int) (d.r * max_colour)] * 0xff;
176 *buffer_line++ = lut_out[(int) (d.g * max_colour)] * 0xff;
177 *buffer_line++ = lut_out[(int) (d.b * max_colour)] * 0xff;
180 buffer += xyz_frame->size().width * 3;
184 /** rgb must be packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, with the 2-byte value for each R/G/B component stored as little-endian;
185 * i.e. AV_PIX_FMT_RGB48LE.
187 shared_ptr<dcp::XYZFrame>
189 boost::shared_ptr<const Image> rgb,
190 ColourConversion const & conversion
193 shared_ptr<XYZFrame> xyz (new XYZFrame (rgb->size ()));
203 float const * lut_in = conversion.in()->lut (12);
204 float const * lut_out = conversion.out()->lut (16);
205 boost::numeric::ublas::matrix<double> matrix = conversion.matrix ();
208 for (int y = 0; y < rgb->size().height; ++y) {
209 uint16_t* p = reinterpret_cast<uint16_t *> (rgb->data()[0] + y * rgb->stride()[0]);
210 for (int x = 0; x < rgb->size().width; ++x) {
212 /* In gamma LUT (converting 16-bit to 12-bit) */
213 s.r = lut_in[*p++ >> 4];
214 s.g = lut_in[*p++ >> 4];
215 s.b = lut_in[*p++ >> 4];
217 /* RGB to XYZ Matrix */
218 d.x = ((s.r * matrix(0, 0)) + (s.g * matrix(0, 1)) + (s.b * matrix(0, 2)));
219 d.y = ((s.r * matrix(1, 0)) + (s.g * matrix(1, 1)) + (s.b * matrix(1, 2)));
220 d.z = ((s.r * matrix(2, 0)) + (s.g * matrix(2, 1)) + (s.b * matrix(2, 2)));
223 d.x = d.x * DCI_COEFFICIENT * 65535;
224 d.y = d.y * DCI_COEFFICIENT * 65535;
225 d.z = d.z * DCI_COEFFICIENT * 65535;
227 DCP_ASSERT (d.x >= 0 && d.x < 65536);
228 DCP_ASSERT (d.y >= 0 && d.y < 65536);
229 DCP_ASSERT (d.z >= 0 && d.z < 65536);
232 xyz->data(0)[jn] = lut_out[(int) d.x] * 4096;
233 xyz->data(1)[jn] = lut_out[(int) d.y] * 4096;
234 xyz->data(2)[jn] = lut_out[(int) d.z] * 4096;
244 /** Image must be packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, with the 2-byte value for each R/G/B component stored as little-endian;
245 * i.e. AV_PIX_FMT_RGB48LE.
247 shared_ptr<dcp::XYZFrame>
248 dcp::xyz_to_xyz (shared_ptr<const Image> xyz_16)
250 shared_ptr<XYZFrame> xyz_12 (new XYZFrame (xyz_16->size ()));
253 for (int y = 0; y < xyz_16->size().height; ++y) {
254 uint16_t* p = reinterpret_cast<uint16_t *> (xyz_16->data()[0] + y * xyz_16->stride()[0]);
255 for (int x = 0; x < xyz_16->size().width; ++x) {
256 /* Truncate 16-bit to 12-bit */
257 xyz_12->data(0)[jn] = *p++ >> 4;
258 xyz_12->data(1)[jn] = *p++ >> 4;
259 xyz_12->data(2)[jn] = *p++ >> 4;