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"
31 using boost::shared_ptr;
34 #define DCI_COEFFICIENT (48.0 / 52.37)
36 /** Convert an openjpeg XYZ image to RGBA.
37 * @param xyz_frame Frame in XYZ.
42 boost::shared_ptr<const XYZFrame> xyz_frame,
43 ColourConversion const & conversion
46 int const max_colour = pow (2, 12) - 1;
56 int* xyz_x = xyz_frame->data (0);
57 int* xyz_y = xyz_frame->data (1);
58 int* xyz_z = xyz_frame->data (2);
60 shared_ptr<ARGBFrame> argb_frame (new ARGBFrame (xyz_frame->size ()));
61 uint8_t* argb = argb_frame->data ();
63 float const * lut_in = conversion.in()->lut (16);
64 float const * lut_out = conversion.out()->lut (12);
65 boost::numeric::ublas::matrix<double> matrix = conversion.matrix ();
67 for (int y = 0; y < xyz_frame->size().height; ++y) {
68 uint8_t* argb_line = argb;
69 for (int x = 0; x < xyz_frame->size().width; ++x) {
71 assert (*xyz_x >= 0 && *xyz_y >= 0 && *xyz_z >= 0 && *xyz_x < 4096 && *xyz_y < 4096 && *xyz_z < 4096);
74 s.x = lut_in[*xyz_x++];
75 s.y = lut_in[*xyz_y++];
76 s.z = lut_in[*xyz_z++];
79 s.x /= DCI_COEFFICIENT;
80 s.y /= DCI_COEFFICIENT;
81 s.z /= DCI_COEFFICIENT;
84 d.r = ((s.x * matrix(0, 0)) + (s.y * matrix(0, 1)) + (s.z * matrix(0, 2)));
85 d.g = ((s.x * matrix(1, 0)) + (s.y * matrix(1, 1)) + (s.z * matrix(1, 2)));
86 d.b = ((s.x * matrix(2, 0)) + (s.y * matrix(2, 1)) + (s.z * matrix(2, 2)));
98 *argb_line++ = lut_out[(int) (d.b * max_colour)] * 0xff;
99 *argb_line++ = lut_out[(int) (d.g * max_colour)] * 0xff;
100 *argb_line++ = lut_out[(int) (d.r * max_colour)] * 0xff;
104 argb += argb_frame->stride ();
110 /** Convert an openjpeg XYZ image to RGB.
111 * @param xyz_frame Frame in XYZ.
112 * @param lut_in Input Gamma LUT to use.
113 * @param lut_out Output Gamma LUT to use.
114 * @param buffer Buffer to write RGB data to; will be written
115 * as one byte R, one byte G, one byte B, one byte R etc. with
116 * no padding at line ends.
120 boost::shared_ptr<const XYZFrame> xyz_frame,
121 ColourConversion const & conversion,
125 int const max_colour = pow (2, 12) - 1;
135 int* xyz_x = xyz_frame->data (0);
136 int* xyz_y = xyz_frame->data (1);
137 int* xyz_z = xyz_frame->data (2);
139 float const * lut_in = conversion.in()->lut (16);
140 float const * lut_out = conversion.out()->lut (12);
141 boost::numeric::ublas::matrix<double> matrix = conversion.matrix ();
143 for (int y = 0; y < xyz_frame->size().height; ++y) {
144 uint8_t* buffer_line = buffer;
145 for (int x = 0; x < xyz_frame->size().width; ++x) {
147 assert (*xyz_x >= 0 && *xyz_y >= 0 && *xyz_z >= 0 && *xyz_x < 4096 && *xyz_y < 4096 && *xyz_z < 4096);
150 s.x = lut_in[*xyz_x++];
151 s.y = lut_in[*xyz_y++];
152 s.z = lut_in[*xyz_z++];
155 s.x /= DCI_COEFFICIENT;
156 s.y /= DCI_COEFFICIENT;
157 s.z /= DCI_COEFFICIENT;
160 d.r = ((s.x * matrix(0, 0)) + (s.y * matrix(0, 1)) + (s.z * matrix(0, 2)));
161 d.g = ((s.x * matrix(1, 0)) + (s.y * matrix(1, 1)) + (s.z * matrix(1, 2)));
162 d.b = ((s.x * matrix(2, 0)) + (s.y * matrix(2, 1)) + (s.z * matrix(2, 2)));
164 d.r = min (d.r, 1.0);
165 d.r = max (d.r, 0.0);
167 d.g = min (d.g, 1.0);
168 d.g = max (d.g, 0.0);
170 d.b = min (d.b, 1.0);
171 d.b = max (d.b, 0.0);
174 *buffer_line++ = lut_out[(int) (d.r * max_colour)] * 0xff;
175 *buffer_line++ = lut_out[(int) (d.g * max_colour)] * 0xff;
176 *buffer_line++ = lut_out[(int) (d.b * max_colour)] * 0xff;
179 buffer += xyz_frame->size().width * 3;
183 /** 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;
184 * i.e. AV_PIX_FMT_RGB48LE.
186 shared_ptr<dcp::XYZFrame>
188 boost::shared_ptr<const Image> rgb,
189 ColourConversion const & conversion
192 shared_ptr<XYZFrame> xyz (new XYZFrame (rgb->size ()));
202 float const * lut_in = conversion.in()->lut (12);
203 float const * lut_out = conversion.out()->lut (16);
204 boost::numeric::ublas::matrix<double> matrix = conversion.matrix ();
207 for (int y = 0; y < rgb->size().height; ++y) {
208 uint16_t* p = reinterpret_cast<uint16_t *> (rgb->data()[0] + y * rgb->stride()[0]);
209 for (int x = 0; x < rgb->size().width; ++x) {
211 /* In gamma LUT (converting 16-bit to 12-bit) */
212 s.r = lut_in[*p++ >> 4];
213 s.g = lut_in[*p++ >> 4];
214 s.b = lut_in[*p++ >> 4];
216 /* RGB to XYZ Matrix */
217 d.x = ((s.r * matrix(0, 0)) + (s.g * matrix(0, 1)) + (s.b * matrix(0, 2)));
218 d.y = ((s.r * matrix(1, 0)) + (s.g * matrix(1, 1)) + (s.b * matrix(1, 2)));
219 d.z = ((s.r * matrix(2, 0)) + (s.g * matrix(2, 1)) + (s.b * matrix(2, 2)));
222 d.x = d.x * DCI_COEFFICIENT * 65535;
223 d.y = d.y * DCI_COEFFICIENT * 65535;
224 d.z = d.z * DCI_COEFFICIENT * 65535;
226 assert (d.x >= 0 && d.x < 65536);
227 assert (d.y >= 0 && d.y < 65536);
228 assert (d.z >= 0 && d.z < 65536);
231 xyz->data(0)[jn] = lut_out[(int) d.x] * 4096;
232 xyz->data(1)[jn] = lut_out[(int) d.y] * 4096;
233 xyz->data(2)[jn] = lut_out[(int) d.z] * 4096;
243 /** 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;
244 * i.e. AV_PIX_FMT_RGB48LE.
246 shared_ptr<dcp::XYZFrame>
247 dcp::xyz_to_xyz (shared_ptr<const Image> xyz_16)
249 shared_ptr<XYZFrame> xyz_12 (new XYZFrame (xyz_16->size ()));
252 for (int y = 0; y < xyz_16->size().height; ++y) {
253 uint16_t* p = reinterpret_cast<uint16_t *> (xyz_16->data()[0] + y * xyz_16->stride()[0]);
254 for (int x = 0; x < xyz_16->size().width; ++x) {
255 /* Truncate 16-bit to 12-bit */
256 xyz_12->data(0)[jn] = *p++ >> 4;
257 xyz_12->data(1)[jn] = *p++ >> 4;
258 xyz_12->data(2)[jn] = *p++ >> 4;