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 double const * lut_in = conversion.in()->lut (16);
65 double 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(rint(d.b * max_colour))] * 0xff;
100 *argb_line++ = lut_out[int(rint(d.g * max_colour))] * 0xff;
101 *argb_line++ = lut_out[int(rint(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 conversion Colour conversion to use.
114 * @param buffer Buffer to write RGB data to; rgb will be packed RGB
115 * 16:16:16, 48bpp, 16R, 16G, 16B, with the 2-byte value for each
116 * R/G/B component stored as little-endian; i.e. AV_PIX_FMT_RGB48LE.
120 boost::shared_ptr<const XYZFrame> xyz_frame,
121 ColourConversion const & conversion,
133 /* These should be 12-bit values from 0-4095 */
134 int* xyz_x = xyz_frame->data (0);
135 int* xyz_y = xyz_frame->data (1);
136 int* xyz_z = xyz_frame->data (2);
138 double const * lut_in = conversion.in()->lut (12);
139 double const * lut_out = conversion.out()->lut (16);
140 boost::numeric::ublas::matrix<double> matrix = conversion.matrix ();
142 for (int y = 0; y < xyz_frame->size().height; ++y) {
143 uint16_t* buffer_line = buffer;
144 for (int x = 0; x < xyz_frame->size().width; ++x) {
146 DCP_ASSERT (*xyz_x >= 0 && *xyz_y >= 0 && *xyz_z >= 0 && *xyz_x < 4096 && *xyz_y < 4096 && *xyz_z < 4096);
149 s.x = lut_in[*xyz_x++];
150 s.y = lut_in[*xyz_y++];
151 s.z = lut_in[*xyz_z++];
154 s.x /= DCI_COEFFICIENT;
155 s.y /= DCI_COEFFICIENT;
156 s.z /= DCI_COEFFICIENT;
159 d.r = ((s.x * matrix(0, 0)) + (s.y * matrix(0, 1)) + (s.z * matrix(0, 2)));
160 d.g = ((s.x * matrix(1, 0)) + (s.y * matrix(1, 1)) + (s.z * matrix(1, 2)));
161 d.b = ((s.x * matrix(2, 0)) + (s.y * matrix(2, 1)) + (s.z * matrix(2, 2)));
163 d.r = min (d.r, 1.0);
164 d.r = max (d.r, 0.0);
166 d.g = min (d.g, 1.0);
167 d.g = max (d.g, 0.0);
169 d.b = min (d.b, 1.0);
170 d.b = max (d.b, 0.0);
172 *buffer_line++ = rint(lut_out[int(rint(d.r * 65535))] * 65535);
173 *buffer_line++ = rint(lut_out[int(rint(d.g * 65535))] * 65535);
174 *buffer_line++ = rint(lut_out[int(rint(d.b * 65535))] * 65535);
177 buffer += xyz_frame->size().width * 3;
181 /** 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;
182 * i.e. AV_PIX_FMT_RGB48LE.
184 shared_ptr<dcp::XYZFrame>
186 boost::shared_ptr<const Image> rgb,
187 ColourConversion const & conversion
190 shared_ptr<XYZFrame> xyz (new XYZFrame (rgb->size ()));
200 double const * lut_in = conversion.in()->lut (12);
201 double const * lut_out = conversion.out()->lut (16);
202 boost::numeric::ublas::matrix<double> matrix = conversion.matrix ();
205 for (int y = 0; y < rgb->size().height; ++y) {
206 uint16_t* p = reinterpret_cast<uint16_t*> (rgb->data()[0] + y * rgb->stride()[0]);
207 for (int x = 0; x < rgb->size().width; ++x) {
209 /* In gamma LUT (converting 16-bit to 12-bit) */
210 s.r = lut_in[*p++ >> 4];
211 s.g = lut_in[*p++ >> 4];
212 s.b = lut_in[*p++ >> 4];
214 /* RGB to XYZ Matrix */
215 d.x = ((s.r * matrix(0, 0)) + (s.g * matrix(0, 1)) + (s.b * matrix(0, 2)));
216 d.y = ((s.r * matrix(1, 0)) + (s.g * matrix(1, 1)) + (s.b * matrix(1, 2)));
217 d.z = ((s.r * matrix(2, 0)) + (s.g * matrix(2, 1)) + (s.b * matrix(2, 2)));
220 d.x = d.x * DCI_COEFFICIENT * 65535;
221 d.y = d.y * DCI_COEFFICIENT * 65535;
222 d.z = d.z * DCI_COEFFICIENT * 65535;
224 DCP_ASSERT (d.x >= 0 && d.x < 65536);
225 DCP_ASSERT (d.y >= 0 && d.y < 65536);
226 DCP_ASSERT (d.z >= 0 && d.z < 65536);
229 xyz->data(0)[jn] = lut_out[int(rint(d.x))] * 4095;
230 xyz->data(1)[jn] = lut_out[int(rint(d.y))] * 4095;
231 xyz->data(2)[jn] = lut_out[int(rint(d.z))] * 4095;
241 /** 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;
242 * i.e. AV_PIX_FMT_RGB48LE.
244 shared_ptr<dcp::XYZFrame>
245 dcp::xyz_to_xyz (shared_ptr<const Image> xyz_16)
247 shared_ptr<XYZFrame> xyz_12 (new XYZFrame (xyz_16->size ()));
250 for (int y = 0; y < xyz_16->size().height; ++y) {
251 uint16_t* p = reinterpret_cast<uint16_t*> (xyz_16->data()[0] + y * xyz_16->stride()[0]);
252 for (int x = 0; x < xyz_16->size().width; ++x) {
253 /* Truncate 16-bit to 12-bit */
254 xyz_12->data(0)[jn] = *p++ >> 4;
255 xyz_12->data(1)[jn] = *p++ >> 4;
256 xyz_12->data(2)[jn] = *p++ >> 4;