/*
- Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ 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.
- This program is distributed in the hope that it will be useful,
+ 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 this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
+ 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 "rgb_xyz.h"
#include "openjpeg_image.h"
-#include "colour_matrix.h"
#include "colour_conversion.h"
#include "transfer_function.h"
#include "dcp_assert.h"
dcp::xyz_to_rgba (
boost::shared_ptr<const OpenJPEGImage> xyz_image,
ColourConversion const & conversion,
- uint8_t* argb
+ uint8_t* argb,
+ int stride
)
{
- int const max_colour = pow (2, 12) - 1;
+ int const max_colour = pow (2, 16) - 1;
struct {
double x, y, z;
double const * lut_out = conversion.in()->lut (16, true);
boost::numeric::ublas::matrix<double> const matrix = conversion.xyz_to_rgb ();
+ double fast_matrix[9] = {
+ matrix (0, 0), matrix (0, 1), matrix (0, 2),
+ matrix (1, 0), matrix (1, 1), matrix (1, 2),
+ matrix (2, 0), matrix (2, 1), matrix (2, 2)
+ };
+
int const height = xyz_image->size().height;
int const width = xyz_image->size().width;
s.z /= DCI_COEFFICIENT;
/* XYZ to RGB */
- d.r = ((s.x * matrix(0, 0)) + (s.y * matrix(0, 1)) + (s.z * matrix(0, 2)));
- d.g = ((s.x * matrix(1, 0)) + (s.y * matrix(1, 1)) + (s.z * matrix(1, 2)));
- d.b = ((s.x * matrix(2, 0)) + (s.y * matrix(2, 1)) + (s.z * matrix(2, 2)));
+ d.r = ((s.x * fast_matrix[0]) + (s.y * fast_matrix[1]) + (s.z * fast_matrix[2]));
+ d.g = ((s.x * fast_matrix[3]) + (s.y * fast_matrix[4]) + (s.z * fast_matrix[5]));
+ d.b = ((s.x * fast_matrix[6]) + (s.y * fast_matrix[7]) + (s.z * fast_matrix[8]));
d.r = min (d.r, 1.0);
d.r = max (d.r, 0.0);
d.b = max (d.b, 0.0);
/* Out gamma LUT */
- *argb_line++ = lut_out[int(rint(d.b * max_colour))] * 0xff;
- *argb_line++ = lut_out[int(rint(d.g * max_colour))] * 0xff;
- *argb_line++ = lut_out[int(rint(d.r * max_colour))] * 0xff;
+ *argb_line++ = lut_out[lrint(d.b * max_colour)] * 0xff;
+ *argb_line++ = lut_out[lrint(d.g * max_colour)] * 0xff;
+ *argb_line++ = lut_out[lrint(d.r * max_colour)] * 0xff;
*argb_line++ = 0xff;
}
- /* 4 bytes per pixel */
- argb += width * 4;
+ argb += stride;
}
}
double const * lut_out = conversion.in()->lut (16, true);
boost::numeric::ublas::matrix<double> const matrix = conversion.xyz_to_rgb ();
- for (int y = 0; y < xyz_image->size().height; ++y) {
+ double fast_matrix[9] = {
+ matrix (0, 0), matrix (0, 1), matrix (0, 2),
+ matrix (1, 0), matrix (1, 1), matrix (1, 2),
+ matrix (2, 0), matrix (2, 1), matrix (2, 2)
+ };
+
+ int const height = xyz_image->size().height;
+ int const width = xyz_image->size().width;
+
+ for (int y = 0; y < height; ++y) {
uint16_t* rgb_line = reinterpret_cast<uint16_t*> (rgb + y * stride);
- for (int x = 0; x < xyz_image->size().width; ++x) {
+ for (int x = 0; x < width; ++x) {
int cx = *xyz_x++;
int cy = *xyz_y++;
s.z /= DCI_COEFFICIENT;
/* XYZ to RGB */
- d.r = ((s.x * matrix(0, 0)) + (s.y * matrix(0, 1)) + (s.z * matrix(0, 2)));
- d.g = ((s.x * matrix(1, 0)) + (s.y * matrix(1, 1)) + (s.z * matrix(1, 2)));
- d.b = ((s.x * matrix(2, 0)) + (s.y * matrix(2, 1)) + (s.z * matrix(2, 2)));
+ d.r = ((s.x * fast_matrix[0]) + (s.y * fast_matrix[1]) + (s.z * fast_matrix[2]));
+ d.g = ((s.x * fast_matrix[3]) + (s.y * fast_matrix[4]) + (s.z * fast_matrix[5]));
+ d.b = ((s.x * fast_matrix[6]) + (s.y * fast_matrix[7]) + (s.z * fast_matrix[8]));
d.r = min (d.r, 1.0);
d.r = max (d.r, 0.0);
d.b = min (d.b, 1.0);
d.b = max (d.b, 0.0);
- *rgb_line++ = rint(lut_out[int(rint(d.r * 65535))] * 65535);
- *rgb_line++ = rint(lut_out[int(rint(d.g * 65535))] * 65535);
- *rgb_line++ = rint(lut_out[int(rint(d.b * 65535))] * 65535);
+ *rgb_line++ = lrint(lut_out[lrint(d.r * 65535)] * 65535);
+ *rgb_line++ = lrint(lut_out[lrint(d.g * 65535)] * 65535);
+ *rgb_line++ = lrint(lut_out[lrint(d.b * 65535)] * 65535);
}
}
}
+/** @param conversion Colour conversion.
+ * @param matrix Filled in with the product of the RGB to XYZ matrix, the Bradford transform and the DCI companding.
+ */
+void
+dcp::combined_rgb_to_xyz (ColourConversion const & conversion, double* matrix)
+{
+ boost::numeric::ublas::matrix<double> const rgb_to_xyz = conversion.rgb_to_xyz ();
+ boost::numeric::ublas::matrix<double> const bradford = conversion.bradford ();
+
+ matrix[0] = (bradford (0, 0) * rgb_to_xyz (0, 0) + bradford (0, 1) * rgb_to_xyz (1, 0) + bradford (0, 2) * rgb_to_xyz (2, 0))
+ * DCI_COEFFICIENT * 65535;
+ matrix[1] = (bradford (0, 0) * rgb_to_xyz (0, 1) + bradford (0, 1) * rgb_to_xyz (1, 1) + bradford (0, 2) * rgb_to_xyz (2, 1))
+ * DCI_COEFFICIENT * 65535;
+ matrix[2] = (bradford (0, 0) * rgb_to_xyz (0, 2) + bradford (0, 1) * rgb_to_xyz (1, 2) + bradford (0, 2) * rgb_to_xyz (2, 2))
+ * DCI_COEFFICIENT * 65535;
+ matrix[3] = (bradford (1, 0) * rgb_to_xyz (0, 0) + bradford (1, 1) * rgb_to_xyz (1, 0) + bradford (1, 2) * rgb_to_xyz (2, 0))
+ * DCI_COEFFICIENT * 65535;
+ matrix[4] = (bradford (1, 0) * rgb_to_xyz (0, 1) + bradford (1, 1) * rgb_to_xyz (1, 1) + bradford (1, 2) * rgb_to_xyz (2, 1))
+ * DCI_COEFFICIENT * 65535;
+ matrix[5] = (bradford (1, 0) * rgb_to_xyz (0, 2) + bradford (1, 1) * rgb_to_xyz (1, 2) + bradford (1, 2) * rgb_to_xyz (2, 2))
+ * DCI_COEFFICIENT * 65535;
+ matrix[6] = (bradford (2, 0) * rgb_to_xyz (0, 0) + bradford (2, 1) * rgb_to_xyz (1, 0) + bradford (2, 2) * rgb_to_xyz (2, 0))
+ * DCI_COEFFICIENT * 65535;
+ matrix[7] = (bradford (2, 0) * rgb_to_xyz (0, 1) + bradford (2, 1) * rgb_to_xyz (1, 1) + bradford (2, 2) * rgb_to_xyz (2, 1))
+ * DCI_COEFFICIENT * 65535;
+ matrix[8] = (bradford (2, 0) * rgb_to_xyz (0, 2) + bradford (2, 1) * rgb_to_xyz (1, 2) + bradford (2, 2) * rgb_to_xyz (2, 2))
+ * DCI_COEFFICIENT * 65535;
+}
+
/** @param rgb RGB data; packed RGB 16:16:16, 48bpp, 16R, 16G, 16B,
* with the 2-byte value for each R/G/B component stored as
* little-endian; i.e. AV_PIX_FMT_RGB48LE.
- * @param size of RGB image in pixels.
- * @param stride of RGB data in pixels.
+ * @param size size of RGB image in pixels.
+ * @param size stride of RGB data in pixels.
*/
shared_ptr<dcp::OpenJPEGImage>
dcp::rgb_to_xyz (
double x, y, z;
} d;
- struct {
- double x, y, z;
- } e;
-
double const * lut_in = conversion.in()->lut (12, false);
double const * lut_out = conversion.out()->lut (16, true);
- boost::numeric::ublas::matrix<double> const rgb_to_xyz = conversion.rgb_to_xyz ();
- boost::numeric::ublas::matrix<double> const bradford = conversion.bradford ();
+
+ /* This is is the product of the RGB to XYZ matrix, the Bradford transform and the DCI companding */
+ double fast_matrix[9];
+ combined_rgb_to_xyz (conversion, fast_matrix);
int clamped = 0;
- int jn = 0;
+ int* xyz_x = xyz->data (0);
+ int* xyz_y = xyz->data (1);
+ int* xyz_z = xyz->data (2);
for (int y = 0; y < size.height; ++y) {
uint16_t const * p = reinterpret_cast<uint16_t const *> (rgb + y * stride);
for (int x = 0; x < size.width; ++x) {
s.g = lut_in[*p++ >> 4];
s.b = lut_in[*p++ >> 4];
- /* RGB to XYZ Matrix */
- d.x = ((s.r * rgb_to_xyz(0, 0)) + (s.g * rgb_to_xyz(0, 1)) + (s.b * rgb_to_xyz(0, 2)));
- d.y = ((s.r * rgb_to_xyz(1, 0)) + (s.g * rgb_to_xyz(1, 1)) + (s.b * rgb_to_xyz(1, 2)));
- d.z = ((s.r * rgb_to_xyz(2, 0)) + (s.g * rgb_to_xyz(2, 1)) + (s.b * rgb_to_xyz(2, 2)));
-
- e.x = ((d.x * bradford(0, 0)) + (d.y * bradford(0, 1)) + (d.z * bradford(0, 2)));
- e.y = ((d.x * bradford(1, 0)) + (d.y * bradford(1, 1)) + (d.z * bradford(1, 2)));
- e.z = ((d.x * bradford(2, 0)) + (d.y * bradford(2, 1)) + (d.z * bradford(2, 2)));
-
- /* DCI companding */
- e.x = e.x * DCI_COEFFICIENT * 65535;
- e.y = e.y * DCI_COEFFICIENT * 65535;
- e.z = e.z * DCI_COEFFICIENT * 65535;
+ /* RGB to XYZ, Bradford transform and DCI companding */
+ d.x = s.r * fast_matrix[0] + s.g * fast_matrix[1] + s.b * fast_matrix[2];
+ d.y = s.r * fast_matrix[3] + s.g * fast_matrix[4] + s.b * fast_matrix[5];
+ d.z = s.r * fast_matrix[6] + s.g * fast_matrix[7] + s.b * fast_matrix[8];
/* Clamp */
- if (e.x < 0 || e.y < 0 || e.z < 0 || e.x > 65535 || e.y > 65535 || e.z > 65535) {
+ if (d.x < 0 || d.y < 0 || d.z < 0 || d.x > 65535 || d.y > 65535 || d.z > 65535) {
++clamped;
}
- e.x = max (0.0, e.x);
- e.y = max (0.0, e.y);
- e.z = max (0.0, e.z);
- e.x = min (65535.0, e.x);
- e.y = min (65535.0, e.y);
- e.z = min (65535.0, e.z);
+ d.x = max (0.0, d.x);
+ d.y = max (0.0, d.y);
+ d.z = max (0.0, d.z);
+ d.x = min (65535.0, d.x);
+ d.y = min (65535.0, d.y);
+ d.z = min (65535.0, d.z);
/* Out gamma LUT */
- xyz->data(0)[jn] = lut_out[int(rint(e.x))] * 4095;
- xyz->data(1)[jn] = lut_out[int(rint(e.y))] * 4095;
- xyz->data(2)[jn] = lut_out[int(rint(e.z))] * 4095;
-
- ++jn;
+ *xyz_x++ = lrint (lut_out[lrint(d.x)] * 4095);
+ *xyz_y++ = lrint (lut_out[lrint(d.y)] * 4095);
+ *xyz_z++ = lrint (lut_out[lrint(d.z)] * 4095);
}
}
return xyz;
}
-
-
-/** @param xyz_16 XYZ image data in packed 16:16:16, 48bpp, 16X, 16Y,
- * 16Z, with the 2-byte value for each X/Y/Z component stored as
- * little-endian.
- */
-shared_ptr<dcp::OpenJPEGImage>
-dcp::xyz_to_xyz (uint8_t const * xyz_16, dcp::Size size, int stride)
-{
- shared_ptr<OpenJPEGImage> xyz_12 (new OpenJPEGImage (size));
-
- int jn = 0;
- for (int y = 0; y < size.height; ++y) {
- uint16_t const * p = reinterpret_cast<uint16_t const *> (xyz_16 + y * stride);
- for (int x = 0; x < size.width; ++x) {
- /* Truncate 16-bit to 12-bit */
- xyz_12->data(0)[jn] = *p++ >> 4;
- xyz_12->data(1)[jn] = *p++ >> 4;
- xyz_12->data(2)[jn] = *p++ >> 4;
- ++jn;
- }
- }
-
- return xyz_12;
-}
projects / libdcp.git / blobdiff