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29edc0c6a5
Remove hardcoded color matrices and compute the matrices using the cms helper library that was in cogcolorspace before.
573 lines
13 KiB
C
573 lines
13 KiB
C
/* GStreamer
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* Copyright (C) 2008 David Schleef <ds@entropywave.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gst/math-compat.h>
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#include "gstcms.h"
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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/* our simple CMS */
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void
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color_xyY_to_XYZ (Color * c)
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{
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if (c->v[1] == 0) {
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c->v[0] = 0;
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c->v[1] = 0;
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c->v[2] = 0;
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} else {
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double X, Y, Z;
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X = c->v[0] * c->v[2] / c->v[1];
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Y = c->v[2];
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Z = (1.0 - c->v[0] - c->v[1]) * c->v[2] / c->v[1];
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c->v[0] = X;
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c->v[1] = Y;
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c->v[2] = Z;
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}
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}
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void
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color_XYZ_to_xyY (Color * c)
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{
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double d;
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d = c->v[0] + c->v[1] + c->v[2];
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if (d == 0) {
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c->v[0] = 0.3128;
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c->v[1] = 0.3290;
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c->v[2] = 0;
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} else {
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double x, y, Y;
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x = c->v[0] / d;
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y = c->v[1] / d;
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Y = c->v[1];
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c->v[0] = x;
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c->v[1] = y;
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c->v[2] = Y;
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}
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}
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void
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color_set (Color * c, double x, double y, double z)
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{
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c->v[0] = x;
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c->v[1] = y;
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c->v[2] = z;
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}
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void
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color_matrix_set_identity (ColorMatrix * m)
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{
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int i, j;
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for (i = 0; i < 4; i++) {
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for (j = 0; j < 4; j++) {
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m->m[i][j] = (i == j);
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}
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}
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}
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/* Prettyprint a 4x4 matrix @m@ */
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void
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color_matrix_dump (ColorMatrix * m)
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{
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int i, j;
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printf ("[\n");
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for (i = 0; i < 4; i++) {
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printf (" ");
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for (j = 0; j < 4; j++) {
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printf (" %8.5g", m->m[i][j]);
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}
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printf ("\n");
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}
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printf ("]\n");
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}
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/* Perform 4x4 matrix multiplication:
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* - @dst@ = @a@ * @b@
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* - @dst@ may be a pointer to @a@ andor @b@
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*/
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void
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color_matrix_multiply (ColorMatrix * dst, ColorMatrix * a, ColorMatrix * b)
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{
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ColorMatrix tmp;
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int i, j, k;
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for (i = 0; i < 4; i++) {
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for (j = 0; j < 4; j++) {
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double x = 0;
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for (k = 0; k < 4; k++) {
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x += a->m[i][k] * b->m[k][j];
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}
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tmp.m[i][j] = x;
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}
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}
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memcpy (dst, &tmp, sizeof (ColorMatrix));
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}
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void
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color_matrix_apply (ColorMatrix * m, Color * dest, Color * src)
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{
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int i;
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Color tmp;
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for (i = 0; i < 3; i++) {
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double x = 0;
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x += m->m[i][0] * src->v[0];
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x += m->m[i][1] * src->v[1];
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x += m->m[i][2] * src->v[2];
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x += m->m[i][3];
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tmp.v[i] = x;
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}
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memcpy (dest, &tmp, sizeof (tmp));
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}
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void
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color_matrix_offset_components (ColorMatrix * m, double a1, double a2,
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double a3)
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{
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ColorMatrix a;
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color_matrix_set_identity (&a);
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a.m[0][3] = a1;
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a.m[1][3] = a2;
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a.m[2][3] = a3;
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color_matrix_multiply (m, &a, m);
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}
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void
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color_matrix_scale_components (ColorMatrix * m, double a1, double a2, double a3)
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{
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ColorMatrix a;
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color_matrix_set_identity (&a);
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a.m[0][0] = a1;
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a.m[1][1] = a2;
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a.m[2][2] = a3;
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color_matrix_multiply (m, &a, m);
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}
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void
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color_matrix_YCbCr_to_RGB (ColorMatrix * m, double Kr, double Kb)
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{
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double Kg = 1.0 - Kr - Kb;
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ColorMatrix k = {
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{
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{1., 0., 2 * (1 - Kr), 0.},
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{1., -2 * Kb * (1 - Kb) / Kg, -2 * Kr * (1 - Kr) / Kg, 0.},
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{1., 2 * (1 - Kb), 0., 0.},
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{0., 0., 0., 1.},
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}
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};
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color_matrix_multiply (m, &k, m);
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}
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void
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color_matrix_RGB_to_YCbCr (ColorMatrix * m, double Kr, double Kb)
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{
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double Kg = 1.0 - Kr - Kb;
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ColorMatrix k;
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double x;
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k.m[0][0] = Kr;
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k.m[0][1] = Kg;
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k.m[0][2] = Kb;
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k.m[0][3] = 0;
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x = 1 / (2 * (1 - Kb));
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k.m[1][0] = -x * Kr;
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k.m[1][1] = -x * Kg;
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k.m[1][2] = x * (1 - Kb);
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k.m[1][3] = 0;
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x = 1 / (2 * (1 - Kr));
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k.m[2][0] = x * (1 - Kr);
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k.m[2][1] = -x * Kg;
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k.m[2][2] = -x * Kb;
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k.m[2][3] = 0;
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k.m[3][0] = 0;
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k.m[3][1] = 0;
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k.m[3][2] = 0;
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k.m[3][3] = 1;
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color_matrix_multiply (m, &k, m);
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}
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void
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color_matrix_build_yuv_to_rgb_601 (ColorMatrix * dst)
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{
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/*
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* At this point, everything is in YCbCr
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* All components are in the range [0,255]
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*/
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color_matrix_set_identity (dst);
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/* offset required to get input video black to (0.,0.,0.) */
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color_matrix_offset_components (dst, -16, -128, -128);
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/* scale required to get input video black to (0.,0.,0.) */
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color_matrix_scale_components (dst, (1 / 219.0), (1 / 224.0), (1 / 224.0));
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/* colour matrix, YCbCr -> RGB */
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/* Requires Y in [0,1.0], Cb&Cr in [-0.5,0.5] */
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color_matrix_YCbCr_to_RGB (dst, 0.2990, 0.1140); /* SD */
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/*
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* We are now in RGB space
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*/
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#if 0
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/* scale to output range. */
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color_matrix_scale_components (dst, 255.0, 255.0, 255.0);
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#endif
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}
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void
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color_matrix_build_bt709_to_bt601 (ColorMatrix * dst)
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{
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color_matrix_set_identity (dst);
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/* offset required to get input video black to (0.,0.,0.) */
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color_matrix_offset_components (dst, -16, -128, -128);
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/* scale required to get input video black to (0.,0.,0.) */
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color_matrix_scale_components (dst, (1 / 219.0), (1 / 224.0), (1 / 224.0));
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/* colour matrix, YCbCr -> RGB */
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/* Requires Y in [0,1.0], Cb&Cr in [-0.5,0.5] */
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color_matrix_YCbCr_to_RGB (dst, 0.2126, 0.0722); /* HD */
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color_matrix_RGB_to_YCbCr (dst, 0.2990, 0.1140); /* SD */
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color_matrix_scale_components (dst, 219.0, 224.0, 224.0);
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color_matrix_offset_components (dst, 16, 128, 128);
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}
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void
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color_matrix_build_rgb_to_yuv_601 (ColorMatrix * dst)
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{
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color_matrix_set_identity (dst);
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color_matrix_RGB_to_YCbCr (dst, 0.2990, 0.1140); /* SD */
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color_matrix_scale_components (dst, 219.0, 224.0, 224.0);
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color_matrix_offset_components (dst, 16, 128, 128);
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{
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Color c;
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int i;
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for (i = 7; i >= 0; i--) {
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color_set (&c, (i & 2) ? 0.75 : 0.0, (i & 4) ? 0.75 : 0.0,
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(i & 1) ? 0.75 : 0.0);
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color_matrix_apply (dst, &c, &c);
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g_print (" { %g, %g, %g },\n", rint (c.v[0]), rint (c.v[1]),
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rint (c.v[2]));
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}
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color_set (&c, -0.075, -0.075, -0.075);
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color_matrix_apply (dst, &c, &c);
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g_print (" { %g, %g, %g },\n", rint (c.v[0]), rint (c.v[1]),
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rint (c.v[2]));
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color_set (&c, 0.075, 0.075, 0.075);
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color_matrix_apply (dst, &c, &c);
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g_print (" { %g, %g, %g },\n", rint (c.v[0]), rint (c.v[1]),
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rint (c.v[2]));
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}
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}
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void
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color_matrix_invert (ColorMatrix * m)
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{
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ColorMatrix tmp;
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int i, j;
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double det;
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color_matrix_set_identity (&tmp);
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for (j = 0; j < 3; j++) {
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for (i = 0; i < 3; i++) {
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tmp.m[j][i] =
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m->m[(i + 1) % 3][(j + 1) % 3] * m->m[(i + 2) % 3][(j + 2) % 3] -
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m->m[(i + 1) % 3][(j + 2) % 3] * m->m[(i + 2) % 3][(j + 1) % 3];
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}
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}
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det =
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tmp.m[0][0] * m->m[0][0] + tmp.m[0][1] * m->m[1][0] +
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tmp.m[0][2] * m->m[2][0];
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for (j = 0; j < 3; j++) {
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for (i = 0; i < 3; i++) {
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tmp.m[i][j] /= det;
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}
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}
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memcpy (m, &tmp, sizeof (tmp));
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}
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void
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color_matrix_copy (ColorMatrix * dest, ColorMatrix * src)
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{
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memcpy (dest, src, sizeof (ColorMatrix));
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}
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void
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color_matrix_transpose (ColorMatrix * m)
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{
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int i, j;
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ColorMatrix tmp;
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color_matrix_set_identity (&tmp);
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for (i = 0; i < 3; i++) {
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for (j = 0; j < 3; j++) {
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tmp.m[i][j] = m->m[j][i];
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}
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}
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memcpy (m, &tmp, sizeof (ColorMatrix));
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}
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void
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color_matrix_build_XYZ (ColorMatrix * dst,
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double rx, double ry,
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double gx, double gy, double bx, double by, double wx, double wy)
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{
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Color r, g, b, w, scale;
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ColorMatrix m;
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color_set (&r, rx, ry, 1.0);
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color_xyY_to_XYZ (&r);
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color_set (&g, gx, gy, 1.0);
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color_xyY_to_XYZ (&g);
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color_set (&b, bx, by, 1.0);
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color_xyY_to_XYZ (&b);
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color_set (&w, wx, wy, 1.0);
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color_xyY_to_XYZ (&w);
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color_matrix_set_identity (dst);
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dst->m[0][0] = r.v[0];
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dst->m[0][1] = r.v[1];
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dst->m[0][2] = r.v[2];
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dst->m[1][0] = g.v[0];
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dst->m[1][1] = g.v[1];
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dst->m[1][2] = g.v[2];
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dst->m[2][0] = b.v[0];
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dst->m[2][1] = b.v[1];
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dst->m[2][2] = b.v[2];
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color_matrix_dump (dst);
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color_matrix_copy (&m, dst);
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color_matrix_invert (&m);
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color_matrix_dump (&m);
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color_matrix_transpose (&m);
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color_matrix_apply (&m, &scale, &w);
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g_print ("%g %g %g\n", scale.v[0], scale.v[1], scale.v[2]);
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dst->m[0][0] = r.v[0] * scale.v[0];
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dst->m[0][1] = r.v[1] * scale.v[0];
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dst->m[0][2] = r.v[2] * scale.v[0];
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dst->m[1][0] = g.v[0] * scale.v[1];
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dst->m[1][1] = g.v[1] * scale.v[1];
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dst->m[1][2] = g.v[2] * scale.v[1];
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dst->m[2][0] = b.v[0] * scale.v[2];
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dst->m[2][1] = b.v[1] * scale.v[2];
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dst->m[2][2] = b.v[2] * scale.v[2];
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color_matrix_transpose (dst);
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color_matrix_dump (dst);
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color_set (&scale, 1, 1, 1);
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color_matrix_apply (dst, &scale, &scale);
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color_XYZ_to_xyY (&scale);
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g_print ("white %g %g %g\n", scale.v[0], scale.v[1], scale.v[2]);
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}
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void
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color_matrix_build_rgb_to_XYZ_601 (ColorMatrix * dst)
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{
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/* SMPTE C primaries, SMPTE 170M-2004 */
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color_matrix_build_XYZ (dst,
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0.630, 0.340, 0.310, 0.595, 0.155, 0.070, 0.3127, 0.3290);
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#if 0
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/* NTSC 1953 primaries, SMPTE 170M-2004 */
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color_matrix_build_XYZ (dst,
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0.67, 0.33, 0.21, 0.71, 0.14, 0.08, 0.3127, 0.3290);
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#endif
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}
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void
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color_matrix_build_XYZ_to_rgb_709 (ColorMatrix * dst)
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{
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/* Rec. ITU-R BT.709-5 */
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color_matrix_build_XYZ (dst,
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0.640, 0.330, 0.300, 0.600, 0.150, 0.060, 0.3127, 0.3290);
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}
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void
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color_matrix_build_XYZ_to_rgb_dell (ColorMatrix * dst)
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{
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/* Dell monitor */
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#if 1
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color_matrix_build_XYZ (dst,
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0.662, 0.329, 0.205, 0.683, 0.146, 0.077, 0.3135, 0.3290);
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#endif
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#if 0
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color_matrix_build_XYZ (dst,
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0.630, 0.340, 0.310, 0.595, 0.155, 0.070, 0.3127, 0.3290);
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#endif
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color_matrix_invert (dst);
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}
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void
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color_transfer_function_apply (Color * dest, Color * src)
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{
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int i;
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for (i = 0; i < 3; i++) {
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if (src->v[i] < 0.0812) {
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dest->v[i] = src->v[i] / 4.500;
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} else {
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dest->v[i] = pow (src->v[i] + 0.099, 1 / 0.4500);
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}
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}
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}
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void
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color_transfer_function_unapply (Color * dest, Color * src)
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{
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int i;
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for (i = 0; i < 3; i++) {
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if (src->v[i] < 0.0812 / 4.500) {
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dest->v[i] = src->v[i] * 4.500;
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} else {
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dest->v[i] = pow (src->v[i], 0.4500) - 0.099;
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}
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}
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}
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void
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color_gamut_clamp (Color * dest, Color * src)
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{
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dest->v[0] = CLAMP (src->v[0], 0.0, 1.0);
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dest->v[1] = CLAMP (src->v[1], 0.0, 1.0);
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dest->v[2] = CLAMP (src->v[2], 0.0, 1.0);
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}
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#if 0
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static guint8 *
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get_color_transform_table (void)
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{
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static guint8 *color_transform_table = NULL;
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#if 1
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if (!color_transform_table) {
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ColorMatrix bt601_to_rgb;
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ColorMatrix bt601_to_yuv;
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ColorMatrix bt601_rgb_to_XYZ;
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ColorMatrix dell_XYZ_to_rgb;
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guint8 *table_y;
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guint8 *table_u;
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guint8 *table_v;
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int y, u, v;
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color_matrix_build_yuv_to_rgb_601 (&bt601_to_rgb);
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color_matrix_build_rgb_to_yuv_601 (&bt601_to_yuv);
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color_matrix_build_rgb_to_XYZ_601 (&bt601_rgb_to_XYZ);
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color_matrix_build_XYZ_to_rgb_dell (&dell_XYZ_to_rgb);
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color_transform_table = g_malloc (0x1000000 * 3);
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table_y = COG_OFFSET (color_transform_table, 0 * 0x1000000);
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table_u = COG_OFFSET (color_transform_table, 1 * 0x1000000);
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table_v = COG_OFFSET (color_transform_table, 2 * 0x1000000);
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for (y = 0; y < 256; y++) {
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for (u = 0; u < 256; u++) {
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for (v = 0; v < 256; v++) {
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Color c;
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c.v[0] = y;
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c.v[1] = u;
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c.v[2] = v;
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color_matrix_apply (&bt601_to_rgb, &c, &c);
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color_gamut_clamp (&c, &c);
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color_transfer_function_apply (&c, &c);
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color_matrix_apply (&bt601_rgb_to_XYZ, &c, &c);
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color_matrix_apply (&dell_XYZ_to_rgb, &c, &c);
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color_transfer_function_unapply (&c, &c);
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color_gamut_clamp (&c, &c);
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color_matrix_apply (&bt601_to_yuv, &c, &c);
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table_y[(y << 16) | (u << 8) | (v)] = rint (c.v[0]);
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table_u[(y << 16) | (u << 8) | (v)] = rint (c.v[1]);
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table_v[(y << 16) | (u << 8) | (v)] = rint (c.v[2]);
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}
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}
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}
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}
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#endif
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#if 0
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if (!color_transform_table) {
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ColorMatrix bt709_to_bt601;
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guint8 *table_y;
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guint8 *table_u;
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guint8 *table_v;
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int y, u, v;
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color_matrix_build_bt709_to_bt601 (&bt709_to_bt601);
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color_transform_table = g_malloc (0x1000000 * 3);
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table_y = COG_OFFSET (color_transform_table, 0 * 0x1000000);
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table_u = COG_OFFSET (color_transform_table, 1 * 0x1000000);
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table_v = COG_OFFSET (color_transform_table, 2 * 0x1000000);
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for (y = 0; y < 256; y++) {
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for (u = 0; u < 256; u++) {
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for (v = 0; v < 256; v++) {
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Color c;
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c.v[0] = y;
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c.v[1] = u;
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c.v[2] = v;
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color_matrix_apply (&bt709_to_bt601, &c, &c);
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table_y[(y << 16) | (u << 8) | (v)] = rint (c.v[0]);
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table_u[(y << 16) | (u << 8) | (v)] = rint (c.v[1]);
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table_v[(y << 16) | (u << 8) | (v)] = rint (c.v[2]);
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}
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}
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}
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}
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#endif
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return color_transform_table;
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}
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#endif
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