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/*
* Copyright (c) 2000 John Walker
* Copyright (c) 2016 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avassert.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
enum CieSystem {
XYY,
UCS,
LUV,
NB_CIE
};
enum ColorsSystems {
NTSCsystem,
EBUsystem,
SMPTEsystem,
SMPTE240Msystem,
APPLEsystem,
wRGBsystem,
CIE1931system,
Rec709system,
Rec2020system,
NB_CS
};
typedef struct CiescopeContext {
const AVClass *class;
int color_system;
unsigned gamuts;
int size;
int show_white;
int correct_gamma;
int cie;
float intensity;
float contrast;
int background;
double log2lin[65536];
double igamma;
double i[3][3];
double m[3][3];
AVFrame *f;
void (*filter)(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y);
} CiescopeContext;
#define OFFSET(x) offsetof(CiescopeContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption ciescope_options[] = {
{ "system", "set color system", OFFSET(color_system), AV_OPT_TYPE_INT, {.i64=Rec709system}, 0, NB_CS-1, FLAGS, "system" },
{ "ntsc", "NTSC 1953 Y'I'O' (ITU-R BT.470 System M)", 0, AV_OPT_TYPE_CONST, {.i64=NTSCsystem}, 0, 0, FLAGS, "system" },
{ "470m", "NTSC 1953 Y'I'O' (ITU-R BT.470 System M)", 0, AV_OPT_TYPE_CONST, {.i64=NTSCsystem}, 0, 0, FLAGS, "system" },
{ "ebu", "EBU Y'U'V' (PAL/SECAM) (ITU-R BT.470 System B, G)", 0, AV_OPT_TYPE_CONST, {.i64=EBUsystem}, 0, 0, FLAGS, "system" },
{ "470bg", "EBU Y'U'V' (PAL/SECAM) (ITU-R BT.470 System B, G)", 0, AV_OPT_TYPE_CONST, {.i64=EBUsystem}, 0, 0, FLAGS, "system" },
{ "smpte", "SMPTE-C RGB", 0, AV_OPT_TYPE_CONST, {.i64=SMPTEsystem}, 0, 0, FLAGS, "system" },
{ "240m", "SMPTE-240M Y'PbPr", 0, AV_OPT_TYPE_CONST, {.i64=SMPTE240Msystem},0, 0, FLAGS, "system" },
{ "apple", "Apple RGB", 0, AV_OPT_TYPE_CONST, {.i64=APPLEsystem}, 0, 0, FLAGS, "system" },
{ "widergb", "Adobe Wide Gamut RGB", 0, AV_OPT_TYPE_CONST, {.i64=wRGBsystem}, 0, 0, FLAGS, "system" },
{ "cie1931", "CIE 1931 RGB", 0, AV_OPT_TYPE_CONST, {.i64=CIE1931system}, 0, 0, FLAGS, "system" },
{ "hdtv", "ITU.BT-709 Y'CbCr", 0, AV_OPT_TYPE_CONST, {.i64=Rec709system}, 0, 0, FLAGS, "system" },
{ "rec709", "ITU.BT-709 Y'CbCr", 0, AV_OPT_TYPE_CONST, {.i64=Rec709system}, 0, 0, FLAGS, "system" },
{ "uhdtv", "ITU-R.BT-2020", 0, AV_OPT_TYPE_CONST, {.i64=Rec2020system}, 0, 0, FLAGS, "system" },
{ "rec2020", "ITU-R.BT-2020", 0, AV_OPT_TYPE_CONST, {.i64=Rec2020system}, 0, 0, FLAGS, "system" },
{ "cie", "set cie system", OFFSET(cie), AV_OPT_TYPE_INT, {.i64=XYY}, 0, NB_CIE-1, FLAGS, "cie" },
{ "xyy", "CIE 1931 xyY", 0, AV_OPT_TYPE_CONST, {.i64=XYY}, 0, 0, FLAGS, "cie" },
{ "ucs", "CIE 1960 UCS", 0, AV_OPT_TYPE_CONST, {.i64=UCS}, 0, 0, FLAGS, "cie" },
{ "luv", "CIE 1976 Luv", 0, AV_OPT_TYPE_CONST, {.i64=LUV}, 0, 0, FLAGS, "cie" },
{ "gamuts", "set what gamuts to draw", OFFSET(gamuts), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 0xFFF, FLAGS, "gamuts" },
{ "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<NTSCsystem}, 0, 0, FLAGS, "gamuts" },
{ "470m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<NTSCsystem}, 0, 0, FLAGS, "gamuts" },
{ "ebu", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<EBUsystem}, 0, 0, FLAGS, "gamuts" },
{ "470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<EBUsystem}, 0, 0, FLAGS, "gamuts" },
{ "smpte", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<SMPTEsystem}, 0, 0, FLAGS, "gamuts" },
{ "240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<SMPTE240Msystem}, 0, 0, FLAGS, "gamuts" },
{ "apple", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<APPLEsystem}, 0, 0, FLAGS, "gamuts" },
{ "widergb", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<wRGBsystem}, 0, 0, FLAGS, "gamuts" },
{ "cie1931", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<CIE1931system}, 0, 0, FLAGS, "gamuts" },
{ "hdtv", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<Rec709system}, 0, 0, FLAGS, "gamuts" },
{ "rec709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<Rec709system}, 0, 0, FLAGS, "gamuts" },
{ "uhdtv", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<Rec2020system}, 0, 0, FLAGS, "gamuts" },
{ "rec2020", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<Rec2020system}, 0, 0, FLAGS, "gamuts" },
{ "size", "set ciescope size", OFFSET(size), AV_OPT_TYPE_INT, {.i64=512}, 256, 8192, FLAGS },
{ "s", "set ciescope size", OFFSET(size), AV_OPT_TYPE_INT, {.i64=512}, 256, 8192, FLAGS },
{ "intensity", "set ciescope intensity", OFFSET(intensity), AV_OPT_TYPE_FLOAT, {.dbl=0.001}, 0, 1, FLAGS },
{ "i", "set ciescope intensity", OFFSET(intensity), AV_OPT_TYPE_FLOAT, {.dbl=0.001}, 0, 1, FLAGS },
{ "contrast", NULL, OFFSET(contrast), AV_OPT_TYPE_FLOAT, {.dbl=0.75}, 0, 1, FLAGS },
{ "corrgamma", NULL, OFFSET(correct_gamma), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ "showwhite", NULL, OFFSET(show_white), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ "gamma", NULL, OFFSET(igamma), AV_OPT_TYPE_DOUBLE, {.dbl=2.6}, 0.1, 6, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(ciescope);
static const enum AVPixelFormat in_pix_fmts[] = {
AV_PIX_FMT_RGB24,
AV_PIX_FMT_RGBA,
AV_PIX_FMT_RGB48,
AV_PIX_FMT_RGBA64,
AV_PIX_FMT_XYZ12,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat out_pix_fmts[] = {
AV_PIX_FMT_RGBA64,
AV_PIX_FMT_NONE
};
static int query_formats(AVFilterContext *ctx)
{
int ret;
if ((ret = ff_formats_ref(ff_make_format_list(in_pix_fmts), &ctx->inputs[0]->out_formats)) < 0)
return ret;
if ((ret = ff_formats_ref(ff_make_format_list(out_pix_fmts), &ctx->outputs[0]->in_formats)) < 0)
return ret;
return 0;
}
static int config_output(AVFilterLink *outlink)
{
CiescopeContext *s = outlink->src->priv;
outlink->h = outlink->w = s->size;
outlink->sample_aspect_ratio = (AVRational){1,1};
return 0;
}
/* A color system is defined by the CIE x and y coordinates of its
three primary illuminants and the x and y coordinates of the white
point. */
struct ColorSystem {
double xRed, yRed, /* Red primary illuminant */
xGreen, yGreen, /* Green primary illuminant */
xBlue, yBlue, /* Blue primary illuminant */
xWhite, yWhite, /* White point */
gamma; /* gamma of nonlinear correction */
};
static float const spectral_chromaticity[][3] = {
{ 0.175560, 0.005294, 0.819146 },
{ 0.175483, 0.005286, 0.819231 },
{ 0.175400, 0.005279, 0.819321 },
{ 0.175317, 0.005271, 0.819412 },
{ 0.175237, 0.005263, 0.819500 },
{ 0.175161, 0.005256, 0.819582 },
{ 0.175088, 0.005247, 0.819665 },
{ 0.175015, 0.005236, 0.819749 },
{ 0.174945, 0.005226, 0.819829 },
{ 0.174880, 0.005221, 0.819899 },
{ 0.174821, 0.005221, 0.819959 },
{ 0.174770, 0.005229, 0.820001 },
{ 0.174722, 0.005238, 0.820040 },
{ 0.174665, 0.005236, 0.820098 },
{ 0.174595, 0.005218, 0.820187 },
{ 0.174510, 0.005182, 0.820309 },
{ 0.174409, 0.005127, 0.820464 },
{ 0.174308, 0.005068, 0.820624 },
{ 0.174222, 0.005017, 0.820761 },
{ 0.174156, 0.004981, 0.820863 },
{ 0.174112, 0.004964, 0.820924 },
{ 0.174088, 0.004964, 0.820948 },
{ 0.174073, 0.004973, 0.820955 },
{ 0.174057, 0.004982, 0.820961 },
{ 0.174036, 0.004986, 0.820978 },
{ 0.174008, 0.004981, 0.821012 },
{ 0.173972, 0.004964, 0.821064 },
{ 0.173932, 0.004943, 0.821125 },
{ 0.173889, 0.004926, 0.821185 },
{ 0.173845, 0.004916, 0.821239 },
{ 0.173801, 0.004915, 0.821284 },
{ 0.173754, 0.004925, 0.821321 },
{ 0.173705, 0.004937, 0.821358 },
{ 0.173655, 0.004944, 0.821401 },
{ 0.173606, 0.004940, 0.821454 },
{ 0.173560, 0.004923, 0.821517 },
{ 0.173514, 0.004895, 0.821590 },
{ 0.173468, 0.004865, 0.821667 },
{ 0.173424, 0.004836, 0.821740 },
{ 0.173380, 0.004813, 0.821807 },
{ 0.173337, 0.004797, 0.821866 },
{ 0.173291, 0.004786, 0.821923 },
{ 0.173238, 0.004779, 0.821983 },
{ 0.173174, 0.004775, 0.822051 },
{ 0.173101, 0.004774, 0.822125 },
{ 0.173021, 0.004775, 0.822204 },
{ 0.172934, 0.004781, 0.822285 },
{ 0.172843, 0.004791, 0.822366 },
{ 0.172751, 0.004799, 0.822450 },
{ 0.172662, 0.004802, 0.822536 },
{ 0.172577, 0.004799, 0.822624 },
{ 0.172489, 0.004795, 0.822715 },
{ 0.172396, 0.004796, 0.822808 },
{ 0.172296, 0.004803, 0.822901 },
{ 0.172192, 0.004815, 0.822993 },
{ 0.172087, 0.004833, 0.823081 },
{ 0.171982, 0.004855, 0.823163 },
{ 0.171871, 0.004889, 0.823240 },
{ 0.171741, 0.004939, 0.823319 },
{ 0.171587, 0.005010, 0.823402 },
{ 0.171407, 0.005102, 0.823490 },
{ 0.171206, 0.005211, 0.823583 },
{ 0.170993, 0.005334, 0.823674 },
{ 0.170771, 0.005470, 0.823759 },
{ 0.170541, 0.005621, 0.823838 },
{ 0.170301, 0.005789, 0.823911 },
{ 0.170050, 0.005974, 0.823976 },
{ 0.169786, 0.006177, 0.824037 },
{ 0.169505, 0.006398, 0.824097 },
{ 0.169203, 0.006639, 0.824158 },
{ 0.168878, 0.006900, 0.824222 },
{ 0.168525, 0.007184, 0.824291 },
{ 0.168146, 0.007491, 0.824363 },
{ 0.167746, 0.007821, 0.824433 },
{ 0.167328, 0.008175, 0.824496 },
{ 0.166895, 0.008556, 0.824549 },
{ 0.166446, 0.008964, 0.824589 },
{ 0.165977, 0.009402, 0.824622 },
{ 0.165483, 0.009865, 0.824652 },
{ 0.164963, 0.010351, 0.824687 },
{ 0.164412, 0.010858, 0.824731 },
{ 0.163828, 0.011385, 0.824787 },
{ 0.163210, 0.011937, 0.824853 },
{ 0.162552, 0.012520, 0.824928 },
{ 0.161851, 0.013137, 0.825011 },
{ 0.161105, 0.013793, 0.825102 },
{ 0.160310, 0.014491, 0.825199 },
{ 0.159466, 0.015232, 0.825302 },
{ 0.158573, 0.016015, 0.825412 },
{ 0.157631, 0.016840, 0.825529 },
{ 0.156641, 0.017705, 0.825654 },
{ 0.155605, 0.018609, 0.825786 },
{ 0.154525, 0.019556, 0.825920 },
{ 0.153397, 0.020554, 0.826049 },
{ 0.152219, 0.021612, 0.826169 },
{ 0.150985, 0.022740, 0.826274 },
{ 0.149691, 0.023950, 0.826359 },
{ 0.148337, 0.025247, 0.826416 },
{ 0.146928, 0.026635, 0.826437 },
{ 0.145468, 0.028118, 0.826413 },
{ 0.143960, 0.029703, 0.826337 },
{ 0.142405, 0.031394, 0.826201 },
{ 0.140796, 0.033213, 0.825991 },
{ 0.139121, 0.035201, 0.825679 },
{ 0.137364, 0.037403, 0.825233 },
{ 0.135503, 0.039879, 0.824618 },
{ 0.133509, 0.042692, 0.823798 },
{ 0.131371, 0.045876, 0.822753 },
{ 0.129086, 0.049450, 0.821464 },
{ 0.126662, 0.053426, 0.819912 },
{ 0.124118, 0.057803, 0.818079 },
{ 0.121469, 0.062588, 0.815944 },
{ 0.118701, 0.067830, 0.813468 },
{ 0.115807, 0.073581, 0.810612 },
{ 0.112776, 0.079896, 0.807328 },
{ 0.109594, 0.086843, 0.803563 },
{ 0.106261, 0.094486, 0.799253 },
{ 0.102776, 0.102864, 0.794360 },
{ 0.099128, 0.112007, 0.788865 },
{ 0.095304, 0.121945, 0.782751 },
{ 0.091294, 0.132702, 0.776004 },
{ 0.087082, 0.144317, 0.768601 },
{ 0.082680, 0.156866, 0.760455 },
{ 0.078116, 0.170420, 0.751464 },
{ 0.073437, 0.185032, 0.741531 },
{ 0.068706, 0.200723, 0.730571 },
{ 0.063993, 0.217468, 0.718539 },
{ 0.059316, 0.235254, 0.705430 },
{ 0.054667, 0.254096, 0.691238 },
{ 0.050031, 0.274002, 0.675967 },
{ 0.045391, 0.294976, 0.659633 },
{ 0.040757, 0.316981, 0.642262 },
{ 0.036195, 0.339900, 0.623905 },
{ 0.031756, 0.363598, 0.604646 },
{ 0.027494, 0.387921, 0.584584 },
{ 0.023460, 0.412703, 0.563837 },
{ 0.019705, 0.437756, 0.542539 },
{ 0.016268, 0.462955, 0.520777 },
{ 0.013183, 0.488207, 0.498610 },
{ 0.010476, 0.513404, 0.476120 },
{ 0.008168, 0.538423, 0.453409 },
{ 0.006285, 0.563068, 0.430647 },
{ 0.004875, 0.587116, 0.408008 },
{ 0.003982, 0.610447, 0.385570 },
{ 0.003636, 0.633011, 0.363352 },
{ 0.003859, 0.654823, 0.341318 },
{ 0.004646, 0.675898, 0.319456 },
{ 0.006011, 0.696120, 0.297869 },
{ 0.007988, 0.715342, 0.276670 },
{ 0.010603, 0.733413, 0.255984 },
{ 0.013870, 0.750186, 0.235943 },
{ 0.017766, 0.765612, 0.216622 },
{ 0.022244, 0.779630, 0.198126 },
{ 0.027273, 0.792104, 0.180623 },
{ 0.032820, 0.802926, 0.164254 },
{ 0.038852, 0.812016, 0.149132 },
{ 0.045328, 0.819391, 0.135281 },
{ 0.052177, 0.825164, 0.122660 },
{ 0.059326, 0.829426, 0.111249 },
{ 0.066716, 0.832274, 0.101010 },
{ 0.074302, 0.833803, 0.091894 },
{ 0.082053, 0.834090, 0.083856 },
{ 0.089942, 0.833289, 0.076769 },
{ 0.097940, 0.831593, 0.070468 },
{ 0.106021, 0.829178, 0.064801 },
{ 0.114161, 0.826207, 0.059632 },
{ 0.122347, 0.822770, 0.054882 },
{ 0.130546, 0.818928, 0.050526 },
{ 0.138702, 0.814774, 0.046523 },
{ 0.146773, 0.810395, 0.042832 },
{ 0.154722, 0.805864, 0.039414 },
{ 0.162535, 0.801238, 0.036226 },
{ 0.170237, 0.796519, 0.033244 },
{ 0.177850, 0.791687, 0.030464 },
{ 0.185391, 0.786728, 0.027881 },
{ 0.192876, 0.781629, 0.025495 },
{ 0.200309, 0.776399, 0.023292 },
{ 0.207690, 0.771055, 0.021255 },
{ 0.215030, 0.765595, 0.019375 },
{ 0.222337, 0.760020, 0.017643 },
{ 0.229620, 0.754329, 0.016051 },
{ 0.236885, 0.748524, 0.014591 },
{ 0.244133, 0.742614, 0.013253 },
{ 0.251363, 0.736606, 0.012031 },
{ 0.258578, 0.730507, 0.010916 },
{ 0.265775, 0.724324, 0.009901 },
{ 0.272958, 0.718062, 0.008980 },
{ 0.280129, 0.711725, 0.008146 },
{ 0.287292, 0.705316, 0.007391 },
{ 0.294450, 0.698842, 0.006708 },
{ 0.301604, 0.692308, 0.006088 },
{ 0.308760, 0.685712, 0.005528 },
{ 0.315914, 0.679063, 0.005022 },
{ 0.323066, 0.672367, 0.004566 },
{ 0.330216, 0.665628, 0.004156 },
{ 0.337363, 0.658848, 0.003788 },
{ 0.344513, 0.652028, 0.003459 },
{ 0.351664, 0.645172, 0.003163 },
{ 0.358814, 0.638287, 0.002899 },
{ 0.365959, 0.631379, 0.002662 },
{ 0.373102, 0.624451, 0.002448 },
{ 0.380244, 0.617502, 0.002254 },
{ 0.387379, 0.610542, 0.002079 },
{ 0.394507, 0.603571, 0.001922 },
{ 0.401626, 0.596592, 0.001782 },
{ 0.408736, 0.589607, 0.001657 },
{ 0.415836, 0.582618, 0.001546 },
{ 0.422921, 0.575631, 0.001448 },
{ 0.429989, 0.568649, 0.001362 },
{ 0.437036, 0.561676, 0.001288 },
{ 0.444062, 0.554714, 0.001224 },
{ 0.451065, 0.547766, 0.001169 },
{ 0.458041, 0.540837, 0.001123 },
{ 0.464986, 0.533930, 0.001084 },
{ 0.471899, 0.527051, 0.001051 },
{ 0.478775, 0.520202, 0.001023 },
{ 0.485612, 0.513389, 0.001000 },
{ 0.492405, 0.506615, 0.000980 },
{ 0.499151, 0.499887, 0.000962 },
{ 0.505845, 0.493211, 0.000944 },
{ 0.512486, 0.486591, 0.000923 },
{ 0.519073, 0.480029, 0.000899 },
{ 0.525600, 0.473527, 0.000872 },
{ 0.532066, 0.467091, 0.000843 },
{ 0.538463, 0.460725, 0.000812 },
{ 0.544787, 0.454434, 0.000779 },
{ 0.551031, 0.448225, 0.000744 },
{ 0.557193, 0.442099, 0.000708 },
{ 0.563269, 0.436058, 0.000673 },
{ 0.569257, 0.430102, 0.000641 },
{ 0.575151, 0.424232, 0.000616 },
{ 0.580953, 0.418447, 0.000601 },
{ 0.586650, 0.412758, 0.000591 },
{ 0.592225, 0.407190, 0.000586 },
{ 0.597658, 0.401762, 0.000580 },
{ 0.602933, 0.396497, 0.000571 },
{ 0.608035, 0.391409, 0.000556 },
{ 0.612977, 0.386486, 0.000537 },
{ 0.617779, 0.381706, 0.000516 },
{ 0.622459, 0.377047, 0.000493 },
{ 0.627037, 0.372491, 0.000472 },
{ 0.631521, 0.368026, 0.000453 },
{ 0.635900, 0.363665, 0.000435 },
{ 0.640156, 0.359428, 0.000416 },
{ 0.644273, 0.355331, 0.000396 },
{ 0.648233, 0.351395, 0.000372 },
{ 0.652028, 0.347628, 0.000344 },
{ 0.655669, 0.344018, 0.000313 },
{ 0.659166, 0.340553, 0.000281 },
{ 0.662528, 0.337221, 0.000251 },
{ 0.665764, 0.334011, 0.000226 },
{ 0.668874, 0.330919, 0.000207 },
{ 0.671859, 0.327947, 0.000194 },
{ 0.674720, 0.325095, 0.000185 },
{ 0.677459, 0.322362, 0.000179 },
{ 0.680079, 0.319747, 0.000174 },
{ 0.682582, 0.317249, 0.000170 },
{ 0.684971, 0.314863, 0.000167 },
{ 0.687250, 0.312586, 0.000164 },
{ 0.689426, 0.310414, 0.000160 },
{ 0.691504, 0.308342, 0.000154 },
{ 0.693490, 0.306366, 0.000145 },
{ 0.695389, 0.304479, 0.000133 },
{ 0.697206, 0.302675, 0.000119 },
{ 0.698944, 0.300950, 0.000106 },
{ 0.700606, 0.299301, 0.000093 },
{ 0.702193, 0.297725, 0.000083 },
{ 0.703709, 0.296217, 0.000074 },
{ 0.705163, 0.294770, 0.000067 },
{ 0.706563, 0.293376, 0.000061 },
{ 0.707918, 0.292027, 0.000055 },
{ 0.709231, 0.290719, 0.000050 },
{ 0.710500, 0.289453, 0.000047 },
{ 0.711724, 0.288232, 0.000044 },
{ 0.712901, 0.287057, 0.000041 },
{ 0.714032, 0.285929, 0.000040 },
{ 0.715117, 0.284845, 0.000038 },
{ 0.716159, 0.283804, 0.000036 },
{ 0.717159, 0.282806, 0.000035 },
{ 0.718116, 0.281850, 0.000034 },
{ 0.719033, 0.280935, 0.000032 },
{ 0.719912, 0.280058, 0.000030 },
{ 0.720753, 0.279219, 0.000028 },
{ 0.721555, 0.278420, 0.000026 },
{ 0.722315, 0.277662, 0.000023 },
{ 0.723032, 0.276948, 0.000020 },
{ 0.723702, 0.276282, 0.000016 },
{ 0.724328, 0.275660, 0.000012 },
{ 0.724914, 0.275078, 0.000007 },
{ 0.725467, 0.274530, 0.000003 },
{ 0.725992, 0.274008, 0.000000 },
{ 0.726495, 0.273505, 0.000000 },
{ 0.726975, 0.273025, 0.000000 },
{ 0.727432, 0.272568, 0.000000 },
{ 0.727864, 0.272136, 0.000000 },
{ 0.728272, 0.271728, 0.000000 },
{ 0.728656, 0.271344, 0.000000 },
{ 0.729020, 0.270980, 0.000000 },
{ 0.729361, 0.270639, 0.000000 },
{ 0.729678, 0.270322, 0.000000 },
{ 0.729969, 0.270031, 0.000000 },
{ 0.730234, 0.269766, 0.000000 },
{ 0.730474, 0.269526, 0.000000 },
{ 0.730693, 0.269307, 0.000000 },
{ 0.730896, 0.269104, 0.000000 },
{ 0.731089, 0.268911, 0.000000 },
{ 0.731280, 0.268720, 0.000000 },
{ 0.731467, 0.268533, 0.000000 },
{ 0.731650, 0.268350, 0.000000 },
{ 0.731826, 0.268174, 0.000000 },
{ 0.731993, 0.268007, 0.000000 },
{ 0.732150, 0.267850, 0.000000 },
{ 0.732300, 0.267700, 0.000000 },
{ 0.732443, 0.267557, 0.000000 },
{ 0.732581, 0.267419, 0.000000 },
{ 0.732719, 0.267281, 0.000000 },
{ 0.732859, 0.267141, 0.000000 },
{ 0.733000, 0.267000, 0.000000 },
{ 0.733142, 0.266858, 0.000000 },
{ 0.733281, 0.266719, 0.000000 },
{ 0.733417, 0.266583, 0.000000 },
{ 0.733551, 0.266449, 0.000000 },
{ 0.733683, 0.266317, 0.000000 },
{ 0.733813, 0.266187, 0.000000 },
{ 0.733936, 0.266064, 0.000000 },
{ 0.734047, 0.265953, 0.000000 },
{ 0.734143, 0.265857, 0.000000 },
{ 0.734221, 0.265779, 0.000000 },
{ 0.734286, 0.265714, 0.000000 },
{ 0.734341, 0.265659, 0.000000 },
{ 0.734390, 0.265610, 0.000000 },
{ 0.734438, 0.265562, 0.000000 },
{ 0.734482, 0.265518, 0.000000 },
{ 0.734523, 0.265477, 0.000000 },
{ 0.734560, 0.265440, 0.000000 },
{ 0.734592, 0.265408, 0.000000 },
{ 0.734621, 0.265379, 0.000000 },
{ 0.734649, 0.265351, 0.000000 },
{ 0.734673, 0.265327, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
{ 0.734690, 0.265310, 0.000000 },
};
/* Standard white point chromaticities. */
#define C 0.310063, 0.316158
#define E 1.0/3.0, 1.0/3.0
#define D50 0.34570, 0.3585
#define D65 0.312713, 0.329016
/* Gamma of nonlinear correction.
See Charles Poynton's ColorFAQ Item 45 and GammaFAQ Item 6 at
http://www.inforamp.net/~poynton/ColorFAQ.html
http://www.inforamp.net/~poynton/GammaFAQ.html
*/
#define GAMMA_REC709 0. /* Rec. 709 */
static const struct ColorSystem color_systems[] = {
[NTSCsystem] = {
0.67, 0.33, 0.21, 0.71, 0.14, 0.08,
C, GAMMA_REC709
},
[EBUsystem] = {
0.64, 0.33, 0.29, 0.60, 0.15, 0.06,
D65, GAMMA_REC709
},
[SMPTEsystem] = {
0.630, 0.340, 0.310, 0.595, 0.155, 0.070,
D65, GAMMA_REC709
},
[SMPTE240Msystem] = {
0.670, 0.330, 0.210, 0.710, 0.150, 0.060,
D65, GAMMA_REC709
},
[APPLEsystem] = {
0.625, 0.340, 0.280, 0.595, 0.115, 0.070,
D65, GAMMA_REC709
},
[wRGBsystem] = {
0.7347, 0.2653, 0.1152, 0.8264, 0.1566, 0.0177,
D50, GAMMA_REC709
},
[CIE1931system] = {
0.7347, 0.2653, 0.2738, 0.7174, 0.1666, 0.0089,
E, GAMMA_REC709
},
[Rec709system] = {
0.64, 0.33, 0.30, 0.60, 0.15, 0.06,
D65, GAMMA_REC709
},
[Rec2020system] = {
0.708, 0.292, 0.170, 0.797, 0.131, 0.046,
D65, GAMMA_REC709
},
};
/*
static struct ColorSystem CustomSystem = {
"Custom",
0.64, 0.33, 0.30, 0.60, 0.15, 0.06,
D65, GAMMA_REC709
};
*/
static void
uv_to_xy(double const u,
double const v,
double * const xc,
double * const yc)
{
/*
Given 1970 coordinates u, v, determine 1931 chromaticities x, y
*/
*xc = 3*u / (2*u - 8*v + 4);
*yc = 2*v / (2*u - 8*v + 4);
}
static void
upvp_to_xy(double const up,
double const vp,
double * const xc,
double * const yc)
{
/*
Given 1976 coordinates u', v', determine 1931 chromaticities x, y
*/
*xc = 9*up / (6*up - 16*vp + 12);
*yc = 4*vp / (6*up - 16*vp + 12);
}
static void
xy_to_upvp(double xc,
double yc,
double * const up,
double * const vp)
{
/*
Given 1931 chromaticities x, y, determine 1976 coordinates u', v'
*/
*up = 4*xc / (- 2*xc + 12*yc + 3);
*vp = 9*yc / (- 2*xc + 12*yc + 3);
}
static void
xy_to_uv(double xc,
double yc,
double * const u,
double * const v)
{
/*
Given 1931 chromaticities x, y, determine 1960 coordinates u, v
*/
*u = 4*xc / (- 2*xc + 12*yc + 3);
*v = 6*yc / (- 2*xc + 12*yc + 3);
}
static void
xyz_to_rgb(const double m[3][3],
double xc, double yc, double zc,
double * const r, double * const g, double * const b)
{
*r = m[0][0]*xc + m[0][1]*yc + m[0][2]*zc;
*g = m[1][0]*xc + m[1][1]*yc + m[1][2]*zc;
*b = m[2][0]*xc + m[2][1]*yc + m[2][2]*zc;
}
static void invert_matrix3x3(double in[3][3], double out[3][3])
{
double m00 = in[0][0], m01 = in[0][1], m02 = in[0][2],
m10 = in[1][0], m11 = in[1][1], m12 = in[1][2],
m20 = in[2][0], m21 = in[2][1], m22 = in[2][2];
int i, j; |