| /* |
| * 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, |
| DCIP3, |
| 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" }, |
| { "dcip3", "DCI-P3", 0, AV_OPT_TYPE_CONST, {.i64=DCIP3}, 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" }, |
| { "dcip3", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<DCIP3}, 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]->outcfg.formats)) < 0) |
| return ret; |
| |
| if ((ret = ff_formats_ref(ff_make_format_list(out_pix_fmts), &ctx->outputs[0]->incfg.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 |
| }, |
| [DCIP3] = { |
| 0.680, 0.320, 0.265, 0.690, 0.150, 0.060, |
| 0.314, 0.351, 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; |
| double det; |
| |
| out[0][0] = (m11 * m22 - m21 * m12); |
| out[0][1] = -(m01 * m22 - m21 * m02); |
| out[0][2] = (m01 * m12 - m11 * m02); |
| out[1][0] = -(m10 * m22 - m20 * m12); |
| out[1][1] = (m00 * m22 - m20 * m02); |
| out[1][2] = -(m00 * m12 - m10 * m02); |
| out[2][0] = (m10 * m21 - m20 * m11); |
| out[2][1] = -(m00 * m21 - m20 * m01); |
| out[2][2] = (m00 * m11 - m10 * m01); |
| |
| det = m00 * out[0][0] + m10 * out[0][1] + m20 * out[0][2]; |
| det = 1.0 / det; |
| |
| for (i = 0; i < 3; i++) { |
| for (j = 0; j < 3; j++) |
| out[i][j] *= det; |
| } |
| } |
| |
| static void get_rgb2xyz_matrix(struct ColorSystem system, double m[3][3]) |
| { |
| double S[3], X[4], Z[4]; |
| int i; |
| |
| X[0] = system.xRed / system.yRed; |
| X[1] = system.xGreen / system.yGreen; |
| X[2] = system.xBlue / system.yBlue; |
| X[3] = system.xWhite / system.yWhite; |
| |
| Z[0] = (1 - system.xRed - system.yRed) / system.yRed; |
| Z[1] = (1 - system.xGreen - system.yGreen) / system.yGreen; |
| Z[2] = (1 - system.xBlue - system.yBlue) / system.yBlue; |
| Z[3] = (1 - system.xWhite - system.yWhite) / system.yWhite; |
| |
| for (i = 0; i < 3; i++) { |
| m[0][i] = X[i]; |
| m[1][i] = 1; |
| m[2][i] = Z[i]; |
| } |
| |
| invert_matrix3x3(m, m); |
| |
| for (i = 0; i < 3; i++) |
| S[i] = m[i][0] * X[3] + m[i][1] * 1 + m[i][2] * Z[3]; |
| |
| for (i = 0; i < 3; i++) { |
| m[0][i] = S[i] * X[i]; |
| m[1][i] = S[i] * 1; |
| m[2][i] = S[i] * Z[i]; |
| } |
| } |
| |
| static void |
| rgb_to_xy(double rc, |
| double gc, |
| double bc, |
| double * const x, |
| double * const y, |
| double * const z, |
| const double m[3][3]) |
| { |
| double sum; |
| |
| *x = m[0][0] * rc + m[0][1] * gc + m[0][2] * bc; |
| *y = m[1][0] * rc + m[1][1] * gc + m[1][2] * bc; |
| *z = m[2][0] * rc + m[2][1] * gc + m[2][2] * bc; |
| |
| sum = *x + *y + *z; |
| |
| *x = *x / sum; |
| *y = *y / sum; |
| } |
| |
| static int |
| constrain_rgb(double * const r, |
| double * const g, |
| double * const b) |
| { |
| /*---------------------------------------------------------------------------- |
| If the requested RGB shade contains a negative weight for one of |
| the primaries, it lies outside the color gamut accessible from |
| the given triple of primaries. Desaturate it by adding white, |
| equal quantities of R, G, and B, enough to make RGB all positive. |
| -----------------------------------------------------------------------------*/ |
| double w; |
| |
| /* Amount of white needed is w = - min(0, *r, *g, *b) */ |
| w = (0 < *r) ? 0 : *r; |
| w = (w < *g) ? w : *g; |
| w = (w < *b) ? w : *b; |
| w = - w; |
| |
| /* Add just enough white to make r, g, b all positive. */ |
| if (w > 0) { |
| *r += w; *g += w; *b += w; |
| |
| return 1; /* Color modified to fit RGB gamut */ |
| } |
| |
| return 0; /* Color within RGB gamut */ |
| } |
| |
| static void |
| gamma_correct(const struct ColorSystem * const cs, |
| double * const c) |
| { |
| /*---------------------------------------------------------------------------- |
| Transform linear RGB values to nonlinear RGB values. |
| |
| Rec. 709 is ITU-R Recommendation BT. 709 (1990) |
| ``Basic Parameter Values for the HDTV Standard for the Studio and for |
| International Programme Exchange'', formerly CCIR Rec. 709. |
| |
| For details see |
| http://www.inforamp.net/~poynton/ColorFAQ.html |
| http://www.inforamp.net/~poynton/GammaFAQ.html |
| -----------------------------------------------------------------------------*/ |
| double gamma; |
| double cc; |
| |
| gamma = cs->gamma; |
| |
| if (gamma == 0.) { |
| /* Rec. 709 gamma correction. */ |
| cc = 0.018; |
| if (*c < cc) { |
| *c *= (1.099 * pow(cc, 0.45) - 0.099) / cc; |
| } else { |
| *c = 1.099 * pow(*c, 0.45) - 0.099; |
| } |
| } else { |
| /* Nonlinear color = (Linear color)^(1/gamma) */ |
| *c = pow(*c, 1./gamma); |
| } |
| } |
| |
| |
| |
| static void |
| gamma_correct_rgb(const struct ColorSystem * const cs, |
| double * const r, |
| double * const g, |
| double * const b) |
| { |
| gamma_correct(cs, r); |
| gamma_correct(cs, g); |
| gamma_correct(cs, b); |
| } |
| |
| /* Sz(X) is the displacement in pixels of a displacement of X normalized |
| distance units. (A normalized distance unit is 1/512 of the smaller |
| dimension of the canvas) |
| */ |
| #define Sz(x) (((x) * (int)FFMIN(w, h)) / 512) |
| |
| static void |
| monochrome_color_location(double waveLength, int w, int h, |
| int cie, int *xP, int *yP) |
| { |
| const int ix = waveLength - 360; |
| const double pX = spectral_chromaticity[ix][0]; |
| const double pY = spectral_chromaticity[ix][1]; |
| const double pZ = spectral_chromaticity[ix][2]; |
| const double px = pX / (pX + pY + pZ); |
| const double py = pY / (pX + pY + pZ); |
| |
| if (cie == LUV) { |
| double up, vp; |
| |
| xy_to_upvp(px, py, &up, &vp); |
| *xP = up * (w - 1); |
| *yP = (h - 1) - vp * (h - 1); |
| } else if (cie == UCS) { |
| double u, v; |
| |
| xy_to_uv(px, py, &u, &v); |
| *xP = u * (w - 1); |
| *yP = (h - 1) - v * (h - 1); |
| } else if (cie == XYY) { |
| *xP = px * (w - 1); |
| *yP = (h - 1) - py * (h - 1); |
| } else { |
| av_assert0(0); |
| } |
| } |
| |
| static void |
| find_tongue(uint16_t* const pixels, |
| int const w, |
| int const linesize, |
| int const row, |
| int * const presentP, |
| int * const leftEdgeP, |
| int * const rightEdgeP) |
| { |
| int i; |
| |
| for (i = 0; i < w && pixels[row * linesize + i * 4 + 0] == 0; i++) |
| ; |
| |
| if (i >= w) { |
| *presentP = 0; |
| } else { |
| int j; |
| int const leftEdge = i; |
| |
| *presentP = 1; |
| |
| for (j = w - 1; j >= leftEdge && pixels[row * linesize + j * 4 + 0] == 0; j--) |
| ; |
| |
| *rightEdgeP = j; |
| *leftEdgeP = leftEdge; |
| } |
| } |
| |
| static void draw_line(uint16_t *const pixels, int linesize, |
| int x0, int y0, int x1, int y1, |
| int w, int h, |
| const uint16_t *const rgbcolor) |
| { |
| int dx = FFABS(x1 - x0), sx = x0 < x1 ? 1 : -1; |
| int dy = FFABS(y1 - y0), sy = y0 < y1 ? 1 : -1; |
| int err = (dx > dy ? dx : -dy) / 2, e2; |
| |
| for (;;) { |
| pixels[y0 * linesize + x0 * 4 + 0] = rgbcolor[0]; |
| pixels[y0 * linesize + x0 * 4 + 1] = rgbcolor[1]; |
| pixels[y0 * linesize + x0 * 4 + 2] = rgbcolor[2]; |
| pixels[y0 * linesize + x0 * 4 + 3] = rgbcolor[3]; |
| |
| if (x0 == x1 && y0 == y1) |
| break; |
| |
| e2 = err; |
| |
| if (e2 >-dx) { |
| err -= dy; |
| x0 += sx; |
| } |
| |
| if (e2 < dy) { |
| err += dx; |
| y0 += sy; |
| } |
| } |
| } |
| |
| static void draw_rline(uint16_t *const pixels, int linesize, |
| int x0, int y0, int x1, int y1, |
| int w, int h) |
| { |
| int dx = FFABS(x1 - x0), sx = x0 < x1 ? 1 : -1; |
| int dy = FFABS(y1 - y0), sy = y0 < y1 ? 1 : -1; |
| int err = (dx > dy ? dx : -dy) / 2, e2; |
| |
| for (;;) { |
| pixels[y0 * linesize + x0 * 4 + 0] = 65535 - pixels[y0 * linesize + x0 * 4 + 0]; |
| pixels[y0 * linesize + x0 * 4 + 1] = 65535 - pixels[y0 * linesize + x0 * 4 + 1]; |
| pixels[y0 * linesize + x0 * 4 + 2] = 65535 - pixels[y0 * linesize + x0 * 4 + 2]; |
| pixels[y0 * linesize + x0 * 4 + 3] = 65535; |
| |
| if (x0 == x1 && y0 == y1) |
| break; |
| |
| e2 = err; |
| |
| if (e2 >-dx) { |
| err -= dy; |
| x0 += sx; |
| } |
| |
| if (e2 < dy) { |
| err += dx; |
| y0 += sy; |
| } |
| } |
| } |
| |
| static void |
| tongue_outline(uint16_t* const pixels, |
| int const linesize, |
| int const w, |
| int const h, |
| uint16_t const maxval, |
| int const cie) |
| { |
| const uint16_t rgbcolor[4] = { maxval, maxval, maxval, maxval }; |
| int wavelength; |
| int lx, ly; |
| int fx, fy; |
| |
| for (wavelength = 360; wavelength <= 830; wavelength++) { |
| int icx, icy; |
| |
| monochrome_color_location(wavelength, w, h, cie, |
| &icx, &icy); |
| |
| if (wavelength > 360) |
| draw_line(pixels, linesize, lx, ly, icx, icy, w, h, rgbcolor); |
| else { |
| fx = icx; |
| fy = icy; |
| } |
| lx = icx; |
| ly = icy; |
| } |
| draw_line(pixels, linesize, lx, ly, fx, fy, w, h, rgbcolor); |
| } |
| |
| static void |
| fill_in_tongue(uint16_t* const pixels, |
| int const linesize, |
| int const w, |
| int const h, |
| uint16_t const maxval, |
| const struct ColorSystem * const cs, |
| double const m[3][3], |
| int const cie, |
| int const correct_gamma, |
| float const contrast) |
| { |
| int y; |
| |
| /* Scan the image line by line and fill the tongue outline |
| with the RGB values determined by the color system for the x-y |
| co-ordinates within the tongue. |
| */ |
| |
| for (y = 0; y < h; ++y) { |
| int present; /* There is some tongue on this line */ |
| int leftEdge; /* x position of leftmost pixel in tongue on this line */ |
| int rightEdge; /* same, but rightmost */ |
| |
| find_tongue(pixels, w, linesize, y, &present, &leftEdge, &rightEdge); |
| |
| if (present) { |
| int x; |
| |
| for (x = leftEdge; x <= rightEdge; ++x) { |
| double cx, cy, cz, jr, jg, jb, jmax; |
| int r, g, b, mx = maxval; |
| |
| if (cie == LUV) { |
| double up, vp; |
| up = ((double) x) / (w - 1); |
| vp = 1.0 - ((double) y) / (h - 1); |
| upvp_to_xy(up, vp, &cx, &cy); |
| cz = 1.0 - (cx + cy); |
| } else if (cie == UCS) { |
| double u, v; |
| u = ((double) x) / (w - 1); |
| v = 1.0 - ((double) y) / (h - 1); |
| uv_to_xy(u, v, &cx, &cy); |
| cz = 1.0 - (cx + cy); |
| } else if (cie == XYY) { |
| cx = ((double) x) / (w - 1); |
| cy = 1.0 - ((double) y) / (h - 1); |
| cz = 1.0 - (cx + cy); |
| } else { |
| av_assert0(0); |
| } |
| |
| xyz_to_rgb(m, cx, cy, cz, &jr, &jg, &jb); |
| |
| /* Check whether the requested color is within the |
| gamut achievable with the given color system. If |
| not, draw it in a reduced intensity, interpolated |
| by desaturation to the closest within-gamut color. */ |
| |
| if (constrain_rgb(&jr, &jg, &jb)) |
| mx *= contrast; |
| |
| jmax = FFMAX3(jr, jg, jb); |
| if (jmax > 0) { |
| jr = jr / jmax; |
| jg = jg / jmax; |
| jb = jb / jmax; |
| } |
| /* gamma correct from linear rgb to nonlinear rgb. */ |
| if (correct_gamma) |
| gamma_correct_rgb(cs, &jr, &jg, &jb); |
| r = mx * jr; |
| g = mx * jg; |
| b = mx * jb; |
| pixels[y * linesize + x * 4 + 0] = r; |
| pixels[y * linesize + x * 4 + 1] = g; |
| pixels[y * linesize + x * 4 + 2] = b; |
| pixels[y * linesize + x * 4 + 3] = 65535; |
| } |
| } |
| } |
| } |
| |
| static void |
| plot_white_point(uint16_t* pixels, |
| int const linesize, |
| int const w, |
| int const h, |
| int const maxval, |
| int const color_system, |
| int const cie) |
| { |
| const struct ColorSystem *cs = &color_systems[color_system]; |
| int wx, wy; |
| |
| if (cie == LUV) { |
| double wup, wvp; |
| xy_to_upvp(cs->xWhite, cs->yWhite, &wup, &wvp); |
| wx = (w - 1) * wup; |
| wy = (h - 1) - ((int) ((h - 1) * wvp)); |
| } else if (cie == UCS) { |
| double wu, wv; |
| xy_to_uv(cs->xWhite, cs->yWhite, &wu, &wv); |
| wx = (w - 1) * wu; |
| wy = (h - 1) - ((int) ((h - 1) * wv)); |
| } else if (cie == XYY) { |
| wx = (w - 1) * cs->xWhite; |
| wy = (h - 1) - ((int) ((h - 1) * cs->yWhite)); |
| } else { |
| av_assert0(0); |
| } |
| |
| draw_rline(pixels, linesize, |
| wx + Sz(3), wy, wx + Sz(10), wy, |
| w, h); |
| draw_rline(pixels, linesize, |
| wx - Sz(3), wy, wx - Sz(10), wy, |
| w, h); |
| draw_rline(pixels, linesize, |
| wx, wy + Sz(3), wx, wy + Sz(10), |
| w, h); |
| draw_rline(pixels, linesize, |
| wx, wy - Sz(3), wx, wy - Sz(10), |
| w, h); |
| } |
| |
| static int draw_background(AVFilterContext *ctx) |
| { |
| CiescopeContext *s = ctx->priv; |
| const struct ColorSystem *cs = &color_systems[s->color_system]; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| int w = s->size; |
| int h = s->size; |
| uint16_t *pixels; |
| |
| if ((s->f = ff_get_video_buffer(outlink, outlink->w, outlink->h)) == NULL) |
| return AVERROR(ENOMEM); |
| pixels = (uint16_t *)s->f->data[0]; |
| |
| tongue_outline(pixels, s->f->linesize[0] / 2, w, h, 65535, s->cie); |
| |
| fill_in_tongue(pixels, s->f->linesize[0] / 2, w, h, 65535, cs, (const double (*)[3])s->i, s->cie, |
| s->correct_gamma, s->contrast); |
| |
| return 0; |
| } |
| |
| static void filter_rgb48(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y) |
| { |
| CiescopeContext *s = ctx->priv; |
| const uint16_t* src = (const uint16_t*)(in->data[0] + in->linesize[0] * y + x * 6); |
| double r = src[0] / 65535.; |
| double g = src[1] / 65535.; |
| double b = src[2] / 65535.; |
| double cz; |
| |
| rgb_to_xy(r, g, b, cx, cy, &cz, (const double (*)[3])s->m); |
| } |
| |
| static void filter_rgba64(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y) |
| { |
| CiescopeContext *s = ctx->priv; |
| const uint16_t* src = (const uint16_t*)(in->data[0] + in->linesize[0] * y + x * 8); |
| double r = src[0] / 65535.; |
| double g = src[1] / 65535.; |
| double b = src[2] / 65535.; |
| double cz; |
| |
| rgb_to_xy(r, g, b, cx, cy, &cz, (const double (*)[3])s->m); |
| } |
| |
| static void filter_rgb24(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y) |
| { |
| CiescopeContext *s = ctx->priv; |
| const uint8_t* src = in->data[0] + in->linesize[0] * y + x * 3; |
| double r = src[0] / 255.; |
| double g = src[1] / 255.; |
| double b = src[2] / 255.; |
| double cz; |
| |
| rgb_to_xy(r, g, b, cx, cy, &cz, (const double (*)[3])s->m); |
| } |
| |
| static void filter_rgba(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y) |
| { |
| CiescopeContext *s = ctx->priv; |
| const uint8_t* src = in->data[0] + in->linesize[0] * y + x * 4; |
| double r = src[0] / 255.; |
| double g = src[1] / 255.; |
| double b = src[2] / 255.; |
| double cz; |
| |
| rgb_to_xy(r, g, b, cx, cy, &cz, (const double (*)[3])s->m); |
| } |
| |
| static void filter_xyz(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y) |
| { |
| CiescopeContext *s = ctx->priv; |
| const uint16_t* src = (uint16_t *)(in->data[0] + in->linesize[0] * y + x * 6); |
| double lx = s->log2lin[src[0]]; |
| double ly = s->log2lin[src[1]]; |
| double lz = s->log2lin[src[2]]; |
| double sum = lx + ly + lz; |
| |
| if (sum == 0) |
| sum = 1; |
| *cx = lx / sum; |
| *cy = ly / sum; |
| } |
| |
| static void plot_gamuts(uint16_t *pixels, int linesize, int w, int h, |
| int cie, int gamuts) |
| { |
| int i; |
| |
| for (i = 0; i < NB_CS; i++) { |
| const struct ColorSystem *cs = &color_systems[i]; |
| int rx, ry, gx, gy, bx, by; |
| |
| if (!((1 << i) & gamuts)) |
| continue; |
| if (cie == LUV) { |
| double wup, wvp; |
| xy_to_upvp(cs->xRed, cs->yRed, &wup, &wvp); |
| rx = (w - 1) * wup; |
| ry = (h - 1) - ((int) ((h - 1) * wvp)); |
| xy_to_upvp(cs->xGreen, cs->yGreen, &wup, &wvp); |
| gx = (w - 1) * wup; |
| gy = (h - 1) - ((int) ((h - 1) * wvp)); |
| xy_to_upvp(cs->xBlue, cs->yBlue, &wup, &wvp); |
| bx = (w - 1) * wup; |
| by = (h - 1) - ((int) ((h - 1) * wvp)); |
| } else if (cie == UCS) { |
| double wu, wv; |
| xy_to_uv(cs->xRed, cs->yRed, &wu, &wv); |
| rx = (w - 1) * wu; |
| ry = (h - 1) - ((int) ((h - 1) * wv)); |
| xy_to_uv(cs->xGreen, cs->yGreen, &wu, &wv); |
| gx = (w - 1) * wu; |
| gy = (h - 1) - ((int) ((h - 1) * wv)); |
| xy_to_uv(cs->xBlue, cs->yBlue, &wu, &wv); |
| bx = (w - 1) * wu; |
| by = (h - 1) - ((int) ((h - 1) * wv)); |
| } else if (cie == XYY) { |
| rx = (w - 1) * cs->xRed; |
| ry = (h - 1) - ((int) ((h - 1) * cs->yRed)); |
| gx = (w - 1) * cs->xGreen; |
| gy = (h - 1) - ((int) ((h - 1) * cs->yGreen)); |
| bx = (w - 1) * cs->xBlue; |
| by = (h - 1) - ((int) ((h - 1) * cs->yBlue)); |
| } else { |
| av_assert0(0); |
| } |
| |
| draw_rline(pixels, linesize, rx, ry, gx, gy, w, h); |
| draw_rline(pixels, linesize, gx, gy, bx, by, w, h); |
| draw_rline(pixels, linesize, bx, by, rx, ry, w, h); |
| } |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| CiescopeContext *s = ctx->priv; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| int i = s->intensity * 65535; |
| int w = outlink->w; |
| int h = outlink->h; |
| AVFrame *out; |
| int ret, x, y; |
| |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) { |
| av_frame_free(&in); |
| return AVERROR(ENOMEM); |
| } |
| out->pts = in->pts; |
| |
| if (!s->background) { |
| ret = draw_background(ctx); |
| if (ret < 0) { |
| av_frame_free(&out); |
| return ret; |
| } |
| s->background = 1; |
| } |
| for (y = 0; y < outlink->h; y++) { |
| memset(out->data[0] + y * out->linesize[0], 0, outlink->w * 8); |
| } |
| |
| for (y = 0; y < in->height; y++) { |
| for (x = 0; x < in->width; x++) { |
| double cx, cy; |
| uint16_t *dst; |
| int wx, wy; |
| |
| s->filter(ctx, in, &cx, &cy, x, y); |
| |
| if (s->cie == LUV) { |
| double up, vp; |
| xy_to_upvp(cx, cy, &up, &vp); |
| cx = up; |
| cy = vp; |
| } else if (s->cie == UCS) { |
| double u, v; |
| xy_to_uv(cx, cy, &u, &v); |
| cx = u; |
| cy = v; |
| } |
| |
| wx = (w - 1) * cx; |
| wy = (h - 1) - ((h - 1) * cy); |
| |
| if (wx < 0 || wx >= w || |
| wy < 0 || wy >= h) |
| continue; |
| |
| dst = (uint16_t *)(out->data[0] + wy * out->linesize[0] + wx * 8 + 0); |
| dst[0] = FFMIN(dst[0] + i, 65535); |
| dst[1] = FFMIN(dst[1] + i, 65535); |
| dst[2] = FFMIN(dst[2] + i, 65535); |
| dst[3] = 65535; |
| } |
| } |
| |
| for (y = 0; y < outlink->h; y++) { |
| uint16_t *dst = (uint16_t *)(out->data[0] + y * out->linesize[0]); |
| const uint16_t *src = (const uint16_t *)(s->f->data[0] + y * s->f->linesize[0]); |
| for (x = 0; x < outlink->w; x++) { |
| const int xx = x * 4; |
| if (dst[xx + 3] == 0) { |
| dst[xx + 0] = src[xx + 0]; |
| dst[xx + 1] = src[xx + 1]; |
| dst[xx + 2] = src[xx + 2]; |
| dst[xx + 3] = src[xx + 3]; |
| } |
| } |
| } |
| |
| if (s->show_white) |
| plot_white_point((uint16_t *)out->data[0], out->linesize[0] / 2, |
| outlink->w, outlink->h, 65535, |
| s->color_system, s->cie); |
| |
| plot_gamuts((uint16_t *)out->data[0], out->linesize[0] / 2, |
| outlink->w, outlink->h, |
| s->cie, s->gamuts); |
| |
| av_frame_free(&in); |
| return ff_filter_frame(outlink, out); |
| } |
| |
| static void av_cold uninit(AVFilterContext *ctx) |
| { |
| CiescopeContext *s = ctx->priv; |
| |
| av_frame_free(&s->f); |
| } |
| |
| static int config_input(AVFilterLink *inlink) |
| { |
| CiescopeContext *s = inlink->dst->priv; |
| int i; |
| |
| get_rgb2xyz_matrix(color_systems[s->color_system], s->m); |
| invert_matrix3x3(s->m, s->i); |
| |
| switch (inlink->format) { |
| case AV_PIX_FMT_RGB24: |
| s->filter = filter_rgb24; |
| break; |
| case AV_PIX_FMT_RGBA: |
| s->filter = filter_rgba; |
| break; |
| case AV_PIX_FMT_RGB48: |
| s->filter = filter_rgb48; |
| break; |
| case AV_PIX_FMT_RGBA64: |
| s->filter = filter_rgba64; |
| break; |
| case AV_PIX_FMT_XYZ12: |
| s->filter = filter_xyz; |
| for (i = 0; i < 65536; i++) |
| s->log2lin[i] = pow(i / 65535., s->igamma) * 65535.; |
| break; |
| default: |
| av_assert0(0); |
| } |
| |
| return 0; |
| } |
| |
| static const AVFilterPad inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| .config_props = config_input, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_output, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_ciescope = { |
| .name = "ciescope", |
| .description = NULL_IF_CONFIG_SMALL("Video CIE scope."), |
| .priv_size = sizeof(CiescopeContext), |
| .priv_class = &ciescope_class, |
| .query_formats = query_formats, |
| .uninit = uninit, |
| .inputs = inputs, |
| .outputs = outputs, |
| }; |
