[FFmpeg-cvslog] avfilter: add ciescope filter
Paul B Mahol
git at videolan.org
Thu Mar 3 12:26:53 CET 2016
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Mon Feb 1 21:05:16 2016 +0100| [256fa2ab1b2878b116d3cf366832c046fc52d0b0] | committer: Paul B Mahol
avfilter: add ciescope filter
Signed-off-by: Paul B Mahol <onemda at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=256fa2ab1b2878b116d3cf366832c046fc52d0b0
---
Changelog | 1 +
doc/filters.texi | 55 ++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_ciescope.c | 1509 +++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 1568 insertions(+), 1 deletion(-)
diff --git a/Changelog b/Changelog
index 0677b33..d6459a8 100644
--- a/Changelog
+++ b/Changelog
@@ -9,6 +9,7 @@ version <next>:
- firequalizer filter
- datascope filter
- bench and abench filters
+- ciescope filter
version 3.0:
diff --git a/doc/filters.texi b/doc/filters.texi
index 6f378d7..a1591c6 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -4553,6 +4553,61 @@ ffmpeg -f lavfi -i color=c=black:s=1280x720 -i video.mp4 -shortest -filter_compl
@end example
@end itemize
+ at section ciescope
+
+Display CIE color diagram with pixels overlaid onto it.
+
+The filter acccepts the following options:
+
+ at table @option
+ at item system
+Set color system.
+
+ at table @samp
+ at item ntsc, 470m
+ at item ebu, 470bg
+ at item smpte
+ at item 240m
+ at item apple
+ at item widergb
+ at item cie1931
+ at item rec709, hdtv
+ at item uhdtv, rec2020
+ at end table
+
+ at item cie
+Set CIE system.
+
+ at table @samp
+ at item xyy
+ at item ucs
+ at item luv
+ at end table
+
+ at item gamuts
+Set what gamuts to draw.
+
+See @code{system} option for avaiable values.
+
+ at item size, s
+Set ciescope size, by default set to 512.
+
+ at item intensity, i
+Set intensity used to map input pixel values to CIE diagram.
+
+ at item contrast
+Set contrast used to draw tongue colors that are out of active color system gamut.
+
+ at item corrgamma
+Correct gamma displayed on scope, by default enabled.
+
+ at item showwhite
+Show white point on CIE diagram, by default disabled.
+
+ at item gamma
+Set input gamma. Used only with XYZ input color space.
+ at end table
+
@section codecview
Visualize information exported by some codecs.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index be4b3c1..956a077 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -124,6 +124,7 @@ OBJS-$(CONFIG_BLEND_FILTER) += vf_blend.o dualinput.o framesync
OBJS-$(CONFIG_BOXBLUR_FILTER) += vf_boxblur.o
OBJS-$(CONFIG_BWDIF_FILTER) += vf_bwdif.o
OBJS-$(CONFIG_CHROMAKEY_FILTER) += vf_chromakey.o
+OBJS-$(CONFIG_CIESCOPE_FILTER) += vf_ciescope.o
OBJS-$(CONFIG_CODECVIEW_FILTER) += vf_codecview.o
OBJS-$(CONFIG_COLORBALANCE_FILTER) += vf_colorbalance.o
OBJS-$(CONFIG_COLORCHANNELMIXER_FILTER) += vf_colorchannelmixer.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index d6145d6..e5080b5 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -145,6 +145,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(BOXBLUR, boxblur, vf);
REGISTER_FILTER(BWDIF, bwdif, vf);
REGISTER_FILTER(CHROMAKEY, chromakey, vf);
+ REGISTER_FILTER(CIESCOPE, ciescope, vf);
REGISTER_FILTER(CODECVIEW, codecview, vf);
REGISTER_FILTER(COLORBALANCE, colorbalance, vf);
REGISTER_FILTER(COLORCHANNELMIXER, colorchannelmixer, vf);
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 2611084..2cfba6b 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -30,7 +30,7 @@
#include "libavutil/version.h"
#define LIBAVFILTER_VERSION_MAJOR 6
-#define LIBAVFILTER_VERSION_MINOR 38
+#define LIBAVFILTER_VERSION_MINOR 39
#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
diff --git a/libavfilter/vf_ciescope.c b/libavfilter/vf_ciescope.c
new file mode 100644
index 0000000..d693ff7
--- /dev/null
+++ b/libavfilter/vf_ciescope.c
@@ -0,0 +1,1509 @@
+/*
+ * 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;
+
+ 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);
+
+ double 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 = wup;
+ wy = 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 = wu;
+ wy = 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, 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, 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, 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, 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, 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)
+ 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,
+};
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