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vf_ciescope.c
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1 /*
2  * Copyright (c) 2000 John Walker
3  * Copyright (c) 2016 Paul B Mahol
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/avassert.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/parseutils.h"
26 #include "libavutil/pixdesc.h"
27 #include "avfilter.h"
28 #include "formats.h"
29 #include "internal.h"
30 #include "video.h"
31 
32 enum CieSystem {
33  XYY,
34  UCS,
35  LUV,
36  NB_CIE
37 };
38 
39 enum ColorsSystems {
40  NTSCsystem,
41  EBUsystem,
42  SMPTEsystem,
43  SMPTE240Msystem,
44  APPLEsystem,
45  wRGBsystem,
46  CIE1931system,
47  Rec709system,
48  Rec2020system,
49  NB_CS
50 };
51 
52 typedef struct CiescopeContext {
53  const AVClass *class;
54  int color_system;
55  unsigned gamuts;
56  int size;
57  int show_white;
58  int correct_gamma;
59  int cie;
60  float intensity;
61  float contrast;
62  int background;
63 
64  double log2lin[65536];
65  double igamma;
66  double i[3][3];
67  double m[3][3];
68  AVFrame *f;
69  void (*filter)(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y);
70 } CiescopeContext;
71 
72 #define OFFSET(x) offsetof(CiescopeContext, x)
73 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
74 
75 static const AVOption ciescope_options[] = {
76  { "system", "set color system", OFFSET(color_system), AV_OPT_TYPE_INT, {.i64=Rec709system}, 0, NB_CS-1, FLAGS, "system" },
77  { "ntsc", "NTSC 1953 Y'I'O' (ITU-R BT.470 System M)", 0, AV_OPT_TYPE_CONST, {.i64=NTSCsystem}, 0, 0, FLAGS, "system" },
78  { "470m", "NTSC 1953 Y'I'O' (ITU-R BT.470 System M)", 0, AV_OPT_TYPE_CONST, {.i64=NTSCsystem}, 0, 0, FLAGS, "system" },
79  { "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" },
80  { "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" },
81  { "smpte", "SMPTE-C RGB", 0, AV_OPT_TYPE_CONST, {.i64=SMPTEsystem}, 0, 0, FLAGS, "system" },
82  { "240m", "SMPTE-240M Y'PbPr", 0, AV_OPT_TYPE_CONST, {.i64=SMPTE240Msystem},0, 0, FLAGS, "system" },
83  { "apple", "Apple RGB", 0, AV_OPT_TYPE_CONST, {.i64=APPLEsystem}, 0, 0, FLAGS, "system" },
84  { "widergb", "Adobe Wide Gamut RGB", 0, AV_OPT_TYPE_CONST, {.i64=wRGBsystem}, 0, 0, FLAGS, "system" },
85  { "cie1931", "CIE 1931 RGB", 0, AV_OPT_TYPE_CONST, {.i64=CIE1931system}, 0, 0, FLAGS, "system" },
86  { "hdtv", "ITU.BT-709 Y'CbCr", 0, AV_OPT_TYPE_CONST, {.i64=Rec709system}, 0, 0, FLAGS, "system" },
87  { "rec709", "ITU.BT-709 Y'CbCr", 0, AV_OPT_TYPE_CONST, {.i64=Rec709system}, 0, 0, FLAGS, "system" },
88  { "uhdtv", "ITU-R.BT-2020", 0, AV_OPT_TYPE_CONST, {.i64=Rec2020system}, 0, 0, FLAGS, "system" },
89  { "rec2020", "ITU-R.BT-2020", 0, AV_OPT_TYPE_CONST, {.i64=Rec2020system}, 0, 0, FLAGS, "system" },
90  { "cie", "set cie system", OFFSET(cie), AV_OPT_TYPE_INT, {.i64=XYY}, 0, NB_CIE-1, FLAGS, "cie" },
91  { "xyy", "CIE 1931 xyY", 0, AV_OPT_TYPE_CONST, {.i64=XYY}, 0, 0, FLAGS, "cie" },
92  { "ucs", "CIE 1960 UCS", 0, AV_OPT_TYPE_CONST, {.i64=UCS}, 0, 0, FLAGS, "cie" },
93  { "luv", "CIE 1976 Luv", 0, AV_OPT_TYPE_CONST, {.i64=LUV}, 0, 0, FLAGS, "cie" },
94  { "gamuts", "set what gamuts to draw", OFFSET(gamuts), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 0xFFF, FLAGS, "gamuts" },
95  { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<NTSCsystem}, 0, 0, FLAGS, "gamuts" },
96  { "470m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<NTSCsystem}, 0, 0, FLAGS, "gamuts" },
97  { "ebu", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<EBUsystem}, 0, 0, FLAGS, "gamuts" },
98  { "470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<EBUsystem}, 0, 0, FLAGS, "gamuts" },
99  { "smpte", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<SMPTEsystem}, 0, 0, FLAGS, "gamuts" },
100  { "240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<SMPTE240Msystem}, 0, 0, FLAGS, "gamuts" },
101  { "apple", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<APPLEsystem}, 0, 0, FLAGS, "gamuts" },
102  { "widergb", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<wRGBsystem}, 0, 0, FLAGS, "gamuts" },
103  { "cie1931", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<CIE1931system}, 0, 0, FLAGS, "gamuts" },
104  { "hdtv", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<Rec709system}, 0, 0, FLAGS, "gamuts" },
105  { "rec709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<Rec709system}, 0, 0, FLAGS, "gamuts" },
106  { "uhdtv", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<Rec2020system}, 0, 0, FLAGS, "gamuts" },
107  { "rec2020", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<Rec2020system}, 0, 0, FLAGS, "gamuts" },
108  { "size", "set ciescope size", OFFSET(size), AV_OPT_TYPE_INT, {.i64=512}, 256, 8192, FLAGS },
109  { "s", "set ciescope size", OFFSET(size), AV_OPT_TYPE_INT, {.i64=512}, 256, 8192, FLAGS },
110  { "intensity", "set ciescope intensity", OFFSET(intensity), AV_OPT_TYPE_FLOAT, {.dbl=0.001}, 0, 1, FLAGS },
111  { "i", "set ciescope intensity", OFFSET(intensity), AV_OPT_TYPE_FLOAT, {.dbl=0.001}, 0, 1, FLAGS },
112  { "contrast", NULL, OFFSET(contrast), AV_OPT_TYPE_FLOAT, {.dbl=0.75}, 0, 1, FLAGS },
113  { "corrgamma", NULL, OFFSET(correct_gamma), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
114  { "showwhite", NULL, OFFSET(show_white), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
115  { "gamma", NULL, OFFSET(igamma), AV_OPT_TYPE_DOUBLE, {.dbl=2.6}, 0.1, 6, FLAGS },
116  { NULL }
117 };
118 
119 AVFILTER_DEFINE_CLASS(ciescope);
120 
121 static const enum AVPixelFormat in_pix_fmts[] = {
122  AV_PIX_FMT_RGB24,
123  AV_PIX_FMT_RGBA,
124  AV_PIX_FMT_RGB48,
125  AV_PIX_FMT_RGBA64,
126  AV_PIX_FMT_XYZ12,
127  AV_PIX_FMT_NONE
128 };
129 
130 static const enum AVPixelFormat out_pix_fmts[] = {
131  AV_PIX_FMT_RGBA64,
132  AV_PIX_FMT_NONE
133 };
134 
135 static int query_formats(AVFilterContext *ctx)
136 {
137  int ret;
138 
139  if ((ret = ff_formats_ref(ff_make_format_list(in_pix_fmts), &ctx->inputs[0]->out_formats)) < 0)
140  return ret;
141 
142  if ((ret = ff_formats_ref(ff_make_format_list(out_pix_fmts), &ctx->outputs[0]->in_formats)) < 0)
143  return ret;
144 
145  return 0;
146 }
147 
148 static int config_output(AVFilterLink *outlink)
149 {
150  CiescopeContext *s = outlink->src->priv;
151 
152  outlink->h = outlink->w = s->size;
153  outlink->sample_aspect_ratio = (AVRational){1,1};
154 
155  return 0;
156 }
157 
158 /* A color system is defined by the CIE x and y coordinates of its
159  three primary illuminants and the x and y coordinates of the white
160  point. */
161 
162 struct ColorSystem {
163  double xRed, yRed, /* Red primary illuminant */
164  xGreen, yGreen, /* Green primary illuminant */
165  xBlue, yBlue, /* Blue primary illuminant */
166  xWhite, yWhite, /* White point */
167  gamma; /* gamma of nonlinear correction */
168 };
169 
170 static float const spectral_chromaticity[][3] = {
171  { 0.175560, 0.005294, 0.819146 },
172  { 0.175483, 0.005286, 0.819231 },
173  { 0.175400, 0.005279, 0.819321 },
174  { 0.175317, 0.005271, 0.819412 },
175  { 0.175237, 0.005263, 0.819500 },
176  { 0.175161, 0.005256, 0.819582 },
177  { 0.175088, 0.005247, 0.819665 },
178  { 0.175015, 0.005236, 0.819749 },
179  { 0.174945, 0.005226, 0.819829 },
180  { 0.174880, 0.005221, 0.819899 },
181  { 0.174821, 0.005221, 0.819959 },
182  { 0.174770, 0.005229, 0.820001 },
183  { 0.174722, 0.005238, 0.820040 },
184  { 0.174665, 0.005236, 0.820098 },
185  { 0.174595, 0.005218, 0.820187 },
186  { 0.174510, 0.005182, 0.820309 },
187  { 0.174409, 0.005127, 0.820464 },
188  { 0.174308, 0.005068, 0.820624 },
189  { 0.174222, 0.005017, 0.820761 },
190  { 0.174156, 0.004981, 0.820863 },
191  { 0.174112, 0.004964, 0.820924 },
192  { 0.174088, 0.004964, 0.820948 },
193  { 0.174073, 0.004973, 0.820955 },
194  { 0.174057, 0.004982, 0.820961 },
195  { 0.174036, 0.004986, 0.820978 },
196  { 0.174008, 0.004981, 0.821012 },
197  { 0.173972, 0.004964, 0.821064 },
198  { 0.173932, 0.004943, 0.821125 },
199  { 0.173889, 0.004926, 0.821185 },
200  { 0.173845, 0.004916, 0.821239 },
201  { 0.173801, 0.004915, 0.821284 },
202  { 0.173754, 0.004925, 0.821321 },
203  { 0.173705, 0.004937, 0.821358 },
204  { 0.173655, 0.004944, 0.821401 },
205  { 0.173606, 0.004940, 0.821454 },
206  { 0.173560, 0.004923, 0.821517 },
207  { 0.173514, 0.004895, 0.821590 },
208  { 0.173468, 0.004865, 0.821667 },
209  { 0.173424, 0.004836, 0.821740 },
210  { 0.173380, 0.004813, 0.821807 },
211  { 0.173337, 0.004797, 0.821866 },
212  { 0.173291, 0.004786, 0.821923 },
213  { 0.173238, 0.004779, 0.821983 },
214  { 0.173174, 0.004775, 0.822051 },
215  { 0.173101, 0.004774, 0.822125 },
216  { 0.173021, 0.004775, 0.822204 },
217  { 0.172934, 0.004781, 0.822285 },
218  { 0.172843, 0.004791, 0.822366 },
219  { 0.172751, 0.004799, 0.822450 },
220  { 0.172662, 0.004802, 0.822536 },
221  { 0.172577, 0.004799, 0.822624 },
222  { 0.172489, 0.004795, 0.822715 },
223  { 0.172396, 0.004796, 0.822808 },
224  { 0.172296, 0.004803, 0.822901 },
225  { 0.172192, 0.004815, 0.822993 },
226  { 0.172087, 0.004833, 0.823081 },
227  { 0.171982, 0.004855, 0.823163 },
228  { 0.171871, 0.004889, 0.823240 },
229  { 0.171741, 0.004939, 0.823319 },
230  { 0.171587, 0.005010, 0.823402 },
231  { 0.171407, 0.005102, 0.823490 },
232  { 0.171206, 0.005211, 0.823583 },
233  { 0.170993, 0.005334, 0.823674 },
234  { 0.170771, 0.005470, 0.823759 },
235  { 0.170541, 0.005621, 0.823838 },
236  { 0.170301, 0.005789, 0.823911 },
237  { 0.170050, 0.005974, 0.823976 },
238  { 0.169786, 0.006177, 0.824037 },
239  { 0.169505, 0.006398, 0.824097 },
240  { 0.169203, 0.006639, 0.824158 },
241  { 0.168878, 0.006900, 0.824222 },
242  { 0.168525, 0.007184, 0.824291 },
243  { 0.168146, 0.007491, 0.824363 },
244  { 0.167746, 0.007821, 0.824433 },
245  { 0.167328, 0.008175, 0.824496 },
246  { 0.166895, 0.008556, 0.824549 },
247  { 0.166446, 0.008964, 0.824589 },
248  { 0.165977, 0.009402, 0.824622 },
249  { 0.165483, 0.009865, 0.824652 },
250  { 0.164963, 0.010351, 0.824687 },
251  { 0.164412, 0.010858, 0.824731 },
252  { 0.163828, 0.011385, 0.824787 },
253  { 0.163210, 0.011937, 0.824853 },
254  { 0.162552, 0.012520, 0.824928 },
255  { 0.161851, 0.013137, 0.825011 },
256  { 0.161105, 0.013793, 0.825102 },
257  { 0.160310, 0.014491, 0.825199 },
258  { 0.159466, 0.015232, 0.825302 },
259  { 0.158573, 0.016015, 0.825412 },
260  { 0.157631, 0.016840, 0.825529 },
261  { 0.156641, 0.017705, 0.825654 },
262  { 0.155605, 0.018609, 0.825786 },
263  { 0.154525, 0.019556, 0.825920 },
264  { 0.153397, 0.020554, 0.826049 },
265  { 0.152219, 0.021612, 0.826169 },
266  { 0.150985, 0.022740, 0.826274 },
267  { 0.149691, 0.023950, 0.826359 },
268  { 0.148337, 0.025247, 0.826416 },
269  { 0.146928, 0.026635, 0.826437 },
270  { 0.145468, 0.028118, 0.826413 },
271  { 0.143960, 0.029703, 0.826337 },
272  { 0.142405, 0.031394, 0.826201 },
273  { 0.140796, 0.033213, 0.825991 },
274  { 0.139121, 0.035201, 0.825679 },
275  { 0.137364, 0.037403, 0.825233 },
276  { 0.135503, 0.039879, 0.824618 },
277  { 0.133509, 0.042692, 0.823798 },
278  { 0.131371, 0.045876, 0.822753 },
279  { 0.129086, 0.049450, 0.821464 },
280  { 0.126662, 0.053426, 0.819912 },
281  { 0.124118, 0.057803, 0.818079 },
282  { 0.121469, 0.062588, 0.815944 },
283  { 0.118701, 0.067830, 0.813468 },
284  { 0.115807, 0.073581, 0.810612 },
285  { 0.112776, 0.079896, 0.807328 },
286  { 0.109594, 0.086843, 0.803563 },
287  { 0.106261, 0.094486, 0.799253 },
288  { 0.102776, 0.102864, 0.794360 },
289  { 0.099128, 0.112007, 0.788865 },
290  { 0.095304, 0.121945, 0.782751 },
291  { 0.091294, 0.132702, 0.776004 },
292  { 0.087082, 0.144317, 0.768601 },
293  { 0.082680, 0.156866, 0.760455 },
294  { 0.078116, 0.170420, 0.751464 },
295  { 0.073437, 0.185032, 0.741531 },
296  { 0.068706, 0.200723, 0.730571 },
297  { 0.063993, 0.217468, 0.718539 },
298  { 0.059316, 0.235254, 0.705430 },
299  { 0.054667, 0.254096, 0.691238 },
300  { 0.050031, 0.274002, 0.675967 },
301  { 0.045391, 0.294976, 0.659633 },
302  { 0.040757, 0.316981, 0.642262 },
303  { 0.036195, 0.339900, 0.623905 },
304  { 0.031756, 0.363598, 0.604646 },
305  { 0.027494, 0.387921, 0.584584 },
306  { 0.023460, 0.412703, 0.563837 },
307  { 0.019705, 0.437756, 0.542539 },
308  { 0.016268, 0.462955, 0.520777 },
309  { 0.013183, 0.488207, 0.498610 },
310  { 0.010476, 0.513404, 0.476120 },
311  { 0.008168, 0.538423, 0.453409 },
312  { 0.006285, 0.563068, 0.430647 },
313  { 0.004875, 0.587116, 0.408008 },
314  { 0.003982, 0.610447, 0.385570 },
315  { 0.003636, 0.633011, 0.363352 },
316  { 0.003859, 0.654823, 0.341318 },
317  { 0.004646, 0.675898, 0.319456 },
318  { 0.006011, 0.696120, 0.297869 },
319  { 0.007988, 0.715342, 0.276670 },
320  { 0.010603, 0.733413, 0.255984 },
321  { 0.013870, 0.750186, 0.235943 },
322  { 0.017766, 0.765612, 0.216622 },
323  { 0.022244, 0.779630, 0.198126 },
324  { 0.027273, 0.792104, 0.180623 },
325  { 0.032820, 0.802926, 0.164254 },
326  { 0.038852, 0.812016, 0.149132 },
327  { 0.045328, 0.819391, 0.135281 },
328  { 0.052177, 0.825164, 0.122660 },
329  { 0.059326, 0.829426, 0.111249 },
330  { 0.066716, 0.832274, 0.101010 },
331  { 0.074302, 0.833803, 0.091894 },
332  { 0.082053, 0.834090, 0.083856 },
333  { 0.089942, 0.833289, 0.076769 },
334  { 0.097940, 0.831593, 0.070468 },
335  { 0.106021, 0.829178, 0.064801 },
336  { 0.114161, 0.826207, 0.059632 },
337  { 0.122347, 0.822770, 0.054882 },
338  { 0.130546, 0.818928, 0.050526 },
339  { 0.138702, 0.814774, 0.046523 },
340  { 0.146773, 0.810395, 0.042832 },
341  { 0.154722, 0.805864, 0.039414 },
342  { 0.162535, 0.801238, 0.036226 },
343  { 0.170237, 0.796519, 0.033244 },
344  { 0.177850, 0.791687, 0.030464 },
345  { 0.185391, 0.786728, 0.027881 },
346  { 0.192876, 0.781629, 0.025495 },
347  { 0.200309, 0.776399, 0.023292 },
348  { 0.207690, 0.771055, 0.021255 },
349  { 0.215030, 0.765595, 0.019375 },
350  { 0.222337, 0.760020, 0.017643 },
351  { 0.229620, 0.754329, 0.016051 },
352  { 0.236885, 0.748524, 0.014591 },
353  { 0.244133, 0.742614, 0.013253 },
354  { 0.251363, 0.736606, 0.012031 },
355  { 0.258578, 0.730507, 0.010916 },
356  { 0.265775, 0.724324, 0.009901 },
357  { 0.272958, 0.718062, 0.008980 },
358  { 0.280129, 0.711725, 0.008146 },
359  { 0.287292, 0.705316, 0.007391 },
360  { 0.294450, 0.698842, 0.006708 },
361  { 0.301604, 0.692308, 0.006088 },
362  { 0.308760, 0.685712, 0.005528 },
363  { 0.315914, 0.679063, 0.005022 },
364  { 0.323066, 0.672367, 0.004566 },
365  { 0.330216, 0.665628, 0.004156 },
366  { 0.337363, 0.658848, 0.003788 },
367  { 0.344513, 0.652028, 0.003459 },
368  { 0.351664, 0.645172, 0.003163 },
369  { 0.358814, 0.638287, 0.002899 },
370  { 0.365959, 0.631379, 0.002662 },
371  { 0.373102, 0.624451, 0.002448 },
372  { 0.380244, 0.617502, 0.002254 },
373  { 0.387379, 0.610542, 0.002079 },
374  { 0.394507, 0.603571, 0.001922 },
375  { 0.401626, 0.596592, 0.001782 },
376  { 0.408736, 0.589607, 0.001657 },
377  { 0.415836, 0.582618, 0.001546 },
378  { 0.422921, 0.575631, 0.001448 },
379  { 0.429989, 0.568649, 0.001362 },
380  { 0.437036, 0.561676, 0.001288 },
381  { 0.444062, 0.554714, 0.001224 },
382  { 0.451065, 0.547766, 0.001169 },
383  { 0.458041, 0.540837, 0.001123 },
384  { 0.464986, 0.533930, 0.001084 },
385  { 0.471899, 0.527051, 0.001051 },
386  { 0.478775, 0.520202, 0.001023 },
387  { 0.485612, 0.513389, 0.001000 },
388  { 0.492405, 0.506615, 0.000980 },
389  { 0.499151, 0.499887, 0.000962 },
390  { 0.505845, 0.493211, 0.000944 },
391  { 0.512486, 0.486591, 0.000923 },
392  { 0.519073, 0.480029, 0.000899 },
393  { 0.525600, 0.473527, 0.000872 },
394  { 0.532066, 0.467091, 0.000843 },
395  { 0.538463, 0.460725, 0.000812 },
396  { 0.544787, 0.454434, 0.000779 },
397  { 0.551031, 0.448225, 0.000744 },
398  { 0.557193, 0.442099, 0.000708 },
399  { 0.563269, 0.436058, 0.000673 },
400  { 0.569257, 0.430102, 0.000641 },
401  { 0.575151, 0.424232, 0.000616 },
402  { 0.580953, 0.418447, 0.000601 },
403  { 0.586650, 0.412758, 0.000591 },
404  { 0.592225, 0.407190, 0.000586 },
405  { 0.597658, 0.401762, 0.000580 },
406  { 0.602933, 0.396497, 0.000571 },
407  { 0.608035, 0.391409, 0.000556 },
408  { 0.612977, 0.386486, 0.000537 },
409  { 0.617779, 0.381706, 0.000516 },
410  { 0.622459, 0.377047, 0.000493 },
411  { 0.627037, 0.372491, 0.000472 },
412  { 0.631521, 0.368026, 0.000453 },
413  { 0.635900, 0.363665, 0.000435 },
414  { 0.640156, 0.359428, 0.000416 },
415  { 0.644273, 0.355331, 0.000396 },
416  { 0.648233, 0.351395, 0.000372 },
417  { 0.652028, 0.347628, 0.000344 },
418  { 0.655669, 0.344018, 0.000313 },
419  { 0.659166, 0.340553, 0.000281 },
420  { 0.662528, 0.337221, 0.000251 },
421  { 0.665764, 0.334011, 0.000226 },
422  { 0.668874, 0.330919, 0.000207 },
423  { 0.671859, 0.327947, 0.000194 },
424  { 0.674720, 0.325095, 0.000185 },
425  { 0.677459, 0.322362, 0.000179 },
426  { 0.680079, 0.319747, 0.000174 },
427  { 0.682582, 0.317249, 0.000170 },
428  { 0.684971, 0.314863, 0.000167 },
429  { 0.687250, 0.312586, 0.000164 },
430  { 0.689426, 0.310414, 0.000160 },
431  { 0.691504, 0.308342, 0.000154 },
432  { 0.693490, 0.306366, 0.000145 },
433  { 0.695389, 0.304479, 0.000133 },
434  { 0.697206, 0.302675, 0.000119 },
435  { 0.698944, 0.300950, 0.000106 },
436  { 0.700606, 0.299301, 0.000093 },
437  { 0.702193, 0.297725, 0.000083 },
438  { 0.703709, 0.296217, 0.000074 },
439  { 0.705163, 0.294770, 0.000067 },
440  { 0.706563, 0.293376, 0.000061 },
441  { 0.707918, 0.292027, 0.000055 },
442  { 0.709231, 0.290719, 0.000050 },
443  { 0.710500, 0.289453, 0.000047 },
444  { 0.711724, 0.288232, 0.000044 },
445  { 0.712901, 0.287057, 0.000041 },
446  { 0.714032, 0.285929, 0.000040 },
447  { 0.715117, 0.284845, 0.000038 },
448  { 0.716159, 0.283804, 0.000036 },
449  { 0.717159, 0.282806, 0.000035 },
450  { 0.718116, 0.281850, 0.000034 },
451  { 0.719033, 0.280935, 0.000032 },
452  { 0.719912, 0.280058, 0.000030 },
453  { 0.720753, 0.279219, 0.000028 },
454  { 0.721555, 0.278420, 0.000026 },
455  { 0.722315, 0.277662, 0.000023 },
456  { 0.723032, 0.276948, 0.000020 },
457  { 0.723702, 0.276282, 0.000016 },
458  { 0.724328, 0.275660, 0.000012 },
459  { 0.724914, 0.275078, 0.000007 },
460  { 0.725467, 0.274530, 0.000003 },
461  { 0.725992, 0.274008, 0.000000 },
462  { 0.726495, 0.273505, 0.000000 },
463  { 0.726975, 0.273025, 0.000000 },
464  { 0.727432, 0.272568, 0.000000 },
465  { 0.727864, 0.272136, 0.000000 },
466  { 0.728272, 0.271728, 0.000000 },
467  { 0.728656, 0.271344, 0.000000 },
468  { 0.729020, 0.270980, 0.000000 },
469  { 0.729361, 0.270639, 0.000000 },
470  { 0.729678, 0.270322, 0.000000 },
471  { 0.729969, 0.270031, 0.000000 },
472  { 0.730234, 0.269766, 0.000000 },
473  { 0.730474, 0.269526, 0.000000 },
474  { 0.730693, 0.269307, 0.000000 },
475  { 0.730896, 0.269104, 0.000000 },
476  { 0.731089, 0.268911, 0.000000 },
477  { 0.731280, 0.268720, 0.000000 },
478  { 0.731467, 0.268533, 0.000000 },
479  { 0.731650, 0.268350, 0.000000 },
480  { 0.731826, 0.268174, 0.000000 },
481  { 0.731993, 0.268007, 0.000000 },
482  { 0.732150, 0.267850, 0.000000 },
483  { 0.732300, 0.267700, 0.000000 },
484  { 0.732443, 0.267557, 0.000000 },
485  { 0.732581, 0.267419, 0.000000 },
486  { 0.732719, 0.267281, 0.000000 },
487  { 0.732859, 0.267141, 0.000000 },
488  { 0.733000, 0.267000, 0.000000 },
489  { 0.733142, 0.266858, 0.000000 },
490  { 0.733281, 0.266719, 0.000000 },
491  { 0.733417, 0.266583, 0.000000 },
492  { 0.733551, 0.266449, 0.000000 },
493  { 0.733683, 0.266317, 0.000000 },
494  { 0.733813, 0.266187, 0.000000 },
495  { 0.733936, 0.266064, 0.000000 },
496  { 0.734047, 0.265953, 0.000000 },
497  { 0.734143, 0.265857, 0.000000 },
498  { 0.734221, 0.265779, 0.000000 },
499  { 0.734286, 0.265714, 0.000000 },
500  { 0.734341, 0.265659, 0.000000 },
501  { 0.734390, 0.265610, 0.000000 },
502  { 0.734438, 0.265562, 0.000000 },
503  { 0.734482, 0.265518, 0.000000 },
504  { 0.734523, 0.265477, 0.000000 },
505  { 0.734560, 0.265440, 0.000000 },
506  { 0.734592, 0.265408, 0.000000 },
507  { 0.734621, 0.265379, 0.000000 },
508  { 0.734649, 0.265351, 0.000000 },
509  { 0.734673, 0.265327, 0.000000 },
510  { 0.734690, 0.265310, 0.000000 },
511  { 0.734690, 0.265310, 0.000000 },
512  { 0.734690, 0.265310, 0.000000 },
513  { 0.734690, 0.265310, 0.000000 },
514  { 0.734690, 0.265310, 0.000000 },
515  { 0.734690, 0.265310, 0.000000 },
516  { 0.734690, 0.265310, 0.000000 },
517  { 0.734690, 0.265310, 0.000000 },
518  { 0.734690, 0.265310, 0.000000 },
519  { 0.734690, 0.265310, 0.000000 },
520  { 0.734690, 0.265310, 0.000000 },
521  { 0.734690, 0.265310, 0.000000 },
522  { 0.734690, 0.265310, 0.000000 },
523  { 0.734690, 0.265310, 0.000000 },
524  { 0.734690, 0.265310, 0.000000 },
525  { 0.734690, 0.265310, 0.000000 },
526  { 0.734690, 0.265310, 0.000000 },
527  { 0.734690, 0.265310, 0.000000 },
528  { 0.734690, 0.265310, 0.000000 },
529  { 0.734690, 0.265310, 0.000000 },
530  { 0.734690, 0.265310, 0.000000 },
531  { 0.734690, 0.265310, 0.000000 },
532  { 0.734690, 0.265310, 0.000000 },
533  { 0.734690, 0.265310, 0.000000 },
534  { 0.734690, 0.265310, 0.000000 },
535  { 0.734690, 0.265310, 0.000000 },
536  { 0.734690, 0.265310, 0.000000 },
537  { 0.734690, 0.265310, 0.000000 },
538  { 0.734690, 0.265310, 0.000000 },
539  { 0.734690, 0.265310, 0.000000 },
540  { 0.734690, 0.265310, 0.000000 },
541  { 0.734690, 0.265310, 0.000000 },
542  { 0.734690, 0.265310, 0.000000 },
543  { 0.734690, 0.265310, 0.000000 },
544  { 0.734690, 0.265310, 0.000000 },
545  { 0.734690, 0.265310, 0.000000 },
546  { 0.734690, 0.265310, 0.000000 },
547  { 0.734690, 0.265310, 0.000000 },
548  { 0.734690, 0.265310, 0.000000 },
549  { 0.734690, 0.265310, 0.000000 },
550  { 0.734690, 0.265310, 0.000000 },
551  { 0.734690, 0.265310, 0.000000 },
552  { 0.734690, 0.265310, 0.000000 },
553  { 0.734690, 0.265310, 0.000000 },
554  { 0.734690, 0.265310, 0.000000 },
555  { 0.734690, 0.265310, 0.000000 },
556  { 0.734690, 0.265310, 0.000000 },
557  { 0.734690, 0.265310, 0.000000 },
558  { 0.734690, 0.265310, 0.000000 },
559  { 0.734690, 0.265310, 0.000000 },
560  { 0.734690, 0.265310, 0.000000 },
561  { 0.734690, 0.265310, 0.000000 },
562  { 0.734690, 0.265310, 0.000000 },
563  { 0.734690, 0.265310, 0.000000 },
564  { 0.734690, 0.265310, 0.000000 },
565  { 0.734690, 0.265310, 0.000000 },
566  { 0.734690, 0.265310, 0.000000 },
567  { 0.734690, 0.265310, 0.000000 },
568  { 0.734690, 0.265310, 0.000000 },
569  { 0.734690, 0.265310, 0.000000 },
570  { 0.734690, 0.265310, 0.000000 },
571  { 0.734690, 0.265310, 0.000000 },
572  { 0.734690, 0.265310, 0.000000 },
573  { 0.734690, 0.265310, 0.000000 },
574  { 0.734690, 0.265310, 0.000000 },
575  { 0.734690, 0.265310, 0.000000 },
576  { 0.734690, 0.265310, 0.000000 },
577  { 0.734690, 0.265310, 0.000000 },
578  { 0.734690, 0.265310, 0.000000 },
579  { 0.734690, 0.265310, 0.000000 },
580  { 0.734690, 0.265310, 0.000000 },
581  { 0.734690, 0.265310, 0.000000 },
582  { 0.734690, 0.265310, 0.000000 },
583  { 0.734690, 0.265310, 0.000000 },
584  { 0.734690, 0.265310, 0.000000 },
585  { 0.734690, 0.265310, 0.000000 },
586  { 0.734690, 0.265310, 0.000000 },
587  { 0.734690, 0.265310, 0.000000 },
588  { 0.734690, 0.265310, 0.000000 },
589  { 0.734690, 0.265310, 0.000000 },
590  { 0.734690, 0.265310, 0.000000 },
591  { 0.734690, 0.265310, 0.000000 },
592  { 0.734690, 0.265310, 0.000000 },
593  { 0.734690, 0.265310, 0.000000 },
594  { 0.734690, 0.265310, 0.000000 },
595  { 0.734690, 0.265310, 0.000000 },
596  { 0.734690, 0.265310, 0.000000 },
597  { 0.734690, 0.265310, 0.000000 },
598  { 0.734690, 0.265310, 0.000000 },
599  { 0.734690, 0.265310, 0.000000 },
600  { 0.734690, 0.265310, 0.000000 },
601  { 0.734690, 0.265310, 0.000000 },
602  { 0.734690, 0.265310, 0.000000 },
603  { 0.734690, 0.265310, 0.000000 },
604  { 0.734690, 0.265310, 0.000000 },
605  { 0.734690, 0.265310, 0.000000 },
606  { 0.734690, 0.265310, 0.000000 },
607  { 0.734690, 0.265310, 0.000000 },
608  { 0.734690, 0.265310, 0.000000 },
609  { 0.734690, 0.265310, 0.000000 },
610  { 0.734690, 0.265310, 0.000000 },
611  { 0.734690, 0.265310, 0.000000 },
612  { 0.734690, 0.265310, 0.000000 },
613  { 0.734690, 0.265310, 0.000000 },
614  { 0.734690, 0.265310, 0.000000 },
615  { 0.734690, 0.265310, 0.000000 },
616  { 0.734690, 0.265310, 0.000000 },
617  { 0.734690, 0.265310, 0.000000 },
618  { 0.734690, 0.265310, 0.000000 },
619  { 0.734690, 0.265310, 0.000000 },
620  { 0.734690, 0.265310, 0.000000 },
621  { 0.734690, 0.265310, 0.000000 },
622  { 0.734690, 0.265310, 0.000000 },
623  { 0.734690, 0.265310, 0.000000 },
624  { 0.734690, 0.265310, 0.000000 },
625  { 0.734690, 0.265310, 0.000000 },
626  { 0.734690, 0.265310, 0.000000 },
627  { 0.734690, 0.265310, 0.000000 },
628  { 0.734690, 0.265310, 0.000000 },
629  { 0.734690, 0.265310, 0.000000 },
630  { 0.734690, 0.265310, 0.000000 },
631  { 0.734690, 0.265310, 0.000000 },
632  { 0.734690, 0.265310, 0.000000 },
633  { 0.734690, 0.265310, 0.000000 },
634  { 0.734690, 0.265310, 0.000000 },
635  { 0.734690, 0.265310, 0.000000 },
636  { 0.734690, 0.265310, 0.000000 },
637  { 0.734690, 0.265310, 0.000000 },
638  { 0.734690, 0.265310, 0.000000 },
639  { 0.734690, 0.265310, 0.000000 },
640  { 0.734690, 0.265310, 0.000000 },
641  { 0.734690, 0.265310, 0.000000 },
642 };
643 
644 
645 /* Standard white point chromaticities. */
646 
647 #define C 0.310063, 0.316158
648 #define E 1.0/3.0, 1.0/3.0
649 #define D50 0.34570, 0.3585
650 #define D65 0.312713, 0.329016
651 
652 /* Gamma of nonlinear correction.
653  See Charles Poynton's ColorFAQ Item 45 and GammaFAQ Item 6 at
654  http://www.inforamp.net/~poynton/ColorFAQ.html
655  http://www.inforamp.net/~poynton/GammaFAQ.html
656 */
657 
658 #define GAMMA_REC709 0. /* Rec. 709 */
659 
660 static const struct ColorSystem color_systems[] = {
661  [NTSCsystem] = {
662  0.67, 0.33, 0.21, 0.71, 0.14, 0.08,
663  C, GAMMA_REC709
664  },
665  [EBUsystem] = {
666  0.64, 0.33, 0.29, 0.60, 0.15, 0.06,
667  D65, GAMMA_REC709
668  },
669  [SMPTEsystem] = {
670  0.630, 0.340, 0.310, 0.595, 0.155, 0.070,
671  D65, GAMMA_REC709
672  },
673  [SMPTE240Msystem] = {
674  0.670, 0.330, 0.210, 0.710, 0.150, 0.060,
675  D65, GAMMA_REC709
676  },
677  [APPLEsystem] = {
678  0.625, 0.340, 0.280, 0.595, 0.115, 0.070,
679  D65, GAMMA_REC709
680  },
681  [wRGBsystem] = {
682  0.7347, 0.2653, 0.1152, 0.8264, 0.1566, 0.0177,
683  D50, GAMMA_REC709
684  },
685  [CIE1931system] = {
686  0.7347, 0.2653, 0.2738, 0.7174, 0.1666, 0.0089,
687  E, GAMMA_REC709
688  },
689  [Rec709system] = {
690  0.64, 0.33, 0.30, 0.60, 0.15, 0.06,
691  D65, GAMMA_REC709
692  },
693  [Rec2020system] = {
694  0.708, 0.292, 0.170, 0.797, 0.131, 0.046,
695  D65, GAMMA_REC709
696  },
697 };
698 
699 /*
700 static struct ColorSystem CustomSystem = {
701  "Custom",
702  0.64, 0.33, 0.30, 0.60, 0.15, 0.06,
703  D65, GAMMA_REC709
704 };
705 */
706 
707 static void
708 uv_to_xy(double const u,
709  double const v,
710  double * const xc,
711  double * const yc)
712 {
713 /*
714  Given 1970 coordinates u, v, determine 1931 chromaticities x, y
715 */
716  *xc = 3*u / (2*u - 8*v + 4);
717  *yc = 2*v / (2*u - 8*v + 4);
718 }
719 
720 static void
721 upvp_to_xy(double const up,
722  double const vp,
723  double * const xc,
724  double * const yc)
725 {
726 /*
727  Given 1976 coordinates u', v', determine 1931 chromaticities x, y
728 */
729  *xc = 9*up / (6*up - 16*vp + 12);
730  *yc = 4*vp / (6*up - 16*vp + 12);
731 }
732 
733 static void
734 xy_to_upvp(double xc,
735  double yc,
736  double * const up,
737  double * const vp)
738 {
739 /*
740  Given 1931 chromaticities x, y, determine 1976 coordinates u', v'
741 */
742  *up = 4*xc / (- 2*xc + 12*yc + 3);
743  *vp = 9*yc / (- 2*xc + 12*yc + 3);
744 }
745 
746 static void
747 xy_to_uv(double xc,
748  double yc,
749  double * const u,
750  double * const v)
751 {
752 /*
753  Given 1931 chromaticities x, y, determine 1960 coordinates u, v
754 */
755  *u = 4*xc / (- 2*xc + 12*yc + 3);
756  *v = 6*yc / (- 2*xc + 12*yc + 3);
757 }
758 
759 static void
760 xyz_to_rgb(const double m[3][3],
761  double xc, double yc, double zc,
762  double * const r, double * const g, double * const b)
763 {
764  *r = m[0][0]*xc + m[0][1]*yc + m[0][2]*zc;
765  *g = m[1][0]*xc + m[1][1]*yc + m[1][2]*zc;
766  *b = m[2][0]*xc + m[2][1]*yc + m[2][2]*zc;
767 }
768 
769 static void invert_matrix3x3(double in[3][3], double out[3][3])
770 {
771  double m00 = in[0][0], m01 = in[0][1], m02 = in[0][2],
772  m10 = in[1][0], m11 = in[1][1], m12 = in[1][2],
773  m20 = in[2][0], m21 = in[2][1], m22 = in[2][2];
774  int i, j;
775  double det;
776 
777  out[0][0] = (m11 * m22 - m21 * m12);
778  out[0][1] = -(m01 * m22 - m21 * m02);
779  out[0][2] = (m01 * m12 - m11 * m02);
780  out[1][0] = -(m10 * m22 - m20 * m12);
781  out[1][1] = (m00 * m22 - m20 * m02);
782  out[1][2] = -(m00 * m12 - m10 * m02);
783  out[2][0] = (m10 * m21 - m20 * m11);
784  out[2][1] = -(m00 * m21 - m20 * m01);
785  out[2][2] = (m00 * m11 - m10 * m01);
786 
787  det = m00 * out[0][0] + m10 * out[0][1] + m20 * out[0][2];
788  det = 1.0 / det;
789 
790  for (i = 0; i < 3; i++) {
791  for (j = 0; j < 3; j++)
792  out[i][j] *= det;
793  }
794 }
795 
796 static void get_rgb2xyz_matrix(struct ColorSystem system, double m[3][3])
797 {
798  double S[3], X[4], Z[4];
799  int i;
800 
801  X[0] = system.xRed / system.yRed;
802  X[1] = system.xGreen / system.yGreen;
803  X[2] = system.xBlue / system.yBlue;
804  X[3] = system.xWhite / system.yWhite;
805 
806  Z[0] = (1 - system.xRed - system.yRed) / system.yRed;
807  Z[1] = (1 - system.xGreen - system.yGreen) / system.yGreen;
808  Z[2] = (1 - system.xBlue - system.yBlue) / system.yBlue;
809  Z[3] = (1 - system.xWhite - system.yWhite) / system.yWhite;
810 
811  for (i = 0; i < 3; i++) {
812  m[0][i] = X[i];
813  m[1][i] = 1;
814  m[2][i] = Z[i];
815  }
816 
817  invert_matrix3x3(m, m);
818 
819  for (i = 0; i < 3; i++)
820  S[i] = m[i][0] * X[3] + m[i][1] * 1 + m[i][2] * Z[3];
821 
822  for (i = 0; i < 3; i++) {
823  m[0][i] = S[i] * X[i];
824  m[1][i] = S[i] * 1;
825  m[2][i] = S[i] * Z[i];
826  }
827 }
828 
829 static void
830 rgb_to_xy(double rc,
831  double gc,
832  double bc,
833  double * const x,
834  double * const y,
835  double * const z,
836  const double m[3][3])
837 {
838  double sum;
839 
840  *x = m[0][0] * rc + m[0][1] * gc + m[0][2] * bc;
841  *y = m[1][0] * rc + m[1][1] * gc + m[1][2] * bc;
842  *z = m[2][0] * rc + m[2][1] * gc + m[2][2] * bc;
843 
844  sum = *x + *y + *z;
845 
846  *x = *x / sum;
847  *y = *y / sum;
848 }
849 
850 static int
851 constrain_rgb(double * const r,
852  double * const g,
853  double * const b)
854 {
855 /*----------------------------------------------------------------------------
856  If the requested RGB shade contains a negative weight for one of
857  the primaries, it lies outside the color gamut accessible from
858  the given triple of primaries. Desaturate it by adding white,
859  equal quantities of R, G, and B, enough to make RGB all positive.
860 -----------------------------------------------------------------------------*/
861  double w;
862 
863  /* Amount of white needed is w = - min(0, *r, *g, *b) */
864  w = (0 < *r) ? 0 : *r;
865  w = (w < *g) ? w : *g;
866  w = (w < *b) ? w : *b;
867  w = - w;
868 
869  /* Add just enough white to make r, g, b all positive. */
870  if (w > 0) {
871  *r += w; *g += w; *b += w;
872 
873  return 1; /* Color modified to fit RGB gamut */
874  }
875 
876  return 0; /* Color within RGB gamut */
877 }
878 
879 static void
880 gamma_correct(const struct ColorSystem * const cs,
881  double * const c)
882 {
883 /*----------------------------------------------------------------------------
884  Transform linear RGB values to nonlinear RGB values.
885 
886  Rec. 709 is ITU-R Recommendation BT. 709 (1990)
887  ``Basic Parameter Values for the HDTV Standard for the Studio and for
888  International Programme Exchange'', formerly CCIR Rec. 709.
889 
890  For details see
891  http://www.inforamp.net/~poynton/ColorFAQ.html
892  http://www.inforamp.net/~poynton/GammaFAQ.html
893 -----------------------------------------------------------------------------*/
894  double gamma;
895  double cc;
896 
897  gamma = cs->gamma;
898 
899  if (gamma == 0.) {
900  /* Rec. 709 gamma correction. */
901  cc = 0.018;
902  if (*c < cc) {
903  *c *= (1.099 * pow(cc, 0.45) - 0.099) / cc;
904  } else {
905  *c = 1.099 * pow(*c, 0.45) - 0.099;
906  }
907  } else {
908  /* Nonlinear color = (Linear color)^(1/gamma) */
909  *c = pow(*c, 1./gamma);
910  }
911 }
912 
913 
914 
915 static void
916 gamma_correct_rgb(const struct ColorSystem * const cs,
917  double * const r,
918  double * const g,
919  double * const b)
920 {
921  gamma_correct(cs, r);
922  gamma_correct(cs, g);
923  gamma_correct(cs, b);
924 }
925 
926 /* Sz(X) is the displacement in pixels of a displacement of X normalized
927  distance units. (A normalized distance unit is 1/512 of the smaller
928  dimension of the canvas)
929 */
930 #define Sz(x) (((x) * (int)FFMIN(w, h)) / 512)
931 
932 static void
933 monochrome_color_location(double waveLength, int w, int h,
934  int cie, int *xP, int *yP)
935 {
936  const int ix = waveLength - 360;
937  const double pX = spectral_chromaticity[ix][0];
938  const double pY = spectral_chromaticity[ix][1];
939  const double pZ = spectral_chromaticity[ix][2];
940  const double px = pX / (pX + pY + pZ);
941  const double py = pY / (pX + pY + pZ);
942 
943  if (cie == LUV) {
944  double up, vp;
945 
946  xy_to_upvp(px, py, &up, &vp);
947  *xP = up * (w - 1);
948  *yP = (h - 1) - vp * (h - 1);
949  } else if (cie == UCS) {
950  double u, v;
951 
952  xy_to_uv(px, py, &u, &v);
953  *xP = u * (w - 1);
954  *yP = (h - 1) - v * (h - 1);
955  } else if (cie == XYY) {
956  *xP = px * (w - 1);
957  *yP = (h - 1) - py * (h - 1);
958  } else {
959  av_assert0(0);
960  }
961 }
962 
963 static void
964 find_tongue(uint16_t* const pixels,
965  int const w,
966  int const linesize,
967  int const row,
968  int * const presentP,
969  int * const leftEdgeP,
970  int * const rightEdgeP)
971 {
972  int i;
973 
974  for (i = 0; i < w && pixels[row * linesize + i * 4 + 0] == 0; i++)
975  ;
976 
977  if (i >= w) {
978  *presentP = 0;
979  } else {
980  int j;
981  int const leftEdge = i;
982 
983  *presentP = 1;
984 
985  for (j = w - 1; j >= leftEdge && pixels[row * linesize + j * 4 + 0] == 0; j--)
986  ;
987 
988  *rightEdgeP = j;
989  *leftEdgeP = leftEdge;
990  }
991 }
992 
993 static void draw_line(uint16_t *const pixels, int linesize,
994  int x0, int y0, int x1, int y1,
995  int w, int h,
996  const uint16_t *const rgbcolor)
997 {
998  int dx = FFABS(x1 - x0), sx = x0 < x1 ? 1 : -1;
999  int dy = FFABS(y1 - y0), sy = y0 < y1 ? 1 : -1;
1000  int err = (dx > dy ? dx : -dy) / 2, e2;
1001 
1002  for (;;) {
1003  pixels[y0 * linesize + x0 * 4 + 0] = rgbcolor[0];
1004  pixels[y0 * linesize + x0 * 4 + 1] = rgbcolor[1];
1005  pixels[y0 * linesize + x0 * 4 + 2] = rgbcolor[2];
1006  pixels[y0 * linesize + x0 * 4 + 3] = rgbcolor[3];
1007 
1008  if (x0 == x1 && y0 == y1)
1009  break;
1010 
1011  e2 = err;
1012 
1013  if (e2 >-dx) {
1014  err -= dy;
1015  x0 += sx;
1016  }
1017 
1018  if (e2 < dy) {
1019  err += dx;
1020  y0 += sy;
1021  }
1022  }
1023 }
1024 
1025 static void draw_rline(uint16_t *const pixels, int linesize,
1026  int x0, int y0, int x1, int y1,
1027  int w, int h)
1028 {
1029  int dx = FFABS(x1 - x0), sx = x0 < x1 ? 1 : -1;
1030  int dy = FFABS(y1 - y0), sy = y0 < y1 ? 1 : -1;
1031  int err = (dx > dy ? dx : -dy) / 2, e2;
1032 
1033  for (;;) {
1034  pixels[y0 * linesize + x0 * 4 + 0] = 65535 - pixels[y0 * linesize + x0 * 4 + 0];
1035  pixels[y0 * linesize + x0 * 4 + 1] = 65535 - pixels[y0 * linesize + x0 * 4 + 1];
1036  pixels[y0 * linesize + x0 * 4 + 2] = 65535 - pixels[y0 * linesize + x0 * 4 + 2];
1037  pixels[y0 * linesize + x0 * 4 + 3] = 65535;
1038 
1039  if (x0 == x1 && y0 == y1)
1040  break;
1041 
1042  e2 = err;
1043 
1044  if (e2 >-dx) {
1045  err -= dy;
1046  x0 += sx;
1047  }
1048 
1049  if (e2 < dy) {
1050  err += dx;
1051  y0 += sy;
1052  }
1053  }
1054 }
1055 
1056 static void
1057 tongue_outline(uint16_t* const pixels,
1058  int const linesize,
1059  int const w,
1060  int const h,
1061  uint16_t const maxval,
1062  int const cie)
1063 {
1064  const uint16_t rgbcolor[4] = { maxval, maxval, maxval, maxval };
1065  int wavelength;
1066  int lx, ly;
1067  int fx, fy;
1068 
1069  for (wavelength = 360; wavelength <= 830; wavelength++) {
1070  int icx, icy;
1071 
1072  monochrome_color_location(wavelength, w, h, cie,
1073  &icx, &icy);
1074 
1075  if (wavelength > 360)
1076  draw_line(pixels, linesize, lx, ly, icx, icy, w, h, rgbcolor);
1077  else {
1078  fx = icx;
1079  fy = icy;
1080  }
1081  lx = icx;
1082  ly = icy;
1083  }
1084  draw_line(pixels, linesize, lx, ly, fx, fy, w, h, rgbcolor);
1085 }
1086 
1087 static void
1088 fill_in_tongue(uint16_t* const pixels,
1089  int const linesize,
1090  int const w,
1091  int const h,
1092  uint16_t const maxval,
1093  const struct ColorSystem * const cs,
1094  double const m[3][3],
1095  int const cie,
1096  int const correct_gamma,
1097  float const contrast)
1098 {
1099  int y;
1100 
1101  /* Scan the image line by line and fill the tongue outline
1102  with the RGB values determined by the color system for the x-y
1103  co-ordinates within the tongue.
1104  */
1105 
1106  for (y = 0; y < h; ++y) {
1107  int present; /* There is some tongue on this line */
1108  int leftEdge; /* x position of leftmost pixel in tongue on this line */
1109  int rightEdge; /* same, but rightmost */
1110 
1111  find_tongue(pixels, w, linesize, y, &present, &leftEdge, &rightEdge);
1112 
1113  if (present) {
1114  int x;
1115 
1116  for (x = leftEdge; x <= rightEdge; ++x) {
1117  double cx, cy, cz, jr, jg, jb, jmax;
1118  int r, g, b, mx = maxval;
1119 
1120  if (cie == LUV) {
1121  double up, vp;
1122  up = ((double) x) / (w - 1);
1123  vp = 1.0 - ((double) y) / (h - 1);
1124  upvp_to_xy(up, vp, &cx, &cy);
1125  cz = 1.0 - (cx + cy);
1126  } else if (cie == UCS) {
1127  double u, v;
1128  u = ((double) x) / (w - 1);
1129  v = 1.0 - ((double) y) / (h - 1);
1130  uv_to_xy(u, v, &cx, &cy);
1131  cz = 1.0 - (cx + cy);
1132  } else if (cie == XYY) {
1133  cx = ((double) x) / (w - 1);
1134  cy = 1.0 - ((double) y) / (h - 1);
1135  cz = 1.0 - (cx + cy);
1136  } else {
1137  av_assert0(0);
1138  }
1139 
1140  xyz_to_rgb(m, cx, cy, cz, &jr, &jg, &jb);
1141 
1142  /* Check whether the requested color is within the
1143  gamut achievable with the given color system. If
1144  not, draw it in a reduced intensity, interpolated
1145  by desaturation to the closest within-gamut color. */
1146 
1147  if (constrain_rgb(&jr, &jg, &jb))
1148  mx *= contrast;
1149 
1150  jmax = FFMAX3(jr, jg, jb);
1151  if (jmax > 0) {
1152  jr = jr / jmax;
1153  jg = jg / jmax;
1154  jb = jb / jmax;
1155  }
1156  /* gamma correct from linear rgb to nonlinear rgb. */
1157  if (correct_gamma)
1158  gamma_correct_rgb(cs, &jr, &jg, &jb);
1159  r = mx * jr;
1160  g = mx * jg;
1161  b = mx * jb;
1162  pixels[y * linesize + x * 4 + 0] = r;
1163  pixels[y * linesize + x * 4 + 1] = g;
1164  pixels[y * linesize + x * 4 + 2] = b;
1165  pixels[y * linesize + x * 4 + 3] = 65535;
1166  }
1167  }
1168  }
1169 }
1170 
1171 static void
1172 plot_white_point(uint16_t* pixels,
1173  int const linesize,
1174  int const w,
1175  int const h,
1176  int const maxval,
1177  int const color_system,
1178  int const cie)
1179 {
1180  const struct ColorSystem *cs = &color_systems[color_system];
1181  int wx, wy;
1182 
1183  if (cie == LUV) {
1184  double wup, wvp;
1185  xy_to_upvp(cs->xWhite, cs->yWhite, &wup, &wvp);
1186  wx = wup;
1187  wy = wvp;
1188  wx = (w - 1) * wup;
1189  wy = (h - 1) - ((int) ((h - 1) * wvp));
1190  } else if (cie == UCS) {
1191  double wu, wv;
1192  xy_to_uv(cs->xWhite, cs->yWhite, &wu, &wv);
1193  wx = wu;
1194  wy = wv;
1195  wx = (w - 1) * wu;
1196  wy = (h - 1) - ((int) ((h - 1) * wv));
1197  } else if (cie == XYY) {
1198  wx = (w - 1) * cs->xWhite;
1199  wy = (h - 1) - ((int) ((h - 1) * cs->yWhite));
1200  } else {
1201  av_assert0(0);
1202  }
1203 
1204  draw_rline(pixels, linesize,
1205  wx + Sz(3), wy, wx + Sz(10), wy,
1206  w, h);
1207  draw_rline(pixels, linesize,
1208  wx - Sz(3), wy, wx - Sz(10), wy,
1209  w, h);
1210  draw_rline(pixels, linesize,
1211  wx, wy + Sz(3), wx, wy + Sz(10),
1212  w, h);
1213  draw_rline(pixels, linesize,
1214  wx, wy - Sz(3), wx, wy - Sz(10),
1215  w, h);
1216 }
1217 
1218 static int draw_background(AVFilterContext *ctx)
1219 {
1220  CiescopeContext *s = ctx->priv;
1221  const struct ColorSystem *cs = &color_systems[s->color_system];
1222  AVFilterLink *outlink = ctx->outputs[0];
1223  int w = s->size;
1224  int h = s->size;
1225  uint16_t *pixels;
1226 
1227  if ((s->f = ff_get_video_buffer(outlink, outlink->w, outlink->h)) == NULL)
1228  return AVERROR(ENOMEM);
1229  pixels = (uint16_t *)s->f->data[0];
1230 
1231  tongue_outline(pixels, s->f->linesize[0] / 2, w, h, 65535, s->cie);
1232 
1233  fill_in_tongue(pixels, s->f->linesize[0] / 2, w, h, 65535, cs, (const double (*)[3])s->i, s->cie,
1234  s->correct_gamma, s->contrast);
1235 
1236  return 0;
1237 }
1238 
1239 static void filter_rgb48(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y)
1240 {
1241  CiescopeContext *s = ctx->priv;
1242  const uint16_t* src = (const uint16_t*)(in->data[0] + in->linesize[0] * y + x * 6);
1243  double r = src[0] / 65535.;
1244  double g = src[1] / 65535.;
1245  double b = src[2] / 65535.;
1246  double cz;
1247 
1248  rgb_to_xy(r, g, b, cx, cy, &cz, (const double (*)[3])s->m);
1249 }
1250 
1251 static void filter_rgba64(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y)
1252 {
1253  CiescopeContext *s = ctx->priv;
1254  const uint16_t* src = (const uint16_t*)(in->data[0] + in->linesize[0] * y + x * 8);
1255  double r = src[0] / 65535.;
1256  double g = src[1] / 65535.;
1257  double b = src[2] / 65535.;
1258  double cz;
1259 
1260  rgb_to_xy(r, g, b, cx, cy, &cz, (const double (*)[3])s->m);
1261 }
1262 
1263 static void filter_rgb24(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y)
1264 {
1265  CiescopeContext *s = ctx->priv;
1266  const uint8_t* src = in->data[0] + in->linesize[0] * y + x * 3;
1267  double r = src[0] / 255.;
1268  double g = src[1] / 255.;
1269  double b = src[2] / 255.;
1270  double cz;
1271 
1272  rgb_to_xy(r, g, b, cx, cy, &cz, (const double (*)[3])s->m);
1273 }
1274 
1275 static void filter_rgba(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y)
1276 {
1277  CiescopeContext *s = ctx->priv;
1278  const uint8_t* src = in->data[0] + in->linesize[0] * y + x * 4;
1279  double r = src[0] / 255.;
1280  double g = src[1] / 255.;
1281  double b = src[2] / 255.;
1282  double cz;
1283 
1284  rgb_to_xy(r, g, b, cx, cy, &cz, (const double (*)[3])s->m);
1285 }
1286 
1287 static void filter_xyz(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y)
1288 {
1289  CiescopeContext *s = ctx->priv;
1290  const uint16_t* src = (uint16_t *)(in->data[0] + in->linesize[0] * y + x * 6);
1291  double lx = s->log2lin[src[0]];
1292  double ly = s->log2lin[src[1]];
1293  double lz = s->log2lin[src[2]];
1294  double sum = lx + ly + lz;
1295 
1296  if (sum == 0)
1297  sum = 1;
1298  *cx = lx / sum;
1299  *cy = ly / sum;
1300 }
1301 
1302 static void plot_gamuts(uint16_t *pixels, int linesize, int w, int h,
1303  int cie, int gamuts)
1304 {
1305  int i;
1306 
1307  for (i = 0; i < NB_CS; i++) {
1308  const struct ColorSystem *cs = &color_systems[i];
1309  int rx, ry, gx, gy, bx, by;
1310 
1311  if (!((1 << i) & gamuts))
1312  continue;
1313  if (cie == LUV) {
1314  double wup, wvp;
1315  xy_to_upvp(cs->xRed, cs->yRed, &wup, &wvp);
1316  rx = (w - 1) * wup;
1317  ry = (h - 1) - ((int) ((h - 1) * wvp));
1318  xy_to_upvp(cs->xGreen, cs->yGreen, &wup, &wvp);
1319  gx = (w - 1) * wup;
1320  gy = (h - 1) - ((int) ((h - 1) * wvp));
1321  xy_to_upvp(cs->xBlue, cs->yBlue, &wup, &wvp);
1322  bx = (w - 1) * wup;
1323  by = (h - 1) - ((int) ((h - 1) * wvp));
1324  } else if (cie == UCS) {
1325  double wu, wv;
1326  xy_to_uv(cs->xRed, cs->yRed, &wu, &wv);
1327  rx = (w - 1) * wu;
1328  ry = (h - 1) - ((int) ((h - 1) * wv));
1329  xy_to_uv(cs->xGreen, cs->yGreen, &wu, &wv);
1330  gx = (w - 1) * wu;
1331  gy = (h - 1) - ((int) ((h - 1) * wv));
1332  xy_to_uv(cs->xBlue, cs->yBlue, &wu, &wv);
1333  bx = (w - 1) * wu;
1334  by = (h - 1) - ((int) ((h - 1) * wv));
1335  } else if (cie == XYY) {
1336  rx = (w - 1) * cs->xRed;
1337  ry = (h - 1) - ((int) ((h - 1) * cs->yRed));
1338  gx = (w - 1) * cs->xGreen;
1339  gy = (h - 1) - ((int) ((h - 1) * cs->yGreen));
1340  bx = (w - 1) * cs->xBlue;
1341  by = (h - 1) - ((int) ((h - 1) * cs->yBlue));
1342  } else {
1343  av_assert0(0);
1344  }
1345 
1346  draw_rline(pixels, linesize, rx, ry, gx, gy, w, h);
1347  draw_rline(pixels, linesize, gx, gy, bx, by, w, h);
1348  draw_rline(pixels, linesize, bx, by, rx, ry, w, h);
1349  }
1350 }
1351 
1352 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
1353 {
1354  AVFilterContext *ctx = inlink->dst;
1355  CiescopeContext *s = ctx->priv;
1356  AVFilterLink *outlink = ctx->outputs[0];
1357  int i = s->intensity * 65535;
1358  int w = outlink->w;
1359  int h = outlink->h;
1360  AVFrame *out;
1361  int ret, x, y;
1362 
1363  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
1364  if (!out) {
1365  av_frame_free(&in);
1366  return AVERROR(ENOMEM);
1367  }
1368  out->pts = in->pts;
1369 
1370  if (!s->background) {
1371  ret = draw_background(ctx);
1372  if (ret < 0) {
1373  av_frame_free(&out);
1374  return ret;
1375  }
1376  s->background = 1;
1377  }
1378  for (y = 0; y < outlink->h; y++) {
1379  memset(out->data[0] + y * out->linesize[0], 0, outlink->w * 8);
1380  }
1381 
1382  for (y = 0; y < in->height; y++) {
1383  for (x = 0; x < in->width; x++) {
1384  double cx, cy;
1385  uint16_t *dst;
1386  int wx, wy;
1387 
1388  s->filter(ctx, in, &cx, &cy, x, y);
1389 
1390  if (s->cie == LUV) {
1391  double up, vp;
1392  xy_to_upvp(cx, cy, &up, &vp);
1393  cx = up;
1394  cy = vp;
1395  } else if (s->cie == UCS) {
1396  double u, v;
1397  xy_to_uv(cx, cy, &u, &v);
1398  cx = u;
1399  cy = v;
1400  }
1401 
1402  wx = (w - 1) * cx;
1403  wy = (h - 1) - ((h - 1) * cy);
1404 
1405  if (wx < 0 || wx >= w ||
1406  wy < 0 || wy >= h)
1407  continue;
1408 
1409  dst = (uint16_t *)(out->data[0] + wy * out->linesize[0] + wx * 8 + 0);
1410  dst[0] = FFMIN(dst[0] + i, 65535);
1411  dst[1] = FFMIN(dst[1] + i, 65535);
1412  dst[2] = FFMIN(dst[2] + i, 65535);
1413  dst[3] = 65535;
1414  }
1415  }
1416 
1417  for (y = 0; y < outlink->h; y++) {
1418  uint16_t *dst = (uint16_t *)(out->data[0] + y * out->linesize[0]);
1419  const uint16_t *src = (const uint16_t *)(s->f->data[0] + y * s->f->linesize[0]);
1420  for (x = 0; x < outlink->w; x++) {
1421  const int xx = x * 4;
1422  if (dst[xx + 3] == 0) {
1423  dst[xx + 0] = src[xx + 0];
1424  dst[xx + 1] = src[xx + 1];
1425  dst[xx + 2] = src[xx + 2];
1426  dst[xx + 3] = src[xx + 3];
1427  }
1428  }
1429  }
1430 
1431  if (s->show_white)
1432  plot_white_point((uint16_t *)out->data[0], out->linesize[0] / 2,
1433  outlink->w, outlink->h, 65535,
1434  s->color_system, s->cie);
1435 
1436  plot_gamuts((uint16_t *)out->data[0], out->linesize[0] / 2,
1437  outlink->w, outlink->h,
1438  s->cie, s->gamuts);
1439 
1440  av_frame_free(&in);
1441  return ff_filter_frame(outlink, out);
1442 }
1443 
1444 static void av_cold uninit(AVFilterContext *ctx)
1445 {
1446  CiescopeContext *s = ctx->priv;
1447 
1448  av_frame_free(&s->f);
1449 }
1450 
1451 static int config_input(AVFilterLink *inlink)
1452 {
1453  CiescopeContext *s = inlink->dst->priv;
1454  int i;
1455 
1456  get_rgb2xyz_matrix(color_systems[s->color_system], s->m);
1457  invert_matrix3x3(s->m, s->i);
1458 
1459  switch (inlink->format) {
1460  case AV_PIX_FMT_RGB24:
1461  s->filter = filter_rgb24;
1462  break;
1463  case AV_PIX_FMT_RGBA:
1464  s->filter = filter_rgba;
1465  break;
1466  case AV_PIX_FMT_RGB48:
1467  s->filter = filter_rgb48;
1468  break;
1469  case AV_PIX_FMT_RGBA64:
1470  s->filter = filter_rgba64;
1471  break;
1472  case AV_PIX_FMT_XYZ12:
1473  s->filter = filter_xyz;
1474  for (i = 0; i < 65536; i++)
1475  s->log2lin[i] = pow(i / 65535., s->igamma) * 65535.;
1476  break;
1477  default:
1478  av_assert0(0);
1479  }
1480 
1481  return 0;
1482 }
1483 
1484 static const AVFilterPad inputs[] = {
1485  {
1486  .name = "default",
1487  .type = AVMEDIA_TYPE_VIDEO,
1488  .filter_frame = filter_frame,
1489  .config_props = config_input,
1490  },
1491  { NULL }
1492 };
1493 
1494 static const AVFilterPad outputs[] = {
1495  {
1496  .name = "default",
1497  .type = AVMEDIA_TYPE_VIDEO,
1498  .config_props = config_output,
1499  },
1500  { NULL }
1501 };
1502 
1503 AVFilter ff_vf_ciescope = {
1504  .name = "ciescope",
1505  .description = NULL_IF_CONFIG_SMALL("Video CIE scope."),
1506  .priv_size = sizeof(CiescopeContext),
1507  .priv_class = &ciescope_class,
1508  .query_formats = query_formats,
1509  .uninit = uninit,
1510  .inputs = inputs,
1511  .outputs = outputs,
1512 };
SMPTEsystem
Definition: vf_ciescope.c:42
CiescopeContext::filter
void(* filter)(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y)
Definition: vf_ciescope.c:69
Rec709system
Definition: vf_ciescope.c:47
UCS
Definition: vf_ciescope.c:34
NULL
#define NULL
Definition: coverity.c:32
color_systems
static const struct ColorSystem color_systems[]
Definition: vf_ciescope.c:660
CieSystem
CieSystem
Definition: vf_ciescope.c:32
s
const char * s
Definition: avisynth_c.h:768
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:187
uv_to_xy
static void uv_to_xy(double const u, double const v, double *const xc, double *const yc)
Definition: vf_ciescope.c:708
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_ciescope.c:135
h
h
Definition: vp9dsp_template.c:2038
rgb_to_xy
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])
Definition: vf_ciescope.c:830
AVOption
AVOption.
Definition: opt.h:246
Sz
#define Sz(x)
Definition: vf_ciescope.c:930
avfilter.h
Main libavfilter public API header.
AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:64
constrain_rgb
static int constrain_rgb(double *const r, double *const g, double *const b)
Definition: vf_ciescope.c:851
g
const char * g
Definition: vf_curves.c:112
AV_OPT_TYPE_INT
Definition: opt.h:223
AV_PIX_FMT_RGBA64
#define AV_PIX_FMT_RGBA64
Definition: pixfmt.h:341
E
#define E
Definition: vf_ciescope.c:648
NB_CIE
Definition: vf_ciescope.c:36
b
const char * b
Definition: vf_curves.c:113
draw_background
static int draw_background(AVFilterContext *ctx)
Definition: vf_ciescope.c:1218
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_ciescope.c:1352
CIE1931system
Definition: vf_ciescope.c:46
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:92
fill_in_tongue
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)
Definition: vf_ciescope.c:1088
LUV
Definition: vf_ciescope.c:35
src
#define src
Definition: vp8dsp.c:254
AV_OPT_TYPE_FLAGS
Definition: opt.h:222
APPLEsystem
Definition: vf_ciescope.c:44
filter_rgb48
static void filter_rgb48(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y)
Definition: vf_ciescope.c:1239
gamma_correct
static void gamma_correct(const struct ColorSystem *const cs, double *const c)
Definition: vf_ciescope.c:880
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
ColorSystem::xBlue
double xBlue
Definition: vf_ciescope.c:163
ff_vf_ciescope
AVFilter ff_vf_ciescope
Definition: vf_ciescope.c:1503
tongue_outline
static void tongue_outline(uint16_t *const pixels, int const linesize, int const w, int const h, uint16_t const maxval, int const cie)
Definition: vf_ciescope.c:1057
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_ciescope.c:148
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
AVFilterContext::inputs
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:331
filter_rgb24
static void filter_rgb24(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y)
Definition: vf_ciescope.c:1263
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AV_OPT_TYPE_CONST
Definition: opt.h:232
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1125
ColorsSystems
ColorsSystems
Definition: vf_ciescope.c:39
ciescope_options
static const AVOption ciescope_options[]
Definition: vf_ciescope.c:75
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:82
D65
#define D65
Definition: vf_ciescope.c:650
opt.h
AVOptions.
xyz_to_rgb
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)
Definition: vf_ciescope.c:760
CiescopeContext::gamuts
unsigned gamuts
Definition: vf_ciescope.c:55
inputs
static const AVFilterPad inputs[]
Definition: vf_ciescope.c:1484
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:271
CiescopeContext::i
double i[3][3]
Definition: vf_ciescope.c:66
ColorSystem::xGreen
double xGreen
Definition: vf_ciescope.c:163
size
ptrdiff_t size
Definition: opengl_enc.c:101
D50
#define D50
Definition: vf_ciescope.c:649
spectral_chromaticity
static float const spectral_chromaticity[][3]
Definition: vf_ciescope.c:170
ColorSystem::xWhite
double xWhite
Definition: vf_ciescope.c:163
xy_to_uv
static void xy_to_uv(double xc, double yc, double *const u, double *const v)
Definition: vf_ciescope.c:747
draw_line
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)
Definition: vf_ciescope.c:993
C
#define C
Definition: vf_ciescope.c:647
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
gamma_correct_rgb
static void gamma_correct_rgb(const struct ColorSystem *const cs, double *const r, double *const g, double *const b)
Definition: vf_ciescope.c:916
AVFrame::width
int width
width and height of the video frame
Definition: frame.h:239
find_tongue
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)
Definition: vf_ciescope.c:964
ColorSystem::gamma
double gamma
Definition: vf_ciescope.c:163
S
#define S(s, c, i)
Definition: flacdsp_template.c:46
AVERROR
#define AVERROR(e)
Definition: error.h:43
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:163
AV_OPT_TYPE_FLOAT
Definition: opt.h:226
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
r
const char * r
Definition: vf_curves.c:111
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:338
filter_xyz
static void filter_xyz(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y)
Definition: vf_ciescope.c:1287
AV_PIX_FMT_RGB48
#define AV_PIX_FMT_RGB48
Definition: pixfmt.h:337
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
ColorSystem::yWhite
double yWhite
Definition: vf_ciescope.c:163
in_pix_fmts
static enum AVPixelFormat in_pix_fmts[]
Definition: vf_ciescope.c:121
FLAGS
#define FLAGS
Definition: vf_ciescope.c:73
NTSCsystem
Definition: vf_ciescope.c:40
AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:94
filter_rgba64
static void filter_rgba64(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y)
Definition: vf_ciescope.c:1251
NB_CS
Definition: vf_ciescope.c:49
plot_gamuts
static void plot_gamuts(uint16_t *pixels, int linesize, int w, int h, int cie, int gamuts)
Definition: vf_ciescope.c:1302
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
ff_formats_ref
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:440
void
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AV_OPT_TYPE_BOOL
Definition: opt.h:240
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
EBUsystem
Definition: vf_ciescope.c:41
monochrome_color_location
static void monochrome_color_location(double waveLength, int w, int h, int cie, int *xP, int *yP)
Definition: vf_ciescope.c:933
invert_matrix3x3
static void invert_matrix3x3(double in[3][3], double out[3][3])
Definition: vf_ciescope.c:769
AV_OPT_TYPE_DOUBLE
Definition: opt.h:225
SMPTE240Msystem
Definition: vf_ciescope.c:43
XYY
Definition: vf_ciescope.c:33
CiescopeContext::m
double m[3][3]
Definition: vf_ciescope.c:67
Rec2020system
Definition: vf_ciescope.c:48
CiescopeContext::f
AVFrame * f
Definition: vf_ciescope.c:68
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:218
xy_to_upvp
static void xy_to_upvp(double xc, double yc, double *const up, double *const vp)
Definition: vf_ciescope.c:734
ColorSystem::yBlue
double yBlue
Definition: vf_ciescope.c:163
in
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
Definition: audio_convert.c:194
ColorSystem::yGreen
double yGreen
Definition: vf_ciescope.c:163
AV_PIX_FMT_XYZ12
#define AV_PIX_FMT_XYZ12
Definition: pixfmt.h:391
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AVFilter
Filter definition.
Definition: avfilter.h:144
get_rgb2xyz_matrix
static void get_rgb2xyz_matrix(struct ColorSystem system, double m[3][3])
Definition: vf_ciescope.c:796
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
upvp_to_xy
static void upvp_to_xy(double const up, double const vp, double *const xc, double *const yc)
Definition: vf_ciescope.c:721
CiescopeContext::log2lin
double log2lin[65536]
Definition: vf_ciescope.c:64
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:148
u
#define u(width,...)
Definition: vaapi_encode_h26x.h:36
parseutils.h
misc parsing utilities
AVFilterContext::outputs
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:335
draw_rline
static void draw_rline(uint16_t *const pixels, int linesize, int x0, int y0, int x1, int y1, int w, int h)
Definition: vf_ciescope.c:1025
ColorSystem::yRed
double yRed
Definition: vf_ciescope.c:163
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:201
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_ciescope.c:1451
int
int
Definition: ffmpeg_filter.c:190
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
out_pix_fmts
static enum AVPixelFormat out_pix_fmts[]
Definition: vf_ciescope.c:130
plot_white_point
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)
Definition: vf_ciescope.c:1172
pixels
int pixels
Definition: avisynth_c.h:429
uninit
static void av_cold uninit(AVFilterContext *ctx)
Definition: vf_ciescope.c:1444
OFFSET
#define OFFSET(x)
Definition: vf_ciescope.c:72
ColorSystem::xRed
double xRed
Definition: vf_ciescope.c:163
AVFilterContext
An instance of a filter.
Definition: avfilter.h:323
AVFrame::height
int height
Definition: frame.h:239
out
FILE * out
Definition: movenc.c:54
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
outputs
static const AVFilterPad outputs[]
Definition: vf_ciescope.c:1494
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(ciescope)
internal.h
internal API functions
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
wRGBsystem
Definition: vf_ciescope.c:45
FFMAX3
#define FFMAX3(a, b, c)
Definition: common.h:95
filter_rgba
static void filter_rgba(AVFilterContext *ctx, AVFrame *in, double *cx, double *cy, int x, int y)
Definition: vf_ciescope.c:1275
GAMMA_REC709
#define GAMMA_REC709
Definition: vf_ciescope.c:658
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