FFmpeg
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  DCIP3,
50  NB_CS
51 };
52 
53 typedef struct CiescopeContext {
54  const AVClass *class;
55  int color_system;
56  unsigned gamuts;
57  int size;
58  int show_white;
59  int correct_gamma;
60  int cie;
61  float intensity;
62  float contrast;
63  int background;
64  int fill;
65 
66  float log2lin[65536];
67  float igamma;
68  float i[3][3];
69  float m[3][3];
70  AVFrame *f;
71  void (*filter)(AVFilterContext *ctx, const uint8_t *ptr,
72  ptrdiff_t linesize,
73  float *cx, float *cy, int x, int y);
74 } CiescopeContext;
75 
76 #define OFFSET(x) offsetof(CiescopeContext, x)
77 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
78 
79 static const AVOption ciescope_options[] = {
80  { "system", "set color system", OFFSET(color_system), AV_OPT_TYPE_INT, {.i64=Rec709system}, 0, NB_CS-1, FLAGS, "system" },
81  { "ntsc", "NTSC 1953 Y'I'O' (ITU-R BT.470 System M)", 0, AV_OPT_TYPE_CONST, {.i64=NTSCsystem}, 0, 0, FLAGS, "system" },
82  { "470m", "NTSC 1953 Y'I'O' (ITU-R BT.470 System M)", 0, AV_OPT_TYPE_CONST, {.i64=NTSCsystem}, 0, 0, FLAGS, "system" },
83  { "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" },
84  { "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" },
85  { "smpte", "SMPTE-C RGB", 0, AV_OPT_TYPE_CONST, {.i64=SMPTEsystem}, 0, 0, FLAGS, "system" },
86  { "240m", "SMPTE-240M Y'PbPr", 0, AV_OPT_TYPE_CONST, {.i64=SMPTE240Msystem},0, 0, FLAGS, "system" },
87  { "apple", "Apple RGB", 0, AV_OPT_TYPE_CONST, {.i64=APPLEsystem}, 0, 0, FLAGS, "system" },
88  { "widergb", "Adobe Wide Gamut RGB", 0, AV_OPT_TYPE_CONST, {.i64=wRGBsystem}, 0, 0, FLAGS, "system" },
89  { "cie1931", "CIE 1931 RGB", 0, AV_OPT_TYPE_CONST, {.i64=CIE1931system}, 0, 0, FLAGS, "system" },
90  { "hdtv", "ITU.BT-709 Y'CbCr", 0, AV_OPT_TYPE_CONST, {.i64=Rec709system}, 0, 0, FLAGS, "system" },
91  { "rec709", "ITU.BT-709 Y'CbCr", 0, AV_OPT_TYPE_CONST, {.i64=Rec709system}, 0, 0, FLAGS, "system" },
92  { "uhdtv", "ITU-R.BT-2020", 0, AV_OPT_TYPE_CONST, {.i64=Rec2020system}, 0, 0, FLAGS, "system" },
93  { "rec2020", "ITU-R.BT-2020", 0, AV_OPT_TYPE_CONST, {.i64=Rec2020system}, 0, 0, FLAGS, "system" },
94  { "dcip3", "DCI-P3", 0, AV_OPT_TYPE_CONST, {.i64=DCIP3}, 0, 0, FLAGS, "system" },
95  { "cie", "set cie system", OFFSET(cie), AV_OPT_TYPE_INT, {.i64=XYY}, 0, NB_CIE-1, FLAGS, "cie" },
96  { "xyy", "CIE 1931 xyY", 0, AV_OPT_TYPE_CONST, {.i64=XYY}, 0, 0, FLAGS, "cie" },
97  { "ucs", "CIE 1960 UCS", 0, AV_OPT_TYPE_CONST, {.i64=UCS}, 0, 0, FLAGS, "cie" },
98  { "luv", "CIE 1976 Luv", 0, AV_OPT_TYPE_CONST, {.i64=LUV}, 0, 0, FLAGS, "cie" },
99  { "gamuts", "set what gamuts to draw", OFFSET(gamuts), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 0xFFF, FLAGS, "gamuts" },
100  { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<NTSCsystem}, 0, 0, FLAGS, "gamuts" },
101  { "470m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<NTSCsystem}, 0, 0, FLAGS, "gamuts" },
102  { "ebu", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<EBUsystem}, 0, 0, FLAGS, "gamuts" },
103  { "470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<EBUsystem}, 0, 0, FLAGS, "gamuts" },
104  { "smpte", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<SMPTEsystem}, 0, 0, FLAGS, "gamuts" },
105  { "240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<SMPTE240Msystem}, 0, 0, FLAGS, "gamuts" },
106  { "apple", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<APPLEsystem}, 0, 0, FLAGS, "gamuts" },
107  { "widergb", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<wRGBsystem}, 0, 0, FLAGS, "gamuts" },
108  { "cie1931", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<CIE1931system}, 0, 0, FLAGS, "gamuts" },
109  { "hdtv", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<Rec709system}, 0, 0, FLAGS, "gamuts" },
110  { "rec709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<Rec709system}, 0, 0, FLAGS, "gamuts" },
111  { "uhdtv", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<Rec2020system}, 0, 0, FLAGS, "gamuts" },
112  { "rec2020", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<Rec2020system}, 0, 0, FLAGS, "gamuts" },
113  { "dcip3", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1<<DCIP3}, 0, 0, FLAGS, "gamuts" },
114  { "size", "set ciescope size", OFFSET(size), AV_OPT_TYPE_INT, {.i64=512}, 256, 8192, FLAGS },
115  { "s", "set ciescope size", OFFSET(size), AV_OPT_TYPE_INT, {.i64=512}, 256, 8192, FLAGS },
116  { "intensity", "set ciescope intensity", OFFSET(intensity), AV_OPT_TYPE_FLOAT, {.dbl=0.001}, 0, 1, FLAGS },
117  { "i", "set ciescope intensity", OFFSET(intensity), AV_OPT_TYPE_FLOAT, {.dbl=0.001}, 0, 1, FLAGS },
118  { "contrast", NULL, OFFSET(contrast), AV_OPT_TYPE_FLOAT, {.dbl=0.75}, 0, 1, FLAGS },
119  { "corrgamma", NULL, OFFSET(correct_gamma), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
120  { "showwhite", NULL, OFFSET(show_white), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
121  { "gamma", NULL, OFFSET(igamma), AV_OPT_TYPE_DOUBLE, {.dbl=2.6}, 0.1, 6, FLAGS },
122  { "fill", "fill with CIE colors", OFFSET(fill), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
123  { NULL }
124 };
125 
126 AVFILTER_DEFINE_CLASS(ciescope);
127 
128 static const enum AVPixelFormat in_pix_fmts[] = {
129  AV_PIX_FMT_RGB24,
130  AV_PIX_FMT_RGBA,
131  AV_PIX_FMT_RGB48,
132  AV_PIX_FMT_RGBA64,
133  AV_PIX_FMT_XYZ12,
134  AV_PIX_FMT_NONE
135 };
136 
137 static const enum AVPixelFormat out_pix_fmts[] = {
138  AV_PIX_FMT_RGBA64,
139  AV_PIX_FMT_NONE
140 };
141 
142 static int query_formats(AVFilterContext *ctx)
143 {
144  int ret;
145 
146  if ((ret = ff_formats_ref(ff_make_format_list(in_pix_fmts), &ctx->inputs[0]->outcfg.formats)) < 0)
147  return ret;
148 
149  if ((ret = ff_formats_ref(ff_make_format_list(out_pix_fmts), &ctx->outputs[0]->incfg.formats)) < 0)
150  return ret;
151 
152  return 0;
153 }
154 
155 static int config_output(AVFilterLink *outlink)
156 {
157  CiescopeContext *s = outlink->src->priv;
158 
159  outlink->h = outlink->w = s->size;
160  outlink->sample_aspect_ratio = (AVRational){1,1};
161 
162  return 0;
163 }
164 
165 /* A color system is defined by the CIE x and y coordinates of its
166  three primary illuminants and the x and y coordinates of the white
167  point. */
168 
169 struct ColorSystem {
170  float xRed, yRed, /* Red primary illuminant */
171  xGreen, yGreen, /* Green primary illuminant */
172  xBlue, yBlue, /* Blue primary illuminant */
173  xWhite, yWhite, /* White point */
174  gamma; /* gamma of nonlinear correction */
175 };
176 
177 static float const spectral_chromaticity[][3] = {
178  { 0.175560, 0.005294, 0.819146 },
179  { 0.175483, 0.005286, 0.819231 },
180  { 0.175400, 0.005279, 0.819321 },
181  { 0.175317, 0.005271, 0.819412 },
182  { 0.175237, 0.005263, 0.819500 },
183  { 0.175161, 0.005256, 0.819582 },
184  { 0.175088, 0.005247, 0.819665 },
185  { 0.175015, 0.005236, 0.819749 },
186  { 0.174945, 0.005226, 0.819829 },
187  { 0.174880, 0.005221, 0.819899 },
188  { 0.174821, 0.005221, 0.819959 },
189  { 0.174770, 0.005229, 0.820001 },
190  { 0.174722, 0.005238, 0.820040 },
191  { 0.174665, 0.005236, 0.820098 },
192  { 0.174595, 0.005218, 0.820187 },
193  { 0.174510, 0.005182, 0.820309 },
194  { 0.174409, 0.005127, 0.820464 },
195  { 0.174308, 0.005068, 0.820624 },
196  { 0.174222, 0.005017, 0.820761 },
197  { 0.174156, 0.004981, 0.820863 },
198  { 0.174112, 0.004964, 0.820924 },
199  { 0.174088, 0.004964, 0.820948 },
200  { 0.174073, 0.004973, 0.820955 },
201  { 0.174057, 0.004982, 0.820961 },
202  { 0.174036, 0.004986, 0.820978 },
203  { 0.174008, 0.004981, 0.821012 },
204  { 0.173972, 0.004964, 0.821064 },
205  { 0.173932, 0.004943, 0.821125 },
206  { 0.173889, 0.004926, 0.821185 },
207  { 0.173845, 0.004916, 0.821239 },
208  { 0.173801, 0.004915, 0.821284 },
209  { 0.173754, 0.004925, 0.821321 },
210  { 0.173705, 0.004937, 0.821358 },
211  { 0.173655, 0.004944, 0.821401 },
212  { 0.173606, 0.004940, 0.821454 },
213  { 0.173560, 0.004923, 0.821517 },
214  { 0.173514, 0.004895, 0.821590 },
215  { 0.173468, 0.004865, 0.821667 },
216  { 0.173424, 0.004836, 0.821740 },
217  { 0.173380, 0.004813, 0.821807 },
218  { 0.173337, 0.004797, 0.821866 },
219  { 0.173291, 0.004786, 0.821923 },
220  { 0.173238, 0.004779, 0.821983 },
221  { 0.173174, 0.004775, 0.822051 },
222  { 0.173101, 0.004774, 0.822125 },
223  { 0.173021, 0.004775, 0.822204 },
224  { 0.172934, 0.004781, 0.822285 },
225  { 0.172843, 0.004791, 0.822366 },
226  { 0.172751, 0.004799, 0.822450 },
227  { 0.172662, 0.004802, 0.822536 },
228  { 0.172577, 0.004799, 0.822624 },
229  { 0.172489, 0.004795, 0.822715 },
230  { 0.172396, 0.004796, 0.822808 },
231  { 0.172296, 0.004803, 0.822901 },
232  { 0.172192, 0.004815, 0.822993 },
233  { 0.172087, 0.004833, 0.823081 },
234  { 0.171982, 0.004855, 0.823163 },
235  { 0.171871, 0.004889, 0.823240 },
236  { 0.171741, 0.004939, 0.823319 },
237  { 0.171587, 0.005010, 0.823402 },
238  { 0.171407, 0.005102, 0.823490 },
239  { 0.171206, 0.005211, 0.823583 },
240  { 0.170993, 0.005334, 0.823674 },
241  { 0.170771, 0.005470, 0.823759 },
242  { 0.170541, 0.005621, 0.823838 },
243  { 0.170301, 0.005789, 0.823911 },
244  { 0.170050, 0.005974, 0.823976 },
245  { 0.169786, 0.006177, 0.824037 },
246  { 0.169505, 0.006398, 0.824097 },
247  { 0.169203, 0.006639, 0.824158 },
248  { 0.168878, 0.006900, 0.824222 },
249  { 0.168525, 0.007184, 0.824291 },
250  { 0.168146, 0.007491, 0.824363 },
251  { 0.167746, 0.007821, 0.824433 },
252  { 0.167328, 0.008175, 0.824496 },
253  { 0.166895, 0.008556, 0.824549 },
254  { 0.166446, 0.008964, 0.824589 },
255  { 0.165977, 0.009402, 0.824622 },
256  { 0.165483, 0.009865, 0.824652 },
257  { 0.164963, 0.010351, 0.824687 },
258  { 0.164412, 0.010858, 0.824731 },
259  { 0.163828, 0.011385, 0.824787 },
260  { 0.163210, 0.011937, 0.824853 },
261  { 0.162552, 0.012520, 0.824928 },
262  { 0.161851, 0.013137, 0.825011 },
263  { 0.161105, 0.013793, 0.825102 },
264  { 0.160310, 0.014491, 0.825199 },
265  { 0.159466, 0.015232, 0.825302 },
266  { 0.158573, 0.016015, 0.825412 },
267  { 0.157631, 0.016840, 0.825529 },
268  { 0.156641, 0.017705, 0.825654 },
269  { 0.155605, 0.018609, 0.825786 },
270  { 0.154525, 0.019556, 0.825920 },
271  { 0.153397, 0.020554, 0.826049 },
272  { 0.152219, 0.021612, 0.826169 },
273  { 0.150985, 0.022740, 0.826274 },
274  { 0.149691, 0.023950, 0.826359 },
275  { 0.148337, 0.025247, 0.826416 },
276  { 0.146928, 0.026635, 0.826437 },
277  { 0.145468, 0.028118, 0.826413 },
278  { 0.143960, 0.029703, 0.826337 },
279  { 0.142405, 0.031394, 0.826201 },
280  { 0.140796, 0.033213, 0.825991 },
281  { 0.139121, 0.035201, 0.825679 },
282  { 0.137364, 0.037403, 0.825233 },
283  { 0.135503, 0.039879, 0.824618 },
284  { 0.133509, 0.042692, 0.823798 },
285  { 0.131371, 0.045876, 0.822753 },
286  { 0.129086, 0.049450, 0.821464 },
287  { 0.126662, 0.053426, 0.819912 },
288  { 0.124118, 0.057803, 0.818079 },
289  { 0.121469, 0.062588, 0.815944 },
290  { 0.118701, 0.067830, 0.813468 },
291  { 0.115807, 0.073581, 0.810612 },
292  { 0.112776, 0.079896, 0.807328 },
293  { 0.109594, 0.086843, 0.803563 },
294  { 0.106261, 0.094486, 0.799253 },
295  { 0.102776, 0.102864, 0.794360 },
296  { 0.099128, 0.112007, 0.788865 },
297  { 0.095304, 0.121945, 0.782751 },
298  { 0.091294, 0.132702, 0.776004 },
299  { 0.087082, 0.144317, 0.768601 },
300  { 0.082680, 0.156866, 0.760455 },
301  { 0.078116, 0.170420, 0.751464 },
302  { 0.073437, 0.185032, 0.741531 },
303  { 0.068706, 0.200723, 0.730571 },
304  { 0.063993, 0.217468, 0.718539 },
305  { 0.059316, 0.235254, 0.705430 },
306  { 0.054667, 0.254096, 0.691238 },
307  { 0.050031, 0.274002, 0.675967 },
308  { 0.045391, 0.294976, 0.659633 },
309  { 0.040757, 0.316981, 0.642262 },
310  { 0.036195, 0.339900, 0.623905 },
311  { 0.031756, 0.363598, 0.604646 },
312  { 0.027494, 0.387921, 0.584584 },
313  { 0.023460, 0.412703, 0.563837 },
314  { 0.019705, 0.437756, 0.542539 },
315  { 0.016268, 0.462955, 0.520777 },
316  { 0.013183, 0.488207, 0.498610 },
317  { 0.010476, 0.513404, 0.476120 },
318  { 0.008168, 0.538423, 0.453409 },
319  { 0.006285, 0.563068, 0.430647 },
320  { 0.004875, 0.587116, 0.408008 },
321  { 0.003982, 0.610447, 0.385570 },
322  { 0.003636, 0.633011, 0.363352 },
323  { 0.003859, 0.654823, 0.341318 },
324  { 0.004646, 0.675898, 0.319456 },
325  { 0.006011, 0.696120, 0.297869 },
326  { 0.007988, 0.715342, 0.276670 },
327  { 0.010603, 0.733413, 0.255984 },
328  { 0.013870, 0.750186, 0.235943 },
329  { 0.017766, 0.765612, 0.216622 },
330  { 0.022244, 0.779630, 0.198126 },
331  { 0.027273, 0.792104, 0.180623 },
332  { 0.032820, 0.802926, 0.164254 },
333  { 0.038852, 0.812016, 0.149132 },
334  { 0.045328, 0.819391, 0.135281 },
335  { 0.052177, 0.825164, 0.122660 },
336  { 0.059326, 0.829426, 0.111249 },
337  { 0.066716, 0.832274, 0.101010 },
338  { 0.074302, 0.833803, 0.091894 },
339  { 0.082053, 0.834090, 0.083856 },
340  { 0.089942, 0.833289, 0.076769 },
341  { 0.097940, 0.831593, 0.070468 },
342  { 0.106021, 0.829178, 0.064801 },
343  { 0.114161, 0.826207, 0.059632 },
344  { 0.122347, 0.822770, 0.054882 },
345  { 0.130546, 0.818928, 0.050526 },
346  { 0.138702, 0.814774, 0.046523 },
347  { 0.146773, 0.810395, 0.042832 },
348  { 0.154722, 0.805864, 0.039414 },
349  { 0.162535, 0.801238, 0.036226 },
350  { 0.170237, 0.796519, 0.033244 },
351  { 0.177850, 0.791687, 0.030464 },
352  { 0.185391, 0.786728, 0.027881 },
353  { 0.192876, 0.781629, 0.025495 },
354  { 0.200309, 0.776399, 0.023292 },
355  { 0.207690, 0.771055, 0.021255 },
356  { 0.215030, 0.765595, 0.019375 },
357  { 0.222337, 0.760020, 0.017643 },
358  { 0.229620, 0.754329, 0.016051 },
359  { 0.236885, 0.748524, 0.014591 },
360  { 0.244133, 0.742614, 0.013253 },
361  { 0.251363, 0.736606, 0.012031 },
362  { 0.258578, 0.730507, 0.010916 },
363  { 0.265775, 0.724324, 0.009901 },
364  { 0.272958, 0.718062, 0.008980 },
365  { 0.280129, 0.711725, 0.008146 },
366  { 0.287292, 0.705316, 0.007391 },
367  { 0.294450, 0.698842, 0.006708 },
368  { 0.301604, 0.692308, 0.006088 },
369  { 0.308760, 0.685712, 0.005528 },
370  { 0.315914, 0.679063, 0.005022 },
371  { 0.323066, 0.672367, 0.004566 },
372  { 0.330216, 0.665628, 0.004156 },
373  { 0.337363, 0.658848, 0.003788 },
374  { 0.344513, 0.652028, 0.003459 },
375  { 0.351664, 0.645172, 0.003163 },
376  { 0.358814, 0.638287, 0.002899 },
377  { 0.365959, 0.631379, 0.002662 },
378  { 0.373102, 0.624451, 0.002448 },
379  { 0.380244, 0.617502, 0.002254 },
380  { 0.387379, 0.610542, 0.002079 },
381  { 0.394507, 0.603571, 0.001922 },
382  { 0.401626, 0.596592, 0.001782 },
383  { 0.408736, 0.589607, 0.001657 },
384  { 0.415836, 0.582618, 0.001546 },
385  { 0.422921, 0.575631, 0.001448 },
386  { 0.429989, 0.568649, 0.001362 },
387  { 0.437036, 0.561676, 0.001288 },
388  { 0.444062, 0.554714, 0.001224 },
389  { 0.451065, 0.547766, 0.001169 },
390  { 0.458041, 0.540837, 0.001123 },
391  { 0.464986, 0.533930, 0.001084 },
392  { 0.471899, 0.527051, 0.001051 },
393  { 0.478775, 0.520202, 0.001023 },
394  { 0.485612, 0.513389, 0.001000 },
395  { 0.492405, 0.506615, 0.000980 },
396  { 0.499151, 0.499887, 0.000962 },
397  { 0.505845, 0.493211, 0.000944 },
398  { 0.512486, 0.486591, 0.000923 },
399  { 0.519073, 0.480029, 0.000899 },
400  { 0.525600, 0.473527, 0.000872 },
401  { 0.532066, 0.467091, 0.000843 },
402  { 0.538463, 0.460725, 0.000812 },
403  { 0.544787, 0.454434, 0.000779 },
404  { 0.551031, 0.448225, 0.000744 },
405  { 0.557193, 0.442099, 0.000708 },
406  { 0.563269, 0.436058, 0.000673 },
407  { 0.569257, 0.430102, 0.000641 },
408  { 0.575151, 0.424232, 0.000616 },
409  { 0.580953, 0.418447, 0.000601 },
410  { 0.586650, 0.412758, 0.000591 },
411  { 0.592225, 0.407190, 0.000586 },
412  { 0.597658, 0.401762, 0.000580 },
413  { 0.602933, 0.396497, 0.000571 },
414  { 0.608035, 0.391409, 0.000556 },
415  { 0.612977, 0.386486, 0.000537 },
416  { 0.617779, 0.381706, 0.000516 },
417  { 0.622459, 0.377047, 0.000493 },
418  { 0.627037, 0.372491, 0.000472 },
419  { 0.631521, 0.368026, 0.000453 },
420  { 0.635900, 0.363665, 0.000435 },
421  { 0.640156, 0.359428, 0.000416 },
422  { 0.644273, 0.355331, 0.000396 },
423  { 0.648233, 0.351395, 0.000372 },
424  { 0.652028, 0.347628, 0.000344 },
425  { 0.655669, 0.344018, 0.000313 },
426  { 0.659166, 0.340553, 0.000281 },
427  { 0.662528, 0.337221, 0.000251 },
428  { 0.665764, 0.334011, 0.000226 },
429  { 0.668874, 0.330919, 0.000207 },
430  { 0.671859, 0.327947, 0.000194 },
431  { 0.674720, 0.325095, 0.000185 },
432  { 0.677459, 0.322362, 0.000179 },
433  { 0.680079, 0.319747, 0.000174 },
434  { 0.682582, 0.317249, 0.000170 },
435  { 0.684971, 0.314863, 0.000167 },
436  { 0.687250, 0.312586, 0.000164 },
437  { 0.689426, 0.310414, 0.000160 },
438  { 0.691504, 0.308342, 0.000154 },
439  { 0.693490, 0.306366, 0.000145 },
440  { 0.695389, 0.304479, 0.000133 },
441  { 0.697206, 0.302675, 0.000119 },
442  { 0.698944, 0.300950, 0.000106 },
443  { 0.700606, 0.299301, 0.000093 },
444  { 0.702193, 0.297725, 0.000083 },
445  { 0.703709, 0.296217, 0.000074 },
446  { 0.705163, 0.294770, 0.000067 },
447  { 0.706563, 0.293376, 0.000061 },
448  { 0.707918, 0.292027, 0.000055 },
449  { 0.709231, 0.290719, 0.000050 },
450  { 0.710500, 0.289453, 0.000047 },
451  { 0.711724, 0.288232, 0.000044 },
452  { 0.712901, 0.287057, 0.000041 },
453  { 0.714032, 0.285929, 0.000040 },
454  { 0.715117, 0.284845, 0.000038 },
455  { 0.716159, 0.283804, 0.000036 },
456  { 0.717159, 0.282806, 0.000035 },
457  { 0.718116, 0.281850, 0.000034 },
458  { 0.719033, 0.280935, 0.000032 },
459  { 0.719912, 0.280058, 0.000030 },
460  { 0.720753, 0.279219, 0.000028 },
461  { 0.721555, 0.278420, 0.000026 },
462  { 0.722315, 0.277662, 0.000023 },
463  { 0.723032, 0.276948, 0.000020 },
464  { 0.723702, 0.276282, 0.000016 },
465  { 0.724328, 0.275660, 0.000012 },
466  { 0.724914, 0.275078, 0.000007 },
467  { 0.725467, 0.274530, 0.000003 },
468  { 0.725992, 0.274008, 0.000000 },
469  { 0.726495, 0.273505, 0.000000 },
470  { 0.726975, 0.273025, 0.000000 },
471  { 0.727432, 0.272568, 0.000000 },
472  { 0.727864, 0.272136, 0.000000 },
473  { 0.728272, 0.271728, 0.000000 },
474  { 0.728656, 0.271344, 0.000000 },
475  { 0.729020, 0.270980, 0.000000 },
476  { 0.729361, 0.270639, 0.000000 },
477  { 0.729678, 0.270322, 0.000000 },
478  { 0.729969, 0.270031, 0.000000 },
479  { 0.730234, 0.269766, 0.000000 },
480  { 0.730474, 0.269526, 0.000000 },
481  { 0.730693, 0.269307, 0.000000 },
482  { 0.730896, 0.269104, 0.000000 },
483  { 0.731089, 0.268911, 0.000000 },
484  { 0.731280, 0.268720, 0.000000 },
485  { 0.731467, 0.268533, 0.000000 },
486  { 0.731650, 0.268350, 0.000000 },
487  { 0.731826, 0.268174, 0.000000 },
488  { 0.731993, 0.268007, 0.000000 },
489  { 0.732150, 0.267850, 0.000000 },
490  { 0.732300, 0.267700, 0.000000 },
491  { 0.732443, 0.267557, 0.000000 },
492  { 0.732581, 0.267419, 0.000000 },
493  { 0.732719, 0.267281, 0.000000 },
494  { 0.732859, 0.267141, 0.000000 },
495  { 0.733000, 0.267000, 0.000000 },
496  { 0.733142, 0.266858, 0.000000 },
497  { 0.733281, 0.266719, 0.000000 },
498  { 0.733417, 0.266583, 0.000000 },
499  { 0.733551, 0.266449, 0.000000 },
500  { 0.733683, 0.266317, 0.000000 },
501  { 0.733813, 0.266187, 0.000000 },
502  { 0.733936, 0.266064, 0.000000 },
503  { 0.734047, 0.265953, 0.000000 },
504  { 0.734143, 0.265857, 0.000000 },
505  { 0.734221, 0.265779, 0.000000 },
506  { 0.734286, 0.265714, 0.000000 },
507  { 0.734341, 0.265659, 0.000000 },
508  { 0.734390, 0.265610, 0.000000 },
509  { 0.734438, 0.265562, 0.000000 },
510  { 0.734482, 0.265518, 0.000000 },
511  { 0.734523, 0.265477, 0.000000 },
512  { 0.734560, 0.265440, 0.000000 },
513  { 0.734592, 0.265408, 0.000000 },
514  { 0.734621, 0.265379, 0.000000 },
515  { 0.734649, 0.265351, 0.000000 },
516  { 0.734673, 0.265327, 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  { 0.734690, 0.265310, 0.000000 },
643  { 0.734690, 0.265310, 0.000000 },
644  { 0.734690, 0.265310, 0.000000 },
645  { 0.734690, 0.265310, 0.000000 },
646  { 0.734690, 0.265310, 0.000000 },
647  { 0.734690, 0.265310, 0.000000 },
648  { 0.734690, 0.265310, 0.000000 },
649 };
650 
651 
652 /* Standard white point chromaticities. */
653 
654 #define C 0.310063, 0.316158
655 #define E 1.0/3.0, 1.0/3.0
656 #define D50 0.34570, 0.3585
657 #define D65 0.312713, 0.329016
658 
659 /* Gamma of nonlinear correction.
660  See Charles Poynton's ColorFAQ Item 45 and GammaFAQ Item 6 at
661  http://www.inforamp.net/~poynton/ColorFAQ.html
662  http://www.inforamp.net/~poynton/GammaFAQ.html
663 */
664 
665 #define GAMMA_REC709 0. /* Rec. 709 */
666 
667 static const struct ColorSystem color_systems[] = {
668  [NTSCsystem] = {
669  0.67, 0.33, 0.21, 0.71, 0.14, 0.08,
670  C, GAMMA_REC709
671  },
672  [EBUsystem] = {
673  0.64, 0.33, 0.29, 0.60, 0.15, 0.06,
674  D65, GAMMA_REC709
675  },
676  [SMPTEsystem] = {
677  0.630, 0.340, 0.310, 0.595, 0.155, 0.070,
678  D65, GAMMA_REC709
679  },
680  [SMPTE240Msystem] = {
681  0.670, 0.330, 0.210, 0.710, 0.150, 0.060,
682  D65, GAMMA_REC709
683  },
684  [APPLEsystem] = {
685  0.625, 0.340, 0.280, 0.595, 0.115, 0.070,
686  D65, GAMMA_REC709
687  },
688  [wRGBsystem] = {
689  0.7347, 0.2653, 0.1152, 0.8264, 0.1566, 0.0177,
690  D50, GAMMA_REC709
691  },
692  [CIE1931system] = {
693  0.7347, 0.2653, 0.2738, 0.7174, 0.1666, 0.0089,
694  E, GAMMA_REC709
695  },
696  [Rec709system] = {
697  0.64, 0.33, 0.30, 0.60, 0.15, 0.06,
698  D65, GAMMA_REC709
699  },
700  [Rec2020system] = {
701  0.708, 0.292, 0.170, 0.797, 0.131, 0.046,
702  D65, GAMMA_REC709
703  },
704  [DCIP3] = {
705  0.680, 0.320, 0.265, 0.690, 0.150, 0.060,
706  0.314, 0.351, GAMMA_REC709
707  },
708 };
709 
710 /*
711 static struct ColorSystem CustomSystem = {
712  "Custom",
713  0.64, 0.33, 0.30, 0.60, 0.15, 0.06,
714  D65, GAMMA_REC709
715 };
716 */
717 
718 static void
719 uv_to_xy(float const u,
720  float const v,
721  float *const xc,
722  float *const yc)
723 {
724 /*
725  Given 1970 coordinates u, v, determine 1931 chromaticities x, y
726 */
727  *xc = 3.f*u / (2.f*u - 8.f*v + 4.f);
728  *yc = 2.f*v / (2.f*u - 8.f*v + 4.f);
729 }
730 
731 static void
732 upvp_to_xy(float const up,
733  float const vp,
734  float * const xc,
735  float * const yc)
736 {
737 /*
738  Given 1976 coordinates u', v', determine 1931 chromaticities x, y
739 */
740  *xc = 9*up / (6*up - 16*vp + 12);
741  *yc = 4*vp / (6*up - 16*vp + 12);
742 }
743 
744 static void
745 xy_to_upvp(float xc,
746  float yc,
747  float * const up,
748  float * const vp)
749 {
750 /*
751  Given 1931 chromaticities x, y, determine 1976 coordinates u', v'
752 */
753  const float scale = 1.f / (-2.f*xc + 12.f*yc + 3.f);
754  *up = 4.f*xc * scale;
755  *vp = 9.f*yc * scale;
756 }
757 
758 static void
759 xy_to_uv(float xc,
760  float yc,
761  float * const u,
762  float * const v)
763 {
764 /*
765  Given 1931 chromaticities x, y, determine 1960 coordinates u, v
766 */
767  const float scale = 1.f / (-2.f*xc + 12.f*yc + 3.f);
768  *u = 4.f*xc * scale;
769  *v = 6.f*yc * scale;
770 }
771 
772 static void
773 xyz_to_rgb(const float m[3][3],
774  float xc, float yc, float zc,
775  float * const r, float * const g, float * const b)
776 {
777  *r = m[0][0]*xc + m[0][1]*yc + m[0][2]*zc;
778  *g = m[1][0]*xc + m[1][1]*yc + m[1][2]*zc;
779  *b = m[2][0]*xc + m[2][1]*yc + m[2][2]*zc;
780 }
781 
782 static void invert_matrix3x3(float in[3][3], float out[3][3])
783 {
784  float m00 = in[0][0], m01 = in[0][1], m02 = in[0][2],
785  m10 = in[1][0], m11 = in[1][1], m12 = in[1][2],
786  m20 = in[2][0], m21 = in[2][1], m22 = in[2][2];
787  int i, j;
788  float det;
789 
790  out[0][0] = (m11 * m22 - m21 * m12);
791  out[0][1] = -(m01 * m22 - m21 * m02);
792  out[0][2] = (m01 * m12 - m11 * m02);
793  out[1][0] = -(m10 * m22 - m20 * m12);
794  out[1][1] = (m00 * m22 - m20 * m02);
795  out[1][2] = -(m00 * m12 - m10 * m02);
796  out[2][0] = (m10 * m21 - m20 * m11);
797  out[2][1] = -(m00 * m21 - m20 * m01);
798  out[2][2] = (m00 * m11 - m10 * m01);
799 
800  det = m00 * out[0][0] + m10 * out[0][1] + m20 * out[0][2];
801  det = 1.0 / det;
802 
803  for (i = 0; i < 3; i++) {
804  for (j = 0; j < 3; j++)
805  out[i][j] *= det;
806  }
807 }
808 
809 static void get_rgb2xyz_matrix(struct ColorSystem system, float m[3][3])
810 {
811  float S[3], X[4], Z[4];
812  int i;
813 
814  X[0] = system.xRed / system.yRed;
815  X[1] = system.xGreen / system.yGreen;
816  X[2] = system.xBlue / system.yBlue;
817  X[3] = system.xWhite / system.yWhite;
818 
819  Z[0] = (1 - system.xRed - system.yRed) / system.yRed;
820  Z[1] = (1 - system.xGreen - system.yGreen) / system.yGreen;
821  Z[2] = (1 - system.xBlue - system.yBlue) / system.yBlue;
822  Z[3] = (1 - system.xWhite - system.yWhite) / system.yWhite;
823 
824  for (i = 0; i < 3; i++) {
825  m[0][i] = X[i];
826  m[1][i] = 1;
827  m[2][i] = Z[i];
828  }
829 
830  invert_matrix3x3(m, m);
831 
832  for (i = 0; i < 3; i++)
833  S[i] = m[i][0] * X[3] + m[i][1] * 1 + m[i][2] * Z[3];
834 
835  for (i = 0; i < 3; i++) {
836  m[0][i] = S[i] * X[i];
837  m[1][i] = S[i] * 1;
838  m[2][i] = S[i] * Z[i];
839  }
840 }
841 
842 static void
843 rgb_to_xy(float rc,
844  float gc,
845  float bc,
846  float * const x,
847  float * const y,
848  float * const z,
849  const float m[3][3])
850 {
851  float scale;
852 
853  *x = m[0][0] * rc + m[0][1] * gc + m[0][2] * bc;
854  *y = m[1][0] * rc + m[1][1] * gc + m[1][2] * bc;
855  *z = m[2][0] * rc + m[2][1] * gc + m[2][2] * bc;
856 
857  scale = *x + *y + *z;
858  scale = 1.f / scale;
859  *x = *x * scale;
860  *y = *y * scale;
861 }
862 
863 static int
864 constrain_rgb(float * const r,
865  float * const g,
866  float * const b)
867 {
868 /*----------------------------------------------------------------------------
869  If the requested RGB shade contains a negative weight for one of
870  the primaries, it lies outside the color gamut accessible from
871  the given triple of primaries. Desaturate it by adding white,
872  equal quantities of R, G, and B, enough to make RGB all positive.
873 -----------------------------------------------------------------------------*/
874  float w;
875 
876  /* Amount of white needed is w = - min(0, *r, *g, *b) */
877  w = (0 < *r) ? 0 : *r;
878  w = (w < *g) ? w : *g;
879  w = (w < *b) ? w : *b;
880  w = - w;
881 
882  /* Add just enough white to make r, g, b all positive. */
883  if (w > 0) {
884  *r += w; *g += w; *b += w;
885 
886  return 1; /* Color modified to fit RGB gamut */
887  }
888 
889  return 0; /* Color within RGB gamut */
890 }
891 
892 static void
893 gamma_correct(const struct ColorSystem * const cs,
894  float * const c)
895 {
896 /*----------------------------------------------------------------------------
897  Transform linear RGB values to nonlinear RGB values.
898 
899  Rec. 709 is ITU-R Recommendation BT. 709 (1990)
900  ``Basic Parameter Values for the HDTV Standard for the Studio and for
901  International Programme Exchange'', formerly CCIR Rec. 709.
902 
903  For details see
904  http://www.inforamp.net/~poynton/ColorFAQ.html
905  http://www.inforamp.net/~poynton/GammaFAQ.html
906 -----------------------------------------------------------------------------*/
907  float gamma;
908  float cc;
909 
910  gamma = cs->gamma;
911 
912  if (gamma == 0.) {
913  /* Rec. 709 gamma correction. */
914  cc = 0.018;
915  if (*c < cc) {
916  *c *= (1.099 * pow(cc, 0.45) - 0.099) / cc;
917  } else {
918  *c = 1.099 * pow(*c, 0.45) - 0.099;
919  }
920  } else {
921  /* Nonlinear color = (Linear color)^(1/gamma) */
922  *c = pow(*c, 1./gamma);
923  }
924 }
925 
926 
927 
928 static void
929 gamma_correct_rgb(const struct ColorSystem * const cs,
930  float * const r,
931  float * const g,
932  float * const b)
933 {
934  gamma_correct(cs, r);
935  gamma_correct(cs, g);
936  gamma_correct(cs, b);
937 }
938 
939 /* Sz(X) is the displacement in pixels of a displacement of X normalized
940  distance units. (A normalized distance unit is 1/512 of the smaller
941  dimension of the canvas)
942 */
943 #define Sz(x) (((x) * (int)FFMIN(w, h)) / 512)
944 
945 static void
946 monochrome_color_location(float waveLength, int w, int h,
947  int cie, int *xP, int *yP)
948 {
949  const int ix = waveLength - 360;
950  const float pX = spectral_chromaticity[ix][0];
951  const float pY = spectral_chromaticity[ix][1];
952  const float pZ = spectral_chromaticity[ix][2];
953  const float px = pX / (pX + pY + pZ);
954  const float py = pY / (pX + pY + pZ);
955 
956  if (cie == LUV) {
957  float up, vp;
958 
959  xy_to_upvp(px, py, &up, &vp);
960  *xP = up * (w - 1);
961  *yP = (h - 1) - vp * (h - 1);
962  } else if (cie == UCS) {
963  float u, v;
964 
965  xy_to_uv(px, py, &u, &v);
966  *xP = u * (w - 1);
967  *yP = (h - 1) - v * (h - 1);
968  } else if (cie == XYY) {
969  *xP = px * (w - 1);
970  *yP = (h - 1) - py * (h - 1);
971  } else {
972  av_assert0(0);
973  }
974 }
975 
976 static void
977 find_tongue(uint16_t* const pixels,
978  int const w,
979  int const linesize,
980  int const row,
981  int * const presentP,
982  int * const leftEdgeP,
983  int * const rightEdgeP)
984 {
985  int i;
986 
987  for (i = 0; i < w && pixels[row * linesize + i * 4 + 0] == 0; i++)
988  ;
989 
990  if (i >= w) {
991  *presentP = 0;
992  } else {
993  int j;
994  int const leftEdge = i;
995 
996  *presentP = 1;
997 
998  for (j = w - 1; j >= leftEdge && pixels[row * linesize + j * 4 + 0] == 0; j--)
999  ;
1000 
1001  *rightEdgeP = j;
1002  *leftEdgeP = leftEdge;
1003  }
1004 }
1005 
1006 static void draw_line(uint16_t *const pixels, int linesize,
1007  int x0, int y0, int x1, int y1,
1008  int w, int h,
1009  const uint16_t *const rgbcolor)
1010 {
1011  int sx = x0 < x1 ? 1 : -1, sy = y0 < y1 ? 1 : -1, x2;
1012  int dx = FFABS(x1-x0), dy = FFABS(y1-y0), err = dx * dx + dy * dy;
1013  int e2 = err == 0 ? 1 : 0xffffff / (dx + dy);
1014 
1015  dx *= e2;
1016  dy *= e2;
1017  err = dx - dy;
1018 
1019  for (;;) {
1020  pixels[y0 * linesize + x0 * 4 + 0] = rgbcolor[0]-(FFABS(err - dx + dy) >> 8);
1021  pixels[y0 * linesize + x0 * 4 + 1] = rgbcolor[1]-(FFABS(err - dx + dy) >> 8);
1022  pixels[y0 * linesize + x0 * 4 + 2] = rgbcolor[2]-(FFABS(err - dx + dy) >> 8);
1023  pixels[y0 * linesize + x0 * 4 + 3] = rgbcolor[3]-(FFABS(err - dx + dy) >> 8);
1024 
1025  e2 = err;
1026  x2 = x0;
1027  if (2 * e2 >= -dx) {
1028  if (x0 == x1)
1029  break;
1030  if (e2 + dy < 0xff0000) {
1031  pixels[(y0 + sy) * linesize + x0 * 4 + 0] = rgbcolor[0]-(FFABS(e2 + dy) >> 8);
1032  pixels[(y0 + sy) * linesize + x0 * 4 + 1] = rgbcolor[1]-(FFABS(e2 + dy) >> 8);
1033  pixels[(y0 + sy) * linesize + x0 * 4 + 2] = rgbcolor[2]-(FFABS(e2 + dy) >> 8);
1034  pixels[(y0 + sy) * linesize + x0 * 4 + 3] = rgbcolor[3]-(FFABS(e2 + dy) >> 8);
1035  }
1036  err -= dy;
1037  x0 += sx;
1038  }
1039 
1040  if (2 * e2 <= dy) {
1041  if (y0 == y1)
1042  break;
1043  if (dx - e2 < 0xff0000) {
1044  pixels[y0 * linesize + (x2 + sx) * 4 + 0] = rgbcolor[0]-(FFABS(dx - e2) >> 8);
1045  pixels[y0 * linesize + (x2 + sx) * 4 + 1] = rgbcolor[1]-(FFABS(dx - e2) >> 8);
1046  pixels[y0 * linesize + (x2 + sx) * 4 + 2] = rgbcolor[2]-(FFABS(dx - e2) >> 8);
1047  pixels[y0 * linesize + (x2 + sx) * 4 + 3] = rgbcolor[3]-(FFABS(dx - e2) >> 8);
1048  }
1049  err += dx;
1050  y0 += sy;
1051  }
1052  }
1053 }
1054 
1055 static void draw_rline(uint16_t *const pixels, int linesize,
1056  int x0, int y0, int x1, int y1,
1057  int w, int h)
1058 {
1059  int dx = FFABS(x1 - x0), sx = x0 < x1 ? 1 : -1;
1060  int dy = FFABS(y1 - y0), sy = y0 < y1 ? 1 : -1;
1061  int err = (dx > dy ? dx : -dy) / 2, e2;
1062 
1063  for (;;) {
1064  pixels[y0 * linesize + x0 * 4 + 0] = 65535 - pixels[y0 * linesize + x0 * 4 + 0];
1065  pixels[y0 * linesize + x0 * 4 + 1] = 65535 - pixels[y0 * linesize + x0 * 4 + 1];
1066  pixels[y0 * linesize + x0 * 4 + 2] = 65535 - pixels[y0 * linesize + x0 * 4 + 2];
1067  pixels[y0 * linesize + x0 * 4 + 3] = 65535;
1068 
1069  if (x0 == x1 && y0 == y1)
1070  break;
1071 
1072  e2 = err;
1073 
1074  if (e2 >-dx) {
1075  err -= dy;
1076  x0 += sx;
1077  }
1078 
1079  if (e2 < dy) {
1080  err += dx;
1081  y0 += sy;
1082  }
1083  }
1084 }
1085 
1086 static void
1087 tongue_outline(uint16_t* const pixels,
1088  int const linesize,
1089  int const w,
1090  int const h,
1091  uint16_t const maxval,
1092  int const cie)
1093 {
1094  const uint16_t rgbcolor[4] = { maxval, maxval, maxval, maxval };
1095  int wavelength;
1096  int lx, ly;
1097  int fx, fy;
1098 
1099  for (wavelength = 360; wavelength <= 830; wavelength++) {
1100  int icx, icy;
1101 
1102  monochrome_color_location(wavelength, w, h, cie,
1103  &icx, &icy);
1104 
1105  if (wavelength > 360)
1106  draw_line(pixels, linesize, lx, ly, icx, icy, w, h, rgbcolor);
1107  else {
1108  fx = icx;
1109  fy = icy;
1110  }
1111  lx = icx;
1112  ly = icy;
1113  }
1114  draw_line(pixels, linesize, lx, ly, fx, fy, w, h, rgbcolor);
1115 }
1116 
1117 static void
1118 fill_in_tongue(uint16_t* const pixels,
1119  int const linesize,
1120  int const w,
1121  int const h,
1122  uint16_t const maxval,
1123  const struct ColorSystem * const cs,
1124  float const m[3][3],
1125  int const cie,
1126  int const correct_gamma,
1127  float const contrast)
1128 {
1129  int y;
1130 
1131  /* Scan the image line by line and fill the tongue outline
1132  with the RGB values determined by the color system for the x-y
1133  co-ordinates within the tongue.
1134  */
1135 
1136  for (y = 0; y < h; ++y) {
1137  int present; /* There is some tongue on this line */
1138  int leftEdge; /* x position of leftmost pixel in tongue on this line */
1139  int rightEdge; /* same, but rightmost */
1140 
1141  find_tongue(pixels, w, linesize, y, &present, &leftEdge, &rightEdge);
1142 
1143  if (present) {
1144  int x;
1145 
1146  for (x = leftEdge; x <= rightEdge; ++x) {
1147  float cx, cy, cz, jr, jg, jb, jmax;
1148  int r, g, b, mx = maxval;
1149 
1150  if (cie == LUV) {
1151  float up, vp;
1152  up = ((float) x) / (w - 1);
1153  vp = 1.0 - ((float) y) / (h - 1);
1154  upvp_to_xy(up, vp, &cx, &cy);
1155  cz = 1.0 - (cx + cy);
1156  } else if (cie == UCS) {
1157  float u, v;
1158  u = ((float) x) / (w - 1);
1159  v = 1.0 - ((float) y) / (h - 1);
1160  uv_to_xy(u, v, &cx, &cy);
1161  cz = 1.0 - (cx + cy);
1162  } else if (cie == XYY) {
1163  cx = ((float) x) / (w - 1);
1164  cy = 1.0 - ((float) y) / (h - 1);
1165  cz = 1.0 - (cx + cy);
1166  } else {
1167  av_assert0(0);
1168  }
1169 
1170  xyz_to_rgb(m, cx, cy, cz, &jr, &jg, &jb);
1171 
1172  /* Check whether the requested color is within the
1173  gamut achievable with the given color system. If
1174  not, draw it in a reduced intensity, interpolated
1175  by desaturation to the closest within-gamut color. */
1176 
1177  if (constrain_rgb(&jr, &jg, &jb))
1178  mx *= contrast;
1179 
1180  jmax = FFMAX3(jr, jg, jb);
1181  if (jmax > 0) {
1182  jr = jr / jmax;
1183  jg = jg / jmax;
1184  jb = jb / jmax;
1185  }
1186  /* gamma correct from linear rgb to nonlinear rgb. */
1187  if (correct_gamma)
1188  gamma_correct_rgb(cs, &jr, &jg, &jb);
1189  r = mx * jr;
1190  g = mx * jg;
1191  b = mx * jb;
1192  pixels[y * linesize + x * 4 + 0] = r;
1193  pixels[y * linesize + x * 4 + 1] = g;
1194  pixels[y * linesize + x * 4 + 2] = b;
1195  pixels[y * linesize + x * 4 + 3] = 65535;
1196  }
1197  }
1198  }
1199 }
1200 
1201 static void
1202 plot_white_point(uint16_t* pixels,
1203  int const linesize,
1204  int const w,
1205  int const h,
1206  int const maxval,
1207  int const color_system,
1208  int const cie)
1209 {
1210  const struct ColorSystem *cs = &color_systems[color_system];
1211  int wx, wy;
1212 
1213  if (cie == LUV) {
1214  float wup, wvp;
1215  xy_to_upvp(cs->xWhite, cs->yWhite, &wup, &wvp);
1216  wx = (w - 1) * wup;
1217  wy = (h - 1) - ((int) ((h - 1) * wvp));
1218  } else if (cie == UCS) {
1219  float wu, wv;
1220  xy_to_uv(cs->xWhite, cs->yWhite, &wu, &wv);
1221  wx = (w - 1) * wu;
1222  wy = (h - 1) - ((int) ((h - 1) * wv));
1223  } else if (cie == XYY) {
1224  wx = (w - 1) * cs->xWhite;
1225  wy = (h - 1) - ((int) ((h - 1) * cs->yWhite));
1226  } else {
1227  av_assert0(0);
1228  }
1229 
1230  draw_rline(pixels, linesize,
1231  wx + Sz(3), wy, wx + Sz(10), wy,
1232  w, h);
1233  draw_rline(pixels, linesize,
1234  wx - Sz(3), wy, wx - Sz(10), wy,
1235  w, h);
1236  draw_rline(pixels, linesize,
1237  wx, wy + Sz(3), wx, wy + Sz(10),
1238  w, h);
1239  draw_rline(pixels, linesize,
1240  wx, wy - Sz(3), wx, wy - Sz(10),
1241  w, h);
1242 }
1243 
1244 static int draw_background(AVFilterContext *ctx)
1245 {
1246  CiescopeContext *s = ctx->priv;
1247  const struct ColorSystem *cs = &color_systems[s->color_system];
1248  AVFilterLink *outlink = ctx->outputs[0];
1249  int w = s->size;
1250  int h = s->size;
1251  uint16_t *pixels;
1252 
1253  if ((s->f = ff_get_video_buffer(outlink, outlink->w, outlink->h)) == NULL)
1254  return AVERROR(ENOMEM);
1255  pixels = (uint16_t *)s->f->data[0];
1256 
1257  tongue_outline(pixels, s->f->linesize[0] / 2, w, h, 65535, s->cie);
1258 
1259  if (s->fill)
1260  fill_in_tongue(pixels, s->f->linesize[0] / 2, w, h, 65535, cs, (const float (*)[3])s->i, s->cie,
1261  s->correct_gamma, s->contrast);
1262 
1263  return 0;
1264 }
1265 
1266 static void filter_rgb48(AVFilterContext *ctx, const uint8_t *ptr,
1267  ptrdiff_t linesize,
1268  float *cx, float *cy, int x, int y)
1269 {
1270  CiescopeContext *s = ctx->priv;
1271  const float scale = 1.f / 65535.f;
1272  const uint16_t *src = (const uint16_t*)(ptr + linesize * y + x * 6);
1273  float r = (src[0] + 0.01f) * scale;
1274  float g = (src[1] + 0.01f) * scale;
1275  float b = (src[2] + 0.01f) * scale;
1276  float cz;
1277 
1278  rgb_to_xy(r, g, b, cx, cy, &cz, (const float (*)[3])s->m);
1279 }
1280 
1281 static void filter_rgba64(AVFilterContext *ctx, const uint8_t *ptr,
1282  ptrdiff_t linesize,
1283  float *cx, float *cy, int x, int y)
1284 {
1285  CiescopeContext *s = ctx->priv;
1286  const float scale = 1.f / 65535.f;
1287  const uint16_t *src = (const uint16_t*)(ptr + linesize * y + x * 8);
1288  float r = (src[0] + 0.01f) * scale;
1289  float g = (src[1] + 0.01f) * scale;
1290  float b = (src[2] + 0.01f) * scale;
1291  float cz;
1292 
1293  rgb_to_xy(r, g, b, cx, cy, &cz, (const float (*)[3])s->m);
1294 }
1295 
1296 static void filter_rgb24(AVFilterContext *ctx, const uint8_t *ptr,
1297  ptrdiff_t linesize,
1298  float *cx, float *cy, int x, int y)
1299 {
1300  CiescopeContext *s = ctx->priv;
1301  const float scale = 1.f / 255.f;
1302  const uint8_t *src = ptr + linesize * y + x * 3;
1303  float r = (src[0] + 0.01f) * scale;
1304  float g = (src[1] + 0.01f) * scale;
1305  float b = (src[2] + 0.01f) * scale;
1306  float cz;
1307 
1308  rgb_to_xy(r, g, b, cx, cy, &cz, (const float (*)[3])s->m);
1309 }
1310 
1311 static void filter_rgba(AVFilterContext *ctx, const uint8_t *ptr,
1312  ptrdiff_t linesize,
1313  float *cx, float *cy, int x, int y)
1314 {
1315  CiescopeContext *s = ctx->priv;
1316  const float scale = 1.f / 255.f;
1317  const uint8_t *src = ptr + linesize * y + x * 4;
1318  float r = (src[0] + 0.01f) * scale;
1319  float g = (src[1] + 0.01f) * scale;
1320  float b = (src[2] + 0.01f) * scale;
1321  float cz;
1322 
1323  rgb_to_xy(r, g, b, cx, cy, &cz, (const float (*)[3])s->m);
1324 }
1325 
1326 static void filter_xyz(AVFilterContext *ctx, const uint8_t *ptr,
1327  ptrdiff_t linesize,
1328  float *cx, float *cy, int x, int y)
1329 {
1330  CiescopeContext *s = ctx->priv;
1331  const uint16_t* src = (uint16_t *)(ptr + linesize * y + x * 6);
1332  float lx = s->log2lin[src[0]];
1333  float ly = s->log2lin[src[1]];
1334  float lz = s->log2lin[src[2]];
1335  float sum = lx + ly + lz;
1336 
1337  if (sum == 0)
1338  sum = 1;
1339  *cx = lx / sum;
1340  *cy = ly / sum;
1341 }
1342 
1343 static void plot_gamuts(uint16_t *pixels, int linesize, int w, int h,
1344  int cie, int gamuts)
1345 {
1346  int i;
1347 
1348  for (i = 0; i < NB_CS; i++) {
1349  const struct ColorSystem *cs = &color_systems[i];
1350  int rx, ry, gx, gy, bx, by;
1351 
1352  if (!((1 << i) & gamuts))
1353  continue;
1354  if (cie == LUV) {
1355  float wup, wvp;
1356  xy_to_upvp(cs->xRed, cs->yRed, &wup, &wvp);
1357  rx = (w - 1) * wup;
1358  ry = (h - 1) - ((int) ((h - 1) * wvp));
1359  xy_to_upvp(cs->xGreen, cs->yGreen, &wup, &wvp);
1360  gx = (w - 1) * wup;
1361  gy = (h - 1) - ((int) ((h - 1) * wvp));
1362  xy_to_upvp(cs->xBlue, cs->yBlue, &wup, &wvp);
1363  bx = (w - 1) * wup;
1364  by = (h - 1) - ((int) ((h - 1) * wvp));
1365  } else if (cie == UCS) {
1366  float wu, wv;
1367  xy_to_uv(cs->xRed, cs->yRed, &wu, &wv);
1368  rx = (w - 1) * wu;
1369  ry = (h - 1) - ((int) ((h - 1) * wv));
1370  xy_to_uv(cs->xGreen, cs->yGreen, &wu, &wv);
1371  gx = (w - 1) * wu;
1372  gy = (h - 1) - ((int) ((h - 1) * wv));
1373  xy_to_uv(cs->xBlue, cs->yBlue, &wu, &wv);
1374  bx = (w - 1) * wu;
1375  by = (h - 1) - ((int) ((h - 1) * wv));
1376  } else if (cie == XYY) {
1377  rx = (w - 1) * cs->xRed;
1378  ry = (h - 1) - ((int) ((h - 1) * cs->yRed));
1379  gx = (w - 1) * cs->xGreen;
1380  gy = (h - 1) - ((int) ((h - 1) * cs->yGreen));
1381  bx = (w - 1) * cs->xBlue;
1382  by = (h - 1) - ((int) ((h - 1) * cs->yBlue));
1383  } else {
1384  av_assert0(0);
1385  }
1386 
1387  draw_rline(pixels, linesize, rx, ry, gx, gy, w, h);
1388  draw_rline(pixels, linesize, gx, gy, bx, by, w, h);
1389  draw_rline(pixels, linesize, bx, by, rx, ry, w, h);
1390  }
1391 }
1392 
1393 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
1394 {
1395  AVFilterContext *ctx = inlink->dst;
1396  CiescopeContext *s = ctx->priv;
1397  AVFilterLink *outlink = ctx->outputs[0];
1398  int i = s->intensity * 65535;
1399  int w = outlink->w;
1400  int h = outlink->h;
1401  AVFrame *out;
1402  int ret, x, y;
1403 
1404  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
1405  if (!out) {
1406  av_frame_free(&in);
1407  return AVERROR(ENOMEM);
1408  }
1409  out->pts = in->pts;
1410  out->duration = in->duration;
1411 
1412  if (!s->background) {
1413  ret = draw_background(ctx);
1414  if (ret < 0) {
1415  av_frame_free(&out);
1416  return ret;
1417  }
1418  s->background = 1;
1419  }
1420  for (y = 0; y < outlink->h; y++) {
1421  memset(out->data[0] + y * out->linesize[0], 0, outlink->w * 8);
1422  }
1423 
1424  for (y = 0; y < in->height; y++) {
1425  const uint8_t *src = in->data[0];
1426  const ptrdiff_t src_linesize = in->linesize[0];
1427  uint16_t *dst = (uint16_t *)out->data[0];
1428  const ptrdiff_t linesize = out->linesize[0] / 2;
1429  const int w_1 = w - 1;
1430  const int h_1 = h - 1;
1431 
1432  for (x = 0; x < in->width; x++) {
1433  float cx, cy;
1434  int wx, wy, pos;
1435  int r, g, b;
1436 
1437  s->filter(ctx, src, src_linesize, &cx, &cy, x, y);
1438 
1439  if (s->cie == LUV) {
1440  float up, vp;
1441  xy_to_upvp(cx, cy, &up, &vp);
1442  cx = up;
1443  cy = vp;
1444  } else if (s->cie == UCS) {
1445  float u, v;
1446  xy_to_uv(cx, cy, &u, &v);
1447  cx = u;
1448  cy = v;
1449  }
1450 
1451  wx = w_1 * cx;
1452  wy = h_1 - h_1 * cy;
1453 
1454  if (wx < 0 || wx >= w ||
1455  wy < 0 || wy >= h)
1456  continue;
1457 
1458  pos = wy * linesize + wx * 4;
1459  r = dst[pos + 0] + i;
1460  g = dst[pos + 1] + i;
1461  b = dst[pos + 2] + i;
1462 
1463  dst[pos + 0] = FFMIN(r, 65535);
1464  dst[pos + 1] = FFMIN(g, 65535);
1465  dst[pos + 2] = FFMIN(b, 65535);
1466  dst[pos + 3] = 65535;
1467  }
1468  }
1469 
1470  for (y = 0; y < outlink->h; y++) {
1471  uint16_t *dst = (uint16_t *)(out->data[0] + y * out->linesize[0]);
1472  const uint16_t *src = (const uint16_t *)(s->f->data[0] + y * s->f->linesize[0]);
1473  for (x = 0; x < outlink->w; x++) {
1474  const int xx = x * 4;
1475  if (dst[xx + 3] == 0) {
1476  dst[xx + 0] = src[xx + 0];
1477  dst[xx + 1] = src[xx + 1];
1478  dst[xx + 2] = src[xx + 2];
1479  dst[xx + 3] = src[xx + 3];
1480  }
1481  }
1482  }
1483 
1484  if (s->show_white)
1485  plot_white_point((uint16_t *)out->data[0], out->linesize[0] / 2,
1486  outlink->w, outlink->h, 65535,
1487  s->color_system, s->cie);
1488 
1489  plot_gamuts((uint16_t *)out->data[0], out->linesize[0] / 2,
1490  outlink->w, outlink->h,
1491  s->cie, s->gamuts);
1492 
1493  av_frame_free(&in);
1494  return ff_filter_frame(outlink, out);
1495 }
1496 
1497 static void av_cold uninit(AVFilterContext *ctx)
1498 {
1499  CiescopeContext *s = ctx->priv;
1500 
1501  av_frame_free(&s->f);
1502 }
1503 
1504 static int config_input(AVFilterLink *inlink)
1505 {
1506  CiescopeContext *s = inlink->dst->priv;
1507  int i;
1508 
1509  get_rgb2xyz_matrix(color_systems[s->color_system], s->m);
1510  invert_matrix3x3(s->m, s->i);
1511 
1512  switch (inlink->format) {
1513  case AV_PIX_FMT_RGB24:
1514  s->filter = filter_rgb24;
1515  break;
1516  case AV_PIX_FMT_RGBA:
1517  s->filter = filter_rgba;
1518  break;
1519  case AV_PIX_FMT_RGB48:
1520  s->filter = filter_rgb48;
1521  break;
1522  case AV_PIX_FMT_RGBA64:
1523  s->filter = filter_rgba64;
1524  break;
1525  case AV_PIX_FMT_XYZ12:
1526  s->filter = filter_xyz;
1527  for (i = 0; i < 65536; i++)
1528  s->log2lin[i] = pow(i / 65535., s->igamma) * 65535.;
1529  break;
1530  default:
1531  av_assert0(0);
1532  }
1533 
1534  return 0;
1535 }
1536 
1537 static const AVFilterPad inputs[] = {
1538  {
1539  .name = "default",
1540  .type = AVMEDIA_TYPE_VIDEO,
1541  .filter_frame = filter_frame,
1542  .config_props = config_input,
1543  },
1544 };
1545 
1546 static const AVFilterPad outputs[] = {
1547  {
1548  .name = "default",
1549  .type = AVMEDIA_TYPE_VIDEO,
1550  .config_props = config_output,
1551  },
1552 };
1553 
1554 const AVFilter ff_vf_ciescope = {
1555  .name = "ciescope",
1556  .description = NULL_IF_CONFIG_SMALL("Video CIE scope."),
1557  .priv_size = sizeof(CiescopeContext),
1558  .priv_class = &ciescope_class,
1559  .uninit = uninit,
1560  FILTER_INPUTS(inputs),
1561  FILTER_OUTPUTS(outputs),
1562  FILTER_QUERY_FUNC(query_formats),
1563 };
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:101
XYY
@ XYY
Definition: vf_ciescope.c:33
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
ColorSystem::xGreen
float xGreen
Definition: vf_ciescope.c:171
uv_to_xy
static void uv_to_xy(float const u, float const v, float *const xc, float *const yc)
Definition: vf_ciescope.c:719
r
const char * r
Definition: vf_curves.c:126
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
CiescopeContext::fill
int fill
Definition: vf_ciescope.c:64
NB_CS
@ NB_CS
Definition: vf_ciescope.c:50
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:380
out
FILE * out
Definition: movenc.c:54
CieSystem
CieSystem
Definition: vf_ciescope.c:32
u
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:262
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_ciescope.c:142
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:969
AVFrame::duration
int64_t duration
Duration of the frame, in the same units as pts.
Definition: frame.h:728
ColorsSystems
ColorsSystems
Definition: vf_ciescope.c:39
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:99
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:330
pixdesc.h
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:437
AVFrame::width
int width
Definition: frame.h:402
w
uint8_t w
Definition: llviddspenc.c:38
C
#define C
Definition: vf_ciescope.c:654
ColorSystem::yWhite
float yWhite
Definition: vf_ciescope.c:173
inputs
static const AVFilterPad inputs[]
Definition: vf_ciescope.c:1537
AVOption
AVOption.
Definition: opt.h:251
b
#define b
Definition: input.c:41
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:171
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_ciescope.c:1504
EBUsystem
@ EBUsystem
Definition: vf_ciescope.c:41
CiescopeContext::correct_gamma
int correct_gamma
Definition: vf_ciescope.c:59
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:165
xyz_to_rgb
static void xyz_to_rgb(const float m[3][3], float xc, float yc, float zc, float *const r, float *const g, float *const b)
Definition: vf_ciescope.c:773
D65
#define D65
Definition: vf_ciescope.c:657
color_systems
static const struct ColorSystem color_systems[]
Definition: vf_ciescope.c:667
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_ciescope.c:1393
video.h
get_rgb2xyz_matrix
static void get_rgb2xyz_matrix(struct ColorSystem system, float m[3][3])
Definition: vf_ciescope.c:809
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:351
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:1055
formats.h
S
#define S(s, c, i)
Definition: flacdsp_template.c:46
upvp_to_xy
static void upvp_to_xy(float const up, float const vp, float *const xc, float *const yc)
Definition: vf_ciescope.c:732
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:407
ColorSystem::xWhite
float xWhite
Definition: vf_ciescope.c:173
filter_rgba64
static void filter_rgba64(AVFilterContext *ctx, const uint8_t *ptr, ptrdiff_t linesize, float *cx, float *cy, int x, int y)
Definition: vf_ciescope.c:1281
CiescopeContext
Definition: vf_ciescope.c:53
scale
static av_always_inline float scale(float x, float s)
Definition: vf_v360.c:1389
FLAGS
#define FLAGS
Definition: vf_ciescope.c:77
ColorSystem
Definition: vf_ciescope.c:169
CiescopeContext::cie
int cie
Definition: vf_ciescope.c:60
monochrome_color_location
static void monochrome_color_location(float waveLength, int w, int h, int cie, int *xP, int *yP)
Definition: vf_ciescope.c:946
CiescopeContext::gamuts
unsigned gamuts
Definition: vf_ciescope.c:56
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:49
in_pix_fmts
static enum AVPixelFormat in_pix_fmts[]
Definition: vf_ciescope.c:128
avassert.h
invert_matrix3x3
static void invert_matrix3x3(float in[3][3], float out[3][3])
Definition: vf_ciescope.c:782
av_cold
#define av_cold
Definition: attributes.h:90
ColorSystem::xRed
float xRed
Definition: vf_ciescope.c:170
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:1087
float
float
Definition: af_crystalizer.c:122
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
GAMMA_REC709
#define GAMMA_REC709
Definition: vf_ciescope.c:665
g
const char * g
Definition: vf_curves.c:127
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:227
ff_formats_ref
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:596
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
ctx
AVFormatContext * ctx
Definition: movenc.c:48
xy_to_uv
static void xy_to_uv(float xc, float yc, float *const u, float *const v)
Definition: vf_ciescope.c:759
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:1202
ColorSystem::yBlue
float yBlue
Definition: vf_ciescope.c:172
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:194
filter_rgb48
static void filter_rgb48(AVFilterContext *ctx, const uint8_t *ptr, ptrdiff_t linesize, float *cx, float *cy, int x, int y)
Definition: vf_ciescope.c:1266
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:64
AV_PIX_FMT_RGBA64
#define AV_PIX_FMT_RGBA64
Definition: pixfmt.h:449
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
E
#define E
Definition: vf_ciescope.c:655
NULL
#define NULL
Definition: coverity.c:32
plot_gamuts
static void plot_gamuts(uint16_t *pixels, int linesize, int w, int h, int cie, int gamuts)
Definition: vf_ciescope.c:1343
ciescope_options
static const AVOption ciescope_options[]
Definition: vf_ciescope.c:79
gamma_correct_rgb
static void gamma_correct_rgb(const struct ColorSystem *const cs, float *const r, float *const g, float *const b)
Definition: vf_ciescope.c:929
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
system
FFmpeg currently uses a custom build system
Definition: build_system.txt:1
parseutils.h
draw_background
static int draw_background(AVFilterContext *ctx)
Definition: vf_ciescope.c:1244
wRGBsystem
@ wRGBsystem
Definition: vf_ciescope.c:45
D50
#define D50
Definition: vf_ciescope.c:656
CiescopeContext::size
int size
Definition: vf_ciescope.c:57
CiescopeContext::intensity
float intensity
Definition: vf_ciescope.c:61
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
filter_xyz
static void filter_xyz(AVFilterContext *ctx, const uint8_t *ptr, ptrdiff_t linesize, float *cx, float *cy, int x, int y)
Definition: vf_ciescope.c:1326
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:1006
ColorSystem::xBlue
float xBlue
Definition: vf_ciescope.c:172
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
SMPTE240Msystem
@ SMPTE240Msystem
Definition: vf_ciescope.c:43
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:115
SMPTEsystem
@ SMPTEsystem
Definition: vf_ciescope.c:42
CiescopeContext::contrast
float contrast
Definition: vf_ciescope.c:62
CiescopeContext::m
float m[3][3]
Definition: vf_ciescope.c:69
for
for(k=2;k<=8;++k)
Definition: h264pred_template.c:425
AV_PIX_FMT_RGB48
#define AV_PIX_FMT_RGB48
Definition: pixfmt.h:445
size
int size
Definition: twinvq_data.h:10344
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(ciescope)
Rec709system
@ Rec709system
Definition: vf_ciescope.c:47
CiescopeContext::filter
void(* filter)(AVFilterContext *ctx, const uint8_t *ptr, ptrdiff_t linesize, float *cx, float *cy, int x, int y)
Definition: vf_ciescope.c:71
NTSCsystem
@ NTSCsystem
Definition: vf_ciescope.c:40
OFFSET
#define OFFSET(x)
Definition: vf_ciescope.c:76
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:977
ColorSystem::gamma
float gamma
Definition: vf_ciescope.c:174
internal.h
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:228
CiescopeContext::f
AVFrame * f
Definition: vf_ciescope.c:70
AV_PIX_FMT_XYZ12
#define AV_PIX_FMT_XYZ12
Definition: pixfmt.h:505
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
CiescopeContext::log2lin
float log2lin[65536]
Definition: vf_ciescope.c:66
ff_vf_ciescope
const AVFilter ff_vf_ciescope
Definition: vf_ciescope.c:1554
out_pix_fmts
static enum AVPixelFormat out_pix_fmts[]
Definition: vf_ciescope.c:137
uninit
static void av_cold uninit(AVFilterContext *ctx)
Definition: vf_ciescope.c:1497
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
CiescopeContext::i
float i[3][3]
Definition: vf_ciescope.c:68
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:55
LUV
@ LUV
Definition: vf_ciescope.c:35
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_ciescope.c:155
AVFilter
Filter definition.
Definition: avfilter.h:161
ret
ret
Definition: filter_design.txt:187
filter_rgba
static void filter_rgba(AVFilterContext *ctx, const uint8_t *ptr, ptrdiff_t linesize, float *cx, float *cy, int x, int y)
Definition: vf_ciescope.c:1311
CiescopeContext::color_system
int color_system
Definition: vf_ciescope.c:55
rgb_to_xy
static void rgb_to_xy(float rc, float gc, float bc, float *const x, float *const y, float *const z, const float m[3][3])
Definition: vf_ciescope.c:843
pos
unsigned int pos
Definition: spdifenc.c:413
NB_CIE
@ NB_CIE
Definition: vf_ciescope.c:36
AVFrame::height
int height
Definition: frame.h:402
CiescopeContext::background
int background
Definition: vf_ciescope.c:63
DCIP3
@ DCIP3
Definition: vf_ciescope.c:49
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
Sz
#define Sz(x)
Definition: vf_ciescope.c:943
xy_to_upvp
static void xy_to_upvp(float xc, float yc, float *const up, float *const vp)
Definition: vf_ciescope.c:745
APPLEsystem
@ APPLEsystem
Definition: vf_ciescope.c:44
AVFilterContext
An instance of a filter.
Definition: avfilter.h:392
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
spectral_chromaticity
static const float spectral_chromaticity[][3]
Definition: vf_ciescope.c:177
CiescopeContext::igamma
float igamma
Definition: vf_ciescope.c:67
Rec2020system
@ Rec2020system
Definition: vf_ciescope.c:48
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:195
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
filter_rgb24
static void filter_rgb24(AVFilterContext *ctx, const uint8_t *ptr, ptrdiff_t linesize, float *cx, float *cy, int x, int y)
Definition: vf_ciescope.c:1296
FFMAX3
#define FFMAX3(a, b, c)
Definition: macros.h:48
gamma_correct
static void gamma_correct(const struct ColorSystem *const cs, float *const c)
Definition: vf_ciescope.c:893
AV_OPT_TYPE_FLAGS
@ AV_OPT_TYPE_FLAGS
Definition: opt.h:224
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:375
X
@ X
Definition: vf_addroi.c:26
h
h
Definition: vp9dsp_template.c:2038
ColorSystem::yGreen
float yGreen
Definition: vf_ciescope.c:171
int
int
Definition: ffmpeg_filter.c:156
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
constrain_rgb
static int constrain_rgb(float *const r, float *const g, float *const b)
Definition: vf_ciescope.c:864
CiescopeContext::show_white
int show_white
Definition: vf_ciescope.c:58
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, float const m[3][3], int const cie, int const correct_gamma, float const contrast)
Definition: vf_ciescope.c:1118
ColorSystem::yRed
float yRed
Definition: vf_ciescope.c:170
outputs
static const AVFilterPad outputs[]
Definition: vf_ciescope.c:1546
CIE1931system
@ CIE1931system
Definition: vf_ciescope.c:46
UCS
@ UCS
Definition: vf_ciescope.c:34
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