1 /*
2 * Copyright (c) 2013 Clément Bœsch
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "libavutil/opt.h"
22 #include "libavutil/bprint.h"
23 #include "libavutil/eval.h"
24 #include "libavutil/file.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/avassert.h"
27 #include "libavutil/pixdesc.h"
28 #include "avfilter.h"
29 #include "drawutils.h"
30 #include "formats.h"
31 #include "internal.h"
32 #include "video.h"
33
34 #define R 0
35 #define G 1
36 #define B 2
37 #define A 3
38
39 struct keypoint {
40 double x, y;
41 struct keypoint *next;
42 };
43
44 #define NB_COMP 3
45
46 enum preset {
47 PRESET_NONE,
48 PRESET_COLOR_NEGATIVE,
49 PRESET_CROSS_PROCESS,
50 PRESET_DARKER,
51 PRESET_INCREASE_CONTRAST,
52 PRESET_LIGHTER,
53 PRESET_LINEAR_CONTRAST,
54 PRESET_MEDIUM_CONTRAST,
55 PRESET_NEGATIVE,
56 PRESET_STRONG_CONTRAST,
57 PRESET_VINTAGE,
58 NB_PRESETS,
59 };
60
61 typedef struct CurvesContext {
62 const AVClass *class;
63 int preset;
64 char *comp_points_str[NB_COMP + 1];
65 char *comp_points_str_all;
66 uint16_t *graph[NB_COMP + 1];
67 int lut_size;
68 char *psfile;
69 uint8_t rgba_map[4];
70 int step;
71 char *plot_filename;
72 int saved_plot;
73 int is_16bit;
74 int depth;
75 int parsed_psfile;
76
77 int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
78 } CurvesContext;
79
80 typedef struct ThreadData {
81 AVFrame *in, *out;
82 } ThreadData;
83
84 #define OFFSET(x) offsetof(CurvesContext, x)
85 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
86 static const AVOption curves_options[] = {
87 { "preset", "select a color curves preset", OFFSET(preset), AV_OPT_TYPE_INT, {.i64=PRESET_NONE}, PRESET_NONE, NB_PRESETS-1, FLAGS, "preset_name" },
88 { "none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_NONE}, 0, 0, FLAGS, "preset_name" },
89 { "color_negative", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_COLOR_NEGATIVE}, 0, 0, FLAGS, "preset_name" },
90 { "cross_process", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_CROSS_PROCESS}, 0, 0, FLAGS, "preset_name" },
91 { "darker", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_DARKER}, 0, 0, FLAGS, "preset_name" },
92 { "increase_contrast", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_INCREASE_CONTRAST}, 0, 0, FLAGS, "preset_name" },
93 { "lighter", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_LIGHTER}, 0, 0, FLAGS, "preset_name" },
94 { "linear_contrast", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_LINEAR_CONTRAST}, 0, 0, FLAGS, "preset_name" },
95 { "medium_contrast", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_MEDIUM_CONTRAST}, 0, 0, FLAGS, "preset_name" },
96 { "negative", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_NEGATIVE}, 0, 0, FLAGS, "preset_name" },
97 { "strong_contrast", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_STRONG_CONTRAST}, 0, 0, FLAGS, "preset_name" },
98 { "vintage", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_VINTAGE}, 0, 0, FLAGS, "preset_name" },
99 { "master","set master points coordinates",OFFSET(comp_points_str[NB_COMP]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
100 { "m", "set master points coordinates",OFFSET(comp_points_str[NB_COMP]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
101 { "red", "set red points coordinates", OFFSET(comp_points_str[0]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
102 { "r", "set red points coordinates", OFFSET(comp_points_str[0]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
103 { "green", "set green points coordinates", OFFSET(comp_points_str[1]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
104 { "g", "set green points coordinates", OFFSET(comp_points_str[1]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
105 { "blue", "set blue points coordinates", OFFSET(comp_points_str[2]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
106 { "b", "set blue points coordinates", OFFSET(comp_points_str[2]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
107 { "all", "set points coordinates for all components", OFFSET(comp_points_str_all), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
108 { "psfile", "set Photoshop curves file name", OFFSET(psfile), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
109 { "plot", "save Gnuplot script of the curves in specified file", OFFSET(plot_filename), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
110 { NULL }
111 };
112
113 AVFILTER_DEFINE_CLASS(curves);
114
115 static const struct {
116 const char *r;
117 const char *g;
118 const char *b;
119 const char *master;
120 } curves_presets[] = {
121 [PRESET_COLOR_NEGATIVE] = {
122 "0.129/1 0.466/0.498 0.725/0",
123 "0.109/1 0.301/0.498 0.517/0",
124 "0.098/1 0.235/0.498 0.423/0",
125 },
126 [PRESET_CROSS_PROCESS] = {
127 "0/0 0.25/0.156 0.501/0.501 0.686/0.745 1/1",
128 "0/0 0.25/0.188 0.38/0.501 0.745/0.815 1/0.815",
129 "0/0 0.231/0.094 0.709/0.874 1/1",
130 },
131 [PRESET_DARKER] = { .master = "0/0 0.5/0.4 1/1" },
132 [PRESET_INCREASE_CONTRAST] = { .master = "0/0 0.149/0.066 0.831/0.905 0.905/0.98 1/1" },
133 [PRESET_LIGHTER] = { .master = "0/0 0.4/0.5 1/1" },
134 [PRESET_LINEAR_CONTRAST] = { .master = "0/0 0.305/0.286 0.694/0.713 1/1" },
135 [PRESET_MEDIUM_CONTRAST] = { .master = "0/0 0.286/0.219 0.639/0.643 1/1" },
136 [PRESET_NEGATIVE] = { .master = "0/1 1/0" },
137 [PRESET_STRONG_CONTRAST] = { .master = "0/0 0.301/0.196 0.592/0.6 0.686/0.737 1/1" },
138 [PRESET_VINTAGE] = {
139 "0/0.11 0.42/0.51 1/0.95",
140 "0/0 0.50/0.48 1/1",
141 "0/0.22 0.49/0.44 1/0.8",
142 }
143 };
144
make_point(double x,double y,struct keypoint * next)145 static struct keypoint *make_point(double x, double y, struct keypoint *next)
146 {
147 struct keypoint *point = av_mallocz(sizeof(*point));
148
149 if (!point)
150 return NULL;
151 point->x = x;
152 point->y = y;
153 point->next = next;
154 return point;
155 }
156
parse_points_str(AVFilterContext * ctx,struct keypoint ** points,const char * s,int lut_size)157 static int parse_points_str(AVFilterContext *ctx, struct keypoint **points, const char *s,
158 int lut_size)
159 {
160 char *p = (char *)s; // strtod won't alter the string
161 struct keypoint *last = NULL;
162 const int scale = lut_size - 1;
163
164 /* construct a linked list based on the key points string */
165 while (p && *p) {
166 struct keypoint *point = make_point(0, 0, NULL);
167 if (!point)
168 return AVERROR(ENOMEM);
169 point->x = av_strtod(p, &p); if (p && *p) p++;
170 point->y = av_strtod(p, &p); if (p && *p) p++;
171 if (point->x < 0 || point->x > 1 || point->y < 0 || point->y > 1) {
172 av_log(ctx, AV_LOG_ERROR, "Invalid key point coordinates (%f;%f), "
173 "x and y must be in the [0;1] range.\n", point->x, point->y);
174 return AVERROR(EINVAL);
175 }
176 if (!*points)
177 *points = point;
178 if (last) {
179 if ((int)(last->x * scale) >= (int)(point->x * scale)) {
180 av_log(ctx, AV_LOG_ERROR, "Key point coordinates (%f;%f) "
181 "and (%f;%f) are too close from each other or not "
182 "strictly increasing on the x-axis\n",
183 last->x, last->y, point->x, point->y);
184 return AVERROR(EINVAL);
185 }
186 last->next = point;
187 }
188 last = point;
189 }
190
191 if (*points && !(*points)->next) {
192 av_log(ctx, AV_LOG_WARNING, "Only one point (at (%f;%f)) is defined, "
193 "this is unlikely to behave as you expect. You probably want"
194 "at least 2 points.",
195 (*points)->x, (*points)->y);
196 }
197
198 return 0;
199 }
200
get_nb_points(const struct keypoint * d)201 static int get_nb_points(const struct keypoint *d)
202 {
203 int n = 0;
204 while (d) {
205 n++;
206 d = d->next;
207 }
208 return n;
209 }
210
211 /**
212 * Natural cubic spline interpolation
213 * Finding curves using Cubic Splines notes by Steven Rauch and John Stockie.
214 * @see http://people.math.sfu.ca/~stockie/teaching/macm316/notes/splines.pdf
215 */
216
217 #define CLIP(v) (nbits == 8 ? av_clip_uint8(v) : av_clip_uintp2_c(v, nbits))
218
interpolate(void * log_ctx,uint16_t * y,const struct keypoint * points,int nbits)219 static inline int interpolate(void *log_ctx, uint16_t *y,
220 const struct keypoint *points, int nbits)
221 {
222 int i, ret = 0;
223 const struct keypoint *point = points;
224 double xprev = 0;
225 const int lut_size = 1<<nbits;
226 const int scale = lut_size - 1;
227
228 double (*matrix)[3];
229 double *h, *r;
230 const int n = get_nb_points(points); // number of splines
231
232 if (n == 0) {
233 for (i = 0; i < lut_size; i++)
234 y[i] = i;
235 return 0;
236 }
237
238 if (n == 1) {
239 for (i = 0; i < lut_size; i++)
240 y[i] = CLIP(point->y * scale);
241 return 0;
242 }
243
244 matrix = av_calloc(n, sizeof(*matrix));
245 h = av_malloc((n - 1) * sizeof(*h));
246 r = av_calloc(n, sizeof(*r));
247
248 if (!matrix || !h || !r) {
249 ret = AVERROR(ENOMEM);
250 goto end;
251 }
252
253 /* h(i) = x(i+1) - x(i) */
254 i = -1;
255 for (point = points; point; point = point->next) {
256 if (i != -1)
257 h[i] = point->x - xprev;
258 xprev = point->x;
259 i++;
260 }
261
262 /* right-side of the polynomials, will be modified to contains the solution */
263 point = points;
264 for (i = 1; i < n - 1; i++) {
265 const double yp = point->y;
266 const double yc = point->next->y;
267 const double yn = point->next->next->y;
268 r[i] = 6 * ((yn-yc)/h[i] - (yc-yp)/h[i-1]);
269 point = point->next;
270 }
271
272 #define BD 0 /* sub diagonal (below main) */
273 #define MD 1 /* main diagonal (center) */
274 #define AD 2 /* sup diagonal (above main) */
275
276 /* left side of the polynomials into a tridiagonal matrix. */
277 matrix[0][MD] = matrix[n - 1][MD] = 1;
278 for (i = 1; i < n - 1; i++) {
279 matrix[i][BD] = h[i-1];
280 matrix[i][MD] = 2 * (h[i-1] + h[i]);
281 matrix[i][AD] = h[i];
282 }
283
284 /* tridiagonal solving of the linear system */
285 for (i = 1; i < n; i++) {
286 const double den = matrix[i][MD] - matrix[i][BD] * matrix[i-1][AD];
287 const double k = den ? 1./den : 1.;
288 matrix[i][AD] *= k;
289 r[i] = (r[i] - matrix[i][BD] * r[i - 1]) * k;
290 }
291 for (i = n - 2; i >= 0; i--)
292 r[i] = r[i] - matrix[i][AD] * r[i + 1];
293
294 point = points;
295
296 /* left padding */
297 for (i = 0; i < (int)(point->x * scale); i++)
298 y[i] = CLIP(point->y * scale);
299
300 /* compute the graph with x=[x0..xN] */
301 i = 0;
302 av_assert0(point->next); // always at least 2 key points
303 while (point->next) {
304 const double yc = point->y;
305 const double yn = point->next->y;
306
307 const double a = yc;
308 const double b = (yn-yc)/h[i] - h[i]*r[i]/2. - h[i]*(r[i+1]-r[i])/6.;
309 const double c = r[i] / 2.;
310 const double d = (r[i+1] - r[i]) / (6.*h[i]);
311
312 int x;
313 const int x_start = point->x * scale;
314 const int x_end = point->next->x * scale;
315
316 av_assert0(x_start >= 0 && x_start < lut_size &&
317 x_end >= 0 && x_end < lut_size);
318
319 for (x = x_start; x <= x_end; x++) {
320 const double xx = (x - x_start) * 1./scale;
321 const double yy = a + b*xx + c*xx*xx + d*xx*xx*xx;
322 y[x] = CLIP(yy * scale);
323 av_log(log_ctx, AV_LOG_DEBUG, "f(%f)=%f -> y[%d]=%d\n", xx, yy, x, y[x]);
324 }
325
326 point = point->next;
327 i++;
328 }
329
330 /* right padding */
331 for (i = (int)(point->x * scale); i < lut_size; i++)
332 y[i] = CLIP(point->y * scale);
333
334 end:
335 av_free(matrix);
336 av_free(h);
337 av_free(r);
338 return ret;
339 }
340
341 #define DECLARE_INTERPOLATE_FUNC(nbits) \
342 static int interpolate##nbits(void *log_ctx, uint16_t *y, \
343 const struct keypoint *points) \
344 { \
345 return interpolate(log_ctx, y, points, nbits); \
346 }
347
348 DECLARE_INTERPOLATE_FUNC(8)
349 DECLARE_INTERPOLATE_FUNC(9)
350 DECLARE_INTERPOLATE_FUNC(10)
351 DECLARE_INTERPOLATE_FUNC(12)
352 DECLARE_INTERPOLATE_FUNC(14)
353 DECLARE_INTERPOLATE_FUNC(16)
354
parse_psfile(AVFilterContext * ctx,const char * fname)355 static int parse_psfile(AVFilterContext *ctx, const char *fname)
356 {
357 CurvesContext *curves = ctx->priv;
358 uint8_t *buf;
359 size_t size;
360 int i, ret, av_unused(version), nb_curves;
361 AVBPrint ptstr;
362 static const int comp_ids[] = {3, 0, 1, 2};
363
364 av_bprint_init(&ptstr, 0, AV_BPRINT_SIZE_AUTOMATIC);
365
366 ret = av_file_map(fname, &buf, &size, 0, NULL);
367 if (ret < 0)
368 return ret;
369
370 #define READ16(dst) do { \
371 if (size < 2) { \
372 ret = AVERROR_INVALIDDATA; \
373 goto end; \
374 } \
375 dst = AV_RB16(buf); \
376 buf += 2; \
377 size -= 2; \
378 } while (0)
379
380 READ16(version);
381 READ16(nb_curves);
382 for (i = 0; i < FFMIN(nb_curves, FF_ARRAY_ELEMS(comp_ids)); i++) {
383 int nb_points, n;
384 av_bprint_clear(&ptstr);
385 READ16(nb_points);
386 for (n = 0; n < nb_points; n++) {
387 int y, x;
388 READ16(y);
389 READ16(x);
390 av_bprintf(&ptstr, "%f/%f ", x / 255., y / 255.);
391 }
392 if (*ptstr.str) {
393 char **pts = &curves->comp_points_str[comp_ids[i]];
394 if (!*pts) {
395 *pts = av_strdup(ptstr.str);
396 av_log(ctx, AV_LOG_DEBUG, "curves %d (intid=%d) [%d points]: [%s]\n",
397 i, comp_ids[i], nb_points, *pts);
398 if (!*pts) {
399 ret = AVERROR(ENOMEM);
400 goto end;
401 }
402 }
403 }
404 }
405 end:
406 av_bprint_finalize(&ptstr, NULL);
407 av_file_unmap(buf, size);
408 return ret;
409 }
410
dump_curves(const char * fname,uint16_t * graph[NB_COMP+1],struct keypoint * comp_points[NB_COMP+1],int lut_size)411 static int dump_curves(const char *fname, uint16_t *graph[NB_COMP + 1],
412 struct keypoint *comp_points[NB_COMP + 1],
413 int lut_size)
414 {
415 int i;
416 AVBPrint buf;
417 const double scale = 1. / (lut_size - 1);
418 static const char * const colors[] = { "red", "green", "blue", "#404040", };
419 FILE *f = avpriv_fopen_utf8(fname, "w");
420
421 av_assert0(FF_ARRAY_ELEMS(colors) == NB_COMP + 1);
422
423 if (!f) {
424 int ret = AVERROR(errno);
425 av_log(NULL, AV_LOG_ERROR, "Cannot open file '%s' for writing: %s\n",
426 fname, av_err2str(ret));
427 return ret;
428 }
429
430 av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
431
432 av_bprintf(&buf, "set xtics 0.1\n");
433 av_bprintf(&buf, "set ytics 0.1\n");
434 av_bprintf(&buf, "set size square\n");
435 av_bprintf(&buf, "set grid\n");
436
437 for (i = 0; i < FF_ARRAY_ELEMS(colors); i++) {
438 av_bprintf(&buf, "%s'-' using 1:2 with lines lc '%s' title ''",
439 i ? ", " : "plot ", colors[i]);
440 if (comp_points[i])
441 av_bprintf(&buf, ", '-' using 1:2 with points pointtype 3 lc '%s' title ''",
442 colors[i]);
443 }
444 av_bprintf(&buf, "\n");
445
446 for (i = 0; i < FF_ARRAY_ELEMS(colors); i++) {
447 int x;
448
449 /* plot generated values */
450 for (x = 0; x < lut_size; x++)
451 av_bprintf(&buf, "%f %f\n", x * scale, graph[i][x] * scale);
452 av_bprintf(&buf, "e\n");
453
454 /* plot user knots */
455 if (comp_points[i]) {
456 const struct keypoint *point = comp_points[i];
457
458 while (point) {
459 av_bprintf(&buf, "%f %f\n", point->x, point->y);
460 point = point->next;
461 }
462 av_bprintf(&buf, "e\n");
463 }
464 }
465
466 fwrite(buf.str, 1, buf.len, f);
467 fclose(f);
468 av_bprint_finalize(&buf, NULL);
469 return 0;
470 }
471
curves_init(AVFilterContext * ctx)472 static av_cold int curves_init(AVFilterContext *ctx)
473 {
474 int i, ret;
475 CurvesContext *curves = ctx->priv;
476 char **pts = curves->comp_points_str;
477 const char *allp = curves->comp_points_str_all;
478
479 //if (!allp && curves->preset != PRESET_NONE && curves_presets[curves->preset].all)
480 // allp = curves_presets[curves->preset].all;
481
482 if (allp) {
483 for (i = 0; i < NB_COMP; i++) {
484 if (!pts[i])
485 pts[i] = av_strdup(allp);
486 if (!pts[i])
487 return AVERROR(ENOMEM);
488 }
489 }
490
491 if (curves->psfile && !curves->parsed_psfile) {
492 ret = parse_psfile(ctx, curves->psfile);
493 if (ret < 0)
494 return ret;
495 curves->parsed_psfile = 1;
496 }
497
498 if (curves->preset != PRESET_NONE) {
499 #define SET_COMP_IF_NOT_SET(n, name) do { \
500 if (!pts[n] && curves_presets[curves->preset].name) { \
501 pts[n] = av_strdup(curves_presets[curves->preset].name); \
502 if (!pts[n]) \
503 return AVERROR(ENOMEM); \
504 } \
505 } while (0)
506 SET_COMP_IF_NOT_SET(0, r);
507 SET_COMP_IF_NOT_SET(1, g);
508 SET_COMP_IF_NOT_SET(2, b);
509 SET_COMP_IF_NOT_SET(3, master);
510 curves->preset = PRESET_NONE;
511 }
512
513 return 0;
514 }
515
filter_slice_packed(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)516 static int filter_slice_packed(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
517 {
518 int x, y;
519 const CurvesContext *curves = ctx->priv;
520 const ThreadData *td = arg;
521 const AVFrame *in = td->in;
522 const AVFrame *out = td->out;
523 const int direct = out == in;
524 const int step = curves->step;
525 const uint8_t r = curves->rgba_map[R];
526 const uint8_t g = curves->rgba_map[G];
527 const uint8_t b = curves->rgba_map[B];
528 const uint8_t a = curves->rgba_map[A];
529 const int slice_start = (in->height * jobnr ) / nb_jobs;
530 const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
531
532 if (curves->is_16bit) {
533 for (y = slice_start; y < slice_end; y++) {
534 uint16_t *dstp = ( uint16_t *)(out->data[0] + y * out->linesize[0]);
535 const uint16_t *srcp = (const uint16_t *)(in ->data[0] + y * in->linesize[0]);
536
537 for (x = 0; x < in->width * step; x += step) {
538 dstp[x + r] = curves->graph[R][srcp[x + r]];
539 dstp[x + g] = curves->graph[G][srcp[x + g]];
540 dstp[x + b] = curves->graph[B][srcp[x + b]];
541 if (!direct && step == 4)
542 dstp[x + a] = srcp[x + a];
543 }
544 }
545 } else {
546 uint8_t *dst = out->data[0] + slice_start * out->linesize[0];
547 const uint8_t *src = in->data[0] + slice_start * in->linesize[0];
548
549 for (y = slice_start; y < slice_end; y++) {
550 for (x = 0; x < in->width * step; x += step) {
551 dst[x + r] = curves->graph[R][src[x + r]];
552 dst[x + g] = curves->graph[G][src[x + g]];
553 dst[x + b] = curves->graph[B][src[x + b]];
554 if (!direct && step == 4)
555 dst[x + a] = src[x + a];
556 }
557 dst += out->linesize[0];
558 src += in ->linesize[0];
559 }
560 }
561 return 0;
562 }
563
filter_slice_planar(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)564 static int filter_slice_planar(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
565 {
566 int x, y;
567 const CurvesContext *curves = ctx->priv;
568 const ThreadData *td = arg;
569 const AVFrame *in = td->in;
570 const AVFrame *out = td->out;
571 const int direct = out == in;
572 const int step = curves->step;
573 const uint8_t r = curves->rgba_map[R];
574 const uint8_t g = curves->rgba_map[G];
575 const uint8_t b = curves->rgba_map[B];
576 const uint8_t a = curves->rgba_map[A];
577 const int slice_start = (in->height * jobnr ) / nb_jobs;
578 const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
579
580 if (curves->is_16bit) {
581 for (y = slice_start; y < slice_end; y++) {
582 uint16_t *dstrp = ( uint16_t *)(out->data[r] + y * out->linesize[r]);
583 uint16_t *dstgp = ( uint16_t *)(out->data[g] + y * out->linesize[g]);
584 uint16_t *dstbp = ( uint16_t *)(out->data[b] + y * out->linesize[b]);
585 uint16_t *dstap = ( uint16_t *)(out->data[a] + y * out->linesize[a]);
586 const uint16_t *srcrp = (const uint16_t *)(in ->data[r] + y * in->linesize[r]);
587 const uint16_t *srcgp = (const uint16_t *)(in ->data[g] + y * in->linesize[g]);
588 const uint16_t *srcbp = (const uint16_t *)(in ->data[b] + y * in->linesize[b]);
589 const uint16_t *srcap = (const uint16_t *)(in ->data[a] + y * in->linesize[a]);
590
591 for (x = 0; x < in->width; x++) {
592 dstrp[x] = curves->graph[R][srcrp[x]];
593 dstgp[x] = curves->graph[G][srcgp[x]];
594 dstbp[x] = curves->graph[B][srcbp[x]];
595 if (!direct && step == 4)
596 dstap[x] = srcap[x];
597 }
598 }
599 } else {
600 uint8_t *dstr = out->data[r] + slice_start * out->linesize[r];
601 uint8_t *dstg = out->data[g] + slice_start * out->linesize[g];
602 uint8_t *dstb = out->data[b] + slice_start * out->linesize[b];
603 uint8_t *dsta = out->data[a] + slice_start * out->linesize[a];
604 const uint8_t *srcr = in->data[r] + slice_start * in->linesize[r];
605 const uint8_t *srcg = in->data[g] + slice_start * in->linesize[g];
606 const uint8_t *srcb = in->data[b] + slice_start * in->linesize[b];
607 const uint8_t *srca = in->data[a] + slice_start * in->linesize[a];
608
609 for (y = slice_start; y < slice_end; y++) {
610 for (x = 0; x < in->width; x++) {
611 dstr[x] = curves->graph[R][srcr[x]];
612 dstg[x] = curves->graph[G][srcg[x]];
613 dstb[x] = curves->graph[B][srcb[x]];
614 if (!direct && step == 4)
615 dsta[x] = srca[x];
616 }
617 dstr += out->linesize[r];
618 dstg += out->linesize[g];
619 dstb += out->linesize[b];
620 dsta += out->linesize[a];
621 srcr += in ->linesize[r];
622 srcg += in ->linesize[g];
623 srcb += in ->linesize[b];
624 srca += in ->linesize[a];
625 }
626 }
627 return 0;
628 }
629
config_input(AVFilterLink * inlink)630 static int config_input(AVFilterLink *inlink)
631 {
632 int i, j, ret;
633 AVFilterContext *ctx = inlink->dst;
634 CurvesContext *curves = ctx->priv;
635 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
636 char **pts = curves->comp_points_str;
637 struct keypoint *comp_points[NB_COMP + 1] = {0};
638
639 ff_fill_rgba_map(curves->rgba_map, inlink->format);
640 curves->is_16bit = desc->comp[0].depth > 8;
641 curves->depth = desc->comp[0].depth;
642 curves->lut_size = 1 << curves->depth;
643 curves->step = av_get_padded_bits_per_pixel(desc) >> (3 + curves->is_16bit);
644 curves->filter_slice = desc->flags & AV_PIX_FMT_FLAG_PLANAR ? filter_slice_planar : filter_slice_packed;
645
646 for (i = 0; i < NB_COMP + 1; i++) {
647 if (!curves->graph[i])
648 curves->graph[i] = av_calloc(curves->lut_size, sizeof(*curves->graph[0]));
649 if (!curves->graph[i])
650 return AVERROR(ENOMEM);
651 ret = parse_points_str(ctx, comp_points + i, curves->comp_points_str[i], curves->lut_size);
652 if (ret < 0)
653 return ret;
654 switch (curves->depth) {
655 case 8: ret = interpolate8 (ctx, curves->graph[i], comp_points[i]); break;
656 case 9: ret = interpolate9 (ctx, curves->graph[i], comp_points[i]); break;
657 case 10: ret = interpolate10(ctx, curves->graph[i], comp_points[i]); break;
658 case 12: ret = interpolate12(ctx, curves->graph[i], comp_points[i]); break;
659 case 14: ret = interpolate14(ctx, curves->graph[i], comp_points[i]); break;
660 case 16: ret = interpolate16(ctx, curves->graph[i], comp_points[i]); break;
661 }
662 if (ret < 0)
663 return ret;
664 }
665
666 if (pts[NB_COMP]) {
667 for (i = 0; i < NB_COMP; i++)
668 for (j = 0; j < curves->lut_size; j++)
669 curves->graph[i][j] = curves->graph[NB_COMP][curves->graph[i][j]];
670 }
671
672 if (av_log_get_level() >= AV_LOG_VERBOSE) {
673 for (i = 0; i < NB_COMP; i++) {
674 const struct keypoint *point = comp_points[i];
675 av_log(ctx, AV_LOG_VERBOSE, "#%d points:", i);
676 while (point) {
677 av_log(ctx, AV_LOG_VERBOSE, " (%f;%f)", point->x, point->y);
678 point = point->next;
679 }
680 }
681 }
682
683 if (curves->plot_filename && !curves->saved_plot) {
684 dump_curves(curves->plot_filename, curves->graph, comp_points, curves->lut_size);
685 curves->saved_plot = 1;
686 }
687
688 for (i = 0; i < NB_COMP + 1; i++) {
689 struct keypoint *point = comp_points[i];
690 while (point) {
691 struct keypoint *next = point->next;
692 av_free(point);
693 point = next;
694 }
695 }
696
697 return 0;
698 }
699
filter_frame(AVFilterLink * inlink,AVFrame * in)700 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
701 {
702 AVFilterContext *ctx = inlink->dst;
703 CurvesContext *curves = ctx->priv;
704 AVFilterLink *outlink = ctx->outputs[0];
705 AVFrame *out;
706 ThreadData td;
707
708 if (av_frame_is_writable(in)) {
709 out = in;
710 } else {
711 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
712 if (!out) {
713 av_frame_free(&in);
714 return AVERROR(ENOMEM);
715 }
716 av_frame_copy_props(out, in);
717 }
718
719 td.in = in;
720 td.out = out;
721 ff_filter_execute(ctx, curves->filter_slice, &td, NULL,
722 FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
723
724 if (out != in)
725 av_frame_free(&in);
726
727 return ff_filter_frame(outlink, out);
728 }
729
process_command(AVFilterContext * ctx,const char * cmd,const char * args,char * res,int res_len,int flags)730 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
731 char *res, int res_len, int flags)
732 {
733 CurvesContext *curves = ctx->priv;
734 int ret;
735
736 if (!strcmp(cmd, "plot")) {
737 curves->saved_plot = 0;
738 } else if (!strcmp(cmd, "all") || !strcmp(cmd, "preset") || !strcmp(cmd, "psfile")) {
739 if (!strcmp(cmd, "psfile"))
740 curves->parsed_psfile = 0;
741 av_freep(&curves->comp_points_str_all);
742 av_freep(&curves->comp_points_str[0]);
743 av_freep(&curves->comp_points_str[1]);
744 av_freep(&curves->comp_points_str[2]);
745 av_freep(&curves->comp_points_str[NB_COMP]);
746 } else if (!strcmp(cmd, "red") || !strcmp(cmd, "r")) {
747 av_freep(&curves->comp_points_str[0]);
748 } else if (!strcmp(cmd, "green") || !strcmp(cmd, "g")) {
749 av_freep(&curves->comp_points_str[1]);
750 } else if (!strcmp(cmd, "blue") || !strcmp(cmd, "b")) {
751 av_freep(&curves->comp_points_str[2]);
752 } else if (!strcmp(cmd, "master") || !strcmp(cmd, "m")) {
753 av_freep(&curves->comp_points_str[NB_COMP]);
754 }
755
756 ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
757 if (ret < 0)
758 return ret;
759
760 ret = curves_init(ctx);
761 if (ret < 0)
762 return ret;
763 return config_input(ctx->inputs[0]);
764 }
765
curves_uninit(AVFilterContext * ctx)766 static av_cold void curves_uninit(AVFilterContext *ctx)
767 {
768 int i;
769 CurvesContext *curves = ctx->priv;
770
771 for (i = 0; i < NB_COMP + 1; i++)
772 av_freep(&curves->graph[i]);
773 }
774
775 static const AVFilterPad curves_inputs[] = {
776 {
777 .name = "default",
778 .type = AVMEDIA_TYPE_VIDEO,
779 .filter_frame = filter_frame,
780 .config_props = config_input,
781 },
782 };
783
784 static const AVFilterPad curves_outputs[] = {
785 {
786 .name = "default",
787 .type = AVMEDIA_TYPE_VIDEO,
788 },
789 };
790
791 const AVFilter ff_vf_curves = {
792 .name = "curves",
793 .description = NULL_IF_CONFIG_SMALL("Adjust components curves."),
794 .priv_size = sizeof(CurvesContext),
795 .init = curves_init,
796 .uninit = curves_uninit,
797 FILTER_INPUTS(curves_inputs),
798 FILTER_OUTPUTS(curves_outputs),
799 FILTER_PIXFMTS(AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
800 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
801 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
802 AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
803 AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
804 AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
805 AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
806 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
807 AV_PIX_FMT_GBRP9,
808 AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
809 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12,
810 AV_PIX_FMT_GBRP14,
811 AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16),
812 .priv_class = &curves_class,
813 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
814 .process_command = process_command,
815 };
816