FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_atadenoise.c
Date: 2022-11-26 13:19:19
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Lines: 0 145 0.0%
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1 /*
2 * Copyright (c) 2015 Paul B Mahol
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 /**
22 * @file
23 * Adaptive Temporal Averaging Denoiser,
24 * based on paper "Video Denoising Based on Adaptive Temporal Averaging" by
25 * David Bartovčak and Miroslav Vrankić
26 */
27
28 #include "libavutil/imgutils.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/pixdesc.h"
31 #include "avfilter.h"
32
33 #define FF_BUFQUEUE_SIZE 129
34 #include "bufferqueue.h"
35
36 #include "atadenoise.h"
37 #include "formats.h"
38 #include "internal.h"
39 #include "video.h"
40
41 #define SIZE FF_BUFQUEUE_SIZE
42
43 typedef struct ATADenoiseContext {
44 const AVClass *class;
45
46 float fthra[4], fthrb[4];
47 float sigma[4];
48 int thra[4], thrb[4];
49 int algorithm;
50
51 int planes;
52 int nb_planes;
53 int planewidth[4];
54 int planeheight[4];
55 int linesizes[4];
56
57 struct FFBufQueue q;
58 void *data[4][SIZE];
59 int linesize[4][SIZE];
60 float weights[4][SIZE];
61 int size, mid, radius;
62 int available;
63
64 int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
65
66 ATADenoiseDSPContext dsp;
67 } ATADenoiseContext;
68
69 #define OFFSET(x) offsetof(ATADenoiseContext, x)
70 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
71 #define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
72
73 static const AVOption atadenoise_options[] = {
74 { "0a", "set threshold A for 1st plane", OFFSET(fthra[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0, 0.3, FLAGS },
75 { "0b", "set threshold B for 1st plane", OFFSET(fthrb[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.04}, 0, 5.0, FLAGS },
76 { "1a", "set threshold A for 2nd plane", OFFSET(fthra[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0, 0.3, FLAGS },
77 { "1b", "set threshold B for 2nd plane", OFFSET(fthrb[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.04}, 0, 5.0, FLAGS },
78 { "2a", "set threshold A for 3rd plane", OFFSET(fthra[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0, 0.3, FLAGS },
79 { "2b", "set threshold B for 3rd plane", OFFSET(fthrb[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.04}, 0, 5.0, FLAGS },
80 { "s", "set how many frames to use", OFFSET(size), AV_OPT_TYPE_INT, {.i64=9}, 5, SIZE, VF },
81 { "p", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=7}, 0, 15, FLAGS },
82 { "a", "set variant of algorithm", OFFSET(algorithm),AV_OPT_TYPE_INT, {.i64=PARALLEL}, 0, NB_ATAA-1, FLAGS, "a" },
83 { "p", "parallel", 0, AV_OPT_TYPE_CONST, {.i64=PARALLEL}, 0, 0, FLAGS, "a" },
84 { "s", "serial", 0, AV_OPT_TYPE_CONST, {.i64=SERIAL}, 0, 0, FLAGS, "a" },
85 { "0s", "set sigma for 1st plane", OFFSET(sigma[0]), AV_OPT_TYPE_FLOAT, {.dbl=INT16_MAX}, 0, INT16_MAX, FLAGS },
86 { "1s", "set sigma for 2nd plane", OFFSET(sigma[1]), AV_OPT_TYPE_FLOAT, {.dbl=INT16_MAX}, 0, INT16_MAX, FLAGS },
87 { "2s", "set sigma for 3rd plane", OFFSET(sigma[2]), AV_OPT_TYPE_FLOAT, {.dbl=INT16_MAX}, 0, INT16_MAX, FLAGS },
88 { NULL }
89 };
90
91 AVFILTER_DEFINE_CLASS(atadenoise);
92
93 static const enum AVPixelFormat pixel_fmts[] = {
94 AV_PIX_FMT_GRAY8,
95 AV_PIX_FMT_GRAY9,
96 AV_PIX_FMT_GRAY10,
97 AV_PIX_FMT_GRAY12,
98 AV_PIX_FMT_GRAY14,
99 AV_PIX_FMT_GRAY16,
100 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
101 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
102 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
103 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
104 AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
105 AV_PIX_FMT_YUVJ411P,
106 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
107 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
108 AV_PIX_FMT_YUV440P10,
109 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
110 AV_PIX_FMT_YUV440P12,
111 AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
112 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
113 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
114 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
115 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
116 AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
117 AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
118 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
119 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
120 AV_PIX_FMT_NONE
121 };
122
123 static av_cold int init(AVFilterContext *ctx)
124 {
125 ATADenoiseContext *s = ctx->priv;
126
127 if (!(s->size & 1)) {
128 av_log(ctx, AV_LOG_WARNING, "size %d is invalid. Must be an odd value, setting it to %d.\n", s->size, s->size|1);
129 s->size |= 1;
130 }
131 s->radius = s->size / 2;
132 s->mid = s->radius;
133
134 return 0;
135 }
136
137 typedef struct ThreadData {
138 AVFrame *in, *out;
139 } ThreadData;
140
141 #define WFILTER_ROW(type, name) \
142 static void fweight_row##name(const uint8_t *ssrc, uint8_t *ddst, \
143 const uint8_t *ssrcf[SIZE], \
144 int w, int mid, int size, \
145 int thra, int thrb, const float *weights) \
146 { \
147 const type *src = (const type *)ssrc; \
148 const type **srcf = (const type **)ssrcf; \
149 type *dst = (type *)ddst; \
150 \
151 for (int x = 0; x < w; x++) { \
152 const int srcx = src[x]; \
153 unsigned lsumdiff = 0, rsumdiff = 0; \
154 unsigned ldiff, rdiff; \
155 float sum = srcx; \
156 float wsum = 1.f; \
157 int srcjx, srcix; \
158 \
159 for (int j = mid - 1, i = mid + 1; j >= 0 && i < size; j--, i++) { \
160 srcjx = srcf[j][x]; \
161 \
162 ldiff = FFABS(srcx - srcjx); \
163 lsumdiff += ldiff; \
164 if (ldiff > thra || \
165 lsumdiff > thrb) \
166 break; \
167 sum += srcjx * weights[j]; \
168 wsum += weights[j]; \
169 \
170 srcix = srcf[i][x]; \
171 \
172 rdiff = FFABS(srcx - srcix); \
173 rsumdiff += rdiff; \
174 if (rdiff > thra || \
175 rsumdiff > thrb) \
176 break; \
177 sum += srcix * weights[i]; \
178 wsum += weights[i]; \
179 } \
180 \
181 dst[x] = lrintf(sum / wsum); \
182 } \
183 }
184
185 WFILTER_ROW(uint8_t, 8)
186 WFILTER_ROW(uint16_t, 16)
187
188 #define WFILTER_ROW_SERIAL(type, name) \
189 static void fweight_row##name##_serial(const uint8_t *ssrc, uint8_t *ddst, \
190 const uint8_t *ssrcf[SIZE], \
191 int w, int mid, int size, \
192 int thra, int thrb, \
193 const float *weights) \
194 { \
195 const type *src = (const type *)ssrc; \
196 const type **srcf = (const type **)ssrcf; \
197 type *dst = (type *)ddst; \
198 \
199 for (int x = 0; x < w; x++) { \
200 const int srcx = src[x]; \
201 unsigned lsumdiff = 0, rsumdiff = 0; \
202 unsigned ldiff, rdiff; \
203 float sum = srcx; \
204 float wsum = 1.f; \
205 int srcjx, srcix; \
206 \
207 for (int j = mid - 1; j >= 0; j--) { \
208 srcjx = srcf[j][x]; \
209 \
210 ldiff = FFABS(srcx - srcjx); \
211 lsumdiff += ldiff; \
212 if (ldiff > thra || \
213 lsumdiff > thrb) \
214 break; \
215 sum += srcjx * weights[j]; \
216 wsum += weights[j]; \
217 } \
218 \
219 for (int i = mid + 1; i < size; i++) { \
220 srcix = srcf[i][x]; \
221 \
222 rdiff = FFABS(srcx - srcix); \
223 rsumdiff += rdiff; \
224 if (rdiff > thra || \
225 rsumdiff > thrb) \
226 break; \
227 sum += srcix * weights[i]; \
228 wsum += weights[i]; \
229 } \
230 \
231 dst[x] = lrintf(sum / wsum); \
232 } \
233 }
234
235 WFILTER_ROW_SERIAL(uint8_t, 8)
236 WFILTER_ROW_SERIAL(uint16_t, 16)
237
238 #define FILTER_ROW(type, name) \
239 static void filter_row##name(const uint8_t *ssrc, uint8_t *ddst, \
240 const uint8_t *ssrcf[SIZE], \
241 int w, int mid, int size, \
242 int thra, int thrb, const float *weights) \
243 { \
244 const type *src = (const type *)ssrc; \
245 const type **srcf = (const type **)ssrcf; \
246 type *dst = (type *)ddst; \
247 \
248 for (int x = 0; x < w; x++) { \
249 const int srcx = src[x]; \
250 unsigned lsumdiff = 0, rsumdiff = 0; \
251 unsigned ldiff, rdiff; \
252 unsigned sum = srcx; \
253 int l = 0, r = 0; \
254 int srcjx, srcix; \
255 \
256 for (int j = mid - 1, i = mid + 1; j >= 0 && i < size; j--, i++) { \
257 srcjx = srcf[j][x]; \
258 \
259 ldiff = FFABS(srcx - srcjx); \
260 lsumdiff += ldiff; \
261 if (ldiff > thra || \
262 lsumdiff > thrb) \
263 break; \
264 l++; \
265 sum += srcjx; \
266 \
267 srcix = srcf[i][x]; \
268 \
269 rdiff = FFABS(srcx - srcix); \
270 rsumdiff += rdiff; \
271 if (rdiff > thra || \
272 rsumdiff > thrb) \
273 break; \
274 r++; \
275 sum += srcix; \
276 } \
277 \
278 dst[x] = (sum + ((r + l + 1) >> 1)) / (r + l + 1); \
279 } \
280 }
281
282 FILTER_ROW(uint8_t, 8)
283 FILTER_ROW(uint16_t, 16)
284
285 #define FILTER_ROW_SERIAL(type, name) \
286 static void filter_row##name##_serial(const uint8_t *ssrc, uint8_t *ddst, \
287 const uint8_t *ssrcf[SIZE], \
288 int w, int mid, int size, \
289 int thra, int thrb, \
290 const float *weights) \
291 { \
292 const type *src = (const type *)ssrc; \
293 const type **srcf = (const type **)ssrcf; \
294 type *dst = (type *)ddst; \
295 \
296 for (int x = 0; x < w; x++) { \
297 const int srcx = src[x]; \
298 unsigned lsumdiff = 0, rsumdiff = 0; \
299 unsigned ldiff, rdiff; \
300 unsigned sum = srcx; \
301 int l = 0, r = 0; \
302 int srcjx, srcix; \
303 \
304 for (int j = mid - 1; j >= 0; j--) { \
305 srcjx = srcf[j][x]; \
306 \
307 ldiff = FFABS(srcx - srcjx); \
308 lsumdiff += ldiff; \
309 if (ldiff > thra || \
310 lsumdiff > thrb) \
311 break; \
312 l++; \
313 sum += srcjx; \
314 } \
315 \
316 for (int i = mid + 1; i < size; i++) { \
317 srcix = srcf[i][x]; \
318 \
319 rdiff = FFABS(srcx - srcix); \
320 rsumdiff += rdiff; \
321 if (rdiff > thra || \
322 rsumdiff > thrb) \
323 break; \
324 r++; \
325 sum += srcix; \
326 } \
327 \
328 dst[x] = (sum + ((r + l + 1) >> 1)) / (r + l + 1); \
329 } \
330 }
331
332 FILTER_ROW_SERIAL(uint8_t, 8)
333 FILTER_ROW_SERIAL(uint16_t, 16)
334
335 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
336 {
337 ATADenoiseContext *s = ctx->priv;
338 ThreadData *td = arg;
339 AVFrame *in = td->in;
340 AVFrame *out = td->out;
341 const int size = s->size;
342 const int mid = s->mid;
343 int p, y, i;
344
345 for (p = 0; p < s->nb_planes; p++) {
346 const float *weights = s->weights[p];
347 const int h = s->planeheight[p];
348 const int w = s->planewidth[p];
349 const int slice_start = (h * jobnr) / nb_jobs;
350 const int slice_end = (h * (jobnr+1)) / nb_jobs;
351 const uint8_t *src = in->data[p] + slice_start * in->linesize[p];
352 uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
353 const int thra = s->thra[p];
354 const int thrb = s->thrb[p];
355 const uint8_t **data = (const uint8_t **)s->data[p];
356 const int *linesize = (const int *)s->linesize[p];
357 const uint8_t *srcf[SIZE];
358
359 if (!((1 << p) & s->planes)) {
360 av_image_copy_plane(dst, out->linesize[p], src, in->linesize[p],
361 s->linesizes[p], slice_end - slice_start);
362 continue;
363 }
364
365 for (i = 0; i < size; i++)
366 srcf[i] = data[i] + slice_start * linesize[i];
367
368 for (y = slice_start; y < slice_end; y++) {
369 s->dsp.filter_row[p](src, dst, srcf, w, mid, size, thra, thrb, weights);
370
371 dst += out->linesize[p];
372 src += in->linesize[p];
373
374 for (i = 0; i < size; i++)
375 srcf[i] += linesize[i];
376 }
377 }
378
379 return 0;
380 }
381
382 static int config_input(AVFilterLink *inlink)
383 {
384 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
385 AVFilterContext *ctx = inlink->dst;
386 ATADenoiseContext *s = ctx->priv;
387 int depth, ret;
388
389 s->nb_planes = desc->nb_components;
390
391 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
392 s->planeheight[0] = s->planeheight[3] = inlink->h;
393 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
394 s->planewidth[0] = s->planewidth[3] = inlink->w;
395
396 depth = desc->comp[0].depth;
397 s->filter_slice = filter_slice;
398
399 if ((ret = av_image_fill_linesizes(s->linesizes, inlink->format, inlink->w)) < 0)
400 return ret;
401
402 for (int p = 0; p < s->nb_planes; p++) {
403 if (depth == 8 && s->sigma[p] == INT16_MAX)
404 s->dsp.filter_row[p] = s->algorithm == PARALLEL ? filter_row8 : filter_row8_serial;
405 else if (s->sigma[p] == INT16_MAX)
406 s->dsp.filter_row[p] = s->algorithm == PARALLEL ? filter_row16 : filter_row16_serial;
407 else if (depth == 8 && s->sigma[p] < INT16_MAX)
408 s->dsp.filter_row[p] = s->algorithm == PARALLEL ? fweight_row8 : fweight_row8_serial;
409 else if (s->sigma[p] < INT16_MAX)
410 s->dsp.filter_row[p] = s->algorithm == PARALLEL ? fweight_row16 : fweight_row16_serial;
411 }
412
413 s->thra[0] = s->fthra[0] * (1 << depth) - 1;
414 s->thra[1] = s->fthra[1] * (1 << depth) - 1;
415 s->thra[2] = s->fthra[2] * (1 << depth) - 1;
416 s->thrb[0] = s->fthrb[0] * (1 << depth) - 1;
417 s->thrb[1] = s->fthrb[1] * (1 << depth) - 1;
418 s->thrb[2] = s->fthrb[2] * (1 << depth) - 1;
419
420 for (int p = 0; p < s->nb_planes; p++) {
421 float sigma = s->radius * s->sigma[p];
422
423 s->weights[p][s->radius] = 1.f;
424 for (int n = 1; n <= s->radius; n++) {
425 s->weights[p][s->radius + n] =
426 s->weights[p][s->radius - n] = expf(-0.5 * (n + 1) * (n + 1) / (sigma * sigma));
427 }
428 }
429
430 #if ARCH_X86
431 ff_atadenoise_init_x86(&s->dsp, depth, s->algorithm, s->sigma);
432 #endif
433
434 return 0;
435 }
436
437 static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
438 {
439 AVFilterContext *ctx = inlink->dst;
440 AVFilterLink *outlink = ctx->outputs[0];
441 ATADenoiseContext *s = ctx->priv;
442 AVFrame *out, *in;
443 int i;
444
445 if (s->q.available != s->size) {
446 if (s->q.available < s->mid) {
447 for (i = 0; i < s->mid; i++) {
448 out = av_frame_clone(buf);
449 if (!out) {
450 av_frame_free(&buf);
451 return AVERROR(ENOMEM);
452 }
453 ff_bufqueue_add(ctx, &s->q, out);
454 }
455 }
456 if (s->q.available < s->size) {
457 ff_bufqueue_add(ctx, &s->q, buf);
458 s->available++;
459 }
460 return 0;
461 }
462
463 in = ff_bufqueue_peek(&s->q, s->mid);
464
465 if (!ctx->is_disabled) {
466 ThreadData td;
467
468 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
469 if (!out) {
470 av_frame_free(&buf);
471 return AVERROR(ENOMEM);
472 }
473
474 for (i = 0; i < s->size; i++) {
475 AVFrame *frame = ff_bufqueue_peek(&s->q, i);
476
477 s->data[0][i] = frame->data[0];
478 s->data[1][i] = frame->data[1];
479 s->data[2][i] = frame->data[2];
480 s->linesize[0][i] = frame->linesize[0];
481 s->linesize[1][i] = frame->linesize[1];
482 s->linesize[2][i] = frame->linesize[2];
483 }
484
485 td.in = in; td.out = out;
486 ff_filter_execute(ctx, s->filter_slice, &td, NULL,
487 FFMIN3(s->planeheight[1],
488 s->planeheight[2],
489 ff_filter_get_nb_threads(ctx)));
490 av_frame_copy_props(out, in);
491 } else {
492 out = av_frame_clone(in);
493 if (!out) {
494 av_frame_free(&buf);
495 return AVERROR(ENOMEM);
496 }
497 }
498
499 in = ff_bufqueue_get(&s->q);
500 av_frame_free(&in);
501 ff_bufqueue_add(ctx, &s->q, buf);
502
503 return ff_filter_frame(outlink, out);
504 }
505
506 static int request_frame(AVFilterLink *outlink)
507 {
508 AVFilterContext *ctx = outlink->src;
509 ATADenoiseContext *s = ctx->priv;
510 int ret = 0;
511
512 ret = ff_request_frame(ctx->inputs[0]);
513
514 if (ret == AVERROR_EOF && !ctx->is_disabled && s->available) {
515 AVFrame *buf = av_frame_clone(ff_bufqueue_peek(&s->q, s->available));
516 if (!buf)
517 return AVERROR(ENOMEM);
518
519 ret = filter_frame(ctx->inputs[0], buf);
520 s->available--;
521 }
522
523 return ret;
524 }
525
526 static av_cold void uninit(AVFilterContext *ctx)
527 {
528 ATADenoiseContext *s = ctx->priv;
529
530 ff_bufqueue_discard_all(&s->q);
531 }
532
533 static int process_command(AVFilterContext *ctx,
534 const char *cmd,
535 const char *arg,
536 char *res,
537 int res_len,
538 int flags)
539 {
540 int ret = ff_filter_process_command(ctx, cmd, arg, res, res_len, flags);
541
542 if (ret < 0)
543 return ret;
544
545 return config_input(ctx->inputs[0]);
546 }
547
548 static const AVFilterPad inputs[] = {
549 {
550 .name = "default",
551 .type = AVMEDIA_TYPE_VIDEO,
552 .filter_frame = filter_frame,
553 .config_props = config_input,
554 },
555 };
556
557 static const AVFilterPad outputs[] = {
558 {
559 .name = "default",
560 .type = AVMEDIA_TYPE_VIDEO,
561 .request_frame = request_frame,
562 },
563 };
564
565 const AVFilter ff_vf_atadenoise = {
566 .name = "atadenoise",
567 .description = NULL_IF_CONFIG_SMALL("Apply an Adaptive Temporal Averaging Denoiser."),
568 .priv_size = sizeof(ATADenoiseContext),
569 .priv_class = &atadenoise_class,
570 .init = init,
571 .uninit = uninit,
572 FILTER_INPUTS(inputs),
573 FILTER_OUTPUTS(outputs),
574 FILTER_PIXFMTS_ARRAY(pixel_fmts),
575 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
576 .process_command = process_command,
577 };
578