1 /*
2 * Copyright (c) 2017 Ronald S. Bultje <rsbultje@gmail.com>
3 * Copyright (c) 2017 Ashish Pratap Singh <ashk43712@gmail.com>
4 * Copyright (c) 2021 Paul B Mahol
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * Calculate VIF between two input videos.
26 */
27
28 #include <float.h>
29
30 #include "libavutil/avstring.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/pixdesc.h"
33 #include "avfilter.h"
34 #include "framesync.h"
35 #include "drawutils.h"
36 #include "formats.h"
37 #include "internal.h"
38 #include "vif.h"
39 #include "video.h"
40
41 typedef struct VIFContext {
42 const AVClass *class;
43 FFFrameSync fs;
44 const AVPixFmtDescriptor *desc;
45 int width;
46 int height;
47 int nb_threads;
48 float factor;
49 float *data_buf[13];
50 float **temp;
51 float *ref_data;
52 float *main_data;
53 double vif_sum[4];
54 double vif_min[4];
55 double vif_max[4];
56 uint64_t nb_frames;
57 } VIFContext;
58
59 #define OFFSET(x) offsetof(VIFContext, x)
60
61 static const AVOption vif_options[] = {
62 { NULL }
63 };
64
65 AVFILTER_DEFINE_CLASS(vif);
66
67 static const uint8_t vif_filter1d_width1[4] = { 17, 9, 5, 3 };
68
69 static const float vif_filter1d_table[4][17] =
70 {
71 {
72 0.00745626912, 0.0142655009, 0.0250313189, 0.0402820669, 0.0594526194,
73 0.0804751068, 0.0999041125, 0.113746084, 0.118773937, 0.113746084,
74 0.0999041125, 0.0804751068, 0.0594526194, 0.0402820669, 0.0250313189,
75 0.0142655009, 0.00745626912
76 },
77 {
78 0.0189780835, 0.0558981746, 0.120920904, 0.192116052, 0.224173605,
79 0.192116052, 0.120920904, 0.0558981746, 0.0189780835
80 },
81 {
82 0.054488685, 0.244201347, 0.402619958, 0.244201347, 0.054488685
83 },
84 {
85 0.166378498, 0.667243004, 0.166378498
86 }
87 };
88
89 typedef struct ThreadData {
90 const float *filter;
91 const float *src;
92 float *dst;
93 int w, h;
94 int src_stride;
95 int dst_stride;
96 int filter_width;
97 float **temp;
98 } ThreadData;
99
vif_dec2(const float * src,float * dst,int w,int h,int src_stride,int dst_stride)100 static void vif_dec2(const float *src, float *dst, int w, int h,
101 int src_stride, int dst_stride)
102 {
103 const int dst_px_stride = dst_stride / 2;
104
105 for (int i = 0; i < h / 2; i++) {
106 for (int j = 0; j < w / 2; j++)
107 dst[i * dst_px_stride + j] = src[(i * 2) * src_stride + (j * 2)];
108 }
109 }
110
vif_statistic(const float * mu1_sq,const float * mu2_sq,const float * mu1_mu2,const float * xx_filt,const float * yy_filt,const float * xy_filt,float * num,float * den,int w,int h)111 static void vif_statistic(const float *mu1_sq, const float *mu2_sq,
112 const float *mu1_mu2, const float *xx_filt,
113 const float *yy_filt, const float *xy_filt,
114 float *num, float *den, int w, int h)
115 {
116 static const float sigma_nsq = 2;
117 float mu1_sq_val, mu2_sq_val, mu1_mu2_val, xx_filt_val, yy_filt_val, xy_filt_val;
118 float sigma1_sq, sigma2_sq, sigma12, g, sv_sq, eps = 1.0e-10f;
119 float gain_limit = 100.f;
120 float num_val, den_val;
121 float accum_num = 0.0f;
122 float accum_den = 0.0f;
123
124 for (int i = 0; i < h; i++) {
125 float accum_inner_num = 0.f;
126 float accum_inner_den = 0.f;
127
128 for (int j = 0; j < w; j++) {
129 mu1_sq_val = mu1_sq[i * w + j];
130 mu2_sq_val = mu2_sq[i * w + j];
131 mu1_mu2_val = mu1_mu2[i * w + j];
132 xx_filt_val = xx_filt[i * w + j];
133 yy_filt_val = yy_filt[i * w + j];
134 xy_filt_val = xy_filt[i * w + j];
135
136 sigma1_sq = xx_filt_val - mu1_sq_val;
137 sigma2_sq = yy_filt_val - mu2_sq_val;
138 sigma12 = xy_filt_val - mu1_mu2_val;
139
140 sigma1_sq = FFMAX(sigma1_sq, 0.0f);
141 sigma2_sq = FFMAX(sigma2_sq, 0.0f);
142 sigma12 = FFMAX(sigma12, 0.0f);
143
144 g = sigma12 / (sigma1_sq + eps);
145 sv_sq = sigma2_sq - g * sigma12;
146
147 if (sigma1_sq < eps) {
148 g = 0.0f;
149 sv_sq = sigma2_sq;
150 sigma1_sq = 0.0f;
151 }
152
153 if (sigma2_sq < eps) {
154 g = 0.0f;
155 sv_sq = 0.0f;
156 }
157
158 if (g < 0.0f) {
159 sv_sq = sigma2_sq;
160 g = 0.0f;
161 }
162 sv_sq = FFMAX(sv_sq, eps);
163
164 g = FFMIN(g, gain_limit);
165
166 num_val = log2f(1.0f + g * g * sigma1_sq / (sv_sq + sigma_nsq));
167 den_val = log2f(1.0f + sigma1_sq / sigma_nsq);
168
169 if (isnan(den_val))
170 num_val = den_val = 1.f;
171
172 accum_inner_num += num_val;
173 accum_inner_den += den_val;
174 }
175
176 accum_num += accum_inner_num;
177 accum_den += accum_inner_den;
178 }
179
180 num[0] = accum_num;
181 den[0] = accum_den;
182 }
183
vif_xx_yy_xy(const float * x,const float * y,float * xx,float * yy,float * xy,int w,int h)184 static void vif_xx_yy_xy(const float *x, const float *y, float *xx, float *yy,
185 float *xy, int w, int h)
186 {
187 for (int i = 0; i < h; i++) {
188 for (int j = 0; j < w; j++) {
189 float xval = x[j];
190 float yval = y[j];
191 float xxval = xval * xval;
192 float yyval = yval * yval;
193 float xyval = xval * yval;
194
195 xx[j] = xxval;
196 yy[j] = yyval;
197 xy[j] = xyval;
198 }
199
200 xx += w;
201 yy += w;
202 xy += w;
203 x += w;
204 y += w;
205 }
206 }
207
vif_filter1d(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)208 static int vif_filter1d(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
209 {
210 ThreadData *td = arg;
211 const float *filter = td->filter;
212 const float *src = td->src;
213 float *dst = td->dst;
214 int w = td->w;
215 int h = td->h;
216 int src_stride = td->src_stride;
217 int dst_stride = td->dst_stride;
218 int filt_w = td->filter_width;
219 float *temp = td->temp[jobnr];
220 const int slice_start = (h * jobnr) / nb_jobs;
221 const int slice_end = (h * (jobnr+1)) / nb_jobs;
222
223 for (int i = slice_start; i < slice_end; i++) {
224 /** Vertical pass. */
225 for (int j = 0; j < w; j++) {
226 float sum = 0.f;
227
228 if (i >= filt_w / 2 && i < h - filt_w / 2 - 1) {
229 for (int filt_i = 0; filt_i < filt_w; filt_i++) {
230 const float filt_coeff = filter[filt_i];
231 float img_coeff;
232 int ii = i - filt_w / 2 + filt_i;
233
234 img_coeff = src[ii * src_stride + j];
235 sum += filt_coeff * img_coeff;
236 }
237 } else {
238 for (int filt_i = 0; filt_i < filt_w; filt_i++) {
239 const float filt_coeff = filter[filt_i];
240 int ii = i - filt_w / 2 + filt_i;
241 float img_coeff;
242
243 ii = ii < 0 ? -ii : (ii >= h ? 2 * h - ii - 1 : ii);
244
245 img_coeff = src[ii * src_stride + j];
246 sum += filt_coeff * img_coeff;
247 }
248 }
249
250 temp[j] = sum;
251 }
252
253 /** Horizontal pass. */
254 for (int j = 0; j < w; j++) {
255 float sum = 0.f;
256
257 if (j >= filt_w / 2 && j < w - filt_w / 2 - 1) {
258 for (int filt_j = 0; filt_j < filt_w; filt_j++) {
259 const float filt_coeff = filter[filt_j];
260 int jj = j - filt_w / 2 + filt_j;
261 float img_coeff;
262
263 img_coeff = temp[jj];
264 sum += filt_coeff * img_coeff;
265 }
266 } else {
267 for (int filt_j = 0; filt_j < filt_w; filt_j++) {
268 const float filt_coeff = filter[filt_j];
269 int jj = j - filt_w / 2 + filt_j;
270 float img_coeff;
271
272 jj = jj < 0 ? -jj : (jj >= w ? 2 * w - jj - 1 : jj);
273
274 img_coeff = temp[jj];
275 sum += filt_coeff * img_coeff;
276 }
277 }
278
279 dst[i * dst_stride + j] = sum;
280 }
281 }
282
283 return 0;
284 }
285
ff_compute_vif2(AVFilterContext * ctx,const float * ref,const float * main,int w,int h,int ref_stride,int main_stride,float * score,float * data_buf[14],float ** temp,int gnb_threads)286 int ff_compute_vif2(AVFilterContext *ctx,
287 const float *ref, const float *main, int w, int h,
288 int ref_stride, int main_stride, float *score,
289 float *data_buf[14], float **temp,
290 int gnb_threads)
291 {
292 ThreadData td;
293 float *ref_scale = data_buf[0];
294 float *main_scale = data_buf[1];
295 float *ref_sq = data_buf[2];
296 float *main_sq = data_buf[3];
297 float *ref_main = data_buf[4];
298 float *mu1 = data_buf[5];
299 float *mu2 = data_buf[6];
300 float *mu1_sq = data_buf[7];
301 float *mu2_sq = data_buf[8];
302 float *mu1_mu2 = data_buf[9];
303 float *ref_sq_filt = data_buf[10];
304 float *main_sq_filt = data_buf[11];
305 float *ref_main_filt = data_buf[12];
306
307 float *curr_ref_scale = (float *)ref;
308 float *curr_main_scale = (float *)main;
309 int curr_ref_stride = ref_stride;
310 int curr_main_stride = main_stride;
311
312 float num = 0.f;
313 float den = 0.f;
314
315 for (int scale = 0; scale < 4; scale++) {
316 const float *filter = vif_filter1d_table[scale];
317 int filter_width = vif_filter1d_width1[scale];
318 const int nb_threads = FFMIN(h, gnb_threads);
319 int buf_valid_w = w;
320 int buf_valid_h = h;
321
322 td.filter = filter;
323 td.filter_width = filter_width;
324
325 if (scale > 0) {
326 td.src = curr_ref_scale;
327 td.dst = mu1;
328 td.w = w;
329 td.h = h;
330 td.src_stride = curr_ref_stride;
331 td.dst_stride = w;
332 td.temp = temp;
333 ctx->internal->execute(ctx, vif_filter1d, &td, NULL, nb_threads);
334
335 td.src = curr_main_scale;
336 td.dst = mu2;
337 td.src_stride = curr_main_stride;
338 ctx->internal->execute(ctx, vif_filter1d, &td, NULL, nb_threads);
339
340 vif_dec2(mu1, ref_scale, buf_valid_w, buf_valid_h, w, w);
341 vif_dec2(mu2, main_scale, buf_valid_w, buf_valid_h, w, w);
342
343 w = buf_valid_w / 2;
344 h = buf_valid_h / 2;
345
346 buf_valid_w = w;
347 buf_valid_h = h;
348
349 curr_ref_scale = ref_scale;
350 curr_main_scale = main_scale;
351
352 curr_ref_stride = w;
353 curr_main_stride = w;
354 }
355
356 td.src = curr_ref_scale;
357 td.dst = mu1;
358 td.w = w;
359 td.h = h;
360 td.src_stride = curr_ref_stride;
361 td.dst_stride = w;
362 td.temp = temp;
363 ctx->internal->execute(ctx, vif_filter1d, &td, NULL, nb_threads);
364
365 td.src = curr_main_scale;
366 td.dst = mu2;
367 td.src_stride = curr_main_stride;
368 ctx->internal->execute(ctx, vif_filter1d, &td, NULL, nb_threads);
369
370 vif_xx_yy_xy(mu1, mu2, mu1_sq, mu2_sq, mu1_mu2, w, h);
371
372 vif_xx_yy_xy(curr_ref_scale, curr_main_scale, ref_sq, main_sq, ref_main, w, h);
373
374 td.src = ref_sq;
375 td.dst = ref_sq_filt;
376 td.src_stride = w;
377 ctx->internal->execute(ctx, vif_filter1d, &td, NULL, nb_threads);
378
379 td.src = main_sq;
380 td.dst = main_sq_filt;
381 td.src_stride = w;
382 ctx->internal->execute(ctx, vif_filter1d, &td, NULL, nb_threads);
383
384 td.src = ref_main;
385 td.dst = ref_main_filt;
386 ctx->internal->execute(ctx, vif_filter1d, &td, NULL, nb_threads);
387
388 vif_statistic(mu1_sq, mu2_sq, mu1_mu2, ref_sq_filt, main_sq_filt,
389 ref_main_filt, &num, &den, w, h);
390
391 score[scale] = den <= FLT_EPSILON ? 1.f : num / den;
392 }
393
394 return 0;
395 }
396
397 #define offset_fn(type, bits) \
398 static void offset_##bits##bit(VIFContext *s, \
399 const AVFrame *ref, \
400 AVFrame *main, int stride)\
401 { \
402 int w = s->width; \
403 int h = s->height; \
404 \
405 int ref_stride = ref->linesize[0]; \
406 int main_stride = main->linesize[0]; \
407 \
408 const type *ref_ptr = (const type *) ref->data[0]; \
409 const type *main_ptr = (const type *) main->data[0]; \
410 \
411 const float factor = s->factor; \
412 \
413 float *ref_ptr_data = s->ref_data; \
414 float *main_ptr_data = s->main_data; \
415 \
416 for (int i = 0; i < h; i++) { \
417 for (int j = 0; j < w; j++) { \
418 ref_ptr_data[j] = ref_ptr[j] * factor - 128.f; \
419 main_ptr_data[j] = main_ptr[j] * factor - 128.f; \
420 } \
421 ref_ptr += ref_stride / sizeof(type); \
422 ref_ptr_data += w; \
423 main_ptr += main_stride / sizeof(type); \
424 main_ptr_data += w; \
425 } \
426 }
427
428 offset_fn(uint8_t, 8)
429 offset_fn(uint16_t, 16)
430
set_meta(AVDictionary ** metadata,const char * key,float d)431 static void set_meta(AVDictionary **metadata, const char *key, float d)
432 {
433 char value[257];
434 snprintf(value, sizeof(value), "%f", d);
435 av_dict_set(metadata, key, value, 0);
436 }
437
do_vif(AVFilterContext * ctx,AVFrame * main,const AVFrame * ref)438 static AVFrame *do_vif(AVFilterContext *ctx, AVFrame *main, const AVFrame *ref)
439 {
440 VIFContext *s = ctx->priv;
441 AVDictionary **metadata = &main->metadata;
442 float score[4];
443
444 s->factor = 1.f / (1 << (s->desc->comp[0].depth - 8));
445 if (s->desc->comp[0].depth <= 8) {
446 offset_8bit(s, ref, main, s->width);
447 } else {
448 offset_16bit(s, ref, main, s->width);
449 }
450
451 ff_compute_vif2(ctx,
452 s->ref_data, s->main_data, s->width,
453 s->height, s->width, s->width,
454 score, s->data_buf, s->temp,
455 s->nb_threads);
456
457 set_meta(metadata, "lavfi.vif.scale.0", score[0]);
458 set_meta(metadata, "lavfi.vif.scale.1", score[1]);
459 set_meta(metadata, "lavfi.vif.scale.2", score[2]);
460 set_meta(metadata, "lavfi.vif.scale.3", score[3]);
461
462 for (int i = 0; i < 4; i++) {
463 s->vif_min[i] = FFMIN(s->vif_min[i], score[i]);
464 s->vif_max[i] = FFMAX(s->vif_max[i], score[i]);
465 s->vif_sum[i] += score[i];
466 }
467
468 s->nb_frames++;
469
470 return main;
471 }
472
query_formats(AVFilterContext * ctx)473 static int query_formats(AVFilterContext *ctx)
474 {
475 static const enum AVPixelFormat pix_fmts[] = {
476 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10,
477 AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
478 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
479 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
480 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
481 AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
482 #define PF(suf) AV_PIX_FMT_YUV420##suf, AV_PIX_FMT_YUV422##suf, AV_PIX_FMT_YUV444##suf
483 PF(P9), PF(P10), PF(P12), PF(P14), PF(P16),
484 AV_PIX_FMT_NONE
485 };
486
487 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
488 if (!fmts_list)
489 return AVERROR(ENOMEM);
490 return ff_set_common_formats(ctx, fmts_list);
491 }
492
config_input_ref(AVFilterLink * inlink)493 static int config_input_ref(AVFilterLink *inlink)
494 {
495 AVFilterContext *ctx = inlink->dst;
496 VIFContext *s = ctx->priv;
497
498 if (ctx->inputs[0]->w != ctx->inputs[1]->w ||
499 ctx->inputs[0]->h != ctx->inputs[1]->h) {
500 av_log(ctx, AV_LOG_ERROR, "Width and height of input videos must be same.\n");
501 return AVERROR(EINVAL);
502 }
503 if (ctx->inputs[0]->format != ctx->inputs[1]->format) {
504 av_log(ctx, AV_LOG_ERROR, "Inputs must be of same pixel format.\n");
505 return AVERROR(EINVAL);
506 }
507
508 s->desc = av_pix_fmt_desc_get(inlink->format);
509 s->width = ctx->inputs[0]->w;
510 s->height = ctx->inputs[0]->h;
511 s->nb_threads = ff_filter_get_nb_threads(ctx);
512
513 for (int i = 0; i < 4; i++) {
514 s->vif_min[i] = DBL_MAX;
515 s->vif_max[i] = -DBL_MAX;
516 }
517
518 for (int i = 0; i < 13; i++) {
519 if (!(s->data_buf[i] = av_calloc(s->width, s->height * sizeof(float))))
520 return AVERROR(ENOMEM);
521 }
522
523 if (!(s->ref_data = av_calloc(s->width, s->height * sizeof(float))))
524 return AVERROR(ENOMEM);
525
526 if (!(s->main_data = av_calloc(s->width, s->height * sizeof(float))))
527 return AVERROR(ENOMEM);
528
529 if (!(s->temp = av_calloc(s->nb_threads, sizeof(s->temp[0]))))
530 return AVERROR(ENOMEM);
531
532 for (int i = 0; i < s->nb_threads; i++) {
533 if (!(s->temp[i] = av_calloc(s->width, sizeof(float))))
534 return AVERROR(ENOMEM);
535 }
536
537 return 0;
538 }
539
process_frame(FFFrameSync * fs)540 static int process_frame(FFFrameSync *fs)
541 {
542 AVFilterContext *ctx = fs->parent;
543 VIFContext *s = fs->opaque;
544 AVFilterLink *outlink = ctx->outputs[0];
545 AVFrame *out_frame, *main_frame = NULL, *ref_frame = NULL;
546 int ret;
547
548 ret = ff_framesync_dualinput_get(fs, &main_frame, &ref_frame);
549 if (ret < 0)
550 return ret;
551
552 if (ctx->is_disabled || !ref_frame) {
553 out_frame = main_frame;
554 } else {
555 out_frame = do_vif(ctx, main_frame, ref_frame);
556 }
557
558 out_frame->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
559
560 return ff_filter_frame(outlink, out_frame);
561 }
562
563
config_output(AVFilterLink * outlink)564 static int config_output(AVFilterLink *outlink)
565 {
566 AVFilterContext *ctx = outlink->src;
567 VIFContext *s = ctx->priv;
568 AVFilterLink *mainlink = ctx->inputs[0];
569 FFFrameSyncIn *in;
570 int ret;
571
572 outlink->w = mainlink->w;
573 outlink->h = mainlink->h;
574 outlink->time_base = mainlink->time_base;
575 outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio;
576 outlink->frame_rate = mainlink->frame_rate;
577 if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
578 return ret;
579
580 in = s->fs.in;
581 in[0].time_base = mainlink->time_base;
582 in[1].time_base = ctx->inputs[1]->time_base;
583 in[0].sync = 2;
584 in[0].before = EXT_STOP;
585 in[0].after = EXT_STOP;
586 in[1].sync = 1;
587 in[1].before = EXT_STOP;
588 in[1].after = EXT_STOP;
589 s->fs.opaque = s;
590 s->fs.on_event = process_frame;
591
592 return ff_framesync_configure(&s->fs);
593 }
594
activate(AVFilterContext * ctx)595 static int activate(AVFilterContext *ctx)
596 {
597 VIFContext *s = ctx->priv;
598 return ff_framesync_activate(&s->fs);
599 }
600
uninit(AVFilterContext * ctx)601 static av_cold void uninit(AVFilterContext *ctx)
602 {
603 VIFContext *s = ctx->priv;
604
605 if (s->nb_frames > 0) {
606 for (int i = 0; i < 4; i++)
607 av_log(ctx, AV_LOG_INFO, "VIF scale=%d average:%f min:%f: max:%f\n",
608 i, s->vif_sum[i] / s->nb_frames, s->vif_min[i], s->vif_max[i]);
609 }
610
611 for (int i = 0; i < 13; i++)
612 av_freep(&s->data_buf[i]);
613
614 av_freep(&s->ref_data);
615 av_freep(&s->main_data);
616
617 for (int i = 0; i < s->nb_threads && s->temp; i++)
618 av_freep(&s->temp[i]);
619
620 av_freep(&s->temp);
621
622 ff_framesync_uninit(&s->fs);
623 }
624
625 static const AVFilterPad vif_inputs[] = {
626 {
627 .name = "main",
628 .type = AVMEDIA_TYPE_VIDEO,
629 },{
630 .name = "reference",
631 .type = AVMEDIA_TYPE_VIDEO,
632 .config_props = config_input_ref,
633 },
634 { NULL }
635 };
636
637 static const AVFilterPad vif_outputs[] = {
638 {
639 .name = "default",
640 .type = AVMEDIA_TYPE_VIDEO,
641 .config_props = config_output,
642 },
643 { NULL }
644 };
645
646 AVFilter ff_vf_vif = {
647 .name = "vif",
648 .description = NULL_IF_CONFIG_SMALL("Calculate the VIF between two video streams."),
649 .uninit = uninit,
650 .query_formats = query_formats,
651 .priv_size = sizeof(VIFContext),
652 .priv_class = &vif_class,
653 .activate = activate,
654 .inputs = vif_inputs,
655 .outputs = vif_outputs,
656 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
657 };
658