FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_vif.c
Date: 2026-07-16 17:05:34
Exec Total Coverage
Lines: 0 302 0.0%
Functions: 0 16 0.0%
Branches: 0 114 0.0%
Line Branch Exec Source
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/internal.h"
31 #include "libavutil/mem.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34 #include "avfilter.h"
35 #include "filters.h"
36 #include "framesync.h"
37
38 #define NUM_DATA_BUFS 13
39
40 typedef struct VIFContext {
41 const AVClass *class;
42 FFFrameSync fs;
43 const AVPixFmtDescriptor *desc;
44 int width;
45 int height;
46 int nb_threads;
47 float factor;
48 float *data_buf[NUM_DATA_BUFS];
49 float **temp;
50 float *ref_data;
51 float *main_data;
52 double vif_sum[4];
53 double vif_min[4];
54 double vif_max[4];
55 uint64_t nb_frames;
56 } VIFContext;
57
58 #define OFFSET(x) offsetof(VIFContext, x)
59
60 static const AVOption vif_options[] = {
61 { NULL }
62 };
63
64 ✗ FRAMESYNC_DEFINE_CLASS(vif, VIFContext, fs);
65
66 static const uint8_t vif_filter1d_width1[4] = { 17, 9, 5, 3 };
67
68 static const float vif_filter1d_table[4][17] =
69 {
70 {
71 0.00745626912, 0.0142655009, 0.0250313189, 0.0402820669, 0.0594526194,
72 0.0804751068, 0.0999041125, 0.113746084, 0.118773937, 0.113746084,
73 0.0999041125, 0.0804751068, 0.0594526194, 0.0402820669, 0.0250313189,
74 0.0142655009, 0.00745626912
75 },
76 {
77 0.0189780835, 0.0558981746, 0.120920904, 0.192116052, 0.224173605,
78 0.192116052, 0.120920904, 0.0558981746, 0.0189780835
79 },
80 {
81 0.054488685, 0.244201347, 0.402619958, 0.244201347, 0.054488685
82 },
83 {
84 0.166378498, 0.667243004, 0.166378498
85 }
86 };
87
88 typedef struct ThreadData {
89 const float *filter;
90 const float *src;
91 float *dst;
92 int w, h;
93 int src_stride;
94 int dst_stride;
95 int filter_width;
96 float **temp;
97 } ThreadData;
98
99 ✗ static void vif_dec2(const float *src, float *dst, int w, int h,
100 int src_stride, int dst_stride)
101 {
102 ✗ const int dst_px_stride = dst_stride / 2;
103
104 ✗ for (int i = 0; i < h / 2; i++) {
105 ✗ for (int j = 0; j < w / 2; j++)
106 ✗ dst[i * dst_px_stride + j] = src[(i * 2) * src_stride + (j * 2)];
107 }
108 ✗ }
109
110 ✗ static void vif_statistic(const float *mu1_sq, const float *mu2_sq,
111 const float *mu1_mu2, const float *xx_filt,
112 const float *yy_filt, const float *xy_filt,
113 float *num, float *den, int w, int h)
114 {
115 static const float sigma_nsq = 2;
116 float mu1_sq_val, mu2_sq_val, mu1_mu2_val, xx_filt_val, yy_filt_val, xy_filt_val;
117 ✗ float sigma1_sq, sigma2_sq, sigma12, g, sv_sq, eps = 1.0e-10f;
118 ✗ float gain_limit = 100.f;
119 float num_val, den_val;
120 ✗ float accum_num = 0.0f;
121 ✗ float accum_den = 0.0f;
122
123 ✗ for (int i = 0; i < h; i++) {
124 ✗ float accum_inner_num = 0.f;
125 ✗ float accum_inner_den = 0.f;
126
127 ✗ for (int j = 0; j < w; j++) {
128 ✗ mu1_sq_val = mu1_sq[i * w + j];
129 ✗ mu2_sq_val = mu2_sq[i * w + j];
130 ✗ mu1_mu2_val = mu1_mu2[i * w + j];
131 ✗ xx_filt_val = xx_filt[i * w + j];
132 ✗ yy_filt_val = yy_filt[i * w + j];
133 ✗ xy_filt_val = xy_filt[i * w + j];
134
135 ✗ sigma1_sq = xx_filt_val - mu1_sq_val;
136 ✗ sigma2_sq = yy_filt_val - mu2_sq_val;
137 ✗ sigma12 = xy_filt_val - mu1_mu2_val;
138
139 ✗ sigma1_sq = FFMAX(sigma1_sq, 0.0f);
140 ✗ sigma2_sq = FFMAX(sigma2_sq, 0.0f);
141 ✗ sigma12 = FFMAX(sigma12, 0.0f);
142
143 ✗ g = sigma12 / (sigma1_sq + eps);
144 ✗ sv_sq = sigma2_sq - g * sigma12;
145
146 ✗ if (sigma1_sq < eps) {
147 ✗ g = 0.0f;
148 ✗ sv_sq = sigma2_sq;
149 ✗ sigma1_sq = 0.0f;
150 }
151
152 ✗ if (sigma2_sq < eps) {
153 ✗ g = 0.0f;
154 ✗ sv_sq = 0.0f;
155 }
156
157 ✗ if (g < 0.0f) {
158 ✗ sv_sq = sigma2_sq;
159 ✗ g = 0.0f;
160 }
161 ✗ sv_sq = FFMAX(sv_sq, eps);
162
163 ✗ g = FFMIN(g, gain_limit);
164
165 ✗ num_val = log2f(1.0f + g * g * sigma1_sq / (sv_sq + sigma_nsq));
166 ✗ den_val = log2f(1.0f + sigma1_sq / sigma_nsq);
167
168 ✗ if (isnan(den_val))
169 ✗ num_val = den_val = 1.f;
170
171 ✗ accum_inner_num += num_val;
172 ✗ accum_inner_den += den_val;
173 }
174
175 ✗ accum_num += accum_inner_num;
176 ✗ accum_den += accum_inner_den;
177 }
178
179 ✗ num[0] = accum_num;
180 ✗ den[0] = accum_den;
181 ✗ }
182
183 ✗ static void vif_xx_yy_xy(const float *x, const float *y, float *xx, float *yy,
184 float *xy, int w, int h)
185 {
186 ✗ for (int i = 0; i < h; i++) {
187 ✗ for (int j = 0; j < w; j++) {
188 ✗ float xval = x[j];
189 ✗ float yval = y[j];
190 ✗ float xxval = xval * xval;
191 ✗ float yyval = yval * yval;
192 ✗ float xyval = xval * yval;
193
194 ✗ xx[j] = xxval;
195 ✗ yy[j] = yyval;
196 ✗ xy[j] = xyval;
197 }
198
199 ✗ xx += w;
200 ✗ yy += w;
201 ✗ xy += w;
202 ✗ x += w;
203 ✗ y += w;
204 }
205 ✗ }
206
207 ✗ static int vif_filter1d(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
208 {
209 ✗ ThreadData *td = arg;
210 ✗ const float *filter = td->filter;
211 ✗ const float *src = td->src;
212 ✗ float *dst = td->dst;
213 ✗ int w = td->w;
214 ✗ int h = td->h;
215 ✗ int src_stride = td->src_stride;
216 ✗ int dst_stride = td->dst_stride;
217 ✗ int filt_w = td->filter_width;
218 ✗ float *temp = td->temp[jobnr];
219 ✗ const int slice_start = ff_slice_pos(h, jobnr, nb_jobs);
220 ✗ const int slice_end = ff_slice_pos(h, jobnr + 1, nb_jobs);
221
222 ✗ for (int i = slice_start; i < slice_end; i++) {
223 /** Vertical pass. */
224 ✗ for (int j = 0; j < w; j++) {
225 ✗ float sum = 0.f;
226
227 ✗ if (i >= filt_w / 2 && i < h - filt_w / 2 - 1) {
228 ✗ for (int filt_i = 0; filt_i < filt_w; filt_i++) {
229 ✗ const float filt_coeff = filter[filt_i];
230 float img_coeff;
231 ✗ int ii = i - filt_w / 2 + filt_i;
232
233 ✗ img_coeff = src[ii * src_stride + j];
234 ✗ sum += filt_coeff * img_coeff;
235 }
236 } else {
237 ✗ for (int filt_i = 0; filt_i < filt_w; filt_i++) {
238 ✗ const float filt_coeff = filter[filt_i];
239 ✗ int ii = i - filt_w / 2 + filt_i;
240 float img_coeff;
241
242 ✗ ii = avpriv_mirror(ii, h - 1);
243
244 ✗ img_coeff = src[ii * src_stride + j];
245 ✗ sum += filt_coeff * img_coeff;
246 }
247 }
248
249 ✗ temp[j] = sum;
250 }
251
252 /** Horizontal pass. */
253 ✗ for (int j = 0; j < w; j++) {
254 ✗ float sum = 0.f;
255
256 ✗ if (j >= filt_w / 2 && j < w - filt_w / 2 - 1) {
257 ✗ for (int filt_j = 0; filt_j < filt_w; filt_j++) {
258 ✗ const float filt_coeff = filter[filt_j];
259 ✗ int jj = j - filt_w / 2 + filt_j;
260 float img_coeff;
261
262 ✗ img_coeff = temp[jj];
263 ✗ sum += filt_coeff * img_coeff;
264 }
265 } else {
266 ✗ for (int filt_j = 0; filt_j < filt_w; filt_j++) {
267 ✗ const float filt_coeff = filter[filt_j];
268 ✗ int jj = j - filt_w / 2 + filt_j;
269 float img_coeff;
270
271 ✗ jj = avpriv_mirror(jj, w - 1);
272
273 ✗ img_coeff = temp[jj];
274 ✗ sum += filt_coeff * img_coeff;
275 }
276 }
277
278 ✗ dst[i * dst_stride + j] = sum;
279 }
280 }
281
282 ✗ return 0;
283 }
284
285 ✗ static int compute_vif2(AVFilterContext *ctx,
286 const float *ref, const float *main, int w, int h,
287 int ref_stride, int main_stride, float *score,
288 float *const data_buf[NUM_DATA_BUFS], float **temp,
289 int gnb_threads)
290 {
291 ThreadData td;
292 ✗ float *ref_scale = data_buf[0];
293 ✗ float *main_scale = data_buf[1];
294 ✗ float *ref_sq = data_buf[2];
295 ✗ float *main_sq = data_buf[3];
296 ✗ float *ref_main = data_buf[4];
297 ✗ float *mu1 = data_buf[5];
298 ✗ float *mu2 = data_buf[6];
299 ✗ float *mu1_sq = data_buf[7];
300 ✗ float *mu2_sq = data_buf[8];
301 ✗ float *mu1_mu2 = data_buf[9];
302 ✗ float *ref_sq_filt = data_buf[10];
303 ✗ float *main_sq_filt = data_buf[11];
304 ✗ float *ref_main_filt = data_buf[12];
305
306 ✗ const float *curr_ref_scale = ref;
307 ✗ const float *curr_main_scale = main;
308 ✗ int curr_ref_stride = ref_stride;
309 ✗ int curr_main_stride = main_stride;
310
311 ✗ float num = 0.f;
312 ✗ float den = 0.f;
313
314 ✗ for (int scale = 0; scale < 4; scale++) {
315 ✗ const float *filter = vif_filter1d_table[scale];
316 ✗ int filter_width = vif_filter1d_width1[scale];
317 ✗ const int nb_threads = FFMIN(h, gnb_threads);
318 ✗ int buf_valid_w = w;
319 ✗ int buf_valid_h = h;
320
321 ✗ td.filter = filter;
322 ✗ td.filter_width = filter_width;
323
324 ✗ if (scale > 0) {
325 ✗ td.src = curr_ref_scale;
326 ✗ td.dst = mu1;
327 ✗ td.w = w;
328 ✗ td.h = h;
329 ✗ td.src_stride = curr_ref_stride;
330 ✗ td.dst_stride = w;
331 ✗ td.temp = temp;
332 ✗ ff_filter_execute(ctx, vif_filter1d, &td, NULL, nb_threads);
333
334 ✗ td.src = curr_main_scale;
335 ✗ td.dst = mu2;
336 ✗ td.src_stride = curr_main_stride;
337 ✗ ff_filter_execute(ctx, vif_filter1d, &td, NULL, nb_threads);
338
339 ✗ vif_dec2(mu1, ref_scale, buf_valid_w, buf_valid_h, w, w);
340 ✗ vif_dec2(mu2, main_scale, buf_valid_w, buf_valid_h, w, w);
341
342 ✗ w = buf_valid_w / 2;
343 ✗ h = buf_valid_h / 2;
344
345 ✗ buf_valid_w = w;
346 ✗ buf_valid_h = h;
347
348 ✗ curr_ref_scale = ref_scale;
349 ✗ curr_main_scale = main_scale;
350
351 ✗ curr_ref_stride = w;
352 ✗ curr_main_stride = w;
353 }
354
355 ✗ td.src = curr_ref_scale;
356 ✗ td.dst = mu1;
357 ✗ td.w = w;
358 ✗ td.h = h;
359 ✗ td.src_stride = curr_ref_stride;
360 ✗ td.dst_stride = w;
361 ✗ td.temp = temp;
362 ✗ ff_filter_execute(ctx, vif_filter1d, &td, NULL, nb_threads);
363
364 ✗ td.src = curr_main_scale;
365 ✗ td.dst = mu2;
366 ✗ td.src_stride = curr_main_stride;
367 ✗ ff_filter_execute(ctx, vif_filter1d, &td, NULL, nb_threads);
368
369 ✗ vif_xx_yy_xy(mu1, mu2, mu1_sq, mu2_sq, mu1_mu2, w, h);
370
371 ✗ vif_xx_yy_xy(curr_ref_scale, curr_main_scale, ref_sq, main_sq, ref_main, w, h);
372
373 ✗ td.src = ref_sq;
374 ✗ td.dst = ref_sq_filt;
375 ✗ td.src_stride = w;
376 ✗ ff_filter_execute(ctx, vif_filter1d, &td, NULL, nb_threads);
377
378 ✗ td.src = main_sq;
379 ✗ td.dst = main_sq_filt;
380 ✗ td.src_stride = w;
381 ✗ ff_filter_execute(ctx, vif_filter1d, &td, NULL, nb_threads);
382
383 ✗ td.src = ref_main;
384 ✗ td.dst = ref_main_filt;
385 ✗ ff_filter_execute(ctx, vif_filter1d, &td, NULL, nb_threads);
386
387 ✗ vif_statistic(mu1_sq, mu2_sq, mu1_mu2, ref_sq_filt, main_sq_filt,
388 ref_main_filt, &num, &den, w, h);
389
390 ✗ score[scale] = den <= FLT_EPSILON ? 1.f : num / den;
391 }
392
393 ✗ return 0;
394 }
395
396 #define offset_fn(type, bits) \
397 static void offset_##bits##bit(VIFContext *s, \
398 const AVFrame *ref, \
399 AVFrame *main, int stride)\
400 { \
401 int w = s->width; \
402 int h = s->height; \
403 \
404 int ref_stride = ref->linesize[0]; \
405 int main_stride = main->linesize[0]; \
406 \
407 const type *ref_ptr = (const type *) ref->data[0]; \
408 const type *main_ptr = (const type *) main->data[0]; \
409 \
410 const float factor = s->factor; \
411 \
412 float *ref_ptr_data = s->ref_data; \
413 float *main_ptr_data = s->main_data; \
414 \
415 for (int i = 0; i < h; i++) { \
416 for (int j = 0; j < w; j++) { \
417 ref_ptr_data[j] = ref_ptr[j] * factor - 128.f; \
418 main_ptr_data[j] = main_ptr[j] * factor - 128.f; \
419 } \
420 ref_ptr += ref_stride / sizeof(type); \
421 ref_ptr_data += w; \
422 main_ptr += main_stride / sizeof(type); \
423 main_ptr_data += w; \
424 } \
425 }
426
427 ✗ offset_fn(uint8_t, 8)
428 ✗ offset_fn(uint16_t, 16)
429
430 ✗ static void set_meta(AVDictionary **metadata, const char *key, float d)
431 {
432 char value[257];
433 ✗ snprintf(value, sizeof(value), "%f", d);
434 ✗ av_dict_set(metadata, key, value, 0);
435 ✗ }
436
437 ✗ static AVFrame *do_vif(AVFilterContext *ctx, AVFrame *main, const AVFrame *ref)
438 {
439 ✗ VIFContext *s = ctx->priv;
440 ✗ AVDictionary **metadata = &main->metadata;
441 float score[4];
442
443 ✗ s->factor = 1.f / (1 << (s->desc->comp[0].depth - 8));
444 ✗ if (s->desc->comp[0].depth <= 8) {
445 ✗ offset_8bit(s, ref, main, s->width);
446 } else {
447 ✗ offset_16bit(s, ref, main, s->width);
448 }
449
450 ✗ compute_vif2(ctx, s->ref_data, s->main_data,
451 s->width, s->height, s->width, s->width,
452 ✗ score, s->data_buf, s->temp, s->nb_threads);
453
454 ✗ set_meta(metadata, "lavfi.vif.scale.0", score[0]);
455 ✗ set_meta(metadata, "lavfi.vif.scale.1", score[1]);
456 ✗ set_meta(metadata, "lavfi.vif.scale.2", score[2]);
457 ✗ set_meta(metadata, "lavfi.vif.scale.3", score[3]);
458
459 ✗ for (int i = 0; i < 4; i++) {
460 ✗ s->vif_min[i] = FFMIN(s->vif_min[i], score[i]);
461 ✗ s->vif_max[i] = FFMAX(s->vif_max[i], score[i]);
462 ✗ s->vif_sum[i] += score[i];
463 }
464
465 ✗ s->nb_frames++;
466
467 ✗ return main;
468 }
469
470 static const enum AVPixelFormat pix_fmts[] = {
471 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10,
472 AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
473 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
474 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
475 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
476 AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
477 #define PF(suf) AV_PIX_FMT_YUV420##suf, AV_PIX_FMT_YUV422##suf, AV_PIX_FMT_YUV444##suf
478 PF(P9), PF(P10), PF(P12), PF(P14), PF(P16),
479 AV_PIX_FMT_NONE
480 };
481
482 ✗ static int config_input_ref(AVFilterLink *inlink)
483 {
484 ✗ AVFilterContext *ctx = inlink->dst;
485 ✗ VIFContext *s = ctx->priv;
486
487 ✗ if (ctx->inputs[0]->w != ctx->inputs[1]->w ||
488 ✗ ctx->inputs[0]->h != ctx->inputs[1]->h) {
489 ✗ av_log(ctx, AV_LOG_ERROR, "Width and height of input videos must be same.\n");
490 ✗ return AVERROR(EINVAL);
491 }
492
493 ✗ s->desc = av_pix_fmt_desc_get(inlink->format);
494 ✗ s->width = ctx->inputs[0]->w;
495 ✗ s->height = ctx->inputs[0]->h;
496 ✗ s->nb_threads = ff_filter_get_nb_threads(ctx);
497
498 ✗ for (int i = 0; i < 4; i++) {
499 ✗ s->vif_min[i] = DBL_MAX;
500 ✗ s->vif_max[i] = -DBL_MAX;
501 }
502
503 ✗ for (int i = 0; i < NUM_DATA_BUFS; i++) {
504 ✗ if (!(s->data_buf[i] = av_calloc(s->width, s->height * sizeof(float))))
505 ✗ return AVERROR(ENOMEM);
506 }
507
508 ✗ if (!(s->ref_data = av_calloc(s->width, s->height * sizeof(float))))
509 ✗ return AVERROR(ENOMEM);
510
511 ✗ if (!(s->main_data = av_calloc(s->width, s->height * sizeof(float))))
512 ✗ return AVERROR(ENOMEM);
513
514 ✗ if (!(s->temp = av_calloc(s->nb_threads, sizeof(s->temp[0]))))
515 ✗ return AVERROR(ENOMEM);
516
517 ✗ for (int i = 0; i < s->nb_threads; i++) {
518 ✗ if (!(s->temp[i] = av_calloc(s->width, sizeof(float))))
519 ✗ return AVERROR(ENOMEM);
520 }
521
522 ✗ return 0;
523 }
524
525 ✗ static int process_frame(FFFrameSync *fs)
526 {
527 ✗ AVFilterContext *ctx = fs->parent;
528 ✗ VIFContext *s = fs->opaque;
529 ✗ AVFilterLink *outlink = ctx->outputs[0];
530 ✗ AVFrame *out_frame, *main_frame = NULL, *ref_frame = NULL;
531 int ret;
532
533 ✗ ret = ff_framesync_dualinput_get(fs, &main_frame, &ref_frame);
534 ✗ if (ret < 0)
535 ✗ return ret;
536
537 ✗ if (ctx->is_disabled || !ref_frame) {
538 ✗ out_frame = main_frame;
539 } else {
540 ✗ out_frame = do_vif(ctx, main_frame, ref_frame);
541 }
542
543 ✗ out_frame->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
544
545 ✗ return ff_filter_frame(outlink, out_frame);
546 }
547
548
549 ✗ static int config_output(AVFilterLink *outlink)
550 {
551 ✗ AVFilterContext *ctx = outlink->src;
552 ✗ VIFContext *s = ctx->priv;
553 ✗ AVFilterLink *mainlink = ctx->inputs[0];
554 ✗ FilterLink *il = ff_filter_link(mainlink);
555 ✗ FilterLink *ol = ff_filter_link(outlink);
556 FFFrameSyncIn *in;
557 int ret;
558
559 ✗ outlink->w = mainlink->w;
560 ✗ outlink->h = mainlink->h;
561 ✗ outlink->time_base = mainlink->time_base;
562 ✗ outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio;
563 ✗ ol->frame_rate = il->frame_rate;
564 ✗ if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
565 ✗ return ret;
566
567 ✗ in = s->fs.in;
568 ✗ in[0].time_base = mainlink->time_base;
569 ✗ in[1].time_base = ctx->inputs[1]->time_base;
570 ✗ in[0].sync = 2;
571 ✗ in[0].before = EXT_STOP;
572 ✗ in[0].after = EXT_STOP;
573 ✗ in[1].sync = 1;
574 ✗ in[1].before = EXT_STOP;
575 ✗ in[1].after = EXT_STOP;
576 ✗ s->fs.opaque = s;
577 ✗ s->fs.on_event = process_frame;
578
579 ✗ return ff_framesync_configure(&s->fs);
580 }
581
582 ✗ static int activate(AVFilterContext *ctx)
583 {
584 ✗ VIFContext *s = ctx->priv;
585 ✗ return ff_framesync_activate(&s->fs);
586 }
587
588 ✗ static av_cold void uninit(AVFilterContext *ctx)
589 {
590 ✗ VIFContext *s = ctx->priv;
591
592 ✗ if (s->nb_frames > 0) {
593 ✗ for (int i = 0; i < 4; i++)
594 ✗ av_log(ctx, AV_LOG_INFO, "VIF scale=%d average:%f min:%f: max:%f\n",
595 ✗ i, s->vif_sum[i] / s->nb_frames, s->vif_min[i], s->vif_max[i]);
596 }
597
598 ✗ for (int i = 0; i < NUM_DATA_BUFS; i++)
599 ✗ av_freep(&s->data_buf[i]);
600
601 ✗ av_freep(&s->ref_data);
602 ✗ av_freep(&s->main_data);
603
604 ✗ for (int i = 0; i < s->nb_threads && s->temp; i++)
605 ✗ av_freep(&s->temp[i]);
606
607 ✗ av_freep(&s->temp);
608
609 ✗ ff_framesync_uninit(&s->fs);
610 ✗ }
611
612 static const AVFilterPad vif_inputs[] = {
613 {
614 .name = "main",
615 .type = AVMEDIA_TYPE_VIDEO,
616 },{
617 .name = "reference",
618 .type = AVMEDIA_TYPE_VIDEO,
619 .config_props = config_input_ref,
620 },
621 };
622
623 static const AVFilterPad vif_outputs[] = {
624 {
625 .name = "default",
626 .type = AVMEDIA_TYPE_VIDEO,
627 .config_props = config_output,
628 },
629 };
630
631 const FFFilter ff_vf_vif = {
632 .p.name = "vif",
633 .p.description = NULL_IF_CONFIG_SMALL("Calculate the VIF between two video streams."),
634 .p.priv_class = &vif_class,
635 .p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
636 AVFILTER_FLAG_SLICE_THREADS |
637 AVFILTER_FLAG_METADATA_ONLY,
638 .preinit = vif_framesync_preinit,
639 .uninit = uninit,
640 .priv_size = sizeof(VIFContext),
641 .activate = activate,
642 FILTER_INPUTS(vif_inputs),
643 FILTER_OUTPUTS(vif_outputs),
644 FILTER_PIXFMTS_ARRAY(pix_fmts),
645 };
646