FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_ssim.c
Date: 2025-10-28 01:11:23
Exec Total Coverage
Lines: 197 297 66.3%
Functions: 13 18 72.2%
Branches: 74 122 60.7%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2003-2013 Loren Merritt
3 * Copyright (c) 2015 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 /* Computes the Structural Similarity Metric between two video streams.
23 * original algorithm:
24 * Z. Wang, A. C. Bovik, H. R. Sheikh and E. P. Simoncelli,
25 * "Image quality assessment: From error visibility to structural similarity,"
26 * IEEE Transactions on Image Processing, vol. 13, no. 4, pp. 600-612, Apr. 2004.
27 *
28 * To improve speed, this implementation uses the standard approximation of
29 * overlapped 8x8 block sums, rather than the original gaussian weights.
30 */
31
32 /*
33 * @file
34 * Calculate the SSIM between two input videos.
35 */
36
37 #include "libavutil/avstring.h"
38 #include "libavutil/file_open.h"
39 #include "libavutil/mem.h"
40 #include "libavutil/opt.h"
41 #include "libavutil/pixdesc.h"
42 #include "avfilter.h"
43 #include "drawutils.h"
44 #include "filters.h"
45 #include "framesync.h"
46 #include "ssim.h"
47
48 typedef struct SSIMContext {
49 const AVClass *class;
50 FFFrameSync fs;
51 FILE *stats_file;
52 char *stats_file_str;
53 int nb_components;
54 int nb_threads;
55 int max;
56 uint64_t nb_frames;
57 double ssim[4], ssim_total;
58 char comps[4];
59 double coefs[4];
60 uint8_t rgba_map[4];
61 int planewidth[4];
62 int planeheight[4];
63 int **temp;
64 int is_rgb;
65 double **score;
66 int (*ssim_plane)(AVFilterContext *ctx, void *arg,
67 int jobnr, int nb_jobs);
68 SSIMDSPContext dsp;
69 } SSIMContext;
70
71 #define OFFSET(x) offsetof(SSIMContext, x)
72 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
73
74 static const AVOption ssim_options[] = {
75 {"stats_file", "Set file where to store per-frame difference information", OFFSET(stats_file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
76 {"f", "Set file where to store per-frame difference information", OFFSET(stats_file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
77 { NULL }
78 };
79
80
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 8 FRAMESYNC_DEFINE_CLASS(ssim, SSIMContext, fs);
81
82 50 static void set_meta(AVDictionary **metadata, const char *key, char comp, float d)
83 {
84 char value[128];
85 50 snprintf(value, sizeof(value), "%f", d);
86
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 50 if (comp) {
87 char key2[128];
88 30 snprintf(key2, sizeof(key2), "%s%c", key, comp);
89 30 av_dict_set(metadata, key2, value, 0);
90 } else {
91 20 av_dict_set(metadata, key, value, 0);
92 }
93 50 }
94
95 ✗ static void ssim_4x4xn_16bit(const uint8_t *main8, ptrdiff_t main_stride,
96 const uint8_t *ref8, ptrdiff_t ref_stride,
97 int64_t (*sums)[4], int width)
98 {
99 ✗ const uint16_t *main16 = (const uint16_t *)main8;
100 ✗ const uint16_t *ref16 = (const uint16_t *)ref8;
101 int x, y, z;
102
103 ✗ main_stride >>= 1;
104 ✗ ref_stride >>= 1;
105
106 ✗ for (z = 0; z < width; z++) {
107 ✗ uint64_t s1 = 0, s2 = 0, ss = 0, s12 = 0;
108
109 ✗ for (y = 0; y < 4; y++) {
110 ✗ for (x = 0; x < 4; x++) {
111 ✗ unsigned a = main16[x + y * main_stride];
112 ✗ unsigned b = ref16[x + y * ref_stride];
113
114 ✗ s1 += a;
115 ✗ s2 += b;
116 ✗ ss += a*a;
117 ✗ ss += b*b;
118 ✗ s12 += a*b;
119 }
120 }
121
122 ✗ sums[z][0] = s1;
123 ✗ sums[z][1] = s2;
124 ✗ sums[z][2] = ss;
125 ✗ sums[z][3] = s12;
126 ✗ main16 += 4;
127 ✗ ref16 += 4;
128 }
129 ✗ }
130
131 1740 static void ssim_4x4xn_8bit(const uint8_t *main, ptrdiff_t main_stride,
132 const uint8_t *ref, ptrdiff_t ref_stride,
133 int (*sums)[4], int width)
134 {
135 int x, y, z;
136
137
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 110200 for (z = 0; z < width; z++) {
138 108460 uint32_t s1 = 0, s2 = 0, ss = 0, s12 = 0;
139
140
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141
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 2169200 for (x = 0; x < 4; x++) {
142 1735360 int a = main[x + y * main_stride];
143 1735360 int b = ref[x + y * ref_stride];
144
145 1735360 s1 += a;
146 1735360 s2 += b;
147 1735360 ss += a*a;
148 1735360 ss += b*b;
149 1735360 s12 += a*b;
150 }
151 }
152
153 108460 sums[z][0] = s1;
154 108460 sums[z][1] = s2;
155 108460 sums[z][2] = ss;
156 108460 sums[z][3] = s12;
157 108460 main += 4;
158 108460 ref += 4;
159 }
160 1740 }
161
162 ✗ static float ssim_end1x(int64_t s1, int64_t s2, int64_t ss, int64_t s12, int max)
163 {
164 ✗ int64_t ssim_c1 = (int64_t)(.01*.01*max*max*64 + .5);
165 ✗ int64_t ssim_c2 = (int64_t)(.03*.03*max*max*64*63 + .5);
166
167 ✗ int64_t fs1 = s1;
168 ✗ int64_t fs2 = s2;
169 ✗ int64_t fss = ss;
170 ✗ int64_t fs12 = s12;
171 ✗ int64_t vars = fss * 64 - fs1 * fs1 - fs2 * fs2;
172 ✗ int64_t covar = fs12 * 64 - fs1 * fs2;
173
174 ✗ return (float)(2 * fs1 * fs2 + ssim_c1) * (float)(2 * covar + ssim_c2)
175 ✗ / ((float)(fs1 * fs1 + fs2 * fs2 + ssim_c1) * (float)(vars + ssim_c2));
176 }
177
178 90160 static float ssim_end1(int s1, int s2, int ss, int s12)
179 {
180 static const int ssim_c1 = (int)(.01*.01*255*255*64 + .5);
181 static const int ssim_c2 = (int)(.03*.03*255*255*64*63 + .5);
182
183 90160 int fs1 = s1;
184 90160 int fs2 = s2;
185 90160 int fss = ss;
186 90160 int fs12 = s12;
187 90160 int vars = fss * 64 - fs1 * fs1 - fs2 * fs2;
188 90160 int covar = fs12 * 64 - fs1 * fs2;
189
190 90160 return (float)(2 * fs1 * fs2 + ssim_c1) * (float)(2 * covar + ssim_c2)
191 90160 / ((float)(fs1 * fs1 + fs2 * fs2 + ssim_c1) * (float)(vars + ssim_c2));
192 }
193
194 ✗ static float ssim_endn_16bit(const int64_t (*sum0)[4], const int64_t (*sum1)[4], int width, int max)
195 {
196 ✗ float ssim = 0.0;
197
198 ✗ for (int i = 0; i < width; i++)
199 ✗ ssim += ssim_end1x(sum0[i][0] + sum0[i + 1][0] + sum1[i][0] + sum1[i + 1][0],
200 ✗ sum0[i][1] + sum0[i + 1][1] + sum1[i][1] + sum1[i + 1][1],
201 ✗ sum0[i][2] + sum0[i + 1][2] + sum1[i][2] + sum1[i + 1][2],
202 ✗ sum0[i][3] + sum0[i + 1][3] + sum1[i][3] + sum1[i + 1][3],
203 max);
204 ✗ return ssim;
205 }
206
207 1470 static double ssim_endn_8bit(const int (*sum0)[4], const int (*sum1)[4], int width)
208 {
209 1470 double ssim = 0.0;
210
211
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 91630 for (int i = 0; i < width; i++)
212 90160 ssim += ssim_end1(sum0[i][0] + sum0[i + 1][0] + sum1[i][0] + sum1[i + 1][0],
213 90160 sum0[i][1] + sum0[i + 1][1] + sum1[i][1] + sum1[i + 1][1],
214 90160 sum0[i][2] + sum0[i + 1][2] + sum1[i][2] + sum1[i + 1][2],
215 90160 sum0[i][3] + sum0[i + 1][3] + sum1[i][3] + sum1[i + 1][3]);
216 1470 return ssim;
217 }
218
219 #define SUM_LEN(w) (((w) >> 2) + 3)
220
221 typedef struct ThreadData {
222 const uint8_t *main_data[4];
223 const uint8_t *ref_data[4];
224 int main_linesize[4];
225 int ref_linesize[4];
226 int planewidth[4];
227 int planeheight[4];
228 double **score;
229 int **temp;
230 int nb_components;
231 int max;
232 SSIMDSPContext *dsp;
233 } ThreadData;
234
235 ✗ static int ssim_plane_16bit(AVFilterContext *ctx, void *arg,
236 int jobnr, int nb_jobs)
237 {
238 ✗ ThreadData *td = arg;
239 ✗ double *score = td->score[jobnr];
240 ✗ void *temp = td->temp[jobnr];
241 ✗ const int max = td->max;
242
243 ✗ for (int c = 0; c < td->nb_components; c++) {
244 ✗ const uint8_t *main_data = td->main_data[c];
245 ✗ const uint8_t *ref_data = td->ref_data[c];
246 ✗ const int main_stride = td->main_linesize[c];
247 ✗ const int ref_stride = td->ref_linesize[c];
248 ✗ int width = td->planewidth[c];
249 ✗ int height = td->planeheight[c];
250 ✗ const int slice_start = ((height >> 2) * jobnr) / nb_jobs;
251 ✗ const int slice_end = ((height >> 2) * (jobnr+1)) / nb_jobs;
252 ✗ const int ystart = FFMAX(1, slice_start);
253 ✗ int z = ystart - 1;
254 ✗ double ssim = 0.0;
255 ✗ int64_t (*sum0)[4] = temp;
256 ✗ int64_t (*sum1)[4] = sum0 + SUM_LEN(width);
257
258 ✗ width >>= 2;
259 ✗ height >>= 2;
260
261 ✗ for (int y = ystart; y < slice_end; y++) {
262 ✗ for (; z <= y; z++) {
263 ✗ FFSWAP(void*, sum0, sum1);
264 ✗ ssim_4x4xn_16bit(&main_data[4 * z * main_stride], main_stride,
265 ✗ &ref_data[4 * z * ref_stride], ref_stride,
266 sum0, width);
267 }
268
269 ✗ ssim += ssim_endn_16bit((const int64_t (*)[4])sum0, (const int64_t (*)[4])sum1, width - 1, max);
270 }
271
272 ✗ score[c] = ssim;
273 }
274
275 ✗ return 0;
276 }
277
278 90 static int ssim_plane(AVFilterContext *ctx, void *arg,
279 int jobnr, int nb_jobs)
280 {
281 90 ThreadData *td = arg;
282 90 double *score = td->score[jobnr];
283 90 void *temp = td->temp[jobnr];
284 90 SSIMDSPContext *dsp = td->dsp;
285
286
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 360 for (int c = 0; c < td->nb_components; c++) {
287 270 const uint8_t *main_data = td->main_data[c];
288 270 const uint8_t *ref_data = td->ref_data[c];
289 270 const int main_stride = td->main_linesize[c];
290 270 const int ref_stride = td->ref_linesize[c];
291 270 int width = td->planewidth[c];
292 270 int height = td->planeheight[c];
293 270 const int slice_start = ((height >> 2) * jobnr) / nb_jobs;
294 270 const int slice_end = ((height >> 2) * (jobnr+1)) / nb_jobs;
295 270 const int ystart = FFMAX(1, slice_start);
296 270 int z = ystart - 1;
297 270 double ssim = 0.0;
298 270 int (*sum0)[4] = temp;
299 270 int (*sum1)[4] = sum0 + SUM_LEN(width);
300
301 270 width >>= 2;
302 270 height >>= 2;
303
304
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 3210 for (; z <= y; z++) {
306 1740 FFSWAP(void*, sum0, sum1);
307 1740 dsp->ssim_4x4_line(&main_data[4 * z * main_stride], main_stride,
308 1740 &ref_data[4 * z * ref_stride], ref_stride,
309 sum0, width);
310 }
311
312 1470 ssim += dsp->ssim_end_line((const int (*)[4])sum0, (const int (*)[4])sum1, width - 1);
313 }
314
315 270 score[c] = ssim;
316 }
317
318 90 return 0;
319 }
320
321 18 static double ssim_db(double ssim, double weight)
322 {
323
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 18 return (fabs(weight - ssim) > 1e-9) ? 10.0 * log10(weight / (weight - ssim)) : INFINITY;
324 }
325
326 10 static int do_ssim(FFFrameSync *fs)
327 {
328 10 AVFilterContext *ctx = fs->parent;
329 10 SSIMContext *s = ctx->priv;
330 AVFrame *master, *ref;
331 AVDictionary **metadata;
332 10 double c[4] = {0}, ssimv = 0.0;
333 ThreadData td;
334 int ret, i;
335
336 10 ret = ff_framesync_dualinput_get(fs, &master, &ref);
337
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 10 if (ret < 0)
338 ✗ return ret;
339
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 10 if (ctx->is_disabled || !ref)
340 ✗ return ff_filter_frame(ctx->outputs[0], master);
341 10 metadata = &master->metadata;
342
343 10 s->nb_frames++;
344
345 10 td.nb_components = s->nb_components;
346 10 td.dsp = &s->dsp;
347 10 td.score = s->score;
348 10 td.temp = s->temp;
349 10 td.max = s->max;
350
351
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 40 for (int n = 0; n < s->nb_components; n++) {
352 30 td.main_data[n] = master->data[n];
353 30 td.ref_data[n] = ref->data[n];
354 30 td.main_linesize[n] = master->linesize[n];
355 30 td.ref_linesize[n] = ref->linesize[n];
356 30 td.planewidth[n] = s->planewidth[n];
357 30 td.planeheight[n] = s->planeheight[n];
358 }
359
360
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 10 if (master->color_range != ref->color_range) {
361 ✗ av_log(ctx, AV_LOG_WARNING, "master and reference "
362 "frames use different color ranges (%s != %s)\n",
363 ✗ av_color_range_name(master->color_range),
364 ✗ av_color_range_name(ref->color_range));
365 }
366
367 10 ff_filter_execute(ctx, s->ssim_plane, &td, NULL,
368 10 FFMIN((s->planeheight[1] + 3) >> 2, s->nb_threads));
369
370
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371
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 300 for (int j = 0; j < s->nb_threads; j++)
372 270 c[i] += s->score[j][i];
373 30 c[i] = c[i] / (((s->planewidth[i] >> 2) - 1) * ((s->planeheight[i] >> 2) - 1));
374 }
375
376
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 40 for (i = 0; i < s->nb_components; i++) {
377 30 ssimv += s->coefs[i] * c[i];
378 30 s->ssim[i] += c[i];
379 }
380
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382
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 30 int cidx = s->is_rgb ? s->rgba_map[i] : i;
383 30 set_meta(metadata, "lavfi.ssim.", s->comps[i], c[cidx]);
384 }
385 10 s->ssim_total += ssimv;
386
387 10 set_meta(metadata, "lavfi.ssim.All", 0, ssimv);
388 10 set_meta(metadata, "lavfi.ssim.dB", 0, ssim_db(ssimv, 1.0));
389
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 10 if (s->stats_file) {
391 ✗ fprintf(s->stats_file, "n:%"PRId64" ", s->nb_frames);
392
393 ✗ for (i = 0; i < s->nb_components; i++) {
394 ✗ int cidx = s->is_rgb ? s->rgba_map[i] : i;
395 ✗ fprintf(s->stats_file, "%c:%f ", s->comps[i], c[cidx]);
396 }
397
398 ✗ fprintf(s->stats_file, "All:%f (%f)\n", ssimv, ssim_db(ssimv, 1.0));
399 }
400
401 10 return ff_filter_frame(ctx->outputs[0], master);
402 }
403
404 4 static av_cold int init(AVFilterContext *ctx)
405 {
406 4 SSIMContext *s = ctx->priv;
407
408
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 4 if (s->stats_file_str) {
409 ✗ if (!strcmp(s->stats_file_str, "-")) {
410 ✗ s->stats_file = stdout;
411 } else {
412 ✗ s->stats_file = avpriv_fopen_utf8(s->stats_file_str, "w");
413 ✗ if (!s->stats_file) {
414 ✗ int err = AVERROR(errno);
415 ✗ av_log(ctx, AV_LOG_ERROR, "Could not open stats file %s: %s\n",
416 ✗ s->stats_file_str, av_err2str(err));
417 ✗ return err;
418 }
419 }
420 }
421
422 4 s->fs.on_event = do_ssim;
423 4 return 0;
424 }
425
426 static const enum AVPixelFormat pix_fmts[] = {
427 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10,
428 AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
429 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
430 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
431 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
432 AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
433 AV_PIX_FMT_GBRP,
434 #define PF(suf) AV_PIX_FMT_YUV420##suf, AV_PIX_FMT_YUV422##suf, AV_PIX_FMT_YUV444##suf, AV_PIX_FMT_GBR##suf
435 PF(P9), PF(P10), PF(P12), PF(P14), PF(P16),
436 AV_PIX_FMT_NONE
437 };
438
439 2 static int config_input_ref(AVFilterLink *inlink)
440 {
441 2 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
442 2 AVFilterContext *ctx = inlink->dst;
443 2 SSIMContext *s = ctx->priv;
444 2 int sum = 0;
445
446 2 s->nb_threads = ff_filter_get_nb_threads(ctx);
447 2 s->nb_components = desc->nb_components;
448
449
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 2 if (ctx->inputs[0]->w != ctx->inputs[1]->w ||
450
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 2 ctx->inputs[0]->h != ctx->inputs[1]->h) {
451 ✗ av_log(ctx, AV_LOG_ERROR, "Width and height of input videos must be same.\n");
452 ✗ return AVERROR(EINVAL);
453 }
454
455 2 s->is_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0;
456
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 2 s->comps[0] = s->is_rgb ? 'R' : 'Y';
457
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 2 s->comps[1] = s->is_rgb ? 'G' : 'U';
458
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 2 s->comps[2] = s->is_rgb ? 'B' : 'V';
459 2 s->comps[3] = 'A';
460
461 2 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
462 2 s->planeheight[0] = s->planeheight[3] = inlink->h;
463 2 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
464 2 s->planewidth[0] = s->planewidth[3] = inlink->w;
465
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 8 for (int i = 0; i < s->nb_components; i++)
466 6 sum += s->planeheight[i] * s->planewidth[i];
467
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 8 for (int i = 0; i < s->nb_components; i++)
468 6 s->coefs[i] = (double) s->planeheight[i] * s->planewidth[i] / sum;
469
470 2 s->temp = av_calloc(s->nb_threads, sizeof(*s->temp));
471
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 2 if (!s->temp)
472 ✗ return AVERROR(ENOMEM);
473
474
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 20 for (int t = 0; t < s->nb_threads; t++) {
475
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 18 s->temp[t] = av_calloc(2 * SUM_LEN(inlink->w), (desc->comp[0].depth > 8) ? sizeof(int64_t[4]) : sizeof(int[4]));
476
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 18 if (!s->temp[t])
477 ✗ return AVERROR(ENOMEM);
478 }
479 2 s->max = (1 << desc->comp[0].depth) - 1;
480
481
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 2 s->ssim_plane = desc->comp[0].depth > 8 ? ssim_plane_16bit : ssim_plane;
482 2 s->dsp.ssim_4x4_line = ssim_4x4xn_8bit;
483 2 s->dsp.ssim_end_line = ssim_endn_8bit;
484 #if ARCH_X86
485 2 ff_ssim_init_x86(&s->dsp);
486 #endif
487
488 2 s->score = av_calloc(s->nb_threads, sizeof(*s->score));
489
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 2 if (!s->score)
490 ✗ return AVERROR(ENOMEM);
491
492
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 20 for (int t = 0; t < s->nb_threads; t++) {
493 18 s->score[t] = av_calloc(s->nb_components, sizeof(*s->score[0]));
494
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 18 if (!s->score[t])
495 ✗ return AVERROR(ENOMEM);
496 }
497
498 2 return 0;
499 }
500
501 2 static int config_output(AVFilterLink *outlink)
502 {
503 2 AVFilterContext *ctx = outlink->src;
504 2 SSIMContext *s = ctx->priv;
505 2 AVFilterLink *mainlink = ctx->inputs[0];
506 2 FilterLink *il = ff_filter_link(mainlink);
507 2 FilterLink *ol = ff_filter_link(outlink);
508 int ret;
509
510 2 ret = ff_framesync_init_dualinput(&s->fs, ctx);
511
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 2 if (ret < 0)
512 ✗ return ret;
513 2 outlink->w = mainlink->w;
514 2 outlink->h = mainlink->h;
515 2 outlink->time_base = mainlink->time_base;
516 2 outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio;
517 2 ol->frame_rate = il->frame_rate;
518
519
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 2 if ((ret = ff_framesync_configure(&s->fs)) < 0)
520 ✗ return ret;
521
522 2 outlink->time_base = s->fs.time_base;
523
524
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 4 if (av_cmp_q(mainlink->time_base, outlink->time_base) ||
525 2 av_cmp_q(ctx->inputs[1]->time_base, outlink->time_base))
526 ✗ av_log(ctx, AV_LOG_WARNING, "not matching timebases found between first input: %d/%d and second input %d/%d, results may be incorrect!\n",
527 mainlink->time_base.num, mainlink->time_base.den,
528 ✗ ctx->inputs[1]->time_base.num, ctx->inputs[1]->time_base.den);
529
530 2 return 0;
531 }
532
533 30 static int activate(AVFilterContext *ctx)
534 {
535 30 SSIMContext *s = ctx->priv;
536 30 return ff_framesync_activate(&s->fs);
537 }
538
539 4 static av_cold void uninit(AVFilterContext *ctx)
540 {
541 4 SSIMContext *s = ctx->priv;
542
543
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 4 if (s->nb_frames > 0) {
544 char buf[256];
545 2 buf[0] = 0;
546
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 8 for (int i = 0; i < s->nb_components; i++) {
547
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 6 int c = s->is_rgb ? s->rgba_map[i] : i;
548 6 av_strlcatf(buf, sizeof(buf), " %c:%f (%f)", s->comps[i], s->ssim[c] / s->nb_frames,
549 6 ssim_db(s->ssim[c], s->nb_frames));
550 }
551 4 av_log(ctx, AV_LOG_INFO, "SSIM%s All:%f (%f)\n", buf,
552 2 s->ssim_total / s->nb_frames, ssim_db(s->ssim_total, s->nb_frames));
553 }
554
555 4 ff_framesync_uninit(&s->fs);
556
557
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 4 if (s->stats_file && s->stats_file != stdout)
558 ✗ fclose(s->stats_file);
559
560
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 22 for (int t = 0; t < s->nb_threads && s->score; t++)
561 18 av_freep(&s->score[t]);
562 4 av_freep(&s->score);
563
564
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 22 for (int t = 0; t < s->nb_threads && s->temp; t++)
565 18 av_freep(&s->temp[t]);
566 4 av_freep(&s->temp);
567 4 }
568
569 static const AVFilterPad ssim_inputs[] = {
570 {
571 .name = "main",
572 .type = AVMEDIA_TYPE_VIDEO,
573 },{
574 .name = "reference",
575 .type = AVMEDIA_TYPE_VIDEO,
576 .config_props = config_input_ref,
577 },
578 };
579
580 static const AVFilterPad ssim_outputs[] = {
581 {
582 .name = "default",
583 .type = AVMEDIA_TYPE_VIDEO,
584 .config_props = config_output,
585 },
586 };
587
588 const FFFilter ff_vf_ssim = {
589 .p.name = "ssim",
590 .p.description = NULL_IF_CONFIG_SMALL("Calculate the SSIM between two video streams."),
591 .p.priv_class = &ssim_class,
592 .p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
593 AVFILTER_FLAG_SLICE_THREADS |
594 AVFILTER_FLAG_METADATA_ONLY,
595 .preinit = ssim_framesync_preinit,
596 .init = init,
597 .uninit = uninit,
598 .activate = activate,
599 .priv_size = sizeof(SSIMContext),
600 FILTER_INPUTS(ssim_inputs),
601 FILTER_OUTPUTS(ssim_outputs),
602 FILTER_PIXFMTS_ARRAY(pix_fmts),
603 };
604