1 /*
2 * Copyright (c) 2016 Clément Bœsch <u pkh me>
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 * @todo
23 * - better automatic defaults? see "Parameters" @ http://www.ipol.im/pub/art/2011/bcm_nlm/
24 * - temporal support (probably doesn't need any displacement according to
25 * "Denoising image sequences does not require motion estimation")
26 * - Bayer pixel format support for at least raw photos? (DNG support would be
27 * handy here)
28 * - FATE test (probably needs visual threshold test mechanism due to the use
29 * of floats)
30 */
31
32 #include "libavutil/avassert.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/pixdesc.h"
35 #include "avfilter.h"
36 #include "formats.h"
37 #include "internal.h"
38 #include "vf_nlmeans.h"
39 #include "video.h"
40
41 struct weighted_avg {
42 float total_weight;
43 float sum;
44 };
45
46 typedef struct NLMeansContext {
47 const AVClass *class;
48 int nb_planes;
49 int chroma_w, chroma_h;
50 double pdiff_scale; // invert of the filtering parameter (sigma*10) squared
51 double sigma; // denoising strength
52 int patch_size, patch_hsize; // patch size and half size
53 int patch_size_uv, patch_hsize_uv; // patch size and half size for chroma planes
54 int research_size, research_hsize; // research size and half size
55 int research_size_uv, research_hsize_uv; // research size and half size for chroma planes
56 uint32_t *ii_orig; // integral image
57 uint32_t *ii; // integral image starting after the 0-line and 0-column
58 int ii_w, ii_h; // width and height of the integral image
59 ptrdiff_t ii_lz_32; // linesize in 32-bit units of the integral image
60 struct weighted_avg *wa; // weighted average of every pixel
61 ptrdiff_t wa_linesize; // linesize for wa in struct size unit
62 float *weight_lut; // lookup table mapping (scaled) patch differences to their associated weights
63 uint32_t max_meaningful_diff; // maximum difference considered (if the patch difference is too high we ignore the pixel)
64 NLMeansDSPContext dsp;
65 } NLMeansContext;
66
67 #define OFFSET(x) offsetof(NLMeansContext, x)
68 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
69 static const AVOption nlmeans_options[] = {
70 { "s", "denoising strength", OFFSET(sigma), AV_OPT_TYPE_DOUBLE, { .dbl = 1.0 }, 1.0, 30.0, FLAGS },
71 { "p", "patch size", OFFSET(patch_size), AV_OPT_TYPE_INT, { .i64 = 3*2+1 }, 0, 99, FLAGS },
72 { "pc", "patch size for chroma planes", OFFSET(patch_size_uv), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 99, FLAGS },
73 { "r", "research window", OFFSET(research_size), AV_OPT_TYPE_INT, { .i64 = 7*2+1 }, 0, 99, FLAGS },
74 { "rc", "research window for chroma planes", OFFSET(research_size_uv), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 99, FLAGS },
75 { NULL }
76 };
77
78 AVFILTER_DEFINE_CLASS(nlmeans);
79
query_formats(AVFilterContext * ctx)80 static int query_formats(AVFilterContext *ctx)
81 {
82 static const enum AVPixelFormat pix_fmts[] = {
83 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
84 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
85 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
86 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
87 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
88 AV_PIX_FMT_YUVJ411P,
89 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GBRP,
90 AV_PIX_FMT_NONE
91 };
92
93 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
94 if (!fmts_list)
95 return AVERROR(ENOMEM);
96 return ff_set_common_formats(ctx, fmts_list);
97 }
98
99 /**
100 * Compute squared difference of the safe area (the zone where s1 and s2
101 * overlap). It is likely the largest integral zone, so it is interesting to do
102 * as little checks as possible; contrary to the unsafe version of this
103 * function, we do not need any clipping here.
104 *
105 * The line above dst and the column to its left are always readable.
106 */
compute_safe_ssd_integral_image_c(uint32_t * dst,ptrdiff_t dst_linesize_32,const uint8_t * s1,ptrdiff_t linesize1,const uint8_t * s2,ptrdiff_t linesize2,int w,int h)107 static void compute_safe_ssd_integral_image_c(uint32_t *dst, ptrdiff_t dst_linesize_32,
108 const uint8_t *s1, ptrdiff_t linesize1,
109 const uint8_t *s2, ptrdiff_t linesize2,
110 int w, int h)
111 {
112 int x, y;
113 const uint32_t *dst_top = dst - dst_linesize_32;
114
115 /* SIMD-friendly assumptions allowed here */
116 av_assert2(!(w & 0xf) && w >= 16 && h >= 1);
117
118 for (y = 0; y < h; y++) {
119 for (x = 0; x < w; x += 4) {
120 const int d0 = s1[x ] - s2[x ];
121 const int d1 = s1[x + 1] - s2[x + 1];
122 const int d2 = s1[x + 2] - s2[x + 2];
123 const int d3 = s1[x + 3] - s2[x + 3];
124
125 dst[x ] = dst_top[x ] - dst_top[x - 1] + d0*d0;
126 dst[x + 1] = dst_top[x + 1] - dst_top[x ] + d1*d1;
127 dst[x + 2] = dst_top[x + 2] - dst_top[x + 1] + d2*d2;
128 dst[x + 3] = dst_top[x + 3] - dst_top[x + 2] + d3*d3;
129
130 dst[x ] += dst[x - 1];
131 dst[x + 1] += dst[x ];
132 dst[x + 2] += dst[x + 1];
133 dst[x + 3] += dst[x + 2];
134 }
135 s1 += linesize1;
136 s2 += linesize2;
137 dst += dst_linesize_32;
138 dst_top += dst_linesize_32;
139 }
140 }
141
142 /**
143 * Compute squared difference of an unsafe area (the zone nor s1 nor s2 could
144 * be readable).
145 *
146 * On the other hand, the line above dst and the column to its left are always
147 * readable.
148 *
149 * There is little point in having this function SIMDified as it is likely too
150 * complex and only handle small portions of the image.
151 *
152 * @param dst integral image
153 * @param dst_linesize_32 integral image linesize (in 32-bit integers unit)
154 * @param startx integral starting x position
155 * @param starty integral starting y position
156 * @param src source plane buffer
157 * @param linesize source plane linesize
158 * @param offx source offsetting in x
159 * @param offy source offsetting in y
160 * @paran r absolute maximum source offsetting
161 * @param sw source width
162 * @param sh source height
163 * @param w width to compute
164 * @param h height to compute
165 */
compute_unsafe_ssd_integral_image(uint32_t * dst,ptrdiff_t dst_linesize_32,int startx,int starty,const uint8_t * src,ptrdiff_t linesize,int offx,int offy,int r,int sw,int sh,int w,int h)166 static inline void compute_unsafe_ssd_integral_image(uint32_t *dst, ptrdiff_t dst_linesize_32,
167 int startx, int starty,
168 const uint8_t *src, ptrdiff_t linesize,
169 int offx, int offy, int r, int sw, int sh,
170 int w, int h)
171 {
172 int x, y;
173
174 for (y = starty; y < starty + h; y++) {
175 uint32_t acc = dst[y*dst_linesize_32 + startx - 1] - dst[(y-1)*dst_linesize_32 + startx - 1];
176 const int s1y = av_clip(y - r, 0, sh - 1);
177 const int s2y = av_clip(y - (r + offy), 0, sh - 1);
178
179 for (x = startx; x < startx + w; x++) {
180 const int s1x = av_clip(x - r, 0, sw - 1);
181 const int s2x = av_clip(x - (r + offx), 0, sw - 1);
182 const uint8_t v1 = src[s1y*linesize + s1x];
183 const uint8_t v2 = src[s2y*linesize + s2x];
184 const int d = v1 - v2;
185 acc += d * d;
186 dst[y*dst_linesize_32 + x] = dst[(y-1)*dst_linesize_32 + x] + acc;
187 }
188 }
189 }
190
191 /*
192 * Compute the sum of squared difference integral image
193 * http://www.ipol.im/pub/art/2014/57/
194 * Integral Images for Block Matching - Gabriele Facciolo, Nicolas Limare, Enric Meinhardt-Llopis
195 *
196 * @param ii integral image of dimension (w+e*2) x (h+e*2) with
197 * an additional zeroed top line and column already
198 * "applied" to the pointer value
199 * @param ii_linesize_32 integral image linesize (in 32-bit integers unit)
200 * @param src source plane buffer
201 * @param linesize source plane linesize
202 * @param offx x-offsetting ranging in [-e;e]
203 * @param offy y-offsetting ranging in [-e;e]
204 * @param w source width
205 * @param h source height
206 * @param e research padding edge
207 */
compute_ssd_integral_image(const NLMeansDSPContext * dsp,uint32_t * ii,ptrdiff_t ii_linesize_32,const uint8_t * src,ptrdiff_t linesize,int offx,int offy,int e,int w,int h)208 static void compute_ssd_integral_image(const NLMeansDSPContext *dsp,
209 uint32_t *ii, ptrdiff_t ii_linesize_32,
210 const uint8_t *src, ptrdiff_t linesize, int offx, int offy,
211 int e, int w, int h)
212 {
213 // ii has a surrounding padding of thickness "e"
214 const int ii_w = w + e*2;
215 const int ii_h = h + e*2;
216
217 // we center the first source
218 const int s1x = e;
219 const int s1y = e;
220
221 // 2nd source is the frame with offsetting
222 const int s2x = e + offx;
223 const int s2y = e + offy;
224
225 // get the dimension of the overlapping rectangle where it is always safe
226 // to compare the 2 sources pixels
227 const int startx_safe = FFMAX(s1x, s2x);
228 const int starty_safe = FFMAX(s1y, s2y);
229 const int u_endx_safe = FFMIN(s1x + w, s2x + w); // unaligned
230 const int endy_safe = FFMIN(s1y + h, s2y + h);
231
232 // deduce the safe area width and height
233 const int safe_pw = (u_endx_safe - startx_safe) & ~0xf;
234 const int safe_ph = endy_safe - starty_safe;
235
236 // adjusted end x position of the safe area after width of the safe area gets aligned
237 const int endx_safe = startx_safe + safe_pw;
238
239 // top part where only one of s1 and s2 is still readable, or none at all
240 compute_unsafe_ssd_integral_image(ii, ii_linesize_32,
241 0, 0,
242 src, linesize,
243 offx, offy, e, w, h,
244 ii_w, starty_safe);
245
246 // fill the left column integral required to compute the central
247 // overlapping one
248 compute_unsafe_ssd_integral_image(ii, ii_linesize_32,
249 0, starty_safe,
250 src, linesize,
251 offx, offy, e, w, h,
252 startx_safe, safe_ph);
253
254 // main and safe part of the integral
255 av_assert1(startx_safe - s1x >= 0); av_assert1(startx_safe - s1x < w);
256 av_assert1(starty_safe - s1y >= 0); av_assert1(starty_safe - s1y < h);
257 av_assert1(startx_safe - s2x >= 0); av_assert1(startx_safe - s2x < w);
258 av_assert1(starty_safe - s2y >= 0); av_assert1(starty_safe - s2y < h);
259 if (safe_pw && safe_ph)
260 dsp->compute_safe_ssd_integral_image(ii + starty_safe*ii_linesize_32 + startx_safe, ii_linesize_32,
261 src + (starty_safe - s1y) * linesize + (startx_safe - s1x), linesize,
262 src + (starty_safe - s2y) * linesize + (startx_safe - s2x), linesize,
263 safe_pw, safe_ph);
264
265 // right part of the integral
266 compute_unsafe_ssd_integral_image(ii, ii_linesize_32,
267 endx_safe, starty_safe,
268 src, linesize,
269 offx, offy, e, w, h,
270 ii_w - endx_safe, safe_ph);
271
272 // bottom part where only one of s1 and s2 is still readable, or none at all
273 compute_unsafe_ssd_integral_image(ii, ii_linesize_32,
274 0, endy_safe,
275 src, linesize,
276 offx, offy, e, w, h,
277 ii_w, ii_h - endy_safe);
278 }
279
config_input(AVFilterLink * inlink)280 static int config_input(AVFilterLink *inlink)
281 {
282 AVFilterContext *ctx = inlink->dst;
283 NLMeansContext *s = ctx->priv;
284 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
285 const int e = FFMAX(s->research_hsize, s->research_hsize_uv)
286 + FFMAX(s->patch_hsize, s->patch_hsize_uv);
287
288 s->chroma_w = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
289 s->chroma_h = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
290 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
291
292 /* Allocate the integral image with extra edges of thickness "e"
293 *
294 * +_+-------------------------------+
295 * |0|0000000000000000000000000000000|
296 * +-x-------------------------------+
297 * |0|\ ^ |
298 * |0| ii | e |
299 * |0| v |
300 * |0| +-----------------------+ |
301 * |0| | | |
302 * |0|<->| | |
303 * |0| e | | |
304 * |0| | | |
305 * |0| +-----------------------+ |
306 * |0| |
307 * |0| |
308 * |0| |
309 * +-+-------------------------------+
310 */
311 s->ii_w = inlink->w + e*2;
312 s->ii_h = inlink->h + e*2;
313
314 // align to 4 the linesize, "+1" is for the space of the left 0-column
315 s->ii_lz_32 = FFALIGN(s->ii_w + 1, 4);
316
317 // "+1" is for the space of the top 0-line
318 s->ii_orig = av_mallocz_array(s->ii_h + 1, s->ii_lz_32 * sizeof(*s->ii_orig));
319 if (!s->ii_orig)
320 return AVERROR(ENOMEM);
321
322 // skip top 0-line and left 0-column
323 s->ii = s->ii_orig + s->ii_lz_32 + 1;
324
325 // allocate weighted average for every pixel
326 s->wa_linesize = inlink->w;
327 s->wa = av_malloc_array(s->wa_linesize, inlink->h * sizeof(*s->wa));
328 if (!s->wa)
329 return AVERROR(ENOMEM);
330
331 return 0;
332 }
333
334 struct thread_data {
335 const uint8_t *src;
336 ptrdiff_t src_linesize;
337 int startx, starty;
338 int endx, endy;
339 const uint32_t *ii_start;
340 int p;
341 };
342
nlmeans_slice(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)343 static int nlmeans_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
344 {
345 int x, y;
346 NLMeansContext *s = ctx->priv;
347 const struct thread_data *td = arg;
348 const ptrdiff_t src_linesize = td->src_linesize;
349 const int process_h = td->endy - td->starty;
350 const int slice_start = (process_h * jobnr ) / nb_jobs;
351 const int slice_end = (process_h * (jobnr+1)) / nb_jobs;
352 const int starty = td->starty + slice_start;
353 const int endy = td->starty + slice_end;
354 const int p = td->p;
355 const uint32_t *ii = td->ii_start + (starty - p - 1) * s->ii_lz_32 - p - 1;
356 const int dist_b = 2*p + 1;
357 const int dist_d = dist_b * s->ii_lz_32;
358 const int dist_e = dist_d + dist_b;
359
360 for (y = starty; y < endy; y++) {
361 const uint8_t *src = td->src + y*src_linesize;
362 struct weighted_avg *wa = s->wa + y*s->wa_linesize;
363 for (x = td->startx; x < td->endx; x++) {
364 /*
365 * M is a discrete map where every entry contains the sum of all the entries
366 * in the rectangle from the top-left origin of M to its coordinate. In the
367 * following schema, "i" contains the sum of the whole map:
368 *
369 * M = +----------+-----------------+----+
370 * | | | |
371 * | | | |
372 * | a| b| c|
373 * +----------+-----------------+----+
374 * | | | |
375 * | | | |
376 * | | X | |
377 * | | | |
378 * | d| e| f|
379 * +----------+-----------------+----+
380 * | | | |
381 * | g| h| i|
382 * +----------+-----------------+----+
383 *
384 * The sum of the X box can be calculated with:
385 * X = e-d-b+a
386 *
387 * See https://en.wikipedia.org/wiki/Summed_area_table
388 *
389 * The compute*_ssd functions compute the integral image M where every entry
390 * contains the sum of the squared difference of every corresponding pixels of
391 * two input planes of the same size as M.
392 */
393 const uint32_t a = ii[x];
394 const uint32_t b = ii[x + dist_b];
395 const uint32_t d = ii[x + dist_d];
396 const uint32_t e = ii[x + dist_e];
397 const uint32_t patch_diff_sq = e - d - b + a;
398
399 if (patch_diff_sq < s->max_meaningful_diff) {
400 const float weight = s->weight_lut[patch_diff_sq]; // exp(-patch_diff_sq * s->pdiff_scale)
401 wa[x].total_weight += weight;
402 wa[x].sum += weight * src[x];
403 }
404 }
405 ii += s->ii_lz_32;
406 }
407 return 0;
408 }
409
weight_averages(uint8_t * dst,ptrdiff_t dst_linesize,const uint8_t * src,ptrdiff_t src_linesize,struct weighted_avg * wa,ptrdiff_t wa_linesize,int w,int h)410 static void weight_averages(uint8_t *dst, ptrdiff_t dst_linesize,
411 const uint8_t *src, ptrdiff_t src_linesize,
412 struct weighted_avg *wa, ptrdiff_t wa_linesize,
413 int w, int h)
414 {
415 int x, y;
416
417 for (y = 0; y < h; y++) {
418 for (x = 0; x < w; x++) {
419 // Also weight the centered pixel
420 wa[x].total_weight += 1.f;
421 wa[x].sum += 1.f * src[x];
422 dst[x] = av_clip_uint8(wa[x].sum / wa[x].total_weight + 0.5f);
423 }
424 dst += dst_linesize;
425 src += src_linesize;
426 wa += wa_linesize;
427 }
428 }
429
nlmeans_plane(AVFilterContext * ctx,int w,int h,int p,int r,uint8_t * dst,ptrdiff_t dst_linesize,const uint8_t * src,ptrdiff_t src_linesize)430 static int nlmeans_plane(AVFilterContext *ctx, int w, int h, int p, int r,
431 uint8_t *dst, ptrdiff_t dst_linesize,
432 const uint8_t *src, ptrdiff_t src_linesize)
433 {
434 int offx, offy;
435 NLMeansContext *s = ctx->priv;
436 /* patches center points cover the whole research window so the patches
437 * themselves overflow the research window */
438 const int e = r + p;
439 /* focus an integral pointer on the centered image (s1) */
440 const uint32_t *centered_ii = s->ii + e*s->ii_lz_32 + e;
441
442 memset(s->wa, 0, s->wa_linesize * h * sizeof(*s->wa));
443
444 for (offy = -r; offy <= r; offy++) {
445 for (offx = -r; offx <= r; offx++) {
446 if (offx || offy) {
447 struct thread_data td = {
448 .src = src + offy*src_linesize + offx,
449 .src_linesize = src_linesize,
450 .startx = FFMAX(0, -offx),
451 .starty = FFMAX(0, -offy),
452 .endx = FFMIN(w, w - offx),
453 .endy = FFMIN(h, h - offy),
454 .ii_start = centered_ii + offy*s->ii_lz_32 + offx,
455 .p = p,
456 };
457
458 compute_ssd_integral_image(&s->dsp, s->ii, s->ii_lz_32,
459 src, src_linesize,
460 offx, offy, e, w, h);
461 ctx->internal->execute(ctx, nlmeans_slice, &td, NULL,
462 FFMIN(td.endy - td.starty, ff_filter_get_nb_threads(ctx)));
463 }
464 }
465 }
466
467 weight_averages(dst, dst_linesize, src, src_linesize,
468 s->wa, s->wa_linesize, w, h);
469
470 return 0;
471 }
472
filter_frame(AVFilterLink * inlink,AVFrame * in)473 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
474 {
475 int i;
476 AVFilterContext *ctx = inlink->dst;
477 NLMeansContext *s = ctx->priv;
478 AVFilterLink *outlink = ctx->outputs[0];
479
480 AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
481 if (!out) {
482 av_frame_free(&in);
483 return AVERROR(ENOMEM);
484 }
485 av_frame_copy_props(out, in);
486
487 for (i = 0; i < s->nb_planes; i++) {
488 const int w = i ? s->chroma_w : inlink->w;
489 const int h = i ? s->chroma_h : inlink->h;
490 const int p = i ? s->patch_hsize_uv : s->patch_hsize;
491 const int r = i ? s->research_hsize_uv : s->research_hsize;
492 nlmeans_plane(ctx, w, h, p, r,
493 out->data[i], out->linesize[i],
494 in->data[i], in->linesize[i]);
495 }
496
497 av_frame_free(&in);
498 return ff_filter_frame(outlink, out);
499 }
500
501 #define CHECK_ODD_FIELD(field, name) do { \
502 if (!(s->field & 1)) { \
503 s->field |= 1; \
504 av_log(ctx, AV_LOG_WARNING, name " size must be odd, " \
505 "setting it to %d\n", s->field); \
506 } \
507 } while (0)
508
ff_nlmeans_init(NLMeansDSPContext * dsp)509 void ff_nlmeans_init(NLMeansDSPContext *dsp)
510 {
511 dsp->compute_safe_ssd_integral_image = compute_safe_ssd_integral_image_c;
512
513 if (ARCH_AARCH64)
514 ff_nlmeans_init_aarch64(dsp);
515 }
516
init(AVFilterContext * ctx)517 static av_cold int init(AVFilterContext *ctx)
518 {
519 int i;
520 NLMeansContext *s = ctx->priv;
521 const double h = s->sigma * 10.;
522
523 s->pdiff_scale = 1. / (h * h);
524 s->max_meaningful_diff = log(255.) / s->pdiff_scale;
525 s->weight_lut = av_calloc(s->max_meaningful_diff, sizeof(*s->weight_lut));
526 if (!s->weight_lut)
527 return AVERROR(ENOMEM);
528 for (i = 0; i < s->max_meaningful_diff; i++)
529 s->weight_lut[i] = exp(-i * s->pdiff_scale);
530
531 CHECK_ODD_FIELD(research_size, "Luma research window");
532 CHECK_ODD_FIELD(patch_size, "Luma patch");
533
534 if (!s->research_size_uv) s->research_size_uv = s->research_size;
535 if (!s->patch_size_uv) s->patch_size_uv = s->patch_size;
536
537 CHECK_ODD_FIELD(research_size_uv, "Chroma research window");
538 CHECK_ODD_FIELD(patch_size_uv, "Chroma patch");
539
540 s->research_hsize = s->research_size / 2;
541 s->research_hsize_uv = s->research_size_uv / 2;
542 s->patch_hsize = s->patch_size / 2;
543 s->patch_hsize_uv = s->patch_size_uv / 2;
544
545 av_log(ctx, AV_LOG_INFO, "Research window: %dx%d / %dx%d, patch size: %dx%d / %dx%d\n",
546 s->research_size, s->research_size, s->research_size_uv, s->research_size_uv,
547 s->patch_size, s->patch_size, s->patch_size_uv, s->patch_size_uv);
548
549 ff_nlmeans_init(&s->dsp);
550
551 return 0;
552 }
553
uninit(AVFilterContext * ctx)554 static av_cold void uninit(AVFilterContext *ctx)
555 {
556 NLMeansContext *s = ctx->priv;
557 av_freep(&s->weight_lut);
558 av_freep(&s->ii_orig);
559 av_freep(&s->wa);
560 }
561
562 static const AVFilterPad nlmeans_inputs[] = {
563 {
564 .name = "default",
565 .type = AVMEDIA_TYPE_VIDEO,
566 .config_props = config_input,
567 .filter_frame = filter_frame,
568 },
569 { NULL }
570 };
571
572 static const AVFilterPad nlmeans_outputs[] = {
573 {
574 .name = "default",
575 .type = AVMEDIA_TYPE_VIDEO,
576 },
577 { NULL }
578 };
579
580 AVFilter ff_vf_nlmeans = {
581 .name = "nlmeans",
582 .description = NULL_IF_CONFIG_SMALL("Non-local means denoiser."),
583 .priv_size = sizeof(NLMeansContext),
584 .init = init,
585 .uninit = uninit,
586 .query_formats = query_formats,
587 .inputs = nlmeans_inputs,
588 .outputs = nlmeans_outputs,
589 .priv_class = &nlmeans_class,
590 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
591 };
592