FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* This file is part of FFmpeg.
3			*
4			* FFmpeg is free software; you can redistribute it and/or
5			* modify it under the terms of the GNU Lesser General Public
6			* License as published by the Free Software Foundation; either
7			* version 2.1 of the License, or (at your option) any later version.
8			*
9			* FFmpeg is distributed in the hope that it will be useful,
10			* but WITHOUT ANY WARRANTY; without even the implied warranty of
11			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12			* Lesser General Public License for more details.
13			*
14			* You should have received a copy of the GNU Lesser General Public
15			* License along with FFmpeg; if not, write to the Free Software
16			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17			*/
18
19			#include <float.h>
20
21			#include "libavutil/common.h"
22			#include "libavutil/imgutils.h"
23			#include "libavutil/mem.h"
24			#include "libavutil/opt.h"
25			#include "libavutil/pixdesc.h"
26			#include "libavutil/tx.h"
27
28			#include "filters.h"
29			#include "video.h"
30			#include "window_func.h"
31
32			#define MAX_BLOCK 256
33			#define MAX_THREADS 32
34
35			enum BufferTypes {
36			CURRENT,
37			PREV,
38			NEXT,
39			BSIZE
40			};
41
42			typedef struct PlaneContext {
43			int planewidth, planeheight;
44			int nox, noy;
45			int b;
46			int o;
47			float n;
48
49			float *buffer[MAX_THREADS][BSIZE];
50			AVComplexFloat *hdata[MAX_THREADS], *vdata[MAX_THREADS];
51			AVComplexFloat *hdata_out[MAX_THREADS], *vdata_out[MAX_THREADS];
52			int data_linesize;
53			int buffer_linesize;
54			} PlaneContext;
55
56			typedef struct FFTdnoizContext {
57			const AVClass *class;
58
59			float sigma;
60			float amount;
61			int block_size;
62			float overlap;
63			int method;
64			int window;
65			int nb_prev;
66			int nb_next;
67			int planesf;
68
69			AVFrame *prev, *cur, *next;
70
71			int depth;
72			int nb_planes;
73			int nb_threads;
74			PlaneContext planes[4];
75			float win[MAX_BLOCK][MAX_BLOCK];
76
77			AVTXContext *fft[MAX_THREADS], *ifft[MAX_THREADS];
78			AVTXContext *fft_r[MAX_THREADS], *ifft_r[MAX_THREADS];
79
80			av_tx_fn tx_fn, itx_fn;
81			av_tx_fn tx_r_fn, itx_r_fn;
82
83			void (*import_row)(AVComplexFloat *dst, uint8_t *src, int rw, float scale, float *win, int off);
84			void (*export_row)(AVComplexFloat *src, uint8_t *dst, int rw, int depth, float *win);
85			} FFTdnoizContext;
86
87			#define OFFSET(x) offsetof(FFTdnoizContext, x)
88			#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
89			#define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
90			static const AVOption fftdnoiz_options[] = {
91			{ "sigma", "set denoise strength",
92			OFFSET(sigma), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 100, .flags = TFLAGS },
93			{ "amount", "set amount of denoising",
94			OFFSET(amount), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0.01, 1, .flags = TFLAGS },
95			{ "block", "set block size",
96			OFFSET(block_size), AV_OPT_TYPE_INT, {.i64=32}, 8, MAX_BLOCK, .flags = FLAGS },
97			{ "overlap", "set block overlap",
98			OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0.2, 0.8, .flags = FLAGS },
99			{ "method", "set method of denoising",
100			OFFSET(method), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, .flags = TFLAGS, .unit = "method" },
101			{ "wiener", "wiener method",
102			0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, .flags = TFLAGS, .unit = "method" },
103			{ "hard", "hard thresholding",
104			0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, .flags = TFLAGS, .unit = "method" },
105			{ "prev", "set number of previous frames for temporal denoising",
106			OFFSET(nb_prev), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, .flags = FLAGS },
107			{ "next", "set number of next frames for temporal denoising",
108			OFFSET(nb_next), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, .flags = FLAGS },
109			{ "planes", "set planes to filter",
110			OFFSET(planesf), AV_OPT_TYPE_INT, {.i64=7}, 0, 15, .flags = TFLAGS },
111			WIN_FUNC_OPTION("window", OFFSET(window), FLAGS, WFUNC_HANNING),
112			{ NULL }
113			};
114
115			AVFILTER_DEFINE_CLASS(fftdnoiz);
116
117			static const enum AVPixelFormat pix_fmts[] = {
118			AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9,
119			AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12,
120			AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
121			AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
122			AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
123			AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
124			AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
125			AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
126			AV_PIX_FMT_YUVJ411P,
127			AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
128			AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
129			AV_PIX_FMT_YUV440P10,
130			AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
131			AV_PIX_FMT_YUV440P12,
132			AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
133			AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
134			AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
135			AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
136			AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
137			AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
138			AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
139			AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
140			AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
141			AV_PIX_FMT_NONE
142			};
143
144			typedef struct ThreadData {
145			float *src, *dst;
146			} ThreadData;
147
148		✗	static void import_row8(AVComplexFloat *dst, uint8_t *src, int rw,
149			float scale, float *win, int off)
150			{
151		✗	for (int j = 0; j < rw; j++) {
152		✗	const int i = abs(j + off);
153		✗	dst[j].re = src[i] * scale * win[j];
154		✗	dst[j].im = 0.f;
155			}
156		✗	}
157
158		✗	static void export_row8(AVComplexFloat *src, uint8_t *dst, int rw, int depth, float *win)
159			{
160		✗	for (int j = 0; j < rw; j++)
161		✗	dst[j] = av_clip_uint8(lrintf(src[j].re / win[j]));
162		✗	}
163
164		✗	static void import_row16(AVComplexFloat *dst, uint8_t *srcp, int rw,
165			float scale, float *win, int off)
166			{
167		✗	uint16_t *src = (uint16_t *)srcp;
168
169		✗	for (int j = 0; j < rw; j++) {
170		✗	const int i = abs(j + off);
171		✗	dst[j].re = src[i] * scale * win[j];
172		✗	dst[j].im = 0;
173			}
174		✗	}
175
176		✗	static void export_row16(AVComplexFloat *src, uint8_t *dstp, int rw, int depth, float *win)
177			{
178		✗	uint16_t *dst = (uint16_t *)dstp;
179
180		✗	for (int j = 0; j < rw; j++)
181		✗	dst[j] = av_clip_uintp2_c(lrintf(src[j].re / win[j]), depth);
182		✗	}
183
184		✗	static int config_input(AVFilterLink *inlink)
185			{
186		✗	AVFilterContext *ctx = inlink->dst;
187			const AVPixFmtDescriptor *desc;
188		✗	FFTdnoizContext *s = ctx->priv;
189			float lut[MAX_BLOCK + 1];
190			float overlap;
191			int i;
192
193		✗	desc = av_pix_fmt_desc_get(inlink->format);
194		✗	s->depth = desc->comp[0].depth;
195
196		✗	if (s->depth <= 8) {
197		✗	s->import_row = import_row8;
198		✗	s->export_row = export_row8;
199			} else {
200		✗	s->import_row = import_row16;
201		✗	s->export_row = export_row16;
202			}
203
204		✗	s->planes[1].planewidth = s->planes[2].planewidth = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
205		✗	s->planes[0].planewidth = s->planes[3].planewidth = inlink->w;
206		✗	s->planes[1].planeheight = s->planes[2].planeheight = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
207		✗	s->planes[0].planeheight = s->planes[3].planeheight = inlink->h;
208
209		✗	s->nb_planes = av_pix_fmt_count_planes(inlink->format);
210		✗	s->nb_threads = FFMIN(ff_filter_get_nb_threads(ctx), MAX_THREADS);
211
212		✗	for (int i = 0; i < s->nb_threads; i++) {
213		✗	float scale = 1.f, iscale = 1.f;
214			int ret;
215
216		✗	if ((ret = av_tx_init(&s->fft[i], &s->tx_fn, AV_TX_FLOAT_FFT,
217		✗	0, s->block_size, &scale, 0)) < 0 ||
218		✗	(ret = av_tx_init(&s->ifft[i], &s->itx_fn, AV_TX_FLOAT_FFT,
219		✗	1, s->block_size, &iscale, 0)) < 0 ||
220		✗	(ret = av_tx_init(&s->fft_r[i], &s->tx_r_fn, AV_TX_FLOAT_FFT,
221		✗	0, 1 + s->nb_prev + s->nb_next, &scale, 0)) < 0 ||
222		✗	(ret = av_tx_init(&s->ifft_r[i], &s->itx_r_fn, AV_TX_FLOAT_FFT,
223		✗	1, 1 + s->nb_prev + s->nb_next, &iscale, 0)) < 0)
224		✗	return ret;
225			}
226
227		✗	for (i = 0; i < s->nb_planes; i++) {
228		✗	PlaneContext *p = &s->planes[i];
229			int size;
230
231		✗	p->b = s->block_size;
232		✗	p->n = 1.f / (p->b * p->b);
233		✗	p->o = lrintf(p->b * s->overlap);
234		✗	size = p->b - p->o;
235		✗	p->nox = (p->planewidth + (size - 1)) / size;
236		✗	p->noy = (p->planeheight + (size - 1)) / size;
237
238		✗	av_log(ctx, AV_LOG_DEBUG, "nox:%d noy:%d size:%d\n", p->nox, p->noy, size);
239
240		✗	p->buffer_linesize = p->b * sizeof(AVComplexFloat);
241		✗	p->data_linesize = 2 * p->b * sizeof(float);
242		✗	for (int j = 0; j < s->nb_threads; j++) {
243		✗	p->hdata[j] = av_calloc(p->b, p->data_linesize);
244		✗	p->hdata_out[j] = av_calloc(p->b, p->data_linesize);
245		✗	p->vdata[j] = av_calloc(p->b, p->data_linesize);
246		✗	p->vdata_out[j] = av_calloc(p->b, p->data_linesize);
247		✗	p->buffer[j][CURRENT] = av_calloc(p->b, p->buffer_linesize);
248		✗	if (!p->buffer[j][CURRENT])
249		✗	return AVERROR(ENOMEM);
250		✗	if (s->nb_prev > 0) {
251		✗	p->buffer[j][PREV] = av_calloc(p->b, p->buffer_linesize);
252		✗	if (!p->buffer[j][PREV])
253		✗	return AVERROR(ENOMEM);
254			}
255		✗	if (s->nb_next > 0) {
256		✗	p->buffer[j][NEXT] = av_calloc(p->b, p->buffer_linesize);
257		✗	if (!p->buffer[j][NEXT])
258		✗	return AVERROR(ENOMEM);
259			}
260		✗	if (!p->hdata[j] || !p->vdata[j] ||
261		✗	!p->hdata_out[j] || !p->vdata_out[j])
262		✗	return AVERROR(ENOMEM);
263			}
264			}
265
266		✗	generate_window_func(lut, s->block_size + 1, s->window, &overlap);
267
268		✗	for (int y = 0; y < s->block_size; y++) {
269		✗	for (int x = 0; x < s->block_size; x++)
270		✗	s->win[y][x] = lut[y] * lut[x];
271			}
272
273		✗	return 0;
274			}
275
276		✗	static void import_block(FFTdnoizContext *s,
277			uint8_t *srcp, int src_linesize,
278			float *buffer, int buffer_linesize, int plane,
279			int jobnr, int y, int x)
280			{
281		✗	PlaneContext *p = &s->planes[plane];
282		✗	const int width = p->planewidth;
283		✗	const int height = p->planeheight;
284		✗	const int block = p->b;
285		✗	const int overlap = p->o;
286		✗	const int hoverlap = overlap / 2;
287		✗	const int size = block - overlap;
288		✗	const int bpp = (s->depth + 7) / 8;
289		✗	const int data_linesize = p->data_linesize / sizeof(AVComplexFloat);
290		✗	const float scale = 1.f / ((1.f + s->nb_prev + s->nb_next) * s->block_size * s->block_size);
291		✗	AVComplexFloat *hdata = p->hdata[jobnr];
292		✗	AVComplexFloat *hdata_out = p->hdata_out[jobnr];
293		✗	AVComplexFloat *vdata_out = p->vdata_out[jobnr];
294		✗	const int woff = -hoverlap;
295		✗	const int hoff = -hoverlap;
296		✗	const int rh = FFMIN(block, height - y * size + hoverlap);
297		✗	const int rw = FFMIN(block, width - x * size + hoverlap);
298		✗	AVComplexFloat *ssrc, *ddst, *dst = hdata, *dst_out = hdata_out;
299		✗	float *bdst = buffer;
300
301		✗	buffer_linesize /= sizeof(float);
302
303		✗	for (int i = 0; i < rh; i++) {
304		✗	uint8_t *src = srcp + src_linesize * abs(y * size + i + hoff) + x * size * bpp;
305
306		✗	s->import_row(dst, src, rw, scale, s->win[i], woff);
307		✗	for (int j = rw; j < block; j++) {
308		✗	dst[j].re = dst[rw - 1].re;
309		✗	dst[j].im = 0.f;
310			}
311		✗	s->tx_fn(s->fft[jobnr], dst_out, dst, sizeof(AVComplexFloat));
312
313		✗	ddst = dst_out;
314		✗	dst += data_linesize;
315		✗	dst_out += data_linesize;
316			}
317
318		✗	dst = dst_out;
319		✗	for (int i = rh; i < block; i++) {
320		✗	for (int j = 0; j < block; j++) {
321		✗	dst[j].re = ddst[j].re;
322		✗	dst[j].im = ddst[j].im;
323			}
324
325		✗	dst += data_linesize;
326			}
327
328		✗	ssrc = hdata_out;
329		✗	dst = vdata_out;
330		✗	for (int i = 0; i < block; i++) {
331		✗	for (int j = 0; j < block; j++)
332		✗	dst[j] = ssrc[j * data_linesize + i];
333		✗	s->tx_fn(s->fft[jobnr], bdst, dst, sizeof(AVComplexFloat));
334
335		✗	dst += data_linesize;
336		✗	bdst += buffer_linesize;
337			}
338		✗	}
339
340		✗	static void export_block(FFTdnoizContext *s,
341			uint8_t *dstp, int dst_linesize,
342			float *buffer, int buffer_linesize, int plane,
343			int jobnr, int y, int x)
344			{
345		✗	PlaneContext *p = &s->planes[plane];
346		✗	const int depth = s->depth;
347		✗	const int bpp = (depth + 7) / 8;
348		✗	const int width = p->planewidth;
349		✗	const int height = p->planeheight;
350		✗	const int block = p->b;
351		✗	const int overlap = p->o;
352		✗	const int hoverlap = overlap / 2;
353		✗	const int size = block - overlap;
354		✗	const int data_linesize = p->data_linesize / sizeof(AVComplexFloat);
355		✗	AVComplexFloat *hdata = p->hdata[jobnr];
356		✗	AVComplexFloat *hdata_out = p->hdata_out[jobnr];
357		✗	AVComplexFloat *vdata_out = p->vdata_out[jobnr];
358		✗	const int rw = FFMIN(size, width - x * size);
359		✗	const int rh = FFMIN(size, height - y * size);
360		✗	AVComplexFloat *hdst, *vdst = vdata_out, *hdst_out = hdata_out;
361		✗	float *bsrc = buffer;
362
363		✗	hdst = hdata;
364		✗	buffer_linesize /= sizeof(float);
365
366		✗	for (int i = 0; i < block; i++) {
367		✗	s->itx_fn(s->ifft[jobnr], vdst, bsrc, sizeof(AVComplexFloat));
368		✗	for (int j = 0; j < block; j++)
369		✗	hdst[j * data_linesize + i] = vdst[j];
370
371		✗	vdst += data_linesize;
372		✗	bsrc += buffer_linesize;
373			}
374
375		✗	hdst = hdata + hoverlap * data_linesize;
376		✗	for (int i = 0; i < rh && (y * size + i) < height; i++) {
377		✗	uint8_t *dst = dstp + dst_linesize * (y * size + i) + x * size * bpp;
378
379		✗	s->itx_fn(s->ifft[jobnr], hdst_out, hdst, sizeof(AVComplexFloat));
380		✗	s->export_row(hdst_out + hoverlap, dst, rw, depth, s->win[i + hoverlap] + hoverlap);
381
382		✗	hdst += data_linesize;
383		✗	hdst_out += data_linesize;
384			}
385		✗	}
386
387		✗	static void filter_block3d2(FFTdnoizContext *s, int plane, float *pbuffer, float *nbuffer,
388			int jobnr)
389			{
390		✗	PlaneContext *p = &s->planes[plane];
391		✗	const int block = p->b;
392		✗	const int buffer_linesize = p->buffer_linesize / sizeof(float);
393		✗	const float depthx = (1 << (s->depth - 8)) * (1 << (s->depth - 8));
394		✗	const float sigma = s->sigma * depthx / (3.f * s->block_size * s->block_size);
395		✗	const float limit = 1.f - s->amount;
396		✗	float *cbuffer = p->buffer[jobnr][CURRENT];
397		✗	const int method = s->method;
398		✗	float *cbuff = cbuffer;
399		✗	float *pbuff = pbuffer;
400		✗	float *nbuff = nbuffer;
401
402		✗	for (int i = 0; i < block; i++) {
403		✗	for (int j = 0; j < block; j++) {
404			AVComplexFloat buffer[BSIZE];
405			AVComplexFloat outbuffer[BSIZE];
406
407		✗	buffer[0].re = pbuff[2 * j ];
408		✗	buffer[0].im = pbuff[2 * j + 1];
409
410		✗	buffer[1].re = cbuff[2 * j ];
411		✗	buffer[1].im = cbuff[2 * j + 1];
412
413		✗	buffer[2].re = nbuff[2 * j ];
414		✗	buffer[2].im = nbuff[2 * j + 1];
415
416		✗	s->tx_r_fn(s->fft_r[jobnr], outbuffer, buffer, sizeof(AVComplexFloat));
417
418		✗	for (int z = 0; z < 3; z++) {
419		✗	const float re = outbuffer[z].re;
420		✗	const float im = outbuffer[z].im;
421		✗	const float power = re * re + im * im;
422			float factor;
423
424		✗	switch (method) {
425		✗	case 0:
426		✗	factor = fmaxf(limit, (power - sigma) / (power + 1e-15f));
427		✗	break;
428		✗	case 1:
429		✗	factor = power < sigma ? limit : 1.f;
430		✗	break;
431			}
432
433		✗	outbuffer[z].re *= factor;
434		✗	outbuffer[z].im *= factor;
435			}
436
437		✗	s->itx_r_fn(s->ifft_r[jobnr], buffer, outbuffer, sizeof(AVComplexFloat));
438
439		✗	cbuff[2 * j + 0] = buffer[1].re;
440		✗	cbuff[2 * j + 1] = buffer[1].im;
441			}
442
443		✗	cbuff += buffer_linesize;
444		✗	pbuff += buffer_linesize;
445		✗	nbuff += buffer_linesize;
446			}
447		✗	}
448
449		✗	static void filter_block3d1(FFTdnoizContext *s, int plane, float *pbuffer,
450			int jobnr)
451			{
452		✗	PlaneContext *p = &s->planes[plane];
453		✗	const int block = p->b;
454		✗	const int buffer_linesize = p->buffer_linesize / sizeof(float);
455		✗	const float depthx = (1 << (s->depth - 8)) * (1 << (s->depth - 8));
456		✗	const float sigma = s->sigma * depthx / (2.f * s->block_size * s->block_size);
457		✗	const float limit = 1.f - s->amount;
458		✗	float *cbuffer = p->buffer[jobnr][CURRENT];
459		✗	const int method = s->method;
460		✗	float *cbuff = cbuffer;
461		✗	float *pbuff = pbuffer;
462
463		✗	for (int i = 0; i < block; i++) {
464		✗	for (int j = 0; j < block; j++) {
465			AVComplexFloat buffer[BSIZE];
466			AVComplexFloat outbuffer[BSIZE];
467
468		✗	buffer[0].re = pbuff[2 * j ];
469		✗	buffer[0].im = pbuff[2 * j + 1];
470
471		✗	buffer[1].re = cbuff[2 * j ];
472		✗	buffer[1].im = cbuff[2 * j + 1];
473
474		✗	s->tx_r_fn(s->fft_r[jobnr], outbuffer, buffer, sizeof(AVComplexFloat));
475
476		✗	for (int z = 0; z < 2; z++) {
477		✗	const float re = outbuffer[z].re;
478		✗	const float im = outbuffer[z].im;
479		✗	const float power = re * re + im * im;
480			float factor;
481
482		✗	switch (method) {
483		✗	case 0:
484		✗	factor = fmaxf(limit, (power - sigma) / (power + 1e-15f));
485		✗	break;
486		✗	case 1:
487		✗	factor = power < sigma ? limit : 1.f;
488		✗	break;
489			}
490
491		✗	outbuffer[z].re *= factor;
492		✗	outbuffer[z].im *= factor;
493			}
494
495		✗	s->itx_r_fn(s->ifft_r[jobnr], buffer, outbuffer, sizeof(AVComplexFloat));
496
497		✗	cbuff[2 * j + 0] = buffer[1].re;
498		✗	cbuff[2 * j + 1] = buffer[1].im;
499			}
500
501		✗	cbuff += buffer_linesize;
502		✗	pbuff += buffer_linesize;
503			}
504		✗	}
505
506		✗	static void filter_block2d(FFTdnoizContext *s, int plane,
507			int jobnr)
508			{
509		✗	PlaneContext *p = &s->planes[plane];
510		✗	const int block = p->b;
511		✗	const int method = s->method;
512		✗	const int buffer_linesize = p->buffer_linesize / sizeof(float);
513		✗	const float depthx = (1 << (s->depth - 8)) * (1 << (s->depth - 8));
514		✗	const float sigma = s->sigma * depthx / (s->block_size * s->block_size);
515		✗	const float limit = 1.f - s->amount;
516		✗	float *buff = p->buffer[jobnr][CURRENT];
517
518		✗	for (int i = 0; i < block; i++) {
519		✗	for (int j = 0; j < block; j++) {
520			float factor, power, re, im;
521
522		✗	re = buff[j * 2 ];
523		✗	im = buff[j * 2 + 1];
524		✗	power = re * re + im * im;
525		✗	switch (method) {
526		✗	case 0:
527		✗	factor = fmaxf(limit, (power - sigma) / (power + 1e-15f));
528		✗	break;
529		✗	case 1:
530		✗	factor = power < sigma ? limit : 1.f;
531		✗	break;
532			}
533
534		✗	buff[j * 2 ] *= factor;
535		✗	buff[j * 2 + 1] *= factor;
536			}
537
538		✗	buff += buffer_linesize;
539			}
540		✗	}
541
542		✗	static int denoise(AVFilterContext *ctx, void *arg,
543			int jobnr, int nb_jobs)
544			{
545		✗	FFTdnoizContext *s = ctx->priv;
546		✗	AVFrame *out = arg;
547
548		✗	for (int plane = 0; plane < s->nb_planes; plane++) {
549		✗	PlaneContext *p = &s->planes[plane];
550		✗	const int nox = p->nox;
551		✗	const int noy = p->noy;
552		✗	const int slice_start = ff_slice_pos(noy, jobnr, nb_jobs);
553		✗	const int slice_end = ff_slice_pos(noy, jobnr + 1, nb_jobs);
554
555		✗	if (!((1 << plane) & s->planesf) || ctx->is_disabled)
556		✗	continue;
557
558		✗	for (int y = slice_start; y < slice_end; y++) {
559		✗	for (int x = 0; x < nox; x++) {
560		✗	if (s->next) {
561		✗	import_block(s, s->next->data[plane], s->next->linesize[plane],
562			p->buffer[jobnr][NEXT], p->buffer_linesize, plane,
563			jobnr, y, x);
564			}
565
566		✗	if (s->prev) {
567		✗	import_block(s, s->prev->data[plane], s->prev->linesize[plane],
568			p->buffer[jobnr][PREV], p->buffer_linesize, plane,
569			jobnr, y, x);
570			}
571
572		✗	import_block(s, s->cur->data[plane], s->cur->linesize[plane],
573			p->buffer[jobnr][CURRENT], p->buffer_linesize, plane,
574			jobnr, y, x);
575
576		✗	if (s->next && s->prev) {
577		✗	filter_block3d2(s, plane, p->buffer[jobnr][PREV], p->buffer[jobnr][NEXT], jobnr);
578		✗	} else if (s->next) {
579		✗	filter_block3d1(s, plane, p->buffer[jobnr][NEXT], jobnr);
580		✗	} else if (s->prev) {
581		✗	filter_block3d1(s, plane, p->buffer[jobnr][PREV], jobnr);
582			} else {
583		✗	filter_block2d(s, plane, jobnr);
584			}
585
586		✗	export_block(s, out->data[plane], out->linesize[plane],
587			p->buffer[jobnr][CURRENT], p->buffer_linesize, plane,
588			jobnr, y, x);
589			}
590			}
591			}
592
593		✗	return 0;
594			}
595
596		✗	static int filter_frame(AVFilterLink *inlink, AVFrame *in)
597			{
598		✗	AVFilterContext *ctx = inlink->dst;
599		✗	FFTdnoizContext *s = ctx->priv;
600		✗	AVFilterLink *outlink = ctx->outputs[0];
601			int direct, plane;
602			AVFrame *out;
603
604		✗	if (s->nb_next > 0 && s->nb_prev > 0) {
605		✗	av_frame_free(&s->prev);
606		✗	s->prev = s->cur;
607		✗	s->cur = s->next;
608		✗	s->next = in;
609
610		✗	if (!s->prev && s->cur) {
611		✗	s->prev = av_frame_clone(s->cur);
612		✗	if (!s->prev)
613		✗	return AVERROR(ENOMEM);
614			}
615		✗	if (!s->cur)
616		✗	return 0;
617		✗	} else if (s->nb_next > 0) {
618		✗	av_frame_free(&s->cur);
619		✗	s->cur = s->next;
620		✗	s->next = in;
621
622		✗	if (!s->cur)
623		✗	return 0;
624		✗	} else if (s->nb_prev > 0) {
625		✗	av_frame_free(&s->prev);
626		✗	s->prev = s->cur;
627		✗	s->cur = in;
628
629		✗	if (!s->prev)
630		✗	s->prev = av_frame_clone(s->cur);
631		✗	if (!s->prev)
632		✗	return AVERROR(ENOMEM);
633			} else {
634		✗	s->cur = in;
635			}
636
637		✗	if (av_frame_is_writable(in) && s->nb_next == 0 && s->nb_prev == 0) {
638		✗	direct = 1;
639		✗	out = in;
640			} else {
641		✗	direct = 0;
642		✗	out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
643		✗	if (!out)
644		✗	return AVERROR(ENOMEM);
645		✗	av_frame_copy_props(out, s->cur);
646			}
647
648		✗	ff_filter_execute(ctx, denoise, out, NULL,
649		✗	FFMIN(s->planes[0].noy, s->nb_threads));
650
651		✗	for (plane = 0; plane < s->nb_planes; plane++) {
652		✗	PlaneContext *p = &s->planes[plane];
653
654		✗	if (!((1 << plane) & s->planesf) || ctx->is_disabled) {
655		✗	if (!direct)
656		✗	av_image_copy_plane(out->data[plane], out->linesize[plane],
657		✗	s->cur->data[plane], s->cur->linesize[plane],
658		✗	p->planewidth * (1 + (s->depth > 8)), p->planeheight);
659		✗	continue;
660			}
661			}
662
663		✗	if (s->nb_next == 0 && s->nb_prev == 0) {
664		✗	if (direct) {
665		✗	s->cur = NULL;
666			} else {
667		✗	av_frame_free(&s->cur);
668			}
669			}
670		✗	return ff_filter_frame(outlink, out);
671			}
672
673		✗	static int request_frame(AVFilterLink *outlink)
674			{
675		✗	AVFilterContext *ctx = outlink->src;
676		✗	FFTdnoizContext *s = ctx->priv;
677		✗	int ret = 0;
678
679		✗	ret = ff_request_frame(ctx->inputs[0]);
680
681		✗	if (ret == AVERROR_EOF && (s->nb_next > 0)) {
682			AVFrame *buf;
683
684		✗	if (s->next && s->nb_next > 0)
685		✗	buf = av_frame_clone(s->next);
686		✗	else if (s->cur)
687		✗	buf = av_frame_clone(s->cur);
688			else
689		✗	buf = av_frame_clone(s->prev);
690		✗	if (!buf)
691		✗	return AVERROR(ENOMEM);
692
693		✗	ret = filter_frame(ctx->inputs[0], buf);
694		✗	if (ret < 0)
695		✗	return ret;
696		✗	ret = AVERROR_EOF;
697			}
698
699		✗	return ret;
700			}
701
702		✗	static av_cold void uninit(AVFilterContext *ctx)
703			{
704		✗	FFTdnoizContext *s = ctx->priv;
705			int i;
706
707		✗	for (i = 0; i < 4; i++) {
708		✗	PlaneContext *p = &s->planes[i];
709
710		✗	for (int j = 0; j < s->nb_threads; j++) {
711		✗	av_freep(&p->hdata[j]);
712		✗	av_freep(&p->vdata[j]);
713		✗	av_freep(&p->hdata_out[j]);
714		✗	av_freep(&p->vdata_out[j]);
715		✗	av_freep(&p->buffer[j][PREV]);
716		✗	av_freep(&p->buffer[j][CURRENT]);
717		✗	av_freep(&p->buffer[j][NEXT]);
718			}
719			}
720
721		✗	for (i = 0; i < s->nb_threads; i++) {
722		✗	av_tx_uninit(&s->fft[i]);
723		✗	av_tx_uninit(&s->ifft[i]);
724		✗	av_tx_uninit(&s->fft_r[i]);
725		✗	av_tx_uninit(&s->ifft_r[i]);
726			}
727
728		✗	av_frame_free(&s->prev);
729		✗	av_frame_free(&s->cur);
730		✗	av_frame_free(&s->next);
731		✗	}
732
733			static const AVFilterPad fftdnoiz_inputs[] = {
734			{
735			.name = "default",
736			.type = AVMEDIA_TYPE_VIDEO,
737			.filter_frame = filter_frame,
738			.config_props = config_input,
739			},
740			};
741
742			static const AVFilterPad fftdnoiz_outputs[] = {
743			{
744			.name = "default",
745			.type = AVMEDIA_TYPE_VIDEO,
746			.request_frame = request_frame,
747			},
748			};
749
750			const FFFilter ff_vf_fftdnoiz = {
751			.p.name = "fftdnoiz",
752			.p.description = NULL_IF_CONFIG_SMALL("Denoise frames using 3D FFT."),
753			.p.priv_class = &fftdnoiz_class,
754			.p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
755			AVFILTER_FLAG_SLICE_THREADS,
756			.priv_size = sizeof(FFTdnoizContext),
757			.uninit = uninit,
758			FILTER_INPUTS(fftdnoiz_inputs),
759			FILTER_OUTPUTS(fftdnoiz_outputs),
760			FILTER_PIXFMTS_ARRAY(pix_fmts),
761			.process_command = ff_filter_process_command,
762			};
763