1 /*
2 * Copyright (c) 2015 Arwa Arif <arwaarif1994@gmail.com>
3 * Copyright (c) 2017 Paul B Mahol
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License,
10 * 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 /**
23 * @file
24 * FFT domain filtering.
25 */
26
27 #include "libavfilter/internal.h"
28 #include "libavutil/common.h"
29 #include "libavutil/cpu.h"
30 #include "libavutil/imgutils.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/pixdesc.h"
33 #include "libavutil/tx.h"
34 #include "libavutil/eval.h"
35
36 #define MAX_THREADS 32
37 #define MAX_PLANES 4
38
39 enum EvalMode {
40 EVAL_MODE_INIT,
41 EVAL_MODE_FRAME,
42 EVAL_MODE_NB
43 };
44
45 typedef struct FFTFILTContext {
46 const AVClass *class;
47
48 int eval_mode;
49 int depth;
50 int nb_planes;
51 int nb_threads;
52 int planewidth[MAX_PLANES];
53 int planeheight[MAX_PLANES];
54
55 AVTXContext *hrdft[MAX_THREADS][MAX_PLANES];
56 AVTXContext *vrdft[MAX_THREADS][MAX_PLANES];
57 AVTXContext *ihrdft[MAX_THREADS][MAX_PLANES];
58 AVTXContext *ivrdft[MAX_THREADS][MAX_PLANES];
59
60 av_tx_fn htx_fn, ihtx_fn;
61 av_tx_fn vtx_fn, ivtx_fn;
62
63 int rdft_hbits[MAX_PLANES];
64 int rdft_vbits[MAX_PLANES];
65 size_t rdft_hstride[MAX_PLANES];
66 size_t rdft_vstride[MAX_PLANES];
67 size_t rdft_hlen[MAX_PLANES];
68 size_t rdft_vlen[MAX_PLANES];
69 float *rdft_hdata_in[MAX_PLANES];
70 float *rdft_vdata_in[MAX_PLANES];
71 float *rdft_hdata_out[MAX_PLANES];
72 float *rdft_vdata_out[MAX_PLANES];
73
74 int dc[MAX_PLANES];
75 char *weight_str[MAX_PLANES];
76 AVExpr *weight_expr[MAX_PLANES];
77 double *weight[MAX_PLANES];
78
79 int (*rdft_horizontal)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
80 int (*irdft_horizontal)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
81 } FFTFILTContext;
82
83 static const char *const var_names[] = { "X", "Y", "W", "H", "N", "WS", "HS", NULL };
84 enum { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_N, VAR_WS, VAR_HS, VAR_VARS_NB };
85
86 enum { Y = 0, U, V };
87
88 #define OFFSET(x) offsetof(FFTFILTContext, x)
89 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
90
91 static const AVOption fftfilt_options[] = {
92 { "dc_Y", "adjust gain in Y plane", OFFSET(dc[Y]), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1000, FLAGS },
93 { "dc_U", "adjust gain in U plane", OFFSET(dc[U]), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1000, FLAGS },
94 { "dc_V", "adjust gain in V plane", OFFSET(dc[V]), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1000, FLAGS },
95 { "weight_Y", "set luminance expression in Y plane", OFFSET(weight_str[Y]), AV_OPT_TYPE_STRING, {.str = "1"}, 0, 0, FLAGS },
96 { "weight_U", "set chrominance expression in U plane", OFFSET(weight_str[U]), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
97 { "weight_V", "set chrominance expression in V plane", OFFSET(weight_str[V]), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
98 { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
99 { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
100 { "frame", "eval expressions per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
101 {NULL},
102 };
103
104 AVFILTER_DEFINE_CLASS(fftfilt);
105
lum(void * priv,double x,double y,int plane)106 static inline double lum(void *priv, double x, double y, int plane)
107 {
108 FFTFILTContext *s = priv;
109 return s->rdft_vdata_out[plane][(int)x * s->rdft_vstride[plane] + (int)y];
110 }
111
weight_Y(void * priv,double x,double y)112 static double weight_Y(void *priv, double x, double y) { return lum(priv, x, y, Y); }
weight_U(void * priv,double x,double y)113 static double weight_U(void *priv, double x, double y) { return lum(priv, x, y, U); }
weight_V(void * priv,double x,double y)114 static double weight_V(void *priv, double x, double y) { return lum(priv, x, y, V); }
115
copy_rev(float * dest,int w,int w2)116 static void copy_rev(float *dest, int w, int w2)
117 {
118 int i;
119
120 for (i = w; i < w + (w2-w)/2; i++)
121 dest[i] = dest[2*w - i - 1];
122
123 for (; i < w2; i++)
124 dest[i] = dest[w2 - i];
125 }
126
rdft_horizontal8(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)127 static int rdft_horizontal8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
128 {
129 FFTFILTContext *s = ctx->priv;
130 AVFrame *in = arg;
131
132 for (int plane = 0; plane < s->nb_planes; plane++) {
133 const int w = s->planewidth[plane];
134 const int h = s->planeheight[plane];
135 const int slice_start = (h * jobnr) / nb_jobs;
136 const int slice_end = (h * (jobnr+1)) / nb_jobs;
137
138 for (int i = slice_start; i < slice_end; i++) {
139 const uint8_t *src = in->data[plane] + i * in->linesize[plane];
140 float *hdata_in = s->rdft_hdata_in[plane] + i * s->rdft_hstride[plane];
141
142 for (int j = 0; j < w; j++)
143 hdata_in[j] = src[j];
144
145 copy_rev(s->rdft_hdata_in[plane] + i * s->rdft_hstride[plane], w, s->rdft_hlen[plane]);
146 }
147
148 for (int i = slice_start; i < slice_end; i++)
149 s->htx_fn(s->hrdft[jobnr][plane],
150 s->rdft_hdata_out[plane] + i * s->rdft_hstride[plane],
151 s->rdft_hdata_in[plane] + i * s->rdft_hstride[plane],
152 sizeof(float));
153 }
154
155 return 0;
156 }
157
rdft_horizontal16(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)158 static int rdft_horizontal16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
159 {
160 FFTFILTContext *s = ctx->priv;
161 AVFrame *in = arg;
162
163 for (int plane = 0; plane < s->nb_planes; plane++) {
164 const int w = s->planewidth[plane];
165 const int h = s->planeheight[plane];
166 const int slice_start = (h * jobnr) / nb_jobs;
167 const int slice_end = (h * (jobnr+1)) / nb_jobs;
168
169 for (int i = slice_start; i < slice_end; i++) {
170 const uint16_t *src = (const uint16_t *)(in->data[plane] + i * in->linesize[plane]);
171 float *hdata_in = s->rdft_hdata_in[plane] + i * s->rdft_hstride[plane];
172
173 for (int j = 0; j < w; j++)
174 hdata_in[j] = src[j];
175
176 copy_rev(s->rdft_hdata_in[plane] + i * s->rdft_hstride[plane], w, s->rdft_hlen[plane]);
177 }
178
179 for (int i = slice_start; i < slice_end; i++)
180 s->htx_fn(s->hrdft[jobnr][plane],
181 s->rdft_hdata_out[plane] + i * s->rdft_hstride[plane],
182 s->rdft_hdata_in[plane] + i * s->rdft_hstride[plane],
183 sizeof(float));
184 }
185
186 return 0;
187 }
188
irdft_horizontal8(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)189 static int irdft_horizontal8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
190 {
191 FFTFILTContext *s = ctx->priv;
192 AVFrame *out = arg;
193
194 for (int plane = 0; plane < s->nb_planes; plane++) {
195 const int w = s->planewidth[plane];
196 const int h = s->planeheight[plane];
197 const int slice_start = (h * jobnr) / nb_jobs;
198 const int slice_end = (h * (jobnr+1)) / nb_jobs;
199
200 for (int i = slice_start; i < slice_end; i++)
201 s->ihtx_fn(s->ihrdft[jobnr][plane],
202 s->rdft_hdata_out[plane] + i * s->rdft_hstride[plane],
203 s->rdft_hdata_in[plane] + i * s->rdft_hstride[plane],
204 sizeof(float));
205
206 for (int i = slice_start; i < slice_end; i++) {
207 const float scale = 1.f / (s->rdft_hlen[plane] * s->rdft_vlen[plane]);
208 const float *src = s->rdft_hdata_out[plane] + i * s->rdft_hstride[plane];
209 uint8_t *dst = out->data[plane] + i * out->linesize[plane];
210
211 for (int j = 0; j < w; j++)
212 dst[j] = av_clip_uint8(lrintf(src[j] * scale));
213 }
214 }
215
216 return 0;
217 }
218
irdft_horizontal16(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)219 static int irdft_horizontal16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
220 {
221 FFTFILTContext *s = ctx->priv;
222 AVFrame *out = arg;
223
224 for (int plane = 0; plane < s->nb_planes; plane++) {
225 int max = (1 << s->depth) - 1;
226 const int w = s->planewidth[plane];
227 const int h = s->planeheight[plane];
228 const int slice_start = (h * jobnr) / nb_jobs;
229 const int slice_end = (h * (jobnr+1)) / nb_jobs;
230
231 for (int i = slice_start; i < slice_end; i++)
232 s->ihtx_fn(s->ihrdft[jobnr][plane],
233 s->rdft_hdata_out[plane] + i * s->rdft_hstride[plane],
234 s->rdft_hdata_in[plane] + i * s->rdft_hstride[plane],
235 sizeof(float));
236
237 for (int i = slice_start; i < slice_end; i++) {
238 const float scale = 1.f / (s->rdft_hlen[plane] * s->rdft_vlen[plane]);
239 const float *src = s->rdft_hdata_out[plane] + i * s->rdft_hstride[plane];
240 uint16_t *dst = (uint16_t *)(out->data[plane] + i * out->linesize[plane]);
241
242 for (int j = 0; j < w; j++)
243 dst[j] = av_clip(lrintf(src[j] * scale), 0, max);
244 }
245 }
246
247 return 0;
248 }
249
initialize(AVFilterContext * ctx)250 static av_cold int initialize(AVFilterContext *ctx)
251 {
252 FFTFILTContext *s = ctx->priv;
253 int ret = 0, plane;
254
255 if (!s->dc[U] && !s->dc[V]) {
256 s->dc[U] = s->dc[Y];
257 s->dc[V] = s->dc[Y];
258 } else {
259 if (!s->dc[U]) s->dc[U] = s->dc[V];
260 if (!s->dc[V]) s->dc[V] = s->dc[U];
261 }
262
263 if (!s->weight_str[U] && !s->weight_str[V]) {
264 s->weight_str[U] = av_strdup(s->weight_str[Y]);
265 s->weight_str[V] = av_strdup(s->weight_str[Y]);
266 } else {
267 if (!s->weight_str[U]) s->weight_str[U] = av_strdup(s->weight_str[V]);
268 if (!s->weight_str[V]) s->weight_str[V] = av_strdup(s->weight_str[U]);
269 }
270
271 for (plane = 0; plane < 3; plane++) {
272 static double (*p[])(void *, double, double) = { weight_Y, weight_U, weight_V };
273 const char *const func2_names[] = {"weight_Y", "weight_U", "weight_V", NULL };
274 double (*func2[])(void *, double, double) = { weight_Y, weight_U, weight_V, p[plane], NULL };
275
276 ret = av_expr_parse(&s->weight_expr[plane], s->weight_str[plane], var_names,
277 NULL, NULL, func2_names, func2, 0, ctx);
278 if (ret < 0)
279 break;
280 }
281 return ret;
282 }
283
do_eval(FFTFILTContext * s,AVFilterLink * inlink,int plane)284 static void do_eval(FFTFILTContext *s, AVFilterLink *inlink, int plane)
285 {
286 double values[VAR_VARS_NB];
287 int i, j;
288
289 values[VAR_N] = inlink->frame_count_out;
290 values[VAR_W] = s->planewidth[plane];
291 values[VAR_H] = s->planeheight[plane];
292 values[VAR_WS] = s->rdft_hlen[plane];
293 values[VAR_HS] = s->rdft_vlen[plane];
294
295 for (i = 0; i < s->rdft_hlen[plane]; i++) {
296 values[VAR_X] = i;
297 for (j = 0; j < s->rdft_vlen[plane]; j++) {
298 values[VAR_Y] = j;
299 s->weight[plane][i * s->rdft_vlen[plane] + j] =
300 av_expr_eval(s->weight_expr[plane], values, s);
301 }
302 }
303 }
304
config_props(AVFilterLink * inlink)305 static int config_props(AVFilterLink *inlink)
306 {
307 FFTFILTContext *s = inlink->dst->priv;
308 const AVPixFmtDescriptor *desc;
309 int i, plane;
310
311 desc = av_pix_fmt_desc_get(inlink->format);
312 s->depth = desc->comp[0].depth;
313 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
314 s->planewidth[0] = s->planewidth[3] = inlink->w;
315 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
316 s->planeheight[0] = s->planeheight[3] = inlink->h;
317
318 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
319 s->nb_threads = FFMIN(32, ff_filter_get_nb_threads(inlink->dst));
320
321 for (i = 0; i < desc->nb_components; i++) {
322 int w = s->planewidth[i];
323 int h = s->planeheight[i];
324
325 /* RDFT - Array initialization for Horizontal pass*/
326 s->rdft_hlen[i] = 1 << (32 - ff_clz(w));
327 s->rdft_hstride[i] = FFALIGN(s->rdft_hlen[i] + 2, av_cpu_max_align());
328 s->rdft_hbits[i] = av_log2(s->rdft_hlen[i]);
329 if (!(s->rdft_hdata_in[i] = av_calloc(h, s->rdft_hstride[i] * sizeof(float))))
330 return AVERROR(ENOMEM);
331
332 if (!(s->rdft_hdata_out[i] = av_calloc(h, s->rdft_hstride[i] * sizeof(float))))
333 return AVERROR(ENOMEM);
334
335 for (int j = 0; j < s->nb_threads; j++) {
336 float scale = 1.f, iscale = 1.f;
337
338 av_tx_init(&s->hrdft[j][i], &s->htx_fn, AV_TX_FLOAT_RDFT, 0, 1 << s->rdft_hbits[i], &scale, 0);
339 if (!s->hrdft[j][i])
340 return AVERROR(ENOMEM);
341 av_tx_init(&s->ihrdft[j][i], &s->ihtx_fn, AV_TX_FLOAT_RDFT, 1, 1 << s->rdft_hbits[i], &iscale, 0);
342 if (!s->ihrdft[j][i])
343 return AVERROR(ENOMEM);
344 }
345
346 /* RDFT - Array initialization for Vertical pass*/
347 s->rdft_vlen[i] = 1 << (32 - ff_clz(h));
348 s->rdft_vstride[i] = FFALIGN(s->rdft_vlen[i] + 2, av_cpu_max_align());
349 s->rdft_vbits[i] = av_log2(s->rdft_vlen[i]);
350 if (!(s->rdft_vdata_in[i] = av_calloc(s->rdft_hstride[i], s->rdft_vstride[i] * sizeof(float))))
351 return AVERROR(ENOMEM);
352
353 if (!(s->rdft_vdata_out[i] = av_calloc(s->rdft_hstride[i], s->rdft_vstride[i] * sizeof(float))))
354 return AVERROR(ENOMEM);
355
356 for (int j = 0; j < s->nb_threads; j++) {
357 float scale = 1.f, iscale = 1.f;
358
359 av_tx_init(&s->vrdft[j][i], &s->vtx_fn, AV_TX_FLOAT_RDFT, 0, 1 << s->rdft_vbits[i], &scale, 0);
360 if (!s->vrdft[j][i])
361 return AVERROR(ENOMEM);
362 av_tx_init(&s->ivrdft[j][i], &s->ivtx_fn, AV_TX_FLOAT_RDFT, 1, 1 << s->rdft_vbits[i], &iscale, 0);
363 if (!s->ivrdft[j][i])
364 return AVERROR(ENOMEM);
365 }
366 }
367
368 /*Luminance value - Array initialization*/
369 for (plane = 0; plane < 3; plane++) {
370 if(!(s->weight[plane] = av_calloc(s->rdft_hlen[plane], s->rdft_vlen[plane] * sizeof(double))))
371 return AVERROR(ENOMEM);
372
373 if (s->eval_mode == EVAL_MODE_INIT)
374 do_eval(s, inlink, plane);
375 }
376
377 if (s->depth <= 8) {
378 s->rdft_horizontal = rdft_horizontal8;
379 s->irdft_horizontal = irdft_horizontal8;
380 } else if (s->depth > 8) {
381 s->rdft_horizontal = rdft_horizontal16;
382 s->irdft_horizontal = irdft_horizontal16;
383 } else {
384 return AVERROR_BUG;
385 }
386 return 0;
387 }
388
multiply_data(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)389 static int multiply_data(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
390 {
391 FFTFILTContext *s = ctx->priv;
392
393 for (int plane = 0; plane < s->nb_planes; plane++) {
394 const int height = s->rdft_hlen[plane];
395 const int slice_start = (height * jobnr) / nb_jobs;
396 const int slice_end = (height * (jobnr+1)) / nb_jobs;
397 /*Change user defined parameters*/
398 for (int i = slice_start; i < slice_end; i++) {
399 const double *weight = s->weight[plane] + i * s->rdft_vlen[plane];
400 float *vdata = s->rdft_vdata_out[plane] + i * s->rdft_vstride[plane];
401
402 for (int j = 0; j < s->rdft_vlen[plane]; j++)
403 vdata[j] *= weight[j];
404 }
405 }
406
407 return 0;
408 }
409
copy_vertical(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)410 static int copy_vertical(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
411 {
412 FFTFILTContext *s = ctx->priv;
413
414 for (int plane = 0; plane < s->nb_planes; plane++) {
415 const int hlen = s->rdft_hlen[plane];
416 const int vlen = s->rdft_vlen[plane];
417 const int hstride = s->rdft_hstride[plane];
418 const int vstride = s->rdft_vstride[plane];
419 const int slice_start = (hlen * jobnr) / nb_jobs;
420 const int slice_end = (hlen * (jobnr+1)) / nb_jobs;
421 const int h = s->planeheight[plane];
422 float *hdata = s->rdft_hdata_out[plane];
423 float *vdata = s->rdft_vdata_in[plane];
424
425 for (int i = slice_start; i < slice_end; i++) {
426 for (int j = 0; j < h; j++)
427 vdata[i * vstride + j] = hdata[j * hstride + i];
428 copy_rev(vdata + i * vstride, h, vlen);
429 }
430 }
431
432 return 0;
433 }
434
rdft_vertical(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)435 static int rdft_vertical(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
436 {
437 FFTFILTContext *s = ctx->priv;
438
439 for (int plane = 0; plane < s->nb_planes; plane++) {
440 const int height = s->rdft_hlen[plane];
441 const int slice_start = (height * jobnr) / nb_jobs;
442 const int slice_end = (height * (jobnr+1)) / nb_jobs;
443
444 for (int i = slice_start; i < slice_end; i++)
445 s->vtx_fn(s->vrdft[jobnr][plane],
446 s->rdft_vdata_out[plane] + i * s->rdft_vstride[plane],
447 s->rdft_vdata_in[plane] + i * s->rdft_vstride[plane],
448 sizeof(float));
449 }
450
451 return 0;
452 }
453
irdft_vertical(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)454 static int irdft_vertical(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
455 {
456 FFTFILTContext *s = ctx->priv;
457
458 for (int plane = 0; plane < s->nb_planes; plane++) {
459 const int height = s->rdft_hlen[plane];
460 const int slice_start = (height * jobnr) / nb_jobs;
461 const int slice_end = (height * (jobnr+1)) / nb_jobs;
462
463 for (int i = slice_start; i < slice_end; i++)
464 s->ivtx_fn(s->ivrdft[jobnr][plane],
465 s->rdft_vdata_in[plane] + i * s->rdft_vstride[plane],
466 s->rdft_vdata_out[plane] + i * s->rdft_vstride[plane],
467 sizeof(float));
468 }
469
470 return 0;
471 }
472
copy_horizontal(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)473 static int copy_horizontal(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
474 {
475 FFTFILTContext *s = ctx->priv;
476
477 for (int plane = 0; plane < s->nb_planes; plane++) {
478 const int hlen = s->rdft_hlen[plane];
479 const int hstride = s->rdft_hstride[plane];
480 const int vstride = s->rdft_vstride[plane];
481 const int slice_start = (hlen * jobnr) / nb_jobs;
482 const int slice_end = (hlen * (jobnr+1)) / nb_jobs;
483 const int h = s->planeheight[plane];
484 float *hdata = s->rdft_hdata_in[plane];
485 float *vdata = s->rdft_vdata_in[plane];
486
487 for (int i = slice_start; i < slice_end; i++)
488 for (int j = 0; j < h; j++)
489 hdata[j * hstride + i] = vdata[i * vstride + j];
490 }
491
492 return 0;
493 }
494
filter_frame(AVFilterLink * inlink,AVFrame * in)495 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
496 {
497 AVFilterContext *ctx = inlink->dst;
498 AVFilterLink *outlink = inlink->dst->outputs[0];
499 FFTFILTContext *s = ctx->priv;
500 AVFrame *out;
501
502 out = ff_get_video_buffer(outlink, inlink->w, inlink->h);
503 if (!out) {
504 av_frame_free(&in);
505 return AVERROR(ENOMEM);
506 }
507
508 av_frame_copy_props(out, in);
509
510 ff_filter_execute(ctx, s->rdft_horizontal, in, NULL,
511 FFMIN(s->planeheight[1], s->nb_threads));
512
513 ff_filter_execute(ctx, copy_vertical, NULL, NULL,
514 FFMIN(s->planeheight[1], s->nb_threads));
515
516 ff_filter_execute(ctx, rdft_vertical, NULL, NULL,
517 FFMIN(s->planeheight[1], s->nb_threads));
518
519 for (int plane = 0; plane < s->nb_planes; plane++) {
520 if (s->eval_mode == EVAL_MODE_FRAME)
521 do_eval(s, inlink, plane);
522 }
523
524 ff_filter_execute(ctx, multiply_data, NULL, NULL,
525 FFMIN(s->planeheight[1], s->nb_threads));
526
527 for (int plane = 0; plane < s->nb_planes; plane++)
528 s->rdft_vdata_out[plane][0] += s->rdft_hlen[plane] * s->rdft_vlen[plane] * s->dc[plane] * (1 << (s->depth - 8));
529
530 ff_filter_execute(ctx, irdft_vertical, NULL, NULL,
531 FFMIN(s->planeheight[1], s->nb_threads));
532
533 ff_filter_execute(ctx, copy_horizontal, NULL, NULL,
534 FFMIN(s->planeheight[1], s->nb_threads));
535
536 ff_filter_execute(ctx, s->irdft_horizontal, out, NULL,
537 FFMIN(s->planeheight[1], s->nb_threads));
538
539 av_frame_free(&in);
540 return ff_filter_frame(outlink, out);
541 }
542
uninit(AVFilterContext * ctx)543 static av_cold void uninit(AVFilterContext *ctx)
544 {
545 FFTFILTContext *s = ctx->priv;
546
547 for (int i = 0; i < MAX_PLANES; i++) {
548 av_freep(&s->rdft_hdata_in[i]);
549 av_freep(&s->rdft_vdata_in[i]);
550 av_freep(&s->rdft_hdata_out[i]);
551 av_freep(&s->rdft_vdata_out[i]);
552 av_expr_free(s->weight_expr[i]);
553 av_freep(&s->weight[i]);
554 for (int j = 0; j < s->nb_threads; j++) {
555 av_tx_uninit(&s->hrdft[j][i]);
556 av_tx_uninit(&s->ihrdft[j][i]);
557 av_tx_uninit(&s->vrdft[j][i]);
558 av_tx_uninit(&s->ivrdft[j][i]);
559 }
560 }
561 }
562
563 static const enum AVPixelFormat pixel_fmts_fftfilt[] = {
564 AV_PIX_FMT_GRAY8,
565 AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12,
566 AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
567 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
568 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
569 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
570 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV420P10,
571 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV420P14,
572 AV_PIX_FMT_YUV420P16,
573 AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV422P10,
574 AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV422P14,
575 AV_PIX_FMT_YUV422P16,
576 AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10,
577 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14,
578 AV_PIX_FMT_YUV444P16,
579 AV_PIX_FMT_NONE
580 };
581
582 static const AVFilterPad fftfilt_inputs[] = {
583 {
584 .name = "default",
585 .type = AVMEDIA_TYPE_VIDEO,
586 .config_props = config_props,
587 .filter_frame = filter_frame,
588 },
589 };
590
591 static const AVFilterPad fftfilt_outputs[] = {
592 {
593 .name = "default",
594 .type = AVMEDIA_TYPE_VIDEO,
595 },
596 };
597
598 const AVFilter ff_vf_fftfilt = {
599 .name = "fftfilt",
600 .description = NULL_IF_CONFIG_SMALL("Apply arbitrary expressions to pixels in frequency domain."),
601 .priv_size = sizeof(FFTFILTContext),
602 .priv_class = &fftfilt_class,
603 FILTER_INPUTS(fftfilt_inputs),
604 FILTER_OUTPUTS(fftfilt_outputs),
605 FILTER_PIXFMTS_ARRAY(pixel_fmts_fftfilt),
606 .init = initialize,
607 .uninit = uninit,
608 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
609 };
610