FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_yaepblur.c
Date: 2024-03-28 04:31:58
Exec Total Coverage
Lines: 0 83 0.0%
Functions: 0 8 0.0%
Branches: 0 48 0.0%

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1 /*
2 * Copyright (C) 2019 Leo Zhang <leozhang@qiyi.com>
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 * @file
23 * yaep(yet another edge preserving) blur filter
24 *
25 * This implementation is based on an algorithm described in
26 * "J. S. Lee, Digital image enhancement and noise filtering by use of local statistics, IEEE Trans. Pattern
27 * Anal. Mach. Intell. PAMI-2, 1980."
28 */
29
30 #include "libavutil/opt.h"
31 #include "libavutil/imgutils.h"
32 #include "avfilter.h"
33 #include "internal.h"
34 #include "video.h"
35
36 typedef struct YAEPContext {
37 const AVClass *class;
38
39 int planes;
40 int radius;
41 int sigma;
42
43 int nb_planes;
44 int planewidth[4];
45 int planeheight[4];
46 int depth;
47
48 uint64_t *sat; ///< summed area table
49 uint64_t *square_sat; ///< square summed area table
50 int sat_linesize;
51
52 int (*pre_calculate_row)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
53 int (*filter_slice )(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
54 } YAEPContext;
55
56 static av_cold void uninit(AVFilterContext *ctx)
57 {
58 YAEPContext *s = ctx->priv;
59 av_freep(&s->sat);
60 av_freep(&s->square_sat);
61 }
62
63 static const enum AVPixelFormat pix_fmts[] = {
64 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
65 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
66 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
67 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
68 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
69 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
70 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
71 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
72 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
73 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
74 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
75 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
76 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
77 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
78 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
79 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
80 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
81 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
82 AV_PIX_FMT_NONE
83 };
84
85 typedef struct ThreadData {
86 int width;
87 int height;
88 int src_linesize;
89 int dst_linesize;
90 uint8_t *src;
91 uint8_t *dst;
92 } ThreadData;
93
94 #define PRE_CALCULATE_ROW(type, name) \
95 static int pre_calculate_row_##name(AVFilterContext *ctx, void *arg, \
96 int jobnr, int nb_jobs) \
97 { \
98 ThreadData *td = arg; \
99 YAEPContext *s = ctx->priv; \
100 \
101 const int width = td->width; \
102 const int height = td->height; \
103 const int linesize = td->src_linesize / sizeof(type); \
104 const int sat_linesize = s->sat_linesize; \
105 \
106 const int starty = height * jobnr / nb_jobs; \
107 const int endy = height * (jobnr+1) / nb_jobs; \
108 \
109 uint64_t *sat = s->sat + (starty + 1) * sat_linesize; \
110 uint64_t *square_sat = s->square_sat + (starty + 1) * sat_linesize; \
111 const type *src = (const type *)td->src + starty * linesize; \
112 \
113 int x, y; \
114 \
115 for (y = starty; y < endy; y++) { \
116 for (x = 0; x < width; x++) { \
117 sat[x+1] = sat[x] + src[x]; \
118 square_sat[x+1] = square_sat[x] + (uint64_t)src[x] * src[x]; \
119 } \
120 sat += sat_linesize; \
121 square_sat += sat_linesize; \
122 src += linesize; \
123 } \
124 \
125 return 0; \
126 }
127
128 PRE_CALCULATE_ROW(uint8_t, byte)
129 PRE_CALCULATE_ROW(uint16_t, word)
130
131 static int pre_calculate_col(AVFilterContext *ctx, void *arg,
132 int jobnr, int nb_jobs)
133 {
134 ThreadData *td = arg;
135 YAEPContext *s = ctx->priv;
136
137 const int width = td->width;
138 const int height = td->height;
139 const int sat_linesize = s->sat_linesize;
140
141 const int startx = width * jobnr / nb_jobs;
142 const int endx = width * (jobnr + 1) / nb_jobs;
143
144 uint64_t *sat, *square_sat;
145 int x, y;
146
147 for (x = startx; x < endx; x++) {
148 sat = s->sat + x + 1;
149 square_sat = s->square_sat + x + 1;
150 for (y = 0; y < height; y++) {
151 *(sat+sat_linesize) += *sat;
152 *(square_sat+sat_linesize) += *square_sat;
153 sat += sat_linesize;
154 square_sat += sat_linesize;
155 }
156 }
157
158 return 0;
159 }
160
161 #define FILTER_SLICE(type, name) \
162 static int filter_slice_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
163 { \
164 ThreadData *td = arg; \
165 YAEPContext *s = ctx->priv; \
166 \
167 const int width = td->width; \
168 const int height = td->height; \
169 const int src_linesize = td->src_linesize / sizeof(type); \
170 const int dst_linesize = td->dst_linesize / sizeof(type); \
171 const int sat_linesize = s->sat_linesize; \
172 const int sigma = s->sigma; \
173 const int radius = s->radius; \
174 \
175 uint64_t *sat = s->sat; \
176 uint64_t *square_sat = s->square_sat; \
177 const type *src = (const type *)td->src; \
178 type *dst = (type *)td->dst; \
179 \
180 const int starty = height * jobnr / nb_jobs; \
181 const int endy = height * (jobnr + 1) / nb_jobs; \
182 \
183 int x, y; \
184 int lower_x, higher_x; \
185 int lower_y, higher_y; \
186 int dist_y, count; \
187 uint64_t sum, square_sum, mean, var; \
188 \
189 for (y = starty; y < endy; y++) { \
190 lower_y = y - radius < 0 ? 0 : y - radius; \
191 higher_y = y + radius + 1 > height ? height : y + radius + 1; \
192 dist_y = higher_y - lower_y; \
193 for (x = 0; x < width; x++) { \
194 lower_x = x - radius < 0 ? 0 : x - radius; \
195 higher_x = x + radius + 1 > width ? width : x + radius + 1; \
196 count = dist_y * (higher_x - lower_x); \
197 sum = sat[higher_y * sat_linesize + higher_x] \
198 - sat[higher_y * sat_linesize + lower_x] \
199 - sat[lower_y * sat_linesize + higher_x] \
200 + sat[lower_y * sat_linesize + lower_x]; \
201 square_sum = square_sat[higher_y * sat_linesize + higher_x] \
202 - square_sat[higher_y * sat_linesize + lower_x] \
203 - square_sat[lower_y * sat_linesize + higher_x] \
204 + square_sat[lower_y * sat_linesize + lower_x]; \
205 mean = sum / count; \
206 var = (square_sum - sum * sum / count) / count; \
207 dst[y * dst_linesize + x] = (sigma * mean + var * src[y * src_linesize + x]) / (sigma + var); \
208 } \
209 } \
210 return 0; \
211 }
212
213 FILTER_SLICE(uint8_t, byte)
214 FILTER_SLICE(uint16_t, word)
215
216 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
217 {
218 AVFilterContext *ctx = inlink->dst;
219 YAEPContext *s = ctx->priv;
220 AVFilterLink *outlink = ctx->outputs[0];
221 AVFrame *out;
222 int plane;
223 const int nb_threads = ff_filter_get_nb_threads(ctx);
224 ThreadData td;
225
226 if (av_frame_is_writable(in)) {
227 out = in;
228 } else {
229 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
230 if (!out) {
231 av_frame_free(&in);
232 return AVERROR(ENOMEM);
233 }
234 av_frame_copy_props(out, in);
235 }
236
237 for (plane = 0; plane < s->nb_planes; plane++) {
238 if (!s->radius || !(s->planes & (1<<plane))) {
239 if (out != in) {
240 av_image_copy_plane(out->data[plane], out->linesize[plane],
241 in->data[plane], in->linesize[plane],
242 s->planewidth[plane] * ((s->depth + 7) / 8),
243 s->planeheight[plane]);
244 }
245 continue;
246 }
247
248 td.width = s->planewidth[plane];
249 td.height = s->planeheight[plane];
250 td.src = in->data[plane];
251 td.src_linesize = in->linesize[plane];
252 ff_filter_execute(ctx, s->pre_calculate_row, &td, NULL,
253 FFMIN(td.height, nb_threads));
254 ff_filter_execute(ctx, pre_calculate_col, &td, NULL,
255 FFMIN(td.width, nb_threads));
256
257 td.dst = out->data[plane];
258 td.dst_linesize = out->linesize[plane];
259 ff_filter_execute(ctx, s->filter_slice, &td, NULL,
260 FFMIN(td.height, nb_threads));
261 }
262
263 if (out != in)
264 av_frame_free(&in);
265
266 return ff_filter_frame(outlink, out);
267 }
268
269 static int config_input(AVFilterLink *inlink)
270 {
271 YAEPContext *s = inlink->dst->priv;
272 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
273
274 s->depth = desc->comp[0].depth;
275 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
276 s->planewidth[0] = s->planewidth[3] = inlink->w;
277 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
278 s->planeheight[0] = s->planeheight[3] = inlink->h;
279 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
280
281 s->radius = FFMIN(s->radius, AV_CEIL_RSHIFT(FFMIN(inlink->w, inlink->h), 1));
282
283 if (s->depth <= 8) {
284 s->pre_calculate_row = pre_calculate_row_byte;
285 s->filter_slice = filter_slice_byte;
286 } else {
287 s->pre_calculate_row = pre_calculate_row_word;
288 s->filter_slice = filter_slice_word;
289 }
290
291 // padding one row on the top, and padding one col on the left, that is why + 1 below
292 s->sat_linesize = inlink->w + 1;
293 s->sat = av_calloc(inlink->h + 1, s->sat_linesize * sizeof(*s->sat));
294 if (!s->sat)
295 return AVERROR(ENOMEM);
296
297 s->square_sat = av_calloc(inlink->h + 1, s->sat_linesize * sizeof(*s->square_sat));
298 if (!s->square_sat)
299 return AVERROR(ENOMEM);
300
301 return 0;
302 }
303
304 static const AVFilterPad yaep_inputs[] = {
305 {
306 .name = "default",
307 .type = AVMEDIA_TYPE_VIDEO,
308 .config_props = config_input,
309 .filter_frame = filter_frame,
310 },
311 };
312
313 #define OFFSET(x) offsetof(YAEPContext, x)
314 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
315
316 static const AVOption yaepblur_options[] = {
317 { "radius", "set window radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=3}, 0, INT_MAX, .flags=FLAGS },
318 { "r" , "set window radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=3}, 0, INT_MAX, .flags=FLAGS },
319 { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1}, 0, 0xF, .flags=FLAGS },
320 { "p", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1}, 0, 0xF, .flags=FLAGS },
321 { "sigma", "set blur strength", OFFSET(sigma), AV_OPT_TYPE_INT, {.i64=128}, 1, INT_MAX, .flags=FLAGS },
322 { "s", "set blur strength", OFFSET(sigma), AV_OPT_TYPE_INT, {.i64=128}, 1, INT_MAX, .flags=FLAGS },
323 { NULL }
324 };
325
326 AVFILTER_DEFINE_CLASS(yaepblur);
327
328 const AVFilter ff_vf_yaepblur = {
329 .name = "yaepblur",
330 .description = NULL_IF_CONFIG_SMALL("Yet another edge preserving blur filter."),
331 .priv_size = sizeof(YAEPContext),
332 .priv_class = &yaepblur_class,
333 .uninit = uninit,
334 FILTER_INPUTS(yaep_inputs),
335 FILTER_OUTPUTS(ff_video_default_filterpad),
336 FILTER_PIXFMTS_ARRAY(pix_fmts),
337 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
338 .process_command = ff_filter_process_command,
339 };
340