FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_floodfill.c
Date: 2026-04-28 04:29:18
Exec Total Coverage
Lines: 0 203 0.0%
Functions: 0 22 0.0%
Branches: 0 108 0.0%
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1 /*
2 * Copyright (c) 2017 Paul B Mahol
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 #include "libavutil/mem.h"
22 #include "libavutil/opt.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/pixdesc.h"
25 #include "avfilter.h"
26 #include "filters.h"
27 #include "video.h"
28
29 typedef struct Points {
30 uint16_t x, y;
31 } Points;
32
33 typedef struct FloodfillContext {
34 const AVClass *class;
35
36 int x, y;
37 int s[4];
38 int S[4];
39 int d[4];
40
41 int nb_planes;
42 int back, front;
43 Points *points;
44
45 int (*is_same)(const AVFrame *frame, int x, int y,
46 unsigned s0, unsigned s1, unsigned s2, unsigned s3);
47 void (*set_pixel)(AVFrame *frame, int x, int y,
48 unsigned d0, unsigned d1, unsigned d2, unsigned d3);
49 void (*pick_pixel)(const AVFrame *frame, int x, int y,
50 int *s0, int *s1, int *s2, int *s3);
51 } FloodfillContext;
52
53 ✗ static int is_inside(int x, int y, int w, int h)
54 {
55 ✗ if (x >= 0 && x < w && y >= 0 && y < h)
56 ✗ return 1;
57 ✗ return 0;
58 }
59
60 ✗ static int is_same4(const AVFrame *frame, int x, int y,
61 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
62 {
63 ✗ unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
64 ✗ unsigned c1 = frame->data[1][y * frame->linesize[1] + x];
65 ✗ unsigned c2 = frame->data[2][y * frame->linesize[2] + x];
66 ✗ unsigned c3 = frame->data[3][y * frame->linesize[3] + x];
67
68 ✗ if (s0 == c0 && s1 == c1 && s2 == c2 && s3 == c3)
69 ✗ return 1;
70 ✗ return 0;
71 }
72
73 ✗ static int is_same4_16(const AVFrame *frame, int x, int y,
74 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
75 {
76 ✗ unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
77 ✗ unsigned c1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
78 ✗ unsigned c2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
79 ✗ unsigned c3 = AV_RN16(frame->data[3] + y * frame->linesize[3] + 2 * x);
80
81 ✗ if (s0 == c0 && s1 == c1 && s2 == c2 && s3 == c3)
82 ✗ return 1;
83 ✗ return 0;
84 }
85
86 ✗ static int is_same3(const AVFrame *frame, int x, int y,
87 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
88 {
89 ✗ unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
90 ✗ unsigned c1 = frame->data[1][y * frame->linesize[1] + x];
91 ✗ unsigned c2 = frame->data[2][y * frame->linesize[2] + x];
92
93 ✗ if (s0 == c0 && s1 == c1 && s2 == c2)
94 ✗ return 1;
95 ✗ return 0;
96 }
97
98 ✗ static int is_same3_16(const AVFrame *frame, int x, int y,
99 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
100 {
101 ✗ unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
102 ✗ unsigned c1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
103 ✗ unsigned c2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
104
105 ✗ if (s0 == c0 && s1 == c1 && s2 == c2)
106 ✗ return 1;
107 ✗ return 0;
108 }
109
110 ✗ static int is_same1(const AVFrame *frame, int x, int y,
111 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
112 {
113 ✗ unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
114
115 ✗ if (s0 == c0)
116 ✗ return 1;
117 ✗ return 0;
118 }
119
120 ✗ static int is_same1_16(const AVFrame *frame, int x, int y,
121 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
122 {
123 ✗ unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
124
125 ✗ if (s0 == c0)
126 ✗ return 1;
127 ✗ return 0;
128 }
129
130 ✗ static void set_pixel1(AVFrame *frame, int x, int y,
131 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
132 {
133 ✗ frame->data[0][y * frame->linesize[0] + x] = d0;
134 ✗ }
135
136 ✗ static void set_pixel1_16(AVFrame *frame, int x, int y,
137 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
138 {
139 ✗ AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
140 ✗ }
141
142 ✗ static void set_pixel3(AVFrame *frame, int x, int y,
143 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
144 {
145 ✗ frame->data[0][y * frame->linesize[0] + x] = d0;
146 ✗ frame->data[1][y * frame->linesize[1] + x] = d1;
147 ✗ frame->data[2][y * frame->linesize[2] + x] = d2;
148 ✗ }
149
150 ✗ static void set_pixel3_16(AVFrame *frame, int x, int y,
151 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
152 {
153 ✗ AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
154 ✗ AV_WN16(frame->data[1] + y * frame->linesize[1] + 2 * x, d1);
155 ✗ AV_WN16(frame->data[2] + y * frame->linesize[2] + 2 * x, d2);
156 ✗ }
157
158 ✗ static void set_pixel4(AVFrame *frame, int x, int y,
159 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
160 {
161 ✗ frame->data[0][y * frame->linesize[0] + x] = d0;
162 ✗ frame->data[1][y * frame->linesize[1] + x] = d1;
163 ✗ frame->data[2][y * frame->linesize[2] + x] = d2;
164 ✗ frame->data[3][y * frame->linesize[3] + x] = d3;
165 ✗ }
166
167 ✗ static void set_pixel4_16(AVFrame *frame, int x, int y,
168 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
169 {
170 ✗ AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
171 ✗ AV_WN16(frame->data[1] + y * frame->linesize[1] + 2 * x, d1);
172 ✗ AV_WN16(frame->data[2] + y * frame->linesize[2] + 2 * x, d2);
173 ✗ AV_WN16(frame->data[3] + y * frame->linesize[3] + 2 * x, d3);
174 ✗ }
175
176 ✗ static void pick_pixel1(const AVFrame *frame, int x, int y,
177 int *s0, int *s1, int *s2, int *s3)
178 {
179 ✗ if (*s0 < 0)
180 ✗ *s0 = frame->data[0][y * frame->linesize[0] + x];
181 ✗ }
182
183 ✗ static void pick_pixel1_16(const AVFrame *frame, int x, int y,
184 int *s0, int *s1, int *s2, int *s3)
185 {
186 ✗ if (*s0 < 0)
187 ✗ *s0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
188 ✗ }
189
190 ✗ static void pick_pixel3(const AVFrame *frame, int x, int y,
191 int *s0, int *s1, int *s2, int *s3)
192 {
193 ✗ if (*s0 < 0)
194 ✗ *s0 = frame->data[0][y * frame->linesize[0] + x];
195 ✗ if (*s1 < 0)
196 ✗ *s1 = frame->data[1][y * frame->linesize[1] + x];
197 ✗ if (*s2 < 0)
198 ✗ *s2 = frame->data[2][y * frame->linesize[2] + x];
199 ✗ }
200
201 ✗ static void pick_pixel3_16(const AVFrame *frame, int x, int y,
202 int *s0, int *s1, int *s2, int *s3)
203 {
204 ✗ if (*s0 < 0)
205 ✗ *s0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
206 ✗ if (*s1 < 0)
207 ✗ *s1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
208 ✗ if (*s2 < 0)
209 ✗ *s2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
210 ✗ }
211
212 ✗ static void pick_pixel4(const AVFrame *frame, int x, int y,
213 int *s0, int *s1, int *s2, int *s3)
214 {
215 ✗ if (*s0 < 0)
216 ✗ *s0 = frame->data[0][y * frame->linesize[0] + x];
217 ✗ if (*s1 < 0)
218 ✗ *s1 = frame->data[1][y * frame->linesize[1] + x];
219 ✗ if (*s2 < 0)
220 ✗ *s2 = frame->data[2][y * frame->linesize[2] + x];
221 ✗ if (*s3 < 0)
222 ✗ *s3 = frame->data[3][y * frame->linesize[3] + x];
223 ✗ }
224
225 ✗ static void pick_pixel4_16(const AVFrame *frame, int x, int y,
226 int *s0, int *s1, int *s2, int *s3)
227 {
228 ✗ if (*s0 < 0)
229 ✗ *s0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
230 ✗ if (*s1 < 0)
231 ✗ *s1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
232 ✗ if (*s2 < 0)
233 ✗ *s2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
234 ✗ if (*s3 < 0)
235 ✗ *s3 = AV_RN16(frame->data[3] + y * frame->linesize[3] + 2 * x);
236 ✗ }
237
238 ✗ static int config_input(AVFilterLink *inlink)
239 {
240 ✗ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
241 ✗ AVFilterContext *ctx = inlink->dst;
242 ✗ FloodfillContext *s = ctx->priv;
243 int depth;
244
245 ✗ s->nb_planes = av_pix_fmt_count_planes(inlink->format);
246 ✗ depth = desc->comp[0].depth;
247 ✗ if (depth == 8) {
248 ✗ switch (s->nb_planes) {
249 ✗ case 1: s->set_pixel = set_pixel1;
250 ✗ s->is_same = is_same1;
251 ✗ s->pick_pixel = pick_pixel1; break;
252 ✗ case 3: s->set_pixel = set_pixel3;
253 ✗ s->is_same = is_same3;
254 ✗ s->pick_pixel = pick_pixel3; break;
255 ✗ case 4: s->set_pixel = set_pixel4;
256 ✗ s->is_same = is_same4;
257 ✗ s->pick_pixel = pick_pixel4; break;
258 }
259 } else {
260 ✗ switch (s->nb_planes) {
261 ✗ case 1: s->set_pixel = set_pixel1_16;
262 ✗ s->is_same = is_same1_16;
263 ✗ s->pick_pixel = pick_pixel1_16; break;
264 ✗ case 3: s->set_pixel = set_pixel3_16;
265 ✗ s->is_same = is_same3_16;
266 ✗ s->pick_pixel = pick_pixel3_16; break;
267 ✗ case 4: s->set_pixel = set_pixel4_16;
268 ✗ s->is_same = is_same4_16;
269 ✗ s->pick_pixel = pick_pixel4_16; break;
270 }
271 }
272
273 ✗ s->front = s->back = 0;
274 ✗ s->points = av_calloc(inlink->w * inlink->h, 4 * sizeof(Points));
275 ✗ if (!s->points)
276 ✗ return AVERROR(ENOMEM);
277
278 ✗ return 0;
279 }
280
281 ✗ static int filter_frame(AVFilterLink *link, AVFrame *frame)
282 {
283 ✗ AVFilterContext *ctx = link->dst;
284 ✗ FloodfillContext *s = ctx->priv;
285 ✗ const unsigned d0 = s->d[0];
286 ✗ const unsigned d1 = s->d[1];
287 ✗ const unsigned d2 = s->d[2];
288 ✗ const unsigned d3 = s->d[3];
289 ✗ int s0 = s->s[0];
290 ✗ int s1 = s->s[1];
291 ✗ int s2 = s->s[2];
292 ✗ int s3 = s->s[3];
293 ✗ const int w = frame->width;
294 ✗ const int h = frame->height;
295 int i, ret;
296
297 ✗ if (is_inside(s->x, s->y, w, h)) {
298 ✗ s->pick_pixel(frame, s->x, s->y, &s0, &s1, &s2, &s3);
299
300 ✗ s->S[0] = s0;
301 ✗ s->S[1] = s1;
302 ✗ s->S[2] = s2;
303 ✗ s->S[3] = s3;
304 ✗ for (i = 0; i < s->nb_planes; i++) {
305 ✗ if (s->S[i] != s->d[i])
306 ✗ break;
307 }
308
309 ✗ if (i == s->nb_planes)
310 ✗ goto end;
311
312 ✗ if (s->is_same(frame, s->x, s->y, s0, s1, s2, s3)) {
313 ✗ s->points[s->front].x = s->x;
314 ✗ s->points[s->front].y = s->y;
315 ✗ s->front++;
316 }
317
318 ✗ if (ret = ff_inlink_make_frame_writable(link, &frame)) {
319 ✗ av_frame_free(&frame);
320 ✗ return ret;
321 }
322
323 ✗ while (s->front > s->back) {
324 int x, y;
325
326 ✗ s->front--;
327 ✗ x = s->points[s->front].x;
328 ✗ y = s->points[s->front].y;
329
330 ✗ if (s->is_same(frame, x, y, s0, s1, s2, s3)) {
331 ✗ s->set_pixel(frame, x, y, d0, d1, d2, d3);
332
333 ✗ if (is_inside(x + 1, y, w, h)) {
334 ✗ s->points[s->front] .x = x + 1;
335 ✗ s->points[s->front++].y = y;
336 }
337
338 ✗ if (is_inside(x - 1, y, w, h)) {
339 ✗ s->points[s->front] .x = x - 1;
340 ✗ s->points[s->front++].y = y;
341 }
342
343 ✗ if (is_inside(x, y + 1, w, h)) {
344 ✗ s->points[s->front] .x = x;
345 ✗ s->points[s->front++].y = y + 1;
346 }
347
348 ✗ if (is_inside(x, y - 1, w, h)) {
349 ✗ s->points[s->front] .x = x;
350 ✗ s->points[s->front++].y = y - 1;
351 }
352 }
353 }
354 }
355
356 ✗ end:
357 ✗ return ff_filter_frame(ctx->outputs[0], frame);
358 }
359
360 static const enum AVPixelFormat pixel_fmts[] = {
361 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
362 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P,
363 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
364 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
365 AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GBRAP,
366 AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUVA444P10,
367 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUVA444P16,
368 AV_PIX_FMT_NONE
369 };
370
371 ✗ static av_cold void uninit(AVFilterContext *ctx)
372 {
373 ✗ FloodfillContext *s = ctx->priv;
374
375 ✗ av_freep(&s->points);
376 ✗ }
377
378 static const AVFilterPad floodfill_inputs[] = {
379 {
380 .name = "default",
381 .type = AVMEDIA_TYPE_VIDEO,
382 .filter_frame = filter_frame,
383 .config_props = config_input,
384 },
385 };
386
387 #define OFFSET(x) offsetof(FloodfillContext, x)
388 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
389
390 static const AVOption floodfill_options[] = {
391 { "x", "set pixel x coordinate", OFFSET(x), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
392 { "y", "set pixel y coordinate", OFFSET(y), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
393 { "s0", "set source #0 component value", OFFSET(s[0]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
394 { "s1", "set source #1 component value", OFFSET(s[1]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
395 { "s2", "set source #2 component value", OFFSET(s[2]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
396 { "s3", "set source #3 component value", OFFSET(s[3]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
397 { "d0", "set destination #0 component value", OFFSET(d[0]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
398 { "d1", "set destination #1 component value", OFFSET(d[1]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
399 { "d2", "set destination #2 component value", OFFSET(d[2]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
400 { "d3", "set destination #3 component value", OFFSET(d[3]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
401 { NULL }
402 };
403
404 AVFILTER_DEFINE_CLASS(floodfill);
405
406 const FFFilter ff_vf_floodfill = {
407 .p.name = "floodfill",
408 .p.description = NULL_IF_CONFIG_SMALL("Fill area with same color with another color."),
409 .p.priv_class = &floodfill_class,
410 .p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
411 .priv_size = sizeof(FloodfillContext),
412 .uninit = uninit,
413 FILTER_INPUTS(floodfill_inputs),
414 FILTER_OUTPUTS(ff_video_default_filterpad),
415 FILTER_PIXFMTS_ARRAY(pixel_fmts),
416 };
417