FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_floodfill.c
Date: 2022-12-05 20:26:17
Exec Total Coverage
Lines: 0 189 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/opt.h"
22 #include "libavutil/imgutils.h"
23 #include "libavutil/intreadwrite.h"
24 #include "avfilter.h"
25 #include "formats.h"
26 #include "internal.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 = av_frame_make_writable(frame))
319 return ret;
320
321 while (s->front > s->back) {
322 int x, y;
323
324 s->front--;
325 x = s->points[s->front].x;
326 y = s->points[s->front].y;
327
328 if (s->is_same(frame, x, y, s0, s1, s2, s3)) {
329 s->set_pixel(frame, x, y, d0, d1, d2, d3);
330
331 if (is_inside(x + 1, y, w, h)) {
332 s->points[s->front] .x = x + 1;
333 s->points[s->front++].y = y;
334 }
335
336 if (is_inside(x - 1, y, w, h)) {
337 s->points[s->front] .x = x - 1;
338 s->points[s->front++].y = y;
339 }
340
341 if (is_inside(x, y + 1, w, h)) {
342 s->points[s->front] .x = x;
343 s->points[s->front++].y = y + 1;
344 }
345
346 if (is_inside(x, y - 1, w, h)) {
347 s->points[s->front] .x = x;
348 s->points[s->front++].y = y - 1;
349 }
350 }
351 }
352 }
353
354 end:
355 return ff_filter_frame(ctx->outputs[0], frame);
356 }
357
358 static const enum AVPixelFormat pixel_fmts[] = {
359 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
360 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P,
361 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
362 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
363 AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GBRAP,
364 AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUVA444P10,
365 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUVA444P16,
366 AV_PIX_FMT_NONE
367 };
368
369 static av_cold void uninit(AVFilterContext *ctx)
370 {
371 FloodfillContext *s = ctx->priv;
372
373 av_freep(&s->points);
374 }
375
376 static const AVFilterPad floodfill_inputs[] = {
377 {
378 .name = "default",
379 .type = AVMEDIA_TYPE_VIDEO,
380 .filter_frame = filter_frame,
381 .config_props = config_input,
382 },
383 };
384
385 static const AVFilterPad floodfill_outputs[] = {
386 {
387 .name = "default",
388 .type = AVMEDIA_TYPE_VIDEO,
389 },
390 };
391
392 #define OFFSET(x) offsetof(FloodfillContext, x)
393 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
394
395 static const AVOption floodfill_options[] = {
396 { "x", "set pixel x coordinate", OFFSET(x), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
397 { "y", "set pixel y coordinate", OFFSET(y), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
398 { "s0", "set source #0 component value", OFFSET(s[0]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
399 { "s1", "set source #1 component value", OFFSET(s[1]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
400 { "s2", "set source #2 component value", OFFSET(s[2]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
401 { "s3", "set source #3 component value", OFFSET(s[3]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
402 { "d0", "set destination #0 component value", OFFSET(d[0]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
403 { "d1", "set destination #1 component value", OFFSET(d[1]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
404 { "d2", "set destination #2 component value", OFFSET(d[2]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
405 { "d3", "set destination #3 component value", OFFSET(d[3]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
406 { NULL }
407 };
408
409 AVFILTER_DEFINE_CLASS(floodfill);
410
411 const AVFilter ff_vf_floodfill = {
412 .name = "floodfill",
413 .description = NULL_IF_CONFIG_SMALL("Fill area with same color with another color."),
414 .priv_size = sizeof(FloodfillContext),
415 .priv_class = &floodfill_class,
416 .uninit = uninit,
417 FILTER_INPUTS(floodfill_inputs),
418 FILTER_OUTPUTS(floodfill_outputs),
419 FILTER_PIXFMTS_ARRAY(pixel_fmts),
420 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
421 };
422