FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_floodfill.c
Date: 2024-07-16 12:46:59
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 "internal.h"
28 #include "video.h"
29
30 typedef struct Points {
31 uint16_t x, y;
32 } Points;
33
34 typedef struct FloodfillContext {
35 const AVClass *class;
36
37 int x, y;
38 int s[4];
39 int S[4];
40 int d[4];
41
42 int nb_planes;
43 int back, front;
44 Points *points;
45
46 int (*is_same)(const AVFrame *frame, int x, int y,
47 unsigned s0, unsigned s1, unsigned s2, unsigned s3);
48 void (*set_pixel)(AVFrame *frame, int x, int y,
49 unsigned d0, unsigned d1, unsigned d2, unsigned d3);
50 void (*pick_pixel)(const AVFrame *frame, int x, int y,
51 int *s0, int *s1, int *s2, int *s3);
52 } FloodfillContext;
53
54 static int is_inside(int x, int y, int w, int h)
55 {
56 if (x >= 0 && x < w && y >= 0 && y < h)
57 return 1;
58 return 0;
59 }
60
61 static int is_same4(const AVFrame *frame, int x, int y,
62 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
63 {
64 unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
65 unsigned c1 = frame->data[1][y * frame->linesize[1] + x];
66 unsigned c2 = frame->data[2][y * frame->linesize[2] + x];
67 unsigned c3 = frame->data[3][y * frame->linesize[3] + x];
68
69 if (s0 == c0 && s1 == c1 && s2 == c2 && s3 == c3)
70 return 1;
71 return 0;
72 }
73
74 static int is_same4_16(const AVFrame *frame, int x, int y,
75 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
76 {
77 unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
78 unsigned c1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
79 unsigned c2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
80 unsigned c3 = AV_RN16(frame->data[3] + y * frame->linesize[3] + 2 * x);
81
82 if (s0 == c0 && s1 == c1 && s2 == c2 && s3 == c3)
83 return 1;
84 return 0;
85 }
86
87 static int is_same3(const AVFrame *frame, int x, int y,
88 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
89 {
90 unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
91 unsigned c1 = frame->data[1][y * frame->linesize[1] + x];
92 unsigned c2 = frame->data[2][y * frame->linesize[2] + x];
93
94 if (s0 == c0 && s1 == c1 && s2 == c2)
95 return 1;
96 return 0;
97 }
98
99 static int is_same3_16(const AVFrame *frame, int x, int y,
100 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
101 {
102 unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
103 unsigned c1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
104 unsigned c2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
105
106 if (s0 == c0 && s1 == c1 && s2 == c2)
107 return 1;
108 return 0;
109 }
110
111 static int is_same1(const AVFrame *frame, int x, int y,
112 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
113 {
114 unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
115
116 if (s0 == c0)
117 return 1;
118 return 0;
119 }
120
121 static int is_same1_16(const AVFrame *frame, int x, int y,
122 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
123 {
124 unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
125
126 if (s0 == c0)
127 return 1;
128 return 0;
129 }
130
131 static void set_pixel1(AVFrame *frame, int x, int y,
132 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
133 {
134 frame->data[0][y * frame->linesize[0] + x] = d0;
135 }
136
137 static void set_pixel1_16(AVFrame *frame, int x, int y,
138 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
139 {
140 AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
141 }
142
143 static void set_pixel3(AVFrame *frame, int x, int y,
144 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
145 {
146 frame->data[0][y * frame->linesize[0] + x] = d0;
147 frame->data[1][y * frame->linesize[1] + x] = d1;
148 frame->data[2][y * frame->linesize[2] + x] = d2;
149 }
150
151 static void set_pixel3_16(AVFrame *frame, int x, int y,
152 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
153 {
154 AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
155 AV_WN16(frame->data[1] + y * frame->linesize[1] + 2 * x, d1);
156 AV_WN16(frame->data[2] + y * frame->linesize[2] + 2 * x, d2);
157 }
158
159 static void set_pixel4(AVFrame *frame, int x, int y,
160 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
161 {
162 frame->data[0][y * frame->linesize[0] + x] = d0;
163 frame->data[1][y * frame->linesize[1] + x] = d1;
164 frame->data[2][y * frame->linesize[2] + x] = d2;
165 frame->data[3][y * frame->linesize[3] + x] = d3;
166 }
167
168 static void set_pixel4_16(AVFrame *frame, int x, int y,
169 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
170 {
171 AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
172 AV_WN16(frame->data[1] + y * frame->linesize[1] + 2 * x, d1);
173 AV_WN16(frame->data[2] + y * frame->linesize[2] + 2 * x, d2);
174 AV_WN16(frame->data[3] + y * frame->linesize[3] + 2 * x, d3);
175 }
176
177 static void pick_pixel1(const AVFrame *frame, int x, int y,
178 int *s0, int *s1, int *s2, int *s3)
179 {
180 if (*s0 < 0)
181 *s0 = frame->data[0][y * frame->linesize[0] + x];
182 }
183
184 static void pick_pixel1_16(const AVFrame *frame, int x, int y,
185 int *s0, int *s1, int *s2, int *s3)
186 {
187 if (*s0 < 0)
188 *s0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
189 }
190
191 static void pick_pixel3(const AVFrame *frame, int x, int y,
192 int *s0, int *s1, int *s2, int *s3)
193 {
194 if (*s0 < 0)
195 *s0 = frame->data[0][y * frame->linesize[0] + x];
196 if (*s1 < 0)
197 *s1 = frame->data[1][y * frame->linesize[1] + x];
198 if (*s2 < 0)
199 *s2 = frame->data[2][y * frame->linesize[2] + x];
200 }
201
202 static void pick_pixel3_16(const AVFrame *frame, int x, int y,
203 int *s0, int *s1, int *s2, int *s3)
204 {
205 if (*s0 < 0)
206 *s0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
207 if (*s1 < 0)
208 *s1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
209 if (*s2 < 0)
210 *s2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
211 }
212
213 static void pick_pixel4(const AVFrame *frame, int x, int y,
214 int *s0, int *s1, int *s2, int *s3)
215 {
216 if (*s0 < 0)
217 *s0 = frame->data[0][y * frame->linesize[0] + x];
218 if (*s1 < 0)
219 *s1 = frame->data[1][y * frame->linesize[1] + x];
220 if (*s2 < 0)
221 *s2 = frame->data[2][y * frame->linesize[2] + x];
222 if (*s3 < 0)
223 *s3 = frame->data[3][y * frame->linesize[3] + x];
224 }
225
226 static void pick_pixel4_16(const AVFrame *frame, int x, int y,
227 int *s0, int *s1, int *s2, int *s3)
228 {
229 if (*s0 < 0)
230 *s0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
231 if (*s1 < 0)
232 *s1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
233 if (*s2 < 0)
234 *s2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
235 if (*s3 < 0)
236 *s3 = AV_RN16(frame->data[3] + y * frame->linesize[3] + 2 * x);
237 }
238
239 static int config_input(AVFilterLink *inlink)
240 {
241 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
242 AVFilterContext *ctx = inlink->dst;
243 FloodfillContext *s = ctx->priv;
244 int depth;
245
246 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
247 depth = desc->comp[0].depth;
248 if (depth == 8) {
249 switch (s->nb_planes) {
250 case 1: s->set_pixel = set_pixel1;
251 s->is_same = is_same1;
252 s->pick_pixel = pick_pixel1; break;
253 case 3: s->set_pixel = set_pixel3;
254 s->is_same = is_same3;
255 s->pick_pixel = pick_pixel3; break;
256 case 4: s->set_pixel = set_pixel4;
257 s->is_same = is_same4;
258 s->pick_pixel = pick_pixel4; break;
259 }
260 } else {
261 switch (s->nb_planes) {
262 case 1: s->set_pixel = set_pixel1_16;
263 s->is_same = is_same1_16;
264 s->pick_pixel = pick_pixel1_16; break;
265 case 3: s->set_pixel = set_pixel3_16;
266 s->is_same = is_same3_16;
267 s->pick_pixel = pick_pixel3_16; break;
268 case 4: s->set_pixel = set_pixel4_16;
269 s->is_same = is_same4_16;
270 s->pick_pixel = pick_pixel4_16; break;
271 }
272 }
273
274 s->front = s->back = 0;
275 s->points = av_calloc(inlink->w * inlink->h, 4 * sizeof(Points));
276 if (!s->points)
277 return AVERROR(ENOMEM);
278
279 return 0;
280 }
281
282 static int filter_frame(AVFilterLink *link, AVFrame *frame)
283 {
284 AVFilterContext *ctx = link->dst;
285 FloodfillContext *s = ctx->priv;
286 const unsigned d0 = s->d[0];
287 const unsigned d1 = s->d[1];
288 const unsigned d2 = s->d[2];
289 const unsigned d3 = s->d[3];
290 int s0 = s->s[0];
291 int s1 = s->s[1];
292 int s2 = s->s[2];
293 int s3 = s->s[3];
294 const int w = frame->width;
295 const int h = frame->height;
296 int i, ret;
297
298 if (is_inside(s->x, s->y, w, h)) {
299 s->pick_pixel(frame, s->x, s->y, &s0, &s1, &s2, &s3);
300
301 s->S[0] = s0;
302 s->S[1] = s1;
303 s->S[2] = s2;
304 s->S[3] = s3;
305 for (i = 0; i < s->nb_planes; i++) {
306 if (s->S[i] != s->d[i])
307 break;
308 }
309
310 if (i == s->nb_planes)
311 goto end;
312
313 if (s->is_same(frame, s->x, s->y, s0, s1, s2, s3)) {
314 s->points[s->front].x = s->x;
315 s->points[s->front].y = s->y;
316 s->front++;
317 }
318
319 if (ret = ff_inlink_make_frame_writable(link, &frame)) {
320 av_frame_free(&frame);
321 return ret;
322 }
323
324 while (s->front > s->back) {
325 int x, y;
326
327 s->front--;
328 x = s->points[s->front].x;
329 y = s->points[s->front].y;
330
331 if (s->is_same(frame, x, y, s0, s1, s2, s3)) {
332 s->set_pixel(frame, x, y, d0, d1, d2, d3);
333
334 if (is_inside(x + 1, y, w, h)) {
335 s->points[s->front] .x = x + 1;
336 s->points[s->front++].y = y;
337 }
338
339 if (is_inside(x - 1, y, w, h)) {
340 s->points[s->front] .x = x - 1;
341 s->points[s->front++].y = y;
342 }
343
344 if (is_inside(x, y + 1, w, h)) {
345 s->points[s->front] .x = x;
346 s->points[s->front++].y = y + 1;
347 }
348
349 if (is_inside(x, y - 1, w, h)) {
350 s->points[s->front] .x = x;
351 s->points[s->front++].y = y - 1;
352 }
353 }
354 }
355 }
356
357 end:
358 return ff_filter_frame(ctx->outputs[0], frame);
359 }
360
361 static const enum AVPixelFormat pixel_fmts[] = {
362 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
363 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P,
364 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
365 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
366 AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GBRAP,
367 AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUVA444P10,
368 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUVA444P16,
369 AV_PIX_FMT_NONE
370 };
371
372 static av_cold void uninit(AVFilterContext *ctx)
373 {
374 FloodfillContext *s = ctx->priv;
375
376 av_freep(&s->points);
377 }
378
379 static const AVFilterPad floodfill_inputs[] = {
380 {
381 .name = "default",
382 .type = AVMEDIA_TYPE_VIDEO,
383 .filter_frame = filter_frame,
384 .config_props = config_input,
385 },
386 };
387
388 #define OFFSET(x) offsetof(FloodfillContext, x)
389 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
390
391 static const AVOption floodfill_options[] = {
392 { "x", "set pixel x coordinate", OFFSET(x), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
393 { "y", "set pixel y coordinate", OFFSET(y), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
394 { "s0", "set source #0 component value", OFFSET(s[0]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
395 { "s1", "set source #1 component value", OFFSET(s[1]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
396 { "s2", "set source #2 component value", OFFSET(s[2]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
397 { "s3", "set source #3 component value", OFFSET(s[3]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
398 { "d0", "set destination #0 component value", OFFSET(d[0]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
399 { "d1", "set destination #1 component value", OFFSET(d[1]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
400 { "d2", "set destination #2 component value", OFFSET(d[2]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
401 { "d3", "set destination #3 component value", OFFSET(d[3]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
402 { NULL }
403 };
404
405 AVFILTER_DEFINE_CLASS(floodfill);
406
407 const AVFilter ff_vf_floodfill = {
408 .name = "floodfill",
409 .description = NULL_IF_CONFIG_SMALL("Fill area with same color with another color."),
410 .priv_size = sizeof(FloodfillContext),
411 .priv_class = &floodfill_class,
412 .uninit = uninit,
413 FILTER_INPUTS(floodfill_inputs),
414 FILTER_OUTPUTS(ff_video_default_filterpad),
415 FILTER_PIXFMTS_ARRAY(pixel_fmts),
416 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
417 };
418