2 * Copyright (c) 2017 Paul B Mahol
4 * This file is part of FFmpeg.
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.
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.
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
21 #include "libavutil/opt.h"
22 #include "libavutil/imgutils.h"
23 #include "libavutil/intreadwrite.h"
29 typedef struct Points {
33 typedef struct FloodfillContext {
43 int (*is_same)(AVFrame *frame, int x, int y,
44 unsigned s0, unsigned s1, unsigned s2, unsigned s3);
45 void (*set_pixel)(AVFrame *frame, int x, int y,
46 unsigned d0, unsigned d1, unsigned d2, unsigned d3);
47 void (*pick_pixel)(AVFrame *frame, int x, int y,
48 int *s0, int *s1, int *s2, int *s3);
51 static int is_inside(int x, int y, int w, int h)
53 if (x >= 0 && x < w && y >= 0 && y < h)
58 static int is_same4(AVFrame *frame, int x, int y,
59 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
61 unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
62 unsigned c1 = frame->data[1][y * frame->linesize[1] + x];
63 unsigned c2 = frame->data[2][y * frame->linesize[2] + x];
64 unsigned c3 = frame->data[3][y * frame->linesize[3] + x];
66 if (s0 == c0 && s1 == c1 && s2 == c2 && s3 == c3)
71 static int is_same4_16(AVFrame *frame, int x, int y,
72 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
74 unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
75 unsigned c1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
76 unsigned c2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
77 unsigned c3 = AV_RN16(frame->data[3] + y * frame->linesize[3] + 2 * x);
79 if (s0 == c0 && s1 == c1 && s2 == c2 && s3 == c3)
84 static int is_same3(AVFrame *frame, int x, int y,
85 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
87 unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
88 unsigned c1 = frame->data[1][y * frame->linesize[1] + x];
89 unsigned c2 = frame->data[2][y * frame->linesize[2] + x];
91 if (s0 == c0 && s1 == c1 && s2 == c2)
96 static int is_same3_16(AVFrame *frame, int x, int y,
97 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
99 unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
100 unsigned c1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
101 unsigned c2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
103 if (s0 == c0 && s1 == c1 && s2 == c2)
108 static int is_same1(AVFrame *frame, int x, int y,
109 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
111 unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
118 static int is_same1_16(AVFrame *frame, int x, int y,
119 unsigned s0, unsigned s1, unsigned s2, unsigned s3)
121 unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
128 static void set_pixel1(AVFrame *frame, int x, int y,
129 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
131 frame->data[0][y * frame->linesize[0] + x] = d0;
134 static void set_pixel1_16(AVFrame *frame, int x, int y,
135 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
137 AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
140 static void set_pixel3(AVFrame *frame, int x, int y,
141 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
143 frame->data[0][y * frame->linesize[0] + x] = d0;
144 frame->data[1][y * frame->linesize[1] + x] = d1;
145 frame->data[2][y * frame->linesize[2] + x] = d2;
148 static void set_pixel3_16(AVFrame *frame, int x, int y,
149 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
151 AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
152 AV_WN16(frame->data[1] + y * frame->linesize[1] + 2 * x, d1);
153 AV_WN16(frame->data[2] + y * frame->linesize[2] + 2 * x, d2);
156 static void set_pixel4(AVFrame *frame, int x, int y,
157 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
159 frame->data[0][y * frame->linesize[0] + x] = d0;
160 frame->data[1][y * frame->linesize[1] + x] = d1;
161 frame->data[2][y * frame->linesize[2] + x] = d2;
162 frame->data[3][y * frame->linesize[3] + x] = d3;
165 static void set_pixel4_16(AVFrame *frame, int x, int y,
166 unsigned d0, unsigned d1, unsigned d2, unsigned d3)
168 AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
169 AV_WN16(frame->data[1] + y * frame->linesize[1] + 2 * x, d1);
170 AV_WN16(frame->data[2] + y * frame->linesize[2] + 2 * x, d2);
171 AV_WN16(frame->data[3] + y * frame->linesize[3] + 2 * x, d3);
174 static void pick_pixel1(AVFrame *frame, int x, int y,
175 int *s0, int *s1, int *s2, int *s3)
178 *s0 = frame->data[0][y * frame->linesize[0] + x];
181 static void pick_pixel1_16(AVFrame *frame, int x, int y,
182 int *s0, int *s1, int *s2, int *s3)
185 *s0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
188 static void pick_pixel3(AVFrame *frame, int x, int y,
189 int *s0, int *s1, int *s2, int *s3)
192 *s0 = frame->data[0][y * frame->linesize[0] + x];
194 *s1 = frame->data[1][y * frame->linesize[1] + x];
196 *s2 = frame->data[2][y * frame->linesize[2] + x];
199 static void pick_pixel3_16(AVFrame *frame, int x, int y,
200 int *s0, int *s1, int *s2, int *s3)
203 *s0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
205 *s1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
207 *s2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
210 static void pick_pixel4(AVFrame *frame, int x, int y,
211 int *s0, int *s1, int *s2, int *s3)
214 *s0 = frame->data[0][y * frame->linesize[0] + x];
216 *s1 = frame->data[1][y * frame->linesize[1] + x];
218 *s2 = frame->data[2][y * frame->linesize[2] + x];
220 *s3 = frame->data[3][y * frame->linesize[3] + x];
223 static void pick_pixel4_16(AVFrame *frame, int x, int y,
224 int *s0, int *s1, int *s2, int *s3)
227 *s0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
229 *s1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
231 *s2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
233 *s3 = AV_RN16(frame->data[3] + y * frame->linesize[3] + 2 * x);
236 static int config_input(AVFilterLink *inlink)
238 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
239 AVFilterContext *ctx = inlink->dst;
240 FloodfillContext *s = ctx->priv;
241 int nb_planes = av_pix_fmt_count_planes(inlink->format);
244 depth = desc->comp[0].depth;
247 case 1: s->set_pixel = set_pixel1;
248 s->is_same = is_same1;
249 s->pick_pixel = pick_pixel1; break;
250 case 3: s->set_pixel = set_pixel3;
251 s->is_same = is_same3;
252 s->pick_pixel = pick_pixel3; break;
253 case 4: s->set_pixel = set_pixel4;
254 s->is_same = is_same4;
255 s->pick_pixel = pick_pixel4; break;
259 case 1: s->set_pixel = set_pixel1_16;
260 s->is_same = is_same1_16;
261 s->pick_pixel = pick_pixel1_16; break;
262 case 3: s->set_pixel = set_pixel3_16;
263 s->is_same = is_same3_16;
264 s->pick_pixel = pick_pixel3_16; break;
265 case 4: s->set_pixel = set_pixel4_16;
266 s->is_same = is_same4_16;
267 s->pick_pixel = pick_pixel4_16; break;
271 s->front = s->back = 0;
272 s->points = av_calloc(inlink->w * inlink->h, 4 * sizeof(Points));
274 return AVERROR(ENOMEM);
279 static int filter_frame(AVFilterLink *link, AVFrame *frame)
281 AVFilterContext *ctx = link->dst;
282 FloodfillContext *s = ctx->priv;
283 const unsigned d0 = s->d0;
284 const unsigned d1 = s->d1;
285 const unsigned d2 = s->d2;
286 const unsigned d3 = s->d3;
291 const int w = frame->width;
292 const int h = frame->height;
295 if (ret = av_frame_make_writable(frame))
298 if (is_inside(s->x, s->y, w, h)) {
299 s->pick_pixel(frame, s->x, s->y, &s0, &s1, &s2, &s3);
301 if (s->is_same(frame, s->x, s->y, s0, s1, s2, s3)) {
302 s->points[s->front].x = s->x;
303 s->points[s->front].y = s->y;
307 while (s->front > s->back) {
311 x = s->points[s->front].x;
312 y = s->points[s->front].y;
314 if (s->is_same(frame, x, y, s0, s1, s2, s3)) {
315 s->set_pixel(frame, x, y, d0, d1, d2, d3);
317 if (is_inside(x + 1, y, w, h)) {
318 s->points[s->front] .x = x + 1;
319 s->points[s->front++].y = y;
322 if (is_inside(x - 1, y, w, h)) {
323 s->points[s->front] .x = x - 1;
324 s->points[s->front++].y = y;
327 if (is_inside(x, y + 1, w, h)) {
328 s->points[s->front] .x = x;
329 s->points[s->front++].y = y + 1;
332 if (is_inside(x, y - 1, w, h)) {
333 s->points[s->front] .x = x;
334 s->points[s->front++].y = y - 1;
340 return ff_filter_frame(ctx->outputs[0], frame);
343 static av_cold int query_formats(AVFilterContext *ctx)
345 static const enum AVPixelFormat pixel_fmts[] = {
360 AV_PIX_FMT_YUVA444P9,
361 AV_PIX_FMT_YUV444P10,
362 AV_PIX_FMT_YUVA444P10,
363 AV_PIX_FMT_YUV444P12,
364 AV_PIX_FMT_YUV444P14,
366 AV_PIX_FMT_YUV444P16,
367 AV_PIX_FMT_YUVA444P16,
370 AVFilterFormats *formats;
372 formats = ff_make_format_list(pixel_fmts);
374 return AVERROR(ENOMEM);
376 return ff_set_common_formats(ctx, formats);
379 static av_cold void uninit(AVFilterContext *ctx)
381 FloodfillContext *s = ctx->priv;
383 av_freep(&s->points);
386 static const AVFilterPad floodfill_inputs[] = {
389 .type = AVMEDIA_TYPE_VIDEO,
390 .filter_frame = filter_frame,
391 .config_props = config_input,
396 static const AVFilterPad floodfill_outputs[] = {
399 .type = AVMEDIA_TYPE_VIDEO,
404 #define OFFSET(x) offsetof(FloodfillContext, x)
405 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
407 static const AVOption floodfill_options[] = {
408 { "x", "set pixel x coordinate", OFFSET(x), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
409 { "y", "set pixel y coordinate", OFFSET(y), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
410 { "s0", "set source #0 component value", OFFSET(s0), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
411 { "s1", "set source #1 component value", OFFSET(s1), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
412 { "s2", "set source #2 component value", OFFSET(s2), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
413 { "s3", "set source #3 component value", OFFSET(s3), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
414 { "d0", "set destination #0 component value", OFFSET(d0), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
415 { "d1", "set destination #1 component value", OFFSET(d1), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
416 { "d2", "set destination #2 component value", OFFSET(d2), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
417 { "d3", "set destination #3 component value", OFFSET(d3), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
421 AVFILTER_DEFINE_CLASS(floodfill);
423 AVFilter ff_vf_floodfill = {
425 .description = NULL_IF_CONFIG_SMALL("Fill area with same color with another color."),
426 .priv_size = sizeof(FloodfillContext),
427 .priv_class = &floodfill_class,
428 .query_formats = query_formats,
430 .inputs = floodfill_inputs,
431 .outputs = floodfill_outputs,
432 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,