FFmpeg
vf_floodfill.c
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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)(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)(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(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(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(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(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(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(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(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(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(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(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(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(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 av_cold int query_formats(AVFilterContext *ctx)
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  AVFilterFormats *formats;
371 
372  formats = ff_make_format_list(pixel_fmts);
373  if (!formats)
374  return AVERROR(ENOMEM);
375 
376  return ff_set_common_formats(ctx, formats);
377 }
378 
379 static av_cold void uninit(AVFilterContext *ctx)
380 {
381  FloodfillContext *s = ctx->priv;
382 
383  av_freep(&s->points);
384 }
385 
386 static const AVFilterPad floodfill_inputs[] = {
387  {
388  .name = "default",
389  .type = AVMEDIA_TYPE_VIDEO,
390  .filter_frame = filter_frame,
391  .config_props = config_input,
392  },
393  { NULL }
394 };
395 
396 static const AVFilterPad floodfill_outputs[] = {
397  {
398  .name = "default",
399  .type = AVMEDIA_TYPE_VIDEO,
400  },
401  { NULL }
402 };
403 
404 #define OFFSET(x) offsetof(FloodfillContext, x)
405 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
406 
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(s[0]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
411  { "s1", "set source #1 component value", OFFSET(s[1]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
412  { "s2", "set source #2 component value", OFFSET(s[2]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
413  { "s3", "set source #3 component value", OFFSET(s[3]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
414  { "d0", "set destination #0 component value", OFFSET(d[0]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
415  { "d1", "set destination #1 component value", OFFSET(d[1]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
416  { "d2", "set destination #2 component value", OFFSET(d[2]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
417  { "d3", "set destination #3 component value", OFFSET(d[3]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
418  { NULL }
419 };
420 
421 AVFILTER_DEFINE_CLASS(floodfill);
422 
423 AVFilter ff_vf_floodfill = {
424  .name = "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,
429  .uninit = uninit,
430  .inputs = floodfill_inputs,
431  .outputs = floodfill_outputs,
432  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
433 };
FloodfillContext::pick_pixel
void(* pick_pixel)(AVFrame *frame, int x, int y, int *s0, int *s1, int *s2, int *s3)
Definition: vf_floodfill.c:49
NULL
#define NULL
Definition: coverity.c:32
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2549
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
h
h
Definition: vp9dsp_template.c:2038
AVOption
AVOption.
Definition: opt.h:246
AV_PIX_FMT_YUV444P14
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:407
AV_PIX_FMT_GBRAP10
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:417
ff_vf_floodfill
AVFilter ff_vf_floodfill
Definition: vf_floodfill.c:423
ret
ret
Definition: filter_design.txt:187
AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
imgutils.h
misc image utilities
floodfill_outputs
static const AVFilterPad floodfill_outputs[]
Definition: vf_floodfill.c:396
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2589
avfilter.h
Main libavfilter public API header.
desc
const char * desc
Definition: nvenc.c:68
AV_OPT_TYPE_INT
Definition: opt.h:223
AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
AV_PIX_FMT_GBRP10
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:413
AV_PIX_FMT_GRAY9
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:377
is_inside
static int is_inside(int x, int y, int w, int h)
Definition: vf_floodfill.c:53
pick_pixel4_16
static void pick_pixel4_16(AVFrame *frame, int x, int y, int *s0, int *s1, int *s2, int *s3)
Definition: vf_floodfill.c:225
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:244
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
AV_PIX_FMT_GRAY10
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:378
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:125
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1075
is_same1_16
static int is_same1_16(AVFrame *frame, int x, int y, unsigned s0, unsigned s1, unsigned s2, unsigned s3)
Definition: vf_floodfill.c:120
AVPixFmtDescriptor::comp
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
av_cold
#define av_cold
Definition: attributes.h:82
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_floodfill.c:238
opt.h
AVOptions.
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
AV_PIX_FMT_GBRP9
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:412
c1
static const uint64_t c1
Definition: murmur3.c:49
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:410
pick_pixel3_16
static void pick_pixel3_16(AVFrame *frame, int x, int y, int *s0, int *s1, int *s2, int *s3)
Definition: vf_floodfill.c:201
is_same4
static int is_same4(AVFrame *frame, int x, int y, unsigned s0, unsigned s1, unsigned s2, unsigned s3)
Definition: vf_floodfill.c:60
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
AVFrame::width
int width
Definition: frame.h:353
ff_set_common_formats
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:569
s2
#define s2
Definition: regdef.h:39
S
#define S(s, c, i)
Definition: flacdsp_template.c:46
set_pixel4_16
static void set_pixel4_16(AVFrame *frame, int x, int y, unsigned d0, unsigned d1, unsigned d2, unsigned d3)
Definition: vf_floodfill.c:167
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:353
s0
#define s0
Definition: regdef.h:37
AV_PIX_FMT_YUVA444P16
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:441
AV_PIX_FMT_GBRAP12
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:418
FloodfillContext::set_pixel
void(* set_pixel)(AVFrame *frame, int x, int y, unsigned d0, unsigned d1, unsigned d2, unsigned d3)
Definition: vf_floodfill.c:47
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:400
set_pixel4
static void set_pixel4(AVFrame *frame, int x, int y, unsigned d0, unsigned d1, unsigned d2, unsigned d3)
Definition: vf_floodfill.c:158
pick_pixel1
static void pick_pixel1(AVFrame *frame, int x, int y, int *s0, int *s1, int *s2, int *s3)
Definition: vf_floodfill.c:176
AV_PIX_FMT_GBRAP16
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:419
AV_PIX_FMT_GBRP16
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:416
AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:381
FLAGS
#define FLAGS
Definition: vf_floodfill.c:405
is_same3_16
static int is_same3_16(AVFrame *frame, int x, int y, unsigned s0, unsigned s1, unsigned s2, unsigned s3)
Definition: vf_floodfill.c:98
w
uint8_t w
Definition: llviddspenc.c:38
void
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
ctx
AVFormatContext * ctx
Definition: movenc.c:48
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:255
s
#define s(width, name)
Definition: cbs_vp9.c:257
AV_PIX_FMT_YUVA444P10
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:436
AV_PIX_FMT_YUV444P9
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:396
AV_PIX_FMT_GBRP14
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:415
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(floodfill)
s3
#define s3
Definition: regdef.h:40
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
filter_frame
static int filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: vf_floodfill.c:281
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:177
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
AV_PIX_FMT_GRAY14
#define AV_PIX_FMT_GRAY14
Definition: pixfmt.h:380
AV_RN16
#define AV_RN16(p)
Definition: intreadwrite.h:360
inputs
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:243
set_pixel1
static void set_pixel1(AVFrame *frame, int x, int y, unsigned d0, unsigned d1, unsigned d2, unsigned d3)
Definition: vf_floodfill.c:130
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AVFilter
Filter definition.
Definition: avfilter.h:144
Points::x
uint16_t x
Definition: vf_floodfill.c:30
is_same3
static int is_same3(AVFrame *frame, int x, int y, unsigned s0, unsigned s1, unsigned s2, unsigned s3)
Definition: vf_floodfill.c:86
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:148
link
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a link
Definition: filter_design.txt:23
s1
#define s1
Definition: regdef.h:38
OFFSET
#define OFFSET(x)
Definition: vf_floodfill.c:404
AVFilterContext::outputs
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
AV_PIX_FMT_GBRP12
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:414
av_frame_make_writable
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
Definition: frame.c:612
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:564
AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:404
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:207
is_same4_16
static int is_same4_16(AVFrame *frame, int x, int y, unsigned s0, unsigned s1, unsigned s2, unsigned s3)
Definition: vf_floodfill.c:73
set_pixel3
static void set_pixel3(AVFrame *frame, int x, int y, unsigned d0, unsigned d1, unsigned d2, unsigned d3)
Definition: vf_floodfill.c:142
int
int
Definition: ffmpeg_filter.c:191
pick_pixel1_16
static void pick_pixel1_16(AVFrame *frame, int x, int y, int *s0, int *s1, int *s2, int *s3)
Definition: vf_floodfill.c:183
AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
pick_pixel4
static void pick_pixel4(AVFrame *frame, int x, int y, int *s0, int *s1, int *s2, int *s3)
Definition: vf_floodfill.c:212
AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
AV_PIX_FMT_YUVA444P9
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:433
c2
static const uint64_t c2
Definition: murmur3.c:50
pick_pixel3
static void pick_pixel3(AVFrame *frame, int x, int y, int *s0, int *s1, int *s2, int *s3)
Definition: vf_floodfill.c:190
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
AVFilterContext
An instance of a filter.
Definition: avfilter.h:338
AVFrame::height
int height
Definition: frame.h:353
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AV_WN16
#define AV_WN16(p, v)
Definition: intreadwrite.h:372
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
floodfill_options
static const AVOption floodfill_options[]
Definition: vf_floodfill.c:407
Points::y
uint16_t y
Definition: vf_floodfill.c:30
FloodfillContext::is_same
int(* is_same)(AVFrame *frame, int x, int y, unsigned s0, unsigned s1, unsigned s2, unsigned s3)
Definition: vf_floodfill.c:45
is_same1
static int is_same1(AVFrame *frame, int x, int y, unsigned s0, unsigned s1, unsigned s2, unsigned s3)
Definition: vf_floodfill.c:110
formats
formats
Definition: signature.h:48
floodfill_inputs
static const AVFilterPad floodfill_inputs[]
Definition: vf_floodfill.c:386
internal.h
internal API functions
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
set_pixel1_16
static void set_pixel1_16(AVFrame *frame, int x, int y, unsigned d0, unsigned d1, unsigned d2, unsigned d3)
Definition: vf_floodfill.c:136
set_pixel3_16
static void set_pixel3_16(AVFrame *frame, int x, int y, unsigned d0, unsigned d1, unsigned d2, unsigned d3)
Definition: vf_floodfill.c:150
AVComponentDescriptor::depth
int depth
Number of bits in the component.
Definition: pixdesc.h:58
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
query_formats
static av_cold int query_formats(AVFilterContext *ctx)
Definition: vf_floodfill.c:358
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_floodfill.c:379
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