libavfilter/vf_floodfill.c - manifest_repos/ffmpeg - Git at Google

 /*
  * Copyright (c) 2017 Paul B Mahol
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */

 #include "libavutil/opt.h"
 #include "libavutil/imgutils.h"
 #include "libavutil/intreadwrite.h"
 #include "avfilter.h"
 #include "formats.h"
 #include "internal.h"
 #include "video.h"

 typedef struct Points {
     uint16_t x, y;
 } Points;

 typedef struct FloodfillContext {
     const AVClass *class;

     int x, y;
     int s[4];
     int S[4];
     int d[4];

     int nb_planes;
     int back, front;
     Points *points;

     int (*is_same)(AVFrame *frame, int x, int y,
                    unsigned s0, unsigned s1, unsigned s2, unsigned s3);
     void (*set_pixel)(AVFrame *frame, int x, int y,
                       unsigned d0, unsigned d1, unsigned d2, unsigned d3);
     void (*pick_pixel)(AVFrame *frame, int x, int y,
                        int *s0, int *s1, int *s2, int *s3);
 } FloodfillContext;

 static int is_inside(int x, int y, int w, int h)
 {
     if (x >= 0 && x < w && y >= 0 && y < h)
         return 1;
     return 0;
 }

 static int is_same4(AVFrame *frame, int x, int y,
                     unsigned s0, unsigned s1, unsigned s2, unsigned s3)
 {
     unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
     unsigned c1 = frame->data[1][y * frame->linesize[1] + x];
     unsigned c2 = frame->data[2][y * frame->linesize[2] + x];
     unsigned c3 = frame->data[3][y * frame->linesize[3] + x];

     if (s0 == c0 && s1 == c1 && s2 == c2 && s3 == c3)
         return 1;
     return 0;
 }

 static int is_same4_16(AVFrame *frame, int x, int y,
                        unsigned s0, unsigned s1, unsigned s2, unsigned s3)
 {
     unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
     unsigned c1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
     unsigned c2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
     unsigned c3 = AV_RN16(frame->data[3] + y * frame->linesize[3] + 2 * x);

     if (s0 == c0 && s1 == c1 && s2 == c2 && s3 == c3)
         return 1;
     return 0;
 }

 static int is_same3(AVFrame *frame, int x, int y,
                     unsigned s0, unsigned s1, unsigned s2, unsigned s3)
 {
     unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
     unsigned c1 = frame->data[1][y * frame->linesize[1] + x];
     unsigned c2 = frame->data[2][y * frame->linesize[2] + x];

     if (s0 == c0 && s1 == c1 && s2 == c2)
         return 1;
     return 0;
 }

 static int is_same3_16(AVFrame *frame, int x, int y,
                        unsigned s0, unsigned s1, unsigned s2, unsigned s3)
 {
     unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
     unsigned c1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
     unsigned c2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);

     if (s0 == c0 && s1 == c1 && s2 == c2)
         return 1;
     return 0;
 }

 static int is_same1(AVFrame *frame, int x, int y,
                     unsigned s0, unsigned s1, unsigned s2, unsigned s3)
 {
     unsigned c0 = frame->data[0][y * frame->linesize[0] + x];

     if (s0 == c0)
         return 1;
     return 0;
 }

 static int is_same1_16(AVFrame *frame, int x, int y,
                        unsigned s0, unsigned s1, unsigned s2, unsigned s3)
 {
     unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);

     if (s0 == c0)
         return 1;
     return 0;
 }

 static void set_pixel1(AVFrame *frame, int x, int y,
                        unsigned d0, unsigned d1, unsigned d2, unsigned d3)
 {
     frame->data[0][y * frame->linesize[0] + x] = d0;
 }

 static void set_pixel1_16(AVFrame *frame, int x, int y,
                           unsigned d0, unsigned d1, unsigned d2, unsigned d3)
 {
     AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
 }

 static void set_pixel3(AVFrame *frame, int x, int y,
                        unsigned d0, unsigned d1, unsigned d2, unsigned d3)
 {
     frame->data[0][y * frame->linesize[0] + x] = d0;
     frame->data[1][y * frame->linesize[1] + x] = d1;
     frame->data[2][y * frame->linesize[2] + x] = d2;
 }

 static void set_pixel3_16(AVFrame *frame, int x, int y,
                           unsigned d0, unsigned d1, unsigned d2, unsigned d3)
 {
     AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
     AV_WN16(frame->data[1] + y * frame->linesize[1] + 2 * x, d1);
     AV_WN16(frame->data[2] + y * frame->linesize[2] + 2 * x, d2);
 }

 static void set_pixel4(AVFrame *frame, int x, int y,
                        unsigned d0, unsigned d1, unsigned d2, unsigned d3)
 {
     frame->data[0][y * frame->linesize[0] + x] = d0;
     frame->data[1][y * frame->linesize[1] + x] = d1;
     frame->data[2][y * frame->linesize[2] + x] = d2;
     frame->data[3][y * frame->linesize[3] + x] = d3;
 }

 static void set_pixel4_16(AVFrame *frame, int x, int y,
                           unsigned d0, unsigned d1, unsigned d2, unsigned d3)
 {
     AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
     AV_WN16(frame->data[1] + y * frame->linesize[1] + 2 * x, d1);
     AV_WN16(frame->data[2] + y * frame->linesize[2] + 2 * x, d2);
     AV_WN16(frame->data[3] + y * frame->linesize[3] + 2 * x, d3);
 }

 static void pick_pixel1(AVFrame *frame, int x, int y,
                         int *s0, int *s1, int *s2, int *s3)
 {
     if (*s0 < 0)
         *s0 = frame->data[0][y * frame->linesize[0] + x];
 }

 static void pick_pixel1_16(AVFrame *frame, int x, int y,
                            int *s0, int *s1, int *s2, int *s3)
 {
     if (*s0 < 0)
         *s0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
 }

 static void pick_pixel3(AVFrame *frame, int x, int y,
                         int *s0, int *s1, int *s2, int *s3)
 {
     if (*s0 < 0)
         *s0 = frame->data[0][y * frame->linesize[0] + x];
     if (*s1 < 0)
         *s1 = frame->data[1][y * frame->linesize[1] + x];
     if (*s2 < 0)
         *s2 = frame->data[2][y * frame->linesize[2] + x];
 }

 static void pick_pixel3_16(AVFrame *frame, int x, int y,
                            int *s0, int *s1, int *s2, int *s3)
 {
     if (*s0 < 0)
         *s0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
     if (*s1 < 0)
         *s1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
     if (*s2 < 0)
         *s2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
 }

 static void pick_pixel4(AVFrame *frame, int x, int y,
                         int *s0, int *s1, int *s2, int *s3)
 {
     if (*s0 < 0)
         *s0 = frame->data[0][y * frame->linesize[0] + x];
     if (*s1 < 0)
         *s1 = frame->data[1][y * frame->linesize[1] + x];
     if (*s2 < 0)
         *s2 = frame->data[2][y * frame->linesize[2] + x];
     if (*s3 < 0)
         *s3 = frame->data[3][y * frame->linesize[3] + x];
 }

 static void pick_pixel4_16(AVFrame *frame, int x, int y,
                            int *s0, int *s1, int *s2, int *s3)
 {
     if (*s0 < 0)
         *s0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
     if (*s1 < 0)
         *s1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
     if (*s2 < 0)
         *s2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
     if (*s3 < 0)
         *s3 = AV_RN16(frame->data[3] + y * frame->linesize[3] + 2 * x);
 }

 static int config_input(AVFilterLink *inlink)
 {
     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
     AVFilterContext *ctx = inlink->dst;
     FloodfillContext *s = ctx->priv;
     int depth;

     s->nb_planes = av_pix_fmt_count_planes(inlink->format);
     depth = desc->comp[0].depth;
     if (depth == 8) {
         switch (s->nb_planes) {
         case 1: s->set_pixel  = set_pixel1;
                 s->is_same    = is_same1;
                 s->pick_pixel = pick_pixel1; break;
         case 3: s->set_pixel  = set_pixel3;
                 s->is_same    = is_same3;
                 s->pick_pixel = pick_pixel3; break;
         case 4: s->set_pixel  = set_pixel4;
                 s->is_same    = is_same4;
                 s->pick_pixel = pick_pixel4; break;
        }
     } else {
         switch (s->nb_planes) {
         case 1: s->set_pixel  = set_pixel1_16;
                 s->is_same    = is_same1_16;
                 s->pick_pixel = pick_pixel1_16; break;
         case 3: s->set_pixel  = set_pixel3_16;
                 s->is_same    = is_same3_16;
                 s->pick_pixel = pick_pixel3_16; break;
         case 4: s->set_pixel  = set_pixel4_16;
                 s->is_same    = is_same4_16;
                 s->pick_pixel = pick_pixel4_16; break;
        }
     }

     s->front = s->back = 0;
     s->points = av_calloc(inlink->w * inlink->h, 4 * sizeof(Points));
     if (!s->points)
         return AVERROR(ENOMEM);

     return 0;
 }

 static int filter_frame(AVFilterLink *link, AVFrame *frame)
 {
     AVFilterContext *ctx = link->dst;
     FloodfillContext *s = ctx->priv;
     const unsigned d0 = s->d[0];
     const unsigned d1 = s->d[1];
     const unsigned d2 = s->d[2];
     const unsigned d3 = s->d[3];
     int s0 = s->s[0];
     int s1 = s->s[1];
     int s2 = s->s[2];
     int s3 = s->s[3];
     const int w = frame->width;
     const int h = frame->height;
     int i, ret;

     if (is_inside(s->x, s->y, w, h)) {
         s->pick_pixel(frame, s->x, s->y, &s0, &s1, &s2, &s3);

         s->S[0] = s0;
         s->S[1] = s1;
         s->S[2] = s2;
         s->S[3] = s3;
         for (i = 0; i < s->nb_planes; i++) {
             if (s->S[i] != s->d[i])
                 break;
         }

         if (i == s->nb_planes)
             goto end;

         if (s->is_same(frame, s->x, s->y, s0, s1, s2, s3)) {
             s->points[s->front].x = s->x;
             s->points[s->front].y = s->y;
             s->front++;
         }

         if (ret = av_frame_make_writable(frame))
             return ret;

         while (s->front > s->back) {
             int x, y;

             s->front--;
             x = s->points[s->front].x;
             y = s->points[s->front].y;

             if (s->is_same(frame, x, y, s0, s1, s2, s3)) {
                 s->set_pixel(frame, x, y, d0, d1, d2, d3);

                 if (is_inside(x + 1, y, w, h)) {
                     s->points[s->front]  .x = x + 1;
                     s->points[s->front++].y = y;
                 }

                 if (is_inside(x - 1, y, w, h)) {
                     s->points[s->front]  .x = x - 1;
                     s->points[s->front++].y = y;
                 }

                 if (is_inside(x, y + 1, w, h)) {
                     s->points[s->front]  .x = x;
                     s->points[s->front++].y = y + 1;
                 }

                 if (is_inside(x, y - 1, w, h)) {
                     s->points[s->front]  .x = x;
                     s->points[s->front++].y = y - 1;
                 }
             }
         }
     }

 end:
     return ff_filter_frame(ctx->outputs[0], frame);
 }

 static av_cold int query_formats(AVFilterContext *ctx)
 {
     static const enum AVPixelFormat pixel_fmts[] = {
         AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
         AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P,
         AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
         AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
         AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GBRAP,
         AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUVA444P10,
         AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUVA444P16,
         AV_PIX_FMT_NONE
     };
     AVFilterFormats *formats;

     formats = ff_make_format_list(pixel_fmts);
     if (!formats)
         return AVERROR(ENOMEM);

     return ff_set_common_formats(ctx, formats);
 }

 static av_cold void uninit(AVFilterContext *ctx)
 {
     FloodfillContext *s = ctx->priv;

     av_freep(&s->points);
 }

 static const AVFilterPad floodfill_inputs[] = {
     {
         .name         = "default",
         .type         = AVMEDIA_TYPE_VIDEO,
         .filter_frame = filter_frame,
         .config_props = config_input,
     },
     { NULL }
 };

 static const AVFilterPad floodfill_outputs[] = {
     {
         .name = "default",
         .type = AVMEDIA_TYPE_VIDEO,
     },
     { NULL }
 };

 #define OFFSET(x) offsetof(FloodfillContext, x)
 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

 static const AVOption floodfill_options[] = {
     { "x",  "set pixel x coordinate",             OFFSET(x),    AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
     { "y",  "set pixel y coordinate",             OFFSET(y),    AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
     { "s0", "set source #0 component value",      OFFSET(s[0]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
     { "s1", "set source #1 component value",      OFFSET(s[1]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
     { "s2", "set source #2 component value",      OFFSET(s[2]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
     { "s3", "set source #3 component value",      OFFSET(s[3]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
     { "d0", "set destination #0 component value", OFFSET(d[0]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
     { "d1", "set destination #1 component value", OFFSET(d[1]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
     { "d2", "set destination #2 component value", OFFSET(d[2]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
     { "d3", "set destination #3 component value", OFFSET(d[3]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
     { NULL }
 };

 AVFILTER_DEFINE_CLASS(floodfill);

 AVFilter ff_vf_floodfill = {
     .name          = "floodfill",
     .description   = NULL_IF_CONFIG_SMALL("Fill area with same color with another color."),
     .priv_size     = sizeof(FloodfillContext),
     .priv_class    = &floodfill_class,
     .query_formats = query_formats,
     .uninit        = uninit,
     .inputs        = floodfill_inputs,
     .outputs       = floodfill_outputs,
     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
 };
	/*
	* Copyright (c) 2017 Paul B Mahol
	*
	* This file is part of FFmpeg.
	*
	* FFmpeg is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* FFmpeg is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with FFmpeg; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	#include "libavutil/opt.h"
	#include "libavutil/imgutils.h"
	#include "libavutil/intreadwrite.h"
	#include "avfilter.h"
	#include "formats.h"
	#include "internal.h"
	#include "video.h"

	typedef struct Points {
	uint16_t x, y;
	} Points;

	typedef struct FloodfillContext {
	const AVClass *class;

	int x, y;
	int s[4];
	int S[4];
	int d[4];

	int nb_planes;
	int back, front;
	Points *points;

	int (is_same)(AVFrame frame, int x, int y,
	unsigned s0, unsigned s1, unsigned s2, unsigned s3);
	void (set_pixel)(AVFrame frame, int x, int y,
	unsigned d0, unsigned d1, unsigned d2, unsigned d3);
	void (pick_pixel)(AVFrame frame, int x, int y,
	int s0, int s1, int s2, int s3);
	} FloodfillContext;

	static int is_inside(int x, int y, int w, int h)
	{
	if (x >= 0 && x < w && y >= 0 && y < h)
	return 1;
	return 0;
	}

	static int is_same4(AVFrame *frame, int x, int y,
	unsigned s0, unsigned s1, unsigned s2, unsigned s3)
	{
	unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
	unsigned c1 = frame->data[1][y * frame->linesize[1] + x];
	unsigned c2 = frame->data[2][y * frame->linesize[2] + x];
	unsigned c3 = frame->data[3][y * frame->linesize[3] + x];

	if (s0 == c0 && s1 == c1 && s2 == c2 && s3 == c3)
	return 1;
	return 0;
	}

	static int is_same4_16(AVFrame *frame, int x, int y,
	unsigned s0, unsigned s1, unsigned s2, unsigned s3)
	{
	unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
	unsigned c1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
	unsigned c2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);
	unsigned c3 = AV_RN16(frame->data[3] + y * frame->linesize[3] + 2 * x);

	if (s0 == c0 && s1 == c1 && s2 == c2 && s3 == c3)
	return 1;
	return 0;
	}

	static int is_same3(AVFrame *frame, int x, int y,
	unsigned s0, unsigned s1, unsigned s2, unsigned s3)
	{
	unsigned c0 = frame->data[0][y * frame->linesize[0] + x];
	unsigned c1 = frame->data[1][y * frame->linesize[1] + x];
	unsigned c2 = frame->data[2][y * frame->linesize[2] + x];

	if (s0 == c0 && s1 == c1 && s2 == c2)
	return 1;
	return 0;
	}

	static int is_same3_16(AVFrame *frame, int x, int y,
	unsigned s0, unsigned s1, unsigned s2, unsigned s3)
	{
	unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);
	unsigned c1 = AV_RN16(frame->data[1] + y * frame->linesize[1] + 2 * x);
	unsigned c2 = AV_RN16(frame->data[2] + y * frame->linesize[2] + 2 * x);

	if (s0 == c0 && s1 == c1 && s2 == c2)
	return 1;
	return 0;
	}

	static int is_same1(AVFrame *frame, int x, int y,
	unsigned s0, unsigned s1, unsigned s2, unsigned s3)
	{
	unsigned c0 = frame->data[0][y * frame->linesize[0] + x];

	if (s0 == c0)
	return 1;
	return 0;
	}

	static int is_same1_16(AVFrame *frame, int x, int y,
	unsigned s0, unsigned s1, unsigned s2, unsigned s3)
	{
	unsigned c0 = AV_RN16(frame->data[0] + y * frame->linesize[0] + 2 * x);

	if (s0 == c0)
	return 1;
	return 0;
	}

	static void set_pixel1(AVFrame *frame, int x, int y,
	unsigned d0, unsigned d1, unsigned d2, unsigned d3)
	{
	frame->data[0][y * frame->linesize[0] + x] = d0;
	}

	static void set_pixel1_16(AVFrame *frame, int x, int y,
	unsigned d0, unsigned d1, unsigned d2, unsigned d3)
	{
	AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
	}

	static void set_pixel3(AVFrame *frame, int x, int y,
	unsigned d0, unsigned d1, unsigned d2, unsigned d3)
	{
	frame->data[0][y * frame->linesize[0] + x] = d0;
	frame->data[1][y * frame->linesize[1] + x] = d1;
	frame->data[2][y * frame->linesize[2] + x] = d2;
	}

	static void set_pixel3_16(AVFrame *frame, int x, int y,
	unsigned d0, unsigned d1, unsigned d2, unsigned d3)
	{
	AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
	AV_WN16(frame->data[1] + y * frame->linesize[1] + 2 * x, d1);
	AV_WN16(frame->data[2] + y * frame->linesize[2] + 2 * x, d2);
	}

	static void set_pixel4(AVFrame *frame, int x, int y,
	unsigned d0, unsigned d1, unsigned d2, unsigned d3)
	{
	frame->data[0][y * frame->linesize[0] + x] = d0;
	frame->data[1][y * frame->linesize[1] + x] = d1;
	frame->data[2][y * frame->linesize[2] + x] = d2;
	frame->data[3][y * frame->linesize[3] + x] = d3;
	}

	static void set_pixel4_16(AVFrame *frame, int x, int y,
	unsigned d0, unsigned d1, unsigned d2, unsigned d3)
	{
	AV_WN16(frame->data[0] + y * frame->linesize[0] + 2 * x, d0);
	AV_WN16(frame->data[1] + y * frame->linesize[1] + 2 * x, d1);
	AV_WN16(frame->data[2] + y * frame->linesize[2] + 2 * x, d2);
	AV_WN16(frame->data[3] + y * frame->linesize[3] + 2 * x, d3);
	}

	static void pick_pixel1(AVFrame *frame, int x, int y,
	int s0, int s1, int s2, int s3)
	{
	if (*s0 < 0)
	s0 = frame->data[0][y frame->linesize[0] + x];
	}

	static void pick_pixel1_16(AVFrame *frame, int x, int y,
	int s0, int s1, int s2, int s3)
	{
	if (*s0 < 0)
	s0 = AV_RN16(frame->data[0] + y frame->linesize[0] + 2 * x);
	}

	static void pick_pixel3(AVFrame *frame, int x, int y,
	int s0, int s1, int s2, int s3)
	{
	if (*s0 < 0)
	s0 = frame->data[0][y frame->linesize[0] + x];
	if (*s1 < 0)
	s1 = frame->data[1][y frame->linesize[1] + x];
	if (*s2 < 0)
	s2 = frame->data[2][y frame->linesize[2] + x];
	}

	static void pick_pixel3_16(AVFrame *frame, int x, int y,
	int s0, int s1, int s2, int s3)
	{
	if (*s0 < 0)
	s0 = AV_RN16(frame->data[0] + y frame->linesize[0] + 2 * x);
	if (*s1 < 0)
	s1 = AV_RN16(frame->data[1] + y frame->linesize[1] + 2 * x);
	if (*s2 < 0)
	s2 = AV_RN16(frame->data[2] + y frame->linesize[2] + 2 * x);
	}

	static void pick_pixel4(AVFrame *frame, int x, int y,
	int s0, int s1, int s2, int s3)
	{
	if (*s0 < 0)
	s0 = frame->data[0][y frame->linesize[0] + x];
	if (*s1 < 0)
	s1 = frame->data[1][y frame->linesize[1] + x];
	if (*s2 < 0)
	s2 = frame->data[2][y frame->linesize[2] + x];
	if (*s3 < 0)
	s3 = frame->data[3][y frame->linesize[3] + x];
	}

	static void pick_pixel4_16(AVFrame *frame, int x, int y,
	int s0, int s1, int s2, int s3)
	{
	if (*s0 < 0)
	s0 = AV_RN16(frame->data[0] + y frame->linesize[0] + 2 * x);
	if (*s1 < 0)
	s1 = AV_RN16(frame->data[1] + y frame->linesize[1] + 2 * x);
	if (*s2 < 0)
	s2 = AV_RN16(frame->data[2] + y frame->linesize[2] + 2 * x);
	if (*s3 < 0)
	s3 = AV_RN16(frame->data[3] + y frame->linesize[3] + 2 * x);
	}

	static int config_input(AVFilterLink *inlink)
	{
	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
	AVFilterContext *ctx = inlink->dst;
	FloodfillContext *s = ctx->priv;
	int depth;

	s->nb_planes = av_pix_fmt_count_planes(inlink->format);
	depth = desc->comp[0].depth;
	if (depth == 8) {
	switch (s->nb_planes) {
	case 1: s->set_pixel = set_pixel1;
	s->is_same = is_same1;
	s->pick_pixel = pick_pixel1; break;
	case 3: s->set_pixel = set_pixel3;
	s->is_same = is_same3;
	s->pick_pixel = pick_pixel3; break;
	case 4: s->set_pixel = set_pixel4;
	s->is_same = is_same4;
	s->pick_pixel = pick_pixel4; break;
	}
	} else {
	switch (s->nb_planes) {
	case 1: s->set_pixel = set_pixel1_16;
	s->is_same = is_same1_16;
	s->pick_pixel = pick_pixel1_16; break;
	case 3: s->set_pixel = set_pixel3_16;
	s->is_same = is_same3_16;
	s->pick_pixel = pick_pixel3_16; break;
	case 4: s->set_pixel = set_pixel4_16;
	s->is_same = is_same4_16;
	s->pick_pixel = pick_pixel4_16; break;
	}
	}

	s->front = s->back = 0;
	s->points = av_calloc(inlink->w * inlink->h, 4 * sizeof(Points));
	if (!s->points)
	return AVERROR(ENOMEM);

	return 0;
	}

	static int filter_frame(AVFilterLink link, AVFrame frame)
	{
	AVFilterContext *ctx = link->dst;
	FloodfillContext *s = ctx->priv;
	const unsigned d0 = s->d[0];
	const unsigned d1 = s->d[1];
	const unsigned d2 = s->d[2];
	const unsigned d3 = s->d[3];
	int s0 = s->s[0];
	int s1 = s->s[1];
	int s2 = s->s[2];
	int s3 = s->s[3];
	const int w = frame->width;
	const int h = frame->height;
	int i, ret;

	if (is_inside(s->x, s->y, w, h)) {
	s->pick_pixel(frame, s->x, s->y, &s0, &s1, &s2, &s3);

	s->S[0] = s0;
	s->S[1] = s1;
	s->S[2] = s2;
	s->S[3] = s3;
	for (i = 0; i < s->nb_planes; i++) {
	if (s->S[i] != s->d[i])
	break;
	}

	if (i == s->nb_planes)
	goto end;

	if (s->is_same(frame, s->x, s->y, s0, s1, s2, s3)) {
	s->points[s->front].x = s->x;
	s->points[s->front].y = s->y;
	s->front++;
	}

	if (ret = av_frame_make_writable(frame))
	return ret;

	while (s->front > s->back) {
	int x, y;

	s->front--;
	x = s->points[s->front].x;
	y = s->points[s->front].y;

	if (s->is_same(frame, x, y, s0, s1, s2, s3)) {
	s->set_pixel(frame, x, y, d0, d1, d2, d3);

	if (is_inside(x + 1, y, w, h)) {
	s->points[s->front] .x = x + 1;
	s->points[s->front++].y = y;
	}

	if (is_inside(x - 1, y, w, h)) {
	s->points[s->front] .x = x - 1;
	s->points[s->front++].y = y;
	}

	if (is_inside(x, y + 1, w, h)) {
	s->points[s->front] .x = x;
	s->points[s->front++].y = y + 1;
	}

	if (is_inside(x, y - 1, w, h)) {
	s->points[s->front] .x = x;
	s->points[s->front++].y = y - 1;
	}
	}
	}
	}

	end:
	return ff_filter_frame(ctx->outputs[0], frame);
	}

	static av_cold int query_formats(AVFilterContext *ctx)
	{
	static const enum AVPixelFormat pixel_fmts[] = {
	AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
	AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P,
	AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
	AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
	AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GBRAP,
	AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUVA444P10,
	AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUVA444P16,
	AV_PIX_FMT_NONE
	};
	AVFilterFormats *formats;

	formats = ff_make_format_list(pixel_fmts);
	if (!formats)
	return AVERROR(ENOMEM);

	return ff_set_common_formats(ctx, formats);
	}

	static av_cold void uninit(AVFilterContext *ctx)
	{
	FloodfillContext *s = ctx->priv;

	av_freep(&s->points);
	}

	static const AVFilterPad floodfill_inputs[] = {
	{
	.name = "default",
	.type = AVMEDIA_TYPE_VIDEO,
	.filter_frame = filter_frame,
	.config_props = config_input,
	},
	{ NULL }
	};

	static const AVFilterPad floodfill_outputs[] = {
	{
	.name = "default",
	.type = AVMEDIA_TYPE_VIDEO,
	},
	{ NULL }
	};

	#define OFFSET(x) offsetof(FloodfillContext, x)
	#define FLAGS AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_VIDEO_PARAM

	static const AVOption floodfill_options[] = {
	{ "x", "set pixel x coordinate", OFFSET(x), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
	{ "y", "set pixel y coordinate", OFFSET(y), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
	{ "s0", "set source #0 component value", OFFSET(s[0]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
	{ "s1", "set source #1 component value", OFFSET(s[1]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
	{ "s2", "set source #2 component value", OFFSET(s[2]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
	{ "s3", "set source #3 component value", OFFSET(s[3]), AV_OPT_TYPE_INT, {.i64=0},-1, UINT16_MAX, FLAGS },
	{ "d0", "set destination #0 component value", OFFSET(d[0]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
	{ "d1", "set destination #1 component value", OFFSET(d[1]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
	{ "d2", "set destination #2 component value", OFFSET(d[2]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
	{ "d3", "set destination #3 component value", OFFSET(d[3]), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
	{ NULL }
	};

	AVFILTER_DEFINE_CLASS(floodfill);

	AVFilter ff_vf_floodfill = {
	.name = "floodfill",
	.description = NULL_IF_CONFIG_SMALL("Fill area with same color with another color."),
	.priv_size = sizeof(FloodfillContext),
	.priv_class = &floodfill_class,
	.query_formats = query_formats,
	.uninit = uninit,
	.inputs = floodfill_inputs,
	.outputs = floodfill_outputs,
	.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
	};