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FFmpeg/libavfilter/vf_floodfill.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* 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/mem.h"
#include "libavutil/opt.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "filters.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)(const 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)(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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 = ff_inlink_make_frame_writable(link, &frame)) {
av_frame_free(&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 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
};
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,
},
};
#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);
const 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,
.uninit = uninit,
FILTER_INPUTS(floodfill_inputs),
FILTER_OUTPUTS(ff_video_default_filterpad),
FILTER_PIXFMTS_ARRAY(pixel_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};
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