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FFmpeg/libavfilter/vf_hysteresis.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) 2013 Oka Motofumi (chikuzen.mo at gmail dot com)
* Copyright (c) 2016 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/imgutils.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
#include "framesync.h"
#define OFFSET(x) offsetof(HysteresisContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
typedef struct HysteresisContext {
const AVClass *class;
FFFrameSync fs;
int planes;
int threshold;
int width[4], height[4];
int nb_planes;
int depth;
uint8_t *map;
uint32_t *xy;
int index;
void (*hysteresis)(struct HysteresisContext *s, const uint8_t *bsrc, const uint8_t *osrc, uint8_t *dst,
ptrdiff_t blinesize, ptrdiff_t olinesize,
ptrdiff_t destlinesize,
int w, int h);
} HysteresisContext;
static const AVOption hysteresis_options[] = {
{ "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
{ "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
{ NULL }
};
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
AV_PIX_FMT_NONE
};
static int process_frame(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
HysteresisContext *s = fs->opaque;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out, *base, *alt;
int ret;
if ((ret = ff_framesync_get_frame(&s->fs, 0, &base, 0)) < 0 ||
(ret = ff_framesync_get_frame(&s->fs, 1, &alt, 0)) < 0)
return ret;
if (ctx->is_disabled) {
out = av_frame_clone(base);
if (!out)
return AVERROR(ENOMEM);
} else {
int p;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
return AVERROR(ENOMEM);
av_frame_copy_props(out, base);
for (p = 0; p < s->nb_planes; p++) {
if (!((1 << p) & s->planes)) {
av_image_copy_plane(out->data[p], out->linesize[p], base->data[p], base->linesize[p],
s->width[p], s->height[p]);
continue;
} else {
int y;
for (y = 0; y < s->height[p]; y++) {
memset(out->data[p] + y * out->linesize[p], 0, s->width[p]);
}
}
s->index = -1;
memset(s->map, 0, s->width[0] * s->height[0]);
memset(s->xy, 0, s->width[0] * s->height[0] * 4);
s->hysteresis(s, base->data[p], alt->data[p],
out->data[p],
base->linesize[p], alt->linesize[p],
out->linesize[p],
s->width[p], s->height[p]);
}
}
out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
return ff_filter_frame(outlink, out);
}
static int passed(HysteresisContext *s, int x, int y, int w)
{
return s->map[x + y * w];
}
static void push(HysteresisContext *s, int x, int y, int w)
{
s->map[x + y * w] = 0xff;
s->xy[++s->index] = (uint16_t)(x) << 16 | (uint16_t)y;
}
static void pop(HysteresisContext *s, int *x, int *y)
{
uint32_t val = s->xy[s->index--];
*x = val >> 16;
*y = val & 0x0000FFFF;
}
static int is_empty(HysteresisContext *s)
{
return s->index < 0;
}
static void hysteresis8(HysteresisContext *s, const uint8_t *bsrc, const uint8_t *asrc,
uint8_t *dst,
ptrdiff_t blinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h)
{
const int t = s->threshold;
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if ((bsrc[x + y * blinesize] > t) && (asrc[x + y * alinesize] > t) && !passed(s, x, y, w)) {
int posx, posy;
dst[x + y * dlinesize] = asrc[x + y * alinesize];
push(s, x, y, w);
while (!is_empty(s)) {
int x_min, x_max, y_min, y_max, yy, xx;
pop(s, &posx, &posy);
x_min = posx > 0 ? posx - 1 : 0;
x_max = posx < w - 1 ? posx + 1 : posx;
y_min = posy > 0 ? posy - 1 : 0;
y_max = posy < h - 1 ? posy + 1 : posy;
for (yy = y_min; yy <= y_max; yy++) {
for (xx = x_min; xx <= x_max; xx++) {
if ((asrc[xx + yy * alinesize] > t) && !passed(s, xx, yy, w)) {
dst[xx + yy * dlinesize] = asrc[xx + yy * alinesize];
push(s, xx, yy, w);
}
}
}
}
}
}
}
}
static void hysteresis16(HysteresisContext *s, const uint8_t *bbsrc, const uint8_t *aasrc,
uint8_t *ddst,
ptrdiff_t blinesize, ptrdiff_t alinesize,
ptrdiff_t dlinesize,
int w, int h)
{
const uint16_t *bsrc = (const uint16_t *)bbsrc;
const uint16_t *asrc = (const uint16_t *)aasrc;
uint16_t *dst = (uint16_t *)ddst;
const int t = s->threshold;
int x, y;
blinesize /= 2;
alinesize /= 2;
dlinesize /= 2;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if ((bsrc[x + y * blinesize] > t) && (asrc[x + y * alinesize] > t) && !passed(s, x, y, w)) {
int posx, posy;
dst[x + y * dlinesize] = asrc[x + y * alinesize];
push(s, x, y, w);
while (!is_empty(s)) {
int x_min, x_max, y_min, y_max, yy, xx;
pop(s, &posx, &posy);
x_min = posx > 0 ? posx - 1 : 0;
x_max = posx < w - 1 ? posx + 1 : posx;
y_min = posy > 0 ? posy - 1 : 0;
y_max = posy < h - 1 ? posy + 1 : posy;
for (yy = y_min; yy <= y_max; yy++) {
for (xx = x_min; xx <= x_max; xx++) {
if ((asrc[xx + yy * alinesize] > t) && !passed(s, xx, yy, w)) {
dst[xx + yy * dlinesize] = asrc[xx + yy * alinesize];
push(s, xx, yy, w);
}
}
}
}
}
}
}
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
HysteresisContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int vsub, hsub;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
hsub = desc->log2_chroma_w;
vsub = desc->log2_chroma_h;
s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
s->height[0] = s->height[3] = inlink->h;
s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
s->width[0] = s->width[3] = inlink->w;
s->depth = desc->comp[0].depth;
if (desc->comp[0].depth == 8)
s->hysteresis = hysteresis8;
else
s->hysteresis = hysteresis16;
s->map = av_calloc(inlink->w, inlink->h * sizeof (*s->map));
if (!s->map)
return AVERROR(ENOMEM);
s->xy = av_calloc(inlink->w, inlink->h * sizeof(*s->xy));
if (!s->xy)
return AVERROR(ENOMEM);
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
HysteresisContext *s = ctx->priv;
AVFilterLink *base = ctx->inputs[0];
AVFilterLink *alt = ctx->inputs[1];
FFFrameSyncIn *in;
int ret;
if (base->w != alt->w || base->h != alt->h) {
av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
"(size %dx%d) do not match the corresponding "
"second input link %s parameters (size %dx%d)\n",
ctx->input_pads[0].name, base->w, base->h,
ctx->input_pads[1].name,
alt->w, alt->h);
return AVERROR(EINVAL);
}
outlink->w = base->w;
outlink->h = base->h;
outlink->sample_aspect_ratio = base->sample_aspect_ratio;
outlink->frame_rate = base->frame_rate;
if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
return ret;
in = s->fs.in;
in[0].time_base = base->time_base;
in[1].time_base = alt->time_base;
in[0].sync = 1;
in[0].before = EXT_STOP;
in[0].after = EXT_INFINITY;
in[1].sync = 1;
in[1].before = EXT_STOP;
in[1].after = EXT_INFINITY;
s->fs.opaque = s;
s->fs.on_event = process_frame;
ret = ff_framesync_configure(&s->fs);
outlink->time_base = s->fs.time_base;
return ret;
}
static int activate(AVFilterContext *ctx)
{
HysteresisContext *s = ctx->priv;
return ff_framesync_activate(&s->fs);
}
static av_cold void uninit(AVFilterContext *ctx)
{
HysteresisContext *s = ctx->priv;
ff_framesync_uninit(&s->fs);
av_freep(&s->map);
av_freep(&s->xy);
}
FRAMESYNC_DEFINE_CLASS(hysteresis, HysteresisContext, fs);
static const AVFilterPad hysteresis_inputs[] = {
{
.name = "base",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
},
{
.name = "alt",
.type = AVMEDIA_TYPE_VIDEO,
},
};
static const AVFilterPad hysteresis_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const AVFilter ff_vf_hysteresis = {
.name = "hysteresis",
.description = NULL_IF_CONFIG_SMALL("Grow first stream into second stream by connecting components."),
.preinit = hysteresis_framesync_preinit,
.priv_size = sizeof(HysteresisContext),
.uninit = uninit,
.activate = activate,
FILTER_INPUTS(hysteresis_inputs),
FILTER_OUTPUTS(hysteresis_outputs),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.priv_class = &hysteresis_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
};
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