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FFmpeg/libavfilter/vf_lagfun.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) 2019 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/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
typedef struct LagfunContext {
const AVClass *class;
float decay;
int planes;
int depth;
int nb_planes;
int linesize[4];
int planewidth[4];
int planeheight[4];
float *old[4];
int (*lagfun[2])(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} LagfunContext;
static const enum AVPixelFormat pixel_fmts[] = {
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_YUV410P, AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUVJ411P,
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_YUV440P10,
AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
AV_PIX_FMT_YUV440P12,
AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
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_GRAYF32, AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32,
AV_PIX_FMT_NONE
};
typedef struct ThreadData {
AVFrame *in, *out;
} ThreadData;
#define LAGFUN(name, type, round, disabled) \
static int lagfun_frame##name(AVFilterContext *ctx, void *arg, \
int jobnr, int nb_jobs) \
{ \
LagfunContext *s = ctx->priv; \
const float decay = s->decay; \
ThreadData *td = arg; \
AVFrame *in = td->in; \
AVFrame *out = td->out; \
\
for (int p = 0; p < s->nb_planes; p++) { \
const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs; \
const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs; \
const int width = s->planewidth[p]; \
const type *src = (const type *)in->data[p] + \
slice_start * in->linesize[p] / sizeof(type); \
float *osrc = s->old[p] + slice_start * s->planewidth[p]; \
type *dst = (type *)out->data[p] + \
slice_start * out->linesize[p] / sizeof(type); \
\
if (!((1 << p) & s->planes)) { \
av_image_copy_plane((uint8_t *)dst, out->linesize[p], \
(const uint8_t *)src, in->linesize[p], \
s->linesize[p], slice_end - slice_start); \
continue; \
} \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < width; x++) { \
const float v = fmaxf(src[x], osrc[x] * decay); \
\
osrc[x] = v; \
if (disabled) { \
dst[x] = src[x]; \
} else { \
dst[x] = round(v); \
} \
} \
\
src += in->linesize[p] / sizeof(type); \
osrc += width; \
dst += out->linesize[p] / sizeof(type); \
} \
} \
\
return 0; \
}
LAGFUN(8, uint8_t, lrintf, 0)
LAGFUN(16, uint16_t, lrintf, 0)
LAGFUN(32, float, , 0)
LAGFUN(d8, uint8_t, lrintf, 1)
LAGFUN(d16, uint16_t, lrintf, 1)
LAGFUN(d32, float, , 1)
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
LagfunContext *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
const AVPixFmtDescriptor *desc;
int ret;
desc = av_pix_fmt_desc_get(outlink->format);
if (!desc)
return AVERROR_BUG;
s->nb_planes = av_pix_fmt_count_planes(outlink->format);
s->depth = desc->comp[0].depth;
s->lagfun[0] = s->depth <= 8 ? lagfun_frame8 : s->depth <= 16 ? lagfun_frame16 : lagfun_frame32;
s->lagfun[1] = s->depth <= 8 ? lagfun_framed8 : s->depth <= 16 ? lagfun_framed16 : lagfun_framed32;
if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
return ret;
s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
s->planewidth[0] = s->planewidth[3] = inlink->w;
s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = inlink->h;
for (int p = 0; p < s->nb_planes; p++) {
s->old[p] = av_calloc(s->planewidth[p] * s->planeheight[p], sizeof(*s->old[0]));
if (!s->old[p])
return AVERROR(ENOMEM);
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
LagfunContext *s = ctx->priv;
ThreadData td;
AVFrame *out;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, in);
td.out = out;
td.in = in;
ff_filter_execute(ctx, s->lagfun[!!ctx->is_disabled], &td, NULL,
FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
static av_cold void uninit(AVFilterContext *ctx)
{
LagfunContext *s = ctx->priv;
for (int p = 0; p < s->nb_planes; p++)
av_freep(&s->old[p]);
}
#define OFFSET(x) offsetof(LagfunContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption lagfun_options[] = {
{ "decay", "set decay", OFFSET(decay), AV_OPT_TYPE_FLOAT, {.dbl=.95}, 0, 1, FLAGS },
{ "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, FLAGS },
{ NULL },
};
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
AVFILTER_DEFINE_CLASS(lagfun);
const AVFilter ff_vf_lagfun = {
.name = "lagfun",
.description = NULL_IF_CONFIG_SMALL("Slowly update darker pixels."),
.priv_size = sizeof(LagfunContext),
.priv_class = &lagfun_class,
.uninit = uninit,
FILTER_OUTPUTS(outputs),
FILTER_INPUTS(inputs),
FILTER_PIXFMTS_ARRAY(pixel_fmts),
.flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
.process_command = ff_filter_process_command,
};
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