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FFmpeg/libavfilter/vf_median.c

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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
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*/
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "median.h"
#include "video.h"
#define DEPTH 8
#include "median_template.c"
#undef DEPTH
#define DEPTH 9
#include "median_template.c"
#undef DEPTH
#define DEPTH 10
#include "median_template.c"
#undef DEPTH
#define DEPTH 12
#include "median_template.c"
#undef DEPTH
#define DEPTH 14
#include "median_template.c"
#undef DEPTH
#define DEPTH 16
#include "median_template.c"
#define OFFSET(x) offsetof(MedianContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption median_options[] = {
{ "radius", "set median radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=1}, 1, 127, FLAGS },
{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
{ "radiusV", "set median vertical radius", OFFSET(radiusV), AV_OPT_TYPE_INT, {.i64=0},0, 127, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(median);
static void hadd(htype *dst, const htype *src, int bins)
{
for (int i = 0; i < bins; i++)
dst[i] += src[i];
}
static void hsub(htype *dst, const htype *src, int bins)
{
for (int i = 0; i < bins; i++)
dst[i] -= src[i];
}
static void hmuladd(htype *dst, const htype *src, int f, int bins)
{
for (int i = 0; i < bins; i++)
dst[i] += f * src[i];
}
static int query_formats(AVFilterContext *ctx)
{
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_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9,
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, AV_PIX_FMT_GBRP9,
AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
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_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
AV_PIX_FMT_NONE
};
return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
}
static int config_input(AVFilterLink *inlink)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
MedianContext *s = inlink->dst->priv;
s->depth = desc->comp[0].depth;
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;
s->radiusV = !s->radiusV ? s->radius : s->radiusV;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
s->t = 2 * s->radius * s->radiusV + 2 * s->radius;
for (int i = 0; i < s->nb_planes; i++) {
if (!(s->planes & (1 << i)))
continue;
if (s->planewidth[i] < s->radius * 2 + 1) {
av_log(inlink->dst, AV_LOG_ERROR, "The %d plane width %d must be not less than %d\n", i, s->planewidth[i], s->radius * 2 + 1);
return AVERROR(EINVAL);
}
if (s->planeheight[i] < s->radiusV * 2 + 1) {
av_log(inlink->dst, AV_LOG_ERROR, "The %d plane height %d must be not less than %d\n", i, s->planeheight[i], s->radiusV * 2 + 1);
return AVERROR(EINVAL);
}
}
s->nb_threads = FFMAX(1, FFMIN(s->planeheight[1] / (s->radiusV + 1), ff_filter_get_nb_threads(inlink->dst)));
s->bins = 1 << ((s->depth + 1) / 2);
s->fine_size = s->bins * s->bins * inlink->w;
s->coarse_size = s->bins * inlink->w;
s->coarse = av_calloc(s->nb_threads, sizeof(*s->coarse));
s->fine = av_calloc(s->nb_threads, sizeof(*s->fine));
if (!s->coarse || !s->fine)
return AVERROR(ENOMEM);
for (int i = 0; i < s->nb_threads; i++) {
s->coarse[i] = av_malloc_array(s->coarse_size, sizeof(**s->coarse));
s->fine[i] = av_malloc_array(s->fine_size, sizeof(**s->fine));
if (!s->coarse[i] || !s->fine[i])
return AVERROR(ENOMEM);
}
s->hadd = hadd;
s->hsub = hsub;
s->hmuladd = hmuladd;
switch (s->depth) {
case 8: s->filter_plane = filter_plane_8; break;
case 9: s->filter_plane = filter_plane_9; break;
case 10: s->filter_plane = filter_plane_10; break;
case 12: s->filter_plane = filter_plane_12; break;
case 14: s->filter_plane = filter_plane_14; break;
case 16: s->filter_plane = filter_plane_16; break;
}
return 0;
}
typedef struct ThreadData {
AVFrame *in, *out;
} ThreadData;
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
MedianContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
for (int plane = 0; plane < s->nb_planes; plane++) {
const int h = s->planeheight[plane];
const int w = s->planewidth[plane];
const int slice_h_start = (h * jobnr) / nb_jobs;
const int slice_h_end = (h * (jobnr+1)) / nb_jobs;
if (!(s->planes & (1 << plane))) {
av_image_copy_plane(out->data[plane] + slice_h_start * out->linesize[plane],
out->linesize[plane],
in->data[plane] + slice_h_start * in->linesize[plane],
in->linesize[plane],
w * ((s->depth + 7) / 8),
slice_h_end - slice_h_start);
continue;
}
s->filter_plane(ctx, in->data[plane],
in->linesize[plane],
out->data[plane] + slice_h_start * out->linesize[plane],
out->linesize[plane], w, h,
slice_h_start, slice_h_end, jobnr);
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
MedianContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
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.in = in; td.out = out;
ctx->internal->execute(ctx, filter_slice, &td, NULL, s->nb_threads);
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
static av_cold void uninit(AVFilterContext *ctx)
{
MedianContext *s = ctx->priv;
for (int i = 0; i < s->nb_threads && s->coarse && s->fine; i++) {
av_freep(&s->coarse[i]);
av_freep(&s->fine[i]);
}
av_freep(&s->coarse);
av_freep(&s->fine);
}
static const AVFilterPad median_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad median_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter ff_vf_median = {
.name = "median",
.description = NULL_IF_CONFIG_SMALL("Apply Median filter."),
.priv_size = sizeof(MedianContext),
.priv_class = &median_class,
.uninit = uninit,
.query_formats = query_formats,
.inputs = median_inputs,
.outputs = median_outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
};
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