@@ -11987,6 +11987,21 @@ Higher values should result in a smoother motion vector field but less
optimal individual vectors. Default value is 1.
@end table
+@section median
+
+Pick median pixel from certain rectangle defined by radius.
+
+This filter accepts the following options:
+
+@table @option
+@item radius
+Set horizontal and vertical radius size. Default value is @code{1}.
+Allowed range is integer from 1 to 127.
+
+@item planes
+Set which planes to process. Default is @code{15}, which is all available planes.
+@end table
+
@section mergeplanes
Merge color channel components from several video streams.
@@ -282,6 +282,7 @@ OBJS-$(CONFIG_MASKEDCLAMP_FILTER) += vf_maskedclamp.o framesync.o
OBJS-$(CONFIG_MASKEDMERGE_FILTER) += vf_maskedmerge.o framesync.o
OBJS-$(CONFIG_MASKFUN_FILTER) += vf_maskfun.o
OBJS-$(CONFIG_MCDEINT_FILTER) += vf_mcdeint.o
+OBJS-$(CONFIG_MEDIAN_FILTER) += vf_median.o
OBJS-$(CONFIG_MERGEPLANES_FILTER) += vf_mergeplanes.o framesync.o
OBJS-$(CONFIG_MESTIMATE_FILTER) += vf_mestimate.o motion_estimation.o
OBJS-$(CONFIG_METADATA_FILTER) += f_metadata.o
@@ -268,6 +268,7 @@ extern AVFilter ff_vf_maskedclamp;
extern AVFilter ff_vf_maskedmerge;
extern AVFilter ff_vf_maskfun;
extern AVFilter ff_vf_mcdeint;
+extern AVFilter ff_vf_median;
extern AVFilter ff_vf_mergeplanes;
extern AVFilter ff_vf_mestimate;
extern AVFilter ff_vf_metadata;
new file mode 100644
@@ -0,0 +1,47 @@
+/*
+ * 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:
+ */
+
+#ifndef AVFILTER_MEDIAN_H
+#define AVFILTER_MEDIAN_H
+
+#include "avfilter.h"
+
+typedef struct MedianContext {
+ const AVClass *class;
+
+ int planes;
+ int radius;
+
+ int planewidth[4];
+ int planeheight[4];
+ int depth;
+ int nb_planes;
+
+ uint16_t *coarse, *fine;
+ int bins;
+ int t;
+
+ void (*filter_plane)(AVFilterContext *ctx, uint8_t *ssrc, int src_linesize,
+ uint8_t *ddst, int dst_linesize, int width, int height);
+} MedianContext;
+
+#endif
new file mode 100644
@@ -0,0 +1,152 @@
+/*
+ * 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 "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+#undef pixel
+#if DEPTH == 8
+#define pixel uint8_t
+#else
+#define pixel uint16_t
+#endif
+
+#undef fn
+#undef fn2
+#undef fn3
+#define SHIFT (DEPTH / 2)
+#define BINS (1 << SHIFT)
+#define MASK (BINS - 1)
+#define fn3(a,b) a##_##b
+#define fn2(a,b) fn3(a,b)
+#define fn(a) fn2(a, DEPTH)
+
+#define PICK_COARSE_BIN(x, y) (BINS * (x) + ((y) >> SHIFT))
+#define PICK_FINE_BIN(x, y, z) (BINS * ((x) * ((y) >> SHIFT) + (z)) + ((y) & MASK))
+
+static void fn(filter_plane)(AVFilterContext *ctx, uint8_t *ssrc, int src_linesize,
+ uint8_t *ddst, int dst_linesize, int width, int height)
+{
+ MedianContext *s = ctx->priv;
+ uint16_t coarse[BINS];
+ uint16_t fine[BINS][BINS];
+ uint16_t luc[BINS];
+ const int radius = s->radius;
+ const int t = s->t;
+ const pixel *src = (const pixel *)ssrc;
+ pixel *dst = (pixel *)ddst;
+ const pixel *srcp = src;
+ const pixel *p, *q;
+
+ src_linesize /= sizeof(pixel);
+ dst_linesize /= sizeof(pixel);
+
+ memset(s->coarse, 0, BINS * width * sizeof(*s->coarse));
+ memset(s->fine, 0, BINS * BINS * width * sizeof(*s->fine));
+
+ for (int i = 0; i < width; i++) {
+ s->coarse[PICK_COARSE_BIN(i, src[i])] += radius + 1;
+ s->fine[PICK_FINE_BIN(width, src[i], i)] += radius + 1;
+ }
+
+ for (int i = 0; i < radius; i++) {
+ for (int j = 0; j < width; j++) {
+ s->coarse[PICK_COARSE_BIN(j, srcp[j])]++;
+ s->fine[PICK_FINE_BIN(width, srcp[j], j)]++;
+ }
+ srcp += src_linesize;
+ }
+
+ srcp = src;
+
+ for (int i = 0; i < height; i++) {
+ p = srcp + src_linesize * FFMAX(0, i - radius - 1);
+ q = p + width;
+ for (int j = 0; p != q; j++, p++) {
+ s->coarse[PICK_COARSE_BIN(j, *p)]--;
+ s->fine[PICK_FINE_BIN(width, *p, j)]--;
+ }
+
+ p = srcp + src_linesize * FFMIN(height - 1, i + radius);
+ q = p + width;
+ for (int j = 0; p != q; j++, p++) {
+ s->coarse[PICK_COARSE_BIN(j, *p)]++;
+ s->fine[PICK_FINE_BIN(width, *p, j)]++;
+ }
+
+ memset(coarse, 0, sizeof(coarse));
+ memset(fine, 0, sizeof(fine));
+ memset(luc, 0, sizeof(luc));
+ hmuladd(coarse, &s->coarse[0], radius, BINS);
+ for (int j = 0; j < radius; j++)
+ hadd(coarse, &s->coarse[BINS * j], BINS);
+ for (int k = 0; k < BINS; k++)
+ hmuladd(&fine[k][0], &s->fine[BINS * width * k], 2 * radius + 1, BINS);
+
+ for (int j = 0; j < width; j++) {
+ uint16_t sum = 0;
+ uint16_t *segment;
+ int k, b;
+
+ hadd(coarse, &s->coarse[BINS * FFMIN(j + radius, width - 1)], BINS);
+
+ for (k = 0; k < BINS; k++) {
+ sum += coarse[k];
+ if (sum > t) {
+ sum -= coarse[k];
+ break;
+ }
+ }
+ av_assert0(k < BINS);
+
+ if (luc[k] <= j - radius) {
+ memset(&fine[k], 0, BINS * sizeof(uint16_t));
+ for (luc[k] = j - radius; luc[k] < FFMIN(j + radius + 1, width); luc[k]++)
+ hadd(fine[k], &s->fine[BINS * (width * k + luc[k])], BINS);
+ if (luc[k] < j + radius + 1) {
+ hmuladd(&fine[k][0], &s->fine[BINS * (width * k + width - 1)], j + radius + 1 - width, BINS);
+ luc[k] = j + radius + 1;
+ }
+ } else {
+ for (; luc[k] < j + radius + 1; luc[k]++) {
+ hsub(fine[k], &s->fine[BINS * (width * k + FFMAX(luc[k] - 2 * radius - 1, 0))], BINS);
+ hadd(fine[k], &s->fine[BINS * (width * k + FFMIN(luc[k], width - 1))], BINS);
+ }
+ }
+
+ hsub(coarse, &s->coarse[BINS * FFMAX(j - radius, 0)], BINS);
+
+ segment = fine[k];
+ for (b = 0; b < BINS; b++) {
+ sum += segment[b];
+ if (sum > t) {
+ dst[dst_linesize * i + j] = BINS * k + b;
+ break;
+ }
+ }
+ av_assert0(b < BINS);
+ }
+ }
+}
new file mode 100644
@@ -0,0 +1,220 @@
+/*
+ * 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"
+
+static void hadd(uint16_t *dst, const uint16_t *src, int bins)
+{
+ for (int i = 0; i < bins; i++)
+ dst[i] += src[i];
+}
+
+static void hsub(uint16_t *dst, const uint16_t *src, int bins)
+{
+ for (int i = 0; i < bins; i++)
+ dst[i] -= src[i];
+}
+
+static void hmuladd(uint16_t *dst, const uint16_t *src, uint16_t f, int bins)
+{
+ for (int i = 0; i < bins; i++)
+ dst[i] += f * src[i];
+}
+
+#define DEPTH 8
+#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 },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(median);
+
+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_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_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->nb_planes = av_pix_fmt_count_planes(inlink->format);
+ s->t = 2 * s->radius * s->radius + 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 must be not less than %d\n", i, s->radius * 2 + 1);
+ return AVERROR(EINVAL);
+ }
+
+ if (s->planeheight[i] < s->radius * 2 + 1) {
+ av_log(inlink->dst, AV_LOG_ERROR, "The %d plane height must be not less than %d\n", i, s->radius * 2 + 1);
+ return AVERROR(EINVAL);
+ }
+ }
+
+ s->bins = 1 << (s->depth / 2);
+ s->coarse = av_malloc_array(s->bins * inlink->w, sizeof(*s->coarse));
+ s->fine = av_malloc_array(s->bins * s->bins * inlink->w, sizeof(*s->fine));
+ if (!s->coarse || !s->fine)
+ return AVERROR(ENOMEM);
+
+ switch (s->depth) {
+ case 8: s->filter_plane = filter_plane_8; 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;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ MedianContext *s = ctx->priv;
+ AVFilterLink *outlink = ctx->outputs[0];
+ AVFrame *out;
+ int plane;
+
+ 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);
+
+ for (plane = 0; plane < s->nb_planes; plane++) {
+ if (!(s->planes & (1 << plane))) {
+ av_image_copy_plane(out->data[plane], out->linesize[plane],
+ in->data[plane], in->linesize[plane],
+ s->planewidth[plane] * ((s->depth + 7) / 8),
+ s->planeheight[plane]);
+ continue;
+ }
+
+ s->filter_plane(ctx, in->data[plane], in->linesize[plane],
+ out->data[plane], out->linesize[plane],
+ s->planewidth[plane], s->planeheight[plane]);
+ }
+
+ av_frame_free(&in);
+ return ff_filter_frame(outlink, out);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ MedianContext *s = ctx->priv;
+
+ 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,
+};
Signed-off-by: Paul B Mahol <onemda@gmail.com> --- doc/filters.texi | 15 +++ libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/median.h | 47 ++++++++ libavfilter/median_template.c | 152 +++++++++++++++++++++++ libavfilter/vf_median.c | 220 ++++++++++++++++++++++++++++++++++ 6 files changed, 436 insertions(+) create mode 100644 libavfilter/median.h create mode 100644 libavfilter/median_template.c create mode 100644 libavfilter/vf_median.c