350 lines
17 KiB
C
350 lines
17 KiB
C
/*
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* Copyright (C) 2019 Leo Zhang <leozhang@qiyi.com>
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* yaep(yet another edge preserving) blur filter
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*
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* This implementation is based on an algorithm described in
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* "J. S. Lee, Digital image enhancement and noise filtering by use of local statistics, IEEE Trans. Pattern
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* Anal. Mach. Intell. PAMI-2, 1980."
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*/
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#include "libavutil/opt.h"
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#include "libavutil/imgutils.h"
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#include "avfilter.h"
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#include "internal.h"
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typedef struct YAEPContext {
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const AVClass *class;
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int planes;
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int radius;
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int sigma;
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int nb_planes;
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int planewidth[4];
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int planeheight[4];
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int depth;
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uint64_t *sat; ///< summed area table
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uint64_t *square_sat; ///< square summed area table
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int sat_linesize;
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int (*pre_calculate_row)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
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int (*filter_slice )(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
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} YAEPContext;
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static av_cold void uninit(AVFilterContext *ctx)
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{
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YAEPContext *s = ctx->priv;
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av_freep(&s->sat);
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av_freep(&s->square_sat);
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}
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
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AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
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AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
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AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
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AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
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AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
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AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
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AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
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AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
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AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_NONE
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};
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return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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}
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typedef struct ThreadData {
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int width;
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int height;
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int src_linesize;
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int dst_linesize;
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uint8_t *src;
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uint8_t *dst;
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} ThreadData;
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#define PRE_CALCULATE_ROW(type, name) \
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static int pre_calculate_row_##name(AVFilterContext *ctx, void *arg, \
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int jobnr, int nb_jobs) \
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{ \
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ThreadData *td = arg; \
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YAEPContext *s = ctx->priv; \
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\
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const int width = td->width; \
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const int height = td->height; \
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const int linesize = td->src_linesize / sizeof(type); \
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const int sat_linesize = s->sat_linesize; \
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\
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const int starty = height * jobnr / nb_jobs; \
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const int endy = height * (jobnr+1) / nb_jobs; \
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\
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uint64_t *sat = s->sat + (starty + 1) * sat_linesize; \
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uint64_t *square_sat = s->square_sat + (starty + 1) * sat_linesize; \
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const type *src = (const type *)td->src + starty * linesize; \
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\
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int x, y; \
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\
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for (y = starty; y < endy; y++) { \
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for (x = 0; x < width; x++) { \
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sat[x+1] = sat[x] + src[x]; \
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square_sat[x+1] = square_sat[x] + (uint64_t)src[x] * src[x]; \
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} \
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sat += sat_linesize; \
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square_sat += sat_linesize; \
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src += linesize; \
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} \
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\
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return 0; \
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}
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PRE_CALCULATE_ROW(uint8_t, byte)
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PRE_CALCULATE_ROW(uint16_t, word)
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static int pre_calculate_col(AVFilterContext *ctx, void *arg,
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int jobnr, int nb_jobs)
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{
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ThreadData *td = arg;
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YAEPContext *s = ctx->priv;
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const int width = td->width;
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const int height = td->height;
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const int sat_linesize = s->sat_linesize;
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const int startx = width * jobnr / nb_jobs;
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const int endx = width * (jobnr + 1) / nb_jobs;
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uint64_t *sat, *square_sat;
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int x, y;
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for (x = startx; x < endx; x++) {
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sat = s->sat + x + 1;
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square_sat = s->square_sat + x + 1;
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for (y = 0; y < height; y++) {
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*(sat+sat_linesize) += *sat;
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*(square_sat+sat_linesize) += *square_sat;
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sat += sat_linesize;
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square_sat += sat_linesize;
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}
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}
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return 0;
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}
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#define FILTER_SLICE(type, name) \
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static int filter_slice_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
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{ \
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ThreadData *td = arg; \
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YAEPContext *s = ctx->priv; \
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\
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const int width = td->width; \
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const int height = td->height; \
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const int src_linesize = td->src_linesize / sizeof(type); \
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const int dst_linesize = td->dst_linesize / sizeof(type); \
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const int sat_linesize = s->sat_linesize; \
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const int sigma = s->sigma; \
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const int radius = s->radius; \
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\
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uint64_t *sat = s->sat; \
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uint64_t *square_sat = s->square_sat; \
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const type *src = (const type *)td->src; \
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type *dst = (type *)td->dst; \
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\
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const int starty = height * jobnr / nb_jobs; \
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const int endy = height * (jobnr + 1) / nb_jobs; \
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\
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int x, y; \
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int lower_x, higher_x; \
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int lower_y, higher_y; \
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int dist_y, count; \
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uint64_t sum, square_sum, mean, var; \
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\
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for (y = starty; y < endy; y++) { \
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lower_y = y - radius < 0 ? 0 : y - radius; \
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higher_y = y + radius + 1 > height ? height : y + radius + 1; \
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dist_y = higher_y - lower_y; \
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for (x = 0; x < width; x++) { \
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lower_x = x - radius < 0 ? 0 : x - radius; \
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higher_x = x + radius + 1 > width ? width : x + radius + 1; \
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count = dist_y * (higher_x - lower_x); \
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sum = sat[higher_y * sat_linesize + higher_x] \
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- sat[higher_y * sat_linesize + lower_x] \
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- sat[lower_y * sat_linesize + higher_x] \
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+ sat[lower_y * sat_linesize + lower_x]; \
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square_sum = square_sat[higher_y * sat_linesize + higher_x] \
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- square_sat[higher_y * sat_linesize + lower_x] \
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- square_sat[lower_y * sat_linesize + higher_x] \
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+ square_sat[lower_y * sat_linesize + lower_x]; \
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mean = sum / count; \
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var = (square_sum - sum * sum / count) / count; \
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dst[y * dst_linesize + x] = (sigma * mean + var * src[y * src_linesize + x]) / (sigma + var); \
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} \
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} \
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return 0; \
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}
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FILTER_SLICE(uint8_t, byte)
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FILTER_SLICE(uint16_t, word)
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterContext *ctx = inlink->dst;
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YAEPContext *s = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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AVFrame *out;
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int plane;
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const int nb_threads = ff_filter_get_nb_threads(ctx);
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ThreadData td;
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if (av_frame_is_writable(in)) {
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out = in;
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} else {
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out) {
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av_frame_free(&in);
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return AVERROR(ENOMEM);
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}
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av_frame_copy_props(out, in);
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}
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for (plane = 0; plane < s->nb_planes; plane++) {
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if (!s->radius || !(s->planes & (1<<plane))) {
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if (out != in) {
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av_image_copy_plane(out->data[plane], out->linesize[plane],
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in->data[plane], in->linesize[plane],
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s->planewidth[plane] * ((s->depth + 7) / 8),
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s->planeheight[plane]);
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}
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continue;
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}
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td.width = s->planewidth[plane];
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td.height = s->planeheight[plane];
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td.src = in->data[plane];
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td.src_linesize = in->linesize[plane];
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ctx->internal->execute(ctx, s->pre_calculate_row, &td, NULL, FFMIN(td.height, nb_threads));
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ctx->internal->execute(ctx, pre_calculate_col, &td, NULL, FFMIN(td.width, nb_threads));
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td.dst = out->data[plane];
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td.dst_linesize = out->linesize[plane];
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ctx->internal->execute(ctx, s->filter_slice, &td, NULL, FFMIN(td.height, nb_threads));
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}
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if (out != in)
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av_frame_free(&in);
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return ff_filter_frame(outlink, out);
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}
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static int config_input(AVFilterLink *inlink)
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{
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YAEPContext *s = inlink->dst->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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s->depth = desc->comp[0].depth;
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s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
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s->planewidth[0] = s->planewidth[3] = inlink->w;
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s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
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s->planeheight[0] = s->planeheight[3] = inlink->h;
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s->nb_planes = av_pix_fmt_count_planes(inlink->format);
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s->radius = FFMIN(s->radius, AV_CEIL_RSHIFT(FFMIN(inlink->w, inlink->h), 1));
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if (s->depth <= 8) {
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s->pre_calculate_row = pre_calculate_row_byte;
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s->filter_slice = filter_slice_byte;
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} else {
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s->pre_calculate_row = pre_calculate_row_word;
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s->filter_slice = filter_slice_word;
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}
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// padding one row on the top, and padding one col on the left, that is why + 1 below
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s->sat_linesize = inlink->w + 1;
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s->sat = av_mallocz_array(inlink->h + 1, s->sat_linesize*sizeof(*s->sat));
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if (!s->sat)
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return AVERROR(ENOMEM);
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s->square_sat = av_mallocz_array(inlink->h + 1, s->sat_linesize*sizeof(*s->square_sat));
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if (!s->square_sat)
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return AVERROR(ENOMEM);
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return 0;
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}
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static const AVFilterPad yaep_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_input,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad yaep_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL }
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};
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#define OFFSET(x) offsetof(YAEPContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption yaep_options[] = {
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{ "radius", "set window radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=3}, 0, INT_MAX, .flags=FLAGS },
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{ "r" , "set window radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=3}, 0, INT_MAX, .flags=FLAGS },
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{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1}, 0, 0xF, .flags=FLAGS },
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{ "p", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1}, 0, 0xF, .flags=FLAGS },
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{ "sigma", "set blur strength", OFFSET(sigma), AV_OPT_TYPE_INT, {.i64=128}, 1, INT_MAX, .flags=FLAGS },
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{ "s", "set blur strength", OFFSET(sigma), AV_OPT_TYPE_INT, {.i64=128}, 1, INT_MAX, .flags=FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(yaep);
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AVFilter ff_vf_yaepblur = {
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.name = "yaepblur",
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.description = NULL_IF_CONFIG_SMALL("Yet another edge preserving blur filter."),
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.priv_size = sizeof(YAEPContext),
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.priv_class = &yaep_class,
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.uninit = uninit,
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.query_formats = query_formats,
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.inputs = yaep_inputs,
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.outputs = yaep_outputs,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
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.process_command = ff_filter_process_command,
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};
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