diff options
author | Paul B Mahol <onemda@gmail.com> | 2019-01-15 11:32:49 +0100 |
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committer | Paul B Mahol <onemda@gmail.com> | 2019-10-29 10:56:04 +0100 |
commit | 1c3b70e2e078bf0901b3af5491f923818809de37 (patch) | |
tree | b97e20f26684a6859c03a1ea52f8ad74ef14729c /libavfilter/vf_median.c | |
parent | 68f623d64451a6ee8c81b6071ec68d6097c0f213 (diff) |
avfilter: add median filter
Diffstat (limited to 'libavfilter/vf_median.c')
-rw-r--r-- | libavfilter/vf_median.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/libavfilter/vf_median.c b/libavfilter/vf_median.c new file mode 100644 index 0000000000..98296bcc2b --- /dev/null +++ b/libavfilter/vf_median.c @@ -0,0 +1,271 @@ +/* + * 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 }, + { 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_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 %d must be not less than %d\n", i, s->planewidth[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 %d must be not less than %d\n", i, s->planeheight[i], s->radius * 2 + 1); + return AVERROR(EINVAL); + } + } + + s->nb_threads = FFMAX(1, FFMIN(s->planeheight[1] / (s->radius + 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, +}; |