From 8ef163ba9e3d2d7cb31856c33f86439e234fe623 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Fri, 3 May 2019 14:08:49 +0200 Subject: avfilter: add xmedian filter --- libavfilter/vf_xmedian.c | 347 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 347 insertions(+) create mode 100644 libavfilter/vf_xmedian.c (limited to 'libavfilter/vf_xmedian.c') diff --git a/libavfilter/vf_xmedian.c b/libavfilter/vf_xmedian.c new file mode 100644 index 0000000000..0e1b365c82 --- /dev/null +++ b/libavfilter/vf_xmedian.c @@ -0,0 +1,347 @@ +/* + * 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/avstring.h" +#include "libavutil/imgutils.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "libavutil/qsort.h" + +#include "avfilter.h" +#include "formats.h" +#include "internal.h" +#include "framesync.h" +#include "video.h" + +typedef struct XMedianContext { + const AVClass *class; + const AVPixFmtDescriptor *desc; + int nb_inputs; + int planes; + + int radius; + int depth; + int max; + int nb_planes; + int linesize[4]; + int width[4]; + int height[4]; + + AVFrame **frames; + FFFrameSync fs; + + int (*median_frames)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs); +} XMedianContext; + +static int query_formats(AVFilterContext *ctx) +{ + 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_NONE + }; + AVFilterFormats *formats = ff_make_format_list(pixel_fmts); + if (!formats) + return AVERROR(ENOMEM); + return ff_set_common_formats(ctx, formats); +} + +static av_cold int init(AVFilterContext *ctx) +{ + XMedianContext *s = ctx->priv; + int ret; + + if (!(s->nb_inputs & 1)) + av_log(s, AV_LOG_WARNING, "nb_intputs: %d is not odd number.\n", s->nb_inputs); + + s->nb_inputs = s->nb_inputs | 1; + s->radius = s->nb_inputs / 2; + s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames)); + if (!s->frames) + return AVERROR(ENOMEM); + + for (int i = 0; i < s->nb_inputs; i++) { + AVFilterPad pad = { 0 }; + + pad.type = AVMEDIA_TYPE_VIDEO; + pad.name = av_asprintf("input%d", i); + if (!pad.name) + return AVERROR(ENOMEM); + + if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) { + av_freep(&pad.name); + return ret; + } + } + + return 0; +} + +typedef struct ThreadData { + AVFrame **in, *out; +} ThreadData; + +static int comparei(const void *p1, const void *p2) +{ + int left = *(const int *)p1; + int right = *(const int *)p2; + return FFDIFFSIGN(left, right); +} + +static int median_frames16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) +{ + XMedianContext *s = ctx->priv; + ThreadData *td = arg; + AVFrame **in = td->in; + AVFrame *out = td->out; + const int nb_inputs = s->nb_inputs; + const int radius = s->radius; + int values[256]; + + for (int p = 0; p < s->nb_planes; p++) { + const int slice_start = (s->height[p] * jobnr) / nb_jobs; + const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs; + uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]); + + if (!((1 << p) & s->planes)) { + av_image_copy_plane((uint8_t *)dst, out->linesize[p], + in[0]->data[p] + slice_start * in[radius]->linesize[p], + in[0]->linesize[p], + s->linesize[p], slice_end - slice_start); + continue; + } + + for (int y = slice_start; y < slice_end; y++) { + for (int x = 0; x < s->width[p]; x++) { + for (int i = 0; i < nb_inputs; i++) { + const uint16_t *src = (const uint16_t *)(in[i]->data[p] + y * in[i]->linesize[p]); + values[i] = src[x]; + } + + AV_QSORT(values, nb_inputs, int, comparei); + dst[x] = values[radius]; + } + + dst += out->linesize[p] / 2; + } + } + + return 0; +} + +static int median_frames8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) +{ + XMedianContext *s = ctx->priv; + ThreadData *td = arg; + AVFrame **in = td->in; + AVFrame *out = td->out; + const int nb_inputs = s->nb_inputs; + const int radius = s->radius; + int values[256]; + + for (int p = 0; p < s->nb_planes; p++) { + const int slice_start = (s->height[p] * jobnr) / nb_jobs; + const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs; + uint8_t *dst = out->data[p] + slice_start * out->linesize[p]; + + if (!((1 << p) & s->planes)) { + av_image_copy_plane(dst, out->linesize[p], + in[0]->data[p] + slice_start * in[0]->linesize[p], + in[0]->linesize[p], + s->linesize[p], slice_end - slice_start); + continue; + } + + for (int y = slice_start; y < slice_end; y++) { + for (int x = 0; x < s->width[p]; x++) { + for (int i = 0; i < nb_inputs; i++) + values[i] = in[i]->data[p][y * in[i]->linesize[p] + x]; + + AV_QSORT(values, nb_inputs, int, comparei); + dst[x] = values[radius]; + } + + dst += out->linesize[p]; + } + } + + return 0; +} + +static int process_frame(FFFrameSync *fs) +{ + AVFilterContext *ctx = fs->parent; + AVFilterLink *outlink = ctx->outputs[0]; + XMedianContext *s = fs->opaque; + AVFrame **in = s->frames; + AVFrame *out; + ThreadData td; + int i, ret; + + for (i = 0; i < s->nb_inputs; i++) { + if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0) + return ret; + } + + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!out) + return AVERROR(ENOMEM); + out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base); + + td.in = in; + td.out = out; + ctx->internal->execute(ctx, s->median_frames, &td, NULL, FFMIN(s->height[1], ff_filter_get_nb_threads(ctx))); + + return ff_filter_frame(outlink, out); +} + +static int config_output(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + XMedianContext *s = ctx->priv; + AVRational frame_rate = ctx->inputs[0]->frame_rate; + AVFilterLink *inlink = ctx->inputs[0]; + int height = ctx->inputs[0]->h; + int width = ctx->inputs[0]->w; + FFFrameSyncIn *in; + int i, ret; + + for (int i = 1; i < s->nb_inputs; i++) { + if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) { + av_log(ctx, AV_LOG_ERROR, "Input %d size (%dx%d) does not match input %d size (%dx%d).\n", i, ctx->inputs[i]->w, ctx->inputs[i]->h, 0, width, height); + return AVERROR(EINVAL); + } + } + + s->desc = av_pix_fmt_desc_get(outlink->format); + if (!s->desc) + return AVERROR_BUG; + s->nb_planes = av_pix_fmt_count_planes(outlink->format); + s->depth = s->desc->comp[0].depth; + s->max = (1 << s->depth) - 1; + + if (s->depth <= 8) + s->median_frames = median_frames8; + else + s->median_frames = median_frames16; + + if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0) + return ret; + + s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w); + s->width[0] = s->width[3] = inlink->w; + s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h); + s->height[0] = s->height[3] = inlink->h; + + outlink->w = width; + outlink->h = height; + outlink->frame_rate = frame_rate; + + if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0) + return ret; + + in = s->fs.in; + s->fs.opaque = s; + s->fs.on_event = process_frame; + + for (i = 0; i < s->nb_inputs; i++) { + AVFilterLink *inlink = ctx->inputs[i]; + + in[i].time_base = inlink->time_base; + in[i].sync = 1; + in[i].before = EXT_STOP; + in[i].after = EXT_STOP; + } + + ret = ff_framesync_configure(&s->fs); + outlink->time_base = s->fs.time_base; + + return ret; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + XMedianContext *s = ctx->priv; + + ff_framesync_uninit(&s->fs); + av_freep(&s->frames); + + for (int i = 0; i < ctx->nb_inputs; i++) + av_freep(&ctx->input_pads[i].name); +} + +static int activate(AVFilterContext *ctx) +{ + XMedianContext *s = ctx->priv; + return ff_framesync_activate(&s->fs); +} + +#define OFFSET(x) offsetof(XMedianContext, x) +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM + +static const AVOption xmedian_options[] = { + { "nb_inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 3, 255, .flags = FLAGS }, + { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, .flags = FLAGS }, + { NULL }, +}; + +static const AVFilterPad outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_output, + }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(xmedian); + +AVFilter ff_vf_xmedian = { + .name = "xmedian", + .description = NULL_IF_CONFIG_SMALL("Pick median pixels from several video inputs."), + .priv_size = sizeof(XMedianContext), + .priv_class = &xmedian_class, + .query_formats = query_formats, + .outputs = outputs, + .init = init, + .uninit = uninit, + .activate = activate, + .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_SLICE_THREADS, +}; 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