From 8bee929b86c23b8b398780b2d5ec5e37dc2fb66a Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Sun, 14 Aug 2016 18:10:55 +0200 Subject: [PATCH] avfilter: add bitplanenoise filter --- doc/filters.texi | 11 ++ libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/vf_bitplanenoise.c | 258 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 271 insertions(+) create mode 100644 libavfilter/vf_bitplanenoise.c diff --git a/doc/filters.texi b/doc/filters.texi index 3a9e251..e65cb48 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -4410,6 +4410,17 @@ The filter accepts the following option: Set the minimal luminance value. Default is @code{16}. @end table +@section bitplanenoise + +Show & measure bit plane noise. + +The filter accepts the following option: + +@table @option +@item bitplane +Set which plane to analyze & filter. +@end table + @section blackdetect Detect video intervals that are (almost) completely black. Can be diff --git a/libavfilter/Makefile b/libavfilter/Makefile index 0d94f84..8cf1cab 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -125,6 +125,7 @@ OBJS-$(CONFIG_ALPHAMERGE_FILTER) += vf_alphamerge.o OBJS-$(CONFIG_ATADENOISE_FILTER) += vf_atadenoise.o OBJS-$(CONFIG_BBOX_FILTER) += bbox.o vf_bbox.o OBJS-$(CONFIG_BENCH_FILTER) += f_bench.o +OBJS-$(CONFIG_BITPLANENOISE_FILTER) += vf_bitplanenoise.o OBJS-$(CONFIG_BLACKDETECT_FILTER) += vf_blackdetect.o # video filters diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index feed4f8..74e56cc 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -143,6 +143,7 @@ void avfilter_register_all(void) REGISTER_FILTER(ASS, ass, vf); REGISTER_FILTER(BENCH, bench, vf); REGISTER_FILTER(BBOX, bbox, vf); + REGISTER_FILTER(BITPLANENOISE, bitplanenoise, vf); REGISTER_FILTER(BLACKDETECT, blackdetect, vf); REGISTER_FILTER(BLACKFRAME, blackframe, vf); REGISTER_FILTER(BLEND, blend, vf); diff --git a/libavfilter/vf_bitplanenoise.c b/libavfilter/vf_bitplanenoise.c new file mode 100644 index 0000000..7badad2 --- /dev/null +++ b/libavfilter/vf_bitplanenoise.c @@ -0,0 +1,258 @@ +/* + * Copyright (c) 2016 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/opt.h" +#include "libavutil/imgutils.h" +#include "avfilter.h" +#include "formats.h" +#include "internal.h" +#include "video.h" + +typedef struct BPNContext { + const AVClass *class; + + int bitplane; + + int nb_planes; + int planeheight[4]; + int planewidth[4]; + int depth; +} BPNContext; + +#define OFFSET(x) offsetof(BPNContext, x) +#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM +static const AVOption bitplanenoise_options[] = { + { "bitplane", "set bit plane to filter", OFFSET(bitplane), AV_OPT_TYPE_INT, {.i64=1}, 1, 16, FLAGS}, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(bitplanenoise); + +static int query_formats(AVFilterContext *ctx) +{ + static const enum AVPixelFormat pixfmts[] = { + AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, + AV_PIX_FMT_YUV440P, + AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P, + AV_PIX_FMT_YUVJ440P, + AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV420P9, + AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10, + 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_YUV444P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV420P16, + AV_PIX_FMT_GRAY8, + AV_PIX_FMT_GRAY16, + AV_PIX_FMT_NONE + }; + + AVFilterFormats *formats = ff_make_format_list(pixfmts); + if (!formats) + return AVERROR(ENOMEM); + return ff_set_common_formats(ctx, formats); +} + +static int config_input(AVFilterLink *inlink) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + AVFilterContext *ctx = inlink->dst; + BPNContext *s = ctx->priv; + + s->nb_planes = desc->nb_components; + + s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); + s->planeheight[0] = s->planeheight[3] = inlink->h; + s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w); + s->planewidth[0] = s->planewidth[3] = inlink->w; + + s->depth = desc->comp[0].depth; + + return 0; +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *in) +{ + AVFilterContext *ctx = inlink->dst; + AVFilterLink *outlink = ctx->outputs[0]; + BPNContext *s = ctx->priv; + const int mask = (1 << (s->bitplane - 1)); + const int factor = (1 << s->depth) - 1; + float stats[4] = { 0 }; + char metabuf[128]; + int plane, y, x, bit; + 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); + + if (s->depth <= 8) { + for (plane = 0; plane < s->nb_planes; plane++) { + const int linesize = in->linesize[plane]; + const int dlinesize = out->linesize[plane]; + uint8_t *val = in->data[plane]; + uint8_t *dst = out->data[plane]; + + for (y = 0; y < s->planeheight[plane] - 1; y++) { + bit = (((val[0] & mask) == (val[0 + 1] & mask)) + + ((val[0] & mask) == (val[0 + 1 + linesize] & mask)) + + ((val[0] & mask) == (val[0 + linesize] & mask))) > 1; + dst[0] = factor * bit; + stats[plane] += bit; + + for (x = 1; x < s->planewidth[plane] - 1; x++) { + bit = (((val[x] & mask) == (val[x - 1] & mask)) + + ((val[x] & mask) == (val[x + 1] & mask)) + + ((val[x] & mask) == (val[x + linesize] & mask))) > 1; + dst[x] = factor * bit; + stats[plane] += bit; + } + + bit = (((val[x] & mask) == (val[x - 1] & mask)) + + ((val[x] & mask) == (val[x - 1 - linesize] & mask)) + + ((val[x] & mask) == (val[x - linesize] & mask))) > 1; + dst[x] = factor * bit; + stats[plane] += bit; + + val += linesize; + dst += dlinesize; + } + + bit = (((val[0] & mask) == (val[0 + 1] & mask)) + + ((val[0] & mask) == (val[0 + 1 - linesize] & mask)) + + ((val[0] & mask) == (val[0 - linesize] & mask))) > 1; + dst[0] = factor * bit; + stats[plane] += bit; + + for (x = 1; x < s->planewidth[plane] - 1; x++) { + bit = (((val[x] & mask) == (val[x - 1] & mask)) + + ((val[x] & mask) == (val[x + 1] & mask)) + + ((val[x] & mask) == (val[x - linesize] & mask))) > 1; + dst[x] = factor * bit; + stats[plane] += bit; + } + + bit = (((val[x] & mask) == (val[x - 1] & mask)) + + ((val[x] & mask) == (val[x - 1 - linesize] & mask)) + + ((val[x] & mask) == (val[x - linesize] & mask))) > 1; + dst[x] = factor * bit; + stats[plane] += bit; + } + } else { + for (plane = 0; plane < s->nb_planes; plane++) { + const int linesize = in->linesize[plane] / 2; + const int dlinesize = out->linesize[plane] / 2; + uint16_t *val = (uint16_t *)in->data[plane]; + uint16_t *dst = (uint16_t *)out->data[plane]; + + val = (uint16_t *)in->data[plane]; + for (y = 0; y < s->planeheight[plane] - 1; y++) { + bit = (((val[0] & mask) == (val[0 + 1] & mask)) + + ((val[0] & mask) == (val[0 + 1 + linesize] & mask)) + + ((val[0] & mask) == (val[0 + linesize] & mask))) > 1; + dst[0] = factor * bit; + stats[plane] += bit; + + for (x = 1; x < s->planewidth[plane] - 1; x++) { + bit = (((val[x] & mask) == (val[x - 1] & mask)) + + ((val[x] & mask) == (val[x + 1] & mask)) + + ((val[x] & mask) == (val[x + linesize] & mask))) > 1; + dst[x] = factor * bit; + stats[plane] += bit; + } + + bit = (((val[x] & mask) == (val[x - 1] & mask)) + + ((val[x] & mask) == (val[x - 1 - linesize] & mask)) + + ((val[x] & mask) == (val[x - linesize] & mask))) > 1; + dst[x] = factor * bit; + stats[plane] += bit; + + val += linesize; + dst += dlinesize; + } + + bit = (((val[0] & mask) == (val[0 + 1] & mask)) + + ((val[0] & mask) == (val[0 + 1 - linesize] & mask)) + + ((val[0] & mask) == (val[0 - linesize] & mask))) > 1; + dst[0] = factor * bit; + stats[plane] += bit; + + for (x = 1; x < s->planewidth[plane] - 1; x++) { + bit = (((val[x] & mask) == (val[x - 1] & mask)) + + ((val[x] & mask) == (val[x + 1] & mask)) + + ((val[x] & mask) == (val[x - linesize] & mask))) > 1; + dst[x] = factor * bit; + stats[plane] += bit; + } + + bit = (((val[x] & mask) == (val[x - 1] & mask)) + + ((val[x] & mask) == (val[x - 1 - linesize] & mask)) + + ((val[x] & mask) == (val[x - linesize] & mask))) > 1; + dst[x] = factor * bit; + stats[plane] += bit; + } + } + + for (plane = 0; plane < s->nb_planes; plane++) { + char key[32]; + + stats[plane] /= s->planewidth[plane] * s->planeheight[plane]; + snprintf(key, sizeof(key), "lavfi.bitplanenoise.%d.%d", plane, s->bitplane); + snprintf(metabuf, sizeof(metabuf), "%f", 1. - stats[plane]); + av_dict_set(&out->metadata, key, metabuf, 0); + } + + av_frame_free(&in); + + return ff_filter_frame(outlink, out); +} + +static const AVFilterPad inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + .config_props = config_input, + }, + { NULL } +}; + +static const AVFilterPad outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFilter ff_vf_bitplanenoise = { + .name = "bitplanenoise", + .description = NULL_IF_CONFIG_SMALL("Show & measure bit plane noise."), + .priv_size = sizeof(BPNContext), + .query_formats = query_formats, + .inputs = inputs, + .outputs = outputs, + .priv_class = &bitplanenoise_class, + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, +}; -- 2.8.3