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avfilter: add bitplanenoise filter
This commit is contained in:
Paul B Mahol
parent
f85842b09e
commit
ed8d7e7a9b
@ -15,6 +15,7 @@ version <next>:
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- True Audio (TTA) muxer
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- crystalizer audio filter
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- acrusher audio filter
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- bitplanenoise video filter
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version 3.1:
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@ -4410,6 +4410,21 @@ The filter accepts the following option:
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Set the minimal luminance value. Default is @code{16}.
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@end table
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@section bitplanenoise
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Show and measure bit plane noise.
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The filter accepts the following options:
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@table @option
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@item bitplane
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Set which plane to analyze. Default is @code{1}.
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@item filter
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Filter out noisy pixels from @code{bitplane} set above.
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Default is disabled.
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@end table
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@section blackdetect
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Detect video intervals that are (almost) completely black. Can be
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@ -125,6 +125,7 @@ OBJS-$(CONFIG_ALPHAMERGE_FILTER) += vf_alphamerge.o
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OBJS-$(CONFIG_ATADENOISE_FILTER) += vf_atadenoise.o
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OBJS-$(CONFIG_BBOX_FILTER) += bbox.o vf_bbox.o
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OBJS-$(CONFIG_BENCH_FILTER) += f_bench.o
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OBJS-$(CONFIG_BITPLANENOISE_FILTER) += vf_bitplanenoise.o
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OBJS-$(CONFIG_BLACKDETECT_FILTER) += vf_blackdetect.o
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# video filters
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@ -143,6 +143,7 @@ void avfilter_register_all(void)
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REGISTER_FILTER(ASS, ass, vf);
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REGISTER_FILTER(BENCH, bench, vf);
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REGISTER_FILTER(BBOX, bbox, vf);
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REGISTER_FILTER(BITPLANENOISE, bitplanenoise, vf);
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REGISTER_FILTER(BLACKDETECT, blackdetect, vf);
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REGISTER_FILTER(BLACKFRAME, blackframe, vf);
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REGISTER_FILTER(BLEND, blend, vf);
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@ -30,7 +30,7 @@
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#include "libavutil/version.h"
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#define LIBAVFILTER_VERSION_MAJOR 6
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#define LIBAVFILTER_VERSION_MINOR 51
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#define LIBAVFILTER_VERSION_MINOR 52
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#define LIBAVFILTER_VERSION_MICRO 100
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#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
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227
libavfilter/vf_bitplanenoise.c
Normal file
227
libavfilter/vf_bitplanenoise.c
Normal file
@ -0,0 +1,227 @@
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/*
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* Copyright (c) 2016 Paul B Mahol
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*
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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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#include "libavutil/opt.h"
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#include "libavutil/imgutils.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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typedef struct BPNContext {
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const AVClass *class;
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int bitplane;
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int filter;
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int nb_planes;
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int planeheight[4];
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int planewidth[4];
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int depth;
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} BPNContext;
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#define OFFSET(x) offsetof(BPNContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption bitplanenoise_options[] = {
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{ "bitplane", "set bit plane to use for measuring noise", OFFSET(bitplane), AV_OPT_TYPE_INT, {.i64=1}, 1, 16, FLAGS},
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{ "filter", "show noisy pixels", OFFSET(filter), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(bitplanenoise);
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pixfmts[] = {
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
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AV_PIX_FMT_YUV440P,
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
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AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV420P9,
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AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10,
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AV_PIX_FMT_YUV440P10,
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AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
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AV_PIX_FMT_YUV440P12,
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AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
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AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV420P16,
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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_GRAY8,
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AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_NONE
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};
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AVFilterFormats *formats = ff_make_format_list(pixfmts);
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if (!formats)
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return AVERROR(ENOMEM);
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return ff_set_common_formats(ctx, formats);
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}
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static int config_input(AVFilterLink *inlink)
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{
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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AVFilterContext *ctx = inlink->dst;
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BPNContext *s = ctx->priv;
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s->nb_planes = desc->nb_components;
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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->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->depth = desc->comp[0].depth;
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return 0;
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}
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#define CHECK_BIT(x, a, b, c) { \
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bit = (((val[(x)] & mask) == (val[(x) + (a)] & mask)) + \
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((val[(x)] & mask) == (val[(x) + (b)] & mask)) + \
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((val[(x)] & mask) == (val[(x) + (c)] & mask))) > 1; \
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if (dst) \
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dst[(x)] = factor * bit; \
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stats[plane] += bit; }
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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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AVFilterLink *outlink = ctx->outputs[0];
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BPNContext *s = ctx->priv;
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const int mask = (1 << (s->bitplane - 1));
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const int factor = (1 << s->depth) - 1;
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float stats[4] = { 0 };
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char metabuf[128];
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int plane, y, x, bit;
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AVFrame *out = s->filter ? NULL : in;
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if (!out) {
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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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if (s->depth <= 8) {
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for (plane = 0; plane < s->nb_planes; plane++) {
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const int linesize = in->linesize[plane];
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const int dlinesize = out->linesize[plane];
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uint8_t *val = in->data[plane];
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uint8_t *dst = s->filter ? out->data[plane]: NULL;
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for (y = 0; y < s->planeheight[plane] - 1; y++) {
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CHECK_BIT(0, 1, 1 + linesize, linesize)
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for (x = 1; x < s->planewidth[plane] - 1; x++) {
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CHECK_BIT(x, -1, 1, linesize)
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}
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CHECK_BIT(x, -1, -1 + linesize, linesize)
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val += linesize;
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if (dst)
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dst += dlinesize;
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}
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CHECK_BIT(0, 1, 1 - linesize, -linesize)
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for (x = 1; x < s->planewidth[plane] - 1; x++) {
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CHECK_BIT(x, -1, 1, -linesize)
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}
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CHECK_BIT(x, -1, -1 - linesize, -linesize)
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}
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} else {
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for (plane = 0; plane < s->nb_planes; plane++) {
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const int linesize = in->linesize[plane] / 2;
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const int dlinesize = out->linesize[plane] / 2;
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uint16_t *val = (uint16_t *)in->data[plane];
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uint16_t *dst = s->filter ? (uint16_t *)out->data[plane] : NULL;
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val = (uint16_t *)in->data[plane];
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for (y = 0; y < s->planeheight[plane] - 1; y++) {
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CHECK_BIT(0, 1, 1 + linesize, linesize)
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for (x = 1; x < s->planewidth[plane] - 1; x++) {
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CHECK_BIT(x, -1, 1, linesize)
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}
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CHECK_BIT(x, -1, -1 + linesize, linesize)
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val += linesize;
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if (dst)
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dst += dlinesize;
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}
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CHECK_BIT(0, 1, 1 - linesize, -linesize)
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for (x = 1; x < s->planewidth[plane] - 1; x++) {
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CHECK_BIT(x, -1, 1, -linesize)
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}
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CHECK_BIT(x, -1, -1 -linesize, -linesize)
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}
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}
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for (plane = 0; plane < s->nb_planes; plane++) {
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char key[32];
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stats[plane] /= s->planewidth[plane] * s->planeheight[plane];
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snprintf(key, sizeof(key), "lavfi.bitplanenoise.%d.%d", plane, s->bitplane);
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snprintf(metabuf, sizeof(metabuf), "%f", 1. - 2.* fabsf((stats[plane] - 0.5)));
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av_dict_set(&out->metadata, key, metabuf, 0);
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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 const AVFilterPad inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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.config_props = config_input,
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},
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{ NULL }
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};
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static const AVFilterPad 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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AVFilter ff_vf_bitplanenoise = {
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.name = "bitplanenoise",
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.description = NULL_IF_CONFIG_SMALL("Measure bit plane noise."),
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.priv_size = sizeof(BPNContext),
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.query_formats = query_formats,
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.inputs = inputs,
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.outputs = outputs,
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.priv_class = &bitplanenoise_class,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
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};
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