mirror of https://git.ffmpeg.org/ffmpeg.git
avfilter: add deblock filter
Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol
parent
e5ba5fab49
commit
21da248b5f
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@ -2,6 +2,10 @@ Entries are sorted chronologically from oldest to youngest within each release,
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releases are sorted from youngest to oldest.
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version <next>:
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- deblock filter
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version 4.0:
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- Bitstream filters for editing metadata in H.264, HEVC and MPEG-2 streams
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- Dropped support for OpenJPEG versions 2.0 and below. Using OpenJPEG now
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requires 2.1 (or later) and pkg-config.
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@ -7078,6 +7078,65 @@ e.g. banding detection threshold is triggered for all color components.
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The default is disabled.
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@end table
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@section deblock
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Remove blocking artifacts from input video.
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The filter accepts the following options:
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@table @option
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@item filter
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Set filter type, can be @var{weak} or @var{strong}. Default is @var{strong}.
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This controls what kind of deblocking is applied.
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@item block
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Set size of block, allowed range is from 4 to 512. Default is @var{8}.
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@item alpha
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@item beta
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@item gamma
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@item delta
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Set blocking detection thresholds. Allowed range is 0 to 1.
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Defaults are: @var{0.098} for @var{alpha} and @var{0.05} for the rest.
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Using higher threshold gives more deblocking strength.
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Setting @var{alpha} controls threshold detection at exact edge of block.
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Remaining options controls threshold detection near the edge. Each one for
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below/above or left/right. Setting any of those to @var{0} disables
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deblocking.
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@item planes
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Set planes to filter. Default is to filter all available planes.
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@end table
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@subsection Examples
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@itemize
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@item
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Deblock using weak filter and block size of 4 pixels.
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@example
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deblock=filter=weak:block=4
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@end example
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@item
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Deblock using strong filter, block size of 4 pixels and custom thresholds for
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deblocking more edges.
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@example
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deblock=filter=strong:block=4:alpha=0.12:beta=0.07:gamma=0.06:delta=0.05
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@end example
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@item
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Similar as above, but filter only first plane.
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@example
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deblock=filter=strong:block=4:alpha=0.12:beta=0.07:gamma=0.06:delta=0.05:planes=1
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@end example
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@item
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Similar as above, but filter only second and third plane.
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@example
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deblock=filter=strong:block=4:alpha=0.12:beta=0.07:gamma=0.06:delta=0.05:planes=6
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@end example
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@end itemize
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@anchor{decimate}
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@section decimate
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@ -173,6 +173,7 @@ OBJS-$(CONFIG_CURVES_FILTER) += vf_curves.o
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OBJS-$(CONFIG_DATASCOPE_FILTER) += vf_datascope.o
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OBJS-$(CONFIG_DCTDNOIZ_FILTER) += vf_dctdnoiz.o
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OBJS-$(CONFIG_DEBAND_FILTER) += vf_deband.o
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OBJS-$(CONFIG_DEBLOCK_FILTER) += vf_deblock.o
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OBJS-$(CONFIG_DECIMATE_FILTER) += vf_decimate.o
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OBJS-$(CONFIG_DECONVOLVE_FILTER) += vf_convolve.o framesync.o
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OBJS-$(CONFIG_DEFLATE_FILTER) += vf_neighbor.o
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@ -165,6 +165,7 @@ extern AVFilter ff_vf_curves;
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extern AVFilter ff_vf_datascope;
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extern AVFilter ff_vf_dctdnoiz;
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extern AVFilter ff_vf_deband;
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extern AVFilter ff_vf_deblock;
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extern AVFilter ff_vf_decimate;
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extern AVFilter ff_vf_deconvolve;
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extern AVFilter ff_vf_deflate;
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@ -30,7 +30,7 @@
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#include "libavutil/version.h"
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#define LIBAVFILTER_VERSION_MAJOR 7
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#define LIBAVFILTER_VERSION_MINOR 18
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#define LIBAVFILTER_VERSION_MINOR 19
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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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@ -0,0 +1,413 @@
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/*
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* Copyright (c) 2018 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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/*
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* Based on paper: A Simple and Efficient Deblocking Algorithm for Low Bit-Rate Video Coding.
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*/
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#include "libavutil/imgutils.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.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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enum FilterType { WEAK, STRONG, NB_FILTER };
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typedef struct DeblockContext {
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const AVClass *class;
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const AVPixFmtDescriptor *desc;
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int filter;
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int block;
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int planes;
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float alpha;
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float beta;
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float gamma;
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float delta;
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int ath;
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int bth;
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int gth;
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int dth;
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int max;
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int depth;
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int bpc;
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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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void (*deblockh)(uint8_t *dst, ptrdiff_t dst_linesize, int block,
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int ath, int bth, int gth, int dth, int max);
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void (*deblockv)(uint8_t *dst, ptrdiff_t dst_linesize, int block,
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int ath, int bth, int gth, int dth, int max);
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} DeblockContext;
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pixel_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_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_GRAY16,
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AV_PIX_FMT_NONE
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};
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AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
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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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#define WEAK_HFILTER(name, type, ldiv) \
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static void deblockh##name##_weak(uint8_t *dstp, ptrdiff_t dst_linesize, int block, \
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int ath, int bth, int gth, int dth, int max) \
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{ \
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type *dst; \
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int x; \
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\
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dst = (type *)dstp; \
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dst_linesize /= ldiv; \
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\
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for (x = 0; x < block; x++) { \
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int delta = dst[x] - dst[x - dst_linesize]; \
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int A, B, C, D, a, b, c, d; \
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\
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if (FFABS(delta) >= ath || \
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FFABS(dst[x - 1 * dst_linesize] - dst[x - 2 * dst_linesize]) >= bth || \
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FFABS(dst[x + 0 * dst_linesize] - dst[x + 1 * dst_linesize]) >= gth) \
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continue; \
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\
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A = dst[x - 2 * dst_linesize]; \
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B = dst[x - 1 * dst_linesize]; \
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C = dst[x + 0 * dst_linesize]; \
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D = dst[x + 1 * dst_linesize]; \
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\
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a = A + delta / 8; \
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b = B + delta / 2; \
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c = C - delta / 2; \
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d = D - delta / 8; \
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\
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dst[x - 2 * dst_linesize] = av_clip(a, 0, max); \
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dst[x - 1 * dst_linesize] = av_clip(b, 0, max); \
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dst[x + 0 * dst_linesize] = av_clip(c, 0, max); \
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dst[x + 1 * dst_linesize] = av_clip(d, 0, max); \
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} \
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}
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WEAK_HFILTER(8, uint8_t, 1)
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WEAK_HFILTER(16, uint16_t, 2)
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#define WEAK_VFILTER(name, type, ldiv) \
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static void deblockv##name##_weak(uint8_t *dstp, ptrdiff_t dst_linesize, int block, \
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int ath, int bth, int gth, int dth, int max) \
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{ \
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type *dst; \
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int y; \
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\
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dst = (type *)dstp; \
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dst_linesize /= ldiv; \
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\
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for (y = 0; y < block; y++) { \
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int delta = dst[0] - dst[-1]; \
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int A, B, C, D, a, b, c, d; \
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\
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if (FFABS(delta) >= ath || \
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FFABS(dst[-1] - dst[-2]) >= bth || \
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FFABS(dst[0] - dst[1]) >= gth) \
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continue; \
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\
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A = dst[-2]; \
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B = dst[-1]; \
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C = dst[+0]; \
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D = dst[+1]; \
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\
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a = A + delta / 8; \
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b = B + delta / 2; \
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c = C - delta / 2; \
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d = D - delta / 8; \
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\
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dst[-2] = av_clip(a, 0, max); \
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dst[-1] = av_clip(b, 0, max); \
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dst[+0] = av_clip(c, 0, max); \
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dst[+1] = av_clip(d, 0, max); \
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\
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dst += dst_linesize; \
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} \
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}
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WEAK_VFILTER(8, uint8_t, 1)
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WEAK_VFILTER(16, uint16_t, 2)
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#define STRONG_HFILTER(name, type, ldiv) \
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static void deblockh##name##_strong(uint8_t *dstp, ptrdiff_t dst_linesize, int block,\
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int ath, int bth, int gth, int dth, int max) \
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{ \
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type *dst; \
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int x; \
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\
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dst = (type *)dstp; \
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dst_linesize /= ldiv; \
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\
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for (x = 0; x < block; x++) { \
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int A, B, C, D, E, F, a, b, c, d, e, f; \
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int delta = dst[x] - dst[x - dst_linesize]; \
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\
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if (FFABS(delta) >= ath || \
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FFABS(dst[x - 1 * dst_linesize] - dst[x - 2 * dst_linesize]) >= bth || \
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FFABS(dst[x + 1 * dst_linesize] - dst[x + 2 * dst_linesize]) >= gth || \
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FFABS(dst[x + 0 * dst_linesize] - dst[x + 1 * dst_linesize]) >= dth) \
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continue; \
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\
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A = dst[x - 3 * dst_linesize]; \
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B = dst[x - 2 * dst_linesize]; \
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C = dst[x - 1 * dst_linesize]; \
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D = dst[x + 0 * dst_linesize]; \
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E = dst[x + 1 * dst_linesize]; \
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F = dst[x + 2 * dst_linesize]; \
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\
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a = A + delta / 8; \
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b = B + delta / 4; \
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c = C + delta / 2; \
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d = D - delta / 2; \
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e = E - delta / 4; \
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f = F - delta / 8; \
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\
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dst[x - 3 * dst_linesize] = av_clip(a, 0, max); \
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dst[x - 2 * dst_linesize] = av_clip(b, 0, max); \
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dst[x - 1 * dst_linesize] = av_clip(c, 0, max); \
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dst[x + 0 * dst_linesize] = av_clip(d, 0, max); \
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dst[x + 1 * dst_linesize] = av_clip(e, 0, max); \
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dst[x + 2 * dst_linesize] = av_clip(f, 0, max); \
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} \
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}
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STRONG_HFILTER(8, uint8_t, 1)
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STRONG_HFILTER(16, uint16_t, 2)
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#define STRONG_VFILTER(name, type, ldiv) \
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static void deblockv##name##_strong(uint8_t *dstp, ptrdiff_t dst_linesize, int block,\
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int ath, int bth, int gth, int dth, int max) \
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{ \
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type *dst; \
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int y; \
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\
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dst = (type *)dstp; \
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dst_linesize /= ldiv; \
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\
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for (y = 0; y < block; y++) { \
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int A, B, C, D, E, F, a, b, c, d, e, f; \
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int delta = dst[0] - dst[-1]; \
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\
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if (FFABS(delta) >= ath || \
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FFABS(dst[-1] - dst[-2]) >= bth || \
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FFABS(dst[+1] - dst[+2]) >= gth || \
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FFABS(dst[+0] - dst[+1]) >= dth) \
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continue; \
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\
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A = dst[-3]; \
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B = dst[-2]; \
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C = dst[-1]; \
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D = dst[+0]; \
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E = dst[+1]; \
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F = dst[+2]; \
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\
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a = A + delta / 8; \
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b = B + delta / 4; \
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c = C + delta / 2; \
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d = D - delta / 2; \
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e = E - delta / 4; \
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f = F - delta / 8; \
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\
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dst[-3] = av_clip(a, 0, max); \
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dst[-2] = av_clip(b, 0, max); \
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dst[-1] = av_clip(c, 0, max); \
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dst[+0] = av_clip(d, 0, max); \
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dst[+1] = av_clip(e, 0, max); \
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dst[+2] = av_clip(f, 0, max); \
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\
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dst += dst_linesize; \
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} \
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}
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STRONG_VFILTER(8, uint8_t, 1)
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STRONG_VFILTER(16, uint16_t, 2)
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static int config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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DeblockContext *s = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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s->desc = av_pix_fmt_desc_get(outlink->format);
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if (!s->desc)
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return AVERROR_BUG;
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s->nb_planes = av_pix_fmt_count_planes(outlink->format);
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s->depth = s->desc->comp[0].depth;
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s->bpc = (s->depth + 7) / 8;
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s->max = (1 << s->depth) - 1;
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s->ath = s->alpha * s->max;
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s->bth = s->beta * s->max;
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s->gth = s->gamma * s->max;
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s->dth = s->delta * s->max;
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if (s->depth <= 8 && s->filter == WEAK) {
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s->deblockh = deblockh8_weak;
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s->deblockv = deblockv8_weak;
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} else if (s->depth >= 8 && s->filter == WEAK) {
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s->deblockh = deblockh16_weak;
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s->deblockv = deblockv16_weak;
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}
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if (s->depth <= 8 && s->filter == STRONG) {
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s->deblockh = deblockh8_strong;
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s->deblockv = deblockv8_strong;
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} else if (s->depth >= 8 && s->filter == STRONG) {
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s->deblockh = deblockh16_strong;
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s->deblockv = deblockv16_strong;
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}
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|
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s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
|
||||
s->planewidth[0] = s->planewidth[3] = inlink->w;
|
||||
|
||||
s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
|
||||
s->planeheight[0] = s->planeheight[3] = inlink->h;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
|
||||
{
|
||||
AVFilterContext *ctx = inlink->dst;
|
||||
AVFilterLink *outlink = ctx->outputs[0];
|
||||
DeblockContext *s = ctx->priv;
|
||||
const int block = s->block;
|
||||
AVFrame *out;
|
||||
int plane, x, y;
|
||||
|
||||
if (av_frame_is_writable(in)) {
|
||||
out = in;
|
||||
} else {
|
||||
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);
|
||||
}
|
||||
|
||||
for (plane = 0; plane < s->nb_planes; plane++) {
|
||||
const int width = s->planewidth[plane];
|
||||
const int height = s->planeheight[plane];
|
||||
const uint8_t *src = (const uint8_t *)in->data[plane];
|
||||
uint8_t *dst = (uint8_t *)out->data[plane];
|
||||
|
||||
if (in != out)
|
||||
av_image_copy_plane(dst, out->linesize[plane],
|
||||
src, in->linesize[plane],
|
||||
width * s->bpc, height);
|
||||
|
||||
if (!((1 << plane) & s->planes))
|
||||
continue;
|
||||
|
||||
for (x = block; x < width; x += block)
|
||||
s->deblockv(dst + x * s->bpc, out->linesize[plane],
|
||||
FFMIN(block, height), s->ath, s->bth, s->gth, s->dth, s->max);
|
||||
|
||||
for (y = block; y < height; y += block) {
|
||||
dst += out->linesize[plane] * block;
|
||||
|
||||
s->deblockh(dst, out->linesize[plane],
|
||||
FFMIN(block, width),
|
||||
s->ath, s->bth, s->gth, s->dth, s->max);
|
||||
|
||||
for (x = block; x < width; x += block) {
|
||||
s->deblockh(dst + x * s->bpc, out->linesize[plane],
|
||||
FFMIN(block, width - x),
|
||||
s->ath, s->bth, s->gth, s->dth, s->max);
|
||||
s->deblockv(dst + x * s->bpc, out->linesize[plane],
|
||||
FFMIN(block, height - y),
|
||||
s->ath, s->bth, s->gth, s->dth, s->max);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (in != out)
|
||||
av_frame_free(&in);
|
||||
return ff_filter_frame(outlink, out);
|
||||
}
|
||||
|
||||
#define OFFSET(x) offsetof(DeblockContext, x)
|
||||
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
|
||||
|
||||
static const AVOption deblock_options[] = {
|
||||
{ "filter", "set type of filter", OFFSET(filter), AV_OPT_TYPE_INT, {.i64=STRONG},0, 1, FLAGS, "filter" },
|
||||
{ "weak", 0, 0, AV_OPT_TYPE_CONST, {.i64=WEAK}, 0, 0, FLAGS, "filter" },
|
||||
{ "strong", 0, 0, AV_OPT_TYPE_CONST, {.i64=STRONG},0, 0, FLAGS, "filter" },
|
||||
{ "block", "set size of block", OFFSET(block), AV_OPT_TYPE_INT, {.i64=8}, 4, 512, FLAGS },
|
||||
{ "alpha", "set 1st detection threshold", OFFSET(alpha), AV_OPT_TYPE_FLOAT, {.dbl=.098}, 0, 1, FLAGS },
|
||||
{ "beta", "set 2nd detection threshold", OFFSET(beta), AV_OPT_TYPE_FLOAT, {.dbl=.05}, 0, 1, FLAGS },
|
||||
{ "gamma", "set 3rd detection threshold", OFFSET(gamma), AV_OPT_TYPE_FLOAT, {.dbl=.05}, 0, 1, FLAGS },
|
||||
{ "delta", "set 4th detection threshold", OFFSET(delta), AV_OPT_TYPE_FLOAT, {.dbl=.05}, 0, 1, FLAGS },
|
||||
{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, FLAGS },
|
||||
{ NULL },
|
||||
};
|
||||
|
||||
static const AVFilterPad inputs[] = {
|
||||
{
|
||||
.name = "default",
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.filter_frame = filter_frame,
|
||||
},
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
static const AVFilterPad outputs[] = {
|
||||
{
|
||||
.name = "default",
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.config_props = config_output,
|
||||
},
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
AVFILTER_DEFINE_CLASS(deblock);
|
||||
|
||||
AVFilter ff_vf_deblock = {
|
||||
.name = "deblock",
|
||||
.description = NULL_IF_CONFIG_SMALL("Deblock video."),
|
||||
.priv_size = sizeof(DeblockContext),
|
||||
.priv_class = &deblock_class,
|
||||
.query_formats = query_formats,
|
||||
.inputs = inputs,
|
||||
.outputs = outputs,
|
||||
};
|
||||
Loading…
Reference in New Issue