mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-25 00:32:31 +00:00
Clément Bœsch
parent
a6f5e25ad9
commit
c29b532a94
@ -31,6 +31,7 @@ version <next>:
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- MediaCodec HEVC decoding
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- TrueHD encoder
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- Meridian Lossless Packing (MLP) encoder
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- Non-Local Means (nlmeans) denoising filter
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version 3.1:
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@ -9695,6 +9695,41 @@ Negate input video.
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It accepts an integer in input; if non-zero it negates the
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alpha component (if available). The default value in input is 0.
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@section nlmeans
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Denoise frames using Non-Local Means algorithm.
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Each pixel is adjusted by looking for other pixels with similar contexts. This
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context similarity is defined by comparing their surrounding patches of size
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@option{p}x@option{p}. Patches are searched in an area of @option{r}x@option{r}
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around the pixel.
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Note that the research area defines centers for patches, which means some
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patches will be made of pixels outside that research area.
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The filter accepts the following options.
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@table @option
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@item s
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Set denoising strength.
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@item p
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Set patch size.
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@item pc
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Same as @option{p} but for chroma planes.
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The default value is @var{0} and means automatic.
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@item r
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Set research size.
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@item rc
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Same as @option{r} but for chroma planes.
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The default value is @var{0} and means automatic.
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@end table
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@section nnedi
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Deinterlace video using neural network edge directed interpolation.
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@ -220,6 +220,7 @@ OBJS-$(CONFIG_METADATA_FILTER) += f_metadata.o
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OBJS-$(CONFIG_MINTERPOLATE_FILTER) += vf_minterpolate.o motion_estimation.o
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OBJS-$(CONFIG_MPDECIMATE_FILTER) += vf_mpdecimate.o
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OBJS-$(CONFIG_NEGATE_FILTER) += vf_lut.o
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OBJS-$(CONFIG_NLMEANS_FILTER) += vf_nlmeans.o
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OBJS-$(CONFIG_NNEDI_FILTER) += vf_nnedi.o
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OBJS-$(CONFIG_NOFORMAT_FILTER) += vf_format.o
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OBJS-$(CONFIG_NOISE_FILTER) += vf_noise.o
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@ -354,7 +355,7 @@ SKIPHEADERS-$(CONFIG_OPENCL) += opencl_internal.h deshake_opencl
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OBJS-$(CONFIG_SHARED) += log2_tab.o
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TOOLS = graph2dot
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TESTPROGS = drawutils filtfmts formats
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TESTPROGS = drawutils filtfmts formats integral
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TOOLS-$(CONFIG_LIBZMQ) += zmqsend
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@ -237,6 +237,7 @@ void avfilter_register_all(void)
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REGISTER_FILTER(MINTERPOLATE, minterpolate, vf);
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REGISTER_FILTER(MPDECIMATE, mpdecimate, vf);
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REGISTER_FILTER(NEGATE, negate, vf);
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REGISTER_FILTER(NLMEANS, nlmeans, vf);
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REGISTER_FILTER(NNEDI, nnedi, vf);
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REGISTER_FILTER(NOFORMAT, noformat, vf);
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REGISTER_FILTER(NOISE, noise, vf);
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92
libavfilter/tests/integral.c
Normal file
92
libavfilter/tests/integral.c
Normal file
@ -0,0 +1,92 @@
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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 "libavfilter/vf_nlmeans.c"
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static void display_integral(const uint32_t *ii, int w, int h, int lz_32)
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{
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int x, y;
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x++)
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printf(" %7x", ii[y*lz_32 + x]);
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printf("\n");
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}
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printf("---------------\n");
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}
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int main(void)
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{
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int ret = 0, xoff, yoff;
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// arbitrary test source of size 6x4 and linesize=8
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const int w = 6, h = 5, lz = 8;
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static const uint8_t src[] = {
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0xb0, 0x71, 0xfb, 0xd8, 0x01, 0xd9, /***/ 0x01, 0x02,
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0x51, 0x8e, 0x41, 0x0f, 0x84, 0x58, /***/ 0x03, 0x04,
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0xc7, 0x8d, 0x07, 0x70, 0x5c, 0x47, /***/ 0x05, 0x06,
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0x09, 0x4e, 0xfc, 0x74, 0x8f, 0x9a, /***/ 0x07, 0x08,
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0x60, 0x8e, 0x20, 0xaa, 0x95, 0x7d, /***/ 0x09, 0x0a,
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};
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const int e = 3;
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const int ii_w = w+e*2, ii_h = h+e*2;
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// align to 4 the linesize, "+1" is for the space of the left 0-column
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const int ii_lz_32 = ((ii_w + 1) + 3) & ~3;
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// "+1" is for the space of the top 0-line
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uint32_t *ii = av_mallocz_array(ii_h + 1, ii_lz_32 * sizeof(*ii));
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uint32_t *ii2 = av_mallocz_array(ii_h + 1, ii_lz_32 * sizeof(*ii2));
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uint32_t *ii_start = ii + ii_lz_32 + 1; // skip top 0-line and left 0-column
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uint32_t *ii_start2 = ii2 + ii_lz_32 + 1; // skip top 0-line and left 0-column
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if (!ii || !ii2)
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return -1;
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for (yoff = -e; yoff <= e; yoff++) {
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for (xoff = -e; xoff <= e; xoff++) {
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int x, y;
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printf("xoff=%d yoff=%d\n", xoff, yoff);
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compute_ssd_integral_image(ii_start, ii_lz_32,
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src, lz, xoff, yoff, e, w, h);
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display_integral(ii_start, ii_w, ii_h, ii_lz_32);
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compute_unsafe_ssd_integral_image(ii_start2, ii_lz_32,
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0, 0,
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src, lz,
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xoff, yoff, e, w, h,
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ii_w, ii_h);
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display_integral(ii_start2, ii_w, ii_h, ii_lz_32);
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if (memcmp(ii, ii2, (ii_h+1) * ii_lz_32 * sizeof(*ii))) {
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printf("Integral mismatch\n");
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ret = 1;
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goto end;
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}
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}
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}
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end:
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av_freep(&ii);
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av_freep(&ii2);
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return ret;
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}
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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 62
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#define LIBAVFILTER_VERSION_MINOR 63
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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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551
libavfilter/vf_nlmeans.c
Normal file
551
libavfilter/vf_nlmeans.c
Normal file
@ -0,0 +1,551 @@
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/*
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* Copyright (c) 2016 Clément Bœsch <u pkh me>
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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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* @todo
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* - SIMD for compute_safe_ssd_integral_image
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* - SIMD for final weighted averaging
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* - better automatic defaults? see "Parameters" @ http://www.ipol.im/pub/art/2011/bcm_nlm/
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* - temporal support (probably doesn't need any displacement according to
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* "Denoising image sequences does not require motion estimation")
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* - Bayer pixel format support for at least raw photos? (DNG support would be
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* handy here)
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* - FATE test (probably needs visual threshold test mechanism due to the use
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* of floats)
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*/
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#include "libavutil/avassert.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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struct weighted_avg {
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double total_weight;
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double sum;
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};
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#define WEIGHT_LUT_NBITS 9
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#define WEIGHT_LUT_SIZE (1<<WEIGHT_LUT_NBITS)
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typedef struct {
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const AVClass *class;
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int nb_planes;
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int chroma_w, chroma_h;
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double pdiff_scale; // invert of the filtering parameter (sigma*10) squared
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double sigma; // denoising strength
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int patch_size, patch_hsize; // patch size and half size
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int patch_size_uv, patch_hsize_uv; // patch size and half size for chroma planes
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int research_size, research_hsize; // research size and half size
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int research_size_uv, research_hsize_uv; // research size and half size for chroma planes
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uint32_t *ii_orig; // integral image
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uint32_t *ii; // integral image starting after the 0-line and 0-column
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int ii_w, ii_h; // width and height of the integral image
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int ii_lz_32; // linesize in 32-bit units of the integral image
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struct weighted_avg *wa; // weighted average of every pixel
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int wa_linesize; // linesize for wa in struct size unit
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double weight_lut[WEIGHT_LUT_SIZE]; // lookup table mapping (scaled) patch differences to their associated weights
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double pdiff_lut_scale; // scale factor for patch differences before looking into the LUT
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int max_meaningful_diff; // maximum difference considered (if the patch difference is too high we ignore the pixel)
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} NLMeansContext;
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#define OFFSET(x) offsetof(NLMeansContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption nlmeans_options[] = {
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{ "s", "denoising strength", OFFSET(sigma), AV_OPT_TYPE_DOUBLE, { .dbl = 1.0 }, 1.0, 30.0, FLAGS },
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{ "p", "patch size", OFFSET(patch_size), AV_OPT_TYPE_INT, { .i64 = 3*2+1 }, 0, 99, FLAGS },
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{ "pc", "patch size for chroma planes", OFFSET(patch_size_uv), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 99, FLAGS },
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{ "r", "research window", OFFSET(research_size), AV_OPT_TYPE_INT, { .i64 = 7*2+1 }, 0, 99, FLAGS },
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{ "rc", "research window for chroma planes", OFFSET(research_size_uv), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 99, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(nlmeans);
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
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AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUVJ411P,
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GBRP,
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AV_PIX_FMT_NONE
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};
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AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
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if (!fmts_list)
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return AVERROR(ENOMEM);
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return ff_set_common_formats(ctx, fmts_list);
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}
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/*
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* M is a discrete map where every entry contains the sum of all the entries
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* in the rectangle from the top-left origin of M to its coordinate. In the
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* following schema, "i" contains the sum of the whole map:
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*
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* M = +----------+-----------------+----+
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* | | | |
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* | | | |
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* | a| b| c|
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* +----------+-----------------+----+
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* | | | |
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* | | | |
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* | | X | |
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* | | | |
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* | d| e| f|
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* +----------+-----------------+----+
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* | | | |
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* | g| h| i|
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* +----------+-----------------+----+
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*
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* The sum of the X box can be calculated with:
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* X = e-d-b+a
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*
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* See https://en.wikipedia.org/wiki/Summed_area_table
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*
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* The compute*_ssd functions compute the integral image M where every entry
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* contains the sum of the squared difference of every corresponding pixels of
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* two input planes of the same size as M.
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*/
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static inline int get_integral_patch_value(const uint32_t *ii, int ii_lz_32, int x, int y, int p)
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{
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const int e = ii[(y + p ) * ii_lz_32 + (x + p )];
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const int d = ii[(y + p ) * ii_lz_32 + (x - p - 1)];
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const int b = ii[(y - p - 1) * ii_lz_32 + (x + p )];
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const int a = ii[(y - p - 1) * ii_lz_32 + (x - p - 1)];
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return e - d - b + a;
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}
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/**
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* Compute squared difference of the safe area (the zone where s1 and s2
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* overlap). It is likely the largest integral zone, so it is interesting to do
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* as little checks as possible; contrary to the unsafe version of this
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* function, we do not need any clipping here.
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*
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* The line above dst and the column to its left are always readable.
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*
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* This C version computes the SSD integral image using a scalar accumulator,
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* while for SIMD implementation it is likely more interesting to use the
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* two-loops algorithm variant.
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*/
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static void compute_safe_ssd_integral_image_c(uint32_t *dst, int dst_linesize_32,
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const uint8_t *s1, int linesize1,
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const uint8_t *s2, int linesize2,
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int w, int h)
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{
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int x, y;
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for (y = 0; y < h; y++) {
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uint32_t acc = dst[-1] - dst[-dst_linesize_32 - 1];
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for (x = 0; x < w; x++) {
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const int d = s1[x] - s2[x];
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acc += d * d;
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dst[x] = dst[-dst_linesize_32 + x] + acc;
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}
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s1 += linesize1;
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s2 += linesize2;
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dst += dst_linesize_32;
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}
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}
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/**
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* Compute squared difference of an unsafe area (the zone nor s1 nor s2 could
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* be readable).
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*
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* On the other hand, the line above dst and the column to its left are always
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* readable.
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*
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* There is little point in having this function SIMDified as it is likely too
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* complex and only handle small portions of the image.
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*
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* @param dst integral image
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* @param dst_linesize_32 integral image linesize (in 32-bit integers unit)
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* @param startx integral starting x position
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* @param starty integral starting y position
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* @param src source plane buffer
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* @param linesize source plane linesize
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* @param offx source offsetting in x
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* @param offy source offsetting in y
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* @paran r absolute maximum source offsetting
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* @param sw source width
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* @param sh source height
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* @param w width to compute
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* @param h height to compute
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*/
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static inline void compute_unsafe_ssd_integral_image(uint32_t *dst, int dst_linesize_32,
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int startx, int starty,
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const uint8_t *src, int linesize,
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int offx, int offy, int r, int sw, int sh,
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int w, int h)
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{
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int x, y;
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for (y = starty; y < starty + h; y++) {
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uint32_t acc = dst[y*dst_linesize_32 + startx - 1] - dst[(y-1)*dst_linesize_32 + startx - 1];
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const int s1y = av_clip(y - r, 0, sh - 1);
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const int s2y = av_clip(y - (r + offy), 0, sh - 1);
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for (x = startx; x < startx + w; x++) {
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const int s1x = av_clip(x - r, 0, sw - 1);
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const int s2x = av_clip(x - (r + offx), 0, sw - 1);
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const uint8_t v1 = src[s1y*linesize + s1x];
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const uint8_t v2 = src[s2y*linesize + s2x];
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const int d = v1 - v2;
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acc += d * d;
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dst[y*dst_linesize_32 + x] = dst[(y-1)*dst_linesize_32 + x] + acc;
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}
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}
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}
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/*
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* Compute the sum of squared difference integral image
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* http://www.ipol.im/pub/art/2014/57/
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* Integral Images for Block Matching - Gabriele Facciolo, Nicolas Limare, Enric Meinhardt-Llopis
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*
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* @param ii integral image of dimension (w+e*2) x (h+e*2) with
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* an additional zeroed top line and column already
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* "applied" to the pointer value
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* @param ii_linesize_32 integral image linesize (in 32-bit integers unit)
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* @param src source plane buffer
|
||||
* @param linesize source plane linesize
|
||||
* @param offx x-offsetting ranging in [-e;e]
|
||||
* @param offy y-offsetting ranging in [-e;e]
|
||||
* @param w source width
|
||||
* @param h source height
|
||||
* @param e research padding edge
|
||||
*/
|
||||
static void compute_ssd_integral_image(uint32_t *ii, int ii_linesize_32,
|
||||
const uint8_t *src, int linesize, int offx, int offy,
|
||||
int e, int w, int h)
|
||||
{
|
||||
// ii has a surrounding padding of thickness "e"
|
||||
const int ii_w = w + e*2;
|
||||
const int ii_h = h + e*2;
|
||||
|
||||
// we center the first source
|
||||
const int s1x = e;
|
||||
const int s1y = e;
|
||||
|
||||
// 2nd source is the frame with offsetting
|
||||
const int s2x = e + offx;
|
||||
const int s2y = e + offy;
|
||||
|
||||
// get the dimension of the overlapping rectangle where it is always safe
|
||||
// to compare the 2 sources pixels
|
||||
const int startx_safe = FFMAX(s1x, s2x);
|
||||
const int starty_safe = FFMAX(s1y, s2y);
|
||||
const int endx_safe = FFMIN(s1x + w, s2x + w);
|
||||
const int endy_safe = FFMIN(s1y + h, s2y + h);
|
||||
|
||||
// top part where only one of s1 and s2 is still readable, or none at all
|
||||
compute_unsafe_ssd_integral_image(ii, ii_linesize_32,
|
||||
0, 0,
|
||||
src, linesize,
|
||||
offx, offy, e, w, h,
|
||||
ii_w, starty_safe);
|
||||
|
||||
// fill the left column integral required to compute the central
|
||||
// overlapping one
|
||||
compute_unsafe_ssd_integral_image(ii, ii_linesize_32,
|
||||
0, starty_safe,
|
||||
src, linesize,
|
||||
offx, offy, e, w, h,
|
||||
startx_safe, endy_safe - starty_safe);
|
||||
|
||||
// main and safe part of the integral
|
||||
av_assert1(startx_safe - s1x >= 0); av_assert1(startx_safe - s1x < w);
|
||||
av_assert1(starty_safe - s1y >= 0); av_assert1(starty_safe - s1y < h);
|
||||
av_assert1(startx_safe - s2x >= 0); av_assert1(startx_safe - s2x < w);
|
||||
av_assert1(starty_safe - s2y >= 0); av_assert1(starty_safe - s2y < h);
|
||||
compute_safe_ssd_integral_image_c(ii + starty_safe*ii_linesize_32 + startx_safe, ii_linesize_32,
|
||||
src + (starty_safe - s1y) * linesize + (startx_safe - s1x), linesize,
|
||||
src + (starty_safe - s2y) * linesize + (startx_safe - s2x), linesize,
|
||||
endx_safe - startx_safe, endy_safe - starty_safe);
|
||||
|
||||
// right part of the integral
|
||||
compute_unsafe_ssd_integral_image(ii, ii_linesize_32,
|
||||
endx_safe, starty_safe,
|
||||
src, linesize,
|
||||
offx, offy, e, w, h,
|
||||
ii_w - endx_safe, endy_safe - starty_safe);
|
||||
|
||||
// bottom part where only one of s1 and s2 is still readable, or none at all
|
||||
compute_unsafe_ssd_integral_image(ii, ii_linesize_32,
|
||||
0, endy_safe,
|
||||
src, linesize,
|
||||
offx, offy, e, w, h,
|
||||
ii_w, ii_h - endy_safe);
|
||||
}
|
||||
|
||||
static int config_input(AVFilterLink *inlink)
|
||||
{
|
||||
AVFilterContext *ctx = inlink->dst;
|
||||
NLMeansContext *s = ctx->priv;
|
||||
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
|
||||
const int e = FFMAX(s->research_hsize, s->research_hsize_uv)
|
||||
+ FFMAX(s->patch_hsize, s->patch_hsize_uv);
|
||||
|
||||
s->chroma_w = FF_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
|
||||
s->chroma_h = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
|
||||
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
|
||||
|
||||
/* Allocate the integral image with extra edges of thickness "e"
|
||||
*
|
||||
* +_+-------------------------------+
|
||||
* |0|0000000000000000000000000000000|
|
||||
* +-x-------------------------------+
|
||||
* |0|\ ^ |
|
||||
* |0| ii | e |
|
||||
* |0| v |
|
||||
* |0| +-----------------------+ |
|
||||
* |0| | | |
|
||||
* |0|<->| | |
|
||||
* |0| e | | |
|
||||
* |0| | | |
|
||||
* |0| +-----------------------+ |
|
||||
* |0| |
|
||||
* |0| |
|
||||
* |0| |
|
||||
* +-+-------------------------------+
|
||||
*/
|
||||
s->ii_w = inlink->w + e*2;
|
||||
s->ii_h = inlink->h + e*2;
|
||||
|
||||
// align to 4 the linesize, "+1" is for the space of the left 0-column
|
||||
s->ii_lz_32 = FFALIGN(s->ii_w + 1, 4);
|
||||
|
||||
// "+1" is for the space of the top 0-line
|
||||
s->ii_orig = av_mallocz_array(s->ii_h + 1, s->ii_lz_32 * sizeof(*s->ii_orig));
|
||||
if (!s->ii_orig)
|
||||
return AVERROR(ENOMEM);
|
||||
|
||||
// skip top 0-line and left 0-column
|
||||
s->ii = s->ii_orig + s->ii_lz_32 + 1;
|
||||
|
||||
// allocate weighted average for every pixel
|
||||
s->wa_linesize = inlink->w;
|
||||
s->wa = av_malloc_array(s->wa_linesize, inlink->h * sizeof(*s->wa));
|
||||
if (!s->wa)
|
||||
return AVERROR(ENOMEM);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct thread_data {
|
||||
const uint8_t *src;
|
||||
int src_linesize;
|
||||
int startx, starty;
|
||||
int endx, endy;
|
||||
const uint32_t *ii_start;
|
||||
int p;
|
||||
};
|
||||
|
||||
static int nlmeans_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
|
||||
{
|
||||
int x, y;
|
||||
NLMeansContext *s = ctx->priv;
|
||||
const struct thread_data *td = arg;
|
||||
const uint8_t *src = td->src;
|
||||
const int src_linesize = td->src_linesize;
|
||||
const int process_h = td->endy - td->starty;
|
||||
const int slice_start = (process_h * jobnr ) / nb_jobs;
|
||||
const int slice_end = (process_h * (jobnr+1)) / nb_jobs;
|
||||
const int starty = td->starty + slice_start;
|
||||
const int endy = td->starty + slice_end;
|
||||
|
||||
for (y = starty; y < endy; y++) {
|
||||
for (x = td->startx; x < td->endx; x++) {
|
||||
const int patch_diff_sq = get_integral_patch_value(td->ii_start, s->ii_lz_32, x, y, td->p);
|
||||
if (patch_diff_sq < s->max_meaningful_diff) {
|
||||
struct weighted_avg *wa = &s->wa[y*s->wa_linesize + x];
|
||||
const int weight_lut_idx = patch_diff_sq * s->pdiff_lut_scale;
|
||||
const double weight = s->weight_lut[weight_lut_idx]; // exp(-patch_diff_sq * s->pdiff_scale)
|
||||
wa->total_weight += weight;
|
||||
wa->sum += weight * src[y*src_linesize + x];
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nlmeans_plane(AVFilterContext *ctx, int w, int h, int p, int r,
|
||||
uint8_t *dst, int dst_linesize,
|
||||
const uint8_t *src, int src_linesize)
|
||||
{
|
||||
int x, y;
|
||||
int offx, offy;
|
||||
NLMeansContext *s = ctx->priv;
|
||||
/* patches center points cover the whole research window so the patches
|
||||
* themselves overflow the research window */
|
||||
const int e = r + p;
|
||||
/* focus an integral pointer on the centered image (s1) */
|
||||
const uint32_t *centered_ii = s->ii + e*s->ii_lz_32 + e;
|
||||
|
||||
memset(s->wa, 0, s->wa_linesize * h * sizeof(*s->wa));
|
||||
|
||||
for (offy = -r; offy <= r; offy++) {
|
||||
for (offx = -r; offx <= r; offx++) {
|
||||
if (offx || offy) {
|
||||
struct thread_data td = {
|
||||
.src = src + offy*src_linesize + offx,
|
||||
.src_linesize = src_linesize,
|
||||
.startx = FFMAX(0, -offx),
|
||||
.starty = FFMAX(0, -offy),
|
||||
.endx = FFMIN(w, w - offx),
|
||||
.endy = FFMIN(h, h - offy),
|
||||
.ii_start = centered_ii + offy*s->ii_lz_32 + offx,
|
||||
.p = p,
|
||||
};
|
||||
|
||||
compute_ssd_integral_image(s->ii, s->ii_lz_32,
|
||||
src, src_linesize,
|
||||
offx, offy, e, w, h);
|
||||
ctx->internal->execute(ctx, nlmeans_slice, &td, NULL,
|
||||
FFMIN(td.endy - td.starty, ff_filter_get_nb_threads(ctx)));
|
||||
}
|
||||
}
|
||||
}
|
||||
for (y = 0; y < h; y++) {
|
||||
for (x = 0; x < w; x++) {
|
||||
struct weighted_avg *wa = &s->wa[y*s->wa_linesize + x];
|
||||
|
||||
// Also weight the centered pixel
|
||||
wa->total_weight += 1.0;
|
||||
wa->sum += 1.0 * src[y*src_linesize + x];
|
||||
|
||||
dst[y*dst_linesize + x] = av_clip_uint8(wa->sum / wa->total_weight);
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
|
||||
{
|
||||
int i;
|
||||
AVFilterContext *ctx = inlink->dst;
|
||||
NLMeansContext *s = ctx->priv;
|
||||
AVFilterLink *outlink = ctx->outputs[0];
|
||||
|
||||
AVFrame *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 (i = 0; i < s->nb_planes; i++) {
|
||||
const int w = i ? s->chroma_w : inlink->w;
|
||||
const int h = i ? s->chroma_h : inlink->h;
|
||||
const int p = i ? s->patch_hsize_uv : s->patch_hsize;
|
||||
const int r = i ? s->research_hsize_uv : s->research_hsize;
|
||||
nlmeans_plane(ctx, w, h, p, r,
|
||||
out->data[i], out->linesize[i],
|
||||
in->data[i], in->linesize[i]);
|
||||
}
|
||||
|
||||
av_frame_free(&in);
|
||||
return ff_filter_frame(outlink, out);
|
||||
}
|
||||
|
||||
#define CHECK_ODD_FIELD(field, name) do { \
|
||||
if (!(s->field & 1)) { \
|
||||
s->field |= 1; \
|
||||
av_log(ctx, AV_LOG_WARNING, name " size must be odd, " \
|
||||
"setting it to %d\n", s->field); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
static av_cold int init(AVFilterContext *ctx)
|
||||
{
|
||||
int i;
|
||||
NLMeansContext *s = ctx->priv;
|
||||
const double h = s->sigma * 10.;
|
||||
|
||||
s->pdiff_scale = 1. / (h * h);
|
||||
s->max_meaningful_diff = -log(1/255.) / s->pdiff_scale;
|
||||
s->pdiff_lut_scale = 1./s->max_meaningful_diff * WEIGHT_LUT_SIZE;
|
||||
av_assert0((s->max_meaningful_diff - 1) * s->pdiff_lut_scale < FF_ARRAY_ELEMS(s->weight_lut));
|
||||
for (i = 0; i < WEIGHT_LUT_SIZE; i++)
|
||||
s->weight_lut[i] = exp(-i / s->pdiff_lut_scale * s->pdiff_scale);
|
||||
|
||||
CHECK_ODD_FIELD(research_size, "Luma research window");
|
||||
CHECK_ODD_FIELD(patch_size, "Luma patch");
|
||||
|
||||
if (!s->research_size_uv) s->research_size_uv = s->research_size;
|
||||
if (!s->patch_size_uv) s->patch_size_uv = s->patch_size;
|
||||
|
||||
CHECK_ODD_FIELD(research_size_uv, "Chroma research window");
|
||||
CHECK_ODD_FIELD(patch_size_uv, "Chroma patch");
|
||||
|
||||
s->research_hsize = s->research_size / 2;
|
||||
s->research_hsize_uv = s->research_size_uv / 2;
|
||||
s->patch_hsize = s->patch_size / 2;
|
||||
s->patch_hsize_uv = s->patch_size_uv / 2;
|
||||
|
||||
av_log(ctx, AV_LOG_INFO, "Research window: %dx%d / %dx%d, patch size: %dx%d / %dx%d\n",
|
||||
s->research_size, s->research_size, s->research_size_uv, s->research_size_uv,
|
||||
s->patch_size, s->patch_size, s->patch_size_uv, s->patch_size_uv);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static av_cold void uninit(AVFilterContext *ctx)
|
||||
{
|
||||
NLMeansContext *s = ctx->priv;
|
||||
av_freep(&s->ii_orig);
|
||||
av_freep(&s->wa);
|
||||
}
|
||||
|
||||
static const AVFilterPad nlmeans_inputs[] = {
|
||||
{
|
||||
.name = "default",
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.config_props = config_input,
|
||||
.filter_frame = filter_frame,
|
||||
},
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
static const AVFilterPad nlmeans_outputs[] = {
|
||||
{
|
||||
.name = "default",
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
},
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
AVFilter ff_vf_nlmeans = {
|
||||
.name = "nlmeans",
|
||||
.description = NULL_IF_CONFIG_SMALL("Non-local means denoiser."),
|
||||
.priv_size = sizeof(NLMeansContext),
|
||||
.init = init,
|
||||
.uninit = uninit,
|
||||
.query_formats = query_formats,
|
||||
.inputs = nlmeans_inputs,
|
||||
.outputs = nlmeans_outputs,
|
||||
.priv_class = &nlmeans_class,
|
||||
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
|
||||
};
|
||||
Loading…
Reference in New Issue
Block a user