mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
592 lines
23 KiB
C
592 lines
23 KiB
C
/*
|
|
* Copyright (c) 2016 Clément Bœsch <u pkh me>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @todo
|
|
* - better automatic defaults? see "Parameters" @ http://www.ipol.im/pub/art/2011/bcm_nlm/
|
|
* - temporal support (probably doesn't need any displacement according to
|
|
* "Denoising image sequences does not require motion estimation")
|
|
* - Bayer pixel format support for at least raw photos? (DNG support would be
|
|
* handy here)
|
|
* - FATE test (probably needs visual threshold test mechanism due to the use
|
|
* of floats)
|
|
*/
|
|
|
|
#include "libavutil/avassert.h"
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/pixdesc.h"
|
|
#include "avfilter.h"
|
|
#include "formats.h"
|
|
#include "internal.h"
|
|
#include "vf_nlmeans.h"
|
|
#include "video.h"
|
|
|
|
struct weighted_avg {
|
|
float total_weight;
|
|
float sum;
|
|
};
|
|
|
|
typedef struct NLMeansContext {
|
|
const AVClass *class;
|
|
int nb_planes;
|
|
int chroma_w, chroma_h;
|
|
double pdiff_scale; // invert of the filtering parameter (sigma*10) squared
|
|
double sigma; // denoising strength
|
|
int patch_size, patch_hsize; // patch size and half size
|
|
int patch_size_uv, patch_hsize_uv; // patch size and half size for chroma planes
|
|
int research_size, research_hsize; // research size and half size
|
|
int research_size_uv, research_hsize_uv; // research size and half size for chroma planes
|
|
uint32_t *ii_orig; // integral image
|
|
uint32_t *ii; // integral image starting after the 0-line and 0-column
|
|
int ii_w, ii_h; // width and height of the integral image
|
|
ptrdiff_t ii_lz_32; // linesize in 32-bit units of the integral image
|
|
struct weighted_avg *wa; // weighted average of every pixel
|
|
ptrdiff_t wa_linesize; // linesize for wa in struct size unit
|
|
float *weight_lut; // lookup table mapping (scaled) patch differences to their associated weights
|
|
uint32_t max_meaningful_diff; // maximum difference considered (if the patch difference is too high we ignore the pixel)
|
|
NLMeansDSPContext dsp;
|
|
} NLMeansContext;
|
|
|
|
#define OFFSET(x) offsetof(NLMeansContext, x)
|
|
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
|
|
static const AVOption nlmeans_options[] = {
|
|
{ "s", "denoising strength", OFFSET(sigma), AV_OPT_TYPE_DOUBLE, { .dbl = 1.0 }, 1.0, 30.0, FLAGS },
|
|
{ "p", "patch size", OFFSET(patch_size), AV_OPT_TYPE_INT, { .i64 = 3*2+1 }, 0, 99, FLAGS },
|
|
{ "pc", "patch size for chroma planes", OFFSET(patch_size_uv), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 99, FLAGS },
|
|
{ "r", "research window", OFFSET(research_size), AV_OPT_TYPE_INT, { .i64 = 7*2+1 }, 0, 99, FLAGS },
|
|
{ "rc", "research window for chroma planes", OFFSET(research_size_uv), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 99, FLAGS },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(nlmeans);
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
static const enum AVPixelFormat pix_fmts[] = {
|
|
AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
|
|
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
|
|
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
|
|
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
|
|
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
|
|
AV_PIX_FMT_YUVJ411P,
|
|
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GBRP,
|
|
AV_PIX_FMT_NONE
|
|
};
|
|
|
|
AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
|
|
if (!fmts_list)
|
|
return AVERROR(ENOMEM);
|
|
return ff_set_common_formats(ctx, fmts_list);
|
|
}
|
|
|
|
/**
|
|
* Compute squared difference of the safe area (the zone where s1 and s2
|
|
* overlap). It is likely the largest integral zone, so it is interesting to do
|
|
* as little checks as possible; contrary to the unsafe version of this
|
|
* function, we do not need any clipping here.
|
|
*
|
|
* The line above dst and the column to its left are always readable.
|
|
*/
|
|
static void compute_safe_ssd_integral_image_c(uint32_t *dst, ptrdiff_t dst_linesize_32,
|
|
const uint8_t *s1, ptrdiff_t linesize1,
|
|
const uint8_t *s2, ptrdiff_t linesize2,
|
|
int w, int h)
|
|
{
|
|
int x, y;
|
|
const uint32_t *dst_top = dst - dst_linesize_32;
|
|
|
|
/* SIMD-friendly assumptions allowed here */
|
|
av_assert2(!(w & 0xf) && w >= 16 && h >= 1);
|
|
|
|
for (y = 0; y < h; y++) {
|
|
for (x = 0; x < w; x += 4) {
|
|
const int d0 = s1[x ] - s2[x ];
|
|
const int d1 = s1[x + 1] - s2[x + 1];
|
|
const int d2 = s1[x + 2] - s2[x + 2];
|
|
const int d3 = s1[x + 3] - s2[x + 3];
|
|
|
|
dst[x ] = dst_top[x ] - dst_top[x - 1] + d0*d0;
|
|
dst[x + 1] = dst_top[x + 1] - dst_top[x ] + d1*d1;
|
|
dst[x + 2] = dst_top[x + 2] - dst_top[x + 1] + d2*d2;
|
|
dst[x + 3] = dst_top[x + 3] - dst_top[x + 2] + d3*d3;
|
|
|
|
dst[x ] += dst[x - 1];
|
|
dst[x + 1] += dst[x ];
|
|
dst[x + 2] += dst[x + 1];
|
|
dst[x + 3] += dst[x + 2];
|
|
}
|
|
s1 += linesize1;
|
|
s2 += linesize2;
|
|
dst += dst_linesize_32;
|
|
dst_top += dst_linesize_32;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Compute squared difference of an unsafe area (the zone nor s1 nor s2 could
|
|
* be readable).
|
|
*
|
|
* On the other hand, the line above dst and the column to its left are always
|
|
* readable.
|
|
*
|
|
* There is little point in having this function SIMDified as it is likely too
|
|
* complex and only handle small portions of the image.
|
|
*
|
|
* @param dst integral image
|
|
* @param dst_linesize_32 integral image linesize (in 32-bit integers unit)
|
|
* @param startx integral starting x position
|
|
* @param starty integral starting y position
|
|
* @param src source plane buffer
|
|
* @param linesize source plane linesize
|
|
* @param offx source offsetting in x
|
|
* @param offy source offsetting in y
|
|
* @paran r absolute maximum source offsetting
|
|
* @param sw source width
|
|
* @param sh source height
|
|
* @param w width to compute
|
|
* @param h height to compute
|
|
*/
|
|
static inline void compute_unsafe_ssd_integral_image(uint32_t *dst, ptrdiff_t dst_linesize_32,
|
|
int startx, int starty,
|
|
const uint8_t *src, ptrdiff_t linesize,
|
|
int offx, int offy, int r, int sw, int sh,
|
|
int w, int h)
|
|
{
|
|
int x, y;
|
|
|
|
for (y = starty; y < starty + h; y++) {
|
|
uint32_t acc = dst[y*dst_linesize_32 + startx - 1] - dst[(y-1)*dst_linesize_32 + startx - 1];
|
|
const int s1y = av_clip(y - r, 0, sh - 1);
|
|
const int s2y = av_clip(y - (r + offy), 0, sh - 1);
|
|
|
|
for (x = startx; x < startx + w; x++) {
|
|
const int s1x = av_clip(x - r, 0, sw - 1);
|
|
const int s2x = av_clip(x - (r + offx), 0, sw - 1);
|
|
const uint8_t v1 = src[s1y*linesize + s1x];
|
|
const uint8_t v2 = src[s2y*linesize + s2x];
|
|
const int d = v1 - v2;
|
|
acc += d * d;
|
|
dst[y*dst_linesize_32 + x] = dst[(y-1)*dst_linesize_32 + x] + acc;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Compute the sum of squared difference integral image
|
|
* http://www.ipol.im/pub/art/2014/57/
|
|
* Integral Images for Block Matching - Gabriele Facciolo, Nicolas Limare, Enric Meinhardt-Llopis
|
|
*
|
|
* @param ii integral image of dimension (w+e*2) x (h+e*2) with
|
|
* an additional zeroed top line and column already
|
|
* "applied" to the pointer value
|
|
* @param ii_linesize_32 integral image linesize (in 32-bit integers unit)
|
|
* @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(const NLMeansDSPContext *dsp,
|
|
uint32_t *ii, ptrdiff_t ii_linesize_32,
|
|
const uint8_t *src, ptrdiff_t 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 u_endx_safe = FFMIN(s1x + w, s2x + w); // unaligned
|
|
const int endy_safe = FFMIN(s1y + h, s2y + h);
|
|
|
|
// deduce the safe area width and height
|
|
const int safe_pw = (u_endx_safe - startx_safe) & ~0xf;
|
|
const int safe_ph = endy_safe - starty_safe;
|
|
|
|
// adjusted end x position of the safe area after width of the safe area gets aligned
|
|
const int endx_safe = startx_safe + safe_pw;
|
|
|
|
// 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, safe_ph);
|
|
|
|
// 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);
|
|
if (safe_pw && safe_ph)
|
|
dsp->compute_safe_ssd_integral_image(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,
|
|
safe_pw, safe_ph);
|
|
|
|
// 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, safe_ph);
|
|
|
|
// 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 = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
|
|
s->chroma_h = AV_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;
|
|
ptrdiff_t 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 ptrdiff_t 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;
|
|
const int p = td->p;
|
|
const uint32_t *ii = td->ii_start + (starty - p - 1) * s->ii_lz_32 - p - 1;
|
|
const int dist_b = 2*p + 1;
|
|
const int dist_d = dist_b * s->ii_lz_32;
|
|
const int dist_e = dist_d + dist_b;
|
|
|
|
for (y = starty; y < endy; y++) {
|
|
const uint8_t *src = td->src + y*src_linesize;
|
|
struct weighted_avg *wa = s->wa + y*s->wa_linesize;
|
|
for (x = td->startx; x < td->endx; x++) {
|
|
/*
|
|
* M is a discrete map where every entry contains the sum of all the entries
|
|
* in the rectangle from the top-left origin of M to its coordinate. In the
|
|
* following schema, "i" contains the sum of the whole map:
|
|
*
|
|
* M = +----------+-----------------+----+
|
|
* | | | |
|
|
* | | | |
|
|
* | a| b| c|
|
|
* +----------+-----------------+----+
|
|
* | | | |
|
|
* | | | |
|
|
* | | X | |
|
|
* | | | |
|
|
* | d| e| f|
|
|
* +----------+-----------------+----+
|
|
* | | | |
|
|
* | g| h| i|
|
|
* +----------+-----------------+----+
|
|
*
|
|
* The sum of the X box can be calculated with:
|
|
* X = e-d-b+a
|
|
*
|
|
* See https://en.wikipedia.org/wiki/Summed_area_table
|
|
*
|
|
* The compute*_ssd functions compute the integral image M where every entry
|
|
* contains the sum of the squared difference of every corresponding pixels of
|
|
* two input planes of the same size as M.
|
|
*/
|
|
const uint32_t a = ii[x];
|
|
const uint32_t b = ii[x + dist_b];
|
|
const uint32_t d = ii[x + dist_d];
|
|
const uint32_t e = ii[x + dist_e];
|
|
const uint32_t patch_diff_sq = e - d - b + a;
|
|
|
|
if (patch_diff_sq < s->max_meaningful_diff) {
|
|
const float weight = s->weight_lut[patch_diff_sq]; // exp(-patch_diff_sq * s->pdiff_scale)
|
|
wa[x].total_weight += weight;
|
|
wa[x].sum += weight * src[x];
|
|
}
|
|
}
|
|
ii += s->ii_lz_32;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void weight_averages(uint8_t *dst, ptrdiff_t dst_linesize,
|
|
const uint8_t *src, ptrdiff_t src_linesize,
|
|
struct weighted_avg *wa, ptrdiff_t wa_linesize,
|
|
int w, int h)
|
|
{
|
|
int x, y;
|
|
|
|
for (y = 0; y < h; y++) {
|
|
for (x = 0; x < w; x++) {
|
|
// Also weight the centered pixel
|
|
wa[x].total_weight += 1.f;
|
|
wa[x].sum += 1.f * src[x];
|
|
dst[x] = av_clip_uint8(wa[x].sum / wa[x].total_weight);
|
|
}
|
|
dst += dst_linesize;
|
|
src += src_linesize;
|
|
wa += wa_linesize;
|
|
}
|
|
}
|
|
|
|
static int nlmeans_plane(AVFilterContext *ctx, int w, int h, int p, int r,
|
|
uint8_t *dst, ptrdiff_t dst_linesize,
|
|
const uint8_t *src, ptrdiff_t src_linesize)
|
|
{
|
|
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->dsp, 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)));
|
|
}
|
|
}
|
|
}
|
|
|
|
weight_averages(dst, dst_linesize, src, src_linesize,
|
|
s->wa, s->wa_linesize, w, h);
|
|
|
|
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)
|
|
|
|
void ff_nlmeans_init(NLMeansDSPContext *dsp)
|
|
{
|
|
dsp->compute_safe_ssd_integral_image = compute_safe_ssd_integral_image_c;
|
|
|
|
if (ARCH_AARCH64)
|
|
ff_nlmeans_init_aarch64(dsp);
|
|
}
|
|
|
|
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(255.) / s->pdiff_scale;
|
|
s->weight_lut = av_calloc(s->max_meaningful_diff, sizeof(*s->weight_lut));
|
|
if (!s->weight_lut)
|
|
return AVERROR(ENOMEM);
|
|
for (i = 0; i < s->max_meaningful_diff; i++)
|
|
s->weight_lut[i] = exp(-i * 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);
|
|
|
|
ff_nlmeans_init(&s->dsp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
NLMeansContext *s = ctx->priv;
|
|
av_freep(&s->weight_lut);
|
|
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,
|
|
};
|