FFmpeg
Data Structures | Macros | Functions | Variables
vf_nlmeans.c File Reference
#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"

Go to the source code of this file.

Data Structures

struct  NLMeansContext
 
struct  thread_data
 

Macros

#define OFFSET(x)   offsetof(NLMeansContext, x)
 
#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
 
#define CHECK_ODD_FIELD(field, name)
 

Functions

 AVFILTER_DEFINE_CLASS (nlmeans)
 
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)
 Compute squared difference of the safe area (the zone where s1 and s2 overlap). More...
 
static 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)
 Compute squared difference of an unsafe area (the zone nor s1 nor s2 could be readable). More...
 
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)
 
static int config_input (AVFilterLink *inlink)
 
static void compute_weights_line_c (const uint32_t *const iia, const uint32_t *const iib, const uint32_t *const iid, const uint32_t *const iie, const uint8_t *const src, float *total_weight, float *sum, const float *const weight_lut, int max_meaningful_diff, int startx, int endx)
 
static int nlmeans_slice (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static void weight_averages (uint8_t *dst, ptrdiff_t dst_linesize, const uint8_t *src, ptrdiff_t src_linesize, float *total_weight, float *sum, ptrdiff_t linesize, int w, int h)
 
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)
 
static int filter_frame (AVFilterLink *inlink, AVFrame *in)
 
void ff_nlmeans_init (NLMeansDSPContext *dsp)
 
static av_cold int init (AVFilterContext *ctx)
 
static av_cold void uninit (AVFilterContext *ctx)
 

Variables

static const AVOption nlmeans_options []
 
static enum AVPixelFormat pix_fmts []
 
static const AVFilterPad nlmeans_inputs []
 
static const AVFilterPad nlmeans_outputs []
 
const AVFilter ff_vf_nlmeans
 

Macro Definition Documentation

◆ OFFSET

#define OFFSET (   x)    offsetof(NLMeansContext, x)

Definition at line 63 of file vf_nlmeans.c.

◆ FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 64 of file vf_nlmeans.c.

◆ CHECK_ODD_FIELD

#define CHECK_ODD_FIELD (   field,
  name 
)
Value:
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)

Definition at line 507 of file vf_nlmeans.c.

Function Documentation

◆ AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS ( nlmeans  )

◆ compute_safe_ssd_integral_image_c()

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 
)
static

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.

Definition at line 95 of file vf_nlmeans.c.

Referenced by ff_nlmeans_init().

◆ compute_unsafe_ssd_integral_image()

static 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 
)
inlinestatic

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.

Parameters
dstintegral image
dst_linesize_32integral image linesize (in 32-bit integers unit)
startxintegral starting x position
startyintegral starting y position
srcsource plane buffer
linesizesource plane linesize
offxsource offsetting in x
offysource offsetting in y @paran r absolute maximum source offsetting
swsource width
shsource height
wwidth to compute
hheight to compute

Definition at line 153 of file vf_nlmeans.c.

Referenced by compute_ssd_integral_image(), and main().

◆ compute_ssd_integral_image()

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 
)
static

Definition at line 193 of file vf_nlmeans.c.

Referenced by main(), and nlmeans_plane().

◆ config_input()

static int config_input ( AVFilterLink *  inlink)
static

Definition at line 265 of file vf_nlmeans.c.

◆ compute_weights_line_c()

static void compute_weights_line_c ( const uint32_t *const  iia,
const uint32_t *const  iib,
const uint32_t *const  iid,
const uint32_t *const  iie,
const uint8_t *const  src,
float *  total_weight,
float *  sum,
const float *const  weight_lut,
int  max_meaningful_diff,
int  startx,
int  endx 
)
static

Definition at line 329 of file vf_nlmeans.c.

Referenced by ff_nlmeans_init().

◆ nlmeans_slice()

static int nlmeans_slice ( AVFilterContext *  ctx,
void *  arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 382 of file vf_nlmeans.c.

Referenced by nlmeans_plane().

◆ weight_averages()

static void weight_averages ( uint8_t *  dst,
ptrdiff_t  dst_linesize,
const uint8_t *  src,
ptrdiff_t  src_linesize,
float *  total_weight,
float *  sum,
ptrdiff_t  linesize,
int  w,
int  h 
)
static

Definition at line 418 of file vf_nlmeans.c.

Referenced by nlmeans_plane().

◆ nlmeans_plane()

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 
)
static

Definition at line 437 of file vf_nlmeans.c.

Referenced by filter_frame().

◆ filter_frame()

static int filter_frame ( AVFilterLink *  inlink,
AVFrame *  in 
)
static

Definition at line 480 of file vf_nlmeans.c.

◆ ff_nlmeans_init()

void ff_nlmeans_init ( NLMeansDSPContext *  dsp)

Definition at line 515 of file vf_nlmeans.c.

Referenced by checkasm_check_nlmeans(), init(), and main().

◆ init()

static av_cold int init ( AVFilterContext *  ctx)
static

Definition at line 527 of file vf_nlmeans.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext *  ctx)
static

Definition at line 563 of file vf_nlmeans.c.

Variable Documentation

◆ nlmeans_options

const AVOption nlmeans_options[]
static
Initial value:
= {
{ "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 }
}

Definition at line 65 of file vf_nlmeans.c.

◆ pix_fmts

enum AVPixelFormat pix_fmts[]
static
Initial value:
= {
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
}

Definition at line 76 of file vf_nlmeans.c.

◆ nlmeans_inputs

const AVFilterPad nlmeans_inputs[]
static
Initial value:
= {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
.filter_frame = filter_frame,
},
}

Definition at line 572 of file vf_nlmeans.c.

◆ nlmeans_outputs

const AVFilterPad nlmeans_outputs[]
static
Initial value:
= {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
}

Definition at line 581 of file vf_nlmeans.c.

◆ ff_vf_nlmeans

const AVFilter ff_vf_nlmeans
Initial value:
= {
.name = "nlmeans",
.description = NULL_IF_CONFIG_SMALL("Non-local means denoiser."),
.priv_size = sizeof(NLMeansContext),
.init = init,
.uninit = uninit,
FILTER_INPUTS(nlmeans_inputs),
FILTER_OUTPUTS(nlmeans_outputs),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.priv_class = &nlmeans_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
}

Definition at line 588 of file vf_nlmeans.c.

AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: vf_nlmeans.c:76
FILTER_PIXFMTS_ARRAY
#define FILTER_PIXFMTS_ARRAY(array)
Definition: internal.h:171
AV_PIX_FMT_YUV440P
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
nlmeans_outputs
static const AVFilterPad nlmeans_outputs[]
Definition: vf_nlmeans.c:581
nlmeans_inputs
static const AVFilterPad nlmeans_inputs[]
Definition: vf_nlmeans.c:572
AV_PIX_FMT_YUVJ411P
@ AV_PIX_FMT_YUVJ411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:248
AV_PIX_FMT_YUVJ422P
@ AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
s
#define s(width, name)
Definition: cbs_vp9.c:257
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:226
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:191
AV_PIX_FMT_YUVJ444P
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
NULL
#define NULL
Definition: coverity.c:32
AV_PIX_FMT_YUVJ420P
@ AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
NLMeansContext
Definition: vf_nlmeans.c:41
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
FLAGS
#define FLAGS
Definition: vf_nlmeans.c:64
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_nlmeans.c:563
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_nlmeans.c:265
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:146
AV_PIX_FMT_YUVJ440P
@ AV_PIX_FMT_YUVJ440P
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range
Definition: pixfmt.h:100
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_nlmeans.c:527
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
AV_PIX_FMT_GBRP
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:158
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:121
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_nlmeans.c:480
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:192
AV_PIX_FMT_YUV411P
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
OFFSET
#define OFFSET(x)
Definition: vf_nlmeans.c:63
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