vf_dctdnoiz.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/eval.h"
#include "libavutil/mem_internal.h"
#include "libavutil/opt.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	DCTdnoizContext
struct	ThreadData
	Used for passing data between threads. More...

Macros
#define	MAX_THREADS   8
#define	MIN_NBITS   3 /* blocksize = 1<<3 = 8 */
#define	MAX_NBITS   4 /* blocksize = 1<<4 = 16 */
#define	DEFAULT_NBITS   3
#define	OFFSET(x)   offsetof(DCTdnoizContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	DEF_FILTER_FREQ_FUNCS(bsize)
#define	DCT3X3_0_0   0.5773502691896258f /* 1/sqrt(3) */
#define	DCT3X3_0_1   0.5773502691896258f /* 1/sqrt(3) */
#define	DCT3X3_0_2   0.5773502691896258f /* 1/sqrt(3) */
#define	DCT3X3_1_0   0.7071067811865475f /* 1/sqrt(2) */
#define	DCT3X3_1_2   -0.7071067811865475f /* -1/sqrt(2) */
#define	DCT3X3_2_0   0.4082482904638631f /* 1/sqrt(6) */
#define	DCT3X3_2_1   -0.8164965809277261f /* -2/sqrt(6) */
#define	DCT3X3_2_2   0.4082482904638631f /* 1/sqrt(6) */
#define	DECLARE_COLOR_FUNCS(name, r, g, b)

Enumerations
enum	{ VAR_C, VAR_VARS_NB }

Functions
	AVFILTER_DEFINE_CLASS (dctdnoiz)
static void av_always_inline	fdct8_1d (float *dst, const float *src, int dst_stridea, int dst_strideb, int src_stridea, int src_strideb)
static void av_always_inline	idct8_1d (float *dst, const float *src, int dst_stridea, int dst_strideb, int src_stridea, int src_strideb, int add)
static void av_always_inline	fdct16_1d (float *dst, const float *src, int dst_stridea, int dst_strideb, int src_stridea, int src_strideb)
static void av_always_inline	idct16_1d (float *dst, const float *src, int dst_stridea, int dst_strideb, int src_stridea, int src_strideb, int add)
static av_always_inline void	color_decorrelation (float **dst, int dst_linesize, const uint8_t **src, int src_linesize, int w, int h, int r, int g, int b)
static av_always_inline void	color_correlation (uint8_t **dst, int dst_linesize, float **src, int src_linesize, int w, int h, int r, int g, int b)
static av_always_inline void	color_decorrelation_gbrp (float **dst, int dst_linesize, const uint8_t **src, int src_linesize, int w, int h)
static av_always_inline void	color_correlation_gbrp (uint8_t **dst, int dst_linesize, float **src, int src_linesize, int w, int h)
static int	config_input (AVFilterLink *inlink)
static av_cold int	init (AVFilterContext *ctx)
static int	filter_slice (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const char *const	var_names [] = { "c", NULL }
	A simple, relatively efficient and slow DCT image denoiser. More...
static const AVOption	dctdnoiz_options []
static enum AVPixelFormat	pix_fmts []
static const AVFilterPad	dctdnoiz_inputs []
static const AVFilterPad	dctdnoiz_outputs []
const AVFilter	ff_vf_dctdnoiz

Macro Definition Documentation

MAX_THREADS

#define MAX_THREADS   8

Definition at line 40 of file vf_dctdnoiz.c.

MIN_NBITS

#define MIN_NBITS   3 /* blocksize = 1<<3 = 8 */

Definition at line 74 of file vf_dctdnoiz.c.

MAX_NBITS

#define MAX_NBITS   4 /* blocksize = 1<<4 = 16 */

Definition at line 75 of file vf_dctdnoiz.c.

DEFAULT_NBITS

#define DEFAULT_NBITS   3

Definition at line 76 of file vf_dctdnoiz.c.

OFFSET

#define OFFSET

(

x

)

offsetof(DCTdnoizContext, x)

Definition at line 78 of file vf_dctdnoiz.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 79 of file vf_dctdnoiz.c.

DEF_FILTER_FREQ_FUNCS

#define DEF_FILTER_FREQ_FUNCS

(

bsize

)

Definition at line 353 of file vf_dctdnoiz.c.

DCT3X3_0_0

#define DCT3X3_0_0   0.5773502691896258f /* 1/sqrt(3) */

Definition at line 402 of file vf_dctdnoiz.c.

DCT3X3_0_1

#define DCT3X3_0_1   0.5773502691896258f /* 1/sqrt(3) */

Definition at line 403 of file vf_dctdnoiz.c.

DCT3X3_0_2

#define DCT3X3_0_2   0.5773502691896258f /* 1/sqrt(3) */

Definition at line 404 of file vf_dctdnoiz.c.

DCT3X3_1_0

#define DCT3X3_1_0   0.7071067811865475f /* 1/sqrt(2) */

Definition at line 405 of file vf_dctdnoiz.c.

DCT3X3_1_2

#define DCT3X3_1_2   -0.7071067811865475f /* -1/sqrt(2) */

Definition at line 406 of file vf_dctdnoiz.c.

DCT3X3_2_0

#define DCT3X3_2_0   0.4082482904638631f /* 1/sqrt(6) */

Definition at line 407 of file vf_dctdnoiz.c.

DCT3X3_2_1

#define DCT3X3_2_1   -0.8164965809277261f /* -2/sqrt(6) */

Definition at line 408 of file vf_dctdnoiz.c.

DCT3X3_2_2

#define DCT3X3_2_2   0.4082482904638631f /* 1/sqrt(6) */

Definition at line 409 of file vf_dctdnoiz.c.

DECLARE_COLOR_FUNCS

#define DECLARE_COLOR_FUNCS	(		name,
			r,
			g,
			b
	)

Value:

static void color_decorrelation_##name(float **dst, int dst_linesize,               \
                                       const uint8_t **src, int src_linesize,       \
                                       int w, int h)                                \
{                                                                                   \
    color_decorrelation(dst, dst_linesize, src, src_linesize, w, h, r, g, b);       \
}                                                                                   \
                                                                                    \
static void color_correlation_##name(uint8_t **dst, int dst_linesize,               \
                                     float **src, int src_linesize,                 \
                                     int w, int h)                                  \
{                                                                                   \
    color_correlation(dst, dst_linesize, src, src_linesize, w, h, r, g, b);         \
}

Definition at line 461 of file vf_dctdnoiz.c.

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
VAR_C
VAR_VARS_NB

Definition at line 38 of file vf_dctdnoiz.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

dctdnoiz

)

fdct8_1d()

static void av_always_inline fdct8_1d ( float *  dst, const float *  src, int  dst_stridea, int  dst_strideb, int  src_stridea, int  src_strideb  )

static

Definition at line 92 of file vf_dctdnoiz.c.

idct8_1d()

static void av_always_inline idct8_1d ( float *  dst, const float *  src, int  dst_stridea, int  dst_strideb, int  src_stridea, int  src_strideb, int  add  )

static

Definition at line 130 of file vf_dctdnoiz.c.

fdct16_1d()

static void av_always_inline fdct16_1d ( float *  dst, const float *  src, int  dst_stridea, int  dst_strideb, int  src_stridea, int  src_strideb  )

static

Definition at line 174 of file vf_dctdnoiz.c.

idct16_1d()

static void av_always_inline idct16_1d ( float *  dst, const float *  src, int  dst_stridea, int  dst_strideb, int  src_stridea, int  src_strideb, int  add  )

static

Definition at line 258 of file vf_dctdnoiz.c.

color_decorrelation()

static av_always_inline void color_decorrelation ( float **  dst, int  dst_linesize, const uint8_t **  src, int  src_linesize, int  w, int  h, int  r, int  g, int  b  )

static

Definition at line 411 of file vf_dctdnoiz.c.

color_correlation()

static av_always_inline void color_correlation ( uint8_t **  dst, int  dst_linesize, float **  src, int  src_linesize, int  w, int  h, int  r, int  g, int  b  )

static

Definition at line 436 of file vf_dctdnoiz.c.

color_decorrelation_gbrp()

static av_always_inline void color_decorrelation_gbrp ( float **  dst, int  dst_linesize, const uint8_t **  src, int  src_linesize, int  w, int  h  )

static

Definition at line 479 of file vf_dctdnoiz.c.

Referenced by config_input().

color_correlation_gbrp()

static av_always_inline void color_correlation_gbrp ( uint8_t **  dst, int  dst_linesize, float **  src, int  src_linesize, int  w, int  h  )

static

Definition at line 506 of file vf_dctdnoiz.c.

Referenced by config_input().

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 533 of file vf_dctdnoiz.c.

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 623 of file vf_dctdnoiz.c.

filter_slice()

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

static

Definition at line 667 of file vf_dctdnoiz.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 715 of file vf_dctdnoiz.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 786 of file vf_dctdnoiz.c.

Variable Documentation

var_names

const char* const var_names[] = { "c", NULL }

static

A simple, relatively efficient and slow DCT image denoiser.

See also

http://www.ipol.im/pub/art/2011/ys-dct/

The DCT factorization used is based on "Fast and numerically stable algorithms for discrete cosine transforms" from Gerlind Plonkaa & Manfred Tasche (DOI: 10.1016/j.laa.2004.07.015).

Definition at line 37 of file vf_dctdnoiz.c.

Referenced by config_input().

dctdnoiz_options

const AVOption dctdnoiz_options[]

static

Initial value:

= {
    { "sigma",   "set noise sigma constant",               OFFSET(sigma),    AV_OPT_TYPE_FLOAT,  {.dbl=0},            0, 999,          .flags = FLAGS },
    { "s",       "set noise sigma constant",               OFFSET(sigma),    AV_OPT_TYPE_FLOAT,  {.dbl=0},            0, 999,          .flags = FLAGS },
    { "overlap", "set number of block overlapping pixels", OFFSET(overlap),  AV_OPT_TYPE_INT,    {.i64=-1}, -1, (1<<MAX_NBITS)-1, .flags = FLAGS },
    { "expr",    "set coefficient factor expression",      OFFSET(expr_str), AV_OPT_TYPE_STRING, {.str=NULL},                          .flags = FLAGS },
    { "e",       "set coefficient factor expression",      OFFSET(expr_str), AV_OPT_TYPE_STRING, {.str=NULL},                          .flags = FLAGS },
    { "n",       "set the block size, expressed in bits",  OFFSET(n),        AV_OPT_TYPE_INT,    {.i64=DEFAULT_NBITS}, MIN_NBITS, MAX_NBITS, .flags = FLAGS },
    { NULL }
}

Definition at line 80 of file vf_dctdnoiz.c.

pix_fmts

enum AVPixelFormat pix_fmts[]

static

Initial value:

= {
    AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB24,
    AV_PIX_FMT_GBRP,
    AV_PIX_FMT_NONE
}

Definition at line 657 of file vf_dctdnoiz.c.

dctdnoiz_inputs

const AVFilterPad dctdnoiz_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
        .config_props = config_input,
    },
}

Definition at line 803 of file vf_dctdnoiz.c.

dctdnoiz_outputs

const AVFilterPad dctdnoiz_outputs[]

static

Initial value:

= {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
    },
}

Definition at line 812 of file vf_dctdnoiz.c.

ff_vf_dctdnoiz

const AVFilter ff_vf_dctdnoiz

Initial value:

= {
    .name          = "dctdnoiz",
    .description   = NULL_IF_CONFIG_SMALL("Denoise frames using 2D DCT."),
    .priv_size     = sizeof(DCTdnoizContext),
    .init          = init,
    .uninit        = uninit,
    FILTER_INPUTS(dctdnoiz_inputs),
    FILTER_OUTPUTS(dctdnoiz_outputs),
    FILTER_PIXFMTS_ARRAY(pix_fmts),
    .priv_class    = &dctdnoiz_class,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
}

Definition at line 819 of file vf_dctdnoiz.c.