vf_dctdnoiz.c File Reference

#include "libavcodec/avfft.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "drawutils.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	DCTdnoizContext

Macros
#define	NBITS   4
	A simple, relatively efficient and extremely slow DCT image denoiser.
#define	BSIZE   (1<<(NBITS))
#define	OFFSET(x)   offsetof(DCTdnoizContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Enumerations
enum	{ VAR_C, VAR_VARS_NB }

Functions
	AVFILTER_DEFINE_CLASS (dctdnoiz)
static float *	dct_block (DCTdnoizContext *ctx, const float *src, int src_linesize)
static void	idct_block (DCTdnoizContext *ctx, float *dst, int dst_linesize)
static int	config_input (AVFilterLink *inlink)
static av_cold int	init (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static void	color_decorrelation (float dct3ch[3][3], float **dst, int dst_linesize, const uint8_t *src, int src_linesize, int w, int h)
static void	color_correlation (float dct3ch[3][3], uint8_t *dst, int dst_linesize, float **src, int src_linesize, int w, int h)
static void	filter_plane (AVFilterContext *ctx, float *dst, int dst_linesize, const float *src, int src_linesize, int w, int h)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const char *const	var_names [] = { "c", NULL }
static const AVOption	dctdnoiz_options []
static const AVFilterPad	dctdnoiz_inputs []
static const AVFilterPad	dctdnoiz_outputs []
AVFilter	ff_vf_dctdnoiz

Macro Definition Documentation

#define NBITS   4

A simple, relatively efficient and extremely slow DCT image denoiser.

See Also

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

Definition at line 32 of file vf_dctdnoiz.c.

Referenced by init().

#define BSIZE   (1<<(NBITS))

Definition at line 33 of file vf_dctdnoiz.c.

Referenced by config_input(), dct_block(), filter_plane(), idct_block(), and init().

#define OFFSET

(

x

)

offsetof(DCTdnoizContext, x)

Definition at line 59 of file vf_dctdnoiz.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 60 of file vf_dctdnoiz.c.

Enumeration Type Documentation

anonymous enum

Enumerator:

VAR_C
VAR_VARS_NB

Definition at line 36 of file vf_dctdnoiz.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

dctdnoiz

)

static float* dct_block ( DCTdnoizContext *  ctx, const float *  src, int  src_linesize  )

static

Definition at line 72 of file vf_dctdnoiz.c.

Referenced by filter_plane().

static void idct_block ( DCTdnoizContext *  ctx, float *  dst, int  dst_linesize  )

static

Definition at line 109 of file vf_dctdnoiz.c.

Referenced by filter_plane().

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 134 of file vf_dctdnoiz.c.

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 188 of file vf_dctdnoiz.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 212 of file vf_dctdnoiz.c.

static void color_decorrelation ( float  dct3ch[3][3], float **  dst, int  dst_linesize, const uint8_t *  src, int  src_linesize, int  w, int  h  )

static

Definition at line 222 of file vf_dctdnoiz.c.

Referenced by filter_frame().

static void color_correlation ( float  dct3ch[3][3], uint8_t *  dst, int  dst_linesize, float **  src, int  src_linesize, int  w, int  h  )

static

Definition at line 246 of file vf_dctdnoiz.c.

Referenced by filter_frame().

static void filter_plane ( AVFilterContext *  ctx, float *  dst, int  dst_linesize, const float *  src, int  src_linesize, int  w, int  h  )

static

Definition at line 270 of file vf_dctdnoiz.c.

Referenced by filter_frame().

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

static

Definition at line 320 of file vf_dctdnoiz.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 386 of file vf_dctdnoiz.c.

Variable Documentation

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

static

Definition at line 35 of file vf_dctdnoiz.c.

Referenced by init().

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<<NBITS)-1}, 0, (1<<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 },
    { NULL }
}

Definition at line 61 of file vf_dctdnoiz.c.

const AVFilterPad dctdnoiz_inputs[]

static

Initial value:

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

Definition at line 404 of file vf_dctdnoiz.c.

const AVFilterPad dctdnoiz_outputs[]

static

Initial value:

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

Definition at line 414 of file vf_dctdnoiz.c.

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,
    .query_formats = query_formats,
    .inputs        = dctdnoiz_inputs,
    .outputs       = dctdnoiz_outputs,
    .priv_class    = &dctdnoiz_class,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}

Definition at line 422 of file vf_dctdnoiz.c.