FFmpeg
Data Structures | Macros | Enumerations | Functions | Variables
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 query_formats (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 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

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 620 of file vf_dctdnoiz.c.

◆ query_formats()

static int query_formats ( AVFilterContext ctx)
static

Definition at line 654 of file vf_dctdnoiz.c.

◆ filter_slice()

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

Definition at line 671 of file vf_dctdnoiz.c.

Referenced by filter_frame().

◆ filter_frame()

static int filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 719 of file vf_dctdnoiz.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 790 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.

◆ dctdnoiz_inputs

const AVFilterPad dctdnoiz_inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = filter_frame,
.config_props = config_input,
},
{ NULL }
}

Definition at line 807 of file vf_dctdnoiz.c.

◆ dctdnoiz_outputs

const AVFilterPad dctdnoiz_outputs[]
static
Initial value:
= {
{
.name = "default",
},
{ NULL }
}

Definition at line 817 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,
.priv_class = &dctdnoiz_class,
}

Definition at line 825 of file vf_dctdnoiz.c.

DCTdnoizContext
Definition: vf_dctdnoiz.c:42
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
r
const char * r
Definition: vf_curves.c:116
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_dctdnoiz.c:620
FLAGS
#define FLAGS
Definition: vf_dctdnoiz.c:79
OFFSET
#define OFFSET(x)
Definition: vf_dctdnoiz.c:78
DEFAULT_NBITS
#define DEFAULT_NBITS
Definition: vf_dctdnoiz.c:76
w
uint8_t w
Definition: llviddspenc.c:39
b
#define b
Definition: input.c:41
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_dctdnoiz.c:790
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_dctdnoiz.c:533
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_dctdnoiz.c:654
dctdnoiz_outputs
static const AVFilterPad dctdnoiz_outputs[]
Definition: vf_dctdnoiz.c:817
inputs
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:243
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_dctdnoiz.c:719
g
const char * g
Definition: vf_curves.c:117
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
NULL
#define NULL
Definition: coverity.c:32
src
#define src
Definition: vp8dsp.c:255
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
MAX_NBITS
#define MAX_NBITS
Definition: vf_dctdnoiz.c:75
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:126
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:228
dctdnoiz_inputs
static const AVFilterPad dctdnoiz_inputs[]
Definition: vf_dctdnoiz.c:807
MIN_NBITS
#define MIN_NBITS
Definition: vf_dctdnoiz.c:74
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
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:117
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
h
h
Definition: vp9dsp_template.c:2038
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229