FFmpeg
Data Structures | Macros | Functions | Variables
af_adeclick.c File Reference
#include "libavutil/audio_fifo.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/tx.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"

Go to the source code of this file.

Data Structures

struct  DeclickChannel
 
struct  AudioDeclickContext
 
struct  ThreadData
 Used for passing data between threads. More...
 

Macros

#define OFFSET(x)   offsetof(AudioDeclickContext, x)
 
#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
 

Functions

 AVFILTER_DEFINE_CLASS (adeclick)
 
static int config_input (AVFilterLink *inlink)
 
static void autocorrelation (const double *input, int order, int size, double *output, double scale)
 
static double autoregression (const double *samples, int ar_order, int nb_samples, double *k, double *r, double *a)
 
static int isfinite_array (double *samples, int nb_samples)
 
static int find_index (int *index, int value, int size)
 
static int factorization (double *matrix, int n)
 
static int do_interpolation (DeclickChannel *c, double *matrix, double *vector, int n, double *out)
 
static int interpolation (DeclickChannel *c, const double *src, int ar_order, double *acoefficients, int *index, int nb_errors, double *auxiliary, double *interpolated)
 
static int detect_clips (AudioDeclickContext *s, DeclickChannel *c, double unused0, double *unused1, double *unused2, uint8_t *clip, int *index, const double *src, double *dst)
 
static int detect_clicks (AudioDeclickContext *s, DeclickChannel *c, double sigmae, double *detection, double *acoefficients, uint8_t *click, int *index, const double *src, double *dst)
 
static int filter_channel (AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
 
static int filter_frame (AVFilterLink *inlink)
 
static int activate (AVFilterContext *ctx)
 
static av_cold int init (AVFilterContext *ctx)
 
static av_cold void uninit (AVFilterContext *ctx)
 
 AVFILTER_DEFINE_CLASS (adeclip)
 

Variables

static const AVOption adeclick_options []
 
static const AVFilterPad inputs []
 
const FFFilter ff_af_adeclick
 
static const AVOption adeclip_options []
 
const FFFilter ff_af_adeclip
 

Macro Definition Documentation

◆ OFFSET

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

Definition at line 91 of file af_adeclick.c.

◆ AF

#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 92 of file af_adeclick.c.

Function Documentation

◆ AVFILTER_DEFINE_CLASS() [1/2]

AVFILTER_DEFINE_CLASS ( adeclick  )

◆ config_input()

static int config_input ( AVFilterLink *  inlink)
static

Definition at line 116 of file af_adeclick.c.

◆ autocorrelation()

static void autocorrelation ( const double *  input,
int  order,
int  size,
double *  output,
double  scale 
)
static

Definition at line 240 of file af_adeclick.c.

Referenced by autoregression(), and interpolation().

◆ autoregression()

static double autoregression ( const double *  samples,
int  ar_order,
int  nb_samples,
double *  k,
double *  r,
double *  a 
)
static

Definition at line 255 of file af_adeclick.c.

Referenced by filter_channel().

◆ isfinite_array()

static int isfinite_array ( double *  samples,
int  nb_samples 
)
static

Definition at line 290 of file af_adeclick.c.

Referenced by filter_channel().

◆ find_index()

static int find_index ( int *  index,
int  value,
int  size 
)
static

Definition at line 301 of file af_adeclick.c.

Referenced by interpolation().

◆ factorization()

static int factorization ( double *  matrix,
int  n 
)
static

Definition at line 324 of file af_adeclick.c.

Referenced by do_interpolation().

◆ do_interpolation()

static int do_interpolation ( DeclickChannel *  c,
double *  matrix,
double *  vector,
int  n,
double *  out 
)
static

Definition at line 355 of file af_adeclick.c.

Referenced by interpolation().

◆ interpolation()

static int interpolation ( DeclickChannel *  c,
const double *  src,
int  ar_order,
double *  acoefficients,
int *  index,
int  nb_errors,
double *  auxiliary,
double *  interpolated 
)
static

Definition at line 389 of file af_adeclick.c.

Referenced by filter_channel().

◆ detect_clips()

static int detect_clips ( AudioDeclickContext *  s,
DeclickChannel *  c,
double  unused0,
double *  unused1,
double *  unused2,
uint8_t *  clip,
int *  index,
const double *  src,
double *  dst 
)
static

Definition at line 433 of file af_adeclick.c.

Referenced by init().

◆ detect_clicks()

static int detect_clicks ( AudioDeclickContext *  s,
DeclickChannel *  c,
double  sigmae,
double *  detection,
double *  acoefficients,
uint8_t *  click,
int *  index,
const double *  src,
double *  dst 
)
static

Definition at line 483 of file af_adeclick.c.

Referenced by init().

◆ filter_channel()

static int filter_channel ( AVFilterContext *  ctx,
void *  arg,
int  ch,
int  nb_jobs 
)
static

Definition at line 529 of file af_adeclick.c.

Referenced by filter_frame().

◆ filter_frame()

static int filter_frame ( AVFilterLink *  inlink)
static

Definition at line 594 of file af_adeclick.c.

Referenced by activate().

◆ activate()

static int activate ( AVFilterContext *  ctx)
static

Definition at line 654 of file af_adeclick.c.

◆ init()

static av_cold int init ( AVFilterContext *  ctx)
static

Definition at line 714 of file af_adeclick.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext *  ctx)
static

Definition at line 728 of file af_adeclick.c.

◆ AVFILTER_DEFINE_CLASS() [2/2]

AVFILTER_DEFINE_CLASS ( adeclip  )

Variable Documentation

◆ adeclick_options

const AVOption adeclick_options[]
static
Initial value:
= {
{ "window", "set window size", OFFSET(w), AV_OPT_TYPE_DOUBLE, {.dbl=55}, 10, 100, AF },
{ "w", "set window size", OFFSET(w), AV_OPT_TYPE_DOUBLE, {.dbl=55}, 10, 100, AF },
{ "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_DOUBLE, {.dbl=75}, 50, 95, AF },
{ "o", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_DOUBLE, {.dbl=75}, 50, 95, AF },
{ "arorder", "set autoregression order", OFFSET(ar), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, 25, AF },
{ "a", "set autoregression order", OFFSET(ar), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, 25, AF },
{ "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 1, 100, AF },
{ "t", "set threshold", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 1, 100, AF },
{ "burst", "set burst fusion", OFFSET(burst), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, 10, AF },
{ "b", "set burst fusion", OFFSET(burst), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, 10, AF },
{ "method", "set overlap method", OFFSET(method), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, AF, .unit = "m" },
{ "m", "set overlap method", OFFSET(method), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, AF, .unit = "m" },
{ "add", "overlap-add", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, .unit = "m" },
{ "a", "overlap-add", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, .unit = "m" },
{ "save", "overlap-save", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, .unit = "m" },
{ "s", "overlap-save", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, .unit = "m" },
{ NULL }
}

Definition at line 94 of file af_adeclick.c.

◆ inputs

const AVFilterPad inputs[]
static
Initial value:
= {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = config_input,
},
}

Definition at line 773 of file af_adeclick.c.

◆ ff_af_adeclick

const FFFilter ff_af_adeclick
Initial value:
= {
.p.name = "adeclick",
.p.description = NULL_IF_CONFIG_SMALL("Remove impulsive noise from input audio."),
.p.priv_class = &adeclick_class,
.p.flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
.priv_size = sizeof(AudioDeclickContext),
.init = init,
.activate = activate,
.uninit = uninit,
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(ff_audio_default_filterpad),
FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_DBLP),
}

Definition at line 781 of file af_adeclick.c.

◆ adeclip_options

const AVOption adeclip_options[]
static
Initial value:
= {
{ "window", "set window size", OFFSET(w), AV_OPT_TYPE_DOUBLE, {.dbl=55}, 10, 100, AF },
{ "w", "set window size", OFFSET(w), AV_OPT_TYPE_DOUBLE, {.dbl=55}, 10, 100, AF },
{ "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_DOUBLE, {.dbl=75}, 50, 95, AF },
{ "o", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_DOUBLE, {.dbl=75}, 50, 95, AF },
{ "arorder", "set autoregression order", OFFSET(ar), AV_OPT_TYPE_DOUBLE, {.dbl=8}, 0, 25, AF },
{ "a", "set autoregression order", OFFSET(ar), AV_OPT_TYPE_DOUBLE, {.dbl=8}, 0, 25, AF },
{ "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=10}, 1, 100, AF },
{ "t", "set threshold", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=10}, 1, 100, AF },
{ "hsize", "set histogram size", OFFSET(nb_hbins), AV_OPT_TYPE_INT, {.i64=1000}, 100, 9999, AF },
{ "n", "set histogram size", OFFSET(nb_hbins), AV_OPT_TYPE_INT, {.i64=1000}, 100, 9999, AF },
{ "method", "set overlap method", OFFSET(method), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, AF, .unit = "m" },
{ "m", "set overlap method", OFFSET(method), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, AF, .unit = "m" },
{ "add", "overlap-add", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, .unit = "m" },
{ "a", "overlap-add", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, .unit = "m" },
{ "save", "overlap-save", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, .unit = "m" },
{ "s", "overlap-save", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, .unit = "m" },
{ NULL }
}

Definition at line 795 of file af_adeclick.c.

◆ ff_af_adeclip

const FFFilter ff_af_adeclip
Initial value:
= {
.p.name = "adeclip",
.p.description = NULL_IF_CONFIG_SMALL("Remove clipping from input audio."),
.p.priv_class = &adeclip_class,
.p.flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
.priv_size = sizeof(AudioDeclickContext),
.init = init,
.activate = activate,
.uninit = uninit,
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(ff_audio_default_filterpad),
FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_DBLP),
}

Definition at line 817 of file af_adeclick.c.

FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: filters.h:263
w
uint8_t w
Definition: llviddspenc.c:38
init
static av_cold int init(AVFilterContext *ctx)
Definition: af_adeclick.c:714
activate
static int activate(AVFilterContext *ctx)
Definition: af_adeclick.c:654
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Underlying C type is double.
Definition: opt.h:267
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:201
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: filters.h:264
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_adeclick.c:728
config_input
static int config_input(AVFilterLink *inlink)
Definition: af_adeclick.c:116
AudioDeclickContext
Definition: af_adeclick.c:48
NULL
#define NULL
Definition: coverity.c:32
ff_audio_default_filterpad
const AVFilterPad ff_audio_default_filterpad[1]
An AVFilterPad array whose only entry has name "default" and is of type AVMEDIA_TYPE_AUDIO.
Definition: audio.c:34
FILTER_SINGLE_SAMPLEFMT
#define FILTER_SINGLE_SAMPLEFMT(sample_fmt_)
Definition: filters.h:256
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:94
OFFSET
#define OFFSET(x)
Definition: af_adeclick.c:91
AF
#define AF
Definition: af_adeclick.c:92
inputs
static const AVFilterPad inputs[]
Definition: af_adeclick.c:773
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
AV_SAMPLE_FMT_DBLP
@ AV_SAMPLE_FMT_DBLP
double, planar
Definition: samplefmt.h:67
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:167
AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:205
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition: opt.h:299
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