af_afftdn.c File Reference

#include <float.h>
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.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	DeNoiseChannel
struct	AudioFFTDeNoiseContext

Macros
#define	C   (M_LN10 * 0.1)
#define	SOLVE_SIZE   (5)
#define	NB_PROFILE_BANDS   (15)
#define	OFFSET(x)
#define	AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	AFR   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Enumerations
enum	SampleNoiseModes { SAMPLE_NONE , SAMPLE_START , SAMPLE_STOP , NB_SAMPLEMODES }
enum	OutModes { IN_MODE , OUT_MODE , NOISE_MODE , NB_MODES }
enum	NoiseLinkType {   NONE_LINK , MIN_LINK , MAX_LINK , AVERAGE_LINK ,   NB_LINK }
enum	NoiseType {   WHITE_NOISE , VINYL_NOISE , SHELLAC_NOISE , CUSTOM_NOISE ,   NB_NOISE }

Functions
	AVFILTER_DEFINE_CLASS (afftdn)
static double	get_band_noise (AudioFFTDeNoiseContext *s, int band, double a, double b, double c)
static void	factor (double *array, int size)
static void	solve (double *matrix, double *vector, int size)
static double	process_get_band_noise (AudioFFTDeNoiseContext *s, DeNoiseChannel *dnch, int band)
static double	limit_gain (double a, double b)
static void	spectral_flatness (AudioFFTDeNoiseContext *s, const double *const spectral, double floor, int len, double *rnum, double *rden)
static void	set_parameters (AudioFFTDeNoiseContext *s, DeNoiseChannel *dnch, int update_var, int update_auto_var)
static double	floor_offset (const double *S, int size, double mean)
static void	process_frame (AVFilterContext *ctx, AudioFFTDeNoiseContext *s, DeNoiseChannel *dnch, double *prior, double *prior_band_excit, int track_noise)
static double	freq2bark (double x)
static int	get_band_centre (AudioFFTDeNoiseContext *s, int band)
static int	get_band_edge (AudioFFTDeNoiseContext *s, int band)
static void	set_band_parameters (AudioFFTDeNoiseContext *s, DeNoiseChannel *dnch)
static void	read_custom_noise (AVFilterContext *ctx, int ch)
static void	reduce_mean (double *band_noise)
static int	config_input (AVFilterLink *inlink)
static void	init_sample_noise (DeNoiseChannel *dnch)
static void	sample_noise_block (AudioFFTDeNoiseContext *s, DeNoiseChannel *dnch, AVFrame *in, int ch)
static void	finish_sample_noise (AudioFFTDeNoiseContext *s, DeNoiseChannel *dnch, double *sample_noise)
static void	set_noise_profile (AVFilterContext *ctx, DeNoiseChannel *dnch, double *sample_noise)
static int	filter_channel (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	output_frame (AVFilterLink *inlink, AVFrame *in)
static int	activate (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)

Variables
static const AVOption	afftdn_options []
static const AVFilterPad	inputs []
const FFFilter	ff_af_afftdn

Macro Definition Documentation

C

#define C   (M_LN10 * 0.1)

Definition at line 33 of file af_afftdn.c.

SOLVE_SIZE

#define SOLVE_SIZE   (5)

Definition at line 34 of file af_afftdn.c.

Referenced by config_input(), process_get_band_noise(), and set_noise_profile().

NB_PROFILE_BANDS

#define NB_PROFILE_BANDS   (15)

Definition at line 35 of file af_afftdn.c.

Referenced by config_input(), finish_sample_noise(), get_band_edge(), init_sample_noise(), output_frame(), process_get_band_noise(), read_custom_noise(), reduce_mean(), sample_noise_block(), set_band_parameters(), set_noise_profile(), and set_parameters().

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(AudioFFTDeNoiseContext, x)

Definition at line 163 of file af_afftdn.c.

AF

#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 164 of file af_afftdn.c.

AFR

#define AFR   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 165 of file af_afftdn.c.

Enumeration Type Documentation

SampleNoiseModes

enum SampleNoiseModes

Enumerator
SAMPLE_NONE
SAMPLE_START
SAMPLE_STOP
NB_SAMPLEMODES

Definition at line 37 of file af_afftdn.c.

OutModes

enum OutModes

Enumerator
IN_MODE
OUT_MODE
NOISE_MODE
NB_MODES

Definition at line 44 of file af_afftdn.c.

NoiseLinkType

enum NoiseLinkType

Enumerator
NONE_LINK
MIN_LINK
MAX_LINK
AVERAGE_LINK
NB_LINK

Definition at line 51 of file af_afftdn.c.

NoiseType

enum NoiseType

Enumerator
WHITE_NOISE
VINYL_NOISE
SHELLAC_NOISE
CUSTOM_NOISE
NB_NOISE

Definition at line 59 of file af_afftdn.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

afftdn

)

get_band_noise()

static double get_band_noise ( AudioFFTDeNoiseContext * s, int band, double a, double b, double c )

static

Definition at line 224 of file af_afftdn.c.

Referenced by config_input().

factor()

static void factor ( double * array, int size )

static

Definition at line 240 of file af_afftdn.c.

solve()

static void solve ( double * matrix, double * vector, int size )

static

Definition at line 254 of file af_afftdn.c.

Referenced by process_get_band_noise(), and set_noise_profile().

process_get_band_noise()

static double process_get_band_noise ( AudioFFTDeNoiseContext * s, DeNoiseChannel * dnch, int band )

static

Definition at line 273 of file af_afftdn.c.

Referenced by set_band_parameters(), and set_parameters().

limit_gain()

static double limit_gain ( double a, double b )

static

Definition at line 303 of file af_afftdn.c.

Referenced by process_frame().

spectral_flatness()

static void spectral_flatness ( AudioFFTDeNoiseContext * s, const double *const spectral, double floor, int len, double * rnum, double * rden )

static

Definition at line 312 of file af_afftdn.c.

Referenced by process_frame().

set_parameters()

static void set_parameters ( AudioFFTDeNoiseContext * s, DeNoiseChannel * dnch, int update_var, int update_auto_var )

static

Definition at line 580 of file af_afftdn.c.

Referenced by config_input(), output_frame(), process_command(), and process_frame().

floor_offset()

static double floor_offset ( const double * S, int size, double mean )

static

Definition at line 340 of file af_afftdn.c.

Referenced by process_frame().

process_frame()

static void process_frame ( AVFilterContext * ctx, AudioFFTDeNoiseContext * s, DeNoiseChannel * dnch, double * prior, double * prior_band_excit, int track_noise )

static

Definition at line 353 of file af_afftdn.c.

Referenced by filter_channel().

freq2bark()

static double freq2bark ( double x )

static

Definition at line 486 of file af_afftdn.c.

Referenced by config_input().

get_band_centre()

static int get_band_centre ( AudioFFTDeNoiseContext * s, int band )

static

Definition at line 493 of file af_afftdn.c.

Referenced by set_band_parameters().

get_band_edge()

static int get_band_edge ( AudioFFTDeNoiseContext * s, int band )

static

Definition at line 501 of file af_afftdn.c.

Referenced by config_input().

set_band_parameters()

static void set_band_parameters ( AudioFFTDeNoiseContext * s, DeNoiseChannel * dnch )

static

Definition at line 514 of file af_afftdn.c.

Referenced by set_parameters().

read_custom_noise()

static void read_custom_noise ( AVFilterContext * ctx, int ch )

static

Definition at line 544 of file af_afftdn.c.

Referenced by config_input().

reduce_mean()

static void reduce_mean ( double * band_noise )

static

Definition at line 620 of file af_afftdn.c.

Referenced by config_input(), and set_noise_profile().

config_input()

static int config_input ( AVFilterLink * inlink )

static

Definition at line 632 of file af_afftdn.c.

init_sample_noise()

static void init_sample_noise ( DeNoiseChannel * dnch )

static

Definition at line 899 of file af_afftdn.c.

Referenced by output_frame().

sample_noise_block()

static void sample_noise_block ( AudioFFTDeNoiseContext * s, DeNoiseChannel * dnch, AVFrame * in, int ch )

static

Definition at line 909 of file af_afftdn.c.

Referenced by output_frame().

finish_sample_noise()

static void finish_sample_noise ( AudioFFTDeNoiseContext * s, DeNoiseChannel * dnch, double * sample_noise )

static

Definition at line 994 of file af_afftdn.c.

Referenced by output_frame().

set_noise_profile()

static void set_noise_profile ( AVFilterContext * ctx, DeNoiseChannel * dnch, double * sample_noise )

static

Definition at line 1013 of file af_afftdn.c.

Referenced by output_frame().

filter_channel()

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

static

Definition at line 1051 of file af_afftdn.c.

output_frame()

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

static

Definition at line 1109 of file af_afftdn.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 1271 of file af_afftdn.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 1298 of file af_afftdn.c.

process_command()

static int process_command ( AVFilterContext * ctx, const char * cmd, const char * args, char * res, int res_len, int flags )

static

Definition at line 1334 of file af_afftdn.c.

Variable Documentation

afftdn_options

const AVOption afftdn_options[]

static

Definition at line 167 of file af_afftdn.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .config_props = config_input,
    },
}

Definition at line 1360 of file af_afftdn.c.

ff_af_afftdn

const FFFilter ff_af_afftdn

Initial value:

= {
    .p.name          = "afftdn",
    .p.description   = NULL_IF_CONFIG_SMALL("Denoise audio samples using FFT."),
    .p.priv_class    = &afftdn_class,
    .p.flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
                       AVFILTER_FLAG_SLICE_THREADS,
    .priv_size       = sizeof(AudioFFTDeNoiseContext),
    .activate        = activate,
    .uninit          = uninit,
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP),
    .process_command = process_command,
}

Definition at line 1368 of file af_afftdn.c.