af_anlmdn.c File Reference

#include <float.h>
#include "libavutil/avassert.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"
#include "af_anlmdndsp.h"

Go to the source code of this file.

Data Structures
struct	AudioNLMeansContext

Macros
#define	WEIGHT_LUT_NBITS   20
#define	WEIGHT_LUT_SIZE   (1<<WEIGHT_LUT_NBITS)
#define	OFFSET(x)
#define	AFT   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Enumerations
enum	OutModes { IN_MODE , OUT_MODE , NOISE_MODE , NB_MODES }

Functions
	AVFILTER_DEFINE_CLASS (anlmdn)
static float	sqrdiff (float x, float y)
static float	compute_distance_ssd_c (const float *f1, const float *f2, ptrdiff_t K)
static void	compute_cache_c (float *cache, const float *f, ptrdiff_t S, ptrdiff_t K, ptrdiff_t i, ptrdiff_t jj)
void	ff_anlmdn_init (AudioNLMDNDSPContext *dsp)
static int	config_filter (AVFilterContext *ctx)
static int	config_output (AVFilterLink *outlink)
static int	filter_channel (AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	activate (AVFilterContext *ctx)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	anlmdn_options []
static const AVFilterPad	outputs []
const FFFilter	ff_af_anlmdn

Macro Definition Documentation

WEIGHT_LUT_NBITS

#define WEIGHT_LUT_NBITS   20

Definition at line 31 of file af_anlmdn.c.

WEIGHT_LUT_SIZE

#define WEIGHT_LUT_SIZE   (1<<WEIGHT_LUT_NBITS)

Definition at line 32 of file af_anlmdn.c.

Referenced by config_filter(), and filter_channel().

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(AudioNLMeansContext, x)

Definition at line 65 of file af_anlmdn.c.

AFT

#define AFT   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 66 of file af_anlmdn.c.

Enumeration Type Documentation

OutModes

enum OutModes

Enumerator
IN_MODE
OUT_MODE
NOISE_MODE
NB_MODES

Definition at line 58 of file af_anlmdn.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

anlmdn

)

sqrdiff()

static float sqrdiff ( float x, float y )

inlinestatic

Definition at line 87 of file af_anlmdn.c.

Referenced by compute_cache_c(), and compute_distance_ssd_c().

compute_distance_ssd_c()

static float compute_distance_ssd_c ( const float * f1, const float * f2, ptrdiff_t K )

static

Definition at line 94 of file af_anlmdn.c.

Referenced by ff_anlmdn_init().

compute_cache_c()

static void compute_cache_c ( float * cache, const float * f, ptrdiff_t S, ptrdiff_t K, ptrdiff_t i, ptrdiff_t jj )

static

Definition at line 104 of file af_anlmdn.c.

Referenced by ff_anlmdn_init().

ff_anlmdn_init()

void ff_anlmdn_init

(

AudioNLMDNDSPContext *

dsp

)

Definition at line 114 of file af_anlmdn.c.

Referenced by config_output().

config_filter()

static int config_filter ( AVFilterContext * ctx )

static

Definition at line 124 of file af_anlmdn.c.

Referenced by config_output(), and process_command().

config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 183 of file af_anlmdn.c.

filter_channel()

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

static

Definition at line 198 of file af_anlmdn.c.

filter_frame()

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

static

Definition at line 267 of file af_anlmdn.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 294 of file af_anlmdn.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 324 of file af_anlmdn.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 336 of file af_anlmdn.c.

Variable Documentation

anlmdn_options

const AVOption anlmdn_options[]

static

Initial value:

= {
    { "strength", "set denoising strength", OFFSET(a),  AV_OPT_TYPE_FLOAT,    {.dbl=0.00001},0.00001, 10000, AFT },
    { "s", "set denoising strength", OFFSET(a),  AV_OPT_TYPE_FLOAT,    {.dbl=0.00001},0.00001, 10000, AFT },
    { "patch", "set patch duration", OFFSET(pd), AV_OPT_TYPE_DURATION, {.i64=2000}, 1000, 100000, AFT },
    { "p", "set patch duration",     OFFSET(pd), AV_OPT_TYPE_DURATION, {.i64=2000}, 1000, 100000, AFT },
    { "research", "set research duration",  OFFSET(rd), AV_OPT_TYPE_DURATION, {.i64=6000}, 2000, 300000, AFT },
    { "r", "set research duration",  OFFSET(rd), AV_OPT_TYPE_DURATION, {.i64=6000}, 2000, 300000, AFT },
    { "output", "set output mode",   OFFSET(om), AV_OPT_TYPE_INT,      {.i64=OUT_MODE},  0, NB_MODES-1, AFT, .unit = "mode" },
    { "o", "set output mode",        OFFSET(om), AV_OPT_TYPE_INT,      {.i64=OUT_MODE},  0, NB_MODES-1, AFT, .unit = "mode" },
    {  "i", "input",                 0,          AV_OPT_TYPE_CONST,    {.i64=IN_MODE},   0,  0, AFT, .unit = "mode" },
    {  "o", "output",                0,          AV_OPT_TYPE_CONST,    {.i64=OUT_MODE},  0,  0, AFT, .unit = "mode" },
    {  "n", "noise",                 0,          AV_OPT_TYPE_CONST,    {.i64=NOISE_MODE},0,  0, AFT, .unit = "mode" },
    { "smooth", "set smooth factor", OFFSET(m),  AV_OPT_TYPE_FLOAT,    {.dbl=11.},       1, 1000, AFT },
    { "m", "set smooth factor",      OFFSET(m),  AV_OPT_TYPE_FLOAT,    {.dbl=11.},       1, 1000, AFT },
    { NULL }
}

Definition at line 68 of file af_anlmdn.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 344 of file af_anlmdn.c.

ff_af_anlmdn

const FFFilter ff_af_anlmdn

Initial value:

= {
    .p.name        = "anlmdn",
    .p.description = NULL_IF_CONFIG_SMALL("Reduce broadband noise from stream using Non-Local Means."),
    .p.priv_class  = &anlmdn_class,
    .p.flags       = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
                     AVFILTER_FLAG_SLICE_THREADS,
    .priv_size     = sizeof(AudioNLMeansContext),
    .activate      = activate,
    .uninit        = uninit,
    FILTER_INPUTS(ff_audio_default_filterpad),
    FILTER_OUTPUTS(outputs),
    FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_FLTP),
    .process_command = process_command,
}

Definition at line 352 of file af_anlmdn.c.