af_anlms.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/float_dsp.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "formats.h"
#include "filters.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	AudioNLMSContext

Macros
#define	OFFSET(x)   offsetof(AudioNLMSContext, x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	AT   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 ,   IN_MODE , OUT_MODE , NOISE_MODE , NB_MODES ,   IN_MODE , DESIRED_MODE , OUT_MODE , NOISE_MODE ,   NB_OMODES , IN_MODE , OUT_MODE , ESS_MODE ,   NB_MODES }

Functions
	AVFILTER_DEFINE_CLASS (anlms)
static int	query_formats (AVFilterContext *ctx)
static float	fir_sample (AudioNLMSContext *s, float sample, float *delay, float *coeffs, float *tmp, int *offset)
static float	process_sample (AudioNLMSContext *s, float input, float desired, float *delay, float *coeffs, float *tmp, int *offsetp)
static int	process_channels (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	activate (AVFilterContext *ctx)
static int	config_output (AVFilterLink *outlink)
static av_cold int	init (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	anlms_options []
static const AVFilterPad	inputs []
static const AVFilterPad	outputs []
AVFilter	ff_af_anlms

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(AudioNLMSContext, x)

Definition at line 61 of file af_anlms.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 62 of file af_anlms.c.

AT

#define AT   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 63 of file af_anlms.c.

Enumeration Type Documentation

OutModes

enum OutModes

Enumerator
IN_MODE
OUT_MODE
NOISE_MODE
NB_MODES
IN_MODE
OUT_MODE
NOISE_MODE
NB_MODES
IN_MODE
DESIRED_MODE
OUT_MODE
NOISE_MODE
NB_OMODES
IN_MODE
OUT_MODE
ESS_MODE
NB_MODES

Definition at line 33 of file af_anlms.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

anlms

)

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 80 of file af_anlms.c.

fir_sample()

static float fir_sample ( AudioNLMSContext *  s, float  sample, float *  delay, float *  coeffs, float *  tmp, int *  offset  )

static

Definition at line 110 of file af_anlms.c.

Referenced by process_sample().

process_sample()

static float process_sample ( AudioNLMSContext *  s, float  input, float  desired, float *  delay, float *  coeffs, float *  tmp, int *  offsetp  )

static

Definition at line 128 of file af_anlms.c.

Referenced by process_channels().

process_channels()

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

static

Definition at line 165 of file af_anlms.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 188 of file af_anlms.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 253 of file af_anlms.c.

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 274 of file af_anlms.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 285 of file af_anlms.c.

Variable Documentation

anlms_options

const AVOption anlms_options[]

static

Initial value:

= {
    { "order",   "set the filter order",   OFFSET(order),   AV_OPT_TYPE_INT,   {.i64=256},  1, INT16_MAX, A },
    { "mu",      "set the filter mu",      OFFSET(mu),      AV_OPT_TYPE_FLOAT, {.dbl=0.75}, 0, 2, AT },
    { "eps",     "set the filter eps",     OFFSET(eps),     AV_OPT_TYPE_FLOAT, {.dbl=1},    0, 1, AT },
    { "leakage", "set the filter leakage", OFFSET(leakage), AV_OPT_TYPE_FLOAT, {.dbl=0},    0, 1, AT },
    { "out_mode", "set output mode",       OFFSET(output_mode), AV_OPT_TYPE_INT, {.i64=OUT_MODE}, 0, NB_OMODES-1, AT, "mode" },
    {  "i", "input",                 0,          AV_OPT_TYPE_CONST,    {.i64=IN_MODE},      0, 0, AT, "mode" },
    {  "d", "desired",               0,          AV_OPT_TYPE_CONST,    {.i64=DESIRED_MODE}, 0, 0, AT, "mode" },
    {  "o", "output",                0,          AV_OPT_TYPE_CONST,    {.i64=OUT_MODE},     0, 0, AT, "mode" },
    {  "n", "noise",                 0,          AV_OPT_TYPE_CONST,    {.i64=NOISE_MODE},   0, 0, AT, "mode" },
    { NULL }
}

Definition at line 65 of file af_anlms.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

= {
    {
        .name = "input",
        .type = AVMEDIA_TYPE_AUDIO,
    },
    {
        .name = "desired",
        .type = AVMEDIA_TYPE_AUDIO,
    },
    { NULL }
}

Definition at line 296 of file af_anlms.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 308 of file af_anlms.c.

ff_af_anlms

AVFilter ff_af_anlms

Initial value:

= {
    .name           = "anlms",
    .description    = NULL_IF_CONFIG_SMALL("Apply Normalized Least-Mean-Squares algorithm to first audio stream."),
    .priv_size      = sizeof(AudioNLMSContext),
    .priv_class     = &anlms_class,
    .init           = init,
    .uninit         = uninit,
    .activate       = activate,
    .query_formats  = query_formats,
    .inputs         = inputs,
    .outputs        = outputs,
    .flags          = AVFILTER_FLAG_SLICE_THREADS,
    .process_command = ff_filter_process_command,
}

Definition at line 317 of file af_anlms.c.