af_anlms.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/float_dsp.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "anlms_template.c"

Go to the source code of this file.

Data Structures
struct	AudioNLMSContext

Macros
#define	OFFSET(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
#define	DEPTH   32
#define	DEPTH   64

Enumerations
enum	OutModes {   IN_MODE , DESIRED_MODE , OUT_MODE , NOISE_MODE ,   ERROR_MODE , NB_OMODES }

Functions
	AVFILTER_DEFINE_CLASS_EXT (anlms, "anlm(f|s)", anlms_options)
static int	query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
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 []
const FFFilter	ff_af_anlms
const FFFilter	ff_af_anlmf

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(AudioNLMSContext, x)

Definition at line 66 of file af_anlms.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 67 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 68 of file af_anlms.c.

DEPTH [1/2]

#define DEPTH   32

Definition at line 175 of file af_anlms.c.

DEPTH [2/2]

#define DEPTH   64

Definition at line 175 of file af_anlms.c.

Enumeration Type Documentation

OutModes

enum OutModes

Enumerator
IN_MODE
DESIRED_MODE
OUT_MODE
NOISE_MODE
ERROR_MODE
NB_OMODES

Definition at line 32 of file af_anlms.c.

Function Documentation

AVFILTER_DEFINE_CLASS_EXT()

AVFILTER_DEFINE_CLASS_EXT	(	anlms	,
		"anlm(f|s)"	,
		anlms_options	)

query_formats()

static int query_formats ( const AVFilterContext * ctx, AVFilterFormatsConfig ** cfg_in, AVFilterFormatsConfig ** cfg_out )

static

Definition at line 90 of file af_anlms.c.

activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 109 of file af_anlms.c.

config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 182 of file af_anlms.c.

init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 213 of file af_anlms.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 224 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, .unit = "mode" },
    {  "i", "input",                 0,          AV_OPT_TYPE_CONST,    {.i64=IN_MODE},      0, 0, AT, .unit = "mode" },
    {  "d", "desired",               0,          AV_OPT_TYPE_CONST,    {.i64=DESIRED_MODE}, 0, 0, AT, .unit = "mode" },
    {  "o", "output",                0,          AV_OPT_TYPE_CONST,    {.i64=OUT_MODE},     0, 0, AT, .unit = "mode" },
    {  "n", "noise",                 0,          AV_OPT_TYPE_CONST,    {.i64=NOISE_MODE},   0, 0, AT, .unit = "mode" },
    {  "e", "error",                 0,          AV_OPT_TYPE_CONST,    {.i64=ERROR_MODE},   0, 0, AT, .unit = "mode" },
    { "precision", "set processing precision", OFFSET(precision),  AV_OPT_TYPE_INT,    {.i64=0},   0, 2, A, .unit = "precision" },
    {   "auto",  "set auto processing precision",                  0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A, .unit = "precision" },
    {   "float", "set single-floating point processing precision", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, A, .unit = "precision" },
    {   "double","set double-floating point processing precision", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, A, .unit = "precision" },
    { NULL }
}

Definition at line 70 of file af_anlms.c.

Referenced by AVFILTER_DEFINE_CLASS_EXT().

inputs

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 235 of file af_anlms.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 246 of file af_anlms.c.

ff_af_anlms

const FFFilter ff_af_anlms

Initial value:

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

Definition at line 254 of file af_anlms.c.

ff_af_anlmf

const FFFilter ff_af_anlmf

Initial value:

= {
    .p.name         = "anlmf",
    .p.description  = NULL_IF_CONFIG_SMALL("Apply Normalized Least-Mean-Fourth algorithm to first audio stream."),
    .p.priv_class   = &anlms_class,
    .p.flags        = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
                      AVFILTER_FLAG_SLICE_THREADS,
    .priv_size      = sizeof(AudioNLMSContext),
    .init           = init,
    .uninit         = uninit,
    .activate       = activate,
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(outputs),
    FILTER_QUERY_FUNC2(query_formats),
    .process_command = ff_filter_process_command,
}

Definition at line 270 of file af_anlms.c.