af_asoftclip.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "formats.h"

Go to the source code of this file.

Data Structures
struct	ASoftClipContext

Macros
#define	OFFSET(x)   offsetof(ASoftClipContext, x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	SQR(x)   ((x) * (x))

Enumerations
enum	ASoftClipTypes {   ASC_TANH, ASC_ATAN, ASC_CUBIC, ASC_EXP,   ASC_ALG, ASC_QUINTIC, ASC_SIN, NB_TYPES }

Functions
	AVFILTER_DEFINE_CLASS (asoftclip)
static int	query_formats (AVFilterContext *ctx)
static void	filter_flt (ASoftClipContext *s, void **dptr, const void **sptr, int nb_samples, int channels)
static void	filter_dbl (ASoftClipContext *s, void **dptr, const void **sptr, int nb_samples, int channels)
static int	config_input (AVFilterLink *inlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)

Variables
static const AVOption	asoftclip_options []
static const AVFilterPad	inputs []
static const AVFilterPad	outputs []
AVFilter	ff_af_asoftclip

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(ASoftClipContext, x)

Definition at line 48 of file af_asoftclip.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 49 of file af_asoftclip.c.

SQR

#define SQR

(

x

)

((x) * (x))

Definition at line 96 of file af_asoftclip.c.

Enumeration Type Documentation

ASoftClipTypes

enum ASoftClipTypes

Enumerator
ASC_TANH
ASC_ATAN
ASC_CUBIC
ASC_EXP
ASC_ALG
ASC_QUINTIC
ASC_SIN
NB_TYPES

Definition at line 27 of file af_asoftclip.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

asoftclip

)

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 66 of file af_asoftclip.c.

filter_flt()

static void filter_flt ( ASoftClipContext *  s, void **  dptr, const void **  sptr, int  nb_samples, int  channels  )

static

Definition at line 98 of file af_asoftclip.c.

Referenced by config_input().

filter_dbl()

static void filter_dbl ( ASoftClipContext *  s, void **  dptr, const void **  sptr, int  nb_samples, int  channels  )

static

Definition at line 154 of file af_asoftclip.c.

Referenced by config_input().

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 210 of file af_asoftclip.c.

filter_frame()

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

static

Definition at line 225 of file af_asoftclip.c.

Variable Documentation

asoftclip_options

const AVOption asoftclip_options[]

static

Initial value:

= {
    { "type", "set softclip type", OFFSET(type), AV_OPT_TYPE_INT,    {.i64=0},          0, NB_TYPES-1, A, "types" },
    { "tanh",                NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_TANH},   0,          0, A, "types" },
    { "atan",                NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_ATAN},   0,          0, A, "types" },
    { "cubic",               NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_CUBIC},  0,          0, A, "types" },
    { "exp",                 NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_EXP},    0,          0, A, "types" },
    { "alg",                 NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_ALG},    0,          0, A, "types" },
    { "quintic",             NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_QUINTIC},0,          0, A, "types" },
    { "sin",                 NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_SIN},    0,          0, A, "types" },
    { "param", "set softclip parameter", OFFSET(param), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.01,        3, A },
    { NULL }
}

Definition at line 51 of file af_asoftclip.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 261 of file af_asoftclip.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 271 of file af_asoftclip.c.

ff_af_asoftclip

AVFilter ff_af_asoftclip

Initial value:

= {
    .name           = "asoftclip",
    .description    = NULL_IF_CONFIG_SMALL("Audio Soft Clipper."),
    .query_formats  = query_formats,
    .priv_size      = sizeof(ASoftClipContext),
    .priv_class     = &asoftclip_class,
    .inputs         = inputs,
    .outputs        = outputs,
    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}

Definition at line 279 of file af_asoftclip.c.