af_asoftclip.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"

Go to the source code of this file.

Data Structures
struct	Lowpass
struct	ASoftClipContext
struct	ThreadData
	Used for passing data between threads. More...

Macros
#define	MAX_OVERSAMPLE   64
#define	OFFSET(x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Enumerations
enum	ASoftClipTypes {   ASC_HARD = -1 , ASC_TANH , ASC_ATAN , ASC_CUBIC ,   ASC_EXP , ASC_ALG , ASC_QUINTIC , ASC_SIN ,   ASC_ERF , NB_TYPES }

Functions
	AVFILTER_DEFINE_CLASS (asoftclip)
static void	get_lowpass (Lowpass *s, double frequency, double sample_rate)
static float	run_lowpassf (const Lowpass *const s, float src, float *w)
static void	filter_flt (ASoftClipContext *s, void **dptr, const void **sptr, int nb_samples, int channels, int start, int end)
static double	run_lowpassd (const Lowpass *const s, double src, double *w)
static void	filter_dbl (ASoftClipContext *s, void **dptr, const void **sptr, int nb_samples, int channels, int start, int end)
static int	config_input (AVFilterLink *inlink)
static int	filter_channels (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	asoftclip_options []
static const AVFilterPad	inputs []
const FFFilter	ff_af_asoftclip

Macro Definition Documentation

MAX_OVERSAMPLE

#define MAX_OVERSAMPLE   64

Definition at line 28 of file af_asoftclip.c.

Referenced by config_input().

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(ASoftClipContext, x)

Definition at line 68 of file af_asoftclip.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 69 of file af_asoftclip.c.

Enumeration Type Documentation

ASoftClipTypes

enum ASoftClipTypes

Enumerator
ASC_HARD
ASC_TANH
ASC_ATAN
ASC_CUBIC
ASC_EXP
ASC_ALG
ASC_QUINTIC
ASC_SIN
ASC_ERF
NB_TYPES

Definition at line 30 of file af_asoftclip.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

asoftclip

)

get_lowpass()

static void get_lowpass ( Lowpass * s, double frequency, double sample_rate )

static

Definition at line 91 of file af_asoftclip.c.

Referenced by config_input().

run_lowpassf()

static float run_lowpassf ( const Lowpass *const s, float src, float * w )

inlinestatic

Definition at line 126 of file af_asoftclip.c.

Referenced by filter_flt().

filter_flt()

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

static

Definition at line 138 of file af_asoftclip.c.

run_lowpassd()

static double run_lowpassd ( const Lowpass *const s, double src, double * w )

inlinestatic

Definition at line 251 of file af_asoftclip.c.

Referenced by filter_dbl().

filter_dbl()

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

static

Definition at line 263 of file af_asoftclip.c.

config_input()

static int config_input ( AVFilterLink * inlink )

static

Definition at line 376 of file af_asoftclip.c.

filter_channels()

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

static

Definition at line 405 of file af_asoftclip.c.

filter_frame()

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

static

Definition at line 422 of file af_asoftclip.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 459 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},         -1, NB_TYPES-1, A, .unit = "types" },
    { "hard",                NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_HARD},   0,          0, A, .unit = "types" },
    { "tanh",                NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_TANH},   0,          0, A, .unit = "types" },
    { "atan",                NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_ATAN},   0,          0, A, .unit = "types" },
    { "cubic",               NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_CUBIC},  0,          0, A, .unit = "types" },
    { "exp",                 NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_EXP},    0,          0, A, .unit = "types" },
    { "alg",                 NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_ALG},    0,          0, A, .unit = "types" },
    { "quintic",             NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_QUINTIC},0,          0, A, .unit = "types" },
    { "sin",                 NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_SIN},    0,          0, A, .unit = "types" },
    { "erf",                 NULL,            0, AV_OPT_TYPE_CONST,  {.i64=ASC_ERF},    0,          0, A, .unit = "types" },
    { "threshold", "set softclip threshold", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.000001, 1, A },
    { "output", "set softclip output gain", OFFSET(output), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.000001, 16, A },
    { "param", "set softclip parameter", OFFSET(param), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.01,        3, A },
    { "oversample", "set oversample factor", OFFSET(oversample), AV_OPT_TYPE_INT, {.i64=1}, 1, MAX_OVERSAMPLE, A },
    { NULL }
}

Definition at line 71 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,
    },
}

Definition at line 467 of file af_asoftclip.c.

ff_af_asoftclip

const FFFilter ff_af_asoftclip

Initial value:

= {
    .p.name         = "asoftclip",
    .p.description  = NULL_IF_CONFIG_SMALL("Audio Soft Clipper."),
    .p.priv_class   = &asoftclip_class,
    .p.flags        = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC |
                      AVFILTER_FLAG_SLICE_THREADS,
    .priv_size      = sizeof(ASoftClipContext),
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP),
    .uninit         = uninit,
    .process_command = ff_filter_process_command,
}

Definition at line 476 of file af_asoftclip.c.