af_aphaser.c File Reference

phaser audio filter More...

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

Go to the source code of this file.

Data Structures
struct	AudioPhaserContext

Macros
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	MOD(a, b)
#define	PHASER_PLANAR(name, type)
#define	PHASER(name, type)

Functions
	AVFILTER_DEFINE_CLASS (aphaser)
static av_cold int	init (AVFilterContext *ctx)
static int	config_output (AVFilterLink *outlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *inbuf)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	aphaser_options []
static const AVFilterPad	aphaser_inputs []
static const AVFilterPad	aphaser_outputs []
const FFFilter	ff_af_aphaser

Detailed Description

phaser audio filter

Definition in file af_aphaser.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(AudioPhaserContext, x)

Definition at line 56 of file af_aphaser.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 57 of file af_aphaser.c.

MOD

#define MOD	(		a,
			b )

Value:

(((a) >= (b)) ? (a) - (b) : (a))

Definition at line 87 of file af_aphaser.c.

PHASER_PLANAR

#define PHASER_PLANAR	(		name,
			type )

Definition at line 89 of file af_aphaser.c.

PHASER

#define PHASER	(		name,
			type )

Definition at line 125 of file af_aphaser.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

aphaser

)

init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 75 of file af_aphaser.c.

config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 171 of file af_aphaser.c.

filter_frame()

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

static

Definition at line 209 of file af_aphaser.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 235 of file af_aphaser.c.

Variable Documentation

aphaser_options

const AVOption aphaser_options[]

static

Initial value:

= {
    { "in_gain",  "set input gain",            OFFSET(in_gain),  AV_OPT_TYPE_DOUBLE, {.dbl=.4},  0,  1,   FLAGS },
    { "out_gain", "set output gain",           OFFSET(out_gain), AV_OPT_TYPE_DOUBLE, {.dbl=.74}, 0,  1e9, FLAGS },
    { "delay",    "set delay in milliseconds", OFFSET(delay),    AV_OPT_TYPE_DOUBLE, {.dbl=3.},  0,  5,   FLAGS },
    { "decay",    "set decay",                 OFFSET(decay),    AV_OPT_TYPE_DOUBLE, {.dbl=.4},  0, .99,  FLAGS },
    { "speed",    "set modulation speed",      OFFSET(speed),    AV_OPT_TYPE_DOUBLE, {.dbl=.5}, .1,  2,   FLAGS },
    { "type",     "set modulation type",       OFFSET(type),     AV_OPT_TYPE_INT,    {.i64=WAVE_TRI}, 0, WAVE_NB-1, FLAGS, .unit = "type" },
    { "triangular",  NULL, 0, AV_OPT_TYPE_CONST,  {.i64=WAVE_TRI}, 0, 0, FLAGS, .unit = "type" },
    { "t",           NULL, 0, AV_OPT_TYPE_CONST,  {.i64=WAVE_TRI}, 0, 0, FLAGS, .unit = "type" },
    { "sinusoidal",  NULL, 0, AV_OPT_TYPE_CONST,  {.i64=WAVE_SIN}, 0, 0, FLAGS, .unit = "type" },
    { "s",           NULL, 0, AV_OPT_TYPE_CONST,  {.i64=WAVE_SIN}, 0, 0, FLAGS, .unit = "type" },
    { NULL }
}

Definition at line 59 of file af_aphaser.c.

aphaser_inputs

const AVFilterPad aphaser_inputs[]

static

Initial value:

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

Definition at line 243 of file af_aphaser.c.

aphaser_outputs

const AVFilterPad aphaser_outputs[]

static

Initial value:

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

Definition at line 251 of file af_aphaser.c.

ff_af_aphaser

const FFFilter ff_af_aphaser

Initial value:

= {
    .p.name        = "aphaser",
    .p.description = NULL_IF_CONFIG_SMALL("Add a phasing effect to the audio."),
    .p.priv_class  = &aphaser_class,
    .priv_size     = sizeof(AudioPhaserContext),
    .init          = init,
    .uninit        = uninit,
    FILTER_INPUTS(aphaser_inputs),
    FILTER_OUTPUTS(aphaser_outputs),
    FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBLP,
                      AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLTP,
                      AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32P,
                      AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16P),
}

Definition at line 259 of file af_aphaser.c.