af_compensationdelay.c File Reference

#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"

Go to the source code of this file.

Data Structures
struct	CompensationDelayContext

Macros
#define	OFFSET(x)   offsetof(CompensationDelayContext, x)
#define	A   (AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM)
#define	COMP_DELAY_MAX_DISTANCE   (100.0 * 100.0 + 100.0 * 1.0 + 1.0)
#define	COMP_DELAY_SOUND_SPEED_KM_H(temp)   1.85325 * (643.95 * sqrt(((temp + 273.15) / 273.15)))
#define	COMP_DELAY_SOUND_SPEED_CM_S(temp)   (COMP_DELAY_SOUND_SPEED_KM_H(temp) * (1000.0 * 100.0) /* cm/km */ / (60.0 * 60.0) /* s/h */)
#define	COMP_DELAY_SOUND_FRONT_DELAY(temp)   (1.0 / COMP_DELAY_SOUND_SPEED_CM_S(temp))
#define	COMP_DELAY_MAX_DELAY   (COMP_DELAY_MAX_DISTANCE * COMP_DELAY_SOUND_FRONT_DELAY(50))

Functions
	AVFILTER_DEFINE_CLASS (compensationdelay)
static int	config_input (AVFilterLink *inlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	compensationdelay_options []
static const AVFilterPad	compensationdelay_inputs []
const AVFilter	ff_af_compensationdelay

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(CompensationDelayContext, x)

Definition at line 42 of file af_compensationdelay.c.

A

#define A   (AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM)

Definition at line 43 of file af_compensationdelay.c.

COMP_DELAY_MAX_DISTANCE

#define COMP_DELAY_MAX_DISTANCE   (100.0 * 100.0 + 100.0 * 1.0 + 1.0)

Definition at line 58 of file af_compensationdelay.c.

COMP_DELAY_SOUND_SPEED_KM_H

#define COMP_DELAY_SOUND_SPEED_KM_H

(

temp

)

1.85325 * (643.95 * sqrt(((temp + 273.15) / 273.15)))

Definition at line 60 of file af_compensationdelay.c.

COMP_DELAY_SOUND_SPEED_CM_S

#define COMP_DELAY_SOUND_SPEED_CM_S

(

temp

)

(COMP_DELAY_SOUND_SPEED_KM_H(temp) * (1000.0 * 100.0) /* cm/km */ / (60.0 * 60.0) /* s/h */)

Definition at line 61 of file af_compensationdelay.c.

COMP_DELAY_SOUND_FRONT_DELAY

#define COMP_DELAY_SOUND_FRONT_DELAY

(

temp

)

(1.0 / COMP_DELAY_SOUND_SPEED_CM_S(temp))

Definition at line 62 of file af_compensationdelay.c.

COMP_DELAY_MAX_DELAY

#define COMP_DELAY_MAX_DELAY   (COMP_DELAY_MAX_DISTANCE * COMP_DELAY_SOUND_FRONT_DELAY(50))

Definition at line 64 of file af_compensationdelay.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

compensationdelay

)

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 66 of file af_compensationdelay.c.

filter_frame()

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

static

Definition at line 87 of file af_compensationdelay.c.

process_command()

static int process_command ( AVFilterContext *  ctx, const char *  cmd, const char *  args, char *  res, int  res_len, int  flags  )

static

Definition at line 136 of file af_compensationdelay.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 153 of file af_compensationdelay.c.

Variable Documentation

compensationdelay_options

const AVOption compensationdelay_options[]

static

Initial value:

= {
    { "mm",   "set mm distance",    OFFSET(distance_mm), AV_OPT_TYPE_INT,    {.i64=0},    0,  10, A },
    { "cm",   "set cm distance",    OFFSET(distance_cm), AV_OPT_TYPE_INT,    {.i64=0},    0, 100, A },
    { "m",    "set meter distance", OFFSET(distance_m),  AV_OPT_TYPE_INT,    {.i64=0},    0, 100, A },
    { "dry",  "set dry amount",     OFFSET(dry),         AV_OPT_TYPE_DOUBLE, {.dbl=0},    0,   1, A },
    { "wet",  "set wet amount",     OFFSET(wet),         AV_OPT_TYPE_DOUBLE, {.dbl=1},    0,   1, A },
    { "temp", "set temperature °C", OFFSET(temp),        AV_OPT_TYPE_INT,    {.i64=20}, -50,  50, A },
    { NULL }
}

Definition at line 45 of file af_compensationdelay.c.

compensationdelay_inputs

const AVFilterPad compensationdelay_inputs[]

static

Initial value:

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

Definition at line 160 of file af_compensationdelay.c.

ff_af_compensationdelay

const AVFilter ff_af_compensationdelay

Initial value:

= {
    .name          = "compensationdelay",
    .description   = NULL_IF_CONFIG_SMALL("Audio Compensation Delay Line."),
    .priv_size     = sizeof(CompensationDelayContext),
    .priv_class    = &compensationdelay_class,
    .uninit        = uninit,
    FILTER_INPUTS(compensationdelay_inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_DBLP),
    .process_command = process_command,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
}

Definition at line 169 of file af_compensationdelay.c.