af_aexciter.c File Reference

#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"
#include "audio.h"

Go to the source code of this file.

Data Structures
struct	ChannelParams
	sample data coding information More...
struct	AExciterContext

Macros
#define	OFFSET(x)   offsetof(AExciterContext, x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Functions
	AVFILTER_DEFINE_CLASS (aexciter)
static double	M (double x)
static double	D (double x)
static void	set_params (ChannelParams *p, double blend, double drive, double srate, double freq, double ceil)
static double	bprocess (double in, const double *const c, double *w1, double *w2)
static double	distortion_process (AExciterContext *s, ChannelParams *p, double in)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)

Variables
static const AVOption	aexciter_options []
static const AVFilterPad	avfilter_af_aexciter_inputs []
const AVFilter	ff_af_aexciter

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(AExciterContext, x)

Definition at line 51 of file af_aexciter.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 52 of file af_aexciter.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

aexciter

)

M()

static double M ( double  x )

inlinestatic

Definition at line 68 of file af_aexciter.c.

Referenced by distortion_process().

D()

static double D ( double  x )

inlinestatic

Definition at line 73 of file af_aexciter.c.

Referenced by distortion_process(), and set_params().

set_params()

static void set_params ( ChannelParams *  p, double  blend, double  drive, double  srate, double  freq, double  ceil  )

static

Definition at line 80 of file af_aexciter.c.

Referenced by config_input().

bprocess()

static double bprocess ( double  in, const double *const  c, double *  w1, double *  w2  )

static

Definition at line 133 of file af_aexciter.c.

Referenced by distortion_process().

distortion_process()

static double distortion_process ( AExciterContext *  s, ChannelParams *  p, double  in  )

static

Definition at line 144 of file af_aexciter.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 172 of file af_aexciter.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 221 of file af_aexciter.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 228 of file af_aexciter.c.

Referenced by process_command().

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 245 of file af_aexciter.c.

Variable Documentation

aexciter_options

const AVOption aexciter_options[]

static

Initial value:

= {
    { "level_in",  "set level in",    OFFSET(level_in),  AV_OPT_TYPE_DOUBLE, {.dbl=1},           0, 64, A },
    { "level_out", "set level out",   OFFSET(level_out), AV_OPT_TYPE_DOUBLE, {.dbl=1},           0, 64, A },
    { "amount", "set amount",         OFFSET(amount),    AV_OPT_TYPE_DOUBLE, {.dbl=1},           0, 64, A },
    { "drive", "set harmonics",       OFFSET(drive),     AV_OPT_TYPE_DOUBLE, {.dbl=8.5},       0.1, 10, A },
    { "blend", "set blend harmonics", OFFSET(blend),     AV_OPT_TYPE_DOUBLE, {.dbl=0},         -10, 10, A },
    { "freq", "set scope",            OFFSET(freq),      AV_OPT_TYPE_DOUBLE, {.dbl=7500},  2000, 12000, A },
    { "ceil", "set ceiling",          OFFSET(ceil),      AV_OPT_TYPE_DOUBLE, {.dbl=9999},  9999, 20000, A },
    { "listen", "enable listen mode", OFFSET(listen),    AV_OPT_TYPE_BOOL,   {.i64=0},        0,     1, A },
    { NULL }
}

Definition at line 54 of file af_aexciter.c.

avfilter_af_aexciter_inputs

const AVFilterPad avfilter_af_aexciter_inputs[]

static

Initial value:

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

Definition at line 258 of file af_aexciter.c.

ff_af_aexciter

const AVFilter ff_af_aexciter

Initial value:

= {
    .name          = "aexciter",
    .description   = NULL_IF_CONFIG_SMALL("Enhance high frequency part of audio."),
    .priv_size     = sizeof(AExciterContext),
    .priv_class    = &aexciter_class,
    .uninit        = uninit,
    FILTER_INPUTS(avfilter_af_aexciter_inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_DBL),
    .process_command = process_command,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
}

Definition at line 267 of file af_aexciter.c.