af_virtualbass.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "internal.h"
#include <float.h>

Go to the source code of this file.

Data Structures
struct	AudioVirtualBassContext

Macros
#define	OFFSET(x)   offsetof(AudioVirtualBassContext, x)
#define	TFLAGS   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
#define	FLAGS   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
#define	SQR(x)   ((x) * (x))

Functions
	AVFILTER_DEFINE_CLASS (virtualbass)
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static double	vb_fun (double x)
static void	vb_stereo (AVFilterContext *ctx, AVFrame *out, AVFrame *in)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)

Variables
static const AVOption	virtualbass_options []
static const AVFilterPad	inputs []
const AVFilter	ff_af_virtualbass

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(AudioVirtualBassContext, x)

Definition at line 40 of file af_virtualbass.c.

TFLAGS

#define TFLAGS   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 41 of file af_virtualbass.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM

Definition at line 42 of file af_virtualbass.c.

SQR

#define SQR

(

x

)

((x) * (x))

Definition at line 88 of file af_virtualbass.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

virtualbass

)

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 52 of file af_virtualbass.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 69 of file af_virtualbass.c.

vb_fun()

static double vb_fun ( double  x )

static

Definition at line 90 of file af_virtualbass.c.

Referenced by vb_stereo().

vb_stereo()

static void vb_stereo ( AVFilterContext *  ctx, AVFrame *  out, AVFrame *  in  )

static

Definition at line 97 of file af_virtualbass.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 139 of file af_virtualbass.c.

Variable Documentation

virtualbass_options

const AVOption virtualbass_options[]

static

Initial value:

= {
    { "cutoff",   "set virtual bass cutoff",   OFFSET(cutoff),   AV_OPT_TYPE_DOUBLE, {.dbl=250},100,500, FLAGS },
    { "strength", "set virtual bass strength", OFFSET(strength), AV_OPT_TYPE_DOUBLE, {.dbl=3},  0.5,  3, TFLAGS },
    {NULL}
}

Definition at line 44 of file af_virtualbass.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 158 of file af_virtualbass.c.

ff_af_virtualbass

const AVFilter ff_af_virtualbass

Initial value:

= {
    .name            = "virtualbass",
    .description     = NULL_IF_CONFIG_SMALL("Audio Virtual Bass."),
    .priv_size       = sizeof(AudioVirtualBassContext),
    .priv_class      = &virtualbass_class,
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_QUERY_FUNC(query_formats),
    .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
    .process_command = ff_filter_process_command,
}

Definition at line 167 of file af_virtualbass.c.