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 <float.h>

Go to the source code of this file.

Data Structures
struct	AudioVirtualBassContext

Macros
#define	OFFSET(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)

Functions
	AVFILTER_DEFINE_CLASS (virtualbass)
static int	query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
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 FFFilter	ff_af_virtualbass

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(AudioVirtualBassContext, x)

Definition at line 39 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 40 of file af_virtualbass.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM

Definition at line 41 of file af_virtualbass.c.

SQR

#define SQR

(

x

)

Value:

((x) * (x))

Definition at line 95 of file af_virtualbass.c.

Referenced by vb_fun().

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

virtualbass

)

query_formats()

static int query_formats ( const AVFilterContext * ctx, AVFilterFormatsConfig ** cfg_in, AVFilterFormatsConfig ** cfg_out )

static

Definition at line 51 of file af_virtualbass.c.

config_input()

static int config_input ( AVFilterLink * inlink )

static

Definition at line 76 of file af_virtualbass.c.

vb_fun()

static double vb_fun ( double x )

static

Definition at line 97 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 104 of file af_virtualbass.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 146 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 43 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 165 of file af_virtualbass.c.

ff_af_virtualbass

const FFFilter ff_af_virtualbass

Initial value:

= {
    .p.name          = "virtualbass",
    .p.description   = NULL_IF_CONFIG_SMALL("Audio Virtual Bass."),
    .p.priv_class    = &virtualbass_class,
    .p.flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
    .priv_size       = sizeof(AudioVirtualBassContext),
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_QUERY_FUNC2(query_formats),
    .process_command = ff_filter_process_command,
}

Definition at line 174 of file af_virtualbass.c.