af_extrastereo.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "formats.h"

Go to the source code of this file.

Data Structures
struct	ExtraStereoContext

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

Functions
	AVFILTER_DEFINE_CLASS (extrastereo)
static int	query_formats (AVFilterContext *ctx)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)

Variables
static const AVOption	extrastereo_options []
static const AVFilterPad	inputs []
static const AVFilterPad	outputs []
AVFilter	ff_af_extrastereo

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(ExtraStereoContext, x)

Definition at line 33 of file af_extrastereo.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 34 of file af_extrastereo.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

extrastereo

)

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 44 of file af_extrastereo.c.

filter_frame()

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

static

Definition at line 60 of file af_extrastereo.c.

Variable Documentation

extrastereo_options

const AVOption extrastereo_options[]

static

Initial value:

= {
    { "m", "set the difference coefficient", OFFSET(mult), AV_OPT_TYPE_FLOAT, {.dbl=2.5}, -10, 10, A },
    { "c", "enable clipping",                OFFSET(clip), AV_OPT_TYPE_BOOL,  {.i64=1},     0,  1, A },
    { NULL }
}

Definition at line 36 of file af_extrastereo.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 106 of file af_extrastereo.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 115 of file af_extrastereo.c.

ff_af_extrastereo

AVFilter ff_af_extrastereo

Initial value:

= {
    .name           = "extrastereo",
    .description    = NULL_IF_CONFIG_SMALL("Increase difference between stereo audio channels."),
    .query_formats  = query_formats,
    .priv_size      = sizeof(ExtraStereoContext),
    .priv_class     = &extrastereo_class,
    .inputs         = inputs,
    .outputs        = outputs,
    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}

Definition at line 123 of file af_extrastereo.c.