af_compand.c File Reference

audio compand filter More...

#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/ffmath.h"
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
#include "audio.h"
#include "avfilter.h"
#include "internal.h"

Classes
struct	ChanParam
struct	CompandSegment
struct	CompandContext

Macros
#define	OFFSET(x)   offsetof(CompandContext, x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	MOD(a, b)   (((a) >= (b)) ? (a) - (b) : (a))
#define	S(x)   s->segments[2 * ((x) + 1)]
#define	S(x)   s->segments[2 * (x)]
#define	L(x)   s->segments[i - (x)]

Typedefs
typedef struct ChanParam	ChanParam
typedef struct CompandSegment	CompandSegment
typedef struct CompandContext	CompandContext

Functions
	AVFILTER_DEFINE_CLASS (compand)

Variables
AVFilter	ff_af_compand

Detailed Description

audio compand filter

Variable Documentation

ff_af_compand

AVFilter ff_af_compand

Initial value:

= {
    .name           = "compand",
    .description    = NULL_IF_CONFIG_SMALL(
            "Compress or expand audio dynamic range."),
    .query_formats  = query_formats,
    .priv_size      = sizeof(CompandContext),
    .priv_class     = &compand_class,
    .init           = init,
    .uninit         = uninit,
    .inputs         = compand_inputs,
    .outputs        = compand_outputs,
}