jpeg2000dwt.c File Reference

Discrete wavelet transform. More...

#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "jpeg2000dwt.h"
#include "internal.h"

Macros
#define	F_LFTG_ALPHA   1.586134342059924f
#define	F_LFTG_BETA   0.052980118572961f
#define	F_LFTG_GAMMA   0.882911075530934f
#define	F_LFTG_DELTA   0.443506852043971f
#define	I_LFTG_ALPHA   103949ll
#define	I_LFTG_BETA   3472ll
#define	I_LFTG_GAMMA   57862ll
#define	I_LFTG_DELTA   29066ll
#define	I_LFTG_K   80621ll
#define	I_LFTG_X   53274ll
#define	I_PRESHIFT   8

Functions
int	ff_jpeg2000_dwt_init (DWTContext *s, int border[2][2], int decomp_levels, int type)
	Initialize DWT. More...
int	ff_dwt_encode (DWTContext *s, void *t)
int	ff_dwt_decode (DWTContext *s, void *t)
void	ff_dwt_destroy (DWTContext *s)

Detailed Description

Discrete wavelet transform.

Function Documentation

ff_jpeg2000_dwt_init()

int ff_jpeg2000_dwt_init	(	DWTContext *	s,
		int	border[2][2],
		int	decomp_levels,
		int	type
	)

Initialize DWT.

Parameters

s	DWT context
border	coordinates of transformed region {{x0, x1}, {y0, y1}}
decomp_levels	number of decomposition levels
type	0 for DWT 9/7; 1 for DWT 5/3