jpeg2000dwt.h File Reference

Discrete wavelet transform. More...

#include <stdint.h>

Go to the source code of this file.

Classes
struct	DWTContext

Macros
#define	FF_DWT_MAX_DECLVLS   32
	max number of decomposition levels
#define	F_LFTG_K   1.230174104914001f
#define	F_LFTG_X   0.812893066115961f

Typedefs
typedef struct DWTContext	DWTContext

Enumerations
enum	DWTType { FF_DWT97, FF_DWT53, FF_DWT97_INT, FF_DWT_NB }

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