jpeg2000dwt.h File Reference

Discrete wavelet transform. More...

#include <stdint.h>

Go to the source code of this file.

Data Structures
struct	DWTContext

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

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

Functions
int	ff_jpeg2000_dwt_init (DWTContext *s, uint16_t 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.

Definition in file jpeg2000dwt.h.

Macro Definition Documentation

#define FF_DWT_MAX_DECLVLS   32

max number of decomposition levels

Definition at line 32 of file jpeg2000dwt.h.

#define F_LFTG_K   1.230174104914001f

Definition at line 33 of file jpeg2000dwt.h.

Referenced by ff_jpeg2000_init_component(), sd_1d97_float(), and sr_1d97_float().

#define F_LFTG_X   0.812893066115961f

Definition at line 34 of file jpeg2000dwt.h.

Referenced by ff_jpeg2000_init_component(), sd_1d97_float(), and sr_1d97_float().

Enumeration Type Documentation

enum DWTType

Enumerator
FF_DWT97
FF_DWT53
FF_DWT97_INT
FF_DWT_NB

Definition at line 36 of file jpeg2000dwt.h.

Function Documentation

int ff_jpeg2000_dwt_init	(	DWTContext *	s,
		uint16_t	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

Definition at line 537 of file jpeg2000dwt.c.

Referenced by ff_jpeg2000_init_component().

int ff_dwt_encode	(	DWTContext *	s,
		void *	t
	)

Definition at line 581 of file jpeg2000dwt.c.

Referenced by encode_tile().

int ff_dwt_decode	(	DWTContext *	s,
		void *	t
	)

Definition at line 596 of file jpeg2000dwt.c.

Referenced by jpeg2000_decode_tile().

void ff_dwt_destroy

(

DWTContext *

s

)

Definition at line 614 of file jpeg2000dwt.c.

Referenced by ff_jpeg2000_cleanup().