Discrete wavelet transform. More...

#include <stdint.h>

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, 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.

Definition in file jpeg2000dwt.h.

Macro Definition Documentation

◆ FF_DWT_MAX_DECLVLS

#define FF_DWT_MAX_DECLVLS 32

max number of decomposition levels

Definition at line 32 of file jpeg2000dwt.h.

Referenced by main().

◆ F_LFTG_K

#define F_LFTG_K 1.230174104914001f

Definition at line 33 of file jpeg2000dwt.h.

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

◆ F_LFTG_X

#define F_LFTG_X 0.812893066115961f

Definition at line 34 of file jpeg2000dwt.h.

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

Enumeration Type Documentation

◆ DWTType

enum DWTType

Enumerator
FF_DWT97
FF_DWT53
FF_DWT97_INT
FF_DWT_NB

Definition at line 36 of file jpeg2000dwt.h.

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

Definition at line 537 of file jpeg2000dwt.c.

Referenced by ff_jpeg2000_init_component(), test_dwt(), and test_dwtf().

◆ ff_dwt_encode()

int ff_dwt_encode	(	DWTContext *	s,
		void *	t
	)

Definition at line 581 of file jpeg2000dwt.c.

Referenced by encode_tile(), test_dwt(), and test_dwtf().

◆ ff_dwt_decode()

int ff_dwt_decode	(	DWTContext *	s,
		void *	t
	)

Definition at line 599 of file jpeg2000dwt.c.

Referenced by test_dwt(), test_dwtf(), and tile_codeblocks().

◆ ff_dwt_destroy()

void ff_dwt_destroy ( DWTContext * s )

Definition at line 620 of file jpeg2000dwt.c.

Referenced by ff_jpeg2000_cleanup(), test_dwt(), and test_dwtf().

Data Structures

Macros

Enumerations

Functions