FFmpeg
Data Structures | Macros | Enumerations | Functions
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, 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

#define FF_DWT_MAX_DECLVLS   32

max number of decomposition levels

Definition at line 32 of file jpeg2000dwt.h.

Referenced by main().

#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().

#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

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,
int  border[2][2],
int  decomp_levels,
int  type 
)

Initialize DWT.

Parameters
sDWT context
bordercoordinates of transformed region {{x0, x1}, {y0, y1}}
decomp_levelsnumber of decomposition levels
type0 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().

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().

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().

void ff_dwt_destroy ( DWTContext s)

Definition at line 620 of file jpeg2000dwt.c.

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