FFmpeg: libavcodec/j2k_dwt.c File Reference

Discrete wavelet transform. More...

#include "j2k_dwt.h"

Go to the source code of this file.

Functions
static void	extend53 (int *p, int i0, int i1)

static void	extend97 (float *p, int i0, int i1)

static void	sd_1d53 (int *p, int i0, int i1)

static void	dwt_encode53 (DWTContext s, int t)

static void	sd_1d97 (float *p, int i0, int i1)

static void	dwt_encode97 (DWTContext s, int t)

static void	sr_1d53 (int *p, int i0, int i1)

static void	dwt_decode53 (DWTContext s, int t)

static void	sr_1d97 (float *p, int i0, int i1)

static void	dwt_decode97 (DWTContext s, int t)

int	ff_j2k_dwt_init (DWTContext *s, uint16_t border[2][2], int decomp_levels, int type)
	initialize DWT

int	ff_j2k_dwt_encode (DWTContext s, int t)

int	ff_j2k_dwt_decode (DWTContext s, int t)

void	ff_j2k_dwt_destroy (DWTContext *s)

Variables
static const float	scale97 [] = {1.625786, 1.230174}

Detailed Description

Discrete wavelet transform.

Author: Kamil Nowosad

Definition in file j2k_dwt.c.

Function Documentation

static void extend53	(	int *	p,
		int	i0,
		int	i1
	)

inlinestatic

Definition at line 32 of file j2k_dwt.c.

Referenced by sd_1d53(), and sr_1d53().

static void extend97	(	float *	p,
		int	i0,
		int	i1
	)

inlinestatic

Definition at line 40 of file j2k_dwt.c.

Referenced by sd_1d97(), and sr_1d97().

static void sd_1d53	(	int *	p,
		int	i0,
		int	i1
	)

static

Definition at line 50 of file j2k_dwt.c.

Referenced by dwt_encode53().

static void dwt_encode53	(	DWTContext *	s,
		int *	t
	)

static

Definition at line 65 of file j2k_dwt.c.

Referenced by ff_j2k_dwt_encode().

static void sd_1d97	(	float *	p,
		int	i0,
		int	i1
	)

static

Definition at line 116 of file j2k_dwt.c.

Referenced by dwt_encode97().

static void dwt_encode97	(	DWTContext *	s,
		int *	t
	)

static

Definition at line 136 of file j2k_dwt.c.

Referenced by ff_j2k_dwt_encode().

static void sr_1d53	(	int *	p,
		int	i0,
		int	i1
	)

static

Definition at line 187 of file j2k_dwt.c.

Referenced by dwt_decode53().

static void dwt_decode53	(	DWTContext *	s,
		int *	t
	)

static

Definition at line 202 of file j2k_dwt.c.

Referenced by ff_j2k_dwt_decode().

static void sr_1d97	(	float *	p,
		int	i0,
		int	i1
	)

static

Definition at line 251 of file j2k_dwt.c.

Referenced by dwt_decode97().

static void dwt_decode97	(	DWTContext *	s,
		int *	t
	)

static

Definition at line 270 of file j2k_dwt.c.

Referenced by ff_j2k_dwt_decode().

int ff_j2k_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 319 of file j2k_dwt.c.

Referenced by ff_j2k_init_component().

int ff_j2k_dwt_encode	(	DWTContext *	s,
		int *	t
	)

Definition at line 357 of file j2k_dwt.c.

Referenced by encode_tile().

int ff_j2k_dwt_decode	(	DWTContext *	s,
		int *	t
	)

Definition at line 370 of file j2k_dwt.c.

Referenced by decode_tile().

void ff_j2k_dwt_destroy ( DWTContext * s )

Definition at line 383 of file j2k_dwt.c.

Referenced by ff_j2k_cleanup().

Variable Documentation

const float scale97[] = {1.625786, 1.230174}

static

Definition at line 30 of file j2k_dwt.c.

Referenced by dwt_decode97(), and dwt_encode97().