j2k.c File Reference

JPEG2000 image encoder and decoder common functions. More...

#include "avcodec.h"
#include "j2k.h"

Include dependency graph for j2k.c:

Go to the source code of this file.

Macros
#define	SHL(a, n)   ((n)>=0 ? (a) << (n) : (a) >> -(n))

Functions
static int	tag_tree_size (int w, int h)
	allocate the memory for tag tree More...
J2kTgtNode *	ff_j2k_tag_tree_init (int w, int h)
static void	tag_tree_zero (J2kTgtNode *t, int w, int h)
static int	getnbctxno (int flag, int bandno, int vert_causal_ctx_csty_symbol)
static int	getsgnctxno (int flag, uint8_t *xorbit)
void	ff_j2k_init_tier1_luts (void)
void	ff_j2k_set_significant (J2kT1Context *t1, int x, int y, int negative)
int	ff_j2k_init_component (J2kComponent *comp, J2kCodingStyle *codsty, J2kQuantStyle *qntsty, int cbps, int dx, int dy)
void	ff_j2k_reinit (J2kComponent *comp, J2kCodingStyle *codsty)
void	ff_j2k_cleanup (J2kComponent *comp, J2kCodingStyle *codsty)

Variables
uint8_t	ff_j2k_nbctxno_lut [256][4]
uint8_t	ff_j2k_sgnctxno_lut [16][16]
uint8_t	ff_j2k_xorbit_lut [16][16]

Detailed Description

JPEG2000 image encoder and decoder common functions.

Author

Kamil Nowosad

Definition in file j2k.c.

Macro Definition Documentation

#define SHL	(		a,
			n
	)		((n)>=0 ? (a) << (n) : (a) >> -(n))

Definition at line 32 of file j2k.c.

Referenced by ff_j2k_init_component().

Function Documentation

void ff_j2k_cleanup	(	J2kComponent *	comp,
		J2kCodingStyle *	codsty
	)

Definition at line 369 of file j2k.c.

Referenced by cleanup(), and ff_j2k_getsgnctxno().

int ff_j2k_init_component	(	J2kComponent *	comp,
		J2kCodingStyle *	codsty,
		J2kQuantStyle *	qntsty,
		int	cbps,
		int	dx,
		int	dy
	)

Definition at line 202 of file j2k.c.

Referenced by ff_j2k_getsgnctxno(), init_tile(), and init_tiles().

void ff_j2k_init_tier1_luts

(

void

)

Definition at line 170 of file j2k.c.

Referenced by ff_j2k_ceildiv(), j2kdec_init(), and j2kenc_init().

void ff_j2k_reinit	(	J2kComponent *	comp,
		J2kCodingStyle *	codsty
	)

Definition at line 348 of file j2k.c.

Referenced by ff_j2k_getsgnctxno(), and reinit().

void ff_j2k_set_significant	(	J2kT1Context *	t1,
		int	x,
		int	y,
		int	negative
	)

Definition at line 181 of file j2k.c.

Referenced by decode_clnpass(), decode_sigpass(), encode_clnpass(), encode_sigpass(), and ff_j2k_ceildiv().

J2kTgtNode* ff_j2k_tag_tree_init	(	int	w,
		int	h
	)

Definition at line 67 of file j2k.c.

Referenced by ff_j2k_ceildiv(), and ff_j2k_init_component().

static int getnbctxno ( int  flag, int  bandno, int  vert_causal_ctx_csty_symbol  )

static

Definition at line 108 of file j2k.c.

Referenced by ff_j2k_init_tier1_luts().

static int getsgnctxno ( int  flag, uint8_t *  xorbit  )

static

Definition at line 155 of file j2k.c.

Referenced by ff_j2k_init_tier1_luts().

static int tag_tree_size ( int  w, int  h  )

static

allocate the memory for tag tree

Definition at line 56 of file j2k.c.

Referenced by ff_j2k_tag_tree_init(), and tag_tree_zero().

static void tag_tree_zero ( J2kTgtNode *  t, int  w, int  h  )

static

Definition at line 96 of file j2k.c.

Referenced by ff_j2k_reinit().

Variable Documentation

uint8_t ff_j2k_nbctxno_lut[256][4]

Definition at line 106 of file j2k.c.

Referenced by ff_j2k_ceildiv(), ff_j2k_getnbctxno(), and ff_j2k_init_tier1_luts().

uint8_t ff_j2k_sgnctxno_lut[16][16]

Definition at line 153 of file j2k.c.

Referenced by ff_j2k_getrefctxno(), ff_j2k_getsgnctxno(), and ff_j2k_init_tier1_luts().

uint8_t ff_j2k_xorbit_lut[16][16]

Definition at line 153 of file j2k.c.

Referenced by ff_j2k_getrefctxno(), ff_j2k_getsgnctxno(), and ff_j2k_init_tier1_luts().