j2k.c File Reference

JPEG 2000 image encoder and decoder common functions. More...

#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "j2k.h"

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)
Jpeg2000TgtNode *	ff_j2k_tag_tree_init (int w, int h)
static void	tag_tree_zero (Jpeg2000TgtNode *t, int w, int h)
static int	getsigctxno (int flag, int bandno)
static int	getsgnctxno (int flag, uint8_t *xorbit)
void	ff_j2k_set_significant (Jpeg2000T1Context *t1, int x, int y, int negative)
int	ff_j2k_init_component (Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty, Jpeg2000QuantStyle *qntsty, int cbps, int dx, int dy, AVCodecContext *avctx)
void	ff_j2k_reinit (Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
void	ff_j2k_cleanup (Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)

Variables
static const int	contribtab [3][3] = { { 0, -1, 1 }, { -1, -1, 0 }, { 1, 0, 1 } }
static const int	ctxlbltab [3][3] = { { 13, 12, 11 }, { 10, 9, 10 }, { 11, 12, 13 } }
static const int	xorbittab [3][3] = { { 1, 1, 1 }, { 1, 0, 0 }, { 0, 0, 0 } }
static const uint8_t	lut_gain [2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } }

Detailed Description

JPEG 2000 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 35 of file j2k.c.

Referenced by ff_j2k_init_component().

Function Documentation

static int tag_tree_size ( int  w, int  h  )

static

Definition at line 40 of file j2k.c.

Referenced by ff_j2k_tag_tree_init(), and tag_tree_zero().

Jpeg2000TgtNode* ff_j2k_tag_tree_init	(	int	w,
		int	h
	)

Definition at line 51 of file j2k.c.

Referenced by ff_j2k_init_component().

static void tag_tree_zero ( Jpeg2000TgtNode *  t, int  w, int  h  )

static

Definition at line 82 of file j2k.c.

Referenced by ff_j2k_reinit().

static int getsigctxno ( int  flag, int  bandno  )

static

Definition at line 92 of file j2k.c.

static int getsgnctxno ( int  flag, uint8_t *  xorbit  )

static

Definition at line 140 of file j2k.c.

void ff_j2k_set_significant	(	Jpeg2000T1Context *	t1,
		int	x,
		int	y,
		int	negative
	)

Definition at line 153 of file j2k.c.

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

int ff_j2k_init_component	(	Jpeg2000Component *	comp,
		Jpeg2000CodingStyle *	codsty,
		Jpeg2000QuantStyle *	qntsty,
		int	cbps,
		int	dx,
		int	dy,
		AVCodecContext *	avctx
	)

Definition at line 178 of file j2k.c.

Referenced by init_tile(), and init_tiles().

void ff_j2k_reinit	(	Jpeg2000Component *	comp,
		Jpeg2000CodingStyle *	codsty
	)

Definition at line 444 of file j2k.c.

Referenced by reinit().

void ff_j2k_cleanup	(	Jpeg2000Component *	comp,
		Jpeg2000CodingStyle *	codsty
	)

Definition at line 465 of file j2k.c.

Referenced by cleanup(), and jpeg2000_dec_cleanup().

Variable Documentation

const int contribtab[3][3] = { { 0, -1, 1 }, { -1, -1, 0 }, { 1, 0, 1 } }

static

Definition at line 136 of file j2k.c.

Referenced by getsgnctxno().

const int ctxlbltab[3][3] = { { 13, 12, 11 }, { 10, 9, 10 }, { 11, 12, 13 } }

static

Definition at line 137 of file j2k.c.

Referenced by getsgnctxno().

const int xorbittab[3][3] = { { 1, 1, 1 }, { 1, 0, 0 }, { 0, 0, 0 } }

static

Definition at line 138 of file j2k.c.

Referenced by getsgnctxno().

const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } }

static

Definition at line 176 of file j2k.c.

Referenced by ff_j2k_init_component().