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

#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "internal.h"
#include "jpeg2000.h"

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

Functions
static int32_t	tag_tree_size (int w, int h)

static Jpeg2000TgtNode *	ff_jpeg2000_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 av_cold	ff_jpeg2000_init_tier1_luts (void)

void	ff_jpeg2000_set_significance (Jpeg2000T1Context *t1, int x, int y, int negative)

static void	init_band_stepsize (AVCodecContext avctx, Jpeg2000Band band, Jpeg2000CodingStyle codsty, Jpeg2000QuantStyle qntsty, int bandno, int gbandno, int reslevelno, int cbps)

static int	init_prec (Jpeg2000Band band, Jpeg2000ResLevel reslevel, Jpeg2000Component *comp, int precno, int bandno, int reslevelno, int log2_band_prec_width, int log2_band_prec_height)

static int	init_band (AVCodecContext avctx, Jpeg2000ResLevel reslevel, Jpeg2000Component comp, Jpeg2000CodingStyle codsty, Jpeg2000QuantStyle *qntsty, int bandno, int gbandno, int reslevelno, int cbps, int dx, int dy)

int	ff_jpeg2000_init_component (Jpeg2000Component comp, Jpeg2000CodingStyle codsty, Jpeg2000QuantStyle qntsty, int cbps, int dx, int dy, AVCodecContext avctx)

void	ff_jpeg2000_reinit (Jpeg2000Component comp, Jpeg2000CodingStyle codsty)

void	ff_jpeg2000_cleanup (Jpeg2000Component comp, Jpeg2000CodingStyle codsty)

Variables
uint8_t	ff_jpeg2000_sigctxno_lut [256][4]

uint8_t	ff_jpeg2000_sgnctxno_lut [16][16]

uint8_t	ff_jpeg2000_xorbit_lut [16][16]

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 } }

Detailed Description

JPEG 2000 image encoder and decoder common functions.

Definition in file jpeg2000.c.

Macro Definition Documentation

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

Definition at line 37 of file jpeg2000.c.

Function Documentation

static int32_t tag_tree_size	(	int	w,
		int	h
	)

static

Definition at line 42 of file jpeg2000.c.

Referenced by ff_jpeg2000_tag_tree_init(), and tag_tree_zero().

static Jpeg2000TgtNode* ff_jpeg2000_tag_tree_init	(	int	w,
		int	h
	)

static

Definition at line 54 of file jpeg2000.c.

Referenced by init_prec().

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

static

Definition at line 85 of file jpeg2000.c.

Referenced by ff_jpeg2000_reinit().

static int getsigctxno	(	int	flag,
		int	bandno
	)

static

Definition at line 97 of file jpeg2000.c.

Referenced by ff_jpeg2000_init_tier1_luts().

static int getsgnctxno	(	int	flag,
		uint8_t *	xorbit
	)

static

Definition at line 146 of file jpeg2000.c.

Referenced by ff_jpeg2000_init_tier1_luts().

void av_cold ff_jpeg2000_init_tier1_luts ( void )

Definition at line 159 of file jpeg2000.c.

Referenced by j2kenc_init(), and jpeg2000_init_static_data().

void ff_jpeg2000_set_significance	(	Jpeg2000T1Context *	t1,
		int	x,
		int	y,
		int	negative
	)

Definition at line 171 of file jpeg2000.c.

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

static void init_band_stepsize	(	AVCodecContext *	avctx,
		Jpeg2000Band *	band,
		Jpeg2000CodingStyle *	codsty,
		Jpeg2000QuantStyle *	qntsty,
		int	bandno,
		int	gbandno,
		int	reslevelno,
		int	cbps
	)

static

Definition at line 196 of file jpeg2000.c.

Referenced by init_band().

static int init_prec	(	Jpeg2000Band *	band,
		Jpeg2000ResLevel *	reslevel,
		Jpeg2000Component *	comp,
		int	precno,
		int	bandno,
		int	reslevelno,
		int	log2_band_prec_width,
		int	log2_band_prec_height
	)

static

Definition at line 258 of file jpeg2000.c.

Referenced by init_band().

static int init_band	(	AVCodecContext *	avctx,
		Jpeg2000ResLevel *	reslevel,
		Jpeg2000Component *	comp,
		Jpeg2000CodingStyle *	codsty,
		Jpeg2000QuantStyle *	qntsty,
		int	bandno,
		int	gbandno,
		int	reslevelno,
		int	cbps,
		int	dx,
		int	dy
	)

static

Definition at line 370 of file jpeg2000.c.

Referenced by ff_jpeg2000_init_component().

int ff_jpeg2000_init_component	(	Jpeg2000Component *	comp,
		Jpeg2000CodingStyle *	codsty,
		Jpeg2000QuantStyle *	qntsty,
		int	cbps,
		int	dx,
		int	dy,
		AVCodecContext *	avctx
	)