jpeg2000.c File Reference

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

Go to the source code of this file.

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)
void	ff_tag_tree_zero (Jpeg2000TgtNode *t, int w, int h, int val)
static int	getsigctxno (int flag, int bandno)
static int	getsgnctxno (int flag, uint8_t *xorbit)
static void av_cold	jpeg2000_init_tier1_luts (void)
void av_cold	ff_jpeg2000_init_tier1_luts (void)
void	ff_jpeg2000_set_significance (Jpeg2000T1Context *t1, int x, int y, int negative)
static av_always_inline float	exp2fi (int x)
	2^(x) for integer x in the range -126..128. More...
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 (AVCodecContext *avctx, Jpeg2000Band *band, Jpeg2000ResLevel *reslevel, Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty, 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, const int cbps, int dx, int dy)
int	ff_jpeg2000_init_component (Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty, Jpeg2000QuantStyle *qntsty, const 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

SHL

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

Definition at line 37 of file jpeg2000.c.

Function Documentation

tag_tree_size()

static int32_t tag_tree_size ( int  w, int  h  )

static

Definition at line 41 of file jpeg2000.c.

Referenced by ff_jpeg2000_tag_tree_init(), and ff_tag_tree_zero().

ff_jpeg2000_tag_tree_init()

static Jpeg2000TgtNode* ff_jpeg2000_tag_tree_init ( int  w, int  h  )

static

Definition at line 54 of file jpeg2000.c.

Referenced by init_prec().

ff_tag_tree_zero()

void ff_tag_tree_zero	(	Jpeg2000TgtNode *	t,
		int	w,
		int	h,
		int	val
	)

Definition at line 85 of file jpeg2000.c.

Referenced by encode_packet(), and ff_jpeg2000_reinit().

getsigctxno()

static int getsigctxno ( int  flag, int  bandno  )

static

Definition at line 98 of file jpeg2000.c.

Referenced by jpeg2000_init_tier1_luts().

getsgnctxno()

static int getsgnctxno ( int  flag, uint8_t *  xorbit  )

static

Definition at line 147 of file jpeg2000.c.

Referenced by jpeg2000_init_tier1_luts().

jpeg2000_init_tier1_luts()

static void av_cold jpeg2000_init_tier1_luts ( void  )

static

Definition at line 160 of file jpeg2000.c.

Referenced by ff_jpeg2000_init_tier1_luts().

ff_jpeg2000_init_tier1_luts()

void av_cold ff_jpeg2000_init_tier1_luts

(

void

)

Definition at line 172 of file jpeg2000.c.

Referenced by init_luts(), and jpeg2000_decode_init().

ff_jpeg2000_set_significance()

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

Definition at line 178 of file jpeg2000.c.

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

exp2fi()

static av_always_inline float exp2fi ( int  x )

static

2^(x) for integer x in the range -126..128.

Returns

correctly rounded float

Definition at line 207 of file jpeg2000.c.

Referenced by init_band_stepsize().

init_band_stepsize()

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 214 of file jpeg2000.c.

Referenced by init_band().

init_prec()

static int init_prec ( AVCodecContext *  avctx, Jpeg2000Band *  band, Jpeg2000ResLevel *  reslevel, Jpeg2000Component *  comp, Jpeg2000CodingStyle *  codsty, int  precno, int  bandno, int  reslevelno, int  log2_band_prec_width, int  log2_band_prec_height  )

static

Definition at line 281 of file jpeg2000.c.

Referenced by init_band().

init_band()

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

static

Definition at line 398 of file jpeg2000.c.

Referenced by ff_jpeg2000_init_component().

ff_jpeg2000_init_component()

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

Definition at line 476 of file jpeg2000.c.

Referenced by init_tile(), and init_tiles().

ff_jpeg2000_reinit()

void ff_jpeg2000_reinit	(	Jpeg2000Component *	comp,
		Jpeg2000CodingStyle *	codsty
	)

Definition at line 586 of file jpeg2000.c.

Referenced by reinit().

ff_jpeg2000_cleanup()

void ff_jpeg2000_cleanup	(	Jpeg2000Component *	comp,
		Jpeg2000CodingStyle *	codsty
	)

Definition at line 607 of file jpeg2000.c.

Referenced by cleanup(), and jpeg2000_dec_cleanup().

Variable Documentation

ff_jpeg2000_sigctxno_lut

uint8_t ff_jpeg2000_sigctxno_lut[256][4]

Definition at line 96 of file jpeg2000.c.

Referenced by ff_jpeg2000_getsigctxno(), and jpeg2000_init_tier1_luts().

ff_jpeg2000_sgnctxno_lut

uint8_t ff_jpeg2000_sgnctxno_lut[16][16]

Definition at line 141 of file jpeg2000.c.

Referenced by ff_jpeg2000_getsgnctxno(), and jpeg2000_init_tier1_luts().

ff_jpeg2000_xorbit_lut

uint8_t ff_jpeg2000_xorbit_lut[16][16]

Definition at line 141 of file jpeg2000.c.

Referenced by ff_jpeg2000_getsgnctxno(), and jpeg2000_init_tier1_luts().

contribtab

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

static

Definition at line 143 of file jpeg2000.c.

Referenced by getsgnctxno().

ctxlbltab

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

static

Definition at line 144 of file jpeg2000.c.

Referenced by getsgnctxno().

xorbittab

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

static

Definition at line 145 of file jpeg2000.c.

Referenced by getsgnctxno().