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jpeg2000.c File Reference

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/intfloat.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)
 

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.
 
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 )
Value:
((n) >= 0 ? (a) << (n) : (a) >> -(n))
a
int a
Definition h264pred_template.c:416

Definition at line 38 of file jpeg2000.c.

Function Documentation

◆ tag_tree_size()

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 ff_tag_tree_zero().

◆ ff_jpeg2000_tag_tree_init()

static Jpeg2000TgtNode * ff_jpeg2000_tag_tree_init ( int w,
int h )
static

Definition at line 55 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 86 of file jpeg2000.c.

Referenced by encode_packet(), and ff_jpeg2000_reinit().

◆ getsigctxno()

static int getsigctxno ( int flag,
int bandno )
static

Definition at line 99 of file jpeg2000.c.

Referenced by jpeg2000_init_tier1_luts().

◆ getsgnctxno()

static int getsgnctxno ( int flag,
uint8_t * xorbit )
static

Definition at line 148 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 161 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 173 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 179 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 208 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 215 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 275 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 392 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 470 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 580 of file jpeg2000.c.

Referenced by reinit().

◆ ff_jpeg2000_cleanup()

void ff_jpeg2000_cleanup ( Jpeg2000Component * comp,
Jpeg2000CodingStyle * codsty )

Definition at line 601 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 97 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 142 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 142 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 144 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 145 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 146 of file jpeg2000.c.

Referenced by getsgnctxno().

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