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/*
* JPEG2000 tables
* Copyright (c) 2007 Kamil Nowosad
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_J2K_H
#define AVCODEC_J2K_H
/**
* JPEG2000 tables
* @file
* @author Kamil Nowosad
*/
#include "mqc.h"
#include "j2k_dwt.h"
enum Jpeg2000Markers{
JPEG2000_SOC = 0xff4f, ///< start of codestream
JPEG2000_SIZ = 0xff51, ///< image and tile size
JPEG2000_COD, ///< coding style default
JPEG2000_COC, ///< coding style component
JPEG2000_TLM = 0xff55, ///< packed packet headers, tile-part header
JPEG2000_PLM = 0xff57, ///< tile-part lengths
JPEG2000_PLT, ///< packet length, main header
JPEG2000_QCD = 0xff5c, ///< quantization default
JPEG2000_QCC, ///< quantization component
JPEG2000_RGN, ///< region of interest
JPEG2000_POC, ///< progression order change
JPEG2000_PPM, ///< packet length, tile-part header
JPEG2000_PPT, ///< packed packet headers, main header
JPEG2000_CRG = 0xff63, ///< component registration
JPEG2000_COM, ///< comment
JPEG2000_SOT = 0xff90, ///< start of tile-part
JPEG2000_SOP, ///< start of packet
JPEG2000_EPH, ///< end of packet header
JPEG2000_SOD, ///< start of data
JPEG2000_EOC = 0xffd9, ///< end of codestream
};
enum Jpeg2000Quantsty{ ///< quantization style
JPEG2000_QSTY_NONE, ///< no quantization
JPEG2000_QSTY_SI, ///< scalar derived
JPEG2000_QSTY_SE ///< scalar expoounded
};
#define JPEG2000_MAX_CBLKW 64
#define JPEG2000_MAX_CBLKH 64
#define JPEG2000_MAX_RESLEVELS 33
// T1 flags
// flags determining significance of neighbour coefficients
#define JPEG2000_T1_SIG_N 0x0001
#define JPEG2000_T1_SIG_E 0x0002
#define JPEG2000_T1_SIG_W 0x0004
#define JPEG2000_T1_SIG_S 0x0008
#define JPEG2000_T1_SIG_NE 0x0010
#define JPEG2000_T1_SIG_NW 0x0020
#define JPEG2000_T1_SIG_SE 0x0040
#define JPEG2000_T1_SIG_SW 0x0080
#define JPEG2000_T1_SIG_NB (JPEG2000_T1_SIG_N | JPEG2000_T1_SIG_E | JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_W \
|JPEG2000_T1_SIG_NE | JPEG2000_T1_SIG_NW | JPEG2000_T1_SIG_SE | JPEG2000_T1_SIG_SW)
// flags determining sign bit of neighbour coefficients
#define JPEG2000_T1_SGN_N 0x0100
#define JPEG2000_T1_SGN_S 0x0200
#define JPEG2000_T1_SGN_W 0x0400
#define JPEG2000_T1_SGN_E 0x0800
#define JPEG2000_T1_VIS 0x1000
#define JPEG2000_T1_SIG 0x2000
#define JPEG2000_T1_REF 0x4000
#define JPEG2000_T1_SGN 0x8000
// Codeblock coding styles
#define JPEG2000_CBLK_BYPASS 0x01 // Selective arithmetic coding bypass
#define JPEG2000_CBLK_RESET 0x02 // Reset context probabilities
#define JPEG2000_CBLK_TERMALL 0x04 // Terminate after each coding pass
#define JPEG2000_CBLK_VSC 0x08 // Vertical stripe causal context formation
#define JPEG2000_CBLK_PREDTERM 0x10 // Predictable termination
#define JPEG2000_CBLK_SEGSYM 0x20 // Segmentation symbols present
// Coding styles
#define JPEG2000_CSTY_PREC 0x01 // Precincts defined in coding style
#define JPEG2000_CSTY_SOP 0x02 // SOP marker present
#define JPEG2000_CSTY_EPH 0x04 // EPH marker present
typedef struct {
int data[JPEG2000_MAX_CBLKW][JPEG2000_MAX_CBLKH];
int flags[JPEG2000_MAX_CBLKW+2][JPEG2000_MAX_CBLKH+2];
MqcState mqc;
} Jpeg2000T1Context;
typedef struct Jpeg2000TgtNode {
uint8_t val;
uint8_t vis;
struct Jpeg2000TgtNode *parent;
} Jpeg2000TgtNode;
typedef struct Jpeg2000CodingStyle {
uint8_t nreslevels; // number of resolution levels
uint8_t log2_cblk_width,
log2_cblk_height; // exponent of codeblock size
uint8_t transform; // DWT type
uint8_t csty; // coding style
uint8_t log2_prec_width,
log2_prec_height; // precinct size
uint8_t nlayers; // number of layers
uint8_t mct; // multiple component transformation
uint8_t cblk_style; // codeblock coding style
uint8_t prog_order; // progression order
uint8_t log2_prec_widths[JPEG2000_MAX_RESLEVELS]; // precincts size according resolution levels
uint8_t log2_prec_heights[JPEG2000_MAX_RESLEVELS]; // TODO: initialize prec_size array with 0?
} Jpeg2000CodingStyle;
typedef struct {
uint8_t expn[32 * 3]; ///< quantization exponent
uint16_t mant[32 * 3]; ///< quantization mantissa
uint8_t quantsty; ///< quantization style
uint8_t nguardbits; ///< number of guard bits
} Jpeg2000QuantStyle;
typedef struct {
uint16_t rate;
int64_t disto;
} Jpeg2000Pass;
typedef struct {
uint8_t npasses;
uint8_t ninclpasses; ///< number coding of passes included in codestream
uint8_t nonzerobits;
uint16_t length;
uint16_t lengthinc;
uint8_t lblock;
uint8_t zero;
uint8_t data[8192];
Jpeg2000Pass passes[100];
} Jpeg2000Cblk; ///< code block
typedef struct {
uint16_t xi0, xi1, yi0, yi1; ///< codeblock indexes ([xi0, xi1))
Jpeg2000TgtNode *zerobits;
Jpeg2000TgtNode *cblkincl;
} Jpeg2000Prec; ///< precinct
typedef struct {
uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
uint16_t codeblock_width, codeblock_height;
uint16_t cblknx, cblkny;
uint32_t stepsize; ///< quantization stepsize (* 2^13)
Jpeg2000Prec *prec;
Jpeg2000Cblk *cblk;
} Jpeg2000Band; ///< subband
typedef struct {
uint8_t nbands;
uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
uint16_t num_precincts_x, num_precincts_y; ///< number of precincts in x/y direction
uint8_t log2_prec_width, log2_prec_height; ///< exponent of precinct size
Jpeg2000Band *band;
} Jpeg2000ResLevel; ///< resolution level
typedef struct {
Jpeg2000ResLevel *reslevel;
DWTContext dwt;
int *data;
uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
} Jpeg2000Component;
/* debug routines */
#if 0
#undef fprintf
#undef printf
void ff_j2k_printv(int *tab, int l);
void ff_j2k_printu(uint8_t *tab, int l);
#endif
/* misc tools */
static inline int ff_jpeg2000_ceildivpow2(int a, int b)
{
return (a + (1 << b) - 1)>> b;
}
static inline int ff_jpeg2000_ceildiv(int a, int b)
{
return (a + b - 1) / b;
}
/* tag tree routines */
Jpeg2000TgtNode *ff_j2k_tag_tree_init(int w, int h);
/* TIER-1 routines */
void ff_jpeg2000_init_tier1_luts(void);
void ff_j2k_set_significant(Jpeg2000T1Context *t1, int x, int y, int negative);
extern uint8_t ff_jpeg2000_sigctxno_lut[256][4];
static inline int ff_j2k_getsigctxno(int flag, int bandno)
{
return ff_jpeg2000_sigctxno_lut[flag&255][bandno];
}
/* Get context label (number in range[14..16]) of a coefficient for magnitude
* refinement pass. */
static inline int ff_jpeg2000_getrefctxno(int flag)
{
static const uint8_t refctxno_lut[2][2] = { { 14, 15 }, { 16, 16 } };
return refctxno_lut[(flag>>14)&1][(flag & 255) != 0];
}
extern uint8_t ff_jpeg2000_sgnctxno_lut[16][16];
extern uint8_t ff_jpeg2000_xorbit_lut[16][16];
/* Get context label (number in range[9..13]) for sign decoding. */
static inline int ff_jpeg2000_getsgnctxno(int flag, int *xorbit)
{
*xorbit = ff_jpeg2000_xorbit_lut[flag&15][(flag>>8)&15];
return ff_jpeg2000_sgnctxno_lut[flag&15][(flag>>8)&15];
}
int ff_j2k_init_component(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty, Jpeg2000QuantStyle *qntsty, int cbps, int dx, int dy);
void ff_j2k_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty);
void ff_j2k_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty);
#endif /* AVCODEC_J2K_H */
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