yading@10: /*
yading@10:  * JPEG2000 tables
yading@10:  * Copyright (c) 2007 Kamil Nowosad
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_J2K_H
yading@10: #define AVCODEC_J2K_H
yading@10: 
yading@10: /**
yading@10:  * JPEG2000 tables
yading@10:  * @file
yading@10:  * @author Kamil Nowosad
yading@10:  */
yading@10: 
yading@10: #include "mqc.h"
yading@10: #include "j2k_dwt.h"
yading@10: 
yading@10: enum J2kMarkers{
yading@10:     J2K_SOC = 0xff4f, ///< start of codestream
yading@10:     J2K_SIZ = 0xff51, ///< image and tile size
yading@10:     J2K_COD,          ///< coding style default
yading@10:     J2K_COC,          ///< coding style component
yading@10:     J2K_TLM = 0xff55, ///< packed packet headers, tile-part header
yading@10:     J2K_PLM = 0xff57, ///< tile-part lengths
yading@10:     J2K_PLT,          ///< packet length, main header
yading@10:     J2K_QCD = 0xff5c, ///< quantization default
yading@10:     J2K_QCC,          ///< quantization component
yading@10:     J2K_RGN,          ///< region of interest
yading@10:     J2K_POC,          ///< progression order change
yading@10:     J2K_PPM,          ///< packet length, tile-part header
yading@10:     J2K_PPT,          ///< packed packet headers, main header
yading@10:     J2K_CRG = 0xff63, ///< component registration
yading@10:     J2K_COM,          ///< comment
yading@10:     J2K_SOT = 0xff90, ///< start of tile-part
yading@10:     J2K_SOP,          ///< start of packet
yading@10:     J2K_EPH,          ///< end of packet header
yading@10:     J2K_SOD,          ///< start of data
yading@10:     J2K_EOC = 0xffd9, ///< end of codestream
yading@10: };
yading@10: 
yading@10: enum J2kQuantsty{ ///< quantization style
yading@10:     J2K_QSTY_NONE, ///< no quantization
yading@10:     J2K_QSTY_SI,   ///< scalar derived
yading@10:     J2K_QSTY_SE    ///< scalar expoounded
yading@10: };
yading@10: 
yading@10: #define J2K_MAX_CBLKW 64
yading@10: #define J2K_MAX_CBLKH 64
yading@10: 
yading@10: // T1 flags
yading@10: // flags determining significance of neighbour coefficients
yading@10: #define J2K_T1_SIG_N  0x0001
yading@10: #define J2K_T1_SIG_E  0x0002
yading@10: #define J2K_T1_SIG_W  0x0004
yading@10: #define J2K_T1_SIG_S  0x0008
yading@10: #define J2K_T1_SIG_NE 0x0010
yading@10: #define J2K_T1_SIG_NW 0x0020
yading@10: #define J2K_T1_SIG_SE 0x0040
yading@10: #define J2K_T1_SIG_SW 0x0080
yading@10: #define J2K_T1_SIG_NB (J2K_T1_SIG_N | J2K_T1_SIG_E | J2K_T1_SIG_S | J2K_T1_SIG_W \
yading@10:                       |J2K_T1_SIG_NE | J2K_T1_SIG_NW | J2K_T1_SIG_SE | J2K_T1_SIG_SW)
yading@10: // flags determining sign bit of neighbour coefficients
yading@10: #define J2K_T1_SGN_N  0x0100
yading@10: #define J2K_T1_SGN_S  0x0200
yading@10: #define J2K_T1_SGN_W  0x0400
yading@10: #define J2K_T1_SGN_E  0x0800
yading@10: 
yading@10: #define J2K_T1_VIS    0x1000
yading@10: #define J2K_T1_SIG    0x2000
yading@10: #define J2K_T1_REF    0x4000
yading@10: 
yading@10: #define J2K_T1_SGN    0x8000
yading@10: 
yading@10: // Codeblock coding styles
yading@10: #define J2K_CBLK_BYPASS    0x01 // Selective arithmetic coding bypass
yading@10: #define J2K_CBLK_RESET     0x02 // Reset context probabilities
yading@10: #define J2K_CBLK_TERMALL   0x04 // Terminate after each coding pass
yading@10: #define J2K_CBLK_VSC       0x08 // Vertical stripe causal context formation
yading@10: #define J2K_CBLK_PREDTERM  0x10 // Predictable termination
yading@10: #define J2K_CBLK_SEGSYM    0x20 // Segmentation symbols present
yading@10: 
yading@10: // Coding styles
yading@10: #define J2K_CSTY_PREC      0x01 // Precincts defined in coding style
yading@10: #define J2K_CSTY_SOP       0x02 // SOP marker present
yading@10: #define J2K_CSTY_EPH       0x04 // EPH marker present
yading@10: 
yading@10: typedef struct {
yading@10:     int data[J2K_MAX_CBLKW][J2K_MAX_CBLKH];
yading@10:     int flags[J2K_MAX_CBLKW+2][J2K_MAX_CBLKH+2];
yading@10:     MqcState mqc;
yading@10: } J2kT1Context;
yading@10: 
yading@10: typedef struct J2kTgtNode {
yading@10:     uint8_t val;
yading@10:     uint8_t vis;
yading@10:     struct J2kTgtNode *parent;
yading@10: } J2kTgtNode;
yading@10: 
yading@10: typedef struct {
yading@10:     uint8_t nreslevels;       ///< number of resolution levels
yading@10:     uint8_t log2_cblk_width,
yading@10:             log2_cblk_height; ///< exponent of codeblock size
yading@10:     uint8_t transform;        ///< DWT type
yading@10:     uint8_t csty;             ///< coding style
yading@10:     uint8_t log2_prec_width,
yading@10:             log2_prec_height; ///< precinct size
yading@10:     uint8_t nlayers;          ///< number of layers
yading@10:     uint8_t mct;              ///< multiple component transformation
yading@10:     uint8_t cblk_style;       ///< codeblock coding style
yading@10: } J2kCodingStyle;
yading@10: 
yading@10: typedef struct {
yading@10:     uint8_t  expn[32 * 3]; ///< quantization exponent
yading@10:     uint16_t mant[32 * 3]; ///< quantization mantissa
yading@10:     uint8_t  quantsty;     ///< quantization style
yading@10:     uint8_t  nguardbits;   ///< number of guard bits
yading@10: } J2kQuantStyle;
yading@10: 
yading@10: typedef struct {
yading@10:     uint16_t rate;
yading@10:     int64_t disto;
yading@10: } J2kPass;
yading@10: 
yading@10: typedef struct {
yading@10:     uint8_t npasses;
yading@10:     uint8_t ninclpasses; ///< number coding of passes included in codestream
yading@10:     uint8_t nonzerobits;
yading@10:     uint16_t length;
yading@10:     uint16_t lengthinc;
yading@10:     uint8_t lblock;
yading@10:     uint8_t zero;
yading@10:     uint8_t data[8192];
yading@10:     J2kPass passes[100];
yading@10: } J2kCblk; ///< code block
yading@10: 
yading@10: typedef struct {
yading@10:     uint16_t xi0, xi1, yi0, yi1; ///< codeblock indexes ([xi0, xi1))
yading@10:     J2kTgtNode *zerobits;
yading@10:     J2kTgtNode *cblkincl;
yading@10: } J2kPrec; ///< precinct
yading@10: 
yading@10: typedef struct {
yading@10:     uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
yading@10:     uint16_t codeblock_width, codeblock_height;
yading@10:     uint16_t cblknx, cblkny;
yading@10:     uint32_t stepsize; ///< quantization stepsize (* 2^13)
yading@10:     J2kPrec *prec;
yading@10:     J2kCblk *cblk;
yading@10: } J2kBand; ///< subband
yading@10: 
yading@10: typedef struct {
yading@10:     uint8_t nbands;
yading@10:     uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
yading@10:     uint16_t num_precincts_x, num_precincts_y; ///< number of precincts in x/y direction
yading@10:     uint8_t log2_prec_width, log2_prec_height; ///< exponent of precinct size
yading@10:     J2kBand *band;
yading@10: } J2kResLevel; ///< resolution level
yading@10: 
yading@10: typedef struct {
yading@10:    J2kResLevel *reslevel;
yading@10:    DWTContext dwt;
yading@10:    int *data;
yading@10:    uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
yading@10: } J2kComponent;
yading@10: 
yading@10: /* debug routines */
yading@10: #if 0
yading@10: #undef fprintf
yading@10: #undef printf
yading@10: void ff_j2k_printv(int *tab, int l);
yading@10: void ff_j2k_printu(uint8_t *tab, int l);
yading@10: #endif
yading@10: 
yading@10: /* misc tools */
yading@10: static inline int ff_j2k_ceildivpow2(int a, int b)
yading@10: {
yading@10:     return (a + (1 << b) - 1)>> b;
yading@10: }
yading@10: 
yading@10: static inline int ff_j2k_ceildiv(int a, int b)
yading@10: {
yading@10:     return (a + b - 1) / b;
yading@10: }
yading@10: 
yading@10: /* tag tree routines */
yading@10: J2kTgtNode *ff_j2k_tag_tree_init(int w, int h);
yading@10: 
yading@10: /* TIER-1 routines */
yading@10: void ff_j2k_init_tier1_luts(void);
yading@10: 
yading@10: void ff_j2k_set_significant(J2kT1Context *t1, int x, int y, int negative);
yading@10: 
yading@10: extern uint8_t ff_j2k_nbctxno_lut[256][4];
yading@10: 
yading@10: static inline int ff_j2k_getnbctxno(int flag, int bandno, int vert_causal_ctx_csty_symbol)
yading@10: {
yading@10:     return ff_j2k_nbctxno_lut[flag&255][bandno];
yading@10: }
yading@10: 
yading@10: static inline int ff_j2k_getrefctxno(int flag)
yading@10: {
yading@10:     static const uint8_t refctxno_lut[2][2] = {{14, 15}, {16, 16}};
yading@10:     return refctxno_lut[(flag>>14)&1][(flag & 255) != 0];
yading@10: }
yading@10: 
yading@10: extern uint8_t ff_j2k_sgnctxno_lut[16][16], ff_j2k_xorbit_lut[16][16];
yading@10: 
yading@10: static inline int ff_j2k_getsgnctxno(int flag, int *xorbit)
yading@10: {
yading@10:     *xorbit = ff_j2k_xorbit_lut[flag&15][(flag>>8)&15];
yading@10:     return  ff_j2k_sgnctxno_lut[flag&15][(flag>>8)&15];
yading@10: }
yading@10: 
yading@10: int ff_j2k_init_component(J2kComponent *comp, J2kCodingStyle *codsty, J2kQuantStyle *qntsty, int cbps, int dx, int dy);
yading@10: void ff_j2k_reinit(J2kComponent *comp, J2kCodingStyle *codsty);
yading@10: void ff_j2k_cleanup(J2kComponent *comp, J2kCodingStyle *codsty);
yading@10: 
yading@10: #endif /* AVCODEC_J2K_H */