jpeg2000.h 9.39 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69
/*
 * JPEG 2000 common defines, structures and functions
 * Copyright (c) 2007 Kamil Nowosad
 * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
 *
 * This file is part of Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCODEC_JPEG2000_H
#define AVCODEC_JPEG2000_H

/**
 * @file
 * JPEG 2000 structures and defines common
 * to encoder and decoder
 */

#include <stdint.h>

#include "avcodec.h"
#include "mqc.h"
#include "jpeg2000dwt.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 expounded
};

#define JPEG2000_MAX_CBLKW 64
#define JPEG2000_MAX_CBLKH 64

70 71 72

#define JPEG2000_MAX_DECLEVELS 32
#define JPEG2000_MAX_RESLEVELS (JPEG2000_MAX_DECLEVELS + 1)
73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147

// T1 flags
// flags determining significance of neighbor 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 neighbor 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

// Progression orders
#define JPEG2000_PGOD_LRCP      0x00  // Layer-resolution level-component-position progression
#define JPEG2000_PGOD_RLCP      0x01  // Resolution level-layer-component-position progression
#define JPEG2000_PGOD_RPCL      0x02  // Resolution level-position-component-layer progression
#define JPEG2000_PGOD_PCRL      0x03  // Position-component-resolution level-layer progression
#define JPEG2000_PGOD_CPRL      0x04  // Component-position-resolution level-layer progression

typedef struct Jpeg2000T1Context {
    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 nreslevels2decode; // number of resolution levels to decode
    uint8_t log2_cblk_width,
            log2_cblk_height; // exponent of codeblock size
    uint8_t transform;        // DWT type
    uint8_t csty;             // coding style
    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 Jpeg2000QuantStyle {
148 149
    uint8_t expn[JPEG2000_MAX_DECLEVELS * 3];  // quantization exponent
    uint32_t mant[JPEG2000_MAX_DECLEVELS * 3]; // quantization mantissa
150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177
    uint8_t quantsty;      // quantization style
    uint8_t nguardbits;    // number of guard bits
} Jpeg2000QuantStyle;

typedef struct Jpeg2000Cblk {
    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];
    uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
} Jpeg2000Cblk; // code block

typedef struct Jpeg2000Prec {
    uint16_t nb_codeblocks_width;
    uint16_t nb_codeblocks_height;
    Jpeg2000TgtNode *zerobits;
    Jpeg2000TgtNode *cblkincl;
    Jpeg2000Cblk *cblk;
    uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
} Jpeg2000Prec; // precinct

typedef struct Jpeg2000Band {
    uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
    uint16_t log2_cblk_width, log2_cblk_height;
178 179
    int i_stepsize; // quantization stepsize
    float f_stepsize; // quantization stepsize
180 181 182 183 184 185 186 187 188 189 190 191 192 193
    Jpeg2000Prec *prec;
} Jpeg2000Band; // subband

typedef struct Jpeg2000ResLevel {
    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 Jpeg2000Component {
    Jpeg2000ResLevel *reslevel;
    DWTContext dwt;
194 195
    float *f_data;
    int *i_data;
196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257
    uint16_t coord[2][2];   // border coordinates {{x0, x1}, {y0, y1}} -- can be reduced with lowres option
    uint16_t coord_o[2][2]; // border coordinates {{x0, x1}, {y0, y1}} -- original values from jpeg2000 headers
} Jpeg2000Component;

/* 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;
}

/* TIER-1 routines */

/* Set up lookup tables used in TIER-1. */
void ff_jpeg2000_init_tier1_luts(void);

/* Update significance of a coefficient at current position (x,y) and
 * for neighbors. */
void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1,
                                  int x, int y, int negative);

extern uint8_t ff_jpeg2000_sigctxno_lut[256][4];

/* Get context label (number in range[0..8]) of a coefficient for significance
 * propagation and cleanup coding passes. */
static inline int ff_jpeg2000_getsigctxno(int flag, int bandno)
{
    return ff_jpeg2000_sigctxno_lut[flag & 255][bandno];
}

static const uint8_t refctxno_lut[2][2] = { { 14, 15 }, { 16, 16 } };

/* Get context label (number in range[14..16]) of a coefficient for magnitude
 * refinement pass. */
static inline int ff_jpeg2000_getrefctxno(int flag)
{
    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_jpeg2000_init_component(Jpeg2000Component *comp,
                               Jpeg2000CodingStyle *codsty,
                               Jpeg2000QuantStyle *qntsty,
                               int cbps, int dx, int dy,
                               AVCodecContext *ctx);

void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty);

#endif /* AVCODEC_JPEG2000_H */