aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/j2k.h
blob: 85d5cd079cc64a4fa55d2c068d9216263469c7d0 (plain) (blame)
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
70
71
72
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
148
149
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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
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
/*
 * 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 J2kMarkers{
    J2K_SOC = 0xff4f, ///< start of codestream
    J2K_SIZ = 0xff51, ///< image and tile size
    J2K_COD,          ///< coding style default
    J2K_COC,          ///< coding style component
    J2K_TLM = 0xff55, ///< packed packet headers, tile-part header
    J2K_PLM = 0xff57, ///< tile-part lengths
    J2K_PLT,          ///< packet length, main header
    J2K_QCD = 0xff5c, ///< quantization default
    J2K_QCC,          ///< quantization component
    J2K_RGN,          ///< region of interest
    J2K_POC,          ///< progression order change
    J2K_PPM,          ///< packet length, tile-part header
    J2K_PPT,          ///< packed packet headers, main header
    J2K_CRG = 0xff63, ///< component registration
    J2K_COM,          ///< comment
    J2K_SOT = 0xff90, ///< start of tile-part
    J2K_SOP,          ///< start of packet
    J2K_EPH,          ///< end of packet header
    J2K_SOD,          ///< start of data
    J2K_EOC = 0xffd9, ///< end of codestream
};

enum J2kQuantsty{ ///< quantization style
    J2K_QSTY_NONE, ///< no quantization
    J2K_QSTY_SI,   ///< scalar derived
    J2K_QSTY_SE    ///< scalar expoounded
};

#define J2K_MAX_CBLKW 64
#define J2K_MAX_CBLKH 64

// T1 flags
// flags determining significance of neighbour coefficients
#define J2K_T1_SIG_N  0x0001
#define J2K_T1_SIG_E  0x0002
#define J2K_T1_SIG_W  0x0004
#define J2K_T1_SIG_S  0x0008
#define J2K_T1_SIG_NE 0x0010
#define J2K_T1_SIG_NW 0x0020
#define J2K_T1_SIG_SE 0x0040
#define J2K_T1_SIG_SW 0x0080
#define J2K_T1_SIG_NB (J2K_T1_SIG_N | J2K_T1_SIG_E | J2K_T1_SIG_S | J2K_T1_SIG_W \
                      |J2K_T1_SIG_NE | J2K_T1_SIG_NW | J2K_T1_SIG_SE | J2K_T1_SIG_SW)
// flags determining sign bit of neighbour coefficients
#define J2K_T1_SGN_N  0x0100
#define J2K_T1_SGN_S  0x0200
#define J2K_T1_SGN_W  0x0400
#define J2K_T1_SGN_E  0x0800

#define J2K_T1_VIS    0x1000
#define J2K_T1_SIG    0x2000
#define J2K_T1_REF    0x4000

#define J2K_T1_SGN    0x8000

// Codeblock coding styles
#define J2K_CBLK_BYPASS    0x01 // Selective arithmetic coding bypass
#define J2K_CBLK_RESET     0x02 // Reset context probabilities
#define J2K_CBLK_TERMALL   0x04 // Terminate after each coding pass
#define J2K_CBLK_VSC       0x08 // Vertical stripe causal context formation
#define J2K_CBLK_PREDTERM  0x10 // Predictable termination
#define J2K_CBLK_SEGSYM    0x20 // Segmentation symbols present

// Coding styles
#define J2K_CSTY_PREC      0x01 // Precincts defined in coding style
#define J2K_CSTY_SOP       0x02 // SOP marker present
#define J2K_CSTY_EPH       0x04 // EPH marker present

typedef struct {
    int data[J2K_MAX_CBLKW][J2K_MAX_CBLKH];
    int flags[J2K_MAX_CBLKW+2][J2K_MAX_CBLKH+2];
    MqcState mqc;
} J2kT1Context;

typedef struct J2kTgtNode {
    uint8_t val;
    uint8_t vis;
    struct J2kTgtNode *parent;
} J2kTgtNode;

typedef struct {
    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
} J2kCodingStyle;

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
} J2kQuantStyle;

typedef struct {
    uint16_t rate;
    int64_t disto;
} J2kPass;

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];
    J2kPass passes[100];
} J2kCblk; ///< code block

typedef struct {
    uint16_t xi0, xi1, yi0, yi1; ///< codeblock indexes ([xi0, xi1))
    J2kTgtNode *zerobits;
    J2kTgtNode *cblkincl;
} J2kPrec; ///< 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)
    J2kPrec *prec;
    J2kCblk *cblk;
} J2kBand; ///< 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
    J2kBand *band;
} J2kResLevel; ///< resolution level

typedef struct {
   J2kResLevel *reslevel;
   DWTContext dwt;
   int *data;
   uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
} J2kComponent;

/* 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_j2k_ceildivpow2(int a, int b)
{
    return (a + (1 << b) - 1)>> b;
}

static inline int ff_j2k_ceildiv(int a, int b)
{
    return (a + b - 1) / b;
}

/* tag tree routines */
J2kTgtNode *ff_j2k_tag_tree_init(int w, int h);

/* TIER-1 routines */
void ff_j2k_init_tier1_luts(void);

void ff_j2k_set_significant(J2kT1Context *t1, int x, int y, int negative);

extern uint8_t ff_j2k_nbctxno_lut[256][4];

static inline int ff_j2k_getnbctxno(int flag, int bandno, int vert_causal_ctx_csty_symbol)
{
    return ff_j2k_nbctxno_lut[flag&255][bandno];
}

static inline int ff_j2k_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_j2k_sgnctxno_lut[16][16], ff_j2k_xorbit_lut[16][16];

static inline int ff_j2k_getsgnctxno(int flag, int *xorbit)
{
    *xorbit = ff_j2k_xorbit_lut[flag&15][(flag>>8)&15];
    return  ff_j2k_sgnctxno_lut[flag&15][(flag>>8)&15];
}

int ff_j2k_init_component(J2kComponent *comp, J2kCodingStyle *codsty, J2kQuantStyle *qntsty, int cbps, int dx, int dy);
void ff_j2k_reinit(J2kComponent *comp, J2kCodingStyle *codsty);
void ff_j2k_cleanup(J2kComponent *comp, J2kCodingStyle *codsty);

#endif /* AVCODEC_J2K_H */