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j2k.h
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1 /*
2  * JPEG2000 tables
3  * Copyright (c) 2007 Kamil Nowosad
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #ifndef AVCODEC_J2K_H
23 #define AVCODEC_J2K_H
24 
25 /**
26  * JPEG2000 tables
27  * @file
28  * @author Kamil Nowosad
29  */
30 
31 #include "mqc.h"
32 #include "j2k_dwt.h"
33 
35  J2K_SOC = 0xff4f, ///< start of codestream
36  J2K_SIZ = 0xff51, ///< image and tile size
37  J2K_COD, ///< coding style default
38  J2K_COC, ///< coding style component
39  J2K_TLM = 0xff55, ///< packed packet headers, tile-part header
40  J2K_PLM = 0xff57, ///< tile-part lengths
41  J2K_PLT, ///< packet length, main header
42  J2K_QCD = 0xff5c, ///< quantization default
43  J2K_QCC, ///< quantization component
44  J2K_RGN, ///< region of interest
45  J2K_POC, ///< progression order change
46  J2K_PPM, ///< packet length, tile-part header
47  J2K_PPT, ///< packed packet headers, main header
48  J2K_CRG = 0xff63, ///< component registration
49  J2K_COM, ///< comment
50  J2K_SOT = 0xff90, ///< start of tile-part
51  J2K_SOP, ///< start of packet
52  J2K_EPH, ///< end of packet header
53  J2K_SOD, ///< start of data
54  J2K_EOC = 0xffd9, ///< end of codestream
55 };
56 
57 enum J2kQuantsty{ ///< quantization style
58  J2K_QSTY_NONE, ///< no quantization
59  J2K_QSTY_SI, ///< scalar derived
60  J2K_QSTY_SE ///< scalar expoounded
61 };
62 
63 #define J2K_MAX_CBLKW 64
64 #define J2K_MAX_CBLKH 64
65 
66 // T1 flags
67 // flags determining significance of neighbour coefficients
68 #define J2K_T1_SIG_N 0x0001
69 #define J2K_T1_SIG_E 0x0002
70 #define J2K_T1_SIG_W 0x0004
71 #define J2K_T1_SIG_S 0x0008
72 #define J2K_T1_SIG_NE 0x0010
73 #define J2K_T1_SIG_NW 0x0020
74 #define J2K_T1_SIG_SE 0x0040
75 #define J2K_T1_SIG_SW 0x0080
76 #define J2K_T1_SIG_NB (J2K_T1_SIG_N | J2K_T1_SIG_E | J2K_T1_SIG_S | J2K_T1_SIG_W \
77  |J2K_T1_SIG_NE | J2K_T1_SIG_NW | J2K_T1_SIG_SE | J2K_T1_SIG_SW)
78 // flags determining sign bit of neighbour coefficients
79 #define J2K_T1_SGN_N 0x0100
80 #define J2K_T1_SGN_S 0x0200
81 #define J2K_T1_SGN_W 0x0400
82 #define J2K_T1_SGN_E 0x0800
83 
84 #define J2K_T1_VIS 0x1000
85 #define J2K_T1_SIG 0x2000
86 #define J2K_T1_REF 0x4000
87 
88 #define J2K_T1_SGN 0x8000
89 
90 // Codeblock coding styles
91 #define J2K_CBLK_BYPASS 0x01 // Selective arithmetic coding bypass
92 #define J2K_CBLK_RESET 0x02 // Reset context probabilities
93 #define J2K_CBLK_TERMALL 0x04 // Terminate after each coding pass
94 #define J2K_CBLK_VSC 0x08 // Vertical stripe causal context formation
95 #define J2K_CBLK_PREDTERM 0x10 // Predictable termination
96 #define J2K_CBLK_SEGSYM 0x20 // Segmentation symbols present
97 
98 // Coding styles
99 #define J2K_CSTY_PREC 0x01 // Precincts defined in coding style
100 #define J2K_CSTY_SOP 0x02 // SOP marker present
101 #define J2K_CSTY_EPH 0x04 // EPH marker present
102 
103 typedef struct {
107 } J2kT1Context;
108 
109 typedef struct J2kTgtNode {
113 } J2kTgtNode;
114 
115 typedef struct {
116  uint8_t nreslevels; ///< number of resolution levels
118  log2_cblk_height; ///< exponent of codeblock size
119  uint8_t transform; ///< DWT type
120  uint8_t csty; ///< coding style
122  log2_prec_height; ///< precinct size
123  uint8_t nlayers; ///< number of layers
124  uint8_t mct; ///< multiple component transformation
125  uint8_t cblk_style; ///< codeblock coding style
127 
128 typedef struct {
129  uint8_t expn[32 * 3]; ///< quantization exponent
130  uint16_t mant[32 * 3]; ///< quantization mantissa
131  uint8_t quantsty; ///< quantization style
132  uint8_t nguardbits; ///< number of guard bits
133 } J2kQuantStyle;
134 
135 typedef struct {
136  uint16_t rate;
137  int64_t disto;
138 } J2kPass;
139 
140 typedef struct {
142  uint8_t ninclpasses; ///< number coding of passes included in codestream
144  uint16_t length;
145  uint16_t lengthinc;
148  uint8_t data[8192];
149  J2kPass passes[100];
150 } J2kCblk; ///< code block
151 
152 typedef struct {
153  uint16_t xi0, xi1, yi0, yi1; ///< codeblock indexes ([xi0, xi1))
156 } J2kPrec; ///< precinct
157 
158 typedef struct {
159  uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
160  uint16_t codeblock_width, codeblock_height;
161  uint16_t cblknx, cblkny;
162  uint32_t stepsize; ///< quantization stepsize (* 2^13)
165 } J2kBand; ///< subband
166 
167 typedef struct {
169  uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
170  uint16_t num_precincts_x, num_precincts_y; ///< number of precincts in x/y direction
171  uint8_t log2_prec_width, log2_prec_height; ///< exponent of precinct size
173 } J2kResLevel; ///< resolution level
174 
175 typedef struct {
178  int *data;
179  uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
180 } J2kComponent;
181 
182 /* debug routines */
183 #if 0
184 #undef fprintf
185 #undef printf
186 void ff_j2k_printv(int *tab, int l);
187 void ff_j2k_printu(uint8_t *tab, int l);
188 #endif
189 
190 /* misc tools */
191 static inline int ff_j2k_ceildivpow2(int a, int b)
192 {
193  return (a + (1 << b) - 1)>> b;
194 }
195 
196 static inline int ff_j2k_ceildiv(int a, int b)
197 {
198  return (a + b - 1) / b;
199 }
200 
201 /* tag tree routines */
202 J2kTgtNode *ff_j2k_tag_tree_init(int w, int h);
203 
204 /* TIER-1 routines */
205 void ff_j2k_init_tier1_luts(void);
206 
207 void ff_j2k_set_significant(J2kT1Context *t1, int x, int y, int negative);
208 
209 extern uint8_t ff_j2k_nbctxno_lut[256][4];
210 
211 static inline int ff_j2k_getnbctxno(int flag, int bandno, int vert_causal_ctx_csty_symbol)
212 {
213  return ff_j2k_nbctxno_lut[flag&255][bandno];
214 }
215 
216 static inline int ff_j2k_getrefctxno(int flag)
217 {
218  static const uint8_t refctxno_lut[2][2] = {{14, 15}, {16, 16}};
219  return refctxno_lut[(flag>>14)&1][(flag & 255) != 0];
220 }
221 
222 extern uint8_t ff_j2k_sgnctxno_lut[16][16], ff_j2k_xorbit_lut[16][16];
223 
224 static inline int ff_j2k_getsgnctxno(int flag, int *xorbit)
225 {
226  *xorbit = ff_j2k_xorbit_lut[flag&15][(flag>>8)&15];
227  return ff_j2k_sgnctxno_lut[flag&15][(flag>>8)&15];
228 }
229 
230 int ff_j2k_init_component(J2kComponent *comp, J2kCodingStyle *codsty, J2kQuantStyle *qntsty, int cbps, int dx, int dy);
233 
234 #endif /* AVCODEC_J2K_H */