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1 | /* |
2 | * JPEG 2000 common defines, structures and functions | |
3 | * Copyright (c) 2007 Kamil Nowosad | |
4 | * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com> | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #ifndef AVCODEC_JPEG2000_H | |
24 | #define AVCODEC_JPEG2000_H | |
25 | ||
26 | /** | |
27 | * @file | |
28 | * JPEG 2000 structures and defines common | |
29 | * to encoder and decoder | |
30 | */ | |
31 | ||
32 | #include <stdint.h> | |
33 | ||
34 | #include "avcodec.h" | |
35 | #include "mqc.h" | |
36 | #include "jpeg2000dwt.h" | |
37 | ||
38 | enum Jpeg2000Markers { | |
39 | JPEG2000_SOC = 0xff4f, // start of codestream | |
40 | JPEG2000_SIZ = 0xff51, // image and tile size | |
41 | JPEG2000_COD, // coding style default | |
42 | JPEG2000_COC, // coding style component | |
43 | JPEG2000_TLM = 0xff55, // packed packet headers, tile-part header | |
44 | JPEG2000_PLM = 0xff57, // tile-part lengths | |
45 | JPEG2000_PLT, // packet length, main header | |
46 | JPEG2000_QCD = 0xff5c, // quantization default | |
47 | JPEG2000_QCC, // quantization component | |
48 | JPEG2000_RGN, // region of interest | |
49 | JPEG2000_POC, // progression order change | |
50 | JPEG2000_PPM, // packet length, tile-part header | |
51 | JPEG2000_PPT, // packed packet headers, main header | |
52 | JPEG2000_CRG = 0xff63, // component registration | |
53 | JPEG2000_COM, // comment | |
54 | JPEG2000_SOT = 0xff90, // start of tile-part | |
55 | JPEG2000_SOP, // start of packet | |
56 | JPEG2000_EPH, // end of packet header | |
57 | JPEG2000_SOD, // start of data | |
58 | JPEG2000_EOC = 0xffd9, // end of codestream | |
59 | }; | |
60 | ||
61 | enum Jpeg2000Quantsty { // quantization style | |
62 | JPEG2000_QSTY_NONE, // no quantization | |
63 | JPEG2000_QSTY_SI, // scalar derived | |
64 | JPEG2000_QSTY_SE // scalar expounded | |
65 | }; | |
66 | ||
67 | #define JPEG2000_MAX_CBLKW 64 | |
68 | #define JPEG2000_MAX_CBLKH 64 | |
69 | ||
70 | ||
71 | #define JPEG2000_MAX_DECLEVELS 32 | |
72 | #define JPEG2000_MAX_RESLEVELS (JPEG2000_MAX_DECLEVELS + 1) | |
73 | ||
74 | // T1 flags | |
75 | // flags determining significance of neighbor coefficients | |
76 | #define JPEG2000_T1_SIG_N 0x0001 | |
77 | #define JPEG2000_T1_SIG_E 0x0002 | |
78 | #define JPEG2000_T1_SIG_W 0x0004 | |
79 | #define JPEG2000_T1_SIG_S 0x0008 | |
80 | #define JPEG2000_T1_SIG_NE 0x0010 | |
81 | #define JPEG2000_T1_SIG_NW 0x0020 | |
82 | #define JPEG2000_T1_SIG_SE 0x0040 | |
83 | #define JPEG2000_T1_SIG_SW 0x0080 | |
84 | #define JPEG2000_T1_SIG_NB (JPEG2000_T1_SIG_N | JPEG2000_T1_SIG_E | \ | |
85 | JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_W | \ | |
86 | JPEG2000_T1_SIG_NE | JPEG2000_T1_SIG_NW | \ | |
87 | JPEG2000_T1_SIG_SE | JPEG2000_T1_SIG_SW) | |
88 | // flags determining sign bit of neighbor coefficients | |
89 | #define JPEG2000_T1_SGN_N 0x0100 | |
90 | #define JPEG2000_T1_SGN_S 0x0200 | |
91 | #define JPEG2000_T1_SGN_W 0x0400 | |
92 | #define JPEG2000_T1_SGN_E 0x0800 | |
93 | ||
94 | #define JPEG2000_T1_VIS 0x1000 | |
95 | #define JPEG2000_T1_SIG 0x2000 | |
96 | #define JPEG2000_T1_REF 0x4000 | |
97 | ||
98 | #define JPEG2000_T1_SGN 0x8000 | |
99 | ||
100 | // Codeblock coding styles | |
101 | #define JPEG2000_CBLK_BYPASS 0x01 // Selective arithmetic coding bypass | |
102 | #define JPEG2000_CBLK_RESET 0x02 // Reset context probabilities | |
103 | #define JPEG2000_CBLK_TERMALL 0x04 // Terminate after each coding pass | |
104 | #define JPEG2000_CBLK_VSC 0x08 // Vertical stripe causal context formation | |
105 | #define JPEG2000_CBLK_PREDTERM 0x10 // Predictable termination | |
106 | #define JPEG2000_CBLK_SEGSYM 0x20 // Segmentation symbols present | |
107 | ||
108 | // Coding styles | |
109 | #define JPEG2000_CSTY_PREC 0x01 // Precincts defined in coding style | |
110 | #define JPEG2000_CSTY_SOP 0x02 // SOP marker present | |
111 | #define JPEG2000_CSTY_EPH 0x04 // EPH marker present | |
112 | ||
113 | // Progression orders | |
114 | #define JPEG2000_PGOD_LRCP 0x00 // Layer-resolution level-component-position progression | |
115 | #define JPEG2000_PGOD_RLCP 0x01 // Resolution level-layer-component-position progression | |
116 | #define JPEG2000_PGOD_RPCL 0x02 // Resolution level-position-component-layer progression | |
117 | #define JPEG2000_PGOD_PCRL 0x03 // Position-component-resolution level-layer progression | |
118 | #define JPEG2000_PGOD_CPRL 0x04 // Component-position-resolution level-layer progression | |
119 | ||
120 | typedef struct Jpeg2000T1Context { | |
121 | int data[JPEG2000_MAX_CBLKW][JPEG2000_MAX_CBLKH]; | |
122 | int flags[JPEG2000_MAX_CBLKW + 2][JPEG2000_MAX_CBLKH + 2]; | |
123 | MqcState mqc; | |
124 | } Jpeg2000T1Context; | |
125 | ||
126 | typedef struct Jpeg2000TgtNode { | |
127 | uint8_t val; | |
128 | uint8_t vis; | |
129 | struct Jpeg2000TgtNode *parent; | |
130 | } Jpeg2000TgtNode; | |
131 | ||
132 | typedef struct Jpeg2000CodingStyle { | |
133 | int nreslevels; // number of resolution levels | |
134 | int nreslevels2decode; // number of resolution levels to decode | |
135 | uint8_t log2_cblk_width, | |
136 | log2_cblk_height; // exponent of codeblock size | |
137 | uint8_t transform; // DWT type | |
138 | uint8_t csty; // coding style | |
139 | uint8_t nlayers; // number of layers | |
140 | uint8_t mct; // multiple component transformation | |
141 | uint8_t cblk_style; // codeblock coding style | |
142 | uint8_t prog_order; // progression order | |
143 | uint8_t log2_prec_widths[JPEG2000_MAX_RESLEVELS]; // precincts size according resolution levels | |
144 | uint8_t log2_prec_heights[JPEG2000_MAX_RESLEVELS]; // TODO: initialize prec_size array with 0? | |
145 | } Jpeg2000CodingStyle; | |
146 | ||
147 | typedef struct Jpeg2000QuantStyle { | |
148 | uint8_t expn[JPEG2000_MAX_DECLEVELS * 3]; // quantization exponent | |
149 | uint16_t mant[JPEG2000_MAX_DECLEVELS * 3]; // quantization mantissa | |
150 | uint8_t quantsty; // quantization style | |
151 | uint8_t nguardbits; // number of guard bits | |
152 | } Jpeg2000QuantStyle; | |
153 | ||
154 | typedef struct Jpeg2000Pass { | |
155 | uint16_t rate; | |
156 | int64_t disto; | |
157 | } Jpeg2000Pass; | |
158 | ||
159 | typedef struct Jpeg2000Cblk { | |
160 | uint8_t npasses; | |
161 | uint8_t ninclpasses; // number coding of passes included in codestream | |
162 | uint8_t nonzerobits; | |
163 | uint16_t length; | |
164 | uint16_t lengthinc; | |
165 | uint8_t lblock; | |
166 | uint8_t zero; | |
167 | uint8_t data[8192]; | |
168 | Jpeg2000Pass passes[100]; | |
169 | uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} | |
170 | } Jpeg2000Cblk; // code block | |
171 | ||
172 | typedef struct Jpeg2000Prec { | |
173 | uint16_t nb_codeblocks_width; | |
174 | uint16_t nb_codeblocks_height; | |
175 | Jpeg2000TgtNode *zerobits; | |
176 | Jpeg2000TgtNode *cblkincl; | |
177 | Jpeg2000Cblk *cblk; | |
178 | uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} | |
179 | } Jpeg2000Prec; // precinct | |
180 | ||
181 | typedef struct Jpeg2000Band { | |
182 | uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} | |
183 | uint16_t log2_cblk_width, log2_cblk_height; | |
184 | int i_stepsize; // quantization stepsize | |
185 | float f_stepsize; // quantization stepsize | |
186 | Jpeg2000Prec *prec; | |
187 | } Jpeg2000Band; // subband | |
188 | ||
189 | typedef struct Jpeg2000ResLevel { | |
190 | uint8_t nbands; | |
191 | uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} | |
192 | uint16_t num_precincts_x, num_precincts_y; // number of precincts in x/y direction | |
193 | uint8_t log2_prec_width, log2_prec_height; // exponent of precinct size | |
194 | Jpeg2000Band *band; | |
195 | } Jpeg2000ResLevel; // resolution level | |
196 | ||
197 | typedef struct Jpeg2000Component { | |
198 | Jpeg2000ResLevel *reslevel; | |
199 | DWTContext dwt; | |
200 | float *f_data; | |
201 | int *i_data; | |
202 | uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} -- can be reduced with lowres option | |
203 | uint16_t coord_o[2][2]; // border coordinates {{x0, x1}, {y0, y1}} -- original values from jpeg2000 headers | |
204 | } Jpeg2000Component; | |
205 | ||
206 | /* misc tools */ | |
207 | static inline int ff_jpeg2000_ceildivpow2(int a, int b) | |
208 | { | |
209 | return (a + (1 << b) - 1) >> b; | |
210 | } | |
211 | ||
212 | static inline int ff_jpeg2000_ceildiv(int a, int b) | |
213 | { | |
214 | return (a + b - 1) / b; | |
215 | } | |
216 | ||
217 | /* TIER-1 routines */ | |
218 | ||
219 | /* Set up lookup tables used in TIER-1. */ | |
220 | void ff_jpeg2000_init_tier1_luts(void); | |
221 | ||
222 | /* Update significance of a coefficient at current position (x,y) and | |
223 | * for neighbors. */ | |
224 | void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, | |
225 | int x, int y, int negative); | |
226 | ||
227 | extern uint8_t ff_jpeg2000_sigctxno_lut[256][4]; | |
228 | ||
229 | /* Get context label (number in range[0..8]) of a coefficient for significance | |
230 | * propagation and cleanup coding passes. */ | |
231 | static inline int ff_jpeg2000_getsigctxno(int flag, int bandno) | |
232 | { | |
233 | return ff_jpeg2000_sigctxno_lut[flag & 255][bandno]; | |
234 | } | |
235 | ||
236 | static const uint8_t refctxno_lut[2][2] = { { 14, 15 }, { 16, 16 } }; | |
237 | ||
238 | /* Get context label (number in range[14..16]) of a coefficient for magnitude | |
239 | * refinement pass. */ | |
240 | static inline int ff_jpeg2000_getrefctxno(int flag) | |
241 | { | |
242 | return refctxno_lut[(flag >> 14) & 1][(flag & 255) != 0]; | |
243 | } | |
244 | ||
245 | extern uint8_t ff_jpeg2000_sgnctxno_lut[16][16]; | |
246 | extern uint8_t ff_jpeg2000_xorbit_lut[16][16]; | |
247 | ||
248 | /* Get context label (number in range[9..13]) for sign decoding. */ | |
249 | static inline int ff_jpeg2000_getsgnctxno(int flag, int *xorbit) | |
250 | { | |
251 | *xorbit = ff_jpeg2000_xorbit_lut[flag & 15][(flag >> 8) & 15]; | |
252 | return ff_jpeg2000_sgnctxno_lut[flag & 15][(flag >> 8) & 15]; | |
253 | } | |
254 | ||
255 | int ff_jpeg2000_init_component(Jpeg2000Component *comp, | |
256 | Jpeg2000CodingStyle *codsty, | |
257 | Jpeg2000QuantStyle *qntsty, | |
258 | int cbps, int dx, int dy, | |
259 | AVCodecContext *ctx); | |
260 | ||
261 | void ff_jpeg2000_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty); | |
262 | ||
263 | void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty); | |
264 | ||
265 | #endif /* AVCODEC_JPEG2000_H */ |