| 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 */ |