| /* |
| * 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 */ |