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Diffstat (limited to 'libavcodec/j2k.h')
| -rw-r--r-- | libavcodec/j2k.h | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/libavcodec/j2k.h b/libavcodec/j2k.h new file mode 100644 index 0000000..85d5cd0 --- /dev/null +++ b/libavcodec/j2k.h @@ -0,0 +1,234 @@ +/* + * 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 */ |
