/* * JPEG 2000 common defines, structures and functions * Copyright (c) 2007 Kamil Nowosad * Copyright (c) 2013 Nicolas Bertrand * * 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_JPEG2000_H #define AVCODEC_JPEG2000_H /** * @file * JPEG 2000 structures and defines common * to encoder and decoder */ #include #include "avcodec.h" #include "mqc.h" #include "jpeg2000dwt.h" enum Jpeg2000Markers { JPEG2000_SOC = 0xff4f, // start of codestream JPEG2000_SIZ = 0xff51, // image and tile size JPEG2000_COD, // coding style default JPEG2000_COC, // coding style component JPEG2000_TLM = 0xff55, // packed packet headers, tile-part header JPEG2000_PLM = 0xff57, // tile-part lengths JPEG2000_PLT, // packet length, main header JPEG2000_QCD = 0xff5c, // quantization default JPEG2000_QCC, // quantization component JPEG2000_RGN, // region of interest JPEG2000_POC, // progression order change JPEG2000_PPM, // packet length, tile-part header JPEG2000_PPT, // packed packet headers, main header JPEG2000_CRG = 0xff63, // component registration JPEG2000_COM, // comment JPEG2000_SOT = 0xff90, // start of tile-part JPEG2000_SOP, // start of packet JPEG2000_EPH, // end of packet header JPEG2000_SOD, // start of data JPEG2000_EOC = 0xffd9, // end of codestream }; #define JPEG2000_SOP_FIXED_BYTES 0xFF910004 #define JPEG2000_SOP_BYTE_LENGTH 6 enum Jpeg2000Quantsty { // quantization style JPEG2000_QSTY_NONE, // no quantization JPEG2000_QSTY_SI, // scalar derived JPEG2000_QSTY_SE // scalar expounded }; #define JPEG2000_MAX_DECLEVELS 33 #define JPEG2000_MAX_RESLEVELS (JPEG2000_MAX_DECLEVELS + 1) #define JPEG2000_MAX_PASSES 100 // T1 flags // flags determining significance of neighbor coefficients #define JPEG2000_T1_SIG_N 0x0001 #define JPEG2000_T1_SIG_E 0x0002 #define JPEG2000_T1_SIG_W 0x0004 #define JPEG2000_T1_SIG_S 0x0008 #define JPEG2000_T1_SIG_NE 0x0010 #define JPEG2000_T1_SIG_NW 0x0020 #define JPEG2000_T1_SIG_SE 0x0040 #define JPEG2000_T1_SIG_SW 0x0080 #define JPEG2000_T1_SIG_NB (JPEG2000_T1_SIG_N | JPEG2000_T1_SIG_E | \ JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_W | \ JPEG2000_T1_SIG_NE | JPEG2000_T1_SIG_NW | \ JPEG2000_T1_SIG_SE | JPEG2000_T1_SIG_SW) // flags determining sign bit of neighbor coefficients #define JPEG2000_T1_SGN_N 0x0100 #define JPEG2000_T1_SGN_S 0x0200 #define JPEG2000_T1_SGN_W 0x0400 #define JPEG2000_T1_SGN_E 0x0800 #define JPEG2000_T1_VIS 0x1000 #define JPEG2000_T1_SIG 0x2000 #define JPEG2000_T1_REF 0x4000 #define JPEG2000_T1_SGN 0x8000 // Codeblock coding styles #define JPEG2000_CBLK_BYPASS 0x01 // Selective arithmetic coding bypass #define JPEG2000_CBLK_RESET 0x02 // Reset context probabilities #define JPEG2000_CBLK_TERMALL 0x04 // Terminate after each coding pass #define JPEG2000_CBLK_VSC 0x08 // Vertical stripe causal context formation #define JPEG2000_CBLK_PREDTERM 0x10 // Predictable termination #define JPEG2000_CBLK_SEGSYM 0x20 // Segmentation symbols present // Coding styles #define JPEG2000_CSTY_PREC 0x01 // Precincts defined in coding style #define JPEG2000_CSTY_SOP 0x02 // SOP marker present #define JPEG2000_CSTY_EPH 0x04 // EPH marker present // Progression orders #define JPEG2000_PGOD_LRCP 0x00 // Layer-resolution level-component-position progression #define JPEG2000_PGOD_RLCP 0x01 // Resolution level-layer-component-position progression #define JPEG2000_PGOD_RPCL 0x02 // Resolution level-position-component-layer progression #define JPEG2000_PGOD_PCRL 0x03 // Position-component-resolution level-layer progression #define JPEG2000_PGOD_CPRL 0x04 // Component-position-resolution level-layer progression typedef struct Jpeg2000T1Context { int data[6144]; uint16_t flags[6156]; MqcState mqc; int stride; } Jpeg2000T1Context; typedef struct Jpeg2000TgtNode { uint8_t val; uint8_t vis; struct Jpeg2000TgtNode *parent; } Jpeg2000TgtNode; typedef struct Jpeg2000CodingStyle { int nreslevels; // number of resolution levels int nreslevels2decode; // number of resolution levels to decode uint8_t log2_cblk_width, log2_cblk_height; // exponent of codeblock size uint8_t transform; // DWT type uint8_t csty; // coding style uint8_t nlayers; // number of layers uint8_t mct; // multiple component transformation uint8_t cblk_style; // codeblock coding style uint8_t prog_order; // progression order uint8_t log2_prec_widths[JPEG2000_MAX_RESLEVELS]; // precincts size according resolution levels uint8_t log2_prec_heights[JPEG2000_MAX_RESLEVELS]; // TODO: initialize prec_size array with 0? } Jpeg2000CodingStyle; typedef struct Jpeg2000QuantStyle { uint8_t expn[JPEG2000_MAX_DECLEVELS * 3]; // quantization exponent uint16_t mant[JPEG2000_MAX_DECLEVELS * 3]; // quantization mantissa uint8_t quantsty; // quantization style uint8_t nguardbits; // number of guard bits } Jpeg2000QuantStyle; typedef struct Jpeg2000Pass { uint16_t rate; int64_t disto; uint8_t flushed[4]; int flushed_len; } Jpeg2000Pass; typedef struct Jpeg2000Cblk { uint8_t npasses; uint8_t ninclpasses; // number coding of passes included in codestream uint8_t nonzerobits; uint16_t length; uint16_t *lengthinc; uint8_t nb_lengthinc; uint8_t lblock; uint8_t *data; size_t data_allocated; int nb_terminations; int nb_terminationsinc; int *data_start; Jpeg2000Pass *passes; int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} } Jpeg2000Cblk; // code block typedef struct Jpeg2000Prec { int nb_codeblocks_width; int nb_codeblocks_height; Jpeg2000TgtNode *zerobits; Jpeg2000TgtNode *cblkincl; Jpeg2000Cblk *cblk; int decoded_layers; int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} } Jpeg2000Prec; // precinct typedef struct Jpeg2000Band { int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} uint16_t log2_cblk_width, log2_cblk_height; int i_stepsize; // quantization stepsize float f_stepsize; // quantization stepsize Jpeg2000Prec *prec; } Jpeg2000Band; // subband typedef struct Jpeg2000ResLevel { uint8_t nbands; int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} int 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 Jpeg2000Band *band; } Jpeg2000ResLevel; // resolution level typedef struct Jpeg2000Component { Jpeg2000ResLevel *reslevel; DWTContext dwt; float *f_data; int *i_data; int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} -- can be reduced with lowres option int coord_o[2][2]; // border coordinates {{x0, x1}, {y0, y1}} -- original values from jpeg2000 headers } Jpeg2000Component; /* misc tools */ static inline int ff_jpeg2000_ceildivpow2(int a, int b) { return -((-(int64_t)a) >> b); } static inline int ff_jpeg2000_ceildiv(int a, int b) { return (a + (int64_t)b - 1) / b; } /* TIER-1 routines */ /* Set up lookup tables used in TIER-1. */ void ff_jpeg2000_init_tier1_luts(void); /* Update significance of a coefficient at current position (x,y) and * for neighbors. */ void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y, int negative); extern uint8_t ff_jpeg2000_sigctxno_lut[256][4]; /* Get context label (number in range[0..8]) of a coefficient for significance * propagation and cleanup coding passes. */ static inline int ff_jpeg2000_getsigctxno(int flag, int bandno) { return ff_jpeg2000_sigctxno_lut[flag & 255][bandno]; } static const uint8_t refctxno_lut[2][2] = { { 14, 15 }, { 16, 16 } }; /* Get context label (number in range[14..16]) of a coefficient for magnitude * refinement pass. */ static inline int ff_jpeg2000_getrefctxno(int flag) { return refctxno_lut[(flag >> 14) & 1][(flag & 255) != 0]; } extern uint8_t ff_jpeg2000_sgnctxno_lut[16][16]; extern uint8_t ff_jpeg2000_xorbit_lut[16][16]; /* Get context label (number in range[9..13]) for sign decoding. */ static inline int ff_jpeg2000_getsgnctxno(int flag, int *xorbit) { *xorbit = ff_jpeg2000_xorbit_lut[flag & 15][(flag >> 8) & 15]; return ff_jpeg2000_sgnctxno_lut[flag & 15][(flag >> 8) & 15]; } int ff_jpeg2000_init_component(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty, Jpeg2000QuantStyle *qntsty, int cbps, int dx, int dy, AVCodecContext *ctx); void ff_jpeg2000_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty); void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty); static inline int needs_termination(int style, int passno) { if (style & JPEG2000_CBLK_BYPASS) { int type = passno % 3; passno /= 3; if (type == 0 && passno > 2) return 2; if (type == 2 && passno > 2) return 1; if (style & JPEG2000_CBLK_TERMALL) { return passno > 2 ? 2 : 1; } } if (style & JPEG2000_CBLK_TERMALL) return 1; return 0; } #endif /* AVCODEC_JPEG2000_H */