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https://github.com/FFmpeg/FFmpeg.git
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235 lines
7.2 KiB
C
235 lines
7.2 KiB
C
/*
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* JPEG2000 tables
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* Copyright (c) 2007 Kamil Nowosad
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_J2K_H
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#define AVCODEC_J2K_H
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/**
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* JPEG2000 tables
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* @file
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* @author Kamil Nowosad
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*/
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#include "mqc.h"
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#include "j2k_dwt.h"
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enum J2kMarkers{
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J2K_SOC = 0xff4f, ///< start of codestream
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J2K_SIZ = 0xff51, ///< image and tile size
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J2K_COD, ///< coding style default
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J2K_COC, ///< coding style component
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J2K_TLM = 0xff55, ///< packed packet headers, tile-part header
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J2K_PLM = 0xff57, ///< tile-part lengths
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J2K_PLT, ///< packet length, main header
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J2K_QCD = 0xff5c, ///< quantization default
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J2K_QCC, ///< quantization component
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J2K_RGN, ///< region of interest
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J2K_POC, ///< progression order change
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J2K_PPM, ///< packet length, tile-part header
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J2K_PPT, ///< packed packet headers, main header
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J2K_CRG = 0xff63, ///< component registration
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J2K_COM, ///< comment
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J2K_SOT = 0xff90, ///< start of tile-part
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J2K_SOP, ///< start of packet
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J2K_EPH, ///< end of packet header
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J2K_SOD, ///< start of data
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J2K_EOC = 0xffd9, ///< end of codestream
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};
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enum J2kQuantsty{ ///< quantization style
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J2K_QSTY_NONE, ///< no quantization
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J2K_QSTY_SI, ///< scalar derived
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J2K_QSTY_SE ///< scalar expoounded
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};
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#define J2K_MAX_CBLKW 64
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#define J2K_MAX_CBLKH 64
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// T1 flags
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// flags determining significance of neighbour coefficients
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#define J2K_T1_SIG_N 0x0001
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#define J2K_T1_SIG_E 0x0002
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#define J2K_T1_SIG_W 0x0004
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#define J2K_T1_SIG_S 0x0008
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#define J2K_T1_SIG_NE 0x0010
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#define J2K_T1_SIG_NW 0x0020
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#define J2K_T1_SIG_SE 0x0040
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#define J2K_T1_SIG_SW 0x0080
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#define J2K_T1_SIG_NB (J2K_T1_SIG_N | J2K_T1_SIG_E | J2K_T1_SIG_S | J2K_T1_SIG_W \
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|J2K_T1_SIG_NE | J2K_T1_SIG_NW | J2K_T1_SIG_SE | J2K_T1_SIG_SW)
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// flags determining sign bit of neighbour coefficients
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#define J2K_T1_SGN_N 0x0100
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#define J2K_T1_SGN_S 0x0200
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#define J2K_T1_SGN_W 0x0400
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#define J2K_T1_SGN_E 0x0800
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#define J2K_T1_VIS 0x1000
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#define J2K_T1_SIG 0x2000
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#define J2K_T1_REF 0x4000
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#define J2K_T1_SGN 0x8000
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// Codeblock coding styles
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#define J2K_CBLK_BYPASS 0x01 // Selective arithmetic coding bypass
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#define J2K_CBLK_RESET 0x02 // Reset context probabilities
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#define J2K_CBLK_TERMALL 0x04 // Terminate after each coding pass
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#define J2K_CBLK_VSC 0x08 // Vertical stripe causal context formation
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#define J2K_CBLK_PREDTERM 0x10 // Predictable termination
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#define J2K_CBLK_SEGSYM 0x20 // Segmentation symbols present
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// Coding styles
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#define J2K_CSTY_PREC 0x01 // Precincts defined in coding style
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#define J2K_CSTY_SOP 0x02 // SOP marker present
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#define J2K_CSTY_EPH 0x04 // EPH marker present
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typedef struct {
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int data[J2K_MAX_CBLKW][J2K_MAX_CBLKH];
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int flags[J2K_MAX_CBLKW+2][J2K_MAX_CBLKH+2];
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MqcState mqc;
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} J2kT1Context;
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typedef struct J2kTgtNode {
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uint8_t val;
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uint8_t vis;
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struct J2kTgtNode *parent;
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} J2kTgtNode;
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typedef struct {
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uint8_t nreslevels; ///< number of resolution levels
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uint8_t log2_cblk_width,
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log2_cblk_height; ///< exponent of codeblock size
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uint8_t transform; ///< DWT type
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uint8_t csty; ///< coding style
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uint8_t log2_prec_width,
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log2_prec_height; ///< precinct size
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uint8_t nlayers; ///< number of layers
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uint8_t mct; ///< multiple component transformation
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uint8_t cblk_style; ///< codeblock coding style
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} J2kCodingStyle;
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typedef struct {
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uint8_t expn[32 * 3]; ///< quantization exponent
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uint16_t mant[32 * 3]; ///< quantization mantissa
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uint8_t quantsty; ///< quantization style
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uint8_t nguardbits; ///< number of guard bits
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} J2kQuantStyle;
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typedef struct {
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uint16_t rate;
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int64_t disto;
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} J2kPass;
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typedef struct {
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uint8_t npasses;
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uint8_t ninclpasses; ///< number coding of passes included in codestream
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uint8_t nonzerobits;
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uint16_t length;
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uint16_t lengthinc;
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uint8_t lblock;
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uint8_t zero;
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uint8_t data[8192];
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J2kPass passes[100];
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} J2kCblk; ///< code block
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typedef struct {
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uint16_t xi0, xi1, yi0, yi1; ///< codeblock indexes ([xi0, xi1))
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J2kTgtNode *zerobits;
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J2kTgtNode *cblkincl;
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} J2kPrec; ///< precinct
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typedef struct {
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uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
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uint16_t codeblock_width, codeblock_height;
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uint16_t cblknx, cblkny;
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uint32_t stepsize; ///< quantization stepsize (* 2^13)
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J2kPrec *prec;
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J2kCblk *cblk;
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} J2kBand; ///< subband
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typedef struct {
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uint8_t nbands;
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uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
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uint16_t num_precincts_x, num_precincts_y; ///< number of precincts in x/y direction
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uint8_t log2_prec_width, log2_prec_height; ///< exponent of precinct size
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J2kBand *band;
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} J2kResLevel; ///< resolution level
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typedef struct {
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J2kResLevel *reslevel;
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DWTContext dwt;
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int *data;
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uint16_t coord[2][2]; ///< border coordinates {{x0, x1}, {y0, y1}}
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} J2kComponent;
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/* debug routines */
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#if 0
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#undef fprintf
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#undef printf
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void ff_j2k_printv(int *tab, int l);
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void ff_j2k_printu(uint8_t *tab, int l);
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#endif
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/* misc tools */
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static inline int ff_j2k_ceildivpow2(int a, int b)
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{
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return (a + (1 << b) - 1)>> b;
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}
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static inline int ff_j2k_ceildiv(int a, int b)
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{
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return (a + b - 1) / b;
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}
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/* tag tree routines */
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J2kTgtNode *ff_j2k_tag_tree_init(int w, int h);
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/* TIER-1 routines */
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void ff_j2k_init_tier1_luts(void);
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void ff_j2k_set_significant(J2kT1Context *t1, int x, int y, int negative);
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extern uint8_t ff_j2k_nbctxno_lut[256][4];
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static inline int ff_j2k_getnbctxno(int flag, int bandno, int vert_causal_ctx_csty_symbol)
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{
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return ff_j2k_nbctxno_lut[flag&255][bandno];
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}
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static inline int ff_j2k_getrefctxno(int flag)
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{
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static const uint8_t refctxno_lut[2][2] = {{14, 15}, {16, 16}};
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return refctxno_lut[(flag>>14)&1][(flag & 255) != 0];
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}
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extern uint8_t ff_j2k_sgnctxno_lut[16][16], ff_j2k_xorbit_lut[16][16];
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static inline int ff_j2k_getsgnctxno(int flag, int *xorbit)
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{
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*xorbit = ff_j2k_xorbit_lut[flag&15][(flag>>8)&15];
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return ff_j2k_sgnctxno_lut[flag&15][(flag>>8)&15];
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}
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int ff_j2k_init_component(J2kComponent *comp, J2kCodingStyle *codsty, J2kQuantStyle *qntsty, int cbps, int dx, int dy);
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void ff_j2k_reinit(J2kComponent *comp, J2kCodingStyle *codsty);
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void ff_j2k_cleanup(J2kComponent *comp, J2kCodingStyle *codsty);
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#endif /* AVCODEC_J2K_H */
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