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Diffstat (limited to 'converter/other/jpeg2000/libjasper/jpc/jpc_mqdec.h')
| -rw-r--r-- | converter/other/jpeg2000/libjasper/jpc/jpc_mqdec.h | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/converter/other/jpeg2000/libjasper/jpc/jpc_mqdec.h b/converter/other/jpeg2000/libjasper/jpc/jpc_mqdec.h new file mode 100644 index 00000000..30185506 --- /dev/null +++ b/converter/other/jpeg2000/libjasper/jpc/jpc_mqdec.h @@ -0,0 +1,320 @@ +/* + * Copyright (c) 1999-2000 Image Power, Inc. and the University of + * British Columbia. + * Copyright (c) 2001-2002 Michael David Adams. + * All rights reserved. + */ + +/* __START_OF_JASPER_LICENSE__ + * + * JasPer Software License + * + * IMAGE POWER JPEG-2000 PUBLIC LICENSE + * ************************************ + * + * GRANT: + * + * Permission is hereby granted, free of charge, to any person (the "User") + * obtaining a copy of this software and associated documentation, to deal + * in the JasPer Software without restriction, including without limitation + * the right to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the JasPer Software (in source and binary forms), + * and to permit persons to whom the JasPer Software is furnished to do so, + * provided further that the License Conditions below are met. + * + * License Conditions + * ****************** + * + * A. Redistributions of source code must retain the above copyright notice, + * and this list of conditions, and the following disclaimer. + * + * B. Redistributions in binary form must reproduce the above copyright + * notice, and this list of conditions, and the following disclaimer in + * the documentation and/or other materials provided with the distribution. + * + * C. Neither the name of Image Power, Inc. nor any other contributor + * (including, but not limited to, the University of British Columbia and + * Michael David Adams) may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * D. User agrees that it shall not commence any action against Image Power, + * Inc., the University of British Columbia, Michael David Adams, or any + * other contributors (collectively "Licensors") for infringement of any + * intellectual property rights ("IPR") held by the User in respect of any + * technology that User owns or has a right to license or sublicense and + * which is an element required in order to claim compliance with ISO/IEC + * 15444-1 (i.e., JPEG-2000 Part 1). "IPR" means all intellectual property + * rights worldwide arising under statutory or common law, and whether + * or not perfected, including, without limitation, all (i) patents and + * patent applications owned or licensable by User; (ii) rights associated + * with works of authorship including copyrights, copyright applications, + * copyright registrations, mask work rights, mask work applications, + * mask work registrations; (iii) rights relating to the protection of + * trade secrets and confidential information; (iv) any right analogous + * to those set forth in subsections (i), (ii), or (iii) and any other + * proprietary rights relating to intangible property (other than trademark, + * trade dress, or service mark rights); and (v) divisions, continuations, + * renewals, reissues and extensions of the foregoing (as and to the extent + * applicable) now existing, hereafter filed, issued or acquired. + * + * E. If User commences an infringement action against any Licensor(s) then + * such Licensor(s) shall have the right to terminate User's license and + * all sublicenses that have been granted hereunder by User to other parties. + * + * F. This software is for use only in hardware or software products that + * are compliant with ISO/IEC 15444-1 (i.e., JPEG-2000 Part 1). No license + * or right to this Software is granted for products that do not comply + * with ISO/IEC 15444-1. The JPEG-2000 Part 1 standard can be purchased + * from the ISO. + * + * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. + * NO USE OF THE JASPER SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER + * THIS DISCLAIMER. THE JASPER SOFTWARE IS PROVIDED BY THE LICENSORS AND + * CONTRIBUTORS UNDER THIS LICENSE ON AN ``AS-IS'' BASIS, WITHOUT WARRANTY + * OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, + * WARRANTIES THAT THE JASPER SOFTWARE IS FREE OF DEFECTS, IS MERCHANTABLE, + * IS FIT FOR A PARTICULAR PURPOSE OR IS NON-INFRINGING. THOSE INTENDING + * TO USE THE JASPER SOFTWARE OR MODIFICATIONS THEREOF FOR USE IN HARDWARE + * OR SOFTWARE PRODUCTS ARE ADVISED THAT THEIR USE MAY INFRINGE EXISTING + * PATENTS, COPYRIGHTS, TRADEMARKS, OR OTHER INTELLECTUAL PROPERTY RIGHTS. + * THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE JASPER SOFTWARE + * IS WITH THE USER. SHOULD ANY PART OF THE JASPER SOFTWARE PROVE DEFECTIVE + * IN ANY RESPECT, THE USER (AND NOT THE INITIAL DEVELOPERS, THE UNIVERSITY + * OF BRITISH COLUMBIA, IMAGE POWER, INC., MICHAEL DAVID ADAMS, OR ANY + * OTHER CONTRIBUTOR) SHALL ASSUME THE COST OF ANY NECESSARY SERVICING, + * REPAIR OR CORRECTION. UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, + * WHETHER TORT (INCLUDING NEGLIGENCE), CONTRACT, OR OTHERWISE, SHALL THE + * INITIAL DEVELOPER, THE UNIVERSITY OF BRITISH COLUMBIA, IMAGE POWER, INC., + * MICHAEL DAVID ADAMS, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF THE + * JASPER SOFTWARE, OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE TO + * THE USER OR ANY OTHER PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR + * CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT LIMITATION, + * DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR + * MALFUNCTION, OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR LOSSES, EVEN IF + * SUCH PARTY HAD BEEN INFORMED, OR OUGHT TO HAVE KNOWN, OF THE POSSIBILITY + * OF SUCH DAMAGES. THE JASPER SOFTWARE AND UNDERLYING TECHNOLOGY ARE NOT + * FAULT-TOLERANT AND ARE NOT DESIGNED, MANUFACTURED OR INTENDED FOR USE OR + * RESALE AS ON-LINE CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING + * FAIL-SAFE PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, + * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT + * LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE + * JASPER SOFTWARE OR UNDERLYING TECHNOLOGY OR PRODUCT COULD LEAD DIRECTLY + * TO DEATH, PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE + * ("HIGH RISK ACTIVITIES"). LICENSOR SPECIFICALLY DISCLAIMS ANY EXPRESS + * OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES. USER WILL NOT + * KNOWINGLY USE, DISTRIBUTE OR RESELL THE JASPER SOFTWARE OR UNDERLYING + * TECHNOLOGY OR PRODUCTS FOR HIGH RISK ACTIVITIES AND WILL ENSURE THAT ITS + * CUSTOMERS AND END-USERS OF ITS PRODUCTS ARE PROVIDED WITH A COPY OF THE + * NOTICE SPECIFIED IN THIS SECTION. + * + * __END_OF_JASPER_LICENSE__ + */ + +/* + * MQ Arithmetic Decoder + * + * $Id$ + */ + +#ifndef JPC_MQDEC_H +#define JPC_MQDEC_H + +/******************************************************************************\ +* Includes. +\******************************************************************************/ + +#include "jasper/jas_types.h" +#include "jasper/jas_stream.h" + +#include "jpc_mqcod.h" + +/******************************************************************************\ +* Types. +\******************************************************************************/ + +/* MQ arithmetic decoder. */ + +typedef struct { + + /* The C register. */ + uint_fast32_t creg; + + /* The A register. */ + uint_fast32_t areg; + + /* The CT register. */ + uint_fast32_t ctreg; + + /* The current context. */ + jpc_mqstate_t **curctx; + + /* The per-context information. */ + jpc_mqstate_t **ctxs; + + /* The maximum number of contexts. */ + int maxctxs; + + /* The stream from which to read data. */ + jas_stream_t *in; + + /* The last character read. */ + unsigned char inbuffer; + + /* The EOF indicator. */ + int eof; + +} jpc_mqdec_t; + +/******************************************************************************\ +* Functions/macros for construction and destruction. +\******************************************************************************/ + +/* Create a MQ decoder. */ +jpc_mqdec_t *jpc_mqdec_create(int maxctxs, jas_stream_t *in); + +/* Destroy a MQ decoder. */ +void jpc_mqdec_destroy(jpc_mqdec_t *dec); + +/******************************************************************************\ +* Functions/macros for initialization. +\******************************************************************************/ + +/* Set the input stream associated with a MQ decoder. */ +void jpc_mqdec_setinput(jpc_mqdec_t *dec, jas_stream_t *in); + +/* Initialize a MQ decoder. */ +void jpc_mqdec_init(jpc_mqdec_t *dec); + +/******************************************************************************\ +* Functions/macros for manipulating contexts. +\******************************************************************************/ + +/* Set the current context for a MQ decoder. */ +#define jpc_mqdec_setcurctx(dec, ctxno) \ + ((mqdec)->curctx = &(mqdec)->ctxs[ctxno]); + +/* Set the state information for a particular context of a MQ decoder. */ +void jpc_mqdec_setctx(jpc_mqdec_t *dec, int ctxno, jpc_mqctx_t *ctx); + +/* Set the state information for all contexts of a MQ decoder. */ +void jpc_mqdec_setctxs(jpc_mqdec_t *dec, int numctxs, jpc_mqctx_t *ctxs); + +/******************************************************************************\ +* Functions/macros for decoding bits. +\******************************************************************************/ + +/* Decode a symbol. */ +#if !defined(DEBUG) +#define jpc_mqdec_getbit(dec) \ + jpc_mqdec_getbit_macro(dec) +#else +#define jpc_mqdec_getbit(dec) \ + jpc_mqdec_getbit_func(dec) +#endif + +/* Decode a symbol (assuming an unskewed probability distribution). */ +#if !defined(DEBUG) +#define jpc_mqdec_getbitnoskew(dec) \ + jpc_mqdec_getbit_macro(dec) +#else +#define jpc_mqdec_getbitnoskew(dec) \ + jpc_mqdec_getbit_func(dec) +#endif + +/******************************************************************************\ +* Functions/macros for debugging. +\******************************************************************************/ + +/* Dump the MQ decoder state for debugging. */ +void mqdec_dump(jpc_mqdec_t *dec, FILE *out); + +/******************************************************************************\ +* EVERYTHING BELOW THIS POINT IS IMPLEMENTATION SPECIFIC AND NOT PART OF THE +* APPLICATION INTERFACE. DO NOT RELY ON ANY OF THE INTERNAL FUNCTIONS/MACROS +* GIVEN BELOW. +\******************************************************************************/ + +#define jpc_mqdec_getbit_macro(dec) \ + ((((dec)->areg -= (*(dec)->curctx)->qeval), \ + (dec)->creg >> 16 >= (*(dec)->curctx)->qeval) ? \ + ((((dec)->creg -= (*(dec)->curctx)->qeval << 16), \ + (dec)->areg & 0x8000) ? (*(dec)->curctx)->mps : \ + jpc_mqdec_mpsexchrenormd(dec)) : \ + jpc_mqdec_lpsexchrenormd(dec)) + +#define jpc_mqdec_mpsexchange(areg, delta, curctx, bit) \ +{ \ + if ((areg) < (delta)) { \ + register jpc_mqstate_t *state = *(curctx); \ + /* LPS decoded. */ \ + (bit) = state->mps ^ 1; \ + *(curctx) = state->nlps; \ + } else { \ + register jpc_mqstate_t *state = *(curctx); \ + /* MPS decoded. */ \ + (bit) = state->mps; \ + *(curctx) = state->nmps; \ + } \ +} + +#define jpc_mqdec_lpsexchange(areg, delta, curctx, bit) \ +{ \ + if ((areg) >= (delta)) { \ + register jpc_mqstate_t *state = *(curctx); \ + (areg) = (delta); \ + (bit) = state->mps ^ 1; \ + *(curctx) = state->nlps; \ + } else { \ + register jpc_mqstate_t *state = *(curctx); \ + (areg) = (delta); \ + (bit) = state->mps; \ + *(curctx) = state->nmps; \ + } \ +} + +#define jpc_mqdec_renormd(areg, creg, ctreg, in, eof, inbuf) \ +{ \ + do { \ + if (!(ctreg)) { \ + jpc_mqdec_bytein2(creg, ctreg, in, eof, inbuf); \ + } \ + (areg) <<= 1; \ + (creg) <<= 1; \ + --(ctreg); \ + } while (!((areg) & 0x8000)); \ +} + +#define jpc_mqdec_bytein2(creg, ctreg, in, eof, inbuf) \ +{ \ + int c; \ + unsigned char prevbuf; \ + if (!(eof)) { \ + if ((c = jas_stream_getc(in)) == EOF) { \ + (eof) = 1; \ + c = 0xff; \ + } \ + prevbuf = (inbuf); \ + (inbuf) = c; \ + if (prevbuf == 0xff) { \ + if (c > 0x8f) { \ + (creg) += 0xff00; \ + (ctreg) = 8; \ + } else { \ + (creg) += c << 9; \ + (ctreg) = 7; \ + } \ + } else { \ + (creg) += c << 8; \ + (ctreg) = 8; \ + } \ + } else { \ + (creg) += 0xff00; \ + (ctreg) = 8; \ + } \ +} + +int jpc_mqdec_getbit_func(jpc_mqdec_t *dec); +int jpc_mqdec_mpsexchrenormd(jpc_mqdec_t *dec); +int jpc_mqdec_lpsexchrenormd(jpc_mqdec_t *dec); + +#endif |