/*
* 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
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* 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 Encoder
*
* $Id$
*/
#ifndef JPC_MQENC_H
#define JPC_MQENC_H
/******************************************************************************\
* Includes.
\******************************************************************************/
#include "jasper/jas_types.h"
#include "jasper/jas_stream.h"
#include "jpc_mqcod.h"
/******************************************************************************\
* Constants.
\******************************************************************************/
/*
* Termination modes.
*/
#define JPC_MQENC_DEFTERM 0 /* default termination */
#define JPC_MQENC_PTERM 1 /* predictable termination */
/******************************************************************************\
* Types.
\******************************************************************************/
/* MQ arithmetic encoder class. */
typedef struct {
/* The C register. */
uint_fast32_t creg;
/* The A register. */
uint_fast32_t areg;
/* The CT register. */
uint_fast32_t ctreg;
/* The maximum number of contexts. */
int maxctxs;
/* The per-context information. */
jpc_mqstate_t **ctxs;
/* The current context. */
jpc_mqstate_t **curctx;
/* The stream for encoder output. */
jas_stream_t *out;
/* The byte buffer (i.e., the B variable in the standard). */
int_fast16_t outbuf;
/* The last byte output. */
int_fast16_t lastbyte;
/* The error indicator. */
int err;
} jpc_mqenc_t;
/* MQ arithmetic encoder state information. */
typedef struct {
/* The A register. */
unsigned areg;
/* The C register. */
unsigned creg;
/* The CT register. */
unsigned ctreg;
/* The last byte output by the encoder. */
int lastbyte;
} jpc_mqencstate_t;
/******************************************************************************\
* Functions/macros for construction and destruction.
\******************************************************************************/
/* Create a MQ encoder. */
jpc_mqenc_t *jpc_mqenc_create(int maxctxs, jas_stream_t *out);
/* Destroy a MQ encoder. */
void jpc_mqenc_destroy(jpc_mqenc_t *enc);
/******************************************************************************\
* Functions/macros for initialization.
\******************************************************************************/
/* Initialize a MQ encoder. */
void jpc_mqenc_init(jpc_mqenc_t *enc);
/******************************************************************************\
* Functions/macros for context manipulation.
\******************************************************************************/
/* Set the current context. */
#define jpc_mqenc_setcurctx(enc, ctxno) \
((enc)->curctx = &(enc)->ctxs[ctxno]);
/* Set the state information for a particular context. */
void jpc_mqenc_setctx(jpc_mqenc_t *enc, int ctxno, jpc_mqctx_t *ctx);
/* Set the state information for multiple contexts. */
void jpc_mqenc_setctxs(jpc_mqenc_t *enc, int numctxs, jpc_mqctx_t *ctxs);
/******************************************************************************\
* Miscellaneous functions/macros.
\******************************************************************************/
/* Get the error state of a MQ encoder. */
#define jpc_mqenc_error(enc) \
((enc)->err)
/* Get the current encoder state. */
void jpc_mqenc_getstate(jpc_mqenc_t *enc, jpc_mqencstate_t *state);
/* Terminate the code. */
int jpc_mqenc_flush(jpc_mqenc_t *enc, int termmode);
/******************************************************************************\
* Functions/macros for encoding bits.
\******************************************************************************/
/* Encode a bit. */
#if !defined(DEBUG)
#define jpc_mqenc_putbit(enc, bit) jpc_mqenc_putbit_macro(enc, bit)
#else
#define jpc_mqenc_putbit(enc, bit) jpc_mqenc_putbit_func(enc, bit)
#endif
/******************************************************************************\
* Functions/macros for debugging.
\******************************************************************************/
int jpc_mqenc_dump(jpc_mqenc_t *mqenc, FILE *out);
/******************************************************************************\
* Implementation-specific details.
\******************************************************************************/
/* Note: This macro is included only to satisfy the needs of
the mqenc_putbit macro. */
#define jpc_mqenc_putbit_macro(enc, bit) \
(((*((enc)->curctx))->mps == (bit)) ? \
(((enc)->areg -= (*(enc)->curctx)->qeval), \
((!((enc)->areg & 0x8000)) ? (jpc_mqenc_codemps2(enc)) : \
((enc)->creg += (*(enc)->curctx)->qeval))) : \
jpc_mqenc_codelps(enc))
/* Note: These function prototypes are included only to satisfy the
needs of the mqenc_putbit_macro macro. Do not call any of these
functions directly. */
int jpc_mqenc_codemps2(jpc_mqenc_t *enc);
int jpc_mqenc_codelps(jpc_mqenc_t *enc);
/* Note: This function prototype is included only to satisfy the needs of
the mqenc_putbit macro. */
int jpc_mqenc_putbit_func(jpc_mqenc_t *enc, int bit);
#endif