+++ /dev/null
-/*
- * Copyright (c) 1999-2000 Image Power, Inc. and the University of
- * British Columbia.
- * Copyright (c) 2001-2003 Michael David Adams.
- * All rights reserved.
- */
-
-/* __START_OF_JASPER_LICENSE__
- *
- * JasPer License Version 2.0
- *
- * Copyright (c) 2001-2006 Michael David Adams
- * Copyright (c) 1999-2000 Image Power, Inc.
- * Copyright (c) 1999-2000 The University of British Columbia
- *
- * All rights reserved.
- *
- * Permission is hereby granted, free of charge, to any person (the
- * "User") obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without restriction,
- * including without limitation the rights to use, copy, modify, merge,
- * publish, distribute, and/or sell copies of the Software, and to permit
- * persons to whom the Software is furnished to do so, subject to the
- * following conditions:
- *
- * 1. The above copyright notices and this permission notice (which
- * includes the disclaimer below) shall be included in all copies or
- * substantial portions of the Software.
- *
- * 2. The name of a copyright holder shall not be used to endorse or
- * promote products derived from the Software without specific prior
- * written permission.
- *
- * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
- * LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
- * THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
- * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
- * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
- * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
- * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
- * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
- * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
- * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
- * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
- * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
- * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
- * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
- * PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
- * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
- * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
- * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
- * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
- * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
- * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
- * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
- * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
- * RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
- * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
- *
- * __END_OF_JASPER_LICENSE__
- */
-
-/*
- * MQ Arithmetic Decoder
- *
- * $Id: jpc_mqdec.h,v 1.2 2008/05/26 09:40:52 vp153 Exp $
- */
-
-#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. */
- uchar 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 jpc_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
projects / opencv / blobdiff