145 lines
6.6 KiB
C
145 lines
6.6 KiB
C
/*
|
|
* 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 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__
|
|
*/
|
|
|
|
/*
|
|
* Fixed-Point Number Class
|
|
*
|
|
* $Id: jpc_fix.h,v 1.2 2008-05-26 09:40:52 vp153 Exp $
|
|
*/
|
|
|
|
#ifndef JPC_FIX_H
|
|
#define JPC_FIX_H
|
|
|
|
/******************************************************************************\
|
|
* Includes.
|
|
\******************************************************************************/
|
|
|
|
#include "jasper/jas_types.h"
|
|
#include "jasper/jas_fix.h"
|
|
|
|
/******************************************************************************\
|
|
* Basic parameters of the fixed-point type.
|
|
\******************************************************************************/
|
|
|
|
/* The integral type used to represent a fixed-point number. This
|
|
type must be capable of representing values from -(2^31) to 2^31-1
|
|
(inclusive). */
|
|
typedef int_fast32_t jpc_fix_t;
|
|
|
|
/* The integral type used to respresent higher-precision intermediate results.
|
|
This type should be capable of representing values from -(2^63) to 2^63-1
|
|
(inclusive). */
|
|
typedef int_fast64_t jpc_fix_big_t;
|
|
|
|
/* The number of bits used for the fractional part of a fixed-point number. */
|
|
#define JPC_FIX_FRACBITS 13
|
|
|
|
/******************************************************************************\
|
|
* Instantiations of the generic fixed-point number macros for the
|
|
* parameters given above. (Too bad C does not support templates, eh?)
|
|
* The purpose of these macros is self-evident if one examines the
|
|
* corresponding macros in the jasper/jas_fix.h header file.
|
|
\******************************************************************************/
|
|
|
|
#define JPC_FIX_ZERO JAS_FIX_ZERO(jpc_fix_t, JPC_FIX_FRACBITS)
|
|
#define JPC_FIX_ONE JAS_FIX_ONE(jpc_fix_t, JPC_FIX_FRACBITS)
|
|
#define JPC_FIX_HALF JAS_FIX_HALF(jpc_fix_t, JPC_FIX_FRACBITS)
|
|
|
|
#define jpc_inttofix(x) JAS_INTTOFIX(jpc_fix_t, JPC_FIX_FRACBITS, x)
|
|
#define jpc_fixtoint(x) JAS_FIXTOINT(jpc_fix_t, JPC_FIX_FRACBITS, x)
|
|
#define jpc_fixtodbl(x) JAS_FIXTODBL(jpc_fix_t, JPC_FIX_FRACBITS, x)
|
|
#define jpc_dbltofix(x) JAS_DBLTOFIX(jpc_fix_t, JPC_FIX_FRACBITS, x)
|
|
|
|
#define jpc_fix_add(x, y) JAS_FIX_ADD(jpc_fix_t, JPC_FIX_FRACBITS, x, y)
|
|
#define jpc_fix_sub(x, y) JAS_FIX_SUB(jpc_fix_t, JPC_FIX_FRACBITS, x, y)
|
|
#define jpc_fix_mul(x, y) \
|
|
JAS_FIX_MUL(jpc_fix_t, JPC_FIX_FRACBITS, jpc_fix_big_t, x, y)
|
|
#define jpc_fix_mulbyint(x, y) \
|
|
JAS_FIX_MULBYINT(jpc_fix_t, JPC_FIX_FRACBITS, x, y)
|
|
#define jpc_fix_div(x, y) \
|
|
JAS_FIX_DIV(jpc_fix_t, JPC_FIX_FRACBITS, jpc_fix_big_t, x, y)
|
|
#define jpc_fix_neg(x) JAS_FIX_NEG(jpc_fix_t, JPC_FIX_FRACBITS, x)
|
|
#define jpc_fix_asl(x, n) JAS_FIX_ASL(jpc_fix_t, JPC_FIX_FRACBITS, x, n)
|
|
#define jpc_fix_asr(x, n) JAS_FIX_ASR(jpc_fix_t, JPC_FIX_FRACBITS, x, n)
|
|
|
|
#define jpc_fix_pluseq(x, y) JAS_FIX_PLUSEQ(jpc_fix_t, JPC_FIX_FRACBITS, x, y)
|
|
#define jpc_fix_minuseq(x, y) JAS_FIX_MINUSEQ(jpc_fix_t, JPC_FIX_FRACBITS, x, y)
|
|
#define jpc_fix_muleq(x, y) \
|
|
JAS_FIX_MULEQ(jpc_fix_t, JPC_FIX_FRACBITS, jpc_fix_big_t, x, y)
|
|
|
|
#define jpc_fix_abs(x) JAS_FIX_ABS(jpc_fix_t, JPC_FIX_FRACBITS, x)
|
|
#define jpc_fix_isint(x) JAS_FIX_ISINT(jpc_fix_t, JPC_FIX_FRACBITS, x)
|
|
#define jpc_fix_sgn(x) JAS_FIX_SGN(jpc_fix_t, JPC_FIX_FRACBITS, x)
|
|
#define jpc_fix_round(x) JAS_FIX_ROUND(jpc_fix_t, JPC_FIX_FRACBITS, x)
|
|
#define jpc_fix_floor(x) JAS_FIX_FLOOR(jpc_fix_t, JPC_FIX_FRACBITS, x)
|
|
#define jpc_fix_trunc(x) JAS_FIX_TRUNC(jpc_fix_t, JPC_FIX_FRACBITS, x)
|
|
|
|
/******************************************************************************\
|
|
* Extra macros for convenience.
|
|
\******************************************************************************/
|
|
|
|
/* Compute the sum of three fixed-point numbers. */
|
|
#define jpc_fix_add3(x, y, z) jpc_fix_add(jpc_fix_add(x, y), z)
|
|
|
|
#endif
|