vx32

Local 9vx git repository for patches.
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jpc_fix.h (6723B)


      1 /*
      2  * Copyright (c) 1999-2000 Image Power, Inc. and the University of
      3  *   British Columbia.
      4  * Copyright (c) 2001-2002 Michael David Adams.
      5  * All rights reserved.
      6  */
      7 
      8 /* __START_OF_JASPER_LICENSE__
      9  * 
     10  * JasPer License Version 2.0
     11  * 
     12  * Copyright (c) 1999-2000 Image Power, Inc.
     13  * Copyright (c) 1999-2000 The University of British Columbia
     14  * Copyright (c) 2001-2003 Michael David Adams
     15  * 
     16  * All rights reserved.
     17  * 
     18  * Permission is hereby granted, free of charge, to any person (the
     19  * "User") obtaining a copy of this software and associated documentation
     20  * files (the "Software"), to deal in the Software without restriction,
     21  * including without limitation the rights to use, copy, modify, merge,
     22  * publish, distribute, and/or sell copies of the Software, and to permit
     23  * persons to whom the Software is furnished to do so, subject to the
     24  * following conditions:
     25  * 
     26  * 1.  The above copyright notices and this permission notice (which
     27  * includes the disclaimer below) shall be included in all copies or
     28  * substantial portions of the Software.
     29  * 
     30  * 2.  The name of a copyright holder shall not be used to endorse or
     31  * promote products derived from the Software without specific prior
     32  * written permission.
     33  * 
     34  * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
     35  * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
     36  * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
     37  * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
     38  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
     39  * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO
     40  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
     41  * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
     42  * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
     43  * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
     44  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
     45  * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
     46  * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
     47  * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
     48  * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
     49  * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS
     50  * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
     51  * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE
     52  * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
     53  * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
     54  * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
     55  * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
     56  * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
     57  * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
     58  * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
     59  * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
     60  * 
     61  * __END_OF_JASPER_LICENSE__
     62  */
     63 
     64 /*
     65  * Fixed-Point Number Class
     66  *
     67  * $Id: jpc_fix.h 1918 2005-07-24 14:12:08Z baford $
     68  */
     69 
     70 #ifndef JPC_FIX_H
     71 #define JPC_FIX_H
     72 
     73 /******************************************************************************\
     74 * Includes.
     75 \******************************************************************************/
     76 
     77 #include "jasper/jas_types.h"
     78 #include "jasper/jas_fix.h"
     79 
     80 /******************************************************************************\
     81 * Basic parameters of the fixed-point type.
     82 \******************************************************************************/
     83 
     84 /* The integral type used to represent a fixed-point number.  This
     85   type must be capable of representing values from -(2^31) to 2^31-1
     86   (inclusive). */
     87 typedef int32_t jpc_fix_t;
     88 
     89 /* The integral type used to respresent higher-precision intermediate results.
     90   This type should be capable of representing values from -(2^63) to 2^63-1
     91   (inclusive). */
     92 typedef int_fast64_t jpc_fix_big_t;
     93 
     94 /* The number of bits used for the fractional part of a fixed-point number. */
     95 #define JPC_FIX_FRACBITS	13
     96 
     97 /******************************************************************************\
     98 * Instantiations of the generic fixed-point number macros for the
     99 * parameters given above.  (Too bad C does not support templates, eh?)
    100 * The purpose of these macros is self-evident if one examines the
    101 * corresponding macros in the jasper/jas_fix.h header file.
    102 \******************************************************************************/
    103 
    104 #define	JPC_FIX_ZERO	JAS_FIX_ZERO(jpc_fix_t, JPC_FIX_FRACBITS)
    105 #define	JPC_FIX_ONE		JAS_FIX_ONE(jpc_fix_t, JPC_FIX_FRACBITS)
    106 #define	JPC_FIX_HALF	JAS_FIX_HALF(jpc_fix_t, JPC_FIX_FRACBITS)
    107 
    108 #define jpc_inttofix(x)	JAS_INTTOFIX(jpc_fix_t, JPC_FIX_FRACBITS, x)
    109 #define jpc_fixtoint(x)	JAS_FIXTOINT(jpc_fix_t, JPC_FIX_FRACBITS, x)
    110 #define jpc_fixtodbl(x)	JAS_FIXTODBL(jpc_fix_t, JPC_FIX_FRACBITS, x)
    111 #define jpc_dbltofix(x)	JAS_DBLTOFIX(jpc_fix_t, JPC_FIX_FRACBITS, x)
    112 
    113 #define	jpc_fix_add(x, y)	JAS_FIX_ADD(jpc_fix_t, JPC_FIX_FRACBITS, x, y)
    114 #define	jpc_fix_sub(x, y)	JAS_FIX_SUB(jpc_fix_t, JPC_FIX_FRACBITS, x, y)
    115 #define	jpc_fix_mul(x, y) \
    116 	JAS_FIX_MUL(jpc_fix_t, JPC_FIX_FRACBITS, jpc_fix_big_t, x, y)
    117 #define	jpc_fix_mulbyint(x, y) \
    118 	JAS_FIX_MULBYINT(jpc_fix_t, JPC_FIX_FRACBITS, x, y)
    119 #define	jpc_fix_div(x, y) \
    120 	JAS_FIX_DIV(jpc_fix_t, JPC_FIX_FRACBITS, jpc_fix_big_t, x, y)
    121 #define	jpc_fix_neg(x)		JAS_FIX_NEG(jpc_fix_t, JPC_FIX_FRACBITS, x)
    122 #define	jpc_fix_asl(x, n)	JAS_FIX_ASL(jpc_fix_t, JPC_FIX_FRACBITS, x, n)
    123 #define	jpc_fix_asr(x, n)	JAS_FIX_ASR(jpc_fix_t, JPC_FIX_FRACBITS, x, n)
    124 
    125 #define jpc_fix_pluseq(x, y)	JAS_FIX_PLUSEQ(jpc_fix_t, JPC_FIX_FRACBITS, x, y)
    126 #define jpc_fix_minuseq(x, y)	JAS_FIX_MINUSEQ(jpc_fix_t, JPC_FIX_FRACBITS, x, y)
    127 #define	jpc_fix_muleq(x, y)	\
    128 	JAS_FIX_MULEQ(jpc_fix_t, JPC_FIX_FRACBITS, jpc_fix_big_t, x, y)
    129 
    130 #define	jpc_fix_abs(x)		JAS_FIX_ABS(jpc_fix_t, JPC_FIX_FRACBITS, x)
    131 #define	jpc_fix_isint(x)	JAS_FIX_ISINT(jpc_fix_t, JPC_FIX_FRACBITS, x)
    132 #define jpc_fix_sgn(x)		JAS_FIX_SGN(jpc_fix_t, JPC_FIX_FRACBITS, x)
    133 #define	jpc_fix_round(x)	JAS_FIX_ROUND(jpc_fix_t, JPC_FIX_FRACBITS, x)
    134 #define	jpc_fix_floor(x)	JAS_FIX_FLOOR(jpc_fix_t, JPC_FIX_FRACBITS, x)
    135 #define jpc_fix_trunc(x)	JAS_FIX_TRUNC(jpc_fix_t, JPC_FIX_FRACBITS, x)
    136 
    137 /******************************************************************************\
    138 * Extra macros for convenience.
    139 \******************************************************************************/
    140 
    141 /* Compute the sum of three fixed-point numbers. */
    142 #define jpc_fix_add3(x, y, z)	jpc_fix_add(jpc_fix_add(x, y), z)
    143 
    144 #endif