OpenJPEG: opj_intmath.h Source File

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opj_intmath.h
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1 /*
2 * The copyright in this software is being made available under the 2-clauses
3 * BSD License, included below. This software may be subject to other third
4 * party and contributor rights, including patent rights, and no such rights
5 * are granted under this license.
6 *
7 * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
8 * Copyright (c) 2002-2014, Professor Benoit Macq
9 * Copyright (c) 2001-2003, David Janssens
10 * Copyright (c) 2002-2003, Yannick Verschueren
11 * Copyright (c) 2003-2007, Francois-Olivier Devaux
12 * Copyright (c) 2003-2014, Antonin Descampe
13 * Copyright (c) 2005, Herve Drolon, FreeImage Team
14 * All rights reserved.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37 #ifndef __INT_H
38 #define __INT_H
39
48
51 /* ----------------------------------------------------------------------- */
56 static INLINE OPJ_INT32 opj_int_min(OPJ_INT32 a, OPJ_INT32 b) {
57 return a < b ? a : b;
58 }
59
64 static INLINE OPJ_UINT32 opj_uint_min(OPJ_UINT32 a, OPJ_UINT32 b) {
65 return a < b ? a : b;
66 }
67
72 static INLINE OPJ_INT32 opj_int_max(OPJ_INT32 a, OPJ_INT32 b) {
73 return (a > b) ? a : b;
74 }
75
80 static INLINE OPJ_UINT32 opj_uint_max(OPJ_UINT32 a, OPJ_UINT32 b) {
81 return (a > b) ? a : b;
82 }
83
88 static INLINE OPJ_UINT32 opj_uint_adds(OPJ_UINT32 a, OPJ_UINT32 b) {
89 OPJ_UINT64 sum = (OPJ_UINT64)a + (OPJ_UINT64)b;
90 return (OPJ_UINT32)(-(OPJ_INT32)(sum >> 32)) | (OPJ_UINT32)sum;
91 }
92
102 static INLINE OPJ_INT32 opj_int_clamp(OPJ_INT32 a, OPJ_INT32 min, OPJ_INT32 max) {
103 if (a < min)
104 return min;
105 if (a > max)
106 return max;
107 return a;
108 }
112 static INLINE OPJ_INT32 opj_int_abs(OPJ_INT32 a) {
113 return a < 0 ? -a : a;
114 }
119 static INLINE OPJ_INT32 opj_int_ceildiv(OPJ_INT32 a, OPJ_INT32 b) {
120 assert(b);
121 return (a + b - 1) / b;
122 }
123
128 static INLINE OPJ_UINT32 opj_uint_ceildiv(OPJ_UINT32 a, OPJ_UINT32 b) {
129 assert(b);
130 return (a + b - 1) / b;
131 }
132
137 static INLINE OPJ_INT32 opj_int_ceildivpow2(OPJ_INT32 a, OPJ_INT32 b) {
138 return (OPJ_INT32)((a + ((OPJ_INT64)1 << b) - 1) >> b);
139 }
140
145 static INLINE OPJ_INT32 opj_int64_ceildivpow2(OPJ_INT64 a, OPJ_INT32 b) {
146 return (OPJ_INT32)((a + ((OPJ_INT64)1 << b) - 1) >> b);
147 }
148
153 static INLINE OPJ_UINT32 opj_uint_ceildivpow2(OPJ_UINT32 a, OPJ_UINT32 b) {
154 return (OPJ_UINT32)((a + ((OPJ_UINT64)1U << b) - 1U) >> b);
155 }
156
161 static INLINE OPJ_INT32 opj_int_floordivpow2(OPJ_INT32 a, OPJ_INT32 b) {
162 return a >> b;
163 }
168 static INLINE OPJ_INT32 opj_int_floorlog2(OPJ_INT32 a) {
169 OPJ_INT32 l;
170 for (l = 0; a > 1; l++) {
171 a >>= 1;
172 }
173 return l;
174 }
179 static INLINE OPJ_UINT32 opj_uint_floorlog2(OPJ_UINT32 a) {
180 OPJ_UINT32 l;
181 for (l = 0; a > 1; ++l)
182 {
183 a >>= 1;
184 }
185 return l;
186 }
187
194 static INLINE OPJ_INT32 opj_int_fix_mul(OPJ_INT32 a, OPJ_INT32 b) {
195 #if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__INTEL_COMPILER) && defined(_M_IX86)
196 OPJ_INT64 temp = __emul(a, b);
197 #else
198 OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
199 #endif
200 temp += 4096;
201 assert((temp >> 13) <= (OPJ_INT64)0x7FFFFFFF);
202 assert((temp >> 13) >= (-(OPJ_INT64)0x7FFFFFFF - (OPJ_INT64)1));
203 return (OPJ_INT32) (temp >> 13);
204 }
205
206 static INLINE OPJ_INT32 opj_int_fix_mul_t1(OPJ_INT32 a, OPJ_INT32 b) {
207 #if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__INTEL_COMPILER) && defined(_M_IX86)
208 OPJ_INT64 temp = __emul(a, b);
209 #else
210 OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
211 #endif
212 temp += 4096;
213 assert((temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) <= (OPJ_INT64)0x7FFFFFFF);
214 assert((temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) >= (-(OPJ_INT64)0x7FFFFFFF - (OPJ_INT64)1));
215 return (OPJ_INT32) (temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) ;
216 }
217
218 /* ----------------------------------------------------------------------- */
222
223 #endif
opj_int_fix_mul_t1
static INLINE OPJ_INT32 opj_int_fix_mul_t1(OPJ_INT32 a, OPJ_INT32 b)
Definition: opj_intmath.h:206
min
Byte4_t min(Byte4_t n1, Byte4_t n2)
Definition: index_manager.c:717
opj_int_min
static INLINE OPJ_INT32 opj_int_min(OPJ_INT32 a, OPJ_INT32 b)
Get the minimum of two integers.
Definition: opj_intmath.h:56
max
Byte4_t max(Byte4_t n1, Byte4_t n2)
Definition: index_manager.c:709
opj_int_floordivpow2
static INLINE OPJ_INT32 opj_int_floordivpow2(OPJ_INT32 a, OPJ_INT32 b)
Divide an integer by a power of 2 and round downwards.
Definition: opj_intmath.h:161
opj_uint_ceildiv
static INLINE OPJ_UINT32 opj_uint_ceildiv(OPJ_UINT32 a, OPJ_UINT32 b)
Divide an integer and round upwards.
Definition: opj_intmath.h:128
opj_int64_ceildivpow2
static INLINE OPJ_INT32 opj_int64_ceildivpow2(OPJ_INT64 a, OPJ_INT32 b)
Divide a 64bits integer by a power of 2 and round upwards.
Definition: opj_intmath.h:145
OPJ_INT32
int32_t OPJ_INT32
Definition: openjpeg.h:125
opj_int_ceildivpow2
static INLINE OPJ_INT32 opj_int_ceildivpow2(OPJ_INT32 a, OPJ_INT32 b)
Divide an integer by a power of 2 and round upwards.
Definition: opj_intmath.h:137
opj_uint_min
static INLINE OPJ_UINT32 opj_uint_min(OPJ_UINT32 a, OPJ_UINT32 b)
Get the minimum of two integers.
Definition: opj_intmath.h:64
opj_int_floorlog2
static INLINE OPJ_INT32 opj_int_floorlog2(OPJ_INT32 a)
Get logarithm of an integer and round downwards.
Definition: opj_intmath.h:168
OPJ_UINT64
uint64_t OPJ_UINT64
Definition: openjpeg.h:128
INLINE
#define INLINE
Definition: openjpeg.h:65
opj_uint_floorlog2
static INLINE OPJ_UINT32 opj_uint_floorlog2(OPJ_UINT32 a)
Get logarithm of an integer and round downwards.
Definition: opj_intmath.h:179
opj_int_max
static INLINE OPJ_INT32 opj_int_max(OPJ_INT32 a, OPJ_INT32 b)
Get the maximum of two integers.
Definition: opj_intmath.h:72
opj_int_fix_mul
static INLINE OPJ_INT32 opj_int_fix_mul(OPJ_INT32 a, OPJ_INT32 b)
Multiply two fixed-precision rational numbers.
Definition: opj_intmath.h:194
opj_uint_ceildivpow2
static INLINE OPJ_UINT32 opj_uint_ceildivpow2(OPJ_UINT32 a, OPJ_UINT32 b)
Divide an integer by a power of 2 and round upwards.
Definition: opj_intmath.h:153
opj_uint_max
static INLINE OPJ_UINT32 opj_uint_max(OPJ_UINT32 a, OPJ_UINT32 b)
Get the maximum of two integers.
Definition: opj_intmath.h:80
opj_int_ceildiv
static INLINE OPJ_INT32 opj_int_ceildiv(OPJ_INT32 a, OPJ_INT32 b)
Divide an integer and round upwards.
Definition: opj_intmath.h:119
T1_NMSEDEC_FRACBITS
#define T1_NMSEDEC_FRACBITS
Definition: t1.h:87
OPJ_UINT32
uint32_t OPJ_UINT32
Definition: openjpeg.h:126
OPJ_INT64
int64_t OPJ_INT64
Definition: openjpeg.h:127
opj_int_abs
static INLINE OPJ_INT32 opj_int_abs(OPJ_INT32 a)
Definition: opj_intmath.h:112
opj_int_clamp
static INLINE OPJ_INT32 opj_int_clamp(OPJ_INT32 a, OPJ_INT32 min, OPJ_INT32 max)
Clamp an integer inside an interval.
Definition: opj_intmath.h:102
opj_uint_adds
static INLINE OPJ_UINT32 opj_uint_adds(OPJ_UINT32 a, OPJ_UINT32 b)
Get the saturated sum of two unsigned integers.
Definition: opj_intmath.h:88