OpenJPEG 2.3.0

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 OPJ_INTMATH_H
38 #define OPJ_INTMATH_H
39
48
51 /* ----------------------------------------------------------------------- */
56 static INLINE OPJ_INT32 opj_int_min(OPJ_INT32 a, OPJ_INT32 b)
57 {
58 return a < b ? a : b;
59 }
60
65 static INLINE OPJ_UINT32 opj_uint_min(OPJ_UINT32 a, OPJ_UINT32 b)
66 {
67 return a < b ? a : b;
68 }
69
74 static INLINE OPJ_INT32 opj_int_max(OPJ_INT32 a, OPJ_INT32 b)
75 {
76 return (a > b) ? a : b;
77 }
78
83 static INLINE OPJ_UINT32 opj_uint_max(OPJ_UINT32 a, OPJ_UINT32 b)
84 {
85 return (a > b) ? a : b;
86 }
87
92 static INLINE OPJ_UINT32 opj_uint_adds(OPJ_UINT32 a, OPJ_UINT32 b)
93 {
94 OPJ_UINT64 sum = (OPJ_UINT64)a + (OPJ_UINT64)b;
95 return (OPJ_UINT32)(-(OPJ_INT32)(sum >> 32)) | (OPJ_UINT32)sum;
96 }
97
102 static INLINE OPJ_UINT32 opj_uint_subs(OPJ_UINT32 a, OPJ_UINT32 b)
103 {
104 return (a >= b) ? a - b : 0;
105 }
106
116 static INLINE OPJ_INT32 opj_int_clamp(OPJ_INT32 a, OPJ_INT32 min,
117 OPJ_INT32 max)
118 {
119 if (a < min) {
120 return min;
121 }
122 if (a > max) {
123 return max;
124 }
125 return a;
126 }
127
137 static INLINE OPJ_INT64 opj_int64_clamp(OPJ_INT64 a, OPJ_INT64 min,
138 OPJ_INT64 max)
139 {
140 if (a < min) {
141 return min;
142 }
143 if (a > max) {
144 return max;
145 }
146 return a;
147 }
148
152 static INLINE OPJ_INT32 opj_int_abs(OPJ_INT32 a)
153 {
154 return a < 0 ? -a : a;
155 }
160 static INLINE OPJ_INT32 opj_int_ceildiv(OPJ_INT32 a, OPJ_INT32 b)
161 {
162 assert(b);
163 return (OPJ_INT32)(((OPJ_INT64)a + b - 1) / b);
164 }
165
170 static INLINE OPJ_UINT32 opj_uint_ceildiv(OPJ_UINT32 a, OPJ_UINT32 b)
171 {
172 assert(b);
173 return (a + b - 1) / b;
174 }
175
180 static INLINE OPJ_INT32 opj_int_ceildivpow2(OPJ_INT32 a, OPJ_INT32 b)
181 {
182 return (OPJ_INT32)((a + ((OPJ_INT64)1 << b) - 1) >> b);
183 }
184
189 static INLINE OPJ_INT32 opj_int64_ceildivpow2(OPJ_INT64 a, OPJ_INT32 b)
190 {
191 return (OPJ_INT32)((a + ((OPJ_INT64)1 << b) - 1) >> b);
192 }
193
198 static INLINE OPJ_UINT32 opj_uint_ceildivpow2(OPJ_UINT32 a, OPJ_UINT32 b)
199 {
200 return (OPJ_UINT32)((a + ((OPJ_UINT64)1U << b) - 1U) >> b);
201 }
202
207 static INLINE OPJ_INT32 opj_int_floordivpow2(OPJ_INT32 a, OPJ_INT32 b)
208 {
209 return a >> b;
210 }
215 static INLINE OPJ_INT32 opj_int_floorlog2(OPJ_INT32 a)
216 {
217 OPJ_INT32 l;
218 for (l = 0; a > 1; l++) {
219 a >>= 1;
220 }
221 return l;
222 }
227 static INLINE OPJ_UINT32 opj_uint_floorlog2(OPJ_UINT32 a)
228 {
229 OPJ_UINT32 l;
230 for (l = 0; a > 1; ++l) {
231 a >>= 1;
232 }
233 return l;
234 }
235
242 static INLINE OPJ_INT32 opj_int_fix_mul(OPJ_INT32 a, OPJ_INT32 b)
243 {
244 #if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__INTEL_COMPILER) && defined(_M_IX86)
245 OPJ_INT64 temp = __emul(a, b);
246 #else
247 OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
248 #endif
249 temp += 4096;
250 assert((temp >> 13) <= (OPJ_INT64)0x7FFFFFFF);
251 assert((temp >> 13) >= (-(OPJ_INT64)0x7FFFFFFF - (OPJ_INT64)1));
252 return (OPJ_INT32)(temp >> 13);
253 }
254
255 static INLINE OPJ_INT32 opj_int_fix_mul_t1(OPJ_INT32 a, OPJ_INT32 b)
256 {
257 #if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__INTEL_COMPILER) && defined(_M_IX86)
258 OPJ_INT64 temp = __emul(a, b);
259 #else
260 OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
261 #endif
262 temp += 4096;
263 assert((temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) <= (OPJ_INT64)0x7FFFFFFF);
264 assert((temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) >= (-(OPJ_INT64)0x7FFFFFFF -
265 (OPJ_INT64)1));
266 return (OPJ_INT32)(temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) ;
267 }
268
269 /* ----------------------------------------------------------------------- */
273
274 #endif /* OPJ_INTMATH_H */
opj_int_fix_mul_t1
static INLINE OPJ_INT32 opj_int_fix_mul_t1(OPJ_INT32 a, OPJ_INT32 b)
Definition: opj_intmath.h:255
min
Byte4_t min(Byte4_t n1, Byte4_t n2)
Definition: index_manager.c:775
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:766
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:207
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:170
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:189
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:180
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:65
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:215
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:227
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:74
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:242
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:198
opj_int64_clamp
static INLINE OPJ_INT64 opj_int64_clamp(OPJ_INT64 a, OPJ_INT64 min, OPJ_INT64 max)
Clamp an integer inside an interval
Definition: opj_intmath.h:137
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:83
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:160
T1_NMSEDEC_FRACBITS
#define T1_NMSEDEC_FRACBITS
Definition: t1.h:68
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:152
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:116
opj_uint_subs
static INLINE OPJ_UINT32 opj_uint_subs(OPJ_UINT32 a, OPJ_UINT32 b)
Get the saturated difference of two unsigned integers
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:92