OpenJPEG: opj_intmath.h Source File

OpenJPEG 2.5.0

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
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 (OPJ_UINT32)(((OPJ_UINT64)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}
211
216 static INLINE OPJ_UINT32 opj_uint_floordivpow2(OPJ_UINT32 a, OPJ_UINT32 b)
217{
218 return a >> b;
219}
220
225 static INLINE OPJ_INT32 opj_int_floorlog2(OPJ_INT32 a)
226{
227 OPJ_INT32 l;
228 for (l = 0; a > 1; l++) {
229 a >>= 1;
230 }
231 return l;
232}
237 static INLINE OPJ_UINT32 opj_uint_floorlog2(OPJ_UINT32 a)
238{
239 OPJ_UINT32 l;
240 for (l = 0; a > 1; ++l) {
241 a >>= 1;
242 }
243 return l;
244}
245
252 static INLINE OPJ_INT32 opj_int_fix_mul(OPJ_INT32 a, OPJ_INT32 b)
253{
254#if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__INTEL_COMPILER) && defined(_M_IX86)
255 OPJ_INT64 temp = __emul(a, b);
256#else
257 OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
258#endif
259 temp += 4096;
260 assert((temp >> 13) <= (OPJ_INT64)0x7FFFFFFF);
261 assert((temp >> 13) >= (-(OPJ_INT64)0x7FFFFFFF - (OPJ_INT64)1));
262 return (OPJ_INT32)(temp >> 13);
263}
264
265 static INLINE OPJ_INT32 opj_int_fix_mul_t1(OPJ_INT32 a, OPJ_INT32 b)
266{
267#if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__INTEL_COMPILER) && defined(_M_IX86)
268 OPJ_INT64 temp = __emul(a, b);
269#else
270 OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
271#endif
272 temp += 4096;
273 assert((temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) <= (OPJ_INT64)0x7FFFFFFF);
274 assert((temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) >= (-(OPJ_INT64)0x7FFFFFFF -
275 (OPJ_INT64)1));
276 return (OPJ_INT32)(temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) ;
277}
278
286 static INLINE OPJ_INT32 opj_int_add_no_overflow(OPJ_INT32 a, OPJ_INT32 b)
287{
288 void* pa = &a;
289 void* pb = &b;
290 OPJ_UINT32* upa = (OPJ_UINT32*)pa;
291 OPJ_UINT32* upb = (OPJ_UINT32*)pb;
292 OPJ_UINT32 ures = *upa + *upb;
293 void* pures = &ures;
294 OPJ_INT32* ipres = (OPJ_INT32*)pures;
295 return *ipres;
296}
297
305 static INLINE OPJ_INT32 opj_int_sub_no_overflow(OPJ_INT32 a, OPJ_INT32 b)
306{
307 void* pa = &a;
308 void* pb = &b;
309 OPJ_UINT32* upa = (OPJ_UINT32*)pa;
310 OPJ_UINT32* upb = (OPJ_UINT32*)pb;
311 OPJ_UINT32 ures = *upa - *upb;
312 void* pures = &ures;
313 OPJ_INT32* ipres = (OPJ_INT32*)pures;
314 return *ipres;
315}
316
317/* ----------------------------------------------------------------------- */
321
322#endif /* OPJ_INTMATH_H */
min
Byte4_t min(Byte4_t n1, Byte4_t n2)
Definition: index_manager.c:783
max
Byte4_t max(Byte4_t n1, Byte4_t n2)
Definition: index_manager.c:774
INLINE
#define INLINE
Definition: openjpeg.h:65
OPJ_INT32
int32_t OPJ_INT32
Definition: openjpeg.h:131
OPJ_UINT32
uint32_t OPJ_UINT32
Definition: openjpeg.h:132
OPJ_INT64
int64_t OPJ_INT64
Definition: openjpeg.h:133
OPJ_UINT64
uint64_t OPJ_UINT64
Definition: openjpeg.h:134
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_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_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_add_no_overflow
static INLINE OPJ_INT32 opj_int_add_no_overflow(OPJ_INT32 a, OPJ_INT32 b)
Addition two signed integers with a wrap-around behaviour.
Definition: opj_intmath.h:286
opj_int_sub_no_overflow
static INLINE OPJ_INT32 opj_int_sub_no_overflow(OPJ_INT32 a, OPJ_INT32 b)
Subtract two signed integers with a wrap-around behaviour.
Definition: opj_intmath.h:305
opj_int_fix_mul_t1
static INLINE OPJ_INT32 opj_int_fix_mul_t1(OPJ_INT32 a, OPJ_INT32 b)
Definition: opj_intmath.h:265
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_uint_floordivpow2
static INLINE OPJ_UINT32 opj_uint_floordivpow2(OPJ_UINT32 a, OPJ_UINT32 b)
Divide an integer by a power of 2 and round downwards.
Definition: opj_intmath.h:216
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:237
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:252
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:225
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_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
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
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
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_int_abs
static INLINE OPJ_INT32 opj_int_abs(OPJ_INT32 a)
Definition: opj_intmath.h:152
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_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_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_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
T1_NMSEDEC_FRACBITS
#define T1_NMSEDEC_FRACBITS
Definition: t1.h:68