OpenJPEG  2.1.0
opj_intmath.h
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1 /*
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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
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37 #ifndef __INT_H
38 #define __INT_H
39 
48 
51 /* ----------------------------------------------------------------------- */
57  return a < b ? a : b;
58 }
59 
65  return a < b ? a : b;
66 }
67 
73  return (a > b) ? a : b;
74 }
75 
81  return (a > b) ? a : b;
82 }
83 
94  if (a < min)
95  return min;
96  if (a > max)
97  return max;
98  return a;
99 }
104  return a < 0 ? -a : a;
105 }
111  assert(b);
112  return (a + b - 1) / b;
113 }
114 
120  return (a + b - 1) / b;
121 }
122 
128  return (OPJ_INT32)((a + (OPJ_INT64)(1 << b) - 1) >> b);
129 }
135  return a >> b;
136 }
142  OPJ_INT32 l;
143  for (l = 0; a > 1; l++) {
144  a >>= 1;
145  }
146  return l;
147 }
153  OPJ_UINT32 l;
154  for (l = 0; a > 1; ++l)
155  {
156  a >>= 1;
157  }
158  return l;
159 }
160 
168  OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
169  temp += temp & 4096;
170  return (OPJ_INT32) (temp >> 13) ;
171 }
172 
173 /* ----------------------------------------------------------------------- */
177 
178 #endif
Byte4_t min(Byte4_t n1, Byte4_t n2)
Definition: index_manager.c:717
static INLINE OPJ_INT32 opj_int_min(OPJ_INT32 a, OPJ_INT32 b)
Get the minimum of two integers.
Definition: opj_intmath.h:56
Byte4_t max(Byte4_t n1, Byte4_t n2)
Definition: index_manager.c:709
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:134
static INLINE OPJ_UINT32 opj_uint_ceildiv(OPJ_UINT32 a, OPJ_UINT32 b)
Divide an integer and round upwards.
Definition: opj_intmath.h:119
int32_t OPJ_INT32
Definition: openjpeg.h:121
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:127
static INLINE OPJ_UINT32 opj_uint_min(OPJ_UINT32 a, OPJ_UINT32 b)
Get the minimum of two integers.
Definition: opj_intmath.h:64
static INLINE OPJ_INT32 opj_int_floorlog2(OPJ_INT32 a)
Get logarithm of an integer and round downwards.
Definition: opj_intmath.h:141
#define INLINE
Definition: openjpeg.h:65
static INLINE OPJ_UINT32 opj_uint_floorlog2(OPJ_UINT32 a)
Get logarithm of an integer and round downwards.
Definition: opj_intmath.h:152
static INLINE OPJ_INT32 opj_int_max(OPJ_INT32 a, OPJ_INT32 b)
Get the maximum of two integers.
Definition: opj_intmath.h:72
static INLINE OPJ_INT32 opj_int_fix_mul(OPJ_INT32 a, OPJ_INT32 b)
Multiply two fixed-precision rational numbers.
Definition: opj_intmath.h:167
static INLINE OPJ_UINT32 opj_uint_max(OPJ_UINT32 a, OPJ_UINT32 b)
Get the maximum of two integers.
Definition: opj_intmath.h:80
static INLINE OPJ_INT32 opj_int_ceildiv(OPJ_INT32 a, OPJ_INT32 b)
Divide an integer and round upwards.
Definition: opj_intmath.h:110
uint32_t OPJ_UINT32
Definition: openjpeg.h:122
int64_t OPJ_INT64
Definition: openjpeg.h:123
static INLINE OPJ_INT32 opj_int_abs(OPJ_INT32 a)
Definition: opj_intmath.h:103
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:93