OpenJPEG  2.2.0
opj_intmath.h
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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
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12  * Copyright (c) 2003-2014, Antonin Descampe
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37 #ifndef OPJ_INTMATH_H
38 #define OPJ_INTMATH_H
39 
48 
51 /* ----------------------------------------------------------------------- */
57 {
58  return a < b ? a : b;
59 }
60 
66 {
67  return a < b ? a : b;
68 }
69 
75 {
76  return (a > b) ? a : b;
77 }
78 
84 {
85  return (a > b) ? a : b;
86 }
87 
93 {
94  OPJ_UINT64 sum = (OPJ_UINT64)a + (OPJ_UINT64)b;
95  return (OPJ_UINT32)(-(OPJ_INT32)(sum >> 32)) | (OPJ_UINT32)sum;
96 }
97 
108  OPJ_INT32 max)
109 {
110  if (a < min) {
111  return min;
112  }
113  if (a > max) {
114  return max;
115  }
116  return a;
117 }
122 {
123  return a < 0 ? -a : a;
124 }
130 {
131  assert(b);
132  return (OPJ_INT32)(((OPJ_INT64)a + b - 1) / b);
133 }
134 
140 {
141  assert(b);
142  return (a + b - 1) / b;
143 }
144 
150 {
151  return (OPJ_INT32)((a + ((OPJ_INT64)1 << b) - 1) >> b);
152 }
153 
159 {
160  return (OPJ_INT32)((a + ((OPJ_INT64)1 << b) - 1) >> b);
161 }
162 
168 {
169  return (OPJ_UINT32)((a + ((OPJ_UINT64)1U << b) - 1U) >> b);
170 }
171 
177 {
178  return a >> b;
179 }
185 {
186  OPJ_INT32 l;
187  for (l = 0; a > 1; l++) {
188  a >>= 1;
189  }
190  return l;
191 }
197 {
198  OPJ_UINT32 l;
199  for (l = 0; a > 1; ++l) {
200  a >>= 1;
201  }
202  return l;
203 }
204 
212 {
213 #if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__INTEL_COMPILER) && defined(_M_IX86)
214  OPJ_INT64 temp = __emul(a, b);
215 #else
216  OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
217 #endif
218  temp += 4096;
219  assert((temp >> 13) <= (OPJ_INT64)0x7FFFFFFF);
220  assert((temp >> 13) >= (-(OPJ_INT64)0x7FFFFFFF - (OPJ_INT64)1));
221  return (OPJ_INT32)(temp >> 13);
222 }
223 
225 {
226 #if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__INTEL_COMPILER) && defined(_M_IX86)
227  OPJ_INT64 temp = __emul(a, b);
228 #else
229  OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
230 #endif
231  temp += 4096;
232  assert((temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) <= (OPJ_INT64)0x7FFFFFFF);
233  assert((temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) >= (-(OPJ_INT64)0x7FFFFFFF -
234  (OPJ_INT64)1));
235  return (OPJ_INT32)(temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) ;
236 }
237 
238 /* ----------------------------------------------------------------------- */
242 
243 #endif /* OPJ_INTMATH_H */
static INLINE OPJ_INT32 opj_int_fix_mul_t1(OPJ_INT32 a, OPJ_INT32 b)
Definition: opj_intmath.h:224
Byte4_t min(Byte4_t n1, Byte4_t n2)
Definition: index_manager.c:775
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:766
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:176
static INLINE OPJ_UINT32 opj_uint_ceildiv(OPJ_UINT32 a, OPJ_UINT32 b)
Divide an integer and round upwards.
Definition: opj_intmath.h:139
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:158
int32_t OPJ_INT32
Definition: openjpeg.h:125
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:149
static INLINE OPJ_UINT32 opj_uint_min(OPJ_UINT32 a, OPJ_UINT32 b)
Get the minimum of two integers.
Definition: opj_intmath.h:65
static INLINE OPJ_INT32 opj_int_floorlog2(OPJ_INT32 a)
Get logarithm of an integer and round downwards.
Definition: opj_intmath.h:184
uint64_t OPJ_UINT64
Definition: openjpeg.h:128
#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:196
static INLINE OPJ_INT32 opj_int_max(OPJ_INT32 a, OPJ_INT32 b)
Get the maximum of two integers.
Definition: opj_intmath.h:74
static INLINE OPJ_INT32 opj_int_fix_mul(OPJ_INT32 a, OPJ_INT32 b)
Multiply two fixed-precision rational numbers.
Definition: opj_intmath.h:211
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:167
static INLINE OPJ_UINT32 opj_uint_max(OPJ_UINT32 a, OPJ_UINT32 b)
Get the maximum of two integers.
Definition: opj_intmath.h:83
static INLINE OPJ_INT32 opj_int_ceildiv(OPJ_INT32 a, OPJ_INT32 b)
Divide an integer and round upwards.
Definition: opj_intmath.h:129
#define T1_NMSEDEC_FRACBITS
Definition: t1.h:68
uint32_t OPJ_UINT32
Definition: openjpeg.h:126
int64_t OPJ_INT64
Definition: openjpeg.h:127
static INLINE OPJ_INT32 opj_int_abs(OPJ_INT32 a)
Definition: opj_intmath.h:121
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:107
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