1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/*
* simple math operations
* Copyright (c) 2001, 2002 Fabrice Bellard
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_MATHOPS_H
#define AVCODEC_MATHOPS_H
#include "libavutil/common.h"
#if ARCH_ARM
# include "arm/mathops.h"
#elif ARCH_AVR32
# include "avr32/mathops.h"
#elif ARCH_BFIN
# include "bfin/mathops.h"
#elif ARCH_MIPS
# include "mips/mathops.h"
#elif ARCH_PPC
# include "ppc/mathops.h"
#elif ARCH_X86
# include "x86/mathops.h"
#endif
/* generic implementation */
#ifndef MULL
# define MULL(a,b,s) (((int64_t)(a) * (int64_t)(b)) >> (s))
#endif
#ifndef MULH
//gcc 3.4 creates an incredibly bloated mess out of this
//# define MULH(a,b) (((int64_t)(a) * (int64_t)(b))>>32)
static av_always_inline int MULH(int a, int b){
return ((int64_t)(a) * (int64_t)(b))>>32;
}
#endif
#ifndef UMULH
static av_always_inline unsigned UMULH(unsigned a, unsigned b){
return ((uint64_t)(a) * (uint64_t)(b))>>32;
}
#endif
#ifndef MUL64
# define MUL64(a,b) ((int64_t)(a) * (int64_t)(b))
#endif
#ifndef MAC64
# define MAC64(d, a, b) ((d) += MUL64(a, b))
#endif
#ifndef MLS64
# define MLS64(d, a, b) ((d) -= MUL64(a, b))
#endif
/* signed 16x16 -> 32 multiply add accumulate */
#ifndef MAC16
# define MAC16(rt, ra, rb) rt += (ra) * (rb)
#endif
/* signed 16x16 -> 32 multiply */
#ifndef MUL16
# define MUL16(ra, rb) ((ra) * (rb))
#endif
#ifndef MLS16
# define MLS16(rt, ra, rb) ((rt) -= (ra) * (rb))
#endif
/* median of 3 */
#ifndef mid_pred
#define mid_pred mid_pred
static inline av_const int mid_pred(int a, int b, int c)
{
#if 0
int t= (a-b)&((a-b)>>31);
a-=t;
b+=t;
b-= (b-c)&((b-c)>>31);
b+= (a-b)&((a-b)>>31);
return b;
#else
if(a>b){
if(c>b){
if(c>a) b=a;
else b=c;
}
}else{
if(b>c){
if(c>a) b=c;
else b=a;
}
}
return b;
#endif
}
#endif
#ifndef sign_extend
static inline av_const int sign_extend(int val, unsigned bits)
{
return (val << (INT_BIT - bits)) >> (INT_BIT - bits);
}
#endif
#ifndef COPY3_IF_LT
#define COPY3_IF_LT(x, y, a, b, c, d)\
if ((y) < (x)) {\
(x) = (y);\
(a) = (b);\
(c) = (d);\
}
#endif
#endif /* AVCODEC_MATHOPS_H */
|
