FFmpeg
intfloat.h
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1 /*
2  * Copyright (c) 2011 Mans Rullgard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVUTIL_INTFLOAT_H
22 #define AVUTIL_INTFLOAT_H
23 
24 #include <stdint.h>
25 #include "attributes.h"
26 
28  uint32_t i;
29  float f;
30 };
31 
33  uint64_t i;
34  double f;
35 };
36 
37 /**
38  * Reinterpret a 32-bit integer as a float.
39  */
40 static av_always_inline float av_int2float(uint32_t i)
41 {
42  union av_intfloat32 v;
43  v.i = i;
44  return v.f;
45 }
46 
47 /**
48  * Reinterpret a float as a 32-bit integer.
49  */
50 static av_always_inline uint32_t av_float2int(float f)
51 {
52  union av_intfloat32 v;
53  v.f = f;
54  return v.i;
55 }
56 
57 /**
58  * Reinterpret a 64-bit integer as a double.
59  */
60 static av_always_inline double av_int2double(uint64_t i)
61 {
62  union av_intfloat64 v;
63  v.i = i;
64  return v.f;
65 }
66 
67 /**
68  * Reinterpret a double as a 64-bit integer.
69  */
70 static av_always_inline uint64_t av_double2int(double f)
71 {
72  union av_intfloat64 v;
73  v.f = f;
74  return v.i;
75 }
76 
77 #endif /* AVUTIL_INTFLOAT_H */
double f
Definition: intfloat.h:34
static av_always_inline float av_int2float(uint32_t i)
Reinterpret a 32-bit integer as a float.
Definition: intfloat.h:40
static av_always_inline uint64_t av_double2int(double f)
Reinterpret a double as a 64-bit integer.
Definition: intfloat.h:70
uint64_t i
Definition: intfloat.h:33
Macro definitions for various function/variable attributes.
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
uint32_t i
Definition: intfloat.h:28
static av_always_inline uint32_t av_float2int(float f)
Reinterpret a float as a 32-bit integer.
Definition: intfloat.h:50
#define av_always_inline
Definition: attributes.h:39