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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 | ||
27 | union av_intfloat32 { | |
28 | uint32_t i; | |
29 | float f; | |
30 | }; | |
31 | ||
32 | union av_intfloat64 { | |
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 */ |