FFmpeg: libavutil/intfloat.h Source File

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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 */
i
#define i(width, name, range_min, range_max)
Definition cbs_h264.c:63
f
#define f(width, name)
Definition cbs_vp8.c:236
static av_always_inline uint32_t av_float2int(float f)
Reinterpret a float as a 32-bit integer.
Definition intfloat.h:50
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
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition intfloat.h:60
Macro definitions for various function/variable attributes.
#define av_always_inline
Definition attributes.h:72
Definition intfloat.h:27
float f
Definition intfloat.h:29
uint32_t i
Definition intfloat.h:28
Definition intfloat.h:32
double f
Definition intfloat.h:34
uint64_t i
Definition intfloat.h:33
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