mirror of https://github.com/opencv/opencv.git
Open Source Computer Vision Library
https://opencv.org/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
1.7 KiB
74 lines
1.7 KiB
13 years ago
|
/*
|
||
|
|
* Copyright (c) 2011 Mans Rullgard
|
||
|
|
*
|
||
|
|
* This file is part of Libav.
|
||
|
|
*
|
||
|
|
* Libav 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.
|
||
|
|
*
|
||
|
|
* Libav 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 Libav; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef AVUTIL_INTFLOAT_H
|
||
|
|
#define AVUTIL_INTFLOAT_H
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
#include "attributes.h"
|
||
|
|
|
||
|
|
union av_intfloat32 {
|
||
|
|
uint32_t i;
|
||
|
|
float f;
|
||
|
|
};
|
||
|
|
|
||
|
|
union av_intfloat64 {
|
||
|
|
uint64_t i;
|
||
|
|
double f;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reinterpret a 32-bit integer as a float.
|
||
|
|
*/
|
||
|
|
static av_always_inline float av_int2float(uint32_t i)
|
||
|
|
{
|
||
|
|
union av_intfloat32 v = { .i = i };
|
||
|
|
return v.f;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reinterpret a float as a 32-bit integer.
|
||
|
|
*/
|
||
|
|
static av_always_inline uint32_t av_float2int(float f)
|
||
|
|
{
|
||
|
|
union av_intfloat32 v = { .f = f };
|
||
|
|
return v.i;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reinterpret a 64-bit integer as a double.
|
||
|
|
*/
|
||
|
|
static av_always_inline double av_int2double(uint64_t i)
|
||
|
|
{
|
||
|
|
union av_intfloat64 v = { .i = i };
|
||
|
|
return v.f;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reinterpret a double as a 64-bit integer.
|
||
|
|
*/
|
||
|
|
static av_always_inline uint64_t av_double2int(double f)
|
||
|
|
{
|
||
|
|
union av_intfloat64 v = { .f = f };
|
||
|
|
return v.i;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* AVUTIL_INTFLOAT_H */
|