misc/winutils/include/libavutil/intfloat.h
changeset 7813 7ac83d79b897
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7812:00696c1450da 7813:7ac83d79b897
       
     1 /*
       
     2  * Copyright (c) 2011 Mans Rullgard
       
     3  *
       
     4  * This file is part of Libav.
       
     5  *
       
     6  * Libav 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  * Libav 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 Libav; 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 */