intfloat.h (1726B)
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 */