intfloat.h (1689B)
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 union av_intfloat32 v; 42 v.i = i; 43 return v.f; 44 } 45 46 /** 47 * Reinterpret a float as a 32-bit integer. 48 */ 49 static av_always_inline uint32_t av_float2int(float f) { 50 union av_intfloat32 v; 51 v.f = f; 52 return v.i; 53 } 54 55 /** 56 * Reinterpret a 64-bit integer as a double. 57 */ 58 static av_always_inline double av_int2double(uint64_t i) { 59 union av_intfloat64 v; 60 v.i = i; 61 return v.f; 62 } 63 64 /** 65 * Reinterpret a double as a 64-bit integer. 66 */ 67 static av_always_inline uint64_t av_double2int(double f) { 68 union av_intfloat64 v; 69 v.f = f; 70 return v.i; 71 } 72 73 #endif /* AVUTIL_INTFLOAT_H */