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 27union av_intfloat32 { 28 uint32_t i; 29 float f; 30}; 31 32union av_intfloat64 { 33 uint64_t i; 34 double f; 35}; 36 37/** 38 * Reinterpret a 32-bit integer as a float. 39 */ 40static 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 */ 50static 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 */ 60static 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 */ 70static 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 */ 78