| 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 */ |