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2134
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1 /*
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2 * Copyright (c) 2011 Mans Rullgard
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3 *
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4 * This file is part of Libav.
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5 *
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6 * Libav is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
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8 * License as published by the Free Software Foundation; either
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9 * version 2.1 of the License, or (at your option) any later version.
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10 *
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11 * Libav is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * Lesser General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU Lesser General Public
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17 * License along with Libav; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
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20
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21 #ifndef AVUTIL_INTFLOAT_H
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22 #define AVUTIL_INTFLOAT_H
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23
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24 #include <stdint.h>
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25 #include "attributes.h"
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26
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27 union av_intfloat32 {
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28 uint32_t i;
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29 float f;
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30 };
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31
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32 union av_intfloat64 {
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33 uint64_t i;
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34 double f;
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35 };
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36
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37 /**
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38 * Reinterpret a 32-bit integer as a float.
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39 */
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40 static av_always_inline float av_int2float(uint32_t i)
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41 {
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42 union av_intfloat32 v;
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43 v.i = i;
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44 return v.f;
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45 }
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46
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47 /**
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48 * Reinterpret a float as a 32-bit integer.
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49 */
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50 static av_always_inline uint32_t av_float2int(float f)
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51 {
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52 union av_intfloat32 v;
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53 v.f = f;
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54 return v.i;
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55 }
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56
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57 /**
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58 * Reinterpret a 64-bit integer as a double.
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59 */
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60 static av_always_inline double av_int2double(uint64_t i)
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61 {
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62 union av_intfloat64 v;
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63 v.i = i;
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64 return v.f;
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65 }
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66
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67 /**
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68 * Reinterpret a double as a 64-bit integer.
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69 */
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70 static av_always_inline uint64_t av_double2int(double f)
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71 {
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72 union av_intfloat64 v;
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73 v.f = f;
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74 return v.i;
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75 }
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76
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77 #endif /* AVUTIL_INTFLOAT_H */
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