yading@11: /*
yading@11:  * Copyright (c) 2011 Mans Rullgard
yading@11:  *
yading@11:  * This file is part of Libav.
yading@11:  *
yading@11:  * Libav is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * Libav is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with Libav; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #ifndef AVUTIL_INTFLOAT_H
yading@11: #define AVUTIL_INTFLOAT_H
yading@11: 
yading@11: #include <stdint.h>
yading@11: #include "attributes.h"
yading@11: 
yading@11: union av_intfloat32 {
yading@11:     uint32_t i;
yading@11:     float    f;
yading@11: };
yading@11: 
yading@11: union av_intfloat64 {
yading@11:     uint64_t i;
yading@11:     double   f;
yading@11: };
yading@11: 
yading@11: /**
yading@11:  * Reinterpret a 32-bit integer as a float.
yading@11:  */
yading@11: static av_always_inline float av_int2float(uint32_t i)
yading@11: {
yading@11:     union av_intfloat32 v;
yading@11:     v.i = i;
yading@11:     return v.f;
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Reinterpret a float as a 32-bit integer.
yading@11:  */
yading@11: static av_always_inline uint32_t av_float2int(float f)
yading@11: {
yading@11:     union av_intfloat32 v;
yading@11:     v.f = f;
yading@11:     return v.i;
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Reinterpret a 64-bit integer as a double.
yading@11:  */
yading@11: static av_always_inline double av_int2double(uint64_t i)
yading@11: {
yading@11:     union av_intfloat64 v;
yading@11:     v.i = i;
yading@11:     return v.f;
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Reinterpret a double as a 64-bit integer.
yading@11:  */
yading@11: static av_always_inline uint64_t av_double2int(double f)
yading@11: {
yading@11:     union av_intfloat64 v;
yading@11:     v.f = f;
yading@11:     return v.i;
yading@11: }
yading@11: 
yading@11: #endif /* AVUTIL_INTFLOAT_H */