[deb_ffmpeg.git] / ffmpeg / libavutil / intfloat.h

/*
 * Copyright (c) 2011 Mans Rullgard
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVUTIL_INTFLOAT_H
#define AVUTIL_INTFLOAT_H

#include <stdint.h>
#include "attributes.h"

union av_intfloat32 {
    uint32_t i;
    float    f;
};

union av_intfloat64 {
    uint64_t i;
    double   f;
};

/**
 * Reinterpret a 32-bit integer as a float.
 */
static av_always_inline float av_int2float(uint32_t i)
{
    union av_intfloat32 v;
    v.i = i;
    return v.f;
}

/**
 * Reinterpret a float as a 32-bit integer.
 */
static av_always_inline uint32_t av_float2int(float f)
{
    union av_intfloat32 v;
    v.f = f;
    return v.i;
}

/**
 * Reinterpret a 64-bit integer as a double.
 */
static av_always_inline double av_int2double(uint64_t i)
{
    union av_intfloat64 v;
    v.i = i;
    return v.f;
}

/**
 * Reinterpret a double as a 64-bit integer.
 */
static av_always_inline uint64_t av_double2int(double f)
{
    union av_intfloat64 v;
    v.f = f;
    return v.i;
}

#endif /* AVUTIL_INTFLOAT_H */
Commit	Line	Data
2ba45a60 DM	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 */