mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-28 02:12:28 +00:00
3383a53e7d
The existing functions defined in intfloat_readwrite.[ch] are both slow and incorrect (infinities are not handled). This introduces a new header with fast, inline conversion functions using direct union punning assuming an IEEE-754 system, an assumption already made throughout the code. The one use of Intel/Motorola extended 80-bit format is replaced by simpler code sufficient under the present constraints (positive normal values). The old functions are marked deprecated and retained for compatibility. Signed-off-by: Mans Rullgard <mans@mansr.com>
41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
/*
|
|
* copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVUTIL_INTFLOAT_READWRITE_H
|
|
#define AVUTIL_INTFLOAT_READWRITE_H
|
|
|
|
#include <stdint.h>
|
|
#include "attributes.h"
|
|
|
|
/* IEEE 80 bits extended float */
|
|
typedef struct AVExtFloat {
|
|
uint8_t exponent[2];
|
|
uint8_t mantissa[8];
|
|
} AVExtFloat;
|
|
|
|
attribute_deprecated double av_int2dbl(int64_t v) av_const;
|
|
attribute_deprecated float av_int2flt(int32_t v) av_const;
|
|
attribute_deprecated double av_ext2dbl(const AVExtFloat ext) av_const;
|
|
attribute_deprecated int64_t av_dbl2int(double d) av_const;
|
|
attribute_deprecated int32_t av_flt2int(float d) av_const;
|
|
attribute_deprecated AVExtFloat av_dbl2ext(double d) av_const;
|
|
|
|
#endif /* AVUTIL_INTFLOAT_READWRITE_H */
|