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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
/*
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* copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVUTIL_INTFLOAT_READWRITE_H
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#define AVUTIL_INTFLOAT_READWRITE_H
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#include <stdint.h>
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#include "attributes.h"
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/* IEEE 80 bits extended float */
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typedef struct AVExtFloat {
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uint8_t exponent[2];
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uint8_t mantissa[8];
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} AVExtFloat;
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attribute_deprecated double av_int2dbl(int64_t v) av_const;
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attribute_deprecated float av_int2flt(int32_t v) av_const;
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attribute_deprecated double av_ext2dbl(const AVExtFloat ext) av_const;
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attribute_deprecated int64_t av_dbl2int(double d) av_const;
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attribute_deprecated int32_t av_flt2int(float d) av_const;
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attribute_deprecated AVExtFloat av_dbl2ext(double d) av_const;
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#endif /* AVUTIL_INTFLOAT_READWRITE_H */
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