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8a1cb9883f
Origin commit data
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Branch: master
Commit: 4a56ebd0b3
Author: skyjet18 <57456827+skyjet18@users.noreply.github.com>
Date: 2023-01-24 (Tue, 24 Jan 2023)
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No further description and justification available within origin commit message!
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This commit was generated by Migit
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/*
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* simple math operations
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* Copyright (c) 2001, 2002 Fabrice Bellard
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* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 AVCODEC_MATHOPS_H
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#define AVCODEC_MATHOPS_H
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#include <stdint.h>
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#include <libavutil/common.h>
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#ifndef NEG_USR32
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# define NEG_USR32(a,s) (((uint32_t)(a))>>(32-(s)))
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#endif
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#ifndef NEG_SSR32
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# define NEG_SSR32(a,s) (((int32_t)(a))>>(32-(s)))
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#endif
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#ifndef sign_extend
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static inline av_const int sign_extend(int val, unsigned bits)
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{
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unsigned shift = 8 * sizeof(int) - bits;
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union { unsigned u; int s; } v = { (unsigned) val << shift };
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return v.s >> shift;
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}
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#endif
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#ifndef zero_extend
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static inline av_const unsigned zero_extend(unsigned val, unsigned bits)
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{
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return (val << ((8 * sizeof(int)) - bits)) >> ((8 * sizeof(int)) - bits);
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}
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#endif
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#endif /* AVCODEC_MATHOPS_H */
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