mirror of
https://github.com/FFmpeg/FFmpeg.git
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53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/*
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* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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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 CRC_H
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#define CRC_H
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#include <stdint.h>
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#include <sys/types.h>
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typedef uint32_t AVCRC;
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#define AV_CRC_8_ATM 0x07
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#define AV_CRC_16 0x8005
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#define AV_CRC_16_CCITT 0x1021
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#define AV_CRC_32_IEEE 0x04C11DB7L
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//! reversed bitorder version of AV_CRC_32_IEEE
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#define AV_CRC_32_IEEE_LE 0xEDB88320L
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#if LIBAVUTIL_VERSION_INT < (50<<16)
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extern AVCRC *av_crcEDB88320;
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extern AVCRC *av_crc04C11DB7;
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extern AVCRC *av_crc8005 ;
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extern AVCRC *av_crc07 ;
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#else
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extern AVCRC av_crcEDB88320[];
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extern AVCRC av_crc04C11DB7[];
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extern AVCRC av_crc8005 [];
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extern AVCRC av_crc07 [];
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#endif
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int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);
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uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length);
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#endif /* CRC_H */
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