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52 lines
1.6 KiB
52 lines
1.6 KiB
/* |
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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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