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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef FFMPEG_CRC_H
#define FFMPEG_CRC_H
#include <stdint.h>
#include <sys/types.h>
typedef uint32_t AVCRC;
#define AV_CRC_8_ATM 0x07
#define AV_CRC_16 0x8005
#define AV_CRC_16_CCITT 0x1021
#define AV_CRC_32_IEEE 0x04C11DB7L
//! reversed bitorder version of AV_CRC_32_IEEE
#define AV_CRC_32_IEEE_LE 0xEDB88320L
#if LIBAVUTIL_VERSION_INT < (50<<16)
extern AVCRC *av_crcEDB88320;
extern AVCRC *av_crc04C11DB7;
extern AVCRC *av_crc8005 ;
extern AVCRC *av_crc07 ;
#else
extern AVCRC av_crcEDB88320[];
extern AVCRC av_crc04C11DB7[];
extern AVCRC av_crc8005 [];
extern AVCRC av_crc07 [];
#endif
int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);
uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length);
#endif /* FFMPEG_CRC_H */
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