/*

 * 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 AVUTIL_CRC_H

#define AVUTIL_CRC_H



#include <stdint.h>

#include <stddef.h>

#include "attributes.h"



typedef uint32_t AVCRC;



typedef enum {

    AV_CRC_8_ATM,

    AV_CRC_16_ANSI,

    AV_CRC_16_CCITT,

    AV_CRC_32_IEEE,

    AV_CRC_32_IEEE_LE,  /*< reversed bitorder version of AV_CRC_32_IEEE */

    AV_CRC_MAX,         /*< Not part of public API! Do not use outside libavutil. */

}AVCRCId;



int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);

const AVCRC *av_crc_get_table(AVCRCId crc_id);

uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length) av_pure;



#endif /* AVUTIL_CRC_H */



