crc.h 1.44 KB
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/*
 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
 *
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 * This file is part of FFmpeg.
 *
 * 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
 * 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
 * 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
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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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#ifndef AVUTIL_CRC_H
#define AVUTIL_CRC_H
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#include <stdint.h>
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#include <stddef.h>
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#include "common.h"
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typedef uint32_t AVCRC;

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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 */
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    AV_CRC_MAX,         /*< Not part of public API! Do not use outside libavutil. */
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}AVCRCId;
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int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);
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const AVCRC *av_crc_get_table(AVCRCId crc_id);
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uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length) av_pure;
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#endif /* AVUTIL_CRC_H */
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