1 /* |
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2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
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3 * |
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4 * This file is part of Libav. |
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5 * |
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6 * Libav is free software; you can redistribute it and/or |
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7 * modify it under the terms of the GNU Lesser General Public |
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8 * License as published by the Free Software Foundation; either |
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9 * version 2.1 of the License, or (at your option) any later version. |
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10 * |
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11 * Libav is distributed in the hope that it will be useful, |
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 * Lesser General Public License for more details. |
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15 * |
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16 * You should have received a copy of the GNU Lesser General Public |
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17 * License along with Libav; if not, write to the Free Software |
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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19 */ |
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20 |
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21 #ifndef AVUTIL_CRC_H |
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22 #define AVUTIL_CRC_H |
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23 |
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24 #include <stdint.h> |
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25 #include <stddef.h> |
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26 #include "attributes.h" |
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27 |
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28 typedef uint32_t AVCRC; |
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29 |
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30 typedef enum { |
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31 AV_CRC_8_ATM, |
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32 AV_CRC_16_ANSI, |
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33 AV_CRC_16_CCITT, |
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34 AV_CRC_32_IEEE, |
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35 AV_CRC_32_IEEE_LE, /*< reversed bitorder version of AV_CRC_32_IEEE */ |
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36 AV_CRC_MAX, /*< Not part of public API! Do not use outside libavutil. */ |
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37 }AVCRCId; |
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38 |
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39 int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size); |
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40 const AVCRC *av_crc_get_table(AVCRCId crc_id); |
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41 uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length) av_pure; |
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42 |
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43 #endif /* AVUTIL_CRC_H */ |
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