Reapply r12489: Add pure, const and malloc attributes to proper functions
[libav.git] / libavutil / crc.h
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1/*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg 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
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
04d7f601 10 *
b78e7197 11 * FFmpeg 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
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
b78e7197 17 * License along with FFmpeg; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
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21#ifndef FFMPEG_CRC_H
22#define FFMPEG_CRC_H
43a80cce 23
99545457 24#include <stdint.h>
768a9205 25#include <stddef.h>
99545457 26
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27typedef uint32_t AVCRC;
28
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29typedef enum {
30 AV_CRC_8_ATM,
31 AV_CRC_16_ANSI,
32 AV_CRC_16_CCITT,
33 AV_CRC_32_IEEE,
34 AV_CRC_32_IEEE_LE, /*< reversed bitorder version of AV_CRC_32_IEEE */
35 AV_CRC_MAX, /*< not part of public API! don't use outside lavu */
36}AVCRCId;
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37
38int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);
3abe5fbd 39const AVCRC *av_crc_get_table(AVCRCId crc_id);
85074d3c 40uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length) av_pure;
43a80cce 41
5b21bdab 42#endif /* FFMPEG_CRC_H */
43a80cce 43