blob: f8ed5817b37f2d84fc75520bd99d9dd9f95db1b7
| 1 | /* |
| 2 | * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 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 |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #ifndef AVUTIL_CRC_H |
| 22 | #define AVUTIL_CRC_H |
| 23 | #if 1 |
| 24 | #include <stdint.h> |
| 25 | #else |
| 26 | typedef int intptr_t; |
| 27 | #endif |
| 28 | #include <stddef.h> |
| 29 | #include "common.h" |
| 30 | typedef uint32_t AVCRC; |
| 31 | |
| 32 | typedef enum { |
| 33 | AV_CRC_8_ATM, |
| 34 | AV_CRC_16_ANSI, |
| 35 | AV_CRC_16_CCITT, |
| 36 | AV_CRC_32_IEEE, |
| 37 | AV_CRC_32_IEEE_LE, /*< reversed bitorder version of AV_CRC_32_IEEE */ |
| 38 | AV_CRC_MAX, /*< Not part of public API! Do not use outside libavutil. */ |
| 39 | } AVCRCId; |
| 40 | |
| 41 | int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size); |
| 42 | const AVCRC *av_crc_get_table(AVCRCId crc_id); |
| 43 | uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length) av_pure; |
| 44 | |
| 45 | #endif /* AVUTIL_CRC_H */ |
| 46 | |
| 47 |