00001 /* 00002 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> 00003 * 00004 * This file is part of FFmpeg. 00005 * 00006 * FFmpeg is free software; you can redistribute it and/or 00007 * modify it under the terms of the GNU Lesser General Public 00008 * License as published by the Free Software Foundation; either 00009 * version 2.1 of the License, or (at your option) any later version. 00010 * 00011 * FFmpeg is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 * Lesser General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU Lesser General Public 00017 * License along with FFmpeg; if not, write to the Free Software 00018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00019 */ 00020 00021 #ifndef AVUTIL_CRC_H 00022 #define AVUTIL_CRC_H 00023 00024 #include <stdint.h> 00025 #include <stddef.h> 00026 #include "attributes.h" 00027 00028 typedef uint32_t AVCRC; 00029 00030 typedef enum { 00031 AV_CRC_8_ATM, 00032 AV_CRC_16_ANSI, 00033 AV_CRC_16_CCITT, 00034 AV_CRC_32_IEEE, 00035 AV_CRC_32_IEEE_LE, /*< reversed bitorder version of AV_CRC_32_IEEE */ 00036 AV_CRC_MAX, /*< Not part of public API! Do not use outside libavutil. */ 00037 }AVCRCId; 00038 00039 int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size); 00040 const AVCRC *av_crc_get_table(AVCRCId crc_id); 00041 uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length) av_pure; 00042 00043 #endif /* AVUTIL_CRC_H */ 00044
1.5.8