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 FFMPEG_CRC_H 00022 #define FFMPEG_CRC_H 00023 00024 #include <stdint.h> 00025 #include <sys/types.h> 00026 00027 typedef uint32_t AVCRC; 00028 00029 #define AV_CRC_8_ATM 0x07 00030 #define AV_CRC_16 0x8005 00031 #define AV_CRC_16_CCITT 0x1021 00032 #define AV_CRC_32_IEEE 0x04C11DB7L 00034 #define AV_CRC_32_IEEE_LE 0xEDB88320L 00035 00036 #if LIBAVUTIL_VERSION_INT < (50<<16) 00037 extern AVCRC *av_crcEDB88320; 00038 extern AVCRC *av_crc04C11DB7; 00039 extern AVCRC *av_crc8005 ; 00040 extern AVCRC *av_crc07 ; 00041 #else 00042 extern AVCRC av_crcEDB88320[]; 00043 extern AVCRC av_crc04C11DB7[]; 00044 extern AVCRC av_crc8005 []; 00045 extern AVCRC av_crc07 []; 00046 #endif 00047 00048 int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size); 00049 uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length); 00050 00051 #endif /* FFMPEG_CRC_H */ 00052
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