Add FFMPEG_ prefix to all multiple inclusion guards.
[libav.git] / libavutil / crc.h
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 FFMPEG_CRC_H
22 #define FFMPEG_CRC_H
23
24 #include <stdint.h>
25 #include <sys/types.h>
26
27 typedef uint32_t AVCRC;
28
29 #define AV_CRC_8_ATM 0x07
30 #define AV_CRC_16 0x8005
31 #define AV_CRC_16_CCITT 0x1021
32 #define AV_CRC_32_IEEE 0x04C11DB7L
33 //! reversed bitorder version of AV_CRC_32_IEEE
34 #define AV_CRC_32_IEEE_LE 0xEDB88320L
35
36 #if LIBAVUTIL_VERSION_INT < (50<<16)
37 extern AVCRC *av_crcEDB88320;
38 extern AVCRC *av_crc04C11DB7;
39 extern AVCRC *av_crc8005 ;
40 extern AVCRC *av_crc07 ;
41 #else
42 extern AVCRC av_crcEDB88320[];
43 extern AVCRC av_crc04C11DB7[];
44 extern AVCRC av_crc8005 [];
45 extern AVCRC av_crc07 [];
46 #endif
47
48 int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);
49 uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length);
50
51 #endif /* FFMPEG_CRC_H */
52