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FFmpeg/libavutil/crc.h

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  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 CRC_H

  22. #define CRC_H

  23. 

  24. typedef uint32_t AVCRC;

  25. 

  26. extern AVCRC *av_crcEDB88320;

  27. extern AVCRC *av_crc04C11DB7;

  28. extern AVCRC *av_crc8005    ;

  29. extern AVCRC *av_crc07      ;

  30. 

  31. int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);

  32. uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length);

  33. 

  34. #endif /* CRC_H */