58 lines
2.5 KiB
C
58 lines
2.5 KiB
C
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/* libFLAC - Free Lossless Audio Codec library
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* Copyright (C) 2000,2001,2002,2003,2004,2005 Josh Coalson
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of the Xiph.org Foundation nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef FLAC__PRIVATE__CRC_H
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#define FLAC__PRIVATE__CRC_H
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#include "FLAC/ordinals.h"
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/* 8 bit CRC generator, MSB shifted first
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** polynomial = x^8 + x^2 + x^1 + x^0
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** init = 0
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*/
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extern FLAC__byte const FLAC__crc8_table[256];
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#define FLAC__CRC8_UPDATE(data, crc) (crc) = FLAC__crc8_table[(crc) ^ (data)];
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void FLAC__crc8_update(const FLAC__byte data, FLAC__uint8 *crc);
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void FLAC__crc8_update_block(const FLAC__byte *data, unsigned len, FLAC__uint8 *crc);
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FLAC__uint8 FLAC__crc8(const FLAC__byte *data, unsigned len);
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/* 16 bit CRC generator, MSB shifted first
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** polynomial = x^16 + x^15 + x^2 + x^0
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** init = 0
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*/
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extern FLAC__uint16 FLAC__crc16_table[256];
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#define FLAC__CRC16_UPDATE(data, crc) (crc) = ((crc)<<8) ^ FLAC__crc16_table[((crc)>>8) ^ (data)];
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void FLAC__crc16_update(const FLAC__byte data, FLAC__uint16 *crc);
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void FLAC__crc16_update_block(const FLAC__byte *data, unsigned len, FLAC__uint16 *crc);
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FLAC__uint16 FLAC__crc16(const FLAC__byte *data, unsigned len);
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#endif
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