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77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsLTE library.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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/**********************************************************************************************
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* File: convcoder.h
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*
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* Description: Cyclic Redundancy Check
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* LTE requires CRC lengths 8, 16, 24A and 24B, each with it's own generator
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* polynomial.
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*
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* Reference: 3GPP TS 36.212 version 10.0.0 Release 10 Sec. 5.1.1
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*********************************************************************************************/
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#ifndef CRC_
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#define CRC_
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#include "srslte/config.h"
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#include <stdint.h>
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typedef struct SRSLTE_API {
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uint64_t table[256];
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int polynom;
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int order;
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uint64_t crcinit;
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uint64_t crcmask;
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uint64_t crchighbit;
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uint32_t srslte_crc_out;
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} srslte_crc_t;
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SRSLTE_API int srslte_crc_init(srslte_crc_t *h,
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uint32_t srslte_crc_poly,
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int srslte_crc_order);
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SRSLTE_API int srslte_crc_set_init(srslte_crc_t *h,
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uint64_t init_value);
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SRSLTE_API uint32_t srslte_crc_attach(srslte_crc_t *h,
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uint8_t *data,
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int len);
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SRSLTE_API uint32_t srslte_crc_attach_byte(srslte_crc_t *h,
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uint8_t *data,
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int len);
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SRSLTE_API uint32_t srslte_crc_checksum_byte(srslte_crc_t *h,
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uint8_t *data,
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int len);
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SRSLTE_API uint32_t srslte_crc_checksum(srslte_crc_t *h,
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uint8_t *data,
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int len);
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#endif
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