srsLTE/lib/include/srslte/phy/fec/crc.h

77 lines
2.5 KiB
C

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