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123 lines
4.2 KiB
C
123 lines
4.2 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: viterbi.h
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*
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* Description: Viterbi decoder for convolutionally encoded data.
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* Used for decoding of PBCH and PDCCH (type 37 decoder).
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*
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* Reference:
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*****************************************************************************/
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#ifndef SRSLTE_VITERBI_H
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#define SRSLTE_VITERBI_H
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#include <stdbool.h>
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#include "srslte/config.h"
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typedef enum {
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SRSLTE_VITERBI_27 = 0,
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SRSLTE_VITERBI_29,
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SRSLTE_VITERBI_37,
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SRSLTE_VITERBI_39
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}srslte_viterbi_type_t;
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typedef struct SRSLTE_API{
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void *ptr;
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uint32_t R;
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uint32_t K;
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uint32_t framebits;
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bool tail_biting;
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float gain_quant;
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int16_t gain_quant_s;
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int (*decode) (void*, uint8_t*, uint8_t*, uint32_t);
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int (*decode_s) (void*, uint16_t*, uint8_t*, uint32_t);
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int (*decode_f) (void*, float*, uint8_t*, uint32_t);
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void (*free) (void*);
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uint8_t *tmp;
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uint16_t *tmp_s;
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uint8_t *symbols_uc;
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uint16_t *symbols_us;
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}srslte_viterbi_t;
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SRSLTE_API int srslte_viterbi_init(srslte_viterbi_t *q,
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srslte_viterbi_type_t type,
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int poly[3],
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uint32_t max_frame_length,
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bool tail_bitting);
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SRSLTE_API void srslte_viterbi_set_gain_quant(srslte_viterbi_t *q,
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float gain_quant);
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SRSLTE_API void srslte_viterbi_set_gain_quant_s(srslte_viterbi_t *q,
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int16_t gain_quant);
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SRSLTE_API void srslte_viterbi_free(srslte_viterbi_t *q);
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SRSLTE_API int srslte_viterbi_decode_f(srslte_viterbi_t *q,
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float *symbols,
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uint8_t *data,
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uint32_t frame_length);
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SRSLTE_API int srslte_viterbi_decode_s(srslte_viterbi_t *q,
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int16_t *symbols,
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uint8_t *data,
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uint32_t frame_length);
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SRSLTE_API int srslte_viterbi_decode_us(srslte_viterbi_t *q, uint16_t *symbols, uint8_t *data, uint32_t frame_length);
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SRSLTE_API int srslte_viterbi_decode_uc(srslte_viterbi_t *q,
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uint8_t *symbols,
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uint8_t *data,
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uint32_t frame_length);
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SRSLTE_API int srslte_viterbi_init_sse(srslte_viterbi_t *q,
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srslte_viterbi_type_t type,
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int poly[3],
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uint32_t max_frame_length,
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bool tail_bitting);
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SRSLTE_API int srslte_viterbi_init_neon(srslte_viterbi_t *q,
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srslte_viterbi_type_t type,
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int poly[3],
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uint32_t max_frame_length,
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bool tail_bitting);
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SRSLTE_API int srslte_viterbi_init_avx2(srslte_viterbi_t *q,
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srslte_viterbi_type_t type,
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int poly[3],
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uint32_t max_frame_length,
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bool tail_bitting);
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#endif // SRSLTE_VITERBI_H
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