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87 lines
3.4 KiB
C
87 lines
3.4 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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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 SRSRAN_VITERBI_H
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#define SRSRAN_VITERBI_H
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#include "srsran/config.h"
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#include <stdbool.h>
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typedef enum { SRSRAN_VITERBI_27 = 0, SRSRAN_VITERBI_29, SRSRAN_VITERBI_37, SRSRAN_VITERBI_39 } srsran_viterbi_type_t;
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typedef struct SRSRAN_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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} srsran_viterbi_t;
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SRSRAN_API int srsran_viterbi_init(srsran_viterbi_t* q,
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srsran_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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SRSRAN_API void srsran_viterbi_set_gain_quant(srsran_viterbi_t* q, float gain_quant);
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SRSRAN_API void srsran_viterbi_set_gain_quant_s(srsran_viterbi_t* q, int16_t gain_quant);
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SRSRAN_API void srsran_viterbi_free(srsran_viterbi_t* q);
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SRSRAN_API int srsran_viterbi_decode_f(srsran_viterbi_t* q, float* symbols, uint8_t* data, uint32_t frame_length);
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SRSRAN_API int srsran_viterbi_decode_s(srsran_viterbi_t* q, int16_t* symbols, uint8_t* data, uint32_t frame_length);
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SRSRAN_API int srsran_viterbi_decode_us(srsran_viterbi_t* q, uint16_t* symbols, uint8_t* data, uint32_t frame_length);
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SRSRAN_API int srsran_viterbi_decode_uc(srsran_viterbi_t* q, uint8_t* symbols, uint8_t* data, uint32_t frame_length);
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SRSRAN_API int srsran_viterbi_init_sse(srsran_viterbi_t* q,
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srsran_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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SRSRAN_API int srsran_viterbi_init_neon(srsran_viterbi_t* q,
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srsran_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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SRSRAN_API int srsran_viterbi_init_avx2(srsran_viterbi_t* q,
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srsran_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 // SRSRAN_VITERBI_H
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