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91 lines
3.4 KiB
C
91 lines
3.4 KiB
C
4 years ago
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/*
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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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 polar_encoder.h
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* \brief Declaration of the polar encoder.
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* \author Jesus Gomez (CTTC)
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* \date 2020
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*
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* \copyright Software Radio Systems Limited
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*
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* 5G uses a polar encoder with maximum sizes \f$2^n\f$ with \f$n = 5,...,10\f$.
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*
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*/
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#ifndef SRSLTE_POLAR_ENCODER_H
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#define SRSLTE_POLAR_ENCODER_H
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#include "srslte/config.h"
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#include <stdint.h>
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/*!
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* Lists the different types of polar decoder.
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*/
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typedef enum SRSLTE_API {
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SRSLTE_POLAR_ENCODER_PIPELINED = 0, /*!< \brief Non-optimized version of the pipelined polar encoder*/
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SRSLTE_POLAR_ENCODER_AVX2 = 1, /*!< \brief SIMD implementation of the polar encoder */
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} srslte_polar_encoder_type_t;
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/*!
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* \brief Describes a polar encoder.
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*/
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typedef struct srslte_polar_encoder_t {
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void* ptr; /*!< \brief Pointer to the actual polar encoder structure. */
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int (*encode)(void* ptr,
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const uint8_t* input,
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uint8_t* output,
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const uint8_t code_size_log); /*!< \brief Pointer to the encoder function. */
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void (*free)(void*); /*!< \brief Pointer to a "destructor". */
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} srslte_polar_encoder_t;
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/*!
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* Initializes all the polar encoder variables according to the given code size.
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* \param[out] q A pointer to the initialized polar encoder.
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* \param[in] polar_encoder_type Polar encoder type.
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* \param[in] code_size_log The \f$ log_2\f$ of the number of bits of the encoder input/output vector.
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSLTE_API int srslte_polar_encoder_init(srslte_polar_encoder_t* q,
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srslte_polar_encoder_type_t polar_encoder_type,
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uint8_t code_size_log);
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/*!
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* The polar encoder "destructor": it frees all the resources.
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* \param[in, out] q A pointer to the dismantled encoder.
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*/
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SRSLTE_API void srslte_polar_encoder_free(srslte_polar_encoder_t* q);
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/*!
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* Encodes the input vector into a codeword with the specified polar encoder.
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* \param[in] q A pointer to the desired polar encoder.
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* \param[in] input The encoder input vector.
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* \param[in] code_size_log The \f$ log_2\f$ of the number of bits of the encoder input/output vector.
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* It cannot be larger than the maximum code_size_log specified in q.code_size_log of
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* the srslte_polar_encoder_t structure.
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* \param[out] output The encoder output vector.
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSLTE_API int
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srslte_polar_encoder_encode(srslte_polar_encoder_t* q, const uint8_t* input, uint8_t* output, uint8_t code_size_log);
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#endif // SRSLTE_POLAR_ENCODER_H
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