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112 lines
4.4 KiB
C
112 lines
4.4 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 ldpc_encoder.h
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* \brief Declaration of the LDPC encoder.
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* \author David Gregoratti and Jesus Gomez
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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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*/
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#ifndef SRSRAN_LDPCENCODER_H
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#define SRSRAN_LDPCENCODER_H
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#include "srsran/phy/fec/ldpc/base_graph.h"
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/*!
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* \brief Types of LDPC encoder.
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*/
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typedef enum SRSRAN_API {
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SRSRAN_LDPC_ENCODER_C = 0, /*!< \brief Non-optimized encoder. */
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#if LV_HAVE_AVX2
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SRSRAN_LDPC_ENCODER_AVX2, /*!< \brief SIMD-optimized encoder. */
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#endif // LV_HAVE_AVX2
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#if LV_HAVE_AVX512
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SRSRAN_LDPC_ENCODER_AVX512, /*!< \brief SIMD-optimized encoder. */
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#endif // LV_HAVE_AVX512
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} srsran_ldpc_encoder_type_t;
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/*!
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* \brief Describes an LDPC encoder.
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*/
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typedef struct SRSRAN_API {
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void* ptr; /*!< \brief %Encoder auxiliary registers. */
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srsran_basegraph_t bg; /*!< \brief Current base graph. */
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uint16_t ls; /*!< \brief Current lifting size. */
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uint8_t bgN; /*!< \brief Number of variable nodes in the BG. */
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uint16_t liftN; /*!< \brief Number of variable nodes in the lifted graph. */
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uint8_t bgM; /*!< \brief Number of check nodes in the BG. */
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uint16_t liftM; /*!< \brief Number of check nodes in the lifted graph. */
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uint8_t bgK; /*!< \brief Number of "uncoded bits" in the BG. */
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uint16_t liftK; /*!< \brief Number of uncoded bits in the lifted graph. */
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uint16_t* pcm; /*!< \brief Pointer to the parity check matrix (compact form). */
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void (*free)(void*); /*!< \brief Pointer to a "destructor". */
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/*! \brief Pointer to the encoder function. */
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int (*encode)(void*, const uint8_t*, uint8_t*, uint32_t, uint32_t);
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/*! \brief Pointer to the encoder for the high-rate region. */
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void (*encode_high_rate)(void*, uint8_t*);
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/*! \brief Pointer to the encoder for the high-rate region (SIMD-optimized version). */
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void (*encode_high_rate_avx2)(void*);
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/*! \brief Pointer to the encoder for the high-rate region (SIMD-AVX512-optimized version). */
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void (*encode_high_rate_avx512)(void*);
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} srsran_ldpc_encoder_t;
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/*!
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* Initializes all the LDPC encoder variables according to the given base graph
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* and lifting size.
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* \param[out] q A pointer to a srsran_ldpc_encoder_t structure.
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* \param[in] type The encoder type.
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* \param[in] bg The desired base graph (BG1 or BG2).
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* \param[in] ls The desired lifting size.
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSRAN_API int
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srsran_ldpc_encoder_init(srsran_ldpc_encoder_t* q, srsran_ldpc_encoder_type_t type, srsran_basegraph_t bg, uint16_t ls);
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/*!
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* The LDPC encoder "destructor": it frees all the resources allocated to the encoder.
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* \param[in] q A pointer to the dismantled encoder.
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*/
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SRSRAN_API void srsran_ldpc_encoder_free(srsran_ldpc_encoder_t* q);
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/*!
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* Encodes a message into a codeword with the specified encoder.
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* \param[in] q A pointer to the desired encoder.
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* \param[in] input The message to encode.
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* \param[out] output The resulting codeword.
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* \param[in] input_length The number of uncoded bits in the input message.
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSRAN_API int
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srsran_ldpc_encoder_encode(srsran_ldpc_encoder_t* q, const uint8_t* input, uint8_t* output, uint32_t input_length);
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/*!
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* Encodes a message into a codeword with the specified encoder.
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* \param[in] q A pointer to the desired encoder.
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* \param[in] input The message to encode.
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* \param[out] output The resulting codeword.
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* \param[in] input_length The number of uncoded bits in the input message.
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* \param[in] cdwd_rm_length The codeword length after rate matching.
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSRAN_API int srsran_ldpc_encoder_encode_rm(srsran_ldpc_encoder_t* q,
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const uint8_t* input,
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uint8_t* output,
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uint32_t input_length,
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uint32_t cdwd_rm_length);
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#endif // SRSRAN_LDPCENCODER_H
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