mirror of https://github.com/PentHertz/srsLTE.git
139 lines
4.6 KiB
C
139 lines
4.6 KiB
C
/*
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* Copyright 2013-2019 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: turbodecoder.h
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*
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* Description: Turbo Decoder.
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* Parallel Concatenated Convolutional Code (PCCC) with two 8-state constituent
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* encoders and one turbo code internal interleaver. The coding rate of turbo
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* encoder is 1/3.
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* MAP_GEN is the MAX-LOG-MAP generic implementation of the decoder.
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*
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* Reference: 3GPP TS 36.212 version 10.0.0 Release 10 Sec. 5.1.3.2
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*********************************************************************************************/
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#ifndef SRSLTE_TURBODECODER_H
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#define SRSLTE_TURBODECODER_H
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#include "srslte/config.h"
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#include "srslte/phy/fec/tc_interl.h"
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#include "srslte/phy/fec/cbsegm.h"
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#define SRSLTE_TCOD_RATE 3
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#define SRSLTE_TCOD_TOTALTAIL 12
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#define SRSLTE_TCOD_MAX_LEN_CB 6144
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// Expect the input to be aligned for sub-block window processing.
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#define SRSLTE_TDEC_EXPECT_INPUT_SB 1
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// Include interfaces for 8 and 16 bit decoder implementations
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#define LLR_IS_8BIT
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#include "srslte/phy/fec/turbodecoder_impl.h"
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#undef LLR_IS_8BIT
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#define LLR_IS_16BIT
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#include "srslte/phy/fec/turbodecoder_impl.h"
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#undef LLR_IS_16BIT
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#define SRSLTE_TDEC_NOF_AUTO_MODES_8 2
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#define SRSLTE_TDEC_NOF_AUTO_MODES_16 3
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typedef enum {SRSLTE_TDEC_8, SRSLTE_TDEC_16} srslte_tdec_llr_type_t;
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typedef struct SRSLTE_API {
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uint32_t max_long_cb;
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void *dec8_hdlr[SRSLTE_TDEC_NOF_AUTO_MODES_8];
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void *dec16_hdlr[SRSLTE_TDEC_NOF_AUTO_MODES_16];
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srslte_tdec_8bit_impl_t *dec8[SRSLTE_TDEC_NOF_AUTO_MODES_8];
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srslte_tdec_16bit_impl_t *dec16[SRSLTE_TDEC_NOF_AUTO_MODES_16];
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int nof_blocks8[SRSLTE_TDEC_NOF_AUTO_MODES_8];
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int nof_blocks16[SRSLTE_TDEC_NOF_AUTO_MODES_16];
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// Declare as void types as can be int8 or int16
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void *app1;
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void *app2;
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void *ext1;
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void *ext2;
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void *syst0;
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void *parity0;
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void *parity1;
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void *input_conv;
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bool force_not_sb;
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srslte_tdec_impl_type_t dec_type;
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srslte_tdec_llr_type_t current_llr_type;
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uint32_t current_dec;
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uint32_t current_long_cb;
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uint32_t current_inter_idx;
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int current_cbidx;
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srslte_tc_interl_t interleaver[4][SRSLTE_NOF_TC_CB_SIZES];
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int n_iter;
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} srslte_tdec_t;
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SRSLTE_API int srslte_tdec_init(srslte_tdec_t * h,
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uint32_t max_long_cb);
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SRSLTE_API int srslte_tdec_init_manual(srslte_tdec_t * h,
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uint32_t max_long_cb,
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srslte_tdec_impl_type_t dec_type);
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SRSLTE_API void srslte_tdec_free(srslte_tdec_t * h);
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SRSLTE_API void srslte_tdec_force_not_sb(srslte_tdec_t *h);
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SRSLTE_API int srslte_tdec_new_cb(srslte_tdec_t * h,
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uint32_t long_cb);
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SRSLTE_API int srslte_tdec_get_nof_iterations(srslte_tdec_t * h);
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SRSLTE_API uint32_t srslte_tdec_autoimp_get_subblocks(uint32_t long_cb);
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SRSLTE_API uint32_t srslte_tdec_autoimp_get_subblocks_8bit(uint32_t long_cb);
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SRSLTE_API void srslte_tdec_iteration(srslte_tdec_t * h,
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int16_t* input,
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uint8_t *output);
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SRSLTE_API int srslte_tdec_run_all(srslte_tdec_t * h,
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int16_t * input,
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uint8_t *output,
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uint32_t nof_iterations,
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uint32_t long_cb);
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SRSLTE_API void srslte_tdec_iteration_8bit(srslte_tdec_t * h,
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int8_t* input,
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uint8_t *output);
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SRSLTE_API int srslte_tdec_run_all_8bit(srslte_tdec_t * h,
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int8_t * input,
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uint8_t *output,
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uint32_t nof_iterations,
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uint32_t long_cb);
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#endif // SRSLTE_TURBODECODER_H
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