ldpc_decoder.h

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/* -*- c++ -*- */
/*
 * Copyright 2015 Free Software Foundation, Inc.
 *
 * This file is part of GNU Radio
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 */
 
#ifndef INCLUDED_LDPC_DECODER_H
#define INCLUDED_LDPC_DECODER_H
 
typedef float INPUT_DATATYPE;
typedef unsigned char OUTPUT_DATATYPE;
 
#include <gnuradio/fec/decoder.h>
#include <map>
#include <string>
#include <vector>
 
#include <gnuradio/fec/alist.h>
#include <gnuradio/fec/awgn_bp.h>
#include <gnuradio/fec/cldpc.h>
 
namespace gr {
namespace fec {
 
 
#define MAXLOG 1e7
 
class FEC_API ldpc_decoder : public generic_decoder
{
private:
    // private constructor
    ldpc_decoder(std::string alist_file, float sigma, int max_iterations);
 
    // plug into the generic fec api
    int get_history() override;
    float get_shift() override;
    const char* get_conversion();
    void generic_work(void* inBuffer, void* outbuffer) override;
    float d_iterations;
    int d_input_size, d_output_size;
    double d_rate;
 
    alist d_list;
    cldpc d_code;
    awgn_bp d_spa;
 
public:
    ~ldpc_decoder() override;
 
    double rate() override;
    bool set_frame_size(unsigned int frame_size) override;
 
    static generic_decoder::sptr
    make(std::string alist_file, float sigma = 0.5, int max_iterations = 50);
 
    int get_output_size() override;
    int get_input_size() override;
    int get_input_item_size() override;
    int get_output_item_size() override;
    float get_iterations() override { return d_iterations; }
};
 
} // namespace fec
} // namespace gr
 
#endif /* INCLUDED_LDPC_DECODER_H */