pccc_decoder_blk_impl.cc

/* -*- c++ -*- */
/*
 * Copyright 2004,2010,2012,2018 Free Software Foundation, Inc.
 *
 * This file is part of GNU Radio
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 */


#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "pccc_decoder_blk_impl.h"
#include <gnuradio/io_signature.h>
#include <gnuradio/trellis/core_algorithms.h>

namespace gr {
namespace trellis {

template <class T>
typename pccc_decoder_blk<T>::sptr
pccc_decoder_blk<T>::make(const fsm& FSM1,
                          int ST10,
                          int ST1K,
                          const fsm& FSM2,
                          int ST20,
                          int ST2K,
                          const interleaver& INTERLEAVER,
                          int blocklength,
                          int repetitions,
                          siso_type_t SISO_TYPE)
{
    return gnuradio::make_block_sptr<pccc_decoder_blk_impl<T>>(FSM1,
                                                               ST10,
                                                               ST1K,
                                                               FSM2,
                                                               ST20,
                                                               ST2K,
                                                               INTERLEAVER,
                                                               blocklength,
                                                               repetitions,
                                                               SISO_TYPE);
}

template <class T>
pccc_decoder_blk_impl<T>::pccc_decoder_blk_impl(const fsm& FSM1,
                                                int ST10,
                                                int ST1K,
                                                const fsm& FSM2,
                                                int ST20,
                                                int ST2K,
                                                const interleaver& INTERLEAVER,
                                                int blocklength,
                                                int repetitions,
                                                siso_type_t SISO_TYPE)
    : block("pccc_decoder_blk",
            io_signature::make(1, 1, sizeof(float)),
            io_signature::make(1, 1, sizeof(T))),
      d_FSM1(FSM1),
      d_ST10(ST10),
      d_ST1K(ST1K),
      d_FSM2(FSM2),
      d_ST20(ST20),
      d_ST2K(ST2K),
      d_INTERLEAVER(INTERLEAVER),
      d_blocklength(blocklength),
      d_repetitions(repetitions),
      d_SISO_TYPE(SISO_TYPE)
{
    this->set_relative_rate(1, (uint64_t)(d_FSM1.O() * d_FSM2.O()));
    this->set_output_multiple(d_blocklength);
}

template <class T>
pccc_decoder_blk_impl<T>::~pccc_decoder_blk_impl()
{
}

template <class T>
void pccc_decoder_blk_impl<T>::forecast(int noutput_items,
                                        gr_vector_int& ninput_items_required)
{
    int input_required = d_FSM1.O() * d_FSM2.O() * noutput_items;
    ninput_items_required[0] = input_required;
}

//===========================================================

template <class T>
int pccc_decoder_blk_impl<T>::general_work(int noutput_items,
                                           gr_vector_int& ninput_items,
                                           gr_vector_const_void_star& input_items,
                                           gr_vector_void_star& output_items)
{
    int nblocks = noutput_items / d_blocklength;

    float (*p2min)(float, float) = NULL;
    if (d_SISO_TYPE == TRELLIS_MIN_SUM)
        p2min = &min;
    else if (d_SISO_TYPE == TRELLIS_SUM_PRODUCT)
        p2min = &min_star;

    const float* in = (const float*)input_items[0];
    T* out = (T*)output_items[0];
    for (int n = 0; n < nblocks; n++) {
        pccc_decoder(d_FSM1,
                     d_ST10,
                     d_ST1K,
                     d_FSM2,
                     d_ST20,
                     d_ST2K,
                     d_INTERLEAVER,
                     d_blocklength,
                     d_repetitions,
                     p2min,
                     &(in[n * d_blocklength * d_FSM1.O() * d_FSM2.O()]),
                     &(out[n * d_blocklength]));
    }

    this->consume_each(d_FSM1.O() * d_FSM2.O() * noutput_items);
    return noutput_items;
}

template class pccc_decoder_blk<std::uint8_t>;
template class pccc_decoder_blk<std::int16_t>;
template class pccc_decoder_blk<std::int32_t>;
} /* namespace trellis */
} /* namespace gr */