/* -*- c++ -*- */
/*
 * Copyright 2004,2010,2012,2018 Free Software Foundation, Inc.
 *
 * This file is part of GNU Radio
 *
 * GNU Radio is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3, or (at your option)
 * any later version.
 *
 * GNU Radio is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU Radio; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */


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

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

namespace gr {
namespace trellis {

template <class T>
typename sccc_decoder_blk<T>::sptr
sccc_decoder_blk<T>::make(const fsm& FSMo,
                          int STo0,
                          int SToK,
                          const fsm& FSMi,
                          int STi0,
                          int STiK,
                          const interleaver& INTERLEAVER,
                          int blocklength,
                          int repetitions,
                          siso_type_t SISO_TYPE)
{
    return gnuradio::get_initial_sptr(new sccc_decoder_blk_impl<T>(FSMo,
                                                                   STo0,
                                                                   SToK,
                                                                   FSMi,
                                                                   STi0,
                                                                   STiK,
                                                                   INTERLEAVER,
                                                                   blocklength,
                                                                   repetitions,
                                                                   SISO_TYPE));
}

template <class T>
sccc_decoder_blk_impl<T>::sccc_decoder_blk_impl(const fsm& FSMo,
                                                int STo0,
                                                int SToK,
                                                const fsm& FSMi,
                                                int STi0,
                                                int STiK,
                                                const interleaver& INTERLEAVER,
                                                int blocklength,
                                                int repetitions,
                                                siso_type_t SISO_TYPE)
    : block("sccc_decoder_blk",
            io_signature::make(1, 1, sizeof(float)),
            io_signature::make(1, 1, sizeof(T))),
      d_FSMo(FSMo),
      d_STo0(STo0),
      d_SToK(SToK),
      d_FSMi(FSMi),
      d_STi0(STi0),
      d_STiK(STiK),
      d_INTERLEAVER(INTERLEAVER),
      d_blocklength(blocklength),
      d_repetitions(repetitions),
      d_SISO_TYPE(SISO_TYPE)
{
    this->set_relative_rate(1, (uint64_t)d_FSMi.O());
    this->set_output_multiple(d_blocklength);
}

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

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

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

template <class T>
int sccc_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++) {
        sccc_decoder(d_FSMo,
                     d_STo0,
                     d_SToK,
                     d_FSMi,
                     d_STi0,
                     d_STiK,
                     d_INTERLEAVER,
                     d_blocklength,
                     d_repetitions,
                     p2min,
                     &(in[n * d_blocklength * d_FSMi.O()]),
                     &(out[n * d_blocklength]));
    }

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

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