/* -*- 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 "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::make_block_sptr<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 */
