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/* -*- 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 <iostream>
#include <gnuradio/trellis/core_algorithms.h>
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 */
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