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/* -*- c++ -*- */
/*
* Copyright 2004 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 2, 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.
*/
#ifndef INCLUDED_TRELLIS_SISO_F_H
#define INCLUDED_TRELLIS_SISO_F_H
#include "fsm.h"
#include "trellis_siso_type.h"
#include <gr_block.h>
class trellis_siso_f;
typedef boost::shared_ptr<trellis_siso_f> trellis_siso_f_sptr;
trellis_siso_f_sptr trellis_make_siso_f (
const fsm &FSM, // underlying FSM
int K, // block size in trellis steps
int S0, // initial state (put -1 if not specified)
int SK, // final state (put -1 if not specified)
bool POSTI, // true if you want a-posteriori info about the input symbols to be mux-ed in the output
bool POSTO, // true if you want a-posteriori info about the output symbols to be mux-ed in the output
trellis_siso_type_t d_SISO_TYPE // perform "min-sum" or "sum-product" combining
);
class trellis_siso_f : public gr_block
{
fsm d_FSM;
int d_K;
int d_S0;
int d_SK;
bool d_POSTI;
bool d_POSTO;
trellis_siso_type_t d_SISO_TYPE;
//std::vector<float> d_alpha;
//std::vector<float> d_beta;
friend trellis_siso_f_sptr trellis_make_siso_f (
const fsm &FSM,
int K,
int S0,
int SK,
bool POSTI,
bool POSTO,
trellis_siso_type_t d_SISO_TYPE);
trellis_siso_f (
const fsm &FSM,
int K,
int S0,
int SK,
bool POSTI,
bool POSTO,
trellis_siso_type_t d_SISO_TYPE);
public:
fsm FSM () const { return d_FSM; }
int K () const { return d_K; }
int S0 () const { return d_S0; }
int SK () const { return d_SK; }
bool POSTI () const { return d_POSTI; }
bool POSTO () const { return d_POSTO; }
trellis_siso_type_t SISO_TYPE () const { return d_SISO_TYPE; }
void forecast (int noutput_items,
gr_vector_int &ninput_items_required);
int general_work (int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif
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