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/* -*- c++ -*- */
/*
* Copyright 2004,2010,2012 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 "siso_combined_f_impl.h"
#include <gr_io_signature.h>
#include <stdexcept>
#include <assert.h>
#include <iostream>
namespace gr {
namespace trellis {
static const float INF = 1.0e9;
siso_combined_f::sptr
siso_combined_f::make(const fsm &FSM, int K,
int S0, int SK,
bool POSTI, bool POSTO,
siso_type_t SISO_TYPE,
int D, const std::vector<float> &TABLE,
digital::trellis_metric_type_t TYPE)
{
return gnuradio::get_initial_sptr
(new siso_combined_f_impl(FSM, K, S0, SK, POSTI, POSTO,
SISO_TYPE, D, TABLE, TYPE));
}
siso_combined_f_impl::siso_combined_f_impl(const fsm &FSM, int K,
int S0, int SK,
bool POSTI, bool POSTO,
siso_type_t SISO_TYPE,
int D, const std::vector<float> &TABLE,
digital::trellis_metric_type_t TYPE)
: gr_block("siso_combined_f",
gr_make_io_signature(1, -1, sizeof(float)),
gr_make_io_signature(1, -1, sizeof(float))),
d_FSM(FSM), d_K(K), d_S0(S0), d_SK(SK),
d_POSTI(POSTI), d_POSTO(POSTO),
d_SISO_TYPE(SISO_TYPE),
d_D(D), d_TABLE(TABLE), d_TYPE(TYPE)//,
//d_alpha(FSM.S()*(K+1)),
//d_beta(FSM.S()*(K+1))
{
int multiple;
if(d_POSTI && d_POSTO)
multiple = d_FSM.I()+d_FSM.O();
else if(d_POSTI)
multiple = d_FSM.I();
else if(d_POSTO)
multiple = d_FSM.O();
else
throw std::runtime_error ("Not both POSTI and POSTO can be false.");
//printf("constructor: Multiple = %d\n",multiple);
set_output_multiple(d_K*multiple);
//what is the meaning of relative rate for a block with 2 inputs?
//set_relative_rate ( multiple / ((double) d_FSM.I()) );
// it turns out that the above gives problems in the scheduler, so
// let's try (assumption O>I)
//set_relative_rate ( multiple / ((double) d_FSM.O()) );
// I am tempted to automate like this
if(d_FSM.I() <= d_D)
set_relative_rate(multiple / ((double)d_D));
else
set_relative_rate(multiple / ((double)d_FSM.I()));
}
siso_combined_f_impl::~siso_combined_f_impl()
{
}
void
siso_combined_f_impl::forecast(int noutput_items,
gr_vector_int &ninput_items_required)
{
int multiple;
if(d_POSTI && d_POSTO)
multiple = d_FSM.I()+d_FSM.O();
else if(d_POSTI)
multiple = d_FSM.I();
else if(d_POSTO)
multiple = d_FSM.O();
else
throw std::runtime_error ("Not both POSTI and POSTO can be false.");
//printf("forecast: Multiple = %d\n",multiple);
int input_required1 = d_FSM.I() * (noutput_items/multiple) ;
int input_required2 = d_D * (noutput_items/multiple) ;
//printf("forecast: Output requirements: %d\n",noutput_items);
//printf("forecast: Input requirements: %d %d\n",input_required1,input_required2);
unsigned ninputs = ninput_items_required.size();
for(unsigned int i = 0; i < ninputs/2; i++) {
ninput_items_required[2*i] = input_required1;
ninput_items_required[2*i+1] = input_required2;
}
}
int
siso_combined_f_impl::general_work(int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
int nstreams = output_items.size();
//printf("general_work:Streams: %d\n",nstreams);
int multiple;
if(d_POSTI && d_POSTO)
multiple = d_FSM.I()+d_FSM.O();
else if(d_POSTI)
multiple = d_FSM.I();
else if(d_POSTO)
multiple = d_FSM.O();
else
throw std::runtime_error("siso_combined_f_impl:: Not both POSTI and POSTO can be false.");
int nblocks = noutput_items / (d_K*multiple);
//printf("general_work:Blocks: %d\n",nblocks);
//for(int i=0;i<ninput_items.size();i++)
//printf("general_work:Input items available: %d\n",ninput_items[i]);
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;
for(int m=0;m<nstreams;m++) {
const float *in1 = (const float*)input_items[2*m];
const float *in2 = (const float*)input_items[2*m+1];
float *out = (float *) output_items[m];
for(int n=0;n<nblocks;n++) {
siso_algorithm_combined(d_FSM.I(),d_FSM.S(),d_FSM.O(),
d_FSM.NS(),d_FSM.OS(),d_FSM.PS(),d_FSM.PI(),
d_K,d_S0,d_SK,
d_POSTI,d_POSTO,
p2min,
d_D,d_TABLE,d_TYPE,
&(in1[n*d_K*d_FSM.I()]),&(in2[n*d_K*d_D]),
&(out[n*d_K*multiple])//,
//d_alpha,d_beta
);
}
}
for(unsigned int i = 0; i < input_items.size()/2; i++) {
consume(2*i,d_FSM.I() * noutput_items / multiple );
consume(2*i+1,d_D * noutput_items / multiple );
}
return noutput_items;
}
} /* namespace trellis */
} /* namespace gr */
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