/* -*- 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 "constellation_metrics_cf_impl.h" #include <gr_io_signature.h> #include <assert.h> #include <stdexcept> #include <iostream> namespace gr { namespace trellis { constellation_metrics_cf::sptr constellation_metrics_cf::make(digital::constellation_sptr constellation, digital::trellis_metric_type_t TYPE) { return gnuradio::get_initial_sptr (new constellation_metrics_cf_impl(constellation, TYPE)); } constellation_metrics_cf_impl::constellation_metrics_cf_impl(digital::constellation_sptr constellation, digital::trellis_metric_type_t TYPE) : gr_block("constellation_metrics_cf", gr_make_io_signature(1, -1, sizeof(gr_complex)), gr_make_io_signature(1, -1, sizeof(float))), d_constellation(constellation), d_TYPE(TYPE), d_O(constellation->arity()), d_D(constellation->dimensionality()) { set_relative_rate(1.0 * d_O / ((double) d_D)); set_output_multiple((int)d_O); } constellation_metrics_cf_impl::~constellation_metrics_cf_impl() { } void constellation_metrics_cf_impl::forecast(int noutput_items, gr_vector_int &ninput_items_required) { assert(noutput_items % d_O == 0); unsigned int input_required = d_D * noutput_items / d_O; unsigned int ninputs = ninput_items_required.size(); for(unsigned int i = 0; i < ninputs; i++) ninput_items_required[i] = input_required; } int constellation_metrics_cf_impl::general_work(int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) { unsigned int nstreams = input_items.size(); for(unsigned int m=0;m<nstreams;m++) { const gr_complex *in = (gr_complex*)input_items[m]; float *out = (float*)output_items[m]; for(unsigned int i = 0; i < noutput_items / d_O ; i++) { d_constellation->calc_metric(&(in[i*d_D]), &(out[i*d_O]), d_TYPE); } } consume_each(d_D * noutput_items / d_O); return noutput_items; } } /* namespace trellis */ } /* namespace gr */