divide_impl.cc

/* -*- c++ -*- */
/*
 * Copyright 2004,2009,2010,2012,2018 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 "divide_impl.h"
#include <gnuradio/io_signature.h>
#include <volk/volk.h>

namespace gr {
  namespace blocks {

    template <class T>
    typename divide<T>::sptr divide<T>::make(size_t vlen)
    {
      return gnuradio::get_initial_sptr(new divide_impl<T> (vlen));
    }

    template <>
    divide_impl<float>::divide_impl(size_t vlen)
      : sync_block ("divide",
                    io_signature::make (2, -1, sizeof (float)*vlen),
                    io_signature::make (1,  1, sizeof (float)*vlen)),
        d_vlen(vlen)
    {
    }

    template <>
    int
    divide_impl<float>::work(int noutput_items,
                         gr_vector_const_void_star &input_items,
                         gr_vector_void_star &output_items)
    {
      float *optr = (float *) output_items[0];
      size_t ninputs = input_items.size ();
      float *numerator = (float *) input_items[0];
      for(size_t inp = 1; inp < ninputs; ++inp)
        {
          volk_32f_x2_divide_32f(optr, numerator, (float*) input_items[inp], noutput_items * d_vlen);
          numerator = optr;
        }

      return noutput_items;
    }

    template <>
    divide_impl<gr_complex>::divide_impl(size_t vlen)
      : sync_block ("divide_cc",
                    io_signature::make (2, -1, sizeof (gr_complex)*vlen),
                    io_signature::make (1,  1, sizeof (gr_complex)*vlen)),
        d_vlen(vlen)
    {
    }

    template <>
    int
    divide_impl<gr_complex>::work(int noutput_items,
                         gr_vector_const_void_star &input_items,
                         gr_vector_void_star &output_items)
    {
      gr_complex *optr = (gr_complex *) output_items[0];
      size_t ninputs = input_items.size ();
      gr_complex *numerator = (gr_complex *) input_items[0];
      for(size_t inp = 1; inp < ninputs; ++inp)
        {
          volk_32fc_x2_divide_32fc(optr, numerator, (gr_complex*) input_items[inp], noutput_items * d_vlen);
          numerator = optr;
        }

      return noutput_items;
    }

    template <class T>
    divide_impl<T> ::divide_impl (size_t vlen)
      : sync_block ("divide",
		       io_signature::make (1, -1, sizeof (T)*vlen),
		       io_signature::make (1,  1, sizeof (T)*vlen)),
      d_vlen(vlen)
    {
    }

    template <class T>
    int
    divide_impl<T> ::work(int noutput_items,
		      gr_vector_const_void_star &input_items,
		      gr_vector_void_star &output_items)
    {
      T *optr = (T *) output_items[0];

      int ninputs = input_items.size ();

      for (size_t i = 0; i < noutput_items*d_vlen; i++){
	T acc = ((T *) input_items[0])[i];
	for (int j = 1; j < ninputs; j++)
	  acc /= ((T *) input_items[j])[i];

	*optr++ = (T) acc;
      }

      return noutput_items;
    }

template class divide<std::int16_t>;
template class divide<std::int32_t>;
    template class divide<float>;
    template class divide<gr_complex>;
  } /* namespace blocks */
} /* namespace gr */