/* -*- c++ -*- */
/*
 * Copyright 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 "nlog10_ff_impl.h"
#include <gnuradio/io_signature.h>
#include <volk/volk.h>

namespace gr {
  namespace blocks {

    nlog10_ff::sptr nlog10_ff::make(float n, size_t vlen, float k)
    {
      return gnuradio::get_initial_sptr(new nlog10_ff_impl(n, vlen, k));
    }

    nlog10_ff_impl::nlog10_ff_impl(float n, size_t vlen, float k)
      : sync_block("nlog10_ff",
		      io_signature::make (1, 1, sizeof(float)*vlen),
		      io_signature::make (1, 1, sizeof(float)*vlen)),
        d_vlen(vlen)
    {
      setk(k);
      setn(n);
      //TODO message handlers
    }

    void
    nlog10_ff_impl::setk(float k)
    {
      d_k = k;
    }

    void
    nlog10_ff_impl::setn(float n)
    {
      d_prefactor = n / log2f(10.0f);
    }

    int
    nlog10_ff_impl::work(int noutput_items,
			      gr_vector_const_void_star &input_items,
			      gr_vector_void_star &output_items)
    {
      const float *in = (const float *) input_items[0];
      float *out = (float *) output_items[0];
      int noi = noutput_items * d_vlen;

      volk_32f_log2_32f(out, in, noi);
      volk_32f_s32f_multiply_32f(out, out, d_prefactor, noi);
      if(d_k != 0.0f) {
        for(int i = 0; i < noi; ++i) {
          out[i] += d_k;
        }
      }
      return noutput_items;
    }

  } /* namespace blocks */
}/* namespace gr */