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/* -*- 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 <gr_io_signature.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)
: gr_sync_block("nlog10_ff",
gr_make_io_signature (1, 1, sizeof(float)*vlen),
gr_make_io_signature (1, 1, sizeof(float)*vlen)),
d_n(n), d_vlen(vlen), d_k(k)
{
}
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;
float n = d_n;
float k = d_k;
for (int i = 0; i < noi; i++)
out[i] = n * log10(std::max(in[i], (float) 1e-18)) + k;
return noutput_items;
}
} /* namespace blocks */
}/* namespace gr */
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