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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 <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 */
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