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/* -*- c++ -*- */
/*
* Copyright 2004,2010,2012,2018 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 "noise_source_impl.h"
#include <gnuradio/io_signature.h>
#include <stdexcept>
namespace gr {
namespace analog {
template <class T>
typename noise_source<T>::sptr noise_source<T>::make(noise_type_t type, float ampl, long seed) {
return gnuradio::get_initial_sptr(new noise_source_impl<T>(type, ampl, seed));
}
template <class T>
noise_source_impl<T>::noise_source_impl(noise_type_t type, float ampl, long seed)
: sync_block("noise_source", io_signature::make(0, 0, 0), io_signature::make(1, 1, sizeof(T))),
d_type(type), d_ampl(ampl), d_rng(seed) {}
template <>
noise_source_impl<gr_complex>::noise_source_impl(noise_type_t type, float ampl, long seed)
: sync_block("noise_source",
io_signature::make(0, 0, 0),
io_signature::make(1, 1, sizeof(gr_complex))),
d_type(type), d_ampl(ampl / sqrtf(2.0f)), d_rng(seed) {}
template <class T>
noise_source_impl<T>::~noise_source_impl<T>() {}
template <class T>
void noise_source_impl<T>::set_type(noise_type_t type) {
gr::thread::scoped_lock l(this->d_setlock);
d_type = type;
}
template <class T>
void noise_source_impl<T>::set_amplitude(float ampl) {
gr::thread::scoped_lock l(this->d_setlock);
d_ampl = ampl;
}
template <>
void noise_source_impl<gr_complex>::set_amplitude(float ampl) {
gr::thread::scoped_lock l(this->d_setlock);
d_ampl = ampl / sqrtf(2.0f);
}
template <class T>
int noise_source_impl<T>::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items) {
gr::thread::scoped_lock l(this->d_setlock);
T* out = (T*)output_items[0];
switch (d_type) {
case GR_UNIFORM:
for (int i = 0; i < noutput_items; i++) {
out[i] = (T)(d_ampl * ((d_rng.ran1() * 2.0) - 1.0));
}
break;
case GR_GAUSSIAN:
for (int i = 0; i < noutput_items; i++) {
out[i] = (T)(d_ampl * d_rng.gasdev());
}
break;
case GR_LAPLACIAN:
for (int i = 0; i < noutput_items; i++) {
out[i] = (T)(d_ampl * d_rng.laplacian());
}
break;
case GR_IMPULSE: // FIXME changeable impulse settings
for (int i = 0; i < noutput_items; i++) {
out[i] = (T)(d_ampl * d_rng.impulse(9));
}
break;
default:
throw std::runtime_error("invalid type");
}
return noutput_items;
}
template <>
int noise_source_impl<gr_complex>::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items) {
gr::thread::scoped_lock l(this->d_setlock);
gr_complex* out = (gr_complex*)output_items[0];
switch (d_type) {
case GR_UNIFORM:
for (int i = 0; i < noutput_items; i++) {
out[i] = gr_complex(d_ampl * ((d_rng.ran1() * 2.0) - 1.0),
d_ampl * ((d_rng.ran1() * 2.0) - 1.0));
}
break;
case GR_GAUSSIAN:
for (int i = 0; i < noutput_items; i++) {
out[i] = d_ampl * d_rng.rayleigh_complex();
}
break;
default:
throw std::runtime_error("invalid type");
}
return noutput_items;
}
template class noise_source<std::int16_t>;
template class noise_source<std::int32_t>;
template class noise_source<float>;
template class noise_source<gr_complex>;
} /* namespace analog */
} /* namespace gr */
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