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/* -*- c++ -*- */
/*
* Copyright 2012-2013 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 "ctrlport_probe_psd_impl.h"
#include <gnuradio/io_signature.h>
namespace gr {
namespace fft {
ctrlport_probe_psd::sptr
ctrlport_probe_psd::make(const std::string& id, const std::string& desc, int len)
{
return gnuradio::get_initial_sptr(new ctrlport_probe_psd_impl(id, desc, len));
}
ctrlport_probe_psd_impl::ctrlport_probe_psd_impl(const std::string& id,
const std::string& desc,
int len)
: gr::sync_block("probe_psd",
gr::io_signature::make(1, 1, sizeof(gr_complex)),
gr::io_signature::make(0, 0, 0)),
d_id(id),
d_desc(desc),
d_len(len),
d_fft(len, true, 1)
{
set_length(len);
}
ctrlport_probe_psd_impl::~ctrlport_probe_psd_impl() {}
void ctrlport_probe_psd_impl::forecast(int noutput_items,
gr_vector_int& ninput_items_required)
{
// make sure all inputs have noutput_items available
unsigned ninputs = ninput_items_required.size();
for (unsigned i = 0; i < ninputs; i++)
ninput_items_required[i] = d_len;
}
// boost::shared_mutex mutex_buffer;
// mutable boost::mutex mutex_notify;
// boost::condition_variable condition_buffer_ready;
std::vector<gr_complex> ctrlport_probe_psd_impl::get()
{
mutex_buffer.lock();
d_buffer.clear();
mutex_buffer.unlock();
// wait for condition
boost::mutex::scoped_lock lock(mutex_notify);
condition_buffer_ready.wait(lock);
mutex_buffer.lock();
memcpy(d_fft.get_inbuf(), &d_buffer[0], d_len * sizeof(gr_complex));
d_fft.execute();
std::vector<gr_complex> buf_copy;
buf_copy.resize(d_len);
gr_complex* out = d_fft.get_outbuf();
for (size_t i = 0; i < d_len; i++) {
size_t idx = (i + d_len / 2) % d_len;
float x = i / (d_len - 1.0f) - 0.5;
buf_copy[i] = gr_complex(x, 10 * log10((out[idx] * std::conj(out[idx])).real()));
}
mutex_buffer.unlock();
return buf_copy;
}
void ctrlport_probe_psd_impl::set_length(int len)
{
if (len > 8191) {
std::cerr << "probe_psd: length " << len << " exceeds maximum buffer size of 8191"
<< std::endl;
len = 8191;
}
d_len = len;
d_buffer.reserve(d_len);
}
int ctrlport_probe_psd_impl::length() const { return (int)d_len; }
int ctrlport_probe_psd_impl::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
const gr_complex* in = (const gr_complex*)input_items[0];
// copy samples to get buffer if we need samples
mutex_buffer.lock();
if (d_buffer.size() < d_len) {
// copy smaller of remaining buffer space and num inputs to work()
int num_copy = std::min((int)(d_len - d_buffer.size()), noutput_items);
// TODO: convert this to a copy operator for speed...
for (int i = 0; i < num_copy; i++) {
d_buffer.push_back(in[i]);
}
// notify the waiting get() if we fill up the buffer
if (d_buffer.size() == d_len) {
condition_buffer_ready.notify_one();
}
}
mutex_buffer.unlock();
return noutput_items;
}
void ctrlport_probe_psd_impl::setup_rpc()
{
#ifdef GR_CTRLPORT
int len = static_cast<int>(d_len);
d_rpc_vars.push_back(rpcbasic_sptr(
new rpcbasic_register_get<ctrlport_probe_psd, std::vector<std::complex<float>>>(
alias(),
d_id.c_str(),
&ctrlport_probe_psd::get,
pmt::make_c32vector(0, -2),
pmt::make_c32vector(0, 2),
pmt::make_c32vector(0, 0),
"dB",
d_desc.c_str(),
RPC_PRIVLVL_MIN,
DISPXY | DISPOPTSCATTER)));
d_rpc_vars.push_back(rpcbasic_sptr(
new rpcbasic_register_get<ctrlport_probe_psd, int>(alias(),
"length",
&ctrlport_probe_psd::length,
pmt::mp(1),
pmt::mp(10 * len),
pmt::mp(len),
"samples",
"get vector length",
RPC_PRIVLVL_MIN,
DISPNULL)));
// d_rpc_vars.push_back(
// rpcbasic_sptr(new rpcbasic_register_set<ctrlport_probe_psd, int>(
// alias(), "length", &ctrlport_probe_psd::set_length,
// pmt::mp(1), pmt::mp(10*len), pmt::mp(len),
// "samples", "set vector length", RPC_PRIVLVL_MIN, DISPNULL)));
#endif /* GR_CTRLPORT */
}
} /* namespace fft */
} /* namespace gr */
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