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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 "freq_sink_c_impl.h"
#include <gr_io_signature.h>
#include <string.h>
#include <volk/volk.h>
namespace gr {
namespace qtgui {
freq_sink_c::sptr
freq_sink_c::make(int fftsize, int wintype,
double fc, double bw,
const std::string &name,
int nconnections,
QWidget *parent)
{
return gnuradio::get_initial_sptr
(new freq_sink_c_impl(fftsize, wintype,
fc, bw, name,
nconnections,
parent));
}
freq_sink_c_impl::freq_sink_c_impl(int fftsize, int wintype,
double fc, double bw,
const std::string &name,
int nconnections,
QWidget *parent)
: gr_sync_block("freq_sink_c",
gr_make_io_signature(1, -1, sizeof(gr_complex)),
gr_make_io_signature(0, 0, 0)),
d_fftsize(fftsize), d_fftavg(1.0),
d_wintype((filter::firdes::win_type)(wintype)),
d_center_freq(fc), d_bandwidth(bw), d_name(name),
d_nconnections(nconnections), d_parent(parent)
{
d_main_gui = NULL;
// Perform fftshift operation;
// this is usually desired when plotting
d_shift = true;
d_fft = new fft::fft_complex(d_fftsize, true);
d_fbuf = fft::malloc_float(d_fftsize);
memset(d_fbuf, 0, d_fftsize*sizeof(float));
d_index = 0;
for(int i = 0; i < d_nconnections; i++) {
d_residbufs.push_back(fft::malloc_complex(d_fftsize));
d_magbufs.push_back(fft::malloc_double(d_fftsize));
memset(d_residbufs[i], 0, d_fftsize*sizeof(gr_complex));
memset(d_magbufs[i], 0, d_fftsize*sizeof(double));
}
buildwindow();
initialize();
}
freq_sink_c_impl::~freq_sink_c_impl()
{
for(int i = 0; i < d_nconnections; i++) {
fft::free(d_residbufs[i]);
fft::free(d_magbufs[i]);
}
delete d_fft;
fft::free(d_fbuf);
}
void
freq_sink_c_impl::forecast(int noutput_items, gr_vector_int &ninput_items_required)
{
unsigned int ninputs = ninput_items_required.size();
for (unsigned int i = 0; i < ninputs; i++) {
ninput_items_required[i] = std::min(d_fftsize, 8191);
}
}
void
freq_sink_c_impl::initialize()
{
if(qApp != NULL) {
d_qApplication = qApp;
}
else {
int argc=0;
char **argv = NULL;
d_qApplication = new QApplication(argc, argv);
}
d_main_gui = new FreqDisplayForm(d_nconnections, d_parent);
d_main_gui->SetFFTSize(d_fftsize);
d_main_gui->SetFFTWindowType(d_wintype);
d_main_gui->SetFrequencyRange(d_center_freq,
d_center_freq - d_bandwidth/2.0,
d_center_freq + d_bandwidth/2.0);
// initialize update time to 10 times a second
set_update_time(0.1);
d_last_time = 0;
}
void
freq_sink_c_impl::exec_()
{
d_qApplication->exec();
}
QWidget*
freq_sink_c_impl::qwidget()
{
return d_main_gui;
}
PyObject*
freq_sink_c_impl::pyqwidget()
{
PyObject *w = PyLong_FromVoidPtr((void*)d_main_gui);
PyObject *retarg = Py_BuildValue("N", w);
return retarg;
}
void
freq_sink_c_impl::set_fft_size(const int fftsize)
{
d_fftsize = fftsize;
d_main_gui->SetFFTSize(fftsize);
}
int
freq_sink_c_impl::fft_size() const
{
return d_fftsize;
}
void
freq_sink_c_impl::set_fft_average(const float fftavg)
{
d_fftavg = fftavg;
d_main_gui->SetFFTAverage(fftavg);
}
float
freq_sink_c_impl::fft_average() const
{
return d_fftavg;
}
void
freq_sink_c_impl::set_frequency_range(const double centerfreq,
const double bandwidth)
{
d_center_freq = centerfreq;
d_bandwidth = bandwidth;
d_main_gui->SetFrequencyRange(d_center_freq,
-d_bandwidth/2.0,
d_bandwidth/2.0);
}
void
freq_sink_c_impl::set_fft_power_db(double min, double max)
{
d_main_gui->SetFrequencyAxis(min, max);
}
void
freq_sink_c_impl::set_update_time(double t)
{
//convert update time to ticks
gruel::high_res_timer_type tps = gruel::high_res_timer_tps();
d_update_time = t * tps;
d_main_gui->setUpdateTime(t);
}
void
freq_sink_c_impl::set_title(int which, const std::string &title)
{
d_main_gui->setTitle(which, title.c_str());
}
void
freq_sink_c_impl::set_color(int which, const std::string &color)
{
d_main_gui->setColor(which, color.c_str());
}
void
freq_sink_c_impl::set_line_width(int which, int width)
{
d_main_gui->setLineWidth(which, width);
}
void
freq_sink_c_impl::set_line_style(int which, Qt::PenStyle style)
{
d_main_gui->setLineStyle(which, style);
}
void
freq_sink_c_impl::set_line_marker(int which, QwtSymbol::Style marker)
{
d_main_gui->setLineMarker(which, marker);
}
void
freq_sink_c_impl::set_size(int width, int height)
{
d_main_gui->resize(QSize(width, height));
}
void
freq_sink_c_impl::fft(float *data_out, const gr_complex *data_in, int size)
{
if(d_window.size()) {
volk_32fc_32f_multiply_32fc_a(d_fft->get_inbuf(), data_in,
&d_window.front(), size);
}
else {
memcpy(d_fft->get_inbuf(), data_in, sizeof(gr_complex)*size);
}
d_fft->execute(); // compute the fft
volk_32fc_s32f_x2_power_spectral_density_32f_a(data_out, d_fft->get_outbuf(),
size, 1.0, size);
// Perform shift operation
unsigned int len = (unsigned int)(floor(size/2.0));
float *tmp = (float*)malloc(sizeof(float)*len);
memcpy(tmp, &data_out[0], sizeof(float)*len);
memcpy(&data_out[0], &data_out[len], sizeof(float)*(size - len));
memcpy(&data_out[size - len], tmp, sizeof(float)*len);
free(tmp);
}
void
freq_sink_c_impl::windowreset()
{
filter::firdes::win_type newwintype;
newwintype = d_main_gui->GetFFTWindowType();
if(d_wintype != newwintype) {
d_wintype = newwintype;
buildwindow();
}
}
void
freq_sink_c_impl::buildwindow()
{
d_window.clear();
if(d_wintype != filter::firdes::WIN_NONE) {
d_window = filter::firdes::window(d_wintype, d_fftsize, 6.76);
}
}
void
freq_sink_c_impl::fftresize()
{
gruel::scoped_lock lock(d_mutex);
int newfftsize = d_main_gui->GetFFTSize();
d_fftavg = d_main_gui->GetFFTAverage();
if(newfftsize != d_fftsize) {
// Resize residbuf and replace data
for(int i = 0; i < d_nconnections; i++) {
fft::free(d_residbufs[i]);
fft::free(d_magbufs[i]);
d_residbufs[i] = fft::malloc_complex(newfftsize);
d_magbufs[i] = fft::malloc_double(newfftsize);
memset(d_residbufs[i], 0, newfftsize*sizeof(gr_complex));
memset(d_magbufs[i], 0, newfftsize*sizeof(double));
}
// Set new fft size and reset buffer index
// (throws away any currently held data, but who cares?)
d_fftsize = newfftsize;
d_index = 0;
// Reset window to reflect new size
buildwindow();
// Reset FFTW plan for new size
delete d_fft;
d_fft = new fft::fft_complex(d_fftsize, true);
fft::free(d_fbuf);
d_fbuf = fft::malloc_float(d_fftsize);
memset(d_fbuf, 0, d_fftsize*sizeof(float));
}
}
int
freq_sink_c_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
int j=0;
const gr_complex *in = (const gr_complex*)input_items[0];
// Update the FFT size from the application
fftresize();
windowreset();
for(int i=0; i < noutput_items; i+=d_fftsize) {
unsigned int datasize = noutput_items - i;
unsigned int resid = d_fftsize-d_index;
// If we have enough input for one full FFT, do it
if(datasize >= resid) {
for(int n = 0; n < d_nconnections; n++) {
// Fill up residbuf with d_fftsize number of items
in = (const gr_complex*)input_items[n];
memcpy(d_residbufs[n]+d_index, &in[j], sizeof(gr_complex)*resid);
fft(d_fbuf, d_residbufs[n], d_fftsize);
for(int x = 0; x < d_fftsize; x++) {
d_magbufs[n][x] = (double)((1.0-d_fftavg)*d_magbufs[n][x] + (d_fftavg)*d_fbuf[x]);
}
//volk_32f_convert_64f_a(d_magbufs[n], d_fbuf, d_fftsize);
}
if(gruel::high_res_timer_now() - d_last_time > d_update_time) {
d_last_time = gruel::high_res_timer_now();
d_qApplication->postEvent(d_main_gui,
new FreqUpdateEvent(d_magbufs, d_fftsize));
}
d_index = 0;
j += resid;
}
// Otherwise, copy what we received into the residbuf for next time
else {
for(int n = 0; n < d_nconnections; n++) {
in = (const gr_complex*)input_items[n];
memcpy(d_residbufs[n]+d_index, &in[j], sizeof(gr_complex)*datasize);
}
d_index += datasize;
j += datasize;
}
}
return j;
}
} /* namespace qtgui */
} /* namespace gr */
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