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/* -*- c++ -*- */
/*
* Copyright 2008 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 <qtgui_sink_f.h>
#include <gr_io_signature.h>
#include <string.h>
#include <QTimer>
qtgui_sink_f_sptr
qtgui_make_sink_f (int fftsize, const std::vector<float> &window,
float fmin, float fmax, const std::string &name)
{
return qtgui_sink_f_sptr (new qtgui_sink_f (fftsize, window, fmin, fmax, name));
}
qtgui_sink_f::qtgui_sink_f (int fftsize, const std::vector<float> &window,
float fmin, float fmax, const std::string &name)
: gr_block ("sink_f",
gr_make_io_signature (1, 1, sizeof(float)),
gr_make_io_signature (0, 0, 0)),
d_fftsize(fftsize), d_window(window),
d_fmin(fmin), d_fmax(fmax), d_name(name)
{
d_main_gui = NULL;
pthread_mutex_init(&d_pmutex, NULL);
lock();
d_shift = true; // Perform fftshift operation; this is usually desired when plotting
d_fft = new gri_fft_complex (d_fftsize, true);
fftdata = new gr_complex[d_fftsize];
d_index = 0;
d_residbuf = new float[d_fftsize];
}
qtgui_sink_f::~qtgui_sink_f()
{
delete [] fftdata;
delete [] d_residbuf;
delete d_main_gui;
delete d_fft;
}
void qtgui_sink_f::lock()
{
pthread_mutex_lock(&d_pmutex);
}
void qtgui_sink_f::unlock()
{
pthread_mutex_unlock(&d_pmutex);
}
void
qtgui_sink_f::start_app()
{
d_qApplication = new QApplication(0, NULL);
uint64_t maxBufferSize = 32768;
d_main_gui = new SpectrumGUIClass(maxBufferSize, d_fftsize, d_fmin, d_fmax);
d_main_gui->SetDisplayTitle(d_name);
d_main_gui->OpenSpectrumWindow(NULL);
qtgui_obj object(d_qApplication);
qApp->postEvent(&object, new qtgui_event(&d_pmutex));
d_qApplication->exec();
}
void
qtgui_sink_f::fft(const float *data_in, int size, gr_complex *data_out)
{
if (d_window.size()) {
gr_complex *dst = d_fft->get_inbuf();
for (int i = 0; i < size; i++) // apply window
dst[i] = data_in[i] * d_window[i];
}
else {
gr_complex *dst = d_fft->get_inbuf();
for (unsigned int i = 0; i < size; i++) // float to complex conversion
dst[i] = data_in[i];
}
d_fft->execute (); // compute the fft
for(int i=0; i < size; i++) {
d_fft->get_outbuf()[i] /= size;
}
// copy result to our output
if(d_shift) { // apply a fft shift on the data
unsigned int len = (unsigned int)(ceil(size/2.0));
memcpy(&data_out[0], &d_fft->get_outbuf()[len], sizeof(gr_complex)*(size - len));
memcpy(&data_out[size - len], &d_fft->get_outbuf()[0], sizeof(gr_complex)*len);
}
else {
memcpy(data_out, d_fft->get_outbuf(), sizeof(gr_complex)*size);
}
}
int
qtgui_sink_f::general_work (int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
int i=0, j=0;
const float *in = (const float*)input_items[0];
pthread_mutex_lock(&d_pmutex);
if(d_index) {
int filler = std::min(d_fftsize - d_index, noutput_items);
memcpy(&d_residbuf[d_index], &in[0], sizeof(float)*filler);
d_index += filler;
i = filler;
j = filler;
}
if(d_index == d_fftsize) {
d_index = 0;
fft(d_residbuf, d_fftsize, fftdata);
d_main_gui->UpdateWindow(true, fftdata, d_fftsize, d_residbuf, d_fftsize, NULL, 0,
1.0/4.0, convert_to_timespec(0.0), true);
}
for(; i < noutput_items; i+=d_fftsize) {
if(noutput_items - i > d_fftsize) {
j += d_fftsize;
fft(&in[i], d_fftsize, fftdata);
d_main_gui->UpdateWindow(true, fftdata, d_fftsize, &in[i], d_fftsize, NULL, 0,
1.0/4.0, convert_to_timespec(0.0), true);
}
}
if(noutput_items > j) {
d_index = noutput_items - j;
memcpy(d_residbuf, &in[j], sizeof(float)*d_index);
}
pthread_mutex_unlock(&d_pmutex);
consume_each(noutput_items);
return noutput_items;
}
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