Merging qtgui branch-r9068:9837: this ads a qtgui_sink_c and qtgui_sink_f that displays the time, PSD, and spectrogram plots of a signal put into it. It requires qt4, qwt, and qwtplot3d and has not been tested on OSX.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9853 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 233 insertions, 0 deletions

diff --git a/gr-qtgui/src/lib/qtgui_sink_c.cc b/gr-qtgui/src/lib/qtgui_sink_c.cc
new file mode 100644
index 000000000..eaef58d6e
--- /dev/null
+++ b/gr-qtgui/src/lib/qtgui_sink_c.cc
@@ -0,0 +1,233 @@
+/* -*- 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_c.h>
+#include <gr_io_signature.h>
+#include <string.h>
+
+#include <QTimer>
+
+qtgui_sink_c_sptr
+qtgui_make_sink_c (int fftsize, int wintype,
+		   float fmin, float fmax, const std::string &name)
+{
+  return qtgui_sink_c_sptr (new qtgui_sink_c (fftsize, wintype, fmin, fmax, name));
+}
+
+qtgui_sink_c::qtgui_sink_c (int fftsize, int wintype,
+			    float fmin, float fmax, const std::string &name)
+  : gr_block ("sink_c",
+	      gr_make_io_signature (1, 1, sizeof(gr_complex)),
+	      gr_make_io_signature (0, 0, 0)),
+    d_fftsize(fftsize), d_wintype((gr_firdes::win_type)(wintype)), 
+    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);
+
+  d_fftdata = new gr_complex[d_fftsize];
+
+  d_index = 0;
+  d_residbuf = new gr_complex[d_fftsize];
+
+  buildwindow();
+}
+
+qtgui_sink_c::~qtgui_sink_c()
+{
+  delete [] d_fftdata;
+  delete [] d_residbuf;
+  delete d_main_gui;
+  delete d_fft;
+}
+
+void qtgui_sink_c::lock()
+{
+  pthread_mutex_lock(&d_pmutex);
+}
+
+void qtgui_sink_c::unlock()
+{
+  pthread_mutex_unlock(&d_pmutex);
+}
+
+void
+qtgui_sink_c::start_app()
+{
+  int argc;
+  char **argv = NULL;
+  d_qApplication = new QApplication(argc, argv);
+
+  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->SetFFTSize(d_fftsize);
+  d_main_gui->SetWindowType((int)d_wintype);
+  d_main_gui->OpenSpectrumWindow(NULL);
+
+  qtgui_obj object(d_qApplication);
+  qApp->postEvent(&object, new qtgui_event(&d_pmutex));
+
+  d_qApplication->exec();
+}
+
+
+void
+qtgui_sink_c::fft(const gr_complex *data_in, int size, gr_complex *data_out)
+{
+  if (d_window.size()) {
+    gr_complex *dst = d_fft->get_inbuf();
+    int i;
+    for (i = 0; i < size; i++)		// apply window
+      dst[i] = data_in[i] * d_window[i];
+  }
+  else {
+    memcpy (d_fft->get_inbuf(), data_in, sizeof(gr_complex)*size);
+  }
+
+  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);
+  }
+}
+
+void 
+qtgui_sink_c::windowreset()
+{
+  gr_firdes::win_type newwintype = (gr_firdes::win_type)d_main_gui->GetWindowType();  
+  if(d_wintype != newwintype) {
+    d_wintype = newwintype;
+    buildwindow();
+  }
+}
+
+void
+qtgui_sink_c::buildwindow()
+{
+  d_window.clear();
+  if(d_wintype != 0) {
+    d_window = gr_firdes::window(d_wintype, d_fftsize, 6.76);
+  }
+}
+
+void
+qtgui_sink_c::fftresize()
+{
+  int newfftsize = d_main_gui->GetFFTSize();
+
+  if(newfftsize != d_fftsize) {
+
+    // Resize the fftdata buffer; no need to preserve old data
+    delete [] d_fftdata;
+    d_fftdata = new gr_complex[newfftsize];
+
+    // Resize residbuf and replace data
+    delete [] d_residbuf;
+    d_residbuf = new gr_complex[newfftsize];
+
+    // 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 gri_fft_complex (d_fftsize, true);
+  }
+}
+
+
+int
+qtgui_sink_c::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 gr_complex *in = (const gr_complex*)input_items[0];
+
+  pthread_mutex_lock(&d_pmutex);
+
+  // Update the FFT size from the application
+  fftresize();
+  windowreset();
+
+  if(d_index) {
+    int filler = std::min(d_fftsize - d_index, noutput_items);
+
+    memcpy(&d_residbuf[d_index], &in[0], sizeof(gr_complex)*filler);
+    d_index += filler;
+    i = filler;
+    j = filler;
+  }
+
+  if(d_index == d_fftsize) {
+    d_index = 0;
+    fft(d_residbuf, d_fftsize, d_fftdata);
+    
+    d_main_gui->UpdateWindow(true, d_fftdata, d_fftsize, NULL, 0, (float*)d_residbuf, d_fftsize,
+			     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, d_fftdata);
+      
+      d_main_gui->UpdateWindow(true, d_fftdata, d_fftsize, NULL, 0, (float*)&in[i], d_fftsize,
+			       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(gr_complex)*d_index);
+  }
+
+  pthread_mutex_unlock(&d_pmutex);
+
+  consume_each(noutput_items);
+  return noutput_items;
+}