updating FFT plotting utilities. New file gr_plot_fft.py can plot any data type with -d flag and gr_plot_fft_c and gr_plot_fft_f just call this one and pass in complex of float data types.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9842 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 4 insertions, 194 deletions

diff --git a/gr-utils/src/python/gr_plot_fft_f.py b/gr-utils/src/python/gr_plot_fft_f.py
index 8f545c589..f50358f01 100755
--- a/gr-utils/src/python/gr_plot_fft_f.py
+++ b/gr-utils/src/python/gr_plot_fft_f.py
@@ -20,201 +20,11 @@
 # Boston, MA 02110-1301, USA.
 # 
 
-try:
-    import scipy
-    from scipy import fftpack
-except ImportError:
-    print "Please install SciPy to run this script (http://www.scipy.org/)"
-    raise SystemExit, 1
+import gr_plot_fft
 
-try:
-    from pylab import *
-except ImportError:
-    print "Please install Matplotlib to run this script (http://matplotlib.sourceforge.net/)"
-    raise SystemExit, 1
-
-from optparse import OptionParser
-from math import log10
-
-matplotlib.interactive(True)
-matplotlib.use('TkAgg')
-
-class draw_fft_f:
-    def __init__(self, filename, options):
-        self.hfile = open(filename, "r")
-        self.block_length = options.block
-        self.start = options.start
-        self.sample_rate = options.sample_rate
-
-        self.datatype = scipy.float32
-        self.sizeof_data = self.datatype().nbytes    # number of bytes per sample in file
-
-        self.axis_font_size = 16
-        self.label_font_size = 18
-        self.title_font_size = 20
-        self.text_size = 22
-
-        # Setup PLOT
-        self.fig = figure(1, figsize=(16, 9), facecolor='w')
-        rcParams['xtick.labelsize'] = self.axis_font_size
-        rcParams['ytick.labelsize'] = self.axis_font_size
-        
-        self.text_file     = figtext(0.10, 0.94, ("File: %s" % filename), weight="heavy", size=self.text_size)
-        self.text_file_pos = figtext(0.10, 0.88, "File Position: ", weight="heavy", size=self.text_size)
-        self.text_block    = figtext(0.40, 0.88, ("Block Size: %d" % self.block_length),
-                                     weight="heavy", size=self.text_size)
-        self.text_sr       = figtext(0.60, 0.88, ("Sample Rate: %.2f" % self.sample_rate),
-                                     weight="heavy", size=self.text_size)
-        self.make_plots()
-
-        self.button_left_axes = self.fig.add_axes([0.45, 0.01, 0.05, 0.05], frameon=True)
-        self.button_left = Button(self.button_left_axes, "<")
-        self.button_left_callback = self.button_left.on_clicked(self.button_left_click)
-
-        self.button_right_axes = self.fig.add_axes([0.50, 0.01, 0.05, 0.05], frameon=True)
-        self.button_right = Button(self.button_right_axes, ">")
-        self.button_right_callback = self.button_right.on_clicked(self.button_right_click)
-
-        self.xlim = self.sp_f.get_xlim()
-
-        self.manager = get_current_fig_manager()
-        connect('draw_event', self.zoom)
-        connect('key_press_event', self.click)
-        show()
-        
-    def get_data(self):
-        self.text_file_pos.set_text("File Position: %d" % (self.hfile.tell()//self.sizeof_data))
-        self.floats = scipy.fromfile(self.hfile, dtype=self.datatype, count=self.block_length)
-        #print "Read in %d items" % len(self.floats)
-        if(len(self.floats) == 0):
-            print "End of File"
-        else:
-            self.f_fft = self.dofft(self.floats)
-
-            self.time = [i*(1/self.sample_rate) for i in range(len(self.floats))]
-            self.freq = self.calc_freq(self.time, self.sample_rate)
-            
-    def dofft(self, f):
-        N = len(f)
-        f_fft = fftpack.fftshift(scipy.fft(f))       # fft and shift axis
-        f_dB = list()
-        for f in f_fft:
-            try:
-                f_dB.append(20*log10(abs(f/N)))  # convert to decibels, adjust power
-            except OverflowError:                # protect against taking log(0)
-                f = 1e-14                        # not sure if this is the best way to do this
-                f_dB.append(20*log10(abs(f/N)))
-                
-        return f_dB
-
-    def calc_freq(self, time, sample_rate):
-        N = len(time)
-        Fs = 1.0 / (max(time) - min(time))
-        Fn = 0.5 * sample_rate
-        freq = [-Fn + i*Fs for i in range(N)]
-        return freq
-        
-    def make_plots(self):
-        # if specified on the command-line, set file pointer
-        self.hfile.seek(self.sizeof_data*self.start, 1)
-
-        self.get_data()
-        
-        # Subplot for real and imaginary parts of signal
-        self.sp_f = self.fig.add_subplot(2,1,1, position=[0.075, 0.2, 0.4, 0.6])
-        self.sp_f.set_title(("Amplitude"), fontsize=self.title_font_size, fontweight="bold")
-        self.sp_f.set_xlabel("Time (s)", fontsize=self.label_font_size, fontweight="bold")
-        self.sp_f.set_ylabel("Amplitude (V)", fontsize=self.label_font_size, fontweight="bold")
-        self.plot_f = plot(self.time, self.floats, 'bo-')
-        self.sp_f.set_ylim([1.5*min(self.floats),
-                            1.5*max(self.floats)])
-
-        # Subplot for constellation plot
-        self.sp_fft = self.fig.add_subplot(2,2,1, position=[0.575, 0.2, 0.4, 0.6])
-        self.sp_fft.set_title(("FFT"), fontsize=self.title_font_size, fontweight="bold")
-        self.sp_fft.set_xlabel("Frequency (Hz)", fontsize=self.label_font_size, fontweight="bold")
-        self.sp_fft.set_ylabel("Power (dBm)", fontsize=self.label_font_size, fontweight="bold")
-        self.plot_fft = plot(self.freq, self.f_fft, '-bo')
-        self.sp_fft.set_ylim([min(self.f_fft)-10, max(self.f_fft)+10])
-        
-        draw()
-
-    def update_plots(self):
-        self.plot_f[0].set_data([self.time, self.floats])
-        self.sp_f.set_ylim([1.5*min(self.floats),
-                            1.5*max(self.floats)])
-
-        self.plot_fft[0].set_data([self.freq, self.f_fft])
-        self.sp_fft.set_ylim([min(self.f_fft)-10, max(self.f_fft)+10])
-
-        draw()
-        
-    def zoom(self, event):
-        newxlim = self.sp_f.get_xlim()
-        if(newxlim != self.xlim):
-            self.xlim = newxlim
-            xmin = max(0, int(ceil(self.sample_rate*self.xlim[0])))
-            xmax = min(int(ceil(self.sample_rate*self.xlim[1])), len(self.floats))
-
-            f = self.floats[xmin : xmax]
-            time = self.time[xmin : xmax]
-            
-            f_fft = self.dofft(f)
-            freq = self.calc_freq(time, self.sample_rate)
-                        
-            self.plot_fft[0].set_data(freq, f_fft)
-            self.sp_fft.axis([min(freq), max(freq),
-                              min(f_fft)-10, max(f_fft)+10])
-
-            draw()
-
-    def click(self, event):
-        forward_valid_keys = [" ", "down", "right"]
-        backward_valid_keys = ["up", "left"]
-
-        if(find(event.key, forward_valid_keys)):
-            self.step_forward()
-            
-        elif(find(event.key, backward_valid_keys)):
-            self.step_backward()
-
-    def button_left_click(self, event):
-        self.step_backward()
-
-    def button_right_click(self, event):
-        self.step_forward()
-
-    def step_forward(self):
-        self.get_data()
-        self.update_plots()
-
-    def step_backward(self):
-        # Step back in file position
-        if(self.hfile.tell() >= 2*self.sizeof_data*self.block_length ):
-            self.hfile.seek(-2*self.sizeof_data*self.block_length, 1)
-        else:
-            self.hfile.seek(-self.hfile.tell(),1)
-        self.get_data()
-        self.update_plots()
-        
-            
-def find(item_in, list_search):
-    try:
-	return list_search.index(item_in) != None
-    except ValueError:
-	return False
-		
 def main():
-    usage="%prog: [options] input_filename"
-    description = "Takes a GNU Radio floating point binary file and displays the sample data versus time as well as the frequency domain (FFT) plot. The y-axis values are plotted assuming volts as the amplitude of the I&Q streams and converted into dBm in the frequency domain (the 1/N power adjustment out of the FFT is performed internally). The script plots a certain block of data at a time, specified on the command line as -B or --block. This value defaults to 1000. The start position in the file can be set by specifying -s or --start and defaults to 0 (the start of the file). By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time and frequency axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples."
-
-    parser = OptionParser(conflict_handler="resolve", usage=usage, description=description)
-    parser.add_option("-B", "--block", type="int", default=1000,
-                      help="Specify the block size [default=%default]")
-    parser.add_option("-s", "--start", type="int", default=0,
-                      help="Specify where to start in the file [default=%default]")
-    parser.add_option("-R", "--sample-rate", type="float", default=1.0,
-                      help="Set the sampler rate of the data [default=%default]")
+    parser = gr_plot_fft.setup_options()
+    parser.remove_option("--data-type")
     
     (options, args) = parser.parse_args ()
     if len(args) != 1:
@@ -222,7 +32,7 @@ def main():
         raise SystemExit, 1
     filename = args[0]
 
-    dc = draw_fft_f(filename, options)
+    dc = gr_plot_fft.gr_plot_fft("float32", filename, options)
 
 if __name__ == "__main__":
     try: