git.gag.com Git - debian/gnuradio/blob - gr-radio-astronomy/src/python/ra_waterfallsink.py

   1 #!/usr/bin/env python
   2 #
   3 # Copyright 2003,2004,2005 Free Software Foundation, Inc.
   4 #
   5 # This file is part of GNU Radio
   6 #
   7 # GNU Radio is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3, or (at your option)
  10 # any later version.
  11 #
  12 # GNU Radio is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with GNU Radio; see the file COPYING.  If not, write to
  19 # the Free Software Foundation, Inc., 51 Franklin Street,
  20 # Boston, MA 02110-1301, USA.
  21 #
  22
  23 from gnuradio import gr, gru, window
  24 from gnuradio.wxgui import stdgui
  25 import wx
  26 import gnuradio.wxgui.plot as plot
  27 import Numeric
  28 import os
  29 import threading
  30 import math
  31
  32 default_fftsink_size = (640,240)
  33 default_fft_rate = gr.prefs().get_long('wxgui', 'fft_rate', 15)
  34
  35 class ra_waterfallsink_base(object):
  36     def __init__(self, input_is_real=False, baseband_freq=0,
  37                  sample_rate=1, fft_size=512,
  38                  fft_rate=default_fft_rate,
  39                  average=False, avg_alpha=None, title='', ofunc=None, xydfunc=None, scaling=100):
  40
  41         # initialize common attributes
  42         self.baseband_freq = baseband_freq
  43         self.sample_rate = sample_rate
  44         self.fft_size = fft_size
  45         self.fft_rate = fft_rate
  46         self.average = average
  47         self.ofunc = ofunc
  48         self.xydfunc = xydfunc
  49         self.scaling = scaling
  50         if avg_alpha is None:
  51             self.avg_alpha = 2.0 / fft_rate
  52         else:
  53             self.avg_alpha = avg_alpha
  54         self.title = title
  55         self.input_is_real = input_is_real
  56         self.msgq = gr.msg_queue(2)         # queue up to 2 messages
  57
  58     def set_average(self, average):
  59         self.average = average
  60         if average:
  61             self.avg.set_taps(self.avg_alpha)
  62         else:
  63             self.avg.set_taps(1.0)
  64
  65     def set_avg_alpha(self, avg_alpha):
  66         self.avg_alpha = avg_alpha
  67
  68     def set_baseband_freq(self, baseband_freq):
  69         self.baseband_freq = baseband_freq
  70
  71     def set_sample_rate(self, sample_rate):
  72         self.sample_rate = sample_rate
  73         self._set_n()
  74
  75     def set_scaling(self,scaling):
  76         self.scaling = scaling
  77         return
  78
  79     def _set_n(self):
  80         self.one_in_n.set_n(max(1, int(self.sample_rate/self.fft_size/self.fft_rate)))
  81
  82 class ra_waterfallsink_f(gr.hier_block, ra_waterfallsink_base):
  83     def __init__(self, fg, parent, baseband_freq=0,
  84                  y_per_div=10, ref_level=50, sample_rate=1, fft_size=512,
  85                  fft_rate=default_fft_rate, average=False, avg_alpha=None,
  86                  title='', scaling=100, size=default_fftsink_size, ofunc=None, xydfunc=None):
  87
  88         ra_waterfallsink_base.__init__(self, input_is_real=True, baseband_freq=baseband_freq,
  89                                sample_rate=sample_rate, fft_size=fft_size,
  90                                fft_rate=fft_rate,
  91                                average=average, avg_alpha=avg_alpha, title=title, ofunc=ofunc, xydfunc=xydfunc, scaling=scaling)
  92
  93         s2p = gr.serial_to_parallel(gr.sizeof_float, self.fft_size)
  94         self.one_in_n = gr.keep_one_in_n(gr.sizeof_float * self.fft_size,
  95                                          max(1, int(self.sample_rate/self.fft_size/self.fft_rate)))
  96         mywindow = window.blackmanharris(self.fft_size)
  97         fft = gr.fft_vfc(self.fft_size, True, mywindow)
  98         c2mag = gr.complex_to_mag(self.fft_size)
  99         self.avg = gr.single_pole_iir_filter_ff(1.0, self.fft_size)
 100         log = gr.nlog10_ff(20, self.fft_size, -20*math.log10(self.fft_size))
 101         sink = gr.message_sink(gr.sizeof_float * self.fft_size, self.msgq, True)
 102
 103         fg.connect (s2p, self.one_in_n, fft, c2mag, self.avg, log, sink)
 104         gr.hier_block.__init__(self, fg, s2p, sink)
 105
 106         self.win = ra_waterfall_window(self, parent, size=size)
 107         self.set_average(self.average)
 108
 109
 110 class ra_waterfallsink_c(gr.hier_block, ra_waterfallsink_base):
 111     def __init__(self, fg, parent, baseband_freq=0,
 112                  y_per_div=10, ref_level=50, sample_rate=1, fft_size=512,
 113                  fft_rate=default_fft_rate, average=False,
 114                  avg_alpha=None, scaling=100,
 115                  title='', size=default_fftsink_size, ofunc=None, xydfunc=None):
 116
 117         ra_waterfallsink_base.__init__(self, input_is_real=False, baseband_freq=baseband_freq,
 118                                      sample_rate=sample_rate, fft_size=fft_size,
 119                                      fft_rate=fft_rate,
 120                                      average=average,
 121                                      avg_alpha=avg_alpha,
 122                                      title=title, ofunc=ofunc,
 123                                      xydfunc=xydfunc, scaling=scaling)
 124
 125         s2p = gr.serial_to_parallel(gr.sizeof_gr_complex, self.fft_size)
 126         self.one_in_n = gr.keep_one_in_n(gr.sizeof_gr_complex * self.fft_size,
 127                                          max(1, int(self.sample_rate/self.fft_size/self.fft_rate)))
 128
 129         mywindow = window.blackmanharris(self.fft_size)
 130         fft = gr.fft_vcc(self.fft_size, True, mywindow)
 131         c2mag = gr.complex_to_mag(self.fft_size)
 132         self.avg = gr.single_pole_iir_filter_ff(1.0, self.fft_size)
 133         log = gr.nlog10_ff(20, self.fft_size, -20*math.log10(self.fft_size))
 134         sink = gr.message_sink(gr.sizeof_float * self.fft_size, self.msgq, True)
 135
 136         fg.connect(s2p, self.one_in_n, fft, c2mag, self.avg, log, sink)
 137         gr.hier_block.__init__(self, fg, s2p, sink)
 138
 139         self.win = ra_waterfall_window(self, parent, size=size)
 140         self.set_average(self.average)
 141
 142
 143 # ------------------------------------------------------------------------
 144
 145 myDATA_EVENT = wx.NewEventType()
 146 EVT_DATA_EVENT = wx.PyEventBinder (myDATA_EVENT, 0)
 147
 148
 149 class DataEvent(wx.PyEvent):
 150     def __init__(self, data):
 151         wx.PyEvent.__init__(self)
 152         self.SetEventType (myDATA_EVENT)
 153         self.data = data
 154
 155     def Clone (self):
 156         self.__class__ (self.GetId())
 157
 158
 159 class input_watcher (threading.Thread):
 160     def __init__ (self, msgq, fft_size, event_receiver, **kwds):
 161         threading.Thread.__init__ (self, **kwds)
 162         self.setDaemon (1)
 163         self.msgq = msgq
 164         self.fft_size = fft_size
 165         self.event_receiver = event_receiver
 166         self.keep_running = True
 167         self.start ()
 168
 169     def run (self):
 170         while (self.keep_running):
 171             msg = self.msgq.delete_head()  # blocking read of message queue
 172             itemsize = int(msg.arg1())
 173             nitems = int(msg.arg2())
 174
 175             s = msg.to_string()            # get the body of the msg as a string
 176
 177             # There may be more than one FFT frame in the message.
 178             # If so, we take only the last one
 179             if nitems > 1:
 180                 start = itemsize * (nitems - 1)
 181                 s = s[start:start+itemsize]
 182
 183             complex_data = Numeric.fromstring (s, Numeric.Float32)
 184             de = DataEvent (complex_data)
 185             wx.PostEvent (self.event_receiver, de)
 186             del de
 187
 188
 189 class ra_waterfall_window (wx.Panel):
 190     def __init__ (self, fftsink, parent, id = -1,
 191                   pos = wx.DefaultPosition, size = wx.DefaultSize,
 192                   style = wx.DEFAULT_FRAME_STYLE, name = ""):
 193         wx.Panel.__init__(self, parent, id, pos, size, style, name)
 194
 195         self.fftsink = fftsink
 196         self.bm = wx.EmptyBitmap(1024, 512, -1)
 197
 198         self.scale_factor = self.fftsink.scaling
 199
 200         dc1 = wx.MemoryDC()
 201         dc1.SelectObject(self.bm)
 202         dc1.Clear()
 203
 204         self.pens = self.make_pens()
 205
 206         wx.EVT_PAINT( self, self.OnPaint )
 207         wx.EVT_CLOSE (self, self.on_close_window)
 208         EVT_DATA_EVENT (self, self.set_data)
 209
 210         self.build_popup_menu()
 211
 212         wx.EVT_CLOSE (self, self.on_close_window)
 213         self.Bind(wx.EVT_RIGHT_UP, self.on_right_click)
 214         self.Bind(wx.EVT_MOTION, self.on_motion)
 215
 216         self.input_watcher = input_watcher(fftsink.msgq, fftsink.fft_size, self)
 217
 218
 219     def on_close_window (self, event):
 220         print "ra_waterfall_window: on_close_window"
 221         self.keep_running = False
 222
 223     def const_list(self,const,len):
 224         return [const] * len
 225
 226     def make_colormap(self):
 227         r = []
 228         r.extend(self.const_list(0,96))
 229         r.extend(range(0,255,4))
 230         r.extend(self.const_list(255,64))
 231         r.extend(range(255,128,-4))
 232
 233         g = []
 234         g.extend(self.const_list(0,32))
 235         g.extend(range(0,255,4))
 236         g.extend(self.const_list(255,64))
 237         g.extend(range(255,0,-4))
 238         g.extend(self.const_list(0,32))
 239
 240         b = range(128,255,4)
 241         b.extend(self.const_list(255,64))
 242         b.extend(range(255,0,-4))
 243         b.extend(self.const_list(0,96))
 244         return (r,g,b)
 245
 246     def make_pens(self):
 247         (r,g,b) = self.make_colormap()
 248         pens = []
 249         for i in range(0,256):
 250             colour = wx.Colour(r[i], g[i], b[i])
 251             pens.append( wx.Pen(colour, 2, wx.SOLID))
 252         return pens
 253
 254     def OnPaint(self, event):
 255         dc = wx.PaintDC(self)
 256         self.DoDrawing(dc)
 257
 258     def DoDrawing(self, dc=None):
 259         if dc is None:
 260             dc = wx.ClientDC(self)
 261         dc.DrawBitmap(self.bm, 0, 0, False )
 262
 263
 264     def const_list(self,const,len):
 265         a = [const]
 266         for i in range(1,len):
 267             a.append(const)
 268         return a
 269
 270     def make_colormap(self):
 271         r = []
 272         r.extend(self.const_list(0,96))
 273         r.extend(range(0,255,4))
 274         r.extend(self.const_list(255,64))
 275         r.extend(range(255,128,-4))
 276
 277         g = []
 278         g.extend(self.const_list(0,32))
 279         g.extend(range(0,255,4))
 280         g.extend(self.const_list(255,64))
 281         g.extend(range(255,0,-4))
 282         g.extend(self.const_list(0,32))
 283
 284         b = range(128,255,4)
 285         b.extend(self.const_list(255,64))
 286         b.extend(range(255,0,-4))
 287         b.extend(self.const_list(0,96))
 288         return (r,g,b)
 289
 290     def set_data (self, evt):
 291         dB = evt.data
 292         L = len (dB)
 293
 294         if (self.fftsink.ofunc != None):
 295             self.fftsink.ofunc (evt.data, L)
 296
 297         dc1 = wx.MemoryDC()
 298         dc1.SelectObject(self.bm)
 299         dc1.Blit(0,1,1024,512,dc1,0,0,wx.COPY,False,-1,-1)
 300
 301         x = max(abs(self.fftsink.sample_rate), abs(self.fftsink.baseband_freq))
 302         if x >= 1e9:
 303             sf = 1e-9
 304             units = "GHz"
 305         elif x >= 1e6:
 306             sf = 1e-6
 307             units = "MHz"
 308         else:
 309             sf = 1e-3
 310             units = "kHz"
 311
 312
 313         if self.fftsink.input_is_real:     # only plot 1/2 the points
 314             d_max = L/2
 315             p_width = 2
 316         else:
 317             d_max = L/2
 318             p_width = 1
 319
 320         WATERFALL_WIDTH=1024
 321         scale_factor = self.scale_factor
 322         x_positions = Numeric.zeros(WATERFALL_WIDTH, Numeric.Float64)
 323         y_values = Numeric.zeros(WATERFALL_WIDTH, Numeric.Float64)
 324         x_scale = L / WATERFALL_WIDTH
 325         x_scale = int(x_scale)
 326         if self.fftsink.input_is_real:     # real fft
 327            for x_pos in range(0, d_max):
 328                value = int(dB[x_pos] * scale_factor)
 329                value = min(255, max(0, value))
 330                idx = int(x_pos/x_scale)
 331                idx = min(WATERFALL_WIDTH-1,idx)
 332                x_positions[idx] = idx
 333                y_values[idx] = y_values[idx] + value
 334         else:                               # complex fft
 335            for x_pos in range(0, d_max):    # positive freqs
 336                value = int(dB[x_pos] * scale_factor)
 337                value = min(255, max(0, value))
 338                idx = int((x_pos+d_max)/x_scale)
 339                idx = min(WATERFALL_WIDTH-1,idx)
 340                x_positions[idx] = idx
 341                y_values[idx] = y_values[idx] + value
 342            for x_pos in range(0 , d_max):   # negative freqs
 343                value = int(dB[x_pos+d_max] * scale_factor)
 344                value = min(255, max(0, value))
 345                idx = int((x_pos)/x_scale)
 346                idx = min(WATERFALL_WIDTH-1,idx)
 347                x_positions[idx] = idx
 348                y_values[idx] = y_values[idx] + value
 349
 350         for i in range(0,WATERFALL_WIDTH):
 351             yv = y_values[i]/x_scale
 352             yv = int(min(255,yv))
 353             dc1.SetPen(self.pens[yv])
 354             dc1.DrawRectangle(i*p_width, 0, p_width, 1)
 355
 356         self.DoDrawing (None)
 357
 358     def on_average(self, evt):
 359         # print "on_average"
 360         self.fftsink.set_average(evt.IsChecked())
 361
 362     def on_right_click(self, event):
 363         menu = self.popup_menu
 364         for id, pred in self.checkmarks.items():
 365             item = menu.FindItemById(id)
 366             item.Check(pred())
 367         self.PopupMenu(menu, event.GetPosition())
 368
 369     def on_motion(self, event):
 370         if not self.fftsink.xydfunc == None:
 371             pos = event.GetPosition()
 372             self.fftsink.xydfunc(pos)
 373
 374     def on_scaling(self, evt):
 375         Id = evt.GetId()
 376         if Id == self.id_scaling_100:
 377             self.fftsink.set_scaling(100)
 378         elif Id == self.id_scaling_150:
 379             self.fftsink.set_scaling(150)
 380         elif Id == self.id_scaling_200:
 381             self.fftsink.set_scaling(200)
 382         elif Id == self.id_scaling_250:
 383             self.fftsink.set_scaling(250)
 384         elif Id == self.id_scaling_300:
 385             self.fftsink.set_scaling(300)
 386
 387     def build_popup_menu(self):
 388         self.id_scaling_100 = wx.NewId()
 389         self.id_scaling_150 = wx.NewId()
 390         self.id_scaling_200 = wx.NewId()
 391         self.id_scaling_250 = wx.NewId()
 392         self.id_scaling_300 = wx.NewId()
 393         self.id_average = wx.NewId()
 394
 395         self.Bind(wx.EVT_MENU, self.on_average, id=self.id_average)
 396         self.Bind(wx.EVT_MENU, self.on_scaling, id=self.id_scaling_100)
 397         self.Bind(wx.EVT_MENU, self.on_scaling, id=self.id_scaling_150)
 398         self.Bind(wx.EVT_MENU, self.on_scaling, id=self.id_scaling_200)
 399         self.Bind(wx.EVT_MENU, self.on_scaling, id=self.id_scaling_250)
 400         self.Bind(wx.EVT_MENU, self.on_scaling, id=self.id_scaling_300)
 401
 402
 403         # make a menu
 404         menu = wx.Menu()
 405         self.popup_menu = menu
 406         menu.AppendCheckItem(self.id_average, "Average")
 407         menu.AppendCheckItem(self.id_scaling_100, "100 scale factor")
 408         menu.AppendCheckItem(self.id_scaling_150, "150 scale factor")
 409         menu.AppendCheckItem(self.id_scaling_200, "200 scale factor")
 410         menu.AppendCheckItem(self.id_scaling_250, "250 scale factor")
 411         menu.AppendCheckItem(self.id_scaling_300, "300 scale factor")
 412
 413         self.checkmarks = {
 414             self.id_average : lambda : self.fftsink.average,
 415             self.id_scaling_100 : lambda : self.fftsink.scaling == 100,
 416             self.id_scaling_150 : lambda : self.fftsink.scaling == 150,
 417             self.id_scaling_200 : lambda : self.fftsink.scaling == 200,
 418             self.id_scaling_250 : lambda : self.fftsink.scaling == 250,
 419             self.id_scaling_300 : lambda : self.fftsink.scaling == 300,
 420             }
 421
 422
 423 def next_up(v, seq):
 424     """
 425     Return the first item in seq that is > v.
 426     """
 427     for s in seq:
 428         if s > v:
 429             return s
 430     return v
 431
 432 def next_down(v, seq):
 433     """
 434     Return the last item in seq that is < v.
 435     """
 436     rseq = list(seq[:])
 437     rseq.reverse()
 438
 439     for s in rseq:
 440         if s < v:
 441             return s
 442     return v
 443
 444
 445 # ----------------------------------------------------------------
 446 #                     Deprecated interfaces
 447 # ----------------------------------------------------------------
 448
 449 # returns (block, win).
 450 #   block requires a single input stream of float
 451 #   win is a subclass of wxWindow
 452
 453 def make_ra_waterfallsink_f(fg, parent, title, fft_size, input_rate):
 454
 455     block = ra_waterfallsink_f(fg, parent, title=title, fft_size=fft_size,
 456                              sample_rate=input_rate)
 457     return (block, block.win)
 458
 459 # returns (block, win).
 460 #   block requires a single input stream of gr_complex
 461 #   win is a subclass of wxWindow
 462
 463 def make_ra_waterfallsink_c(fg, parent, title, fft_size, input_rate):
 464     block = ra_waterfallsink_c(fg, parent, title=title, fft_size=fft_size,
 465                              sample_rate=input_rate)
 466     return (block, block.win)
 467
 468
 469 # ----------------------------------------------------------------
 470 # Standalone test app
 471 # ----------------------------------------------------------------
 472
 473 class test_app_flow_graph (stdgui.gui_flow_graph):
 474     def __init__(self, frame, panel, vbox, argv):
 475         stdgui.gui_flow_graph.__init__ (self, frame, panel, vbox, argv)
 476
 477         fft_size = 512
 478
 479         # build our flow graph
 480         input_rate = 20.000e3
 481
 482         # Generate a complex sinusoid
 483         src1 = gr.sig_source_c (input_rate, gr.GR_SIN_WAVE, 5.75e3, 1000)
 484         #src1 = gr.sig_source_c (input_rate, gr.GR_CONST_WAVE, 5.75e3, 1000)
 485
 486         # We add these throttle blocks so that this demo doesn't
 487         # suck down all the CPU available.  Normally you wouldn't use these.
 488         thr1 = gr.throttle(gr.sizeof_gr_complex, input_rate)
 489
 490         sink1 = ra_waterfallsink_c (self, panel, title="Complex Data", fft_size=fft_size,
 491                                   sample_rate=input_rate, baseband_freq=100e3)
 492         vbox.Add (sink1.win, 1, wx.EXPAND)
 493         self.connect (src1, thr1, sink1)
 494
 495         # generate a real sinusoid
 496         src2 = gr.sig_source_f (input_rate, gr.GR_SIN_WAVE, 5.75e3, 1000)
 497         #src2 = gr.sig_source_f (input_rate, gr.GR_CONST_WAVE, 5.75e3, 1000)
 498         thr2 = gr.throttle(gr.sizeof_float, input_rate)
 499         sink2 = ra_waterfallsink_f (self, panel, title="Real Data", fft_size=fft_size,
 500                                   sample_rate=input_rate, baseband_freq=100e3)
 501         vbox.Add (sink2.win, 1, wx.EXPAND)
 502         self.connect (src2, thr2, sink2)
 503
 504 def main ():
 505     app = stdgui.stdapp (test_app_flow_graph,
 506                          "Waterfall Sink Test App")
 507     app.MainLoop ()
 508
 509 if __name__ == '__main__':
 510     main ()