numbersink.py

这是用python语言写的一个数字广播的信号处理工具包。利用它

        elif Id == self.id_decimal_places_9:
            self.numbersink.set_decimal_places(9)

        
    def on_right_click(self, event):
        menu = self.popup_menu
        for id, pred in self.checkmarks.items():
            item = menu.FindItemById(id)
            item.Check(pred())
        self.PopupMenu(menu, event.GetPosition())


    def build_popup_menu(self):
        #self.id_hide_gauge = wx.NewId()
        self.id_show_gauge = wx.NewId()
        self.id_incr_ref_level = wx.NewId()
        self.id_decr_ref_level = wx.NewId()
        self.id_incr_decimal_places = wx.NewId()
        self.id_decr_decimal_places = wx.NewId()
        self.id_decimal_places_0 = wx.NewId()
        self.id_decimal_places_1 = wx.NewId()
        self.id_decimal_places_2 = wx.NewId()
        self.id_decimal_places_3 = wx.NewId()
        self.id_decimal_places_6 = wx.NewId()
        self.id_decimal_places_9 = wx.NewId()
        self.id_average = wx.NewId()
        self.id_peak_hold = wx.NewId()

        self.Bind(wx.EVT_MENU, self.on_average, id=self.id_average)
        self.Bind(wx.EVT_MENU, self.on_peak_hold, id=self.id_peak_hold)
        #self.Bind(wx.EVT_MENU, self.on_hide_gauge, id=self.id_hide_gauge)
        self.Bind(wx.EVT_MENU, self.on_show_gauge, id=self.id_show_gauge)
        self.Bind(wx.EVT_MENU, self.on_incr_ref_level, id=self.id_incr_ref_level)
        self.Bind(wx.EVT_MENU, self.on_decr_ref_level, id=self.id_decr_ref_level)
        self.Bind(wx.EVT_MENU, self.on_incr_decimal_places, id=self.id_incr_decimal_places)
        self.Bind(wx.EVT_MENU, self.on_decr_decimal_places, id=self.id_decr_decimal_places)
        self.Bind(wx.EVT_MENU, self.on_decimal_places, id=self.id_decimal_places_0)
        self.Bind(wx.EVT_MENU, self.on_decimal_places, id=self.id_decimal_places_1)
        self.Bind(wx.EVT_MENU, self.on_decimal_places, id=self.id_decimal_places_2)
        self.Bind(wx.EVT_MENU, self.on_decimal_places, id=self.id_decimal_places_3)
        self.Bind(wx.EVT_MENU, self.on_decimal_places, id=self.id_decimal_places_6)
        self.Bind(wx.EVT_MENU, self.on_decimal_places, id=self.id_decimal_places_9)


        # make a menu
        menu = wx.Menu()
        self.popup_menu = menu
        menu.AppendCheckItem(self.id_average, "Average")
        menu.AppendCheckItem(self.id_peak_hold, "Peak Hold")
        #menu.Append(self.id_hide_gauge, "Hide gauge")
        menu.AppendCheckItem(self.id_show_gauge, "Show gauge")
        menu.Append(self.id_incr_ref_level, "Incr Ref Level")
        menu.Append(self.id_decr_ref_level, "Decr Ref Level")
        menu.Append(self.id_incr_decimal_places, "Incr decimal places")
        menu.Append(self.id_decr_decimal_places, "Decr decimal places")
        menu.AppendSeparator()
        # we'd use RadioItems for these, but they're not supported on Mac
        menu.AppendCheckItem(self.id_decimal_places_0, "0 decimal places")
        menu.AppendCheckItem(self.id_decimal_places_1, "1 decimal places")
        menu.AppendCheckItem(self.id_decimal_places_2, "2 decimal places")
        menu.AppendCheckItem(self.id_decimal_places_3, "3 decimal places")
        menu.AppendCheckItem(self.id_decimal_places_6, "6 decimal places")
        menu.AppendCheckItem(self.id_decimal_places_9, "9 decimal places")

        self.checkmarks = {
            self.id_average : lambda : self.numbersink.average,
            self.id_peak_hold : lambda : self.numbersink.peak_hold,#            self.id_hide_gauge : lambda : self.numbersink.hide_gauge,
            self.id_show_gauge : lambda : self.numbersink.show_gauge,
            self.id_decimal_places_0 : lambda : self.numbersink.decimal_places == 0,
            self.id_decimal_places_1 : lambda : self.numbersink.decimal_places == 1,
            self.id_decimal_places_2 : lambda : self.numbersink.decimal_places == 2,
            self.id_decimal_places_3 : lambda : self.numbersink.decimal_places == 3,
            self.id_decimal_places_6 : lambda : self.numbersink.decimal_places == 6,
            self.id_decimal_places_9 : lambda : self.numbersink.decimal_places == 9,
            }


def next_up(v, seq):
    """
    Return the first item in seq that is > v.
    """
    for s in seq:
        if s > v:
            return s
    return v

def next_down(v, seq):
    """
    Return the last item in seq that is < v.
    """
    rseq = list(seq[:])
    rseq.reverse()

    for s in rseq:
        if s < v:
            return s
    return v


#========================================================================================
class number_window (plot.PlotCanvas):
    def __init__ (self, numbersink, parent, id = -1,label="number",
                  pos = wx.DefaultPosition, size = wx.DefaultSize,
                  style = wx.DEFAULT_FRAME_STYLE, name = ""):
        plot.PlotCanvas.__init__ (self, parent, id, pos, size, style, name)
        #wx.StaticText.__init__(self, parent, id, label, pos, (size[0]/2,size[1]/2), style, name)
        #print 'parent',parent
        self.static_text=static_text_window( self, numbersink,id, label, pos, (size[0]/2,size[1]/2), style, name)
        gauge_style = wx.GA_HORIZONTAL
        vbox=wx.BoxSizer(wx.VERTICAL)
        vbox.Add (self.static_text, 0, wx.EXPAND)
        self.current_value=None
        if numbersink.input_is_real:
          self.gauge=wx.Gauge( self, id, range=1000, pos=(pos[0],pos[1]+size[1]/2),size=(size[0]/2,size[1]/2), style=gauge_style,  name = "gauge")
          vbox.Add (self.gauge, 1, wx.EXPAND)
        else:
          self.gauge=wx.Gauge( self, id, range=1000, pos=(pos[0],pos[1]+size[1]/3),size=(size[0]/2,size[1]/3), style=gauge_style,  name = "gauge")
          #hbox=wx.BoxSizer(wx.HORIZONTAL)
          self.gauge_imag=wx.Gauge( self, id, range=1000, pos=(pos[0],pos[1]+size[1]*2/3),size=(size[0]/2,size[1]/3), style=gauge_style,  name = "gauge_imag")
          vbox.Add (self.gauge, 1, wx.EXPAND)
          vbox.Add (self.gauge_imag, 1, wx.EXPAND)
          #vbox.Add (hbox, 1, wx.EXPAND)
        self.sizer = vbox
        self.SetSizer (self.sizer)
        self.SetAutoLayout (True)
        self.sizer.Fit (self)

        self.label=label
        #self.y_range = None
        self.numbersink = numbersink
        self.peak_hold = False
        self.peak_vals = None

        #self.SetEnableGrid (True)
        # self.SetEnableZoom (True)
        # self.SetBackgroundColour ('black')
        
        #self.build_popup_menu()
        
        EVT_DATA_EVENT (self, self.set_data)
        wx.EVT_CLOSE (self, self.on_close_window)
        #self.Bind(wx.EVT_RIGHT_UP, self.on_right_click)
        #self.Bind(wx.EVT_RIGHT_UP, self.on_right_click)

        self.input_watcher = input_watcher(numbersink.msgq, numbersink.number_size, self)


    def on_close_window (self, event):
        print "number_window:on_close_window"
        self.keep_running = False

    def set_show_gauge(self, enable):
        self.show_gauge = enable
        if enable:
          self.gauge.Show()
          if not self.numbersink.input_is_real:
            self.gauge_imag.Show()
          #print 'show'
        else:
          self.gauge.Hide()
          if not self.numbersink.input_is_real:
            self.gauge_imag.Hide()
          #print 'hide'

    def set_data (self, evt):
        numbers = evt.data
        L = len (numbers)

        if self.peak_hold:
            if self.peak_vals is None:
                self.peak_vals = numbers
            else:
                self.peak_vals = numpy.maximum(numbers, self.peak_vals)
                numbers = self.peak_vals

        if self.numbersink.input_is_real:
            real_value=numbers[0]*self.numbersink.factor + self.numbersink.base_value
            imag_value=0.0
            self.current_value=real_value
        else:
            real_value=numbers[0]*self.numbersink.factor + self.numbersink.base_value
            imag_value=numbers[1]*self.numbersink.factor + self.numbersink.base_value
            self.current_value=complex(real_value,imag_value)
        #x = max(abs(self.numbersink.sample_rate), abs(self.numbersink.base_value))
        x = max(real_value, imag_value)
        if x >= 1e9:
            sf = 1e-9
            unit_prefix = "G"
        elif x >= 1e6:
            sf = 1e-6
            unit_prefix = "M"
        elif x>= 1e3:
            sf = 1e-3
            unit_prefix = "k"
        else :
            sf = 1
            unit_prefix = ""
        #self.update_y_range ()
        if self.numbersink.input_is_real:
          showtext = "%s: %.*f %s%s" % (self.label, self.numbersink.decimal_places,real_value*sf,unit_prefix,self.numbersink.unit)
        else:
          showtext = "%s: %.*f,%.*f %s%s" % (self.label, self.numbersink.decimal_places,real_value*sf,
                                                       self.numbersink.decimal_places,imag_value*sf,unit_prefix,self.numbersink.unit)
        self.static_text.SetLabel(showtext)
        #print (int(float((real_value-self.numbersink.base_value)*1000.0/(self.numbersink.maxval-self.numbersink.minval)))+500)
        self.gauge.SetValue(int(float((real_value-self.numbersink.base_value)*1000.0/(self.numbersink.maxval-self.numbersink.minval)))+500)
        if not self.numbersink.input_is_real:
          self.gauge.SetValue(int(float((imag_value-self.numbersink.base_value)*1000.0/(self.numbersink.maxval-self.numbersink.minval)))+500)

    def set_peak_hold(self, enable):
        self.peak_hold = enable
        self.peak_vals = None

    def update_y_range (self):
        ymax = self.numbersink.ref_level
        ymin = self.numbersink.ref_level - self.numbersink.decimal_places * self.numbersink.y_divs
        self.y_range = self._axisInterval ('min', ymin, ymax)

    def on_average(self, evt):
        # print "on_average"
        self.numbersink.set_average(evt.IsChecked())

    def on_peak_hold(self, evt):
        # print "on_peak_hold"
        self.numbersink.set_peak_hold(evt.IsChecked())










# ----------------------------------------------------------------
#          	      Deprecated interfaces
# ----------------------------------------------------------------

# returns (block, win).
#   block requires a single input stream of float
#   win is a subclass of wxWindow

def make_number_sink_f(fg, parent, label, number_size, input_rate, ymin = 0, ymax=50):
    
    block = number_sink_f(fg, parent, label=label, number_size=number_size, sample_rate=input_rate,
                       decimal_places=(ymax - ymin)/8, ref_level=ymax)
    return (block, block.win)

# returns (block, win).
#   block requires a single input stream of gr_complex
#   win is a subclass of wxWindow

def make_number_sink_c(fg, parent, label, number_size, input_rate, ymin=0, ymax=50):
    block = number_sink_c(fg, parent, label=label, number_size=number_size, sample_rate=input_rate,
                       decimal_places=(ymax - ymin)/8, ref_level=ymax)
    return (block, block.win)


# ----------------------------------------------------------------
# Standalone test app
# ----------------------------------------------------------------

class test_app_flow_graph (stdgui.gui_flow_graph):
    def __init__(self, frame, panel, vbox, argv):
        stdgui.gui_flow_graph.__init__ (self, frame, panel, vbox, argv)

        #number_size = 256

        # build our flow graph
        input_rate = 20.48e3

        # Generate a complex sinusoid
        src1 = gr.sig_source_c (input_rate, gr.GR_SIN_WAVE, 2e3, 1)
        #src1 = gr.sig_source_c (input_rate, gr.GR_CONST_WAVE, 5.75e3, 1)

        # We add these throttle blocks so that this demo doesn't
        # suck down all the CPU available.  Normally you wouldn't use these.
        thr1 = gr.throttle(gr.sizeof_gr_complex, input_rate)

        #sink1 = number_sink_c (self, panel, label="Complex Data", number_size=number_size,
        #                    sample_rate=input_rate, base_value=100e3,
        #                    ref_level=0, decimal_places=3)
        #vbox.Add (sink1.win, 1, wx.EXPAND)
        #self.connect (src1, thr1, sink1)

        src2 = gr.sig_source_f (input_rate, gr.GR_SIN_WAVE, 2e3, 1)
        #src2 = gr.sig_source_f (input_rate, gr.GR_CONST_WAVE, 5.75e3, 1)
        thr2 = gr.throttle(gr.sizeof_float, input_rate)
        sink2 = number_sink_f (self, panel, unit='Hz',label="Real Data", avg_alpha=0.001,#number_size=number_size*2,
                            sample_rate=input_rate, base_value=100e3,
                            ref_level=0, decimal_places=3)
        vbox.Add (sink2.win, 1, wx.EXPAND)
        sink3 = number_sink_c (self, panel, unit='V',label="Complex Data", avg_alpha=0.001,#number_size=number_size*2,
                            sample_rate=input_rate, base_value=0,
                            ref_level=0, decimal_places=3)
        vbox.Add (sink3.win, 1, wx.EXPAND)
        self.connect (src2, thr2, sink2)
        self.connect (src1, thr1, sink3)
def main ():
    app = stdgui.stdapp (test_app_flow_graph,
                         "Number Sink Test App")
    app.MainLoop ()

if __name__ == '__main__':
    main ()