Beispiel #1
0
class Scope_Widget(QtGui.QWidget):
    def __init__(self, parent = None, logger = None):
        QtGui.QWidget.__init__(self, parent)

        self.audiobuffer = None
        
        # store the logger instance
        if logger is None:
            self.logger = parent.parent.logger
        else:
            self.logger = logger
        
        self.setObjectName("Scope_Widget")
        self.gridLayout = QtGui.QGridLayout(self)
        self.gridLayout.setObjectName("gridLayout")
        self.PlotZoneUp = TimePlot(self, self.logger)
        self.PlotZoneUp.setObjectName("PlotZoneUp")
        self.gridLayout.addWidget(self.PlotZoneUp, 0, 0, 1, 1)
        
        self.setStyleSheet(STYLESHEET)

        self.settings_dialog = Scope_Settings_Dialog(self, self.logger)

    # method
    def set_buffer(self, buffer):
        self.audiobuffer = buffer

    # method
    def update(self):
        if not self.isVisible():
            return

        time = 2*SMOOTH_DISPLAY_TIMER_PERIOD_MS/1000.
        width = time*SAMPLING_RATE
        #basic trigger capability on leading edge
        floatdata = self.audiobuffer.data(2*width)

        #number of data points received at the last audio buffer update
        #newpoints = self.audiobuffer.newpoints
        #print newpoints

        # because of the buffering, sometimes we have not got any data
        #if newpoints==0:
        #    return
        
        #floatdata = self.audiobuffer.data(newpoints + width)

        twoChannels = False
        if floatdata.shape[0] > 1:
            twoChannels = True

        # trigger on the first channel only
        triggerdata = floatdata[0,:]
        # trigger on half of the waveform
        trig_search_start = width/2
        trig_search_stop = -width/2
        triggerdata = triggerdata[trig_search_start : trig_search_stop]

        max = floatdata.max()
        trigger_level = max*2./3.
        #trigger_level = 0.6
        trigger_pos = where((triggerdata[:-1] < trigger_level)*(triggerdata[1:] >= trigger_level))[0]

        if len(trigger_pos)==0:
            return
        
        if len(trigger_pos) > 0:
            shift = trigger_pos[0]
        else:
            #return
            shift = 0
        shift += trig_search_start
        datarange = width
        floatdata = floatdata[:, shift -  datarange/2: shift +  datarange/2]
 
        y = floatdata[0,:] #- floatdata.mean()
        if twoChannels:
            y2 = floatdata[1,:] #- floatdata.mean()
        
        dBscope = False
        if dBscope:
            dBmin = -50.
            y = sign(y)*(20*log10(abs(y))).clip(dBmin, 0.)/(-dBmin) + sign(y)*1.
            if twoChannels:
                y2 = sign(y2)*(20*log10(abs(y2))).clip(dBmin, 0.)/(-dBmin) + sign(y2)*1.
    
        time = (arange(len(y)) - datarange/2)/float(SAMPLING_RATE)
        
        if twoChannels:
            self.PlotZoneUp.setdataTwoChannels(time, y, y2)
        else:
            self.PlotZoneUp.setdata(time, y)

    # slot
    def settings_called(self, checked):
        self.settings_dialog.show()

    # method
    def saveState(self, settings):
        self.settings_dialog.saveState(settings)
    
    # method
    def restoreState(self, settings):
        self.settings_dialog.restoreState(settings)
Beispiel #2
0
class Scope_Widget(QtGui.QWidget):
	def __init__(self, parent = None, logger = None):
		QtGui.QWidget.__init__(self, parent)

		self.audiobuffer = None
		
		# store the logger instance
		if logger is None:
		    self.logger = parent.parent.logger
		else:
		    self.logger = logger
		
		self.setObjectName("Scope_Widget")
		self.gridLayout = QtGui.QGridLayout(self)
		self.gridLayout.setObjectName("gridLayout")
		self.PlotZoneUp = TimePlot(self, self.logger)
		self.PlotZoneUp.setObjectName("PlotZoneUp")
		self.gridLayout.addWidget(self.PlotZoneUp, 0, 0, 1, 1)
		
		self.setStyleSheet(STYLESHEET)

		self.settings_dialog = Scope_Settings_Dialog(self, self.logger)

	# method
	def set_buffer(self, buffer):
		self.audiobuffer = buffer

	# method
	def update(self):
		if not self.isVisible():
			return

		time = SMOOTH_DISPLAY_TIMER_PERIOD_MS/1000.
		#basic trigger capability on leading edge
		floatdata = self.audiobuffer.data(time*SAMPLING_RATE)

		twoChannels = False
		if floatdata.shape[0] > 1:
			twoChannels = True

		# trigger on the first channel only
		floatdata = floatdata[0,:]

		max = floatdata.max()
		trigger_level = max*2./3.
		trigger_pos = where((floatdata[:-1] < trigger_level)*(floatdata[1:] >= trigger_level))[0]
		if len(trigger_pos) > 0:
			shift = time*SAMPLING_RATE - trigger_pos[0]
		else:
			shift = 0
		floatdata = self.audiobuffer.data(time*SAMPLING_RATE + shift)
		floatdata = floatdata[:, 0 : time*SAMPLING_RATE]
  
		y = floatdata[0,::-1] #- floatdata.mean()
 		if twoChannels:
			y2 = floatdata[1,::-1] #- floatdata.mean()
		
		dBscope = False
		if dBscope:
		    dBmin = -50.
		    y = sign(y)*(20*log10(abs(y))).clip(dBmin, 0.)/(-dBmin) + sign(y)*1.
 		    if twoChannels:
			 y2 = sign(y2)*(20*log10(abs(y2))).clip(dBmin, 0.)/(-dBmin) + sign(y2)*1.
	
		time = linspace(0., len(y)/float(SAMPLING_RATE), len(y))
		
 		if twoChannels:
			self.PlotZoneUp.setdataTwoChannels(time, y, y2)
 		else:
			self.PlotZoneUp.setdata(time, y)

	# slot
	def settings_called(self, checked):
		self.settings_dialog.show()

	# method
	def saveState(self, settings):
		self.settings_dialog.saveState(settings)
	
	# method
	def restoreState(self, settings):
		self.settings_dialog.restoreState(settings)