#!/usr/bin/env python2
  # -*- coding: utf-8 -*-
  ##################################################
  # GNU Radio Python Flow Graph

  # Title: Fm Radio Comp Decim Lpf
  # Generated: Sat Mar 18 09:58:42 2017

  ##################################################
  
  if __name__ == '__main__':
      import ctypes
      import sys
      if sys.platform.startswith('linux'):
          try:
              x11 = ctypes.cdll.LoadLibrary('libX11.so')
              x11.XInitThreads()
          except:
              print "Warning: failed to XInitThreads()"
  
  from PyQt4 import Qt
  from gnuradio import analog

  from gnuradio import audio

  from gnuradio import eng_notation
  from gnuradio import filter
  from gnuradio import gr
  from gnuradio import qtgui
  from gnuradio.eng_option import eng_option
  from gnuradio.filter import firdes
  from gnuradio.qtgui import Range, RangeWidget
  from optparse import OptionParser
  import osmosdr
  import sip
  import sys
  import time

  class fm_radio_comp_decim_lpf(gr.top_block, Qt.QWidget):

  
      def __init__(self):

          gr.top_block.__init__(self, "Fm Radio Comp Decim Lpf")

          Qt.QWidget.__init__(self)

          self.setWindowTitle("Fm Radio Comp Decim Lpf")

          try:
              self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
          except:
              pass
          self.top_scroll_layout = Qt.QVBoxLayout()
          self.setLayout(self.top_scroll_layout)
          self.top_scroll = Qt.QScrollArea()
          self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
          self.top_scroll_layout.addWidget(self.top_scroll)
          self.top_scroll.setWidgetResizable(True)
          self.top_widget = Qt.QWidget()
          self.top_scroll.setWidget(self.top_widget)
          self.top_layout = Qt.QVBoxLayout(self.top_widget)
          self.top_grid_layout = Qt.QGridLayout()
          self.top_layout.addLayout(self.top_grid_layout)

          self.settings = Qt.QSettings("GNU Radio", "fm_radio_comp_decim_lpf")

          self.restoreGeometry(self.settings.value("geometry").toByteArray())
  
          ##################################################
          # Variables
          ##################################################
          self.samp_rate = samp_rate = 48e3

          self.freq = freq = 91e6

  
          ##################################################
          # Blocks
          ##################################################

          self._freq_range = Range(1e6, 2e9, 1e5, 91e6, 200)

          self._freq_win = RangeWidget(self._freq_range, self.set_freq, "freq", "counter_slider", float)
          self.top_grid_layout.addWidget(self._freq_win, 0,0)
          self.rtlsdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + '' )
          self.rtlsdr_source_0.set_sample_rate(samp_rate*10*4)
          self.rtlsdr_source_0.set_center_freq(freq, 0)
          self.rtlsdr_source_0.set_freq_corr(0, 0)
          self.rtlsdr_source_0.set_dc_offset_mode(0, 0)
          self.rtlsdr_source_0.set_iq_balance_mode(0, 0)
          self.rtlsdr_source_0.set_gain_mode(False, 0)
          self.rtlsdr_source_0.set_gain(20, 0)
          self.rtlsdr_source_0.set_if_gain(20, 0)
          self.rtlsdr_source_0.set_bb_gain(20, 0)
          self.rtlsdr_source_0.set_antenna('', 0)
          self.rtlsdr_source_0.set_bandwidth(0, 0)
            
          self.rational_resampler_xxx_0_0 = filter.rational_resampler_ccc(
                  interpolation=1,
                  decimation=4,
                  taps=None,
                  fractional_bw=None,
          )
          self.rational_resampler_xxx_0 = filter.rational_resampler_fff(
                  interpolation=1,
                  decimation=10,
                  taps=None,
                  fractional_bw=None,
          )

          self.qtgui_freq_sink_x_0 = qtgui.freq_sink_f(
          	1024, #size
          	firdes.WIN_BLACKMAN_hARRIS, #wintype
          	0, #fc
          	samp_rate, #bw
          	"", #name
          	2 #number of inputs
          )
          self.qtgui_freq_sink_x_0.set_update_time(0.10)
          self.qtgui_freq_sink_x_0.set_y_axis(-140, 10)
          self.qtgui_freq_sink_x_0.set_y_label('Relative Gain', 'dB')
          self.qtgui_freq_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "")
          self.qtgui_freq_sink_x_0.enable_autoscale(False)
          self.qtgui_freq_sink_x_0.enable_grid(True)
          self.qtgui_freq_sink_x_0.set_fft_average(1.0)
          self.qtgui_freq_sink_x_0.enable_axis_labels(True)
          self.qtgui_freq_sink_x_0.enable_control_panel(False)
          
          if not True:
            self.qtgui_freq_sink_x_0.disable_legend()
          
          if "float" == "float" or "float" == "msg_float":
            self.qtgui_freq_sink_x_0.set_plot_pos_half(not True)
          
          labels = ['', '', '', '', '',
                    '', '', '', '', '']
          widths = [1, 1, 1, 1, 1,
                    1, 1, 1, 1, 1]
          colors = ["blue", "red", "green", "black", "cyan",
                    "magenta", "yellow", "dark red", "dark green", "dark blue"]
          alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
                    1.0, 1.0, 1.0, 1.0, 1.0]
          for i in xrange(2):
              if len(labels[i]) == 0:
                  self.qtgui_freq_sink_x_0.set_line_label(i, "Data {0}".format(i))
              else:
                  self.qtgui_freq_sink_x_0.set_line_label(i, labels[i])
              self.qtgui_freq_sink_x_0.set_line_width(i, widths[i])
              self.qtgui_freq_sink_x_0.set_line_color(i, colors[i])
              self.qtgui_freq_sink_x_0.set_line_alpha(i, alphas[i])
          
          self._qtgui_freq_sink_x_0_win = sip.wrapinstance(self.qtgui_freq_sink_x_0.pyqwidget(), Qt.QWidget)
          self.top_grid_layout.addWidget(self._qtgui_freq_sink_x_0_win, 12,0)
          self.low_pass_filter_0_0 = filter.fir_filter_fff(10, firdes.low_pass(

          	1, samp_rate*10, 96e3, 1e3, firdes.WIN_HAMMING, 6.76))

          self.low_pass_filter_0 = filter.fir_filter_ccf(4, firdes.low_pass(

          	1, samp_rate*10*4, 100e3, 1e3, firdes.WIN_HAMMING, 6.76))
          self.audio_sink_0 = audio.sink(int(samp_rate), '', True)

          self.analog_wfm_rcv_0_0 = analog.wfm_rcv(
          	quad_rate=samp_rate*10,
          	audio_decimation=1,
          )

          self.analog_wfm_rcv_0 = analog.wfm_rcv(
          	quad_rate=samp_rate*10,
          	audio_decimation=1,
          )
  
          ##################################################
          # Connections
          ##################################################

          self.connect((self.analog_wfm_rcv_0, 0), (self.rational_resampler_xxx_0, 0))    

          self.connect((self.analog_wfm_rcv_0_0, 0), (self.low_pass_filter_0_0, 0))    
          self.connect((self.low_pass_filter_0, 0), (self.analog_wfm_rcv_0_0, 0))    
          self.connect((self.low_pass_filter_0_0, 0), (self.qtgui_freq_sink_x_0, 1))    

          self.connect((self.rational_resampler_xxx_0, 0), (self.audio_sink_0, 0))    

          self.connect((self.rational_resampler_xxx_0, 0), (self.qtgui_freq_sink_x_0, 0))    

          self.connect((self.rational_resampler_xxx_0_0, 0), (self.analog_wfm_rcv_0, 0))    

          self.connect((self.rtlsdr_source_0, 0), (self.low_pass_filter_0, 0))    

          self.connect((self.rtlsdr_source_0, 0), (self.rational_resampler_xxx_0_0, 0))    
  
      def closeEvent(self, event):

          self.settings = Qt.QSettings("GNU Radio", "fm_radio_comp_decim_lpf")

          self.settings.setValue("geometry", self.saveGeometry())
          event.accept()
  
      def get_samp_rate(self):
          return self.samp_rate
  
      def set_samp_rate(self, samp_rate):
          self.samp_rate = samp_rate
          self.rtlsdr_source_0.set_sample_rate(self.samp_rate*10*4)

          self.qtgui_freq_sink_x_0.set_frequency_range(0, self.samp_rate)

          self.low_pass_filter_0_0.set_taps(firdes.low_pass(1, self.samp_rate*10, 96e3, 1e3, firdes.WIN_HAMMING, 6.76))
          self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate*10*4, 100e3, 1e3, firdes.WIN_HAMMING, 6.76))

  
      def get_freq(self):
          return self.freq
  
      def set_freq(self, freq):
          self.freq = freq
          self.rtlsdr_source_0.set_center_freq(self.freq, 0)

  def main(top_block_cls=fm_radio_comp_decim_lpf, options=None):

  
      from distutils.version import StrictVersion
      if StrictVersion(Qt.qVersion()) >= StrictVersion("4.5.0"):
          style = gr.prefs().get_string('qtgui', 'style', 'raster')
          Qt.QApplication.setGraphicsSystem(style)
      qapp = Qt.QApplication(sys.argv)
  
      tb = top_block_cls()
      tb.start()
      tb.show()
  
      def quitting():
          tb.stop()
          tb.wait()
      qapp.connect(qapp, Qt.SIGNAL("aboutToQuit()"), quitting)
      qapp.exec_()
  
  
  if __name__ == '__main__':
      main()