#!/usr/bin/python
# Copyright 2015 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

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

from distutils.version import StrictVersion
class bandpass_recorder_gui(gr.top_block, Qt.QWidget):

    def __init__(self):
        gr.top_block.__init__(self, "Bandpass Recorder Gui")
        Qt.QWidget.__init__(self)
        self.setWindowTitle("Bandpass Recorder Gui")
        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", "bandpass_recorder_gui")
        self.restoreGeometry(self.settings.value("geometry").toByteArray())


        ##################################################
        # Variables
        ##################################################
        self.width = width = 3e6
        self.samp_rate = samp_rate = 30e6
        self.record_time = record_time = 100
        self.gain = gain = 50
        self.freq = freq = 20e3

        ##################################################
        # Blocks
        ##################################################
        self._width_range = Range(1, samp_rate, 1, 3e6, 200)
        self._width_win = RangeWidget(self._width_range, self.set_width, "width", "counter_slider")
        self.top_layout.addWidget(self._width_win)
        self._gain_range = Range(0, 150, 1, 50, 200)
        self._gain_win = RangeWidget(self._gain_range, self.set_gain, "gain", "counter_slider")
        self.top_layout.addWidget(self._gain_win)
        self._freq_range = Range(0, 6e9, 10000, 20e3, 200)
        self._freq_win = RangeWidget(self._freq_range, self.set_freq, "Frequency", "counter_slider")
        self.top_layout.addWidget(self._freq_win)
        self.uhd_usrp_source_0 = uhd.usrp_source(
        	",".join(("", "")),
        	uhd.stream_args(
        		cpu_format="fc32",
        		otw_format="sc16",
        		channels=range(1),
        	),
        )
        self.uhd_usrp_source_0.set_samp_rate(samp_rate)
        self.uhd_usrp_source_0.set_center_freq(freq, 0)
        self.uhd_usrp_source_0.set_gain(gain, 0)
        self.uhd_usrp_source_0.set_antenna('TX/RX', 0)
        self.uhd_usrp_source_0.set_bandwidth(width, 0)
        self._record_time_range = Range(0, 60e3, 1, 100, 200)
        self._record_time_win = RangeWidget(self._record_time_range, self.set_record_time, "Record Length (ms)", "counter_slider")
        self.top_layout.addWidget(self._record_time_win)
        self.qtgui_sink_x_0 = qtgui.sink_c(
        	1024, #fftsize
        	firdes.WIN_BLACKMAN_hARRIS, #wintype
        	0, #fc
        	samp_rate/2, #bw
        	"", #name
        	True, #plotfreq
        	True, #plotwaterfall
        	True, #plottime
        	True, #plotconst
        )
        self.qtgui_sink_x_0.set_update_time(1.0/10)
        self._qtgui_sink_x_0_win = sip.wrapinstance(self.qtgui_sink_x_0.pyqwidget(), Qt.QWidget)
        self.top_layout.addWidget(self._qtgui_sink_x_0_win)

        self.qtgui_sink_x_0.enable_rf_freq(False)


        ##################################################
        # Connections
        ##################################################
        self.connect((self.uhd_usrp_source_0, 0), (self.qtgui_sink_x_0, 0))

    def closeEvent(self, event):
        self.settings = Qt.QSettings("GNU Radio", "bandpass_recorder_gui")
        self.settings.setValue("geometry", self.saveGeometry())
        event.accept()

    def get_width(self):
        return self.width

    def set_width(self, width):
        self.width = width
        self.uhd_usrp_source_0.set_bandwidth(self.width, 0)

    def get_samp_rate(self):
        return self.samp_rate

    def set_samp_rate(self, samp_rate):
        self.samp_rate = samp_rate
        self.qtgui_sink_x_0.set_frequency_range(0, self.samp_rate/2)
        self.uhd_usrp_source_0.set_samp_rate(self.samp_rate)

    def get_record_time(self):
        return self.record_time

    def set_record_time(self, record_time):
        self.record_time = record_time

    def get_gain(self):
        return self.gain

    def set_gain(self, gain):
        self.gain = gain
        self.uhd_usrp_source_0.set_gain(self.gain, 0)

    def get_freq(self):
        return self.freq

    def set_freq(self, freq):
        self.freq = freq
        self.uhd_usrp_source_0.set_center_freq(self.freq, 0)


if __name__ == '__main__':
    parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
    (options, args) = parser.parse_args()
    if(StrictVersion(Qt.qVersion()) >= StrictVersion("4.5.0")):
        Qt.QApplication.setGraphicsSystem(gr.prefs().get_string('qtgui','style','raster'))
    qapp = Qt.QApplication(sys.argv)
    tb = bandpass_recorder_gui()
    tb.start()
    tb.show()
    def quitting():
        tb.stop()
        tb.wait()
    qapp.connect(qapp, Qt.SIGNAL("aboutToQuit()"), quitting)
    qapp.exec_()
    tb = None #to clean up Qt widgets