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THD_analyser.py
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THD_analyser.py
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#!/usr/bin/env python2
# -*- coding: utf-8 -*-
##################################################
# GNU Radio Python Flow Graph
# Title: THD Analyser
# Author: Jenny List
# Description: A simple single-frequency THD analyser for audio work
# Generated: Sun Mar 29 17:25:52 2020
##################################################
from distutils.version import StrictVersion
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 PyQt5 import Qt
from PyQt5 import Qt, QtCore
from gnuradio import analog
from gnuradio import audio
from gnuradio import blocks
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 optparse import OptionParser
import sip
import sys
from gnuradio import qtgui
class THD_analyser(gr.top_block, Qt.QWidget):
def __init__(self):
gr.top_block.__init__(self, "THD Analyser")
Qt.QWidget.__init__(self)
self.setWindowTitle("THD Analyser")
qtgui.util.check_set_qss()
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", "THD_analyser")
self.restoreGeometry(self.settings.value("geometry", type=QtCore.QByteArray))
##################################################
# Variables
##################################################
self.frequency = frequency = 1000
self.cut_off = cut_off = frequency/10
self.transition_width = transition_width = cut_off/10
self.samp_rate = samp_rate = 44100
##################################################
# Blocks
##################################################
self.qtgui_number_sink_0 = qtgui.number_sink(
gr.sizeof_float,
0,
qtgui.NUM_GRAPH_HORIZ,
1
)
self.qtgui_number_sink_0.set_update_time(0.10)
self.qtgui_number_sink_0.set_title("")
labels = ['', '', '', '', '',
'', '', '', '', '']
units = ['', '', '', '', '',
'', '', '', '', '']
colors = [("black", "black"), ("black", "black"), ("black", "black"), ("black", "black"), ("black", "black"),
("black", "black"), ("black", "black"), ("black", "black"), ("black", "black"), ("black", "black")]
factor = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
for i in xrange(1):
self.qtgui_number_sink_0.set_min(i, -1)
self.qtgui_number_sink_0.set_max(i, 1)
self.qtgui_number_sink_0.set_color(i, colors[i][0], colors[i][1])
if len(labels[i]) == 0:
self.qtgui_number_sink_0.set_label(i, "Data {0}".format(i))
else:
self.qtgui_number_sink_0.set_label(i, labels[i])
self.qtgui_number_sink_0.set_unit(i, units[i])
self.qtgui_number_sink_0.set_factor(i, factor[i])
self.qtgui_number_sink_0.enable_autoscale(False)
self._qtgui_number_sink_0_win = sip.wrapinstance(self.qtgui_number_sink_0.pyqwidget(), Qt.QWidget)
self.top_grid_layout.addWidget(self._qtgui_number_sink_0_win)
self.low_pass_filter_0 = filter.fir_filter_fff(1, firdes.low_pass(
1, samp_rate, frequency+cut_off-transition_width, transition_width, firdes.WIN_BLACKMAN, 6.76))
self.high_pass_filter_0 = filter.fir_filter_fff(1, firdes.high_pass(
1, samp_rate, frequency+cut_off+(transition_width*1.1), transition_width, firdes.WIN_BLACKMAN, 6.76))
self.dc_blocker_xx_0_0 = filter.dc_blocker_ff(32, True)
self.dc_blocker_xx_0 = filter.dc_blocker_ff(32, True)
self.blocks_rms_xx_0_0 = blocks.rms_ff(0.0001)
self.blocks_rms_xx_0 = blocks.rms_ff(0.0001)
self.blocks_null_source_0 = blocks.null_source(gr.sizeof_float*1)
self.blocks_null_sink_0 = blocks.null_sink(gr.sizeof_float*1)
self.blocks_multiply_const_vxx_0 = blocks.multiply_const_vff((100, ))
self.blocks_divide_xx_0 = blocks.divide_ff(1)
self.audio_source_0 = audio.source(samp_rate, '', True)
self.audio_sink_0 = audio.sink(samp_rate, '', True)
self.analog_sig_source_x_0 = analog.sig_source_f(samp_rate, analog.GR_SIN_WAVE, frequency, 0.5, 0)
##################################################
# Connections
##################################################
self.connect((self.analog_sig_source_x_0, 0), (self.audio_sink_0, 1))
self.connect((self.audio_source_0, 1), (self.blocks_null_sink_0, 0))
self.connect((self.audio_source_0, 0), (self.high_pass_filter_0, 0))
self.connect((self.audio_source_0, 0), (self.low_pass_filter_0, 0))
self.connect((self.blocks_divide_xx_0, 0), (self.blocks_multiply_const_vxx_0, 0))
self.connect((self.blocks_multiply_const_vxx_0, 0), (self.qtgui_number_sink_0, 0))
self.connect((self.blocks_null_source_0, 0), (self.audio_sink_0, 0))
self.connect((self.blocks_rms_xx_0, 0), (self.blocks_divide_xx_0, 1))
self.connect((self.blocks_rms_xx_0_0, 0), (self.blocks_divide_xx_0, 0))
self.connect((self.dc_blocker_xx_0, 0), (self.blocks_rms_xx_0_0, 0))
self.connect((self.dc_blocker_xx_0_0, 0), (self.blocks_rms_xx_0, 0))
self.connect((self.high_pass_filter_0, 0), (self.dc_blocker_xx_0, 0))
self.connect((self.low_pass_filter_0, 0), (self.dc_blocker_xx_0_0, 0))
def closeEvent(self, event):
self.settings = Qt.QSettings("GNU Radio", "THD_analyser")
self.settings.setValue("geometry", self.saveGeometry())
event.accept()
def get_frequency(self):
return self.frequency
def set_frequency(self, frequency):
self.frequency = frequency
self.set_cut_off(self.frequency/10)
self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate, self.frequency+self.cut_off-self.transition_width, self.transition_width, firdes.WIN_BLACKMAN, 6.76))
self.high_pass_filter_0.set_taps(firdes.high_pass(1, self.samp_rate, self.frequency+self.cut_off+(self.transition_width*1.1), self.transition_width, firdes.WIN_BLACKMAN, 6.76))
self.analog_sig_source_x_0.set_frequency(self.frequency)
def get_cut_off(self):
return self.cut_off
def set_cut_off(self, cut_off):
self.cut_off = cut_off
self.set_transition_width(self.cut_off/10)
self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate, self.frequency+self.cut_off-self.transition_width, self.transition_width, firdes.WIN_BLACKMAN, 6.76))
self.high_pass_filter_0.set_taps(firdes.high_pass(1, self.samp_rate, self.frequency+self.cut_off+(self.transition_width*1.1), self.transition_width, firdes.WIN_BLACKMAN, 6.76))
def get_transition_width(self):
return self.transition_width
def set_transition_width(self, transition_width):
self.transition_width = transition_width
self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate, self.frequency+self.cut_off-self.transition_width, self.transition_width, firdes.WIN_BLACKMAN, 6.76))
self.high_pass_filter_0.set_taps(firdes.high_pass(1, self.samp_rate, self.frequency+self.cut_off+(self.transition_width*1.1), self.transition_width, firdes.WIN_BLACKMAN, 6.76))
def get_samp_rate(self):
return self.samp_rate
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate, self.frequency+self.cut_off-self.transition_width, self.transition_width, firdes.WIN_BLACKMAN, 6.76))
self.high_pass_filter_0.set_taps(firdes.high_pass(1, self.samp_rate, self.frequency+self.cut_off+(self.transition_width*1.1), self.transition_width, firdes.WIN_BLACKMAN, 6.76))
self.analog_sig_source_x_0.set_sampling_freq(self.samp_rate)
def main(top_block_cls=THD_analyser, options=None):
qapp = Qt.QApplication(sys.argv)
tb = top_block_cls()
tb.start()
tb.show()
def quitting():
tb.stop()
tb.wait()
qapp.aboutToQuit.connect(quitting)
qapp.exec_()
if __name__ == '__main__':
main()