def __init__(self, parent=None):
super().__init__(parent)
self.setObjectName("Levels_Widget")
self.gridLayout = QtWidgets.QGridLayout(self)
self.gridLayout.setObjectName("gridLayout")
font = QtGui.QFont()
font.setPointSize(14)
font.setWeight(75)
font.setBold(True)
self.label_peak = QtWidgets.QLabel(self)
self.label_peak.setFont(font)
# QtCore.Qt.AlignBottom|QtCore.Qt.AlignLeading|QtCore.Qt.AlignLeft
self.label_peak.setAlignment(QtCore.Qt.AlignBottom
| QtCore.Qt.AlignRight)
self.label_peak.setObjectName("label_peak")
self.label_peak_legend = QtWidgets.QLabel(self)
self.label_peak_legend.setAlignment(QtCore.Qt.AlignTop
| QtCore.Qt.AlignRight)
self.label_peak_legend.setObjectName("label_peak_legend")
self.label_rms = QtWidgets.QLabel(self)
self.label_rms.setFont(font)
self.label_rms.setAlignment(QtCore.Qt.AlignBottom
| QtCore.Qt.AlignRight)
self.label_rms.setObjectName("label_rms")
self.label_rms_legend = QtWidgets.QLabel(self)
self.label_rms_legend.setAlignment(QtCore.Qt.AlignTop
| QtCore.Qt.AlignRight)
self.label_rms_legend.setObjectName("label_rms_legend")
self.meter = qsynthMeter(self)
self.meter.setStyleSheet(STYLESHEET)
self.meter.setObjectName("meter")
self.gridLayout.addWidget(self.label_peak, 0, 0, 1, 1)
self.gridLayout.addWidget(self.label_peak_legend, 1, 0, 1, 1)
self.gridLayout.addWidget(self.label_rms, 2, 0, 1, 1)
self.gridLayout.addWidget(self.label_rms_legend, 3, 0, 1, 1)
self.gridLayout.addWidget(self.meter, 4, 0, 1, 1)
self.label_rms.setText("+00.0")
self.label_peak.setText("+00.0")
self.label_rms_legend.setText("dB FS\n RMS")
self.label_peak_legend.setText("dB FS\n Peak")
self.label_rms.setTextFormat(QtCore.Qt.PlainText)
self.label_peak.setTextFormat(QtCore.Qt.PlainText)
# self.label_rms.setSizePolicy(QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding))
# self.label_rms_legend.setSizePolicy(QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding))
# self.label_peak.setSizePolicy(QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding))
# self.label_peak_legend.setSizePolicy(QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding))
self.audiobuffer = None
# initialize the settings dialog
self.settings_dialog = Levels_Settings_Dialog(self)
# initialize the class instance that will do the fft
self.proc = audioproc()
# time = SMOOTH_DISPLAY_TIMER_PERIOD_MS/1000. #DISPLAY
# time = 0.025 #IMPULSE setting for a sound level meter
# time = 0.125 #FAST setting for a sound level meter
# time = 1. #SLOW setting for a sound level meter
self.response_time = 0.300 # 300ms is a common value for VU meters
# an exponential smoothing filter is a simple IIR filter
# s_i = alpha*x_i + (1-alpha)*s_{i-1}
# we compute alpha so that the n most recent samples represent 100*w percent of the output
w = 0.65
n = self.response_time * SAMPLING_RATE
N = 5 * n
self.alpha = 1. - (1. - w)**(1. / (n + 1))
self.kernel = (1. - self.alpha)**(np.arange(0, N)[::-1])
# first channel
self.level_rms = -30.
self.level_max = -30.
self.old_rms = 1e-30
self.old_max = 1e-30
# second channel
self.level_rms_2 = -30.
self.level_max_2 = -30.
self.old_rms_2 = 1e-30
self.old_max_2 = 1e-30
response_time_peaks = 0.025 # 25ms for instantaneous peaks
n2 = response_time_peaks / (SMOOTH_DISPLAY_TIMER_PERIOD_MS / 1000.)
self.alpha2 = 1. - (1. - w)**(1. / (n2 + 1))
self.two_channels = False
self.i = 0
def __init__(self, parent=None, logger=None):
QtGui.QWidget.__init__(self, parent)
self.setObjectName("Levels_Widget")
self.gridLayout = QtGui.QGridLayout(self)
self.gridLayout.setObjectName("gridLayout")
self.label_rms = QtGui.QLabel(self)
font = QtGui.QFont()
font.setPointSize(14)
font.setWeight(75)
font.setBold(True)
self.label_rms.setFont(font)
self.label_rms.setAlignment(QtCore.Qt.AlignBottom
| QtCore.Qt.AlignRight
| QtCore.Qt.AlignTrailing)
self.label_rms.setObjectName("label_rms")
self.gridLayout.addWidget(self.label_rms, 0, 0, 1, 1)
self.meter = qsynthMeter(self)
self.meter.setStyleSheet(STYLESHEET)
self.meter.setObjectName("meter")
self.gridLayout.addWidget(self.meter, 0, 1, 2, 1)
self.label_peak = QtGui.QLabel(self)
self.label_peak.setFont(font)
self.label_peak.setAlignment(QtCore.Qt.AlignBottom
| QtCore.Qt.AlignLeading
| QtCore.Qt.AlignLeft)
self.label_peak.setObjectName("label_peak")
self.gridLayout.addWidget(self.label_peak, 0, 2, 1, 1)
self.label_rms_legend = QtGui.QLabel(self)
self.label_rms_legend.setAlignment(QtCore.Qt.AlignRight
| QtCore.Qt.AlignTop
| QtCore.Qt.AlignTrailing)
self.label_rms_legend.setObjectName("label_rms_legend")
self.gridLayout.addWidget(self.label_rms_legend, 1, 0, 1, 1)
self.label_peak_legend = QtGui.QLabel(self)
self.label_peak_legend.setAlignment(QtCore.Qt.AlignLeading
| QtCore.Qt.AlignLeft
| QtCore.Qt.AlignTop)
self.label_peak_legend.setObjectName("label_peak_legend")
self.gridLayout.addWidget(self.label_peak_legend, 1, 2, 1, 1)
self.label_rms.setText("-100.0")
self.label_peak.setText("-100.0")
self.label_rms_legend.setText("dBFS\n RMS")
self.label_peak_legend.setText("dBFS\n peak")
#self.label_rms.setSizePolicy(QtGui.QSizePolicy(QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding))
#self.label_rms_legend.setSizePolicy(QtGui.QSizePolicy(QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding))
#self.label_peak.setSizePolicy(QtGui.QSizePolicy(QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding))
#self.label_peak_legend.setSizePolicy(QtGui.QSizePolicy(QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding))
# store the logger instance
if logger is None:
self.logger = parent.parent.logger
else:
self.logger = logger
self.audiobuffer = None
# initialize the settings dialog
self.settings_dialog = Levels_Settings_Dialog(self, self.logger)
# initialize the class instance that will do the fft
self.proc = audioproc(self.logger)
#time = SMOOTH_DISPLAY_TIMER_PERIOD_MS/1000. #DISPLAY
#time = 0.025 #IMPULSE setting for a sound level meter
#time = 0.125 #FAST setting for a sound level meter
#time = 1. #SLOW setting for a sound level meter
self.response_time = 0.125
# an exponential smoothing filter is a simple IIR filter
# s_i = alpha*x_i + (1-alpha)*s_{i-1}
#we compute alpha so that the n most recent samples represent 100*w percent of the output
w = 0.65
n = self.response_time * SAMPLING_RATE
N = 4096
self.alpha = 1. - (1. - w)**(1. / (n + 1))
self.kernel = (1. - self.alpha)**(arange(0, N)[::-1])
# first channel
self.old_rms = 1e-30
self.old_max = 1e-30
# second channel
self.old_rms_2 = 1e-30
self.old_max_2 = 1e-30
n2 = self.response_time / (SMOOTH_DISPLAY_TIMER_PERIOD_MS / 1000.)
self.alpha2 = 1. - (1. - w)**(1. / (n2 + 1))
self.two_channels = False