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
class Levels_Widget(QtWidgets.QWidget):
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
# method
def set_buffer(self, buffer):
self.audiobuffer = buffer
def handle_new_data(self, floatdata):
if floatdata.shape[0] > 1 and not self.two_channels:
self.meter.setPortCount(2)
self.two_channels = True
elif floatdata.shape[0] == 1 and self.two_channels:
self.meter.setPortCount(1)
self.two_channels = False
# first channel
y1 = floatdata[0, :]
# exponential smoothing for max
if len(y1) > 0:
value_max = np.abs(y1).max()
if value_max > self.old_max * (1. - self.alpha2):
self.old_max = value_max
else:
# exponential decrease
self.old_max *= (1. - self.alpha2)
# exponential smoothing for RMS
value_rms = pyx_exp_smoothed_value(self.kernel, self.alpha, y1**2,
self.old_rms)
self.old_rms = value_rms
self.level_rms = 10. * np.log10(value_rms + 0. * 1e-80)
self.level_max = 20. * np.log10(self.old_max + 0. * 1e-80)
if self.two_channels:
# second channel
y2 = floatdata[1, :]
# exponential smoothing for max
if len(y2) > 0:
value_max = np.abs(y2).max()
if value_max > self.old_max_2 * (1. - self.alpha2):
self.old_max_2 = value_max
else:
# exponential decrease
self.old_max_2 *= (1. - self.alpha2)
# exponential smoothing for RMS
value_rms = pyx_exp_smoothed_value(self.kernel, self.alpha, y2**2,
self.old_rms_2)
self.old_rms_2 = value_rms
self.level_rms_2 = 10. * np.log10(value_rms + 0. * 1e-80)
self.level_max_2 = 20. * np.log10(self.old_max_2 + 0. * 1e-80)
# method
def canvasUpdate(self):
if not self.isVisible():
return
self.i += 1
if self.i == LEVEL_TEXT_LABEL_STEPS:
if self.level_rms > -150.:
string_rms = "%+05.01f" % self.level_rms
else:
string_rms = "-Inf"
if self.level_max > -150.:
string_peak = "%+05.01f" % self.level_max
else:
string_peak = "-Inf"
self.label_rms.setText(string_rms)
self.label_peak.setText(string_peak)
self.meter.setValue(0, self.level_rms, self.level_max)
if self.two_channels:
self.meter.setValue(0, self.level_rms, self.level_max)
self.meter.setValue(1, self.level_rms_2, self.level_max_2)
if self.i == LEVEL_TEXT_LABEL_STEPS:
if self.level_rms_2 > -150.:
string_rms_2 = "%+05.01f" % self.level_rms_2
else:
string_rms_2 = "-Inf"
if self.level_max_2 > -150.:
string_peak_2 = "%+05.01f" % self.level_max_2
else:
string_peak_2 = "-Inf"
self.label_rms.setText("1: %s\n2: %s" %
(string_rms, string_rms_2))
self.label_peak.setText("1: %s\n2: %s" %
(string_peak, string_peak_2))
self.i = self.i % LEVEL_TEXT_LABEL_STEPS
# prevent re-layout
self.label_rms.setMinimumWidth(self.label_rms.width())
# 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)
def __init__(self, parent = None, logger = PrintLogger()):
QtGui.QWidget.__init__(self, parent)
self.setObjectName("Levels_Widget")
self.gridLayout = QtGui.QGridLayout(self)
self.gridLayout.setObjectName("gridLayout")
font = QtGui.QFont()
font.setPointSize(14)
font.setWeight(75)
font.setBold(True)
self.label_peak = QtGui.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 = QtGui.QLabel(self)
self.label_peak_legend.setAlignment(QtCore.Qt.AlignTop|QtCore.Qt.AlignRight)
self.label_peak_legend.setObjectName("label_peak_legend")
self.label_rms = QtGui.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 = QtGui.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, 0, 1, 4, 1)
self.label_rms.setText("-100.0")
self.label_peak.setText("-100.0")
self.label_rms_legend.setText("dB FS\n RMS")
self.label_peak_legend.setText("dB FS\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))
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 = 0.300 #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 = 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
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
class Levels_Widget(QtGui.QWidget):
def __init__(self, parent = None, logger = PrintLogger()):
QtGui.QWidget.__init__(self, parent)
self.setObjectName("Levels_Widget")
self.gridLayout = QtGui.QGridLayout(self)
self.gridLayout.setObjectName("gridLayout")
font = QtGui.QFont()
font.setPointSize(14)
font.setWeight(75)
font.setBold(True)
self.label_peak = QtGui.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 = QtGui.QLabel(self)
self.label_peak_legend.setAlignment(QtCore.Qt.AlignTop|QtCore.Qt.AlignRight)
self.label_peak_legend.setObjectName("label_peak_legend")
self.label_rms = QtGui.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 = QtGui.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, 0, 1, 4, 1)
self.label_rms.setText("-100.0")
self.label_peak.setText("-100.0")
self.label_rms_legend.setText("dB FS\n RMS")
self.label_peak_legend.setText("dB FS\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))
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 = 0.300 #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 = 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
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
# method
def set_buffer(self, buffer):
self.audiobuffer = buffer
# method
def update(self):
if not self.isVisible():
return
self.i += 1
# get the fresh data
floatdata = self.audiobuffer.newdata()
if floatdata.shape[0] > 1 and self.two_channels == False:
self.meter.setPortCount(2)
self.two_channels = True
elif floatdata.shape[0] == 1 and self.two_channels == True:
self.meter.setPortCount(1)
self.two_channels = False
# first channel
y1 = floatdata[0,:]
# exponential smoothing for max
if len(y1) > 0:
value_max = abs(y1).max()
if value_max > self.old_max*(1.-self.alpha2):
self.old_max = value_max
else:
# exponential decrease
self.old_max *= (1.-self.alpha2)
# exponential smoothing for RMS
value_rms = pyx_exp_smoothed_value(self.kernel, self.alpha, y1**2, self.old_rms)
self.old_rms = value_rms
level_rms = 10.*log10(value_rms + 0.*1e-80)
level_max = 20.*log10(self.old_max + 0.*1e-80)
if self.i == LEVEL_TEXT_LABEL_STEPS:
if level_rms > -150.:
string_rms = "%.01f" % level_rms
else:
string_rms = "-Inf"
if level_max > -150.:
string_peak = "%.01f" % level_max
else:
string_peak = "-Inf"
if not self.two_channels:
self.meter.setValue(0, level_rms, level_max)
if self.i == LEVEL_TEXT_LABEL_STEPS:
self.label_rms.setText(string_rms)
self.label_peak.setText(string_peak)
else:
# second channel
y2 = floatdata[1,:]
# exponential smoothing for max
if len(y2) > 0:
value_max = abs(y2).max()
if value_max > self.old_max_2*(1.-self.alpha2):
self.old_max_2 = value_max
else:
# exponential decrease
self.old_max_2 *= (1.-self.alpha2)
# exponential smoothing for RMS
value_rms = pyx_exp_smoothed_value(self.kernel, self.alpha, y2**2, self.old_rms_2)
self.old_rms_2 = value_rms
level_rms_2 = 10.*log10(value_rms + 0.*1e-80)
level_max_2 = 20.*log10(self.old_max_2 + 0.*1e-80)
#self.meter.m_iPortCount = 3
self.meter.setValue(0, level_rms, level_max)
self.meter.setValue(1, level_rms_2, level_max_2)
if self.i == LEVEL_TEXT_LABEL_STEPS:
if level_rms_2 > -150.:
string_rms_2 = "%.01f" % level_rms_2
else:
string_rms_2 = "-Inf"
if level_max > -150.:
string_peak_2 = "%.01f" % level_max_2
else:
string_peak_2 = "-Inf"
self.label_rms.setText("Ch1:\n%s\n\nCh2:\n%s" %(string_rms, string_rms_2))
self.label_peak.setText("Ch1:\n%s\n\nCh2:\n%s" %(string_peak, string_peak_2))
if self.i == LEVEL_TEXT_LABEL_STEPS:
self.i = 0
if 0:
fft_size = time*SAMPLING_RATE #1024
maxfreq = SAMPLING_RATE/2
sp, freq, A, B, C = self.proc.analyzelive(floatdata, fft_size, maxfreq)
print level_rms, 10*log10((sp**2).sum()*2.), freq.max()
# 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)
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
class Levels_Widget(QtGui.QWidget):
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
# method
def set_buffer(self, buffer):
self.audiobuffer = buffer
# method
def update(self):
if not self.isVisible():
return
# get the fresh data
floatdata = self.audiobuffer.newdata()
if floatdata.shape[0] > 1 and self.two_channels == False:
self.meter.setPortCount(4)
self.two_channels = True
elif floatdata.shape[0] == 1 and self.two_channels == True:
self.meter.setPortCount(2)
self.two_channels = False
# first channel
y1 = floatdata[0, :]
# exponential smoothing for max
if len(y1) > 0:
value_max = abs(y1).max()
if value_max > self.old_max * (1. - self.alpha2):
self.old_max = value_max
else:
# exponential decrease
self.old_max *= (1. - self.alpha2)
# exponential smoothing for RMS
value_rms = pyx_exp_smoothed_value(self.kernel, self.alpha, y1**2,
self.old_rms)
self.old_rms = value_rms
level_rms = 10. * log10(
value_rms * 2. + 0. * 1e-80) #*2. to get 0dB for a sine wave
level_max = 20. * log10(self.old_max + 0. * 1e-80)
if level_rms > -150.:
string_rms = "%.01f" % level_rms
else:
string_rms = "-Inf"
if level_max > -150.:
string_peak = "%.01f" % level_max
else:
string_peak = "-Inf"
if not self.two_channels:
self.meter.setValue(0, level_rms)
self.meter.setValue(1, level_max)
self.label_rms.setText(string_rms)
self.label_peak.setText(string_peak)
if self.two_channels:
# second channel
y2 = floatdata[1, :]
# exponential smoothing for max
if len(y2) > 0:
value_max = abs(y2).max()
if value_max > self.old_max_2 * (1. - self.alpha2):
self.old_max_2 = value_max
else:
# exponential decrease
self.old_max_2 *= (1. - self.alpha2)
# exponential smoothing for RMS
value_rms = pyx_exp_smoothed_value(self.kernel, self.alpha, y2**2,
self.old_rms_2)
self.old_rms_2 = value_rms
level_rms_2 = 10. * log10(
value_rms * 2. + 0. * 1e-80) #*2. to get 0dB for a sine wave
level_max_2 = 20. * log10(self.old_max_2 + 0. * 1e-80)
if level_rms_2 > -150.:
string_rms_2 = "%.01f" % level_rms_2
else:
string_rms_2 = "-Inf"
if level_max > -150.:
string_peak_2 = "%.01f" % level_max_2
else:
string_peak_2 = "-Inf"
#self.meter.m_iPortCount = 3
self.meter.setValue(0, level_rms)
self.meter.setValue(1, level_rms_2)
self.meter.setValue(2, level_max)
self.meter.setValue(3, level_max_2)
self.label_rms.setText("Ch1:\n%s\n\nCh2:\n%s" %
(string_rms, string_rms_2))
self.label_peak.setText("Ch1:\n%s\n\nCh2:\n%s" %
(string_peak, string_peak_2))
if 0:
fft_size = time * SAMPLING_RATE #1024
maxfreq = SAMPLING_RATE / 2
sp, freq, A, B, C = self.proc.analyzelive(floatdata, fft_size,
maxfreq)
print level_rms, 10 * log10((sp**2).sum() * 2.), freq.max()
# 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)
