class SideToneWidget(QWidget):
def __init__(self, parent):
super().__init__(parent)
# Save link to main window
self.main_window = parent
# Get the status bar
self.status_bar = parent.statusBar()
# Slot that will point to a QAudioInput some day
self.input_device = None
# Slot that will point to a QAudioOutput in time
self.otput_device = None
# set up layout, creating:
# self.input_info_list, list of QAudioInfo for inputs
# self.cb_inputs, combox of input names in same order
# self.otput_info_list, list of QAudioInfo for outputs
# self.cb_otputs, combox of output names in same order
# self.volume, volume slider
# self.mute, mute checkbox
self._uic()
# Connect up signals to slots.
# Changes in the comboxes go to in_device and ot_device
self.cb_inputs.currentIndexChanged.connect(self.in_dev_change)
self.cb_otputs.currentIndexChanged.connect(self.ot_dev_change)
# Mute button goes to mute_change
self.mute.stateChanged.connect(self.mute_change)
# Change in volume goes to volume_change
self.volume.valueChanged.connect(self.volume_change)
# Start with the mute switch on. This triggers the above two signals.
self.mute.setChecked(True)
# Slot for any change in volume (or mute). If we have an output device
# then convert level to a real and pass to the output device. If the new
# level is 0, tell the device to stop; if nonzero, tell it to start.
# Note we don't do anything about the input device level, it is always 1.0
def volume_change(self, new_level):
if self.otput_device: # we have an output device
self.otput_device.setVolume(self.volume.value() / 100)
if new_level == 0: # looks like a mute
# tell the output device to stop just in case it
# doesn't know about volume control.
self.otput_device.stop()
else: # non-zero level, if the output is stopped, start it
if self.otput_device.state() == QAudio.StoppedState:
self.otput_device.start()
# Slot for mute switch. Note that any change to the volume slider
# generates a signal to the volume_change slot.
def mute_change(self, onoff):
if onoff:
# Mute has been clicked ON. Remember the current volume.
# Turn the volume to zero.
self.volume_level = self.volume.value()
self.volume.setValue(0)
else:
# Mute has been clicked OFF. If we do not yet have input and
# output devices, get them. Then reset the old volume level.
if self.otput_device is None:
# We are starting up and have no devices. Fake a call to
# the checkbox-change entries thus creating devices.
self.in_dev_change(self.cb_inputs.currentIndex())
self.ot_dev_change(self.cb_inputs.currentIndex())
self.volume.setValue(self.volume_level)
# Slots for changes in the selection of the input- and output-device
# combo boxes. On startup we have neither an input nor an output device.
# We do not know which combox the user will fiddle with first. So either
# has to assume that the other device may not yet exist.
#
# On a change of input choice: if we have an input device, get rid of it.
# Create a new input device. Set its level to 1.0. If we
# have an output, connect the two.
def in_dev_change(self, new_index):
if self.input_device:
if self.otput_device:
self.otput_device.stop()
self.input_device.stop()
self.input_device = None # goodby object
# Get the QAudioDeviceInfo corresponding to this index of the combox.
audio_info = self.input_info_list[new_index]
# Create a new QAudioInput based on that.
preferred_format = audio_info.preferredFormat()
self.input_device = QAudioInput(audio_info, preferred_format)
self.input_device.setVolume(1.0)
self.input_device.setBufferSize(384)
# If we have an output device, redirect it to this input. This is
# done by asking the input device for its QIODevice, and passing that
# to the output device's start() method.
if self.otput_device:
self.input_device.start(self.otput_device.start())
# self.otput_device.start( self.input_device.start() )
# On a change in the selection of output choice: If we have an output
# device, get rid of it. Create a new output device. If we have an input
# device, connect the two. Set the output level from the volume slider.
def ot_dev_change(self, new_index):
if self.otput_device:
if self.input_device:
self.input_device.stop()
self.otput_device.stop()
self.otput_device = None
audio_info = self.otput_info_list[new_index]
preferred_format = audio_info.preferredFormat()
self.otput_device = QAudioOutput(audio_info, preferred_format)
self.otput_device.setVolume(self.volume.value() / 100)
# self.otput_device.setBufferSize( 384 )
if self.input_device:
self.input_device.start(self.otput_device.start())
# self.otput_device.start( self.input_device.start() )
def _uic(self):
"""
set up our layout which consists of:
Big Honkin' Label
[input combobox] [output combobox]
[volume slider] [x] Mute
hooking put the signals to useful slots is the job
of __init__. Here just make the layout.
"""
self.setMinimumWidth(400)
# Create the big honkin' label and logo
icon_pixmap = QPixmap(":/icon.png").scaledToWidth(64)
icon_label = QLabel()
icon_label.setPixmap(icon_pixmap)
text_label = QLabel("Sidetone!")
hb_label = QHBoxLayout()
hb_label.addStretch(1)
hb_label.addWidget(icon_label, 0)
hb_label.addWidget(text_label, 0)
hb_label.addStretch(1)
# Create a list of QAudioInfo objects for inputs
self.input_info_list = QAudioDeviceInfo.availableDevices(QAudio.AudioInput)
if 0 == len(self.input_info_list):
self.input_info_list = [QAudioDeviceInfo.defaultInputDevice()]
# Create a combo box and populate it with names of inputs
self.cb_inputs = QComboBox()
self.cb_inputs.addItems([audio_info.deviceName() for audio_info in self.input_info_list])
# Create a list of QAudioInfo objects for outputs
self.otput_info_list = QAudioDeviceInfo.availableDevices(QAudio.AudioOutput)
if 0 == len(self.otput_info_list):
self.otput_info_list = [QAudioDeviceInfo.defaultOutputDevice()]
self.status_bar.showMessage(
"{} inputs {} otputs".format(len(self.input_info_list), len(self.otput_info_list)), 2000
)
# Create a combo box and populate it with names of outputs
self.cb_otputs = QComboBox()
self.cb_otputs.addItems([audio_info.deviceName() for audio_info in self.otput_info_list])
# Lay those two out aligned to the outside
hb_combos = QHBoxLayout()
hb_combos.addWidget(self.cb_inputs, 1)
hb_combos.addStretch(0)
hb_combos.addWidget(self.cb_otputs, 1)
# Create a volume slider from 0 to 100.
self.volume = QSlider(Qt.Horizontal, self)
self.volume.setMinimum(0)
self.volume.setMaximum(100)
self.volume.setTickInterval(10)
self.volume.setTickPosition(QSlider.TicksBothSides)
# Create a checkbox "Mute"
self.mute = QCheckBox("Mute")
# Put those together in a row squeezed in the center
hb_volume = QHBoxLayout()
hb_volume.addStretch(1)
hb_volume.addWidget(self.volume, 1)
hb_volume.addWidget(self.mute, 0)
hb_volume.addStretch(1)
# Stack all those up as this widget's layout
vlayout = QVBoxLayout()
vlayout.addLayout(hb_label)
vlayout.addLayout(hb_combos)
vlayout.addLayout(hb_volume)
self.setLayout(vlayout)
class Visualizer(QMainWindow):
def __init__(self):
super().__init__()
self.initUI()
self._buflen = 1440 # 4096
def initUI(self):
# main window/layout
window = QWidget()
layout = QVBoxLayout()
# layout for audio device and sample rate selection
deviceLayout = QHBoxLayout()
# make audio device selection box and list of available devices
self.deviceBox = QComboBox()
defaultDeviceInfo = QAudioDeviceInfo.defaultInputDevice()
self.availableDevices = [defaultDeviceInfo]
self.availableDevices += QAudioDeviceInfo.availableDevices(
QAudio.AudioInput)
for device in self.availableDevices:
self.deviceBox.addItem(device.deviceName())
# make sample rate label and combobox
sRateLabel = QLabel("Sample rate:")
sRateLabel.setAlignment(Qt.AlignRight)
# user can choose between 44.1 and 48kHz (valid DetectorBank rates)
self.sRateBox = QComboBox()
self.sRateBox.addItem("44100")
self.sRateBox.addItem("48000")
self.sRateBox.setCurrentIndex(1)
# add device and sr widgets to device layout
deviceLayout.addWidget(self.deviceBox)
deviceLayout.addWidget(sRateLabel)
deviceLayout.addWidget(self.sRateBox)
# add device layout to main layout
layout.addLayout(deviceLayout)
# DetectorBank parameters layout
# two rows of three parameters
# each param needs label and edit,
# and a 'Start' button will be added at the bottom
# so grid should be 3x6
detBankParamLayout = QGridLayout()
# label and lineedit for each
bandwidthLabel = QLabel("Bandwidth (cents):")
dampingLabel = QLabel("Damping:")
gainLabel = QLabel("Gain:")
edoLabel = QLabel("EDO:")
lwrLabel = QLabel("Lower note:")
uprLabel = QLabel("Upper note:")
self.bandwidthEdit = QLineEdit("0")
self.dampingEdit = QLineEdit("0.0001")
self.gainEdit = QLineEdit("25")
self.edoEdit = QLineEdit("12")
self.lwrEdit = QLineEdit("A1")
self.uprEdit = QLineEdit("A7")
# store all in lists
detBankParamLabels = [bandwidthLabel, dampingLabel, gainLabel,
edoLabel, lwrLabel, uprLabel]
detBankParamEdits = [self.bandwidthEdit, self.dampingEdit,
self.gainEdit, self.edoEdit, self.lwrEdit,
self.uprEdit]
# fill first two rows of grid with labels and edits
row = 0
for row in range(2):
widgetNum = 0
for i in range((row*3), (row*3)+3):
detBankParamLayout.addWidget(detBankParamLabels[i], row,
widgetNum)
widgetNum += 1
detBankParamLayout.addWidget(detBankParamEdits[i], row,
widgetNum)
widgetNum += 1
# align labels to the right (next to the edit)
for i in range(len(detBankParamLabels)):
detBankParamLabels[i].setAlignment(Qt.AlignRight)
# button to make DetectorBank and start visualisation
row += 1
startButton = QPushButton("&Start!")
detBankParamLayout.addWidget(startButton, row, 5)
startButton.clicked.connect(self.start)
# add grid of detbank params (and start button) to main layout
layout.addLayout(detBankParamLayout)
window.setLayout(layout)
self.setCentralWidget(window)
self.show()
def initializeAudio(self, deviceInfo):
""" Make a QAudioInput from the given device """
# make buffers of 40ms of samples
self.refRate = 0.04
# mono, 32-bit float audio
fmt = QAudioFormat()
fmt.setSampleRate(self.getSampleRate())
fmt.setChannelCount(1)
fmt.setSampleSize(32)
fmt.setSampleType(QAudioFormat.Float)
fmt.setByteOrder(QAudioFormat.LittleEndian)
fmt.setCodec("audio/pcm")
if not deviceInfo.isFormatSupported(fmt):
fmt = deviceInfo.nearestFormat(fmt)
self.audioInput = QAudioInput(deviceInfo, fmt)
self.audioInput.setBufferSize(4*self.buflen) # set size in bytes
def startAudio(self):
self.audioDevice = self.audioInput.start()
self.audioDevice.readyRead.connect(self.updatePlot)
def start(self):
""" Initialise audio, make DetectorBank, open PlotData window and
start audio
"""
print('Initializing audio...')
deviceIdx = self.deviceBox.currentIndex()
device = self.availableDevices[deviceIdx]
self.initializeAudio(device)
print('Making DetectorBank...')
pitchOffset = self.makeDetectorBank()
print('Making PlotData object...')
self.pd = PlotData(self.db.getChans(), pitchOffset)
# self.pd.show()
print('Starting audio...')
self.startAudio()
def updatePlot(self):
# get data as float32
# 4*buflen is number of bytes
data = self.audioDevice.read(4*self.buflen)
data = np.frombuffer(data, dtype=np.int16)
data = np.array(data/2**15, dtype=np.dtype('float32'))
# set DetectorBank input
self.db.setInputBuffer(data)
# fill z with detector output
self.db.getZ(self.z)
# self.db.absZ(self.r, self.z)
self.pd.update(self.z)
# self.close()
def makeDetectorBank(self):
""" Make DetectorBank from given parameters """
sr = self.getSampleRate()
bandwidth_cents = float(self.bandwidthEdit.text())
dmp = float(self.dampingEdit.text())
gain = float(self.gainEdit.text())
edo = float(self.edoEdit.text())
lwr = self.lwrEdit.text()
upr = self.uprEdit.text()
lwr, pitchOffset = getNoteNum(lwr, edo)
upr, _ = getNoteNum(upr, edo)
upr += 1 # include upr note in DetectorBank
# make and fill frequency and bandwidth arrays
freq = np.zeros(int(upr-lwr))
bw = np.zeros(len(freq))
for i in range(len(freq)):
k = lwr+i
freq[i] = 440*2**(k/edo)
# if non-minimum bandwidth detectors requested, find B in Hz
if bandwidth_cents != 0:
bw[i] = centsToHz(freq[i], bandwidth_cents, edo)
# combine into stacked array
det_char = np.stack((freq,bw), axis=1)
# (almost) empty input buffer
buffer = np.zeros(1, dtype=np.float32)
# DetectorBank features
method = DetectorBank.runge_kutta
f_norm = DetectorBank.freq_unnormalized
a_norm = DetectorBank.amp_unnormalized
self.db = DetectorBank(sr, buffer, 4, det_char, method|f_norm|a_norm,
dmp, gain)
# create empty output array
self.z = np.zeros((int(self.db.getChans()),self.buflen),
dtype=np.complex128)
self.r = np.zeros(self.z.shape)
print("Made DetectorBank with {} channels, with a sample rate of {}Hz"
.format(self.db.getChans(), self.db.getSR()))
return pitchOffset
## get and/or set various values
def getSampleRate(self, returnType=int):
return returnType(self.sRateBox.currentText())
@property
def refreshRate(self):
return self._refRate
@refreshRate.setter
def refreshRate(self, value):
self._refRate = value
self.buflen = self._refRate * self.getSampleRate()
@property
def buflen(self):
return self._buflen
@buflen.setter
def buflen(self, value):
self._buflen = int(value)
class SideToneWidget(QWidget):
def __init__(self, parent, the_settings):
super().__init__(parent)
# Save link to main window
self.main_window = parent
# Save link to settings object
self.settings = the_settings
# Get the status bar
self.status_bar = parent.statusBar()
# just the time
self.time = QTime()
self.time.start()
# Slot that will point to a QAudioInput some day
self.input_device = None
# Slot that will point to a QAudioOutput in time
self.otput_device = None
# set up layout, creating:
# self.input_info_list, list of QAudioInfo for inputs
# self.cb_inputs, combox of input names in same order
# self.otput_info_list, list of QAudioInfo for outputs
# self.cb_otputs, combox of output names in same order
# self.volume, volume slider
# self.mute, mute checkbox
self._uic()
# Connect up signals to slots. Up to this point, the changes that
# _uic() made in e.g. the volume or mute, or the combobox selections,
# raised signals that were not connected. Now connect the signals
# so that user-changes go to our slots for handling.
# Mute button goes to mute_change
self.mute.stateChanged.connect(self.mute_change)
# Change in volume goes to volume_change
self.volume.valueChanged.connect(self.volume_change)
# Changes in the combox selections go to in_device and ot_device
self.cb_inputs.currentIndexChanged.connect(self.in_dev_change)
self.cb_otputs.currentIndexChanged.connect(self.ot_dev_change)
# Now pretend the user has made a selection of the in and out devices.
# That should result in activating everythings.
self.in_dev_change(self.cb_inputs.currentIndex())
self.ot_dev_change(self.cb_otputs.currentIndex())
# Method to disconnect the input and output devices, if they exist.
# This is called prior to any change in device selection.
# Note that the QWidget class has an existing method disconnect(),
# and we do not want to override that, so that name is not used.
def disconnect_devices(self):
# If an output device exists, make it stop. That prevents it
# trying to pull any data from the input device if any.
if self.otput_device is not None:
self.otput_device.stop()
# If an input device exists, make it stop also. That means it
# loses track of the output device it was formerly connected to.
if self.input_device is not None:
self.input_device.stop()
# Method to connect the input and output devices, if both exist. This is
# called after making any change in device selection.
def reconnect_devices(self):
if (self.input_device is not None) \
and (self.otput_device is not None ) :
# Connect the devices by asking the OUTput device for its
# QIODevice, and passing that to the INput device's start()
# method. This could equally well be done the other way,
# by passing the input dev's IODevice to the output device.
self.input_device.start(self.otput_device.start())
#self.otput_device.start( self.input_device.start() )
# In case the output device was just created, set its volume.
self.set_volume()
# Method to set the volume on the output device. (The input device volume
# is always 1.0.) This is called on any change of the volume slider or
# of the Mute button or of the output device choice.
def set_volume(self):
if self.mute.isChecked():
# Mute is ON, set volume to 0 regardless of volume slider
volume = 0.0
else:
# Mute is OFF, set volume to float version of volume slider
volume = self.volume.value() / 100
if self.otput_device:
# an output device exists (almost always true), set it
self.otput_device.setVolume(volume)
# Slot entered upon any change in the volume slider widget.
def volume_change(self, new_level):
if self.mute.isChecked():
# The Mute button is ON; assume the user wants it OFF, else why
# move the slider? Note this causes a call to set_volume().
self.mute.setChecked(False)
else:
# The Mute button is OFF, just change the volume.
self.set_volume()
# Slot entered upon toggling of the mute switch, by the user or by the
# code calling mute.setChecked(). Make sure the volume is set appropriately.
def mute_change(self, onoff):
self.set_volume()
# Slots for selection of the input and output devices. On startup we have
# neither an input nor an output device. We do not know which combox the
# user will fiddle with first.
# Slot entered upon any change in the selection of the input device
# combo box. The argument is the new index of the list of values.
def in_dev_change(self, new_index):
# Disconnect and stop the devices if they are connected.
self.disconnect_devices()
self.input_device = None # device object goes out of scope
# Get the QAudioDeviceInfo corresponding to this index of the combox.
audio_info = self.input_info_list[new_index]
# Create a new QAudioInput based on that.
preferred_format = audio_info.preferredFormat()
self.input_device = QAudioInput(audio_info, preferred_format)
# the input device volume is always 1.0, wide open.
self.input_device.setVolume(1.0)
# The choice of buffer size has a major impact on the lag. It needs
# to be small or there is severe echo; but if it is too small, there
# is a sputtering or "motor-boating" effect.
self.input_device.setBufferSize(384)
# hook up possible debug status display
self.input_device.stateChanged.connect(self.in_dev_state_change)
# reconnect the devices if possible.
self.reconnect_devices()
# Slot entered upon any change in the selection of output. The argument
# is the index to the list of output devices in the combobox.
def ot_dev_change(self, new_index):
print('index', new_index)
# Disconnect and stop the devices if they are connected.
self.disconnect_devices()
self.otput_device = None # device object goes out of scope
# Get the QAudioDeviceInfo corresponding to this index of the combox.
audio_info = self.otput_info_list[new_index]
# Create a new QAudioOutput based on that.
preferred_format = audio_info.preferredFormat()
self.otput_device = QAudioOutput(audio_info, preferred_format)
self.otput_device.setVolume(0) # reconnect will set correct volume
# hook up possible debug status display
self.otput_device.stateChanged.connect(self.ot_dev_state_change)
# reconnect the devices if possible. Which also sets the volume.
self.reconnect_devices()
# Show some text in the main-window status bar for 1 second, more or less.
def show_status(self, text, duration=1000):
self.status_bar.showMessage(text, duration)
# Slots called on any "state" change of an audio device. Optionally
# show the state in the main window status bar.
def in_dev_state_change(self, new_state):
#self.show_status(
#'{} in dev state {}'.format(self.time.elapsed(),int(new_state))
#)
pass
def ot_dev_state_change(self, new_state):
#self.show_status(
#'{} ot dev state {}'.format(self.time.elapsed(),int(new_state))
#)
pass
# Close events are only received by a top-level widget. When our top-level
# widget gets one, indicating the app is done, it calls this method.
def closeEvent(self, event):
# if we have devices, make them stop.
self.disconnect_devices()
# if the devices exist, reset them and then trash them.
if self.otput_device is not None:
self.otput_device.reset()
self.otput_device = None
if self.input_device is not None:
self.input_device.reset()
self.input_device = None
# Save the current selection of the input and output combo boxes,
# in the settings file.
in_dev_name = self.cb_inputs.currentText()
self.settings.setValue('in_dev_name', in_dev_name)
ot_dev_name = self.cb_otputs.currentText()
self.settings.setValue('ot_dev_name', ot_dev_name)
# Save the volume setting and mute status in the settings.
self.settings.setValue('volume', self.volume.value())
self.settings.setValue('mute_status', int(self.mute.isChecked()))
def _uic(self):
'''
set up our layout which consists of:
Big Honkin' Label
[input combobox] [output combobox]
[volume slider] [x] Mute
Hooking the signals to useful slots is the job
of __init__. Here just make the layout.
'''
self.setMinimumWidth(400)
# Create the big honkin' label and logo
icon_pixmap = QPixmap(':/icon.png').scaledToWidth(64)
icon_label = QLabel()
icon_label.setPixmap(icon_pixmap)
text_label = QLabel("Sidetone!")
hb_label = QHBoxLayout()
hb_label.addStretch(1)
hb_label.addWidget(icon_label, 0)
hb_label.addWidget(text_label, 0)
hb_label.addStretch(1)
# Create a list of QAudioInfo objects for inputs
self.input_info_list = QAudioDeviceInfo.availableDevices(
QAudio.AudioInput)
if 0 == len(self.input_info_list):
self.input_info_list = [QAudioDeviceInfo.defaultInputDevice()]
# Make a list of the name-strings for those items.
in_dev_names = [
audio_info.deviceName() for audio_info in self.input_info_list
]
# Create a combo box and populate it with those names
self.cb_inputs = QComboBox()
self.cb_inputs.addItems(in_dev_names)
# If the in_dev_name from the previous run is in the current list,
# make it current, otherwise pick the first item.
in_dev_name = self.settings.value('in_dev_name', 'unknown')
if in_dev_name in in_dev_names:
self.cb_inputs.setCurrentIndex(in_dev_names.index(in_dev_name))
else:
self.cb_inputs.setCurrentIndex(0)
# Create a list of QAudioInfo objects for outputs
self.otput_info_list = QAudioDeviceInfo.availableDevices(
QAudio.AudioOutput)
if 0 == len(self.otput_info_list):
self.otput_info_list = [QAudioDeviceInfo.defaultOutputDevice()]
# Make a list of the name-strings of those things
ot_dev_names = [
audio_info.deviceName() for audio_info in self.otput_info_list
]
# Create a combo box and populate it with those names
self.cb_otputs = QComboBox()
self.cb_otputs.addItems(ot_dev_names)
# If the ot_dev_name from the previous run is in the current list,
# make it the current choice in the box.
ot_dev_name = self.settings.value('ot_dev_name', 'unknown')
if ot_dev_name in ot_dev_names:
self.cb_otputs.setCurrentIndex(ot_dev_names.index(ot_dev_name))
else:
self.cb_otputs.setCurrentIndex(0)
#self.show_status(
#'{} inputs {} otputs'.format(len(self.input_info_list),len(self.otput_info_list))
#)
# Create a combo box and populate it with names of outputs
# Lay those two out aligned to the outside
hb_combos = QHBoxLayout()
hb_combos.addWidget(self.cb_inputs, 1)
hb_combos.addStretch(0)
hb_combos.addWidget(self.cb_otputs, 1)
# Create a volume slider from 0 to 100.
self.volume = QSlider(Qt.Horizontal, self)
self.volume.setMinimum(0)
self.volume.setMaximum(100)
self.volume.setTickInterval(10)
self.volume.setTickPosition(QSlider.TicksBothSides)
# set the volume slider to the value from the previous run, or zero.
self.volume.setValue(self.settings.value('volume', 0))
# Create a checkbox "Mute"
self.mute = QCheckBox('Mute')
# Set it to the value at the end of the last run, or to True
self.mute.setChecked(bool(self.settings.value('mute_status', 1)))
# Put those together in a row squeezed in the center
hb_volume = QHBoxLayout()
hb_volume.addStretch(1)
hb_volume.addWidget(self.volume, 1)
hb_volume.addWidget(self.mute, 0)
hb_volume.addStretch(1)
# Stack all those up as this widget's layout
vlayout = QVBoxLayout()
vlayout.addLayout(hb_label)
vlayout.addLayout(hb_combos)
vlayout.addLayout(hb_volume)
self.setLayout(vlayout)
class SideToneWidget(QWidget):
def __init__(self, parent):
super().__init__(parent)
# Save link to main window
self.main_window = parent
# Get the status bar
self.status_bar = parent.statusBar()
# Slot that will point to a QAudioInput some day
self.input_device = None
# Slot that will point to a QAudioOutput in time
self.otput_device = None
# set up layout, creating:
# self.input_info_list, list of QAudioInfo for inputs
# self.cb_inputs, combox of input names in same order
# self.otput_info_list, list of QAudioInfo for outputs
# self.cb_otputs, combox of output names in same order
# self.volume, volume slider
# self.mute, mute checkbox
self._uic()
# Connect up signals to slots.
# Changes in the comboxes go to in_device and ot_device
self.cb_inputs.currentIndexChanged.connect(self.in_dev_change)
self.cb_otputs.currentIndexChanged.connect(self.ot_dev_change)
# Mute button goes to mute_change
self.mute.stateChanged.connect(self.mute_change)
# Change in volume goes to volume_change
self.volume.valueChanged.connect(self.volume_change)
# Start with the mute switch on. This triggers the above two signals.
self.mute.setChecked(True)
# Slot for any change in volume (or mute). If we have an output device
# then convert level to a real and pass to the output device. If the new
# level is 0, tell the device to stop; if nonzero, tell it to start.
# Note we don't do anything about the input device level, it is always 1.0
def volume_change(self, new_level):
if self.otput_device: # we have an output device
self.otput_device.setVolume(self.volume.value() / 100)
if new_level == 0: # looks like a mute
# tell the output device to stop just in case it
# doesn't know about volume control.
self.otput_device.stop()
else: # non-zero level, if the output is stopped, start it
if self.otput_device.state() == QAudio.StoppedState:
self.otput_device.start()
# Slot for mute switch. Note that any change to the volume slider
# generates a signal to the volume_change slot.
def mute_change(self, onoff):
if onoff:
# Mute has been clicked ON. Remember the current volume.
# Turn the volume to zero.
self.volume_level = self.volume.value()
self.volume.setValue(0)
else:
# Mute has been clicked OFF. If we do not yet have input and
# output devices, get them. Then reset the old volume level.
if self.otput_device is None:
# We are starting up and have no devices. Fake a call to
# the checkbox-change entries thus creating devices.
self.in_dev_change(self.cb_inputs.currentIndex())
self.ot_dev_change(self.cb_inputs.currentIndex())
self.volume.setValue(self.volume_level)
# Slots for changes in the selection of the input- and output-device
# combo boxes. On startup we have neither an input nor an output device.
# We do not know which combox the user will fiddle with first. So either
# has to assume that the other device may not yet exist.
#
# On a change of input choice: if we have an input device, get rid of it.
# Create a new input device. Set its level to 1.0. If we
# have an output, connect the two.
def in_dev_change(self, new_index):
if self.input_device:
if self.otput_device:
self.otput_device.stop()
self.input_device.stop()
self.input_device = None # goodby object
# Get the QAudioDeviceInfo corresponding to this index of the combox.
audio_info = self.input_info_list[new_index]
# Create a new QAudioInput based on that.
preferred_format = audio_info.preferredFormat()
self.input_device = QAudioInput(audio_info, preferred_format)
self.input_device.setVolume(1.0)
self.input_device.setBufferSize(384)
# If we have an output device, redirect it to this input. This is
# done by asking the input device for its QIODevice, and passing that
# to the output device's start() method.
if self.otput_device:
self.input_device.start(self.otput_device.start())
#self.otput_device.start( self.input_device.start() )
# On a change in the selection of output choice: If we have an output
# device, get rid of it. Create a new output device. If we have an input
# device, connect the two. Set the output level from the volume slider.
def ot_dev_change(self, new_index):
if self.otput_device:
if self.input_device:
self.input_device.stop()
self.otput_device.stop()
self.otput_device = None
audio_info = self.otput_info_list[new_index]
preferred_format = audio_info.preferredFormat()
self.otput_device = QAudioOutput(audio_info, preferred_format)
self.otput_device.setVolume(self.volume.value() / 100)
#self.otput_device.setBufferSize( 384 )
if self.input_device:
self.input_device.start(self.otput_device.start())
#self.otput_device.start( self.input_device.start() )
def _uic(self):
'''
set up our layout which consists of:
Big Honkin' Label
[input combobox] [output combobox]
[volume slider] [x] Mute
hooking put the signals to useful slots is the job
of __init__. Here just make the layout.
'''
self.setMinimumWidth(400)
# Create the big honkin' label and logo
icon_pixmap = QPixmap(':/icon.png').scaledToWidth(64)
icon_label = QLabel()
icon_label.setPixmap(icon_pixmap)
text_label = QLabel("Sidetone!")
hb_label = QHBoxLayout()
hb_label.addStretch(1)
hb_label.addWidget(icon_label, 0)
hb_label.addWidget(text_label, 0)
hb_label.addStretch(1)
# Create a list of QAudioInfo objects for inputs
self.input_info_list = QAudioDeviceInfo.availableDevices(
QAudio.AudioInput)
if 0 == len(self.input_info_list):
self.input_info_list = [QAudioDeviceInfo.defaultInputDevice()]
# Create a combo box and populate it with names of inputs
self.cb_inputs = QComboBox()
self.cb_inputs.addItems(
[audio_info.deviceName() for audio_info in self.input_info_list])
# Create a list of QAudioInfo objects for outputs
self.otput_info_list = QAudioDeviceInfo.availableDevices(
QAudio.AudioOutput)
if 0 == len(self.otput_info_list):
self.otput_info_list = [QAudioDeviceInfo.defaultOutputDevice()]
self.status_bar.showMessage(
'{} inputs {} otputs'.format(len(self.input_info_list),
len(self.otput_info_list)), 2000)
# Create a combo box and populate it with names of outputs
self.cb_otputs = QComboBox()
self.cb_otputs.addItems(
[audio_info.deviceName() for audio_info in self.otput_info_list])
# Lay those two out aligned to the outside
hb_combos = QHBoxLayout()
hb_combos.addWidget(self.cb_inputs, 1)
hb_combos.addStretch(0)
hb_combos.addWidget(self.cb_otputs, 1)
# Create a volume slider from 0 to 100.
self.volume = QSlider(Qt.Horizontal, self)
self.volume.setMinimum(0)
self.volume.setMaximum(100)
self.volume.setTickInterval(10)
self.volume.setTickPosition(QSlider.TicksBothSides)
# Create a checkbox "Mute"
self.mute = QCheckBox('Mute')
# Put those together in a row squeezed in the center
hb_volume = QHBoxLayout()
hb_volume.addStretch(1)
hb_volume.addWidget(self.volume, 1)
hb_volume.addWidget(self.mute, 0)
hb_volume.addStretch(1)
# Stack all those up as this widget's layout
vlayout = QVBoxLayout()
vlayout.addLayout(hb_label)
vlayout.addLayout(hb_combos)
vlayout.addLayout(hb_volume)
self.setLayout(vlayout)
class QmyMainWindow(QMainWindow):
def __init__(self, parent=None):
super().__init__(parent) #调用父类构造函数，创建窗体
self.ui=Ui_MainWindow() #创建UI对象
self.ui.setupUi(self) #构造UI界面
self.ui.progBar_Max.setMaximum(256)
self.ui.progBar_Min.setMaximum(256)
self.ui.progBar_Diff.setMaximum(256)
self.ui.sliderVolumn.setMaximum(100)
self.ui.sliderVolumn.setValue(100)
self.ui.comboDevices.clear()
self.__deviceList=QAudioDeviceInfo.availableDevices(QAudio.AudioInput) #音频输入设备列表
for i in range(len(self.__deviceList)):
device=self.__deviceList[i] #QAudioDeviceInfo类
self.ui.comboDevices.addItem(device.deviceName())
## self.__deviceInfo =None #当前设备信息,QAudioDeviceInfo
self.audioDevice=None #音频输入设备,QAudioInput
self.BUFFER_SIZE=4000
self.ioDevice=None #第1种读取方法，内建的IODevice
## self.externalReader=None #第2种读取方法，外建的IODevice
self.recordFile=QFile() #第3种读取方法，使用QFile直接写入文件
if len(self.__deviceList)>0:
self.ui.comboDevices.setCurrentIndex(0) #触发comboDevices的信号currentIndexChanged()
## self.__deviceInfo =deviceList[0]
else:
self.ui.actStart.setEnabled(False)
self.ui.actDeviceTest.setEnabled(False)
self.ui.groupBoxDevice.setTitle("支持的音频输入设置(无设备)")
## ==============自定义功能函数========================
def __getSampleTypeStr(self,sampleType):
result="Unknown"
if sampleType==QAudioFormat.SignedInt:
result = "SignedInt"
elif sampleType==QAudioFormat.UnSignedInt:
result = "UnSignedInt"
elif sampleType==QAudioFormat.Float:
result = "Float"
elif sampleType==QAudioFormat.Unknown:
result = "Unknown"
return result
def __getByteOrderStr(self,endian):
if (endian==QAudioFormat.LittleEndian):
return "LittleEndian"
else:
return "BigEndian"
## ==============event处理函数==========================
## ==========由connectSlotsByName()自动连接的槽函数============
@pyqtSlot(int) ##选择音频输入设备
def on_comboDevices_currentIndexChanged(self,index):
deviceInfo =self.__deviceList[index] #当前音频设备,QAudioDeviceInfo类型
self.ui.comboCodec.clear()
codecs = deviceInfo.supportedCodecs() #支持的音频编码，字符串列表
for strLine in codecs:
self.ui.comboCodec.addItem(strLine)
self.ui.comboSampleRate.clear() #支持的采样率
sampleRates = deviceInfo.supportedSampleRates() #QList<int>
for i in sampleRates:
self.ui.comboSampleRate.addItem("%d"% i)
self.ui.comboChannels.clear() #支持的通道数
Channels = deviceInfo.supportedChannelCounts() #QList<int>
for i in Channels:
self.ui.comboChannels.addItem("%d"%i )
self.ui.comboSampleTypes.clear() #支持的采样点类型
sampleTypes = deviceInfo.supportedSampleTypes() #QList<QAudioFormat::SampleType>
for i in sampleTypes:
sampTypeStr=self.__getSampleTypeStr(i)
self.ui.comboSampleTypes.addItem(sampTypeStr,i)
self.ui.comboSampleSizes.clear() #采样点大小
sampleSizes = deviceInfo.supportedSampleSizes() #QList<int>
for i in sampleSizes:
self.ui.comboSampleSizes.addItem("%d"%i)
self.ui.comboByteOrder.clear() #字节序
endians = deviceInfo.supportedByteOrders() #QList<QAudioFormat::Endian>
for i in endians:
self.ui.comboByteOrder.addItem(self.__getByteOrderStr(i))
@pyqtSlot() ##使用内建IODevice
def on_radioSaveMode_Inner_clicked(self):
self.ui.groupBox_disp.setVisible(True)
@pyqtSlot() ##使用QFile对象(test.raw)
def on_radioSaveMode_QFile_clicked(self):
self.ui.groupBox_disp.setVisible(False)
@pyqtSlot(int) ##调节录音音量
def on_sliderVolumn_valueChanged(self,value):
self.ui.LabVol.setText("录音音量(%d%%)"%value)
@pyqtSlot() ##测试音频输入设备是否支持选择的设置
def on_actDeviceTest_triggered(self):
settings=QAudioFormat()
settings.setCodec(self.ui.comboCodec.currentText())
settings.setSampleRate(int(self.ui.comboSampleRate.currentText()))
settings.setChannelCount(int(self.ui.comboChannels.currentText()))
k=self.ui.comboSampleTypes.currentData()
settings.setSampleType(k) #QAudioFormat.SampleType
settings.setSampleSize(int(self.ui.comboSampleSizes.currentText()))
if (self.ui.comboByteOrder.currentText()=="LittleEndian"):
settings.setByteOrder(QAudioFormat.LittleEndian)
else:
settings.setByteOrder(QAudioFormat.BigEndian)
index=self.ui.comboDevices.currentIndex()
deviceInfo =self.__deviceList[index] #当前音频设备
if deviceInfo.isFormatSupported(settings):
QMessageBox.information(self,"消息","测试成功，设备支持此设置")
else:
QMessageBox.critical(self,"错误","测试失败，设备不支持此设置")
@pyqtSlot() ##开始音频输入
def on_actStart_triggered(self):
audioFormat=QAudioFormat() #使用固定格式
audioFormat.setSampleRate(8000)
audioFormat.setChannelCount(1)
audioFormat.setSampleSize(8)
audioFormat.setCodec("audio/pcm")
audioFormat.setByteOrder(QAudioFormat.LittleEndian)
audioFormat.setSampleType(QAudioFormat.UnSignedInt)
index=self.ui.comboDevices.currentIndex()
deviceInfo =self.__deviceList[index] #当前音频设备
if (False== deviceInfo.isFormatSupported(audioFormat)):
QMessageBox.critical(self,"错误","测试失败，输入设备不支持此设置")
return
self.audioDevice = QAudioInput(deviceInfo,audioFormat) #音频输入设备
self.audioDevice.setBufferSize(self.BUFFER_SIZE) #设置的缓冲区大小,字节数，并不一定等于实际数据块大小
self.audioDevice.stateChanged.connect(self.do_stateChanged) #状态变化
##1. 使用 start()->QIODevice 启动，返回的内置的IODevice, pull mode，利用readyRead()信号读出数据
if self.ui.radioSaveMode_Inner.isChecked():
self.ioDevice=self.audioDevice.start() #返回内建的IODevice
self.ioDevice.readyRead.connect(self.do_IO_readyRead)
## 2. 自定义流设备QWAudioBlockReader，push mode, start(QIODevice)，不行
## if self.ui.radioSaveMode_External.isChecked():
## self.externalReader = QmyAudioReader()
## self.externalReader.open(QIODevice.WriteOnly)
## self.externalReader.updateBlockInfo.connect(self.do_updateBlockInfo)
## self.audioDevice.start(self.externalReader) #使用外建的IODevice
##3. 写入文件,用 start(QIODevice)启动
if self.ui.radioSaveMode_QFile.isChecked():
self.recordFile.setFileName("test.raw")
self.recordFile.open(QIODevice.WriteOnly)
self.audioDevice.start(self.recordFile)
@pyqtSlot() ##停止音频输入
def on_actStop_triggered(self):
self.audioDevice.stop()
self.audioDevice.deleteLater()
##1. 使用 QIODevice =start()返回的内置的IODevice, pull mode，利用readyRead()信号读出数据
#无需处理,停止后self.ioDevice自动变为无效
##2. 外部IODevice接收音频输入数据的流设备
## if self.ui.radioSaveMode_External.isChecked():
## self.externalReader.close()
## self.externalReader.updateBlockSize.disconnect(self.do_updateBlockInfo)
## del self.externalReader #删除外建设备
##3. 写入文件,start(QIODevice) 启动
if self.ui.radioSaveMode_QFile.isChecked():
self.recordFile.close() #关闭文件
## =============自定义槽函数===============================
##1. 使用QIODevice* start()返回的内置的IODevice, pull mode，利用readyRead()信号读出数据
def do_IO_readyRead(self): ##内建IODevice，读取缓冲区数据
self.ui.LabBufferSize.setText("bufferSize()=%d"
%self.audioDevice.bufferSize())
byteCount = self.audioDevice.bytesReady() #可以读取的字节数
self.ui.LabBytesReady.setText("bytesReady()=%d"%byteCount)
if byteCount>self.BUFFER_SIZE:
byteCount=self.BUFFER_SIZE
buffer=self.ioDevice.read(byteCount) #返回的是bytes类型，便于处理
## buffer=self.ioDevice.readAll() #不能用readAll()读取，返回的是QByteArray,需要再转换为bytes
## print(type(buffer))
## print(buffer)
maxSize=len(buffer)
## print(maxSize)
self.ui.LabBlockSize.setText("IODevice数据字节数=%d"%maxSize)
maxV=0
minV=255
for k in range(maxSize):
V=buffer[k] #取一个字节,整数
if V>maxV:
maxV=V #求最大值
if V<minV:
minV=V #求最小值
self.ui.progBar_Max.setValue(maxV)
self.ui.progBar_Min.setValue(minV)
self.ui.progBar_Diff.setValue(maxV-minV)
def do_stateChanged(self,state): ##设备状态变化
isStoped=(state== QAudio.StoppedState) #停止状态
self.ui.groupBox_saveMode.setEnabled(isStoped)
self.ui.sliderVolumn.setEnabled(isStoped)
self.ui.actStart.setEnabled(isStoped)
self.ui.actStop.setEnabled(not isStoped)
self.ui.actDeviceTest.setEnabled(isStoped)
self.ui.sliderVolumn.setEnabled(isStoped)
if state== QAudio.ActiveState:
self.ui.statusBar.showMessage("state: ActiveState")
elif state== QAudio.SuspendedState:
self.ui.statusBar.showMessage("state: SuspendedState")
elif state== QAudio.StoppedState:
self.ui.statusBar.showMessage("state: StoppedState")
elif state== QAudio.IdleState:
self.ui.statusBar.showMessage("state: IdleState")
elif state== QAudio.InterruptedState:
self.ui.statusBar.showMessage("state: InterruptedState")
