class AudioBackend(QtCore.QObject):
underflow = QtCore.pyqtSignal()
new_data_available_from_callback = QtCore.pyqtSignal(
bytes, int, float, int)
new_data_available = QtCore.pyqtSignal(ndarray, float, int)
def callback(self, in_data, frame_count, time_info, status):
# do the minimum from here to prevent overflows, just pass the data to the main thread
input_time = time_info['input_buffer_adc_time']
# some API drivers in PortAudio do not return a valid time, so fallback to the current stream time
if input_time == 0.:
input_time = time_info['current_time']
if input_time == 0.:
input_time = self.stream.get_time()
self.new_data_available_from_callback.emit(in_data, frame_count,
input_time, status)
return (None, 0)
def __init__(self, logger):
QtCore.QObject.__init__(self)
self.logger = logger
self.duo_input = False
self.terminated = False
self.logger.push("Initializing PyAudio")
self.pa = PyAudio()
# look for devices
self.input_devices = self.get_input_devices()
self.output_devices = self.get_output_devices()
self.device = None
self.first_channel = None
self.second_channel = None
# we will try to open all the input devices until one
# works, starting by the default input device
for device in self.input_devices:
self.logger.push("Opening the stream")
try:
self.stream = self.open_stream(device)
self.stream.start_stream()
self.device = device
self.logger.push("Success")
break
except:
self.logger.push("Fail")
if self.device is not None:
self.first_channel = 0
nchannels = self.get_current_device_nchannels()
if nchannels == 1:
self.second_channel = 0
else:
self.second_channel = 1
# counter for the number of input buffer overflows
self.xruns = 0
self.chunk_number = 0
self.new_data_available_from_callback.connect(self.handle_new_data)
def close(self):
if self.stream is not None:
self.stream.stop_stream()
self.stream.close()
self.stream = None
if not self.terminated:
# call terminate on PortAudio
self.logger.push("Terminating PortAudio")
self.pa.terminate()
self.logger.push("PortAudio terminated")
# avoid calling PortAudio methods in the callback/slots
self.terminated = True
# method
def get_readable_devices_list(self):
devices_list = []
default_device_index = self.get_default_input_device()
for device in self.input_devices:
dev_info = self.pa.get_device_info_by_index(device)
api = self.pa.get_host_api_info_by_index(
dev_info['hostApi'])['name']
if device is default_device_index:
extra_info = ' (system default)'
else:
extra_info = ''
nchannels = self.pa.get_device_info_by_index(
device)['maxInputChannels']
desc = "%s (%d channels) (%s) %s" % (dev_info['name'], nchannels,
api, extra_info)
devices_list += [desc]
return devices_list
# method
def get_readable_output_devices_list(self):
devices_list = []
default_device_index = self.get_default_output_device()
for device in self.output_devices:
dev_info = self.pa.get_device_info_by_index(device)
api = self.pa.get_host_api_info_by_index(
dev_info['hostApi'])['name']
if device is default_device_index:
extra_info = ' (system default)'
else:
extra_info = ''
nchannels = self.pa.get_device_info_by_index(
device)['maxOutputChannels']
desc = "%s (%d channels) (%s) %s" % (dev_info['name'], nchannels,
api, extra_info)
devices_list += [desc]
return devices_list
# method
def get_default_input_device(self):
try:
index = self.pa.get_default_input_device_info()['index']
except IOError:
index = None
return index
# method
def get_default_output_device(self):
try:
index = self.pa.get_default_output_device_info()['index']
except IOError:
index = None
return index
# method
def get_device_count(self):
return self.pa.get_device_count()
# method
# returns a list of input devices index, starting with the system default
def get_input_devices(self):
device_count = self.get_device_count()
device_range = list(range(0, device_count))
default_input_device = self.get_default_input_device()
if default_input_device is not None:
# start by the default input device
device_range.remove(default_input_device)
device_range = [default_input_device] + device_range
# select only the input devices by looking at the number of input channels
input_devices = []
for device in device_range:
n_input_channels = self.pa.get_device_info_by_index(
device)['maxInputChannels']
if n_input_channels > 0:
input_devices += [device]
return input_devices
# method
# returns a list of output devices index, starting with the system default
def get_output_devices(self):
device_count = self.get_device_count()
device_range = list(range(0, device_count))
default_output_device = self.get_default_output_device()
if default_output_device is not None:
# start by the default input device
device_range.remove(default_output_device)
device_range = [default_output_device] + device_range
# select only the output devices by looking at the number of output channels
output_devices = []
for device in device_range:
n_output_channels = self.pa.get_device_info_by_index(
device)['maxOutputChannels']
if n_output_channels > 0:
output_devices += [device]
return output_devices
# method.
# The index parameter is the index in the self.input_devices list of devices !
# The return parameter is also an index in the same list.
def select_input_device(self, index):
device = self.input_devices[index]
# save current stream in case we need to restore it
previous_stream = self.stream
previous_device = self.device
self.logger.push("Trying to open input device #%d" % (index))
try:
self.stream = self.open_stream(device)
self.device = device
self.stream.start_stream()
success = True
except:
self.logger.push("Fail")
success = False
if self.stream is not None:
self.stream.close()
# restore previous stream
self.stream = previous_stream
self.device = previous_device
if success:
self.logger.push("Success")
previous_stream.close()
self.first_channel = 0
nchannels = self.get_current_device_nchannels()
if nchannels == 1:
self.second_channel = 0
else:
self.second_channel = 1
return success, self.input_devices.index(self.device)
# method
def select_first_channel(self, index):
self.first_channel = index
success = True
return success, self.first_channel
# method
def select_second_channel(self, index):
self.second_channel = index
success = True
return success, self.second_channel
# method
def open_stream(self, device):
# by default we open the device stream with all the channels
# (interleaved in the data buffer)
max_input_channels = self.pa.get_device_info_by_index(
device)['maxInputChannels']
stream = self.pa.open(format=paInt16,
channels=max_input_channels,
rate=SAMPLING_RATE,
input=True,
input_device_index=device,
stream_callback=self.callback,
frames_per_buffer=FRAMES_PER_BUFFER)
lat_ms = 1000 * stream.get_input_latency()
self.logger.push("Device claims %d ms latency" % (lat_ms))
return stream
# method
def open_output_stream(self, device, callback):
# by default we open the device stream with all the channels
# (interleaved in the data buffer)
max_output_channels = self.pa.get_device_info_by_index(
device)['maxOutputChannels']
stream = self.pa.open(format=paInt16,
channels=max_output_channels,
rate=SAMPLING_RATE,
output=True,
frames_per_buffer=FRAMES_PER_BUFFER,
output_device_index=device,
stream_callback=callback)
return stream
def is_output_format_supported(self, device, output_format):
max_output_channels = self.pa.get_device_info_by_index(
device)['maxOutputChannels']
success = self.pa.is_format_supported(
SAMPLING_RATE,
output_device=device,
output_channels=max_output_channels,
output_format=output_format)
return success
# method
# return the index of the current input device in the input devices list
# (not the same as the PortAudio index, since the latter is the index
# in the list of *all* devices, not only input ones)
def get_readable_current_device(self):
return self.input_devices.index(self.device)
# method
def get_readable_current_channels(self):
dev_info = self.pa.get_device_info_by_index(self.device)
nchannels = dev_info['maxInputChannels']
if nchannels == 2:
channels = ['L', 'R']
else:
channels = []
for channel in range(0, dev_info['maxInputChannels']):
channels += ["%d" % channel]
return channels
# method
def get_current_first_channel(self):
return self.first_channel
# method
def get_current_second_channel(self):
return self.second_channel
# method
def get_current_device_nchannels(self):
return self.pa.get_device_info_by_index(
self.device)['maxInputChannels']
def get_device_outputchannels_count(self, device):
return self.pa.get_device_info_by_index(device)['maxOutputChannels']
def handle_new_data(self, in_data, frame_count, input_time, status):
if self.terminated:
return
if status & paInputOverflow:
print("Stream overflow!")
self.xruns += 1
self.underflow.emit()
intdata_all_channels = fromstring(in_data, int16)
int16info = iinfo(int16)
norm_coeff = max(abs(int16info.min), int16info.max)
floatdata_all_channels = intdata_all_channels.astype(float64) / float(
norm_coeff)
channel = self.get_current_first_channel()
nchannels = self.get_current_device_nchannels()
if self.duo_input:
channel_2 = self.get_current_second_channel()
if len(floatdata_all_channels) != frame_count * nchannels:
print(
"Incoming data is not consistent with current channel settings."
)
return
floatdata1 = floatdata_all_channels[channel::nchannels]
if self.duo_input:
floatdata2 = floatdata_all_channels[channel_2::nchannels]
floatdata = vstack((floatdata1, floatdata2))
else:
floatdata = floatdata1
floatdata.shape = (1, floatdata.size)
self.new_data_available.emit(floatdata, input_time, status)
self.chunk_number += 1
def set_single_input(self):
self.duo_input = False
def set_duo_input(self):
self.duo_input = True
# returns the stream time in seconds
def get_stream_time(self):
try:
return self.stream.get_time()
except OSError:
return 0
def pause(self):
self.stream.stop_stream()
def restart(self):
self.stream.start_stream()
def __getAudioDevice(audio: pyaudio.PyAudio, deviceIndex, isInput: bool):
parameter = f'Audio{("input" if isInput else "Output")}Device'
# Use default device if not specified
if deviceIndex == None:
try:
if isInput:
a = audio.get_default_input_device_info()
deviceIndex = audio.get_default_input_device_info().get(
'index')
else:
deviceIndex = audio.get_default_output_device_info().get(
'index')
except:
deviceIndex = 0
if deviceIndex == None:
__error('Неверное имя или индекс аудиоустройтсва', parameter)
return (None, None)
# Extract device index if possible
try:
deviceIndex = int(deviceIndex)
except:
deviceIndex = str(deviceIndex)
# Resolve audio input & output devices over the list of devices
# available
deviceName = None
device = 0
for i in range(audio.get_device_count()):
#print(audio.get_device_info_by_index( i ))
device = audio.get_device_info_by_index(i)
name = str(device.get("name"))
# Resolve index by device name
if isinstance(deviceIndex, str) and name.lower().startswith(
deviceIndex.lower()):
deviceIndex = i
# Assign original device name
if isinstance(deviceIndex, int) and (deviceIndex == i):
deviceName = name
break
# check if device was resolved
if deviceIndex == None or deviceName == None:
__error('Неверное имя или индекс аудиоустройтсва', parameter)
channels = device.get('maxInputChannels') if isInput else device.get(
'maxOutputChannels')
if channels <= 0:
__error(
f'Устройство не имеет {"аудиовходов" if isInput else "аудиовыходов"}',
parameter)
return (deviceIndex, deviceName)
def ask_for_device(
p: pyaudio.PyAudio,
as_input: bool = False
) -> Optional[int]: # todo return device_info? and filter for input/output
"""returns the device_id selected by the user"""
if p.get_device_count() == 0:
raise Exception("No devices available")
default_device_index = p.get_default_input_device_info(
)["index"] if as_input else p.get_default_output_device_info()["index"]
for i in (get_input_device_indexes(p)
if as_input else get_output_device_indexes(p)):
info = p.get_device_info_by_index(i)
index = info["index"]
api_name = p.get_host_api_info_by_index(info["hostApi"])["name"]
device_name = info["name"]
print(f"{index}: \t {api_name} \t {device_name}")
device_id = None
while device_id is None:
user_input = input("Choose device index: ")
if user_input:
try:
device_id = int(user_input)
except ValueError:
print(f"Could not cast to int: {user_input}")
else:
print(f"Using default device index: {default_device_index}")
device_id = default_device_index
return device_id
class AudioStream(object):
def __init__(self, sample_rate=44100, channels=1, width=2, chunk=1024,
input_device_index=None):
self.sample_rate = sample_rate
self.channels = channels
self.width = width
self.chunk = chunk
self.input_device_index = input_device_index
def __enter__(self):
self._pa = PyAudio()
if self.input_device_index is None:
self.input_device_index = \
self._pa.get_default_input_device_info()['index']
self._stream = self._pa.open(
format=self._pa.get_format_from_width(self.width),
channels=self.channels,
rate=self.sample_rate,
input=True,
frames_per_buffer=self.chunk,
input_device_index=self.input_device_index)
self._stream.start_stream()
return self
def read(self):
''' On a buffer overflow this returns 0 bytes. '''
try:
return self._stream.read(self.chunk)
except IOError:
return ''
except AttributeError:
raise Exception('Must be used as a context manager.')
def stream(self):
try:
while True:
bytes = self.read()
if bytes:
self.handle(bytes)
except (KeyboardInterrupt, SystemExit):
pass
def __exit__(self, type, value, traceback):
self._stream.stop_stream()
self._stream.close()
self._pa.terminate()
def handle(self, bytes):
pass
def __init__(self):
#初始化窗体（R ,G ,B ,Light ,Width, Height）
super(eight_note_game, self).__init__(255, 255, 255, 255, 800, 600)
# 初始化参数
# frames_per_buffer
self.numSamples = 1000
self.trip = 0
#音量条
self.vbar = Sprite("resources/black.png")
self.vbar.position = 50, 450
self.vbar.scale_y = 0.1
self.vbar.image_anchor = 0, 0
self.add(self.vbar)
# 音量示数
self.label = cocos.text.Label(
'音量：',
font_name='Times New Roman', #字体样式
font_size=10, #字体大小
color=(0, 0, 0, 255), #字体颜色
anchor_x='center',
anchor_y='center' #字体位置
)
self.label.position = 30, 455
self.add(self.label)
#输入声音
audio = PyAudio()
SampleRate = int(audio.get_default_input_device_info()
['defaultSampleRate']) #读取默认的速率
self.stream = audio.open(format=paInt16,
channels=1,
input=True,
rate=SampleRate,
frames_per_buffer=self.numSamples)
#创建八分音符酱
self.eight_note = eight_note()
self.add(self.eight_note)
#创建地板
self.floor = cocos.cocosnode.CocosNode()
self.add(self.floor)
position = 0, 100
for i in range(200):
b = Block(position)
self.floor.add(b)
position = b.x + b.width, b.height
#游戏主循环
self.schedule(self.loop)
def record(self):
pa = PyAudio()
print("get_default_input_device_info()",
pa.get_default_input_device_info())
stream = pa.open(format=paInt16,
channels=1,
rate=self.framerate,
input=True,
frames_per_buffer=self.NUM_SAMPLES)
my_buf = []
count = 0
# 开始录音
while count < self.TIME: #控制录音时间
string_audio_data = stream.read(self.NUM_SAMPLES)
if count == 0:
# speech.say("一秒后请说")
print("一秒后请说：")
my_buf.append(string_audio_data)
count += 1
# print('.')
self.save_wave_file(self.path, my_buf)
stream.close()
class MainWindow(QtGui.QMainWindow):
""" A Qt QMainWindow that is home to a matplotlib figure and two combo
boxes. The combo boxes allow the selection of a sound card by API and
name. The figure will show the waveform of the audio input of that sound
card.
"""
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
# Monkey patch missing methods into PyAudio.
PyAudio.device_index_to_host_api_device_index = (
device_index_to_host_api_device_index)
self.pyaudio = PyAudio()
# Create the UI widgets.
central_widget = QtGui.QWidget(self)
self.setCentralWidget(central_widget)
main_layout = QtGui.QVBoxLayout(central_widget)
self.figure = FigureWidget()
main_layout.addWidget(self.figure)
horizontal_layout = QtGui.QHBoxLayout()
main_layout.addLayout(horizontal_layout)
api_list = QtGui.QComboBox()
api_list.setModel(APIListModel(self.pyaudio))
horizontal_layout.addWidget(api_list)
device_list = QtGui.QComboBox()
device_list_model = DeviceListModel(self.pyaudio)
device_list.setModel(device_list_model)
horizontal_layout.addWidget(device_list)
# Connect the moving parts
api_list.currentIndexChanged.connect(device_list_model.set_api_index)
api_list.currentIndexChanged.connect(self.change_api_index)
device_list.currentIndexChanged.connect(self.change_device_index)
# Tell all widgets to use the default audio device.
default_api_index = (
self.pyaudio.get_default_input_device_info()["hostApi"])
default_device_index = (
self.pyaudio.device_index_to_host_api_device_index(
self.pyaudio.get_default_host_api_info()["defaultInputDevice"],
default_api_index))
self.api_index = default_api_index
self.device_index = default_device_index
self.stream = None
api_list.setCurrentIndex(default_api_index)
device_list_model.set_api_index(default_api_index)
device_list.setCurrentIndex(default_device_index)
def closeEvent(self, event):
""" Called by Qt when the program quits. Stops audio processing. """
self.stream.close()
# wait for audio processing to clear its buffers
time.sleep(0.1)
def change_api_index(self, api_index):
""" Restarts audio processing with new index. """
self.api_index = api_index
self.restart_audio()
def change_device_index(self, device_index):
""" Restarts audio processing with new index. """
self.device_index = device_index
self.restart_audio()
def restart_audio(self):
""" Restarts audio processing with current API and device indices. """
device_info = (self.pyaudio.get_device_info_by_host_api_device_index(
self.api_index, self.device_index))
self.num_channels = device_info['maxInputChannels']
if self.stream:
self.stream.close()
self.stream = self.pyaudio.open(
rate=int(device_info['defaultSampleRate']),
channels=self.num_channels,
input_device_index=device_info['index'],
format=paFloat32,
input=True,
stream_callback=self.audio_callback)
self.figure.create_plots(self.num_channels)
def audio_callback(self, in_data, frame_count, time_info, status_flags):
""" Called by pyaudio whenever audio data is available.
Updates the matplotlib figure.
"""
data = numpy.fromstring(in_data, dtype=numpy.float32)
data = numpy.reshape(
data, (len(data) / self.num_channels, self.num_channels))
self.figure.draw(data)
return (None, paContinue)
class AudioDevice(QtCore.QObject):
def __init__(self, logger):
QtCore.QObject.__init__(self)
self.logger = logger
self.duo_input = False
self.logger.push("Initializing PyAudio")
self.pa = PyAudio()
# look for devices
self.input_devices = self.get_input_devices()
self.output_devices = self.get_output_devices()
for device in self.input_devices:
self.logger.push("Opening the stream")
self.stream = self.open_stream(device)
self.device = device
self.logger.push("Trying to read from input device %d" % device)
if self.try_input_stream(self.stream):
self.logger.push("Success")
break
else:
self.logger.push("Fail")
self.first_channel = 0
nchannels = self.get_current_device_nchannels()
if nchannels == 1:
self.second_channel = 0
else:
self.second_channel = 1
# counter for the number of input buffer overflows
self.xruns = 0
# method
def get_readable_devices_list(self):
devices_list = []
default_device_index = self.get_default_input_device()
for device in self.input_devices:
dev_info = self.pa.get_device_info_by_index(device)
api = self.pa.get_host_api_info_by_index(dev_info
['hostApi'])['name']
if device is default_device_index:
extra_info = ' (system default)'
else:
extra_info = ''
nchannels = self.pa.get_device_info_by_index(device)[
'maxInputChannels']
desc = "%s (%d channels) (%s) %s" % (dev_info['name'],
nchannels, api, extra_info)
devices_list += [desc]
return devices_list
# method
def get_readable_output_devices_list(self):
devices_list = []
default_device_index = self.get_default_output_device()
for device in self.output_devices:
dev_info = self.pa.get_device_info_by_index(device)
api = self.pa.get_host_api_info_by_index(dev_info['hostApi']
)['name']
if device is default_device_index:
extra_info = ' (system default)'
else:
extra_info = ''
nchannels = self.pa.get_device_info_by_index(device)[
'maxOutputChannels']
desc = "%s (%d channels) (%s) %s" % (dev_info['name'], nchannels,
api, extra_info)
devices_list += [desc]
return devices_list
# method
def get_default_input_device(self):
return self.pa.get_default_input_device_info()['index']
# method
def get_default_output_device(self):
return self.pa.get_default_output_device_info()['index']
# method
def get_device_count(self):
# FIXME only input devices should be chosen, not all of them !
return self.pa.get_device_count()
# method
# returns a list of input devices index, starting with the system default
def get_input_devices(self):
device_count = self.get_device_count()
default_input_device = self.get_default_input_device()
device_range = range(0, device_count)
# start by the default input device
device_range.remove(default_input_device)
device_range = [default_input_device] + device_range
# select only the input devices by looking at the number of input channels
input_devices = []
for device in device_range:
n_input_channels = self.pa.get_device_info_by_index(device)[
'maxInputChannels']
if n_input_channels > 0:
input_devices += [device]
return input_devices
# method
# returns a list of output devices index, starting with the system default
def get_output_devices(self):
device_count = self.get_device_count()
default_output_device = self.get_default_output_device()
device_range = range(0, device_count)
# start by the default input device
device_range.remove(default_output_device)
device_range = [default_output_device] + device_range
# select only the output devices by looking at the number of output channels
output_devices = []
for device in device_range:
n_output_channels = self.pa.get_device_info_by_index(device)[
'maxOutputChannels']
if n_output_channels > 0:
output_devices += [device]
return output_devices
# method
def select_input_device(self, device):
# save current stream in case we need to restore it
previous_stream = self.stream
previous_device = self.device
self.stream = self.open_stream(device)
self.device = device
self.logger.push("Trying to read from input device #%d" % (device))
if self.try_input_stream(self.stream):
self.logger.push("Success")
previous_stream.close()
success = True
self.first_channel = 0
nchannels = self.get_current_device_nchannels()
if nchannels == 1:
self.second_channel = 0
else:
self.second_channel = 1
else:
self.logger.push("Fail")
self.stream.close()
self.stream = previous_stream
self.device = previous_device
success = False
return success, self.device
# method
def select_first_channel(self, index):
self.first_channel = index
success = True
return success, self.first_channel
# method
def select_second_channel(self, index):
self.second_channel = index
success = True
return success, self.second_channel
# method
def open_stream(self, device):
''' by default we open the device stream with all the channels
# (interleaved in the data buffer)'''
maxInputChannels = self.pa.get_device_info_by_index(device)[
'maxInputChannels']
stream = self.pa.open(format=paInt32, channels=maxInputChannels,
rate=SAMPLING_RATE, input=True,
frames_per_buffer=FRAMES_PER_BUFFER, input_device_index=device)
return stream
# method
# return the index of the current input device in the input devices list
# (not the same as the PortAudio index, since the latter is the index
# in the list of *all* devices, not only input ones)
def get_readable_current_device(self):
i = 0
for device in self.input_devices:
if device == self.device:
break
else:
i += 1
return i
# method
def get_readable_current_channels(self):
dev_info = self.pa.get_device_info_by_index(self.device)
nchannels = dev_info['maxInputChannels']
if nchannels == 2:
channels = ['L', 'R']
else:
channels = []
for channel in range(0, dev_info['maxInputChannels']):
channels += ["%d" % channel]
return channels
# method
def get_current_first_channel(self):
return self.first_channel
# method
def get_current_second_channel(self):
return self.second_channel
# method
def get_current_device_nchannels(self):
return self.pa.get_device_info_by_index(self.device)[
'maxInputChannels']
# method
# return True on success
def try_input_stream(self, stream):
n_try = 0
while (stream.get_read_available() < FRAMES_PER_BUFFER and
n_try < 1000000):
n_try += 1
if n_try == 1000000:
return False
else:
lat_ms = 1000 * stream.get_input_latency()
self.logger.push("Device claims %d ms latency" % (lat_ms))
return True
# try to update the audio buffer
# return the number of chunks retrieved, and the time elapsed
def update(self, ringbuffer):
t = QtCore.QTime()
t.start()
channel = self.get_current_first_channel()
nchannels = self.get_current_device_nchannels()
if self.duo_input:
channel_2 = self.get_current_second_channel()
chunks = 0
available = self.stream.get_read_available()
available = int(floor(available / FRAMES_PER_BUFFER))
for _ in range(0, available):
try:
rawdata = self.stream.read(FRAMES_PER_BUFFER)
except IOError as inst:
# FIXME specialize this exception handling code
# to treat overflow errors particularly
self.xruns += 1
print "Caught an IOError on stream read.", inst
break
intdata_all_channels = fromstring(rawdata, int32)
int32info = iinfo(int32)
norm_coeff = max(abs(int32info.min), int32info.max)
floatdata_all_channels = (intdata_all_channels.astype(float64) /
float(norm_coeff))
floatdata1 = floatdata_all_channels[channel::nchannels]
if self.duo_input:
floatdata2 = floatdata_all_channels[channel_2::nchannels]
floatdata = vstack((floatdata1, floatdata2))
else:
floatdata = floatdata1
floatdata.shape = (1, FRAMES_PER_BUFFER)
# update the circular buffer
ringbuffer.push(floatdata)
chunks += 1
return (chunks, t.elapsed(), chunks * FRAMES_PER_BUFFER)
def set_single_input(self):
self.duo_input = False
def set_duo_input(self):
self.duo_input = True
# returns the stream time in seconds
def get_stream_time(self):
return self.stream.get_time()
class AudioDevice(QtCore.QObject):
def __init__(self, logger):
QtCore.QObject.__init__(self)
self.logger = logger
self.duo_input = False
self.logger.push("Initializing PyAudio")
self.pa = PyAudio()
# look for devices
self.input_devices = self.get_input_devices()
self.output_devices = self.get_output_devices()
for device in self.input_devices:
self.logger.push("Opening the stream")
self.stream = self.open_stream(device)
self.device = device
self.logger.push("Trying to read from input device %d" % device)
if self.try_input_stream(self.stream):
self.logger.push("Success")
break
else:
self.logger.push("Fail")
self.first_channel = 0
nchannels = self.get_current_device_nchannels()
if nchannels == 1:
self.second_channel = 0
else:
self.second_channel = 1
# counter for the number of input buffer overflows
self.xruns = 0
# method
def get_readable_devices_list(self):
devices_list = []
default_device_index = self.get_default_input_device()
for device in self.input_devices:
dev_info = self.pa.get_device_info_by_index(device)
api = self.pa.get_host_api_info_by_index(
dev_info['hostApi'])['name']
if device is default_device_index:
extra_info = ' (system default)'
else:
extra_info = ''
nchannels = self.pa.get_device_info_by_index(
device)['maxInputChannels']
desc = "%s (%d channels) (%s) %s" % (dev_info['name'], nchannels,
api, extra_info)
devices_list += [desc]
return devices_list
# method
def get_readable_output_devices_list(self):
devices_list = []
default_device_index = self.get_default_output_device()
for device in self.output_devices:
dev_info = self.pa.get_device_info_by_index(device)
api = self.pa.get_host_api_info_by_index(
dev_info['hostApi'])['name']
if device is default_device_index:
extra_info = ' (system default)'
else:
extra_info = ''
nchannels = self.pa.get_device_info_by_index(
device)['maxOutputChannels']
desc = "%s (%d channels) (%s) %s" % (dev_info['name'], nchannels,
api, extra_info)
devices_list += [desc]
return devices_list
# method
def get_default_input_device(self):
return self.pa.get_default_input_device_info()['index']
# method
def get_default_output_device(self):
return self.pa.get_default_output_device_info()['index']
# method
def get_device_count(self):
# FIXME only input devices should be chosen, not all of them !
return self.pa.get_device_count()
# method
# returns a list of input devices index, starting with the system default
def get_input_devices(self):
device_count = self.get_device_count()
default_input_device = self.get_default_input_device()
device_range = range(0, device_count)
# start by the default input device
device_range.remove(default_input_device)
device_range = [default_input_device] + device_range
# select only the input devices by looking at the number of input channels
input_devices = []
for device in device_range:
n_input_channels = self.pa.get_device_info_by_index(
device)['maxInputChannels']
if n_input_channels > 0:
input_devices += [device]
return input_devices
# method
# returns a list of output devices index, starting with the system default
def get_output_devices(self):
device_count = self.get_device_count()
default_output_device = self.get_default_output_device()
device_range = range(0, device_count)
# start by the default input device
device_range.remove(default_output_device)
device_range = [default_output_device] + device_range
# select only the output devices by looking at the number of output channels
output_devices = []
for device in device_range:
n_output_channels = self.pa.get_device_info_by_index(
device)['maxOutputChannels']
if n_output_channels > 0:
output_devices += [device]
return output_devices
# method
def select_input_device(self, device):
# save current stream in case we need to restore it
previous_stream = self.stream
previous_device = self.device
self.stream = self.open_stream(device)
self.device = device
self.logger.push("Trying to read from input device #%d" % (device))
if self.try_input_stream(self.stream):
self.logger.push("Success")
previous_stream.close()
success = True
self.first_channel = 0
nchannels = self.get_current_device_nchannels()
if nchannels == 1:
self.second_channel = 0
else:
self.second_channel = 1
else:
self.logger.push("Fail")
self.stream.close()
self.stream = previous_stream
self.device = previous_device
success = False
return success, self.device
# method
def select_first_channel(self, index):
self.first_channel = index
success = True
return success, self.first_channel
# method
def select_second_channel(self, index):
self.second_channel = index
success = True
return success, self.second_channel
# method
def open_stream(self, device):
''' by default we open the device stream with all the channels
# (interleaved in the data buffer)'''
maxInputChannels = self.pa.get_device_info_by_index(
device)['maxInputChannels']
stream = self.pa.open(format=paInt32,
channels=maxInputChannels,
rate=SAMPLING_RATE,
input=True,
frames_per_buffer=FRAMES_PER_BUFFER,
input_device_index=device)
return stream
# method
# return the index of the current input device in the input devices list
# (not the same as the PortAudio index, since the latter is the index
# in the list of *all* devices, not only input ones)
def get_readable_current_device(self):
i = 0
for device in self.input_devices:
if device == self.device:
break
else:
i += 1
return i
# method
def get_readable_current_channels(self):
dev_info = self.pa.get_device_info_by_index(self.device)
nchannels = dev_info['maxInputChannels']
if nchannels == 2:
channels = ['L', 'R']
else:
channels = []
for channel in range(0, dev_info['maxInputChannels']):
channels += ["%d" % channel]
return channels
# method
def get_current_first_channel(self):
return self.first_channel
# method
def get_current_second_channel(self):
return self.second_channel
# method
def get_current_device_nchannels(self):
return self.pa.get_device_info_by_index(
self.device)['maxInputChannels']
# method
# return True on success
def try_input_stream(self, stream):
n_try = 0
while (stream.get_read_available() < FRAMES_PER_BUFFER
and n_try < 1000000):
n_try += 1
if n_try == 1000000:
return False
else:
lat_ms = 1000 * stream.get_input_latency()
self.logger.push("Device claims %d ms latency" % (lat_ms))
return True
# try to update the audio buffer
# return the number of chunks retrieved, and the time elapsed
def update(self, ringbuffer):
t = QtCore.QTime()
t.start()
channel = self.get_current_first_channel()
nchannels = self.get_current_device_nchannels()
if self.duo_input:
channel_2 = self.get_current_second_channel()
chunks = 0
available = self.stream.get_read_available()
available = int(floor(available / FRAMES_PER_BUFFER))
for _ in range(0, available):
try:
rawdata = self.stream.read(FRAMES_PER_BUFFER)
except IOError as inst:
# FIXME specialize this exception handling code
# to treat overflow errors particularly
self.xruns += 1
print "Caught an IOError on stream read.", inst
break
intdata_all_channels = fromstring(rawdata, int32)
int32info = iinfo(int32)
norm_coeff = max(abs(int32info.min), int32info.max)
floatdata_all_channels = (intdata_all_channels.astype(float64) /
float(norm_coeff))
floatdata1 = floatdata_all_channels[channel::nchannels]
if self.duo_input:
floatdata2 = floatdata_all_channels[channel_2::nchannels]
floatdata = vstack((floatdata1, floatdata2))
else:
floatdata = floatdata1
floatdata.shape = (1, FRAMES_PER_BUFFER)
# update the circular buffer
ringbuffer.push(floatdata)
chunks += 1
return (chunks, t.elapsed(), chunks * FRAMES_PER_BUFFER)
def set_single_input(self):
self.duo_input = False
def set_duo_input(self):
self.duo_input = True
# returns the stream time in seconds
def get_stream_time(self):
return self.stream.get_time()
from print_color import print_cyan, print_green
from print_speed import print_slow
from pyaudio import PyAudio
from record import record_user_audio
from respond import respond
from speak import speak, remove_audio_file
from time import sleep
# Initialize a PyAudio instance
pa = PyAudio()
# Gets info on default input device
device_index = pa.get_default_input_device_info()['index']
device_name = pa.get_default_input_device_info()['name']
device_sample_rate = int(pa.get_default_input_device_info()['defaultSampleRate'])
def main():
intro = "\nHi, I am JoiBot!"
intro2 = "Your virtual assistant."
intro3 = f"\nSpeak to me using your device called {device_name}."
intro4 = "Go ahead. Ask me a question...\n"
print(intro+"👋")
audio_file = speak(intro)
remove_audio_file(audio_file)
print(intro2)
audio_file = speak(intro2)
remove_audio_file(audio_file)
print(intro3)
class AudioRecorder(DIWA_THREAD):
"""
A thread for capturing audio continuously.
It keeps a buffer that can be saved to a file.
By convention AudioRecorder is usually written in mixed case
even as we prefer upper case for threading types.
:param parent: Parent of the thread.
:type parent: :py:class:`diwacs.GraphicalUserInterface`
"""
def __init__(self, parent):
DIWA_THREAD.__init__(self, name='AudioRecorder')
self.parent = parent
self.py_audio = PyAudio()
self.stream = self.open_mic_stream()
self.buffer = deque(maxlen=diwavars.MAX_LENGTH)
def stop(self):
"""
Stop the audio recorder thread.
"""
DIWA_THREAD.stop(self)
sleep(0.1)
self.stream.close()
def find_input_device(self):
"""
Find a microphone device.
"""
for i in range(self.py_audio.get_device_count()):
# Internationalization hack...
# LOGGER.debug("Selecting audio device %s / %s " %
# (str(i),str(self.py_audio.get_device_count())))
# device_index = i
# return device_index
devinfo = self.py_audio.get_device_info_by_index(i)
for keyword in ['microphone']:
if keyword in devinfo['name'].lower():
return i
default_device = self.py_audio.get_default_input_device_info()
if default_device:
return default_device['index']
return None
def open_mic_stream(self):
"""
Opens the stream object for microphone.
"""
device_index = None
# uncomment the next line to search for a device.
# device_index = self.find_input_device()
stream = self.py_audio.open(
format=diwavars.FORMAT,
channels=diwavars.CHANNELS,
rate=diwavars.RATE,
input=True,
input_device_index=device_index,
frames_per_buffer=diwavars.INPUT_FRAMES_PER_BLOCK)
return stream
def run(self):
"""
Continuously record from the microphone to the buffer.
The size should be limited at diwavars.MAX_LENGTH constant.
The implementation keeps only the most recent data in the
case that there's too much data to store.
"""
while not self._stop.is_set():
try:
data = self.stream.read(diwavars.INPUT_FRAMES_PER_BLOCK)
while len(self.buffer) >= self.buffer.maxlen:
element = self.buffer.popleft()
del element
self.buffer.append(data)
except IOError as excp:
_logger().exception('Error recording: {0!s}'.format(excp))
def save(self, event_id, path):
"""
Save the buffer to a file.
"""
try:
_logger().debug('Saving audio buffer')
date_string = datetime.now().strftime('%d%m%Y%H%M')
filename = '{0}_{1}.wav'.format(event_id, date_string)
filepath = os.path.join(path, 'Audio')
if not os.path.exists(filepath):
os.makedirs(filepath)
filepath = os.path.join(filepath, filename)
sample_size = self.py_audio.get_sample_size(diwavars.FORMAT)
wave_file = wave.open(filepath, 'wb')
wave_file.setnchannels(diwavars.CHANNELS)
wave_file.setsampwidth(sample_size)
wave_file.setframerate(diwavars.RATE)
wave_file.writeframes(b''.join(self.buffer))
wave_file.close()
except:
_logger().exception('audio save exception')
#CallAfter(self.parent.ClearStatusText)
self.parent.diwa_state.remove_from_swnp_data('audio')
CallAfter(self.parent.UpdateScreens(update=True))
class MainWindow(QtGui.QMainWindow):
""" A Qt QMainWindow that is home to a matplotlib figure and two combo
boxes. The combo boxes allow the selection of a sound card by API and
name. The figure will show the waveform of the audio input of that sound
card.
"""
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
# Monkey patch missing methods into PyAudio.
PyAudio.device_index_to_host_api_device_index = (
device_index_to_host_api_device_index)
self.pyaudio = PyAudio()
# Create the UI widgets.
central_widget = QtGui.QWidget(self)
self.setCentralWidget(central_widget)
main_layout = QtGui.QVBoxLayout(central_widget)
self.figure = FigureWidget()
main_layout.addWidget(self.figure)
horizontal_layout = QtGui.QHBoxLayout()
main_layout.addLayout(horizontal_layout)
api_list = QtGui.QComboBox()
api_list.setModel(APIListModel(self.pyaudio))
horizontal_layout.addWidget(api_list)
device_list = QtGui.QComboBox()
device_list_model = DeviceListModel(self.pyaudio)
device_list.setModel(device_list_model)
horizontal_layout.addWidget(device_list)
# Connect the moving parts
api_list.currentIndexChanged.connect(device_list_model.set_api_index)
api_list.currentIndexChanged.connect(self.change_api_index)
device_list.currentIndexChanged.connect(self.change_device_index)
# Tell all widgets to use the default audio device.
default_api_index = (
self.pyaudio.get_default_input_device_info()["hostApi"])
default_device_index = (
self.pyaudio.device_index_to_host_api_device_index(
self.pyaudio.get_default_host_api_info()["defaultInputDevice"],
default_api_index))
self.api_index = default_api_index
self.device_index = default_device_index
self.stream = None
api_list.setCurrentIndex(default_api_index)
device_list_model.set_api_index(default_api_index)
device_list.setCurrentIndex(default_device_index)
def closeEvent(self, event):
""" Called by Qt when the program quits. Stops audio processing. """
self.stream.close()
# wait for audio processing to clear its buffers
time.sleep(0.1)
def change_api_index(self, api_index):
""" Restarts audio processing with new index. """
self.api_index = api_index
self.restart_audio()
def change_device_index(self, device_index):
""" Restarts audio processing with new index. """
self.device_index = device_index
self.restart_audio()
def restart_audio(self):
""" Restarts audio processing with current API and device indices. """
device_info = (
self.pyaudio.get_device_info_by_host_api_device_index(self.api_index,
self.device_index))
self.num_channels = device_info['maxInputChannels']
if self.stream:
self.stream.close()
self.stream = self.pyaudio.open(
rate=int(device_info['defaultSampleRate']),
channels=self.num_channels,
input_device_index=device_info['index'],
format=paFloat32,
input=True,
stream_callback=self.audio_callback)
self.figure.create_plots(self.num_channels)
def audio_callback(self, in_data, frame_count, time_info, status_flags):
""" Called by pyaudio whenever audio data is available.
Updates the matplotlib figure.
"""
data = numpy.fromstring(in_data, dtype=numpy.float32)
data = numpy.reshape(data, (len(data)/self.num_channels,self.num_channels))
self.figure.draw(data)
return (None, paContinue)
class AudioBackend(QtCore.QObject):
underflow = QtCore.pyqtSignal()
new_data_available_from_callback = QtCore.pyqtSignal(bytes, int, float, int)
new_data_available = QtCore.pyqtSignal(ndarray, float, int)
def callback(self, in_data, frame_count, time_info, status):
#do the minimum from here to prevent overflows, just pass the data to the main thread
input_time = time_info['input_buffer_adc_time']
# some API drivers in PortAudio do not return a valid time, so fallback to the current stream time
if input_time == 0.:
input_time = time_info['current_time']
if input_time == 0.:
input_time = self.stream.get_time()
self.new_data_available_from_callback.emit(in_data, frame_count, input_time, status)
return (None, 0)
def __init__(self, logger):
QtCore.QObject.__init__(self)
self.logger = logger
self.duo_input = False
self.logger.push("Initializing PyAudio")
self.pa = PyAudio()
# look for devices
self.input_devices = self.get_input_devices()
self.output_devices = self.get_output_devices()
self.device = None
self.first_channel = None
self.second_channel = None
# we will try to open all the input devices until one
# works, starting by the default input device
for device in self.input_devices:
self.logger.push("Opening the stream")
try:
self.stream = self.open_stream(device)
self.stream.start_stream()
self.device = device
self.logger.push("Success")
break
except:
self.logger.push("Fail")
if self.device is not None:
self.first_channel = 0
nchannels = self.get_current_device_nchannels()
if nchannels == 1:
self.second_channel = 0
else:
self.second_channel = 1
# counter for the number of input buffer overflows
self.xruns = 0
self.chunk_number = 0
self.new_data_available_from_callback.connect(self.handle_new_data)
def close(self):
self.stream.stop_stream()
self.stream.close()
self.stream = None
# method
def get_readable_devices_list(self):
devices_list = []
default_device_index = self.get_default_input_device()
for device in self.input_devices:
dev_info = self.pa.get_device_info_by_index(device)
api = self.pa.get_host_api_info_by_index(dev_info['hostApi'])['name']
if device is default_device_index:
extra_info = ' (system default)'
else:
extra_info = ''
nchannels = self.pa.get_device_info_by_index(device)['maxInputChannels']
desc = "%s (%d channels) (%s) %s" %(dev_info['name'], nchannels, api, extra_info)
devices_list += [desc]
return devices_list
# method
def get_readable_output_devices_list(self):
devices_list = []
default_device_index = self.get_default_output_device()
for device in self.output_devices:
dev_info = self.pa.get_device_info_by_index(device)
api = self.pa.get_host_api_info_by_index(dev_info['hostApi'])['name']
if device is default_device_index:
extra_info = ' (system default)'
else:
extra_info = ''
nchannels = self.pa.get_device_info_by_index(device)['maxOutputChannels']
desc = "%s (%d channels) (%s) %s" %(dev_info['name'], nchannels, api, extra_info)
devices_list += [desc]
return devices_list
# method
def get_default_input_device(self):
try:
index = self.pa.get_default_input_device_info()['index']
except IOError:
index = None
return index
# method
def get_default_output_device(self):
try:
index = self.pa.get_default_output_device_info()['index']
except IOError:
index = None
return
# method
def get_device_count(self):
# FIXME only input devices should be chosen, not all of them !
return self.pa.get_device_count()
# method
# returns a list of input devices index, starting with the system default
def get_input_devices(self):
device_count = self.get_device_count()
device_range = list(range(0, device_count))
default_input_device = self.get_default_input_device()
if default_input_device is not None:
# start by the default input device
device_range.remove(default_input_device)
device_range = [default_input_device] + device_range
# select only the input devices by looking at the number of input channels
input_devices = []
for device in device_range:
n_input_channels = self.pa.get_device_info_by_index(device)['maxInputChannels']
if n_input_channels > 0:
input_devices += [device]
return input_devices
# method
# returns a list of output devices index, starting with the system default
def get_output_devices(self):
device_count = self.get_device_count()
device_range = list(range(0, device_count))
default_output_device = self.get_default_output_device()
if default_output_device is not None:
# start by the default input device
device_range.remove(default_output_device)
device_range = [default_output_device] + device_range
# select only the output devices by looking at the number of output channels
output_devices = []
for device in device_range:
n_output_channels = self.pa.get_device_info_by_index(device)['maxOutputChannels']
if n_output_channels > 0:
output_devices += [device]
return output_devices
# method.
# The index parameter is the index in the self.input_devices list of devices !
# The return parameter is also an index in the same list.
def select_input_device(self, index):
device = self.input_devices[index]
# save current stream in case we need to restore it
previous_stream = self.stream
previous_device = self.device
self.logger.push("Trying to open input device #%d" % (index))
try:
self.stream = self.open_stream(device)
self.device = device
self.stream.start_stream()
success = True
except:
self.logger.push("Fail")
success = False
if self.stream is not None:
self.stream.close()
# restore previous stream
self.stream = previous_stream
self.device = previous_device
if success:
self.logger.push("Success")
previous_stream.close()
self.first_channel = 0
nchannels = self.get_current_device_nchannels()
if nchannels == 1:
self.second_channel = 0
else:
self.second_channel = 1
return success, self.input_devices.index(self.device)
# method
def select_first_channel(self, index):
self.first_channel = index
success = True
return success, self.first_channel
# method
def select_second_channel(self, index):
self.second_channel = index
success = True
return success, self.second_channel
# method
def open_stream(self, device):
# by default we open the device stream with all the channels
# (interleaved in the data buffer)
maxInputChannels = self.pa.get_device_info_by_index(device)['maxInputChannels']
stream = self.pa.open(format=paInt16, channels=maxInputChannels, rate=SAMPLING_RATE, input=True,
input_device_index=device, stream_callback=self.callback,
frames_per_buffer = FRAMES_PER_BUFFER)
lat_ms = 1000*stream.get_input_latency()
self.logger.push("Device claims %d ms latency" %(lat_ms))
return stream
# method
# return the index of the current input device in the input devices list
# (not the same as the PortAudio index, since the latter is the index
# in the list of *all* devices, not only input ones)
def get_readable_current_device(self):
return self.input_devices.index(self.device)
# method
def get_readable_current_channels(self):
dev_info = self.pa.get_device_info_by_index(self.device)
nchannels = dev_info['maxInputChannels']
if nchannels == 2:
channels = ['L', 'R']
else:
channels = []
for channel in range(0, dev_info['maxInputChannels']):
channels += ["%d" %channel]
return channels
# method
def get_current_first_channel(self):
return self.first_channel
# method
def get_current_second_channel(self):
return self.second_channel
# method
def get_current_device_nchannels(self):
return self.pa.get_device_info_by_index(self.device)['maxInputChannels']
def handle_new_data(self, in_data, frame_count, input_time, status):
if (status & paInputOverflow):
print("Stream overflow!")
self.xruns += 1
self.underflow.emit()
intdata_all_channels = fromstring(in_data, int16)
int16info = iinfo(int16)
norm_coeff = max(abs(int16info.min), int16info.max)
floatdata_all_channels = intdata_all_channels.astype(float64)/float(norm_coeff)
channel = self.get_current_first_channel()
nchannels = self.get_current_device_nchannels()
if self.duo_input:
channel_2 = self.get_current_second_channel()
floatdata1 = floatdata_all_channels[channel::nchannels]
if self.duo_input:
floatdata2 = floatdata_all_channels[channel_2::nchannels]
floatdata = vstack((floatdata1, floatdata2))
else:
floatdata = floatdata1
floatdata.shape = (1, floatdata.size)
self.new_data_available.emit(floatdata, input_time, status)
self.chunk_number += 1
def set_single_input(self):
self.duo_input = False
def set_duo_input(self):
self.duo_input = True
# returns the stream time in seconds
def get_stream_time(self):
return self.stream.get_time()
def pause(self):
self.stream.stop_stream()
def restart(self):
self.stream.start_stream()
class RadioChronicle:
# Default parameter values
fileNameFormat = './RC-%Y%m%d-%H%M%S.wav'
monitor = False
volumeTreshold = 5.0
maxPauseLength = 1.0
trailLength = 1.0
minRecordingLength = 0.5
chunkSize = 1024
inputDevice: Optional[int] = None
outputDevice: Optional[int] = None
audioBits = 16
sampleRate = 44100
inputStream: Optional[AudioStream] = None
outputStream: Optional[AudioStream] = None
audio: PyAudio
logger: Logger
audioFile: Optional[WaveWriter]
sample: bytes
sampleLength: int
audioFileLength: int
inLoop: bool
recording: bool
quitAfterRecording: bool
lastSecondVolumes: List[float]
fileName: str
localMaxVolume: float
def __init__(self) -> None: # pylint: disable=too-complex, too-many-statements
'''Fully constructs class instance, including reading configuration file and configuring audio devices.'''
try: # Reading command line options
configFileName = DEFAULT_CONFIG_FILE_NAME
(options, _args) = getopt(argv[1:], 'c:h', ['config=', 'help'])
for (option, optionValue) in options:
if option in ('-c', '--config'):
configFileName = optionValue.strip()
else:
usage()
except Exception as e:
usage(e)
try: # Reading config file and configuring logging
config = ConfigParser(interpolation=None,
inline_comment_prefixes=(';', ))
config.read_file(
open(configFileName
)) # Using read_file(open()) to make sure file exists
if config.has_section('loggers'):
fileConfig(config)
self.logger = getLogger()
if not self.logger.handlers: # Provide default logger
self.logger.addHandler(StreamHandler())
self.logger.setLevel(NOTSET)
signal(SIGTERM, self.sigTerm)
except Exception as e:
print(f"{TITLE}\n\nConfig error: {e}")
print(format_exc())
sysExit(1)
# Above this point, use print for diagnostics
# From this point on, we have self.logger to use instead
self.logger.info(TITLE)
self.logger.info(f"Using {configFileName}")
print() # Empty line to console only
try: # Applying configuration
channel = 'MONO'
value: str
try:
section = 'general'
try:
self.fileNameFormat = config.get(section,
'fileNameFormat').strip()
except NoOptionError:
pass
try:
self.monitor = config.getboolean(section, 'monitor')
except NoOptionError:
pass
except ValueError as e:
raise ValueError(
f"Bad value for [{section}].monitor: '{config.get(section, 'monitor')}', must be 1/yes/true/on or 0/no/false/off"
) from e
except NoSectionError:
pass
try:
section = 'tuning'
try:
value = config.get(section, 'volumeTreshold')
self.volumeTreshold = float(value)
except NoOptionError:
pass
except ValueError as e:
raise ValueError(
f"Bad value for [{section}].volumeTreshold: '{value}', must be a float"
) from e
try:
value = config.get(section, 'maxPauseLength')
self.maxPauseLength = float(value)
except NoOptionError:
pass
except ValueError as e:
raise ValueError(
f"Bad value for [{section}].maxPauseLength: '{value}', must be a float"
) from e
try:
value = config.get(section, 'minRecordingLength')
self.minRecordingLength = float(value)
except NoOptionError:
pass
except ValueError as e:
raise ValueError(
f"Bad value for [{section}].minRecordingLength: '{value}', must be a float"
) from e
try:
value = config.get(section, 'trailLength')
self.trailLength = float(value)
except NoOptionError:
pass
except ValueError as e:
raise ValueError(
f"Bad value for [{section}].trailLength: '{value}', must be a float"
) from e
except NoSectionError:
pass
try:
section = 'device'
try:
value = config.get(section, 'chunkSize')
self.chunkSize = int(value)
except NoOptionError:
pass
except ValueError as e:
raise ValueError(
f"Bad value for [{section}].chunkSize: '{value}', must be an integer"
) from e
try:
value = config.get(section, 'inputDevice')
self.inputDevice = int(value)
except NoOptionError:
pass
except ValueError as e:
raise ValueError(
f"Bad value for [{section}].inputDevice: '{value}', must be an integer"
) from e
try:
value = config.get(section, 'outputDevice')
self.outputDevice = int(value)
except NoOptionError:
pass
except ValueError as e:
raise ValueError(
f"Bad value for [{section}].outputDevice: '{value}', must be an integer"
) from e
try:
value = config.get(section, 'audioBits')
self.audioBits = int(value)
except NoOptionError:
pass
except ValueError as e:
raise ValueError(
f"Bad value for [{section}].audioBits: '{value}', must be an integer"
) from e
try:
value = config.get(section, 'sampleRate')
self.sampleRate = int(value)
except NoOptionError:
pass
except ValueError as e:
raise ValueError(
f"Bad value for [{section}].sampleRate: '{value}', must be an integer"
) from e
try:
channel = config.get(section, 'channel') # pylint: disable=redefined-variable-type # Will be processed later
except NoOptionError:
pass
except NoSectionError:
pass
# Validating configuration parameters
if not self.fileNameFormat:
raise ValueError(
"Bad value for fileNameFormat: must be not empty")
if not 0 <= self.volumeTreshold <= 100:
raise ValueError(
f"Bad value for volumeTreshold: {self.volumeTreshold:.2f}, must be 0-100"
)
if self.maxPauseLength < 0:
self.maxPauseLength = 0.0
if self.minRecordingLength < 0:
self.minRecordingLength = 0.0
if self.trailLength < 0:
self.trailLength = 0.0
if self.chunkSize < 1:
raise ValueError(
f"Bad value for chunkSize: {self.chunkSize}, must be 1 or more"
)
if self.inputDevice:
if self.inputDevice == -1:
self.inputDevice = None
elif self.inputDevice < -1:
raise ValueError(
f"Bad value for input device: {self.inputDevice}, must be -1 or more"
)
if self.outputDevice:
if self.outputDevice == -1:
self.outputDevice = None
elif self.outputDevice < -1:
raise ValueError(
f"Bad value for output device: {self.outputDevice}, must be -1 or more"
)
if self.audioBits not in (8, 16, 32):
raise ValueError(
f"Bad value for audioBits: {self.audioBits}, must be 8, 16, or 32"
)
if self.sampleRate < 1:
raise ValueError(
f"Bad value for chunkSize: {self.sampleRate}, must be positive"
)
try:
intChannel: Optional[int] = int(channel)
assert intChannel is not None
if intChannel <= 0:
intChannel = None # Exception will be thrown below
except ValueError:
intChannel = CHANNEL_NUMBERS.get(
channel.strip().upper()) # Would be None if not found
if intChannel is None:
raise ValueError(
f"Bad value for channel: {channel}, must be LEFT/RIGHT/STEREO/ALL/MONO or a number of 1 or more"
)
self.channel = intChannel
# Accessing PyAudio engine
self.audio = PyAudio()
print(f"{self.deviceInfo()}\n"
) # Using print for non-functional logging
# Accessing audio devices
try:
if self.inputDevice is not None:
inputDeviceInfo = self.audio.get_device_info_by_index(
self.inputDevice)
self.logger.info(
f"Using input device {self.deviceInfo(inputDeviceInfo, False)}"
)
else:
inputDeviceInfo = self.audio.get_default_input_device_info(
)
self.logger.info(
f"Using default input device {self.deviceInfo(inputDeviceInfo, False)}"
)
except ValueError as e:
raise ValueError(
f"{f'Input device {self.inputDevice}' if self.inputDevice is not None else 'Default input device'} is not in fact an input device"
) from e
except IOError as e:
raise IOError(
f"Can't access {f'input device {self.inputDevice}' if self.inputDevice is not None else 'default input device'}: {e}"
) from e
try:
if self.outputDevice is not None:
outputDeviceInfo = self.audio.get_device_info_by_index(
self.outputDevice)
self.logger.info(
f"Using output device {self.deviceInfo(outputDeviceInfo, True)}"
)
else:
outputDeviceInfo = self.audio.get_default_output_device_info(
)
self.logger.info(
f"Using default output device {self.deviceInfo(outputDeviceInfo, True)}"
)
except ValueError as e:
raise ValueError(
f"{f'output device {self.outputDevice}' if self.outputDevice is not None else 'Default output device'} is not in fact an output device"
) from e
except IOError as e:
raise IOError(
f"Can't access {f'output device {self.outputDevice}' if self.outputDevice is not None else 'default output device'}: {e}"
) from e
print() # Empty line to console only
# Calculating derivative paratemers
self.numInputChannels = 1 if self.channel == MONO else cast(
int, inputDeviceInfo['maxInputChannels'])
assert self.numInputChannels > 0
if self.channel > self.numInputChannels:
raise ValueError(
f"Bad value for channel: {self.channel}, must be no more than {self.numInputChannels}"
)
self.numOutputChannels = self.numInputChannels if self.channel == STEREO else 1
assert self.numOutputChannels > 0
self.audioBytes = self.audioBits // 8
self.maxVolume = 1 << (self.audioBits - 1)
self.audioFormat = self.audio.get_format_from_width(
self.audioBytes, False)
self.packFormat = PACK_FORMATS[self.audioBits]
self.inputBlockSize = self.numInputChannels * self.chunkSize * self.audioBytes
self.outputBlockSize = self.numOutputChannels * self.chunkSize * self.audioBytes
self.inputSecondSize = self.numInputChannels * self.sampleRate * self.audioBytes
self.outputSecondSize = self.numOutputChannels * self.sampleRate * self.audioBytes
self.chunksInSecond = self.sampleRate // self.chunkSize
self.chunksToStop = self.chunksInSecond * self.maxPauseLength
self.chunksOfFadeout = self.chunksInSecond * self.trailLength
# Diagnosting audio devices
if not self.createInputStream():
raise Exception("Can't create input stream")
self.closeInputStream()
if not self.createOutputStream():
raise Exception("Can't create output stream")
self.closeOutputStream()
# Printing configuration info
self.logger.info(
f"Recording {self.sampleRate}Hz/{self.audioBits}-bit/{CHANNEL_NAMES.get(self.channel) or f'channel {self.channel}'} to {self.fileNameFormat}"
)
self.logger.info(
f"Volume threshold {self.volumeTreshold:.2f}%, max pause {self.maxPauseLength:.1f} seconds, min recording length {self.minRecordingLength:.1f} seconds, trail {self.trailLength:.1f} seconds"
)
self.logger.info(f"Monitor is {'ON' if self.monitor else 'OFF'}")
print("Type 'help' for console commands reference"
) # Using print for non-functional logging
print() # Empty line to console only
except Exception as e:
self.logger.error(f"Configuration error: {e}")
print(format_exc())
sysExit(1)
def __del__(self) -> None:
'''Frees the PyAudio resources.'''
if self.audio:
self.closeInputStream()
self.closeOutputStream()
self.audio.terminate()
self.logger.debug("destroyed")
def deviceInfo(self,
device: Union[int, Mapping[str, Union[str, int, float]],
None] = None,
expectOutput: Optional[bool] = None) -> str:
'''Provides string information about system audio device(s).'''
if device is None:
# Return info on all available devices
inputDevices = []
outputDevices = []
for i in range(self.audio.get_device_count()):
device = self.audio.get_device_info_by_index(i)
if device['maxOutputChannels']:
outputDevices.append(device)
if device['maxInputChannels']:
inputDevices.append(device)
return '\n'.join(
("Detected audio input devices:",
'\n'.join(self.deviceInfo(device) for device in inputDevices),
"\nDetected audio output devices:", '\n'.join(
self.deviceInfo(device) for device in outputDevices)))
# else Return info on a particular device
if isinstance(device, int):
device = self.audio.get_device_info_by_index(device)
inputChannels = device['maxInputChannels']
outputChannels = device['maxOutputChannels']
if expectOutput is not None and not bool(
outputChannels if expectOutput else inputChannels):
raise ValueError
return f"{device['index']}: {device['name']} ({inputChannels}/{outputChannels} channels)"
def createInputStream(self) -> bool:
'''Creates an input stream if it doesn't already exist.
Returns True if stream already exists or was created successfuly, False otherwise.'''
if self.inputStream:
return True
try:
self.inputStream = self.audio.open(self.sampleRate,
self.numInputChannels,
self.audioFormat, True, False,
self.inputDevice, None,
self.chunkSize)
return True
except Exception as e:
self.logger.warning(
f"Error creating input stream: {(type(e).__name__)}: {e}")
return False
def createOutputStream(self) -> bool:
'''Creates an output stream if it doesn't already exist.
Returns True if stream already exists or was created successfuly, False otherwise.'''
if self.outputStream:
return True
try:
self.outputStream = self.audio.open(self.sampleRate,
self.numOutputChannels,
self.audioFormat, False, True,
None, self.outputDevice,
self.chunkSize)
return True
except Exception as e:
self.logger.warning(
f"Error creating output stream: {(type(e).__name__)}: {e}")
return False
def closeInputStream(self) -> None:
if self.inputStream:
self.inputStream.close()
self.inputStream = None
def closeOutputStream(self) -> None:
if self.outputStream:
self.outputStream.close()
self.outputStream = None
def readAudioData(self) -> Optional[bytes]:
'''Reads a chunk of audio data from the input stream.
Returns the retrieved data if successful, None otherwise.'''
if not self.createInputStream():
return None
try:
assert self.inputStream
data = self.inputStream.read(self.chunkSize)
return data
except Exception as e:
# Note: IOError: [Errno Input overflowed] -9981 often occurs when running under debugger
# Note: IOError: [Errno Unanticipated host error] -9999 occurs when audio device is removed (cable unplugged)
# Note: After 5-10 occurences of the above exception system hangs, so stream re-create seems necessary
self.logger.warning(
f"Audio input error: {(type(e).__name__)}: {e}")
self.closeInputStream()
self.saveSample()
return None
def writeAudioData(self, data: bytes) -> bool:
'''Writes a chunk of audio data to the output stream.
Returns True if successful, False otherwise.'''
if not self.createOutputStream():
return False
try:
assert self.outputStream
self.outputStream.write(data)
return True
except Exception as e:
self.logger.warning(
f"Audio output error: {(type(e).__name__)}: {e}")
self.closeOutputStream()
return False
def saveSample(self) -> bool:
'''Saves the curent sample to the audio file.
If the file does not exists, it is created.
If the sample length is not equal to the self.sampleLength value, it means, we've cut
the silence at the end of the sample, so it's the end of the file and it should be closed.
The function returns True on success or if the recording is off, False otherwise.'''
if not self.recording:
return True
try:
if self.sampleLength:
finalSample = True
else:
# If sampleLength wasn't set manualy, all the sample is saved.
# It means the recording isn't over yet.
self.sampleLength = len(self.sample)
finalSample = False
self.audioFileLength += self.sampleLength
recordLength = (float(self.audioFileLength) /
self.outputSecondSize)
if recordLength > self.minRecordingLength: # The save-to-file process starts only when the sample is long enough
if not self.audioFile: # Creating the file if necessary
self.audioFile = waveOpen(self.fileName, 'wb')
assert self.audioFile
self.audioFile.setnchannels(self.numOutputChannels)
self.audioFile.setsampwidth(self.audioBytes)
self.audioFile.setframerate(self.sampleRate)
self.audioFile.writeframes(
self.sample[:self.sampleLength]
) # Removing extra silence at the end, if needed
self.sample = b''
self.sampleLength = 0
if finalSample or not self.inLoop:
self.recording = False
self.audioFile.close()
self.audioFile = None
self.logger.info(
f"Recording finished, max volume {self.localMaxVolume:.2f}%, {recordLength:.1f} seconds"
)
return True
if finalSample or not self.inLoop:
self.recording = False
self.logger.info(
f"Recording discarded as it's too short ({recordLength:.1f} seconds)"
)
else:
self.audioFileLength -= self.sampleLength # If the sample is short we do not operate with it, so param changes should be undone
return True
except Exception as e:
self.logger.warning(
f"File output error: {(type(e).__name__)}: {e}")
return False
def run(self) -> None:
'''Runs main audio processing loop.'''
self.audioFile = None
self.sampleLength = 0
self.audioFileLength = 0
self.inLoop = True
self.recording = False
self.quitAfterRecording = False
self.lastSecondVolumes = [0.0] * self.chunksInSecond
chunkInSecond = 0
start_new_thread(self.commandConsole,
()) # Start command console thread
self.logger.info("Listening started")
# Main audio processing loop
try:
while self.inLoop:
# Retrieve next chunk of audio data
data = self.readAudioData()
if not data: # Error occurred
sleep(1.0 / self.chunksInSecond
) # Avoid querying malfunctioning device too often
continue
assert len(data) == self.inputBlockSize
if self.channel not in (
MONO,
STEREO): # Extract the data for particular channel
data = b''.join(
data[i:i + self.audioBytes]
for i in range((self.channel - 1) * self.audioBytes,
len(data), self.numInputChannels *
self.audioBytes))
assert len(data) == self.outputBlockSize
if self.monitor: # Provide monitor output
self.writeAudioData(data)
# Gathering volume statistics
volume = (mean(
abs(
cast(
int,
unpack(self.packFormat, data[i:i +
self.audioBytes])[0]))
for i in range(0, len(data), self.audioBytes)) * 100 +
self.maxVolume // 2) / self.maxVolume # pylint: disable=old-division
self.lastSecondVolumes[
chunkInSecond] = volume # Logging the sound volume during the last second
chunkInSecond = (chunkInSecond + 1) % self.chunksInSecond
if volume >= self.volumeTreshold: # The chunk is loud enough
if not self.recording: # Start recording
# ToDo: check inputStream.get_time(), latency etc. to provide exact time stamp for file naming
self.fileName = strftime(self.fileNameFormat)
self.logger.info(f"{self.fileName} recording started")
self.recording = True
self.sample = b''
self.localMaxVolume = volume
self.audioFileLength = 0
elif volume > self.localMaxVolume:
self.localMaxVolume = volume
self.sampleLength = 0
chunksOfSilence = 0
self.sample += data
self.saveSample()
elif self.recording: # Check for stop recording
self.sample += data
chunksOfSilence += 1
if not self.sampleLength and chunksOfSilence > self.chunksOfFadeout: # Enough silence for a trail
self.sampleLength = len(
self.sample) # Removing extra silence at the end
if chunksOfSilence > self.chunksToStop: # Enough silence to stop recording
self.saveSample() # Stopping recording
if self.quitAfterRecording:
self.inLoop = False
except Exception as e:
self.logger.warning(f"Processing error: {(type(e).__name__)}: {e}")
except KeyboardInterrupt:
self.logger.warning("Ctrl-C detected at input, exiting")
self.inLoop = False
self.saveSample()
self.closeInputStream()
self.closeOutputStream()
self.logger.info("Done")
def commandConsole(self) -> None:
'''Runs in a separate thread to provide a command line operation adjustments.'''
try:
while self.inLoop:
inp = input().split(' ')
command = inp[0].lower()
if 'help'.startswith(command):
print(
"""\nAvailable console commands (first letter is enough):
Help - Show this information
EXit/Quit - Exit the program immediately
Last - Exit the program after completion of the current file
Volume - Print the current mean volume level
Monitor [on/off] - Show or toggle monitor status
Threshold [value] - Show or set the volume threshold level\n""")
elif 'exit'.startswith(
command) or command == 'x' or 'quit'.startswith(
command):
self.logger.info("Exiting")
self.inLoop = False
elif 'volume'.startswith(command):
print(f"{mean(self.lastSecondVolumes):.2f}%"
) # Using print for non-functional logging
elif 'monitor'.startswith(command):
if len(inp) < 2:
print(f"Monitor is {'ON' if self.monitor else 'OFF'}"
) # Using print for non-functional logging
else:
self.monitor = inp[1].lower().strip() in ('true',
'yes', 'on',
'1')
self.logger.info(
f"Monitor is set to {'ON' if self.monitor else 'OFF'}"
)
elif 'last'.startswith(command):
if self.recording:
self.quitAfterRecording = True
self.logger.info(
"Going to exit after the end of the recording")
else:
self.logger.info("Exiting")
self.inLoop = False
elif 'threshold'.startswith(command):
if len(inp) < 2:
print(
f"Current volume treshold: {self.volumeTreshold:.2f}%"
) # Using print for non-functional logging
else:
try:
self.volumeTreshold = float(inp[1])
if not 0 <= self.volumeTreshold <= 100:
raise ValueError()
self.logger.info(
f"New volume treshold: {self.volumeTreshold:.2f}%"
)
except ValueError:
print("Bad value, expected 0-100"
) # Using print for non-functional logging
except EOFError:
self.logger.warning("Console EOF detected")
except Exception as e:
self.logger.warning(
f"Console error: {type(e).__name__}: {e}\n{format_exc()}")
self.inLoop = False
except KeyboardInterrupt:
self.logger.warning("Ctrl-C detected at console, exiting")
self.inLoop = False
def sigTerm(self, _signum: int, _frame: FrameType) -> None:
'''SIGTERM handler.'''
self.logger.warning("SIGTERM caught, exiting")
self.inLoop = False