174 lines
6.9 KiB
Python
174 lines
6.9 KiB
Python
import audioop
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import math
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import pyaudio
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import discord
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from internal.logger import create_logger
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LOGGER = create_logger(__name__)
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# The size of a 20ms, 48kHz, stereo, 16-bit PCM audio frame.
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# (960 frames * 2 channels * 2 bytes/sample)
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DISCORD_FRAME_SIZE = 3840
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SILENT_FRAME = b'\x00' * DISCORD_FRAME_SIZE
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# noinspection PyUnresolvedReferences
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class AudioStream:
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def __init__(self, _channels: int = 2, _sample_rate: int = 48000, _frames_per_buffer: int = 960,
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_input_device_index: int = None, _output_device_index: int = None, _input: bool = True,
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_output: bool = True, _init_on_startup: bool = True):
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# Corrected frames_per_buffer to 960 to match Discord's 20ms frame size
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self.paInstance_kwargs = {
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'format': pyaudio.paInt16,
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'channels': _channels,
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'rate': _sample_rate,
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'input': _input,
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'output': _output,
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'frames_per_buffer': _frames_per_buffer
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}
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if _input_device_index is not None:
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if _input:
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self.paInstance_kwargs['input_device_index'] = _input_device_index
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else:
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LOGGER.warning("[AudioStream.__init__]:\tInput was not enabled."
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" Reinitialize with '_input=True'")
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if _output_device_index is not None:
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if _output:
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self.paInstance_kwargs['output_device_index'] = _output_device_index
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else:
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LOGGER.warning("[AudioStream.__init__]:\tOutput was not enabled."
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" Reinitialize with '_output=True'")
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if _init_on_startup:
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LOGGER.info("Creating PyAudio instance")
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self.paInstance = pyaudio.PyAudio()
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self.stream = None
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if _output_device_index is not None or _input_device_index is not None:
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if _init_on_startup:
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LOGGER.info("Init stream")
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self.init_stream()
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def init_stream(self, _new_output_device_index: int = None, _new_input_device_index: int = None):
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if _new_input_device_index is not None:
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if self.paInstance_kwargs['input']:
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self.paInstance_kwargs['input_device_index'] = _new_input_device_index
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else:
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LOGGER.warning("[AudioStream.init_stream]:\tInput was not enabled when initialized."
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" Reinitialize with '_input=True'")
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if _new_output_device_index is not None:
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if self.paInstance_kwargs['output']:
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self.paInstance_kwargs['output_device_index'] = _new_output_device_index
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else:
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LOGGER.warning("[AudioStream.init_stream]:\tOutput was not enabled when initialized."
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" Reinitialize with '_output=True'")
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self.close_if_open()
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self.stream = self.paInstance.open(**self.paInstance_kwargs)
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def close_if_open(self):
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if self.stream and self.stream.is_active():
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self.stream.stop_stream()
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self.stream.close()
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LOGGER.debug("[ReopenStream.close_if_open]:\t Stream was open; It was closed.")
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def list_devices(self, _display_input_devices: bool = True, _display_output_devices: bool = True):
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LOGGER.info('Getting a list of the devices connected')
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info = self.paInstance.get_host_api_info_by_index(0)
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numdevices = info.get('deviceCount')
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devices = {'Input': {}, 'Output': {}}
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for i in range(0, numdevices):
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device_info = self.paInstance.get_device_info_by_host_api_device_index(0, i)
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if (device_info.get('maxInputChannels')) > 0:
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input_device = device_info.get('name')
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devices['Input'][i] = input_device
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if _display_input_devices:
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LOGGER.debug(f"Input Device id {i} - {input_device}")
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if (device_info.get('maxOutputChannels')) > 0:
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output_device = device_info.get('name')
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devices['Output'][i] = output_device
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if _display_output_devices:
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LOGGER.debug(f"Output Device id {i} - {output_device}")
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return devices
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# noinspection PyUnresolvedReferences
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class NoiseGate(AudioStream):
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def __init__(self, _voice_connection, _noise_gate_threshold: int, **kwargs):
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super(NoiseGate, self).__init__(_init_on_startup=True, **kwargs)
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self.voice_connection = _voice_connection
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self.THRESHOLD = _noise_gate_threshold
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self.NGStream = NoiseGateStream(self)
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def run(self) -> None:
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LOGGER.debug("Starting stream")
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self.stream.start_stream()
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self.core()
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def core(self):
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if self.voice_connection.is_connected() and not self.voice_connection.is_playing():
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LOGGER.debug("Playing stream to discord")
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self.voice_connection.play(self.NGStream)
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async def close(self):
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LOGGER.debug("Closing NoiseGate resources...")
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if self.voice_connection and self.voice_connection.is_connected():
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self.voice_connection.stop()
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self.close_if_open()
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if self.paInstance:
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self.paInstance.terminate()
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LOGGER.debug("NoiseGate resources closed.")
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# noinspection PyUnresolvedReferences
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class NoiseGateStream(discord.AudioSource):
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def __init__(self, noise_gate_instance: NoiseGate):
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super(NoiseGateStream, self).__init__()
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self.noise_gate = noise_gate_instance
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self.NG_fadeout = 12
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self.NG_fadeout_count = 0
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self.process_set_count = 0
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def read(self):
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try:
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if not self.noise_gate.voice_connection.is_connected():
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return SILENT_FRAME
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curr_buffer = self.noise_gate.stream.read(960, exception_on_overflow=False)
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if len(curr_buffer) != DISCORD_FRAME_SIZE:
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return SILENT_FRAME
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buffer_rms = audioop.rms(curr_buffer, 2)
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if buffer_rms > 0:
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buffer_decibel = 20 * math.log10(buffer_rms)
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if self.process_set_count % 10 == 0:
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log_msg = f"[{'Open' if buffer_decibel >= self.noise_gate.THRESHOLD else 'Closed'}]"
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LOGGER.debug(f"[NoiseGate {log_msg}] {buffer_decibel:.2f} dB")
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if buffer_decibel >= self.noise_gate.THRESHOLD:
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self.NG_fadeout_count = self.NG_fadeout
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self.process_set_count += 1
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return bytes(curr_buffer)
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elif self.NG_fadeout_count > 0:
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self.NG_fadeout_count -= 1
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self.process_set_count += 1
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return bytes(curr_buffer)
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return SILENT_FRAME
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except IOError as e:
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LOGGER.error(f"PyAudio IOError in read(): {e}")
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return SILENT_FRAME
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except Exception as e:
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LOGGER.error(f"Unhandled exception in NoiseGateStream.read: {e}", exc_info=True)
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return SILENT_FRAME |