100 lines
3.2 KiB
Python
100 lines
3.2 KiB
Python
from typing import Any, Dict, List, Optional, Tuple
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import sounddevice as sd
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from helpers.os_environment import isLinux, isMacOS, isWindows
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import os
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os.environ["PYGAME_HIDE_SUPPORT_PROMPT"] = "hide"
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os.putenv('SDL_AUDIODRIVER', 'pulseaudio')
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import pygame._sdl2 as sdl2
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from pygame import mixer
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import glob
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if isWindows():
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from serial.tools.list_ports_windows import comports
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# TODO: https://wiki.libsdl.org/FAQUsingSDL maybe try setting some of these env variables for choosing different host APIs?
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WINDOWS_APIS = ["Windows DirectSound"]
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class DeviceManager:
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@classmethod
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def _isOutput(cls, device: Dict[str, Any]) -> bool:
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return device["max_output_channels"] > 0
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@classmethod
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def _isHostAPI(cls, host_api) -> bool:
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return host_api
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@classmethod
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def _getSDAudioDevices(cls):
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# To update the list of devices
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# Sadly this only works on Windows. Linux hangs, MacOS crashes.
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if isWindows():
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sd._terminate()
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sd._initialize()
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devices: sd.DeviceList = sd.query_devices()
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return devices
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@classmethod
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def getAudioOutputs(cls) -> Tuple[List[Dict]]:
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host_apis = list(sd.query_hostapis())
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devices: sd.DeviceList = cls._getSDAudioDevices()
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for host_api_id in range(len(host_apis)):
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# Linux SDL uses PortAudio, which SoundDevice doesn't find. So mark all as unsable.
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if (isWindows() and host_apis[host_api_id]["name"] not in WINDOWS_APIS) or (isLinux()):
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host_apis[host_api_id]["usable"] = False
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else:
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host_apis[host_api_id]["usable"] = True
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host_api_devices = (
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device for device in devices if device["hostapi"] == host_api_id
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)
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outputs: List[Dict] = list(filter(cls._isOutput, host_api_devices))
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outputs = sorted(outputs, key=lambda k: k["name"])
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host_apis[host_api_id]["output_devices"] = outputs
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return host_apis
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@classmethod
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def getAudioDevices(cls) -> List[str]:
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mixer.init(44100, -16, 2, 1024)
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is_capture = 0 # zero to request playback devices, non-zero to request recording devices
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num = sdl2.get_num_audio_devices(is_capture)
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names = [str(sdl2.get_audio_device_name(i, is_capture), encoding="utf-8") for i in range(num)]
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mixer.quit()
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return names
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@classmethod
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def getSerialPorts(cls) -> List[Optional[str]]:
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"""Lists serial port names
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:raises EnvironmentError:
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On unsupported or unknown platforms
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:returns:
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A list of the serial ports available on the system
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"""
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if isWindows():
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ports = [port.device for port in comports()]
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elif isLinux():
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# this excludes your current terminal "/dev/tty"
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ports = glob.glob("/dev/tty[A-Za-z]*")
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elif isMacOS():
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ports = glob.glob("/dev/tty.*")
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else:
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raise EnvironmentError("Unsupported platform")
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valid: List[str] = ports
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result: List[Optional[str]] = []
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if len(valid) > 0:
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valid.sort()
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result.append(None) # Add the None option
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result.extend(valid)
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return result
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