FreeDATA/tools/list_audio_devices.py

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#!/usr/bin/python3
# -*- coding: utf-8 -*-
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import crcengine
import sounddevice as sd
import multiprocessing
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def list_audio_devices():
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input_audio = []
output_audio = []
fetch_audio_devices(input_audio,output_audio)
print ("-------------------- Input (RX) Audio Devices ----------------------------")
print ("[ID]\t[CRC]\t " + "[Name]".ljust(50) + "[API]")
for device in (input_audio):
print(str(device["native_index"]) + "\t" + device["id"] + "\t" + device["name"].strip().ljust(50) + device["api"])
print ("\n-------------------- Output (TX) Audio Devices ----------------------------")
print ("[ID]\t[CRC]\t " + "[Name]".ljust(50) + "[API]")
for device in (output_audio):
print(str(device["native_index"]) + "\t" + device["id"] + " \t " + device["name"].strip().ljust(50) + device["api"])
def device_crc(device) -> str:
crc_hwid = crc_algorithm(bytes(f"{device['name']}.{device['hostapi']}", encoding="utf-8"))
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crc_hwid = crc_hwid.to_bytes(2, byteorder="big")
crc_hwid = crc_hwid.hex()
return crc_hwid
def get_audio_devices():
"""
return list of input and output audio devices in own process to avoid crashes of portaudio on raspberry pi
also uses a process data manager
"""
# we need to run this on Windows for multiprocessing support
# multiprocessing.freeze_support()
# multiprocessing.get_context("spawn")
# we need to reset and initialize sounddevice before running the multiprocessing part.
# If we are not doing this at this early point, not all devices will be displayed
sd._terminate()
sd._initialize()
# log.debug("[AUD] get_audio_devices")
with multiprocessing.Manager() as manager:
proxy_input_devices = manager.list()
proxy_output_devices = manager.list()
# print(multiprocessing.get_start_method())
proc = multiprocessing.Process(
target=fetch_audio_devices, args=(proxy_input_devices, proxy_output_devices)
)
proc.start()
proc.join()
# additional logging for audio devices
# log.debug("[AUD] get_audio_devices: input_devices:", list=f"{proxy_input_devices}")
# log.debug("[AUD] get_audio_devices: output_devices:", list=f"{proxy_output_devices}")
return list(proxy_input_devices), list(proxy_output_devices)
def fetch_audio_devices(input_devices, output_devices):
"""
get audio devices from portaudio
Args:
input_devices: proxy variable for input devices
output_devices: proxy variable for output devices
Returns:
"""
devices = sd.query_devices(device=None, kind=None)
for index, device in enumerate(devices):
# Use a try/except block because Windows doesn't have an audio device range
try:
name = device["name"]
# Ignore some Flex Radio devices to make device selection simpler
if name.startswith("DAX RESERVED") or name.startswith("DAX IQ"):
continue
max_output_channels = device["max_output_channels"]
max_input_channels = device["max_input_channels"]
except KeyError:
continue
except Exception as err:
print(err)
max_input_channels = 0
max_output_channels = 0
if max_input_channels > 0:
hostapi_name = sd.query_hostapis(device['hostapi'])['name']
new_input_device = {"id": device_crc(device),
"name": device['name'],
"api": hostapi_name,
"native_index":index}
# check if device not in device list
if new_input_device not in input_devices:
input_devices.append(new_input_device)
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if max_output_channels > 0:
hostapi_name = sd.query_hostapis(device['hostapi'])['name']
new_output_device = {"id": device_crc(device),
"name": device['name'],
"api": hostapi_name,
"native_index":index}
# check if device not in device list
if new_output_device not in output_devices:
output_devices.append(new_output_device)
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crc_algorithm = crcengine.new("crc16-ccitt-false") # load crc16 library
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list_audio_devices()