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"""Utilities to silence ALSA console output."""
# ALSA tends to generate noisy console output. The functions here suppress that
# output by patching the ALSA's error output routine. Heavily inspired by:
# https://stackoverflow.com/a/13453192
import ctypes
import sys
ERROR_HANDLER_FUNC = ctypes.CFUNCTYPE(None, ctypes.c_char_p, ctypes.c_int,
ctypes.c_char_p, ctypes.c_int,
ctypes.c_char_p)
def py_error_handler(filename, line, function, err, fmt):
pass
def disable_error_handler_output():
if sys.platform != 'linux':
return
try:
asound = ctypes.cdll.LoadLibrary('libasound.so')
asound.snd_lib_error_set_handler(ERROR_HANDLER_FUNC(py_error_handler))
except OSError:
pass
def enable_error_handler_output():
if sys.platform != 'linux':
return
try:
asound = ctypes.cdll.LoadLibrary('libasound.so')
asound.snd_lib_error_set_handler(None)
except OSError:
pass
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