def warmup(self):
super(alsa_rms_test, self).warmup()
cras_rms_test_setup()
# We need CRAS to initialize the volume and gain.
cras_utils.playback(playback_file="/dev/zero", duration=1)
# CRAS will release the device after 10 seconds.
time.sleep(11)
def start(self, file_path, blocking):
"""Starts recording.
Starts recording subprocess. It can be stopped by calling stop().
@param file_path: The path to the file.
@param blocking: Blocks this call until playback finishes.
"""
self._playback_subprocess = cras_utils.playback(
blocking, playback_file=file_path)
def _playback():
"""Playback using cras utility."""
cras_utils.playback(playback_file=file_path)