blob: 7a593569ab32a874e6fee874e0e0894adcd84e78 [file] [log] [blame]
# Copyright 2018 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import logging
import os
import utils
from autotest_lib.client.common_lib import error
from import audio_helper
from import cmd_utils
from import cras_utils
from autotest_lib.client.cros.enterprise import enterprise_policy_base
from autotest_lib.client.cros.input_playback import input_playback
class policy_AudioOutputAllowed(
version = 1
POLICY_NAME = 'AudioOutputAllowed'
# How long (sec) to capture output for
'NotSet_Allow': None,
'True_Allow': True,
'False_Block': False
def initialize(self, **kwargs):
"""Initialize objects for test."""
super(policy_AudioOutputAllowed, self).initialize(**kwargs)
def wait_for_active_stream_count(self, expected_count):
Waits for there to be the expected number of audio streams.
@param expected_count: Number of audio streams to wait for.
@raises error.TestError: if there is a timeout before the there is the
desired number of audio streams.
lambda: cras_utils.get_active_stream_count() == expected_count,
'Timeout waiting active stream count to become %d' %
def is_muted(self):
Returns mute status of system.
@returns: True if system muted, False if not.
CTC_GREP_FOR_MUTED = 'cras_test_client --dump_server_info | grep muted'
output = utils.system_output(CTC_GREP_FOR_MUTED)
muted = output.split(':')[-1].strip()
return muted == MUTE_STATUS
def _test_audio_disabled(self, policy_value):
Verify the AudioOutputAllowed policy behaves as expected.
Generate and play a sample audio file. When enabled, the difference
between the muted and unmuted RMS should be greater than 0.75. When
disabled, the RMS difference should be less than 0.05.
@param policy_value: policy value for this case.
@raises error.TestFail: In the case where the audio behavior
does not match the policy value.
audio_allowed = policy_value or policy_value is None
RAW_FILE = os.path.join(self.enterprise_dir, 'test_audio.raw')
noise_file = os.path.join(self.resultsdir, 'noise.wav')
recorded_file = os.path.join(self.resultsdir, 'recorded-cras.raw')
recorded_rms = []
# Record a sample of silence to use as a noise profile.
cras_utils.capture(noise_file, duration=2)'NOISE: %s', audio_helper.get_rms(noise_file))
# Get two RMS samples: one when muted and one when not
for muted in [False, True]:
# Play the audio file and capture the output
p = cmd_utils.popen(cras_utils.playback_cmd(RAW_FILE))
cras_utils.capture(recorded_file, duration=self.SAMPLE_DURATION)
if p.poll() is not None:
raise error.TestError('Audio playback stopped prematurely')
rms_value = audio_helper.reduce_noise_and_get_rms(
recorded_file, noise_file)[0]'muted (%s): %s' % (muted, rms_value))
rms_diff = recorded_rms[0] - recorded_rms[1]
self.write_perf_keyval({'rms_diff': rms_diff})
if audio_allowed:
if rms_diff < 0.4:
raise error.TestFail('RMS difference not large enough between '
'mute and ummute: %s' % rms_diff)
if abs(rms_diff) > 0.05:
raise error.TestFail('RMS difference too wide while audio '
'disabled: %s' % rms_diff)
def _test_unmute_disabled(self, policy_value):
Verify AudioOutputAllowed does not allow unmuting when disabled.
Attempt to unmute the system with CRAS and check the system state
@param policy_value: policy value for this case.
@raises error.TestFail: In the case where the audio behavior
does not match the policy value.
audio_allowed = policy_value or policy_value is None
if not audio_allowed and not self.is_muted():
raise error.TestFail('System should be muted, but is not')
elif audio_allowed and self.is_muted():
raise error.TestFail('System is muted but should not be')
def run_once(self, case):
Setup and run the test configured for the specified test case.
@param case: Name of the test case to run.
case_value = self.TEST_CASES[case]
self.setup_case(user_policies={self.POLICY_NAME: case_value})