blob: 57ac9889c35b49890ad5e5e668ef254442000e2e [file] [log] [blame]
# Copyright (c) 2012 The Chromium 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, time
from autotest_lib.server import test
from autotest_lib.client.common_lib import error
# After connecting/disconnecting the USB headset, we wait a while for the event
# to be discovered, and CRAS to switch the output device.
class audiovideo_AudioRoutingUSB(test.test):
version = 1
def get_opened_device(self, host):
"""Returns the opened pcm device under /dev/snd."""
output ='lsof -Fn +D /dev/snd', ignore_status=True).stdout
return parse_pcm_device(output);
def run_once(self, host):
try:'aplay /dev/zero </dev/null >/dev/null 2>&1 &')
finally:'killall aplay')
def run_test_while_audio_is_playing(self, host):
host.servo.set('dut_usb2_prtctl', 'on')
# First disconnect the headset from DUT
host.servo.set('usb_mux_oe2', 'off')
dev1 = self.get_opened_device(host)
# Connect the headset to DUT
host.servo.set('usb_mux_oe2', 'on')
dev2 = self.get_opened_device(host)
# Disconnect the headset from DUT
host.servo.set('usb_mux_oe2', 'off')
dev3 = self.get_opened_device(host)'dev1: %s, dev2: %s, dev3:%s', dev1, dev2, dev3)
if dev1 == dev2:
raise error.TestFail('Same audio device used when the headset is '
'connected. Make sure a USB headset is '
'plugged into DUT_USB (TYPE A/J4), and '
'connected to a USB port on the device')
if dev1 != dev3:
raise error.TestFail('The audio device didn\'t switch back to the '
'original one after the USB headset is '
def parse_pcm_device(input):
Parses the output of lsof command. Returns the pcm device opened.
>>> input = '''
... p1847
... n/dev/snd/pcmC0D0p
... n/dev/snd/controlC0
... n/dev/snd/controlC0
... n/dev/snd/controlC0
... '''
>>> parse_pcm_device(input)
devices = set()
for line in input.split('\n'):
if line and line.startswith('n/dev/snd/pcmC'):
devices.add(line[1:])'opened devices: %s', devices)
if len(devices) != 1:
raise error.TestError('Should open one and only one device')
return devices.pop()