| # Copyright 2015 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 re |
| |
| from autotest_lib.client.bin import utils |
| from autotest_lib.client.common_lib import error |
| |
| |
| def supports_720p(): |
| """Checks if 720p capture supported. |
| |
| @returns: True if 720p supported, false if VGA is supported. |
| @raises: TestError if neither 720p nor VGA are supported. |
| """ |
| cmd = 'lsusb -v' |
| # Get usb devices and make output a string with no newline marker. |
| usb_devices = utils.system_output(cmd, ignore_status=True).splitlines() |
| usb_devices = ''.join(usb_devices) |
| |
| # Check if 720p resolution supported. |
| if re.search(r'\s+wWidth\s+1280\s+wHeight\s+720', usb_devices): |
| return True |
| # The device should support at least VGA. |
| # Otherwise the cam must be broken. |
| if re.search(r'\s+wWidth\s+640\s+wHeight\s+480', usb_devices): |
| return False |
| # This should not happen. |
| raise error.TestFail( |
| 'Could not find any cameras reporting ' |
| 'either VGA or 720p in lsusb output: %s' % usb_devices) |
| |
