146 lines
5.5 KiB
Python
146 lines
5.5 KiB
Python
# Copyright 2019 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import abc
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import logging
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import time
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from autotest_lib.client.bin import utils
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from autotest_lib.client.common_lib.cros import chrome
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from autotest_lib.client.cros.audio import audio_helper
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from autotest_lib.client.cros.input_playback import keyboard
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from autotest_lib.client.cros.power import power_test
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class power_VideoTest(power_test.power_Test):
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"""Optional base class for power related video tests."""
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version = 1
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# Ram disk location to download video file.
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# We use ram disk to avoid power hit from network / disk usage.
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_RAMDISK = '/tmp/ramdisk'
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# Time in seconds to wait after set up before starting each video.
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_WAIT_FOR_IDLE = 15
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# Time in seconds to measure power per video file.
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_MEASUREMENT_DURATION = 120
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# Chrome arguments to disable HW video decode
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_DISABLE_HW_VIDEO_DECODE_ARGS = '--disable-accelerated-video-decode'
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def initialize(self, seconds_period=3, pdash_note='',
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force_discharge=False):
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"""Create and mount ram disk to download video."""
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super(power_VideoTest, self).initialize(
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seconds_period=seconds_period, pdash_note=pdash_note,
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force_discharge=force_discharge)
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utils.run('mkdir -p %s' % self._RAMDISK)
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# Don't throw an exception on errors.
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result = utils.run('mount -t ramfs -o context=u:object_r:tmpfs:s0 '
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'ramfs %s' % self._RAMDISK, ignore_status=True)
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if result.exit_status:
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logging.info('cannot mount ramfs with context=u:object_r:tmpfs:s0,'
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' trying plain mount')
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# Try again without selinux options. This time fail on error.
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utils.run('mount -t ramfs ramfs %s' % self._RAMDISK)
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audio_helper.set_volume_levels(10, 10)
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@abc.abstractmethod
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def _prepare_video(self, cr, url):
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"""Prepare browser session before playing video.
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@param cr: Autotest Chrome instance.
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@param url: url of video file to play.
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"""
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raise NotImplementedError()
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@abc.abstractmethod
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def _start_video(self, cr, url):
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"""Open the video and play it.
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@param cr: Autotest Chrome instance.
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@param url: url of video file to play.
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"""
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raise NotImplementedError()
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@abc.abstractmethod
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def _teardown_video(self, cr, url):
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"""Teardown browser session after playing video.
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@param cr: Autotest Chrome instance.
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@param url: url of video file to play.
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"""
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raise NotImplementedError()
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def _calculate_dropped_frame_percent(self, tab):
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"""Calculate percent of dropped frame.
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@param tab: tab object that played video in Autotest Chrome instance.
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"""
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decoded_frame_count = tab.EvaluateJavaScript(
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"document.getElementsByTagName"
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"('video')[0].webkitDecodedFrameCount")
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dropped_frame_count = tab.EvaluateJavaScript(
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"document.getElementsByTagName"
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"('video')[0].webkitDroppedFrameCount")
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if decoded_frame_count != 0:
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dropped_frame_percent = \
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100.0 * dropped_frame_count / decoded_frame_count
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else:
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logging.error("No frame is decoded. Set drop percent to 100.")
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dropped_frame_percent = 100.0
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logging.info("Decoded frames=%d, dropped frames=%d, percent=%f",
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decoded_frame_count, dropped_frame_count, dropped_frame_percent)
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return dropped_frame_percent
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def run_once(self, videos=None, secs_per_video=_MEASUREMENT_DURATION,
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use_hw_decode=True):
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"""run_once method.
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@param videos: list of tuple of tagname and video url to test.
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@param secs_per_video: time in seconds to play video and measure power.
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@param use_hw_decode: if False, disable hw video decoding.
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"""
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extra_browser_args = []
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if not use_hw_decode:
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extra_browser_args.append(self._DISABLE_HW_VIDEO_DECODE_ARGS)
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with chrome.Chrome(extra_browser_args=extra_browser_args,
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init_network_controller=True) as self.cr:
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tab = self.cr.browser.tabs.New()
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tab.Activate()
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# Just measure power in full-screen.
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fullscreen = tab.EvaluateJavaScript('document.webkitIsFullScreen')
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if not fullscreen:
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with keyboard.Keyboard() as keys:
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keys.press_key('f4')
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self.start_measurements()
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idle_start = time.time()
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for name, url in videos:
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self._prepare_video(self.cr, url)
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time.sleep(self._WAIT_FOR_IDLE)
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logging.info('Playing video: %s', name)
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self._start_video(self.cr, url)
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self.checkpoint_measurements('idle', idle_start)
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loop_start = time.time()
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time.sleep(secs_per_video)
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self.checkpoint_measurements(name, loop_start)
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idle_start = time.time()
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self.keyvals[name + '_dropped_frame_percent'] = \
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self._calculate_dropped_frame_percent(tab)
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self._teardown_video(self.cr, url)
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def cleanup(self):
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"""Unmount ram disk."""
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utils.run('umount %s' % self._RAMDISK)
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super(power_VideoTest, self).cleanup()
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