1 # Copyright 2013 The Chromium Authors. All rights reserved. 2 # Use of this source code is governed by a BSD-style license that can be 3 # found in the LICENSE file. 4 5 from metrics import cpu 6 from metrics import media 7 from metrics import system_memory 8 from metrics import power 9 from telemetry.page import page_measurement 10 11 12 class Media(page_measurement.PageMeasurement): 13 """The MediaMeasurement class gathers media-related metrics on a page set. 14 15 Media metrics recorded are controlled by metrics/media.js. At the end of the 16 test each metric for every media element in the page are reported. 17 """ 18 19 def __init__(self): 20 super(Media, self).__init__('RunMediaMetrics') 21 self._media_metric = None 22 # Used to add browser power and CPU metrics to results per test. 23 self._add_browser_metrics = False 24 self._cpu_metric = None 25 self._memory_metric = None 26 self._power_metric = power.PowerMetric() 27 28 def results_are_the_same_on_every_page(self): 29 """Results can vary from page to page based on media events taking place.""" 30 return False 31 32 def CustomizeBrowserOptions(self, options): 33 # Needed to run media actions in JS on touch-based devices as on Android. 34 options.AppendExtraBrowserArgs( 35 '--disable-gesture-requirement-for-media-playback') 36 power.PowerMetric.CustomizeBrowserOptions(options) 37 38 def DidNavigateToPage(self, page, tab): 39 """Override to do operations right after the page is navigated.""" 40 self._media_metric = media.MediaMetric(tab) 41 self._media_metric.Start(page, tab) 42 43 # Reset to false for every page. 44 self._add_browser_metrics = (page.add_browser_metrics 45 if hasattr(page, 'add_browser_metrics') else False) 46 47 if self._add_browser_metrics: 48 self._cpu_metric = cpu.CpuMetric(tab.browser) 49 self._cpu_metric.Start(page, tab) 50 self._memory_metric = system_memory.SystemMemoryMetric(tab.browser) 51 self._memory_metric.Start(page, tab) 52 self._power_metric.Start(page, tab) 53 54 def MeasurePage(self, page, tab, results): 55 """Measure the page's performance.""" 56 self._media_metric.Stop(page, tab) 57 trace_name = self._media_metric.AddResults(tab, results) 58 59 if self._add_browser_metrics: 60 self._cpu_metric.Stop(page, tab) 61 self._memory_metric.Stop(page, tab) 62 self._power_metric.Stop(page, tab) 63 self._cpu_metric.AddResults(tab, results, trace_name=trace_name) 64 exclude_metrics = ['WorkingSetSizePeak', 'SystemCommitCharge', 'VMPeak', 65 'VM'] 66 self._memory_metric.AddResults(tab, results, 67 trace_name=trace_name, 68 exclude_metrics=exclude_metrics) 69 self._power_metric.AddResults(tab, results) 70 71
