Telemetry Test for WebRTC Rendering.

tools/perf/page_sets/webrtc_rendering_measurement.py

+# Copyright 2015 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.
+from telemetry import story
+from telemetry.page import page as page_module
+
+WIDTH = 1280
+HEIGHT = 720
+
+class WebrtcRenderingMeasurementPage(page_module.Page):

[nednguyen, 2015/09/02 16:26:46]

s/WebrtcRenderingMeasurement/WebrtcRendering

[cpaulin (no longer in chrome), 2015/09/16 22:57:05]

Done.

+
+  def __init__(self, url, page_set):
+    super(WebrtcRenderingMeasurementPage, self).__init__(url=url,
+                                                         page_set=page_set)
+    self.webrtc_rendering_measurement = True
+
+  def RunNavigateSteps(self, action_runner):
+    super(WebrtcRenderingMeasurementPage, self).RunNavigateSteps(action_runner)
+    print "#### DEBUG: Starting testCamera script ####"
+    action_runner.ExecuteJavaScript('testCamera([%s, %s]);' % (WIDTH, HEIGHT))
+    action_runner.WaitForJavaScriptCondition('testProgress')
+
+
+class WebrtcRenderingMeasurementPageSet(story.StorySet):
+
+  """ A benchmark of webrtc rendering performance."""
+
+  def __init__(self):
+    super(WebrtcRenderingMeasurementPageSet, self).__init__()
+    self.webrtc_rendering_measurement = True
+
+    url = ('file://../../../chrome/test/data/webrtc_rendering/'
+           'loopback_peerconnection.html')

[phoglund_chromium, 2015/09/02 11:27:45]

You're not supposed to build page sets like this, you're supposed to "record"
them using web page replay and use Telemetry's page set support. Ned, do you
still allow having demo pages like this? See
https://code.google.com/p/chromium/codesearch#chromium/src/tools/perf/page_se...
for an example. In WebRTC we generally host the demo page as an example page on
http://webrtc.github.io/samples/ and record it with wpr.

In general you should construct your measurement so it works on any page with a
WebRTC-backed video element on it. Or maybe it could even work on any video
element regardless of source?

[nednguyen, 2015/09/02 16:26:46]

Telemetry page can have file url (and I indeed prefer this over recorded WPR due
to the fact that we can't record & replay page deterministically all the time). 

For example:
https://code.google.com/p/chromium/codesearch#chromium/src/tools/perf/page_se...

+    self.AddStory(WebrtcRenderingMeasurementPage(url, self))