Home | History | Annotate | Download | only in video_ChromeRTCHWDecodeUsed 
      1 # Copyright (c) 2014 The Chromium OS 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 import os
      6 
      7 from autotest_lib.client.bin import test
      8 from autotest_lib.client.common_lib import error, file_utils, utils
      9 from autotest_lib.client.common_lib.cros import chrome
     10 from autotest_lib.client.cros.video import histogram_verifier
     11 from autotest_lib.client.cros.video import helper_logger
     12 
     13 
     14 # Chrome flags to use fake camera and skip camera permission.
     15 EXTRA_BROWSER_ARGS = ['--use-fake-device-for-media-stream',
     16                       '--use-fake-ui-for-media-stream']
     17 FAKE_FILE_ARG = '--use-file-for-fake-video-capture="%s"'
     18 DOWNLOAD_BASE = 'http://commondatastorage.googleapis.com/chromiumos-test-assets-public/crowd/'
     19 
     20 HISTOGRAMS_URL = 'chrome://histograms/'
     21 
     22 
     23 class video_ChromeRTCHWDecodeUsed(test.test):
     24     """The test verifies HW Encoding for WebRTC video."""
     25     version = 1
     26 
     27 
     28     def is_skipping_test(self):
     29         """Determine whether this test should skip."""
     30         blacklist = [
     31                 # (board, milestone); None if don't care.
     32 
     33                 # kevin did support hw decode, but not ready in M54 and M55.
     34                 ('kevin', 54), ('kevin', 55),
     35 
     36                 # elm and hana support hw decode since M57.
     37                 ('elm', 56), ('hana', 56),
     38         ]
     39 
     40         entry = (utils.get_current_board(), utils.get_chrome_milestone())
     41         for black_entry in blacklist:
     42             for i, to_match in enumerate(black_entry):
     43                 if to_match and str(to_match) != entry[i]:
     44                     break
     45             else:
     46                 return True
     47 
     48         return False
     49 
     50     def start_loopback(self, cr):
     51         """
     52         Opens WebRTC loopback page.
     53 
     54         @param cr: Autotest Chrome instance.
     55         """
     56         tab = cr.browser.tabs.New()
     57         tab.Navigate(cr.browser.platform.http_server.UrlOf(
     58             os.path.join(self.bindir, 'loopback.html')))
     59         tab.WaitForDocumentReadyStateToBeComplete()
     60 
     61     @helper_logger.video_log_wrapper
     62     def run_once(self, video_name, histogram_name, histogram_bucket_val):
     63         if self.is_skipping_test():
     64             raise error.TestNAError('Skipping test run on this board.')
     65 
     66         # Download test video.
     67         url = DOWNLOAD_BASE + video_name
     68         local_path = os.path.join(self.bindir, video_name)
     69         file_utils.download_file(url, local_path)
     70 
     71         # Start chrome with test flags.
     72         EXTRA_BROWSER_ARGS.append(FAKE_FILE_ARG % local_path)
     73         EXTRA_BROWSER_ARGS.append(helper_logger.chrome_vmodule_flag())
     74         with chrome.Chrome(extra_browser_args=EXTRA_BROWSER_ARGS,
     75                            init_network_controller=True) as cr:
     76             # Open WebRTC loopback page.
     77             cr.browser.platform.SetHTTPServerDirectories(self.bindir)
     78             self.start_loopback(cr)
     79 
     80             # Make sure decode is hardware accelerated.
     81             histogram_verifier.verify(cr, histogram_name, histogram_bucket_val)
     82