1 # Copyright (c) 2012 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 import logging 6 import os 7 8 from autotest_lib.client.bin import test, utils 9 from autotest_lib.client.common_lib import error 10 from autotest_lib.client.common_lib.cros import chrome 11 from autotest_lib.client.cros.audio import audio_helper 12 from autotest_lib.client.cros.audio import cmd_utils 13 from autotest_lib.client.cros.audio import cras_utils 14 from autotest_lib.client.cros.audio import sox_utils 15 16 TEST_DURATION = 15 17 18 class desktopui_AudioFeedback(audio_helper.chrome_rms_test): 19 """Verifies if youtube playback can be captured.""" 20 version = 1 21 22 def play_video(self, tab, video_url): 23 """Plays a Youtube video to record audio samples. 24 25 @param tab: the tab to load and play the video. 26 """ 27 tab.Navigate(video_url) 28 29 def player_is_ready(): 30 return tab.EvaluateJavaScript('typeof player != "undefined"') 31 32 utils.poll_for_condition( 33 condition=player_is_ready, 34 exception=error.TestError('Failed to load the Youtube player')) 35 36 # Seek to 60 seconds to skip the silence in the beginning. 37 tab.ExecuteJavaScript('player.seekTo(60, true)') 38 tab.ExecuteJavaScript('player.playVideo()') 39 40 # Make sure the video is playing 41 def get_current_time(): 42 return tab.EvaluateJavaScript('player.getCurrentTime()') 43 44 old_time = get_current_time() 45 utils.poll_for_condition( 46 condition=lambda: get_current_time() > old_time, 47 exception=error.TestError('Video is not played until timeout')) 48 49 50 def run_once(self): 51 """Entry point of this test.""" 52 self.chrome.browser.platform.SetHTTPServerDirectories(self.bindir) 53 54 video_url = self.chrome.browser.platform.http_server.UrlOf( 55 os.path.join(self.bindir, 'youtube.html')) 56 logging.info('Playing back youtube media file %s.', video_url) 57 noise_file = os.path.join(self.resultsdir, "noise.wav") 58 recorded_file = os.path.join(self.resultsdir, "recorded.wav") 59 loopback_file = os.path.join(self.resultsdir, "loopback.wav") 60 61 # Record a sample of "silence" to use as a noise profile. 62 cras_utils.capture(noise_file, duration=3) 63 64 # Play a video and record the audio output 65 self.play_video(self.chrome.browser.tabs[0], video_url) 66 67 p1 = cmd_utils.popen(cras_utils.capture_cmd( 68 recorded_file, duration=TEST_DURATION)) 69 p2 = cmd_utils.popen(cras_utils.loopback_cmd( 70 loopback_file, duration=TEST_DURATION)) 71 72 cmd_utils.wait_and_check_returncode(p1, p2) 73 74 # See if we recorded something 75 loopback_stats = [audio_helper.get_channel_sox_stat( 76 loopback_file, i) for i in (1, 2)] 77 logging.info('loopback stats: %s', [str(s) for s in loopback_stats]) 78 rms_value = audio_helper.reduce_noise_and_get_rms( 79 recorded_file, noise_file)[0] 80 81 self.write_perf_keyval({'rms_value': rms_value}) 82
