| # Copyright (c) 2012 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. |
| |
| import logging |
| import os |
| |
| from autotest_lib.client.bin import test, utils |
| from autotest_lib.client.common_lib import error |
| from autotest_lib.client.common_lib.cros import chrome |
| from autotest_lib.client.cros.audio import audio_helper |
| from autotest_lib.client.cros.audio import cmd_utils |
| from autotest_lib.client.cros.audio import cras_utils |
| from autotest_lib.client.cros.audio import sox_utils |
| |
| TEST_DURATION = 15 |
| |
| class desktopui_AudioFeedback(audio_helper.chrome_rms_test): |
| """Verifies if youtube playback can be captured.""" |
| version = 1 |
| |
| def play_video(self, tab, video_url): |
| """Plays a Youtube video to record audio samples. |
| |
| @param tab: the tab to load and play the video. |
| """ |
| tab.Navigate(video_url) |
| |
| def player_is_ready(): |
| return tab.EvaluateJavaScript('typeof player != "undefined"') |
| |
| utils.poll_for_condition( |
| condition=player_is_ready, |
| exception=error.TestError('Failed to load the Youtube player')) |
| |
| # Seek to 60 seconds to skip the silence in the beginning. |
| tab.ExecuteJavaScript('player.seekTo(60, true)') |
| tab.ExecuteJavaScript('player.playVideo()') |
| |
| # Make sure the video is playing |
| def get_current_time(): |
| return tab.EvaluateJavaScript('player.getCurrentTime()') |
| |
| old_time = get_current_time() |
| utils.poll_for_condition( |
| condition=lambda: get_current_time() > old_time, |
| exception=error.TestError('Video is not played until timeout')) |
| |
| |
| def run_once(self): |
| """Entry point of this test.""" |
| self.chrome.browser.platform.SetHTTPServerDirectories(self.bindir) |
| |
| video_url = self.chrome.browser.platform.http_server.UrlOf( |
| os.path.join(self.bindir, 'youtube.html')) |
| logging.info('Playing back youtube media file %s.', video_url) |
| noise_file = os.path.join(self.resultsdir, "noise.wav") |
| recorded_file = os.path.join(self.resultsdir, "recorded.wav") |
| loopback_file = os.path.join(self.resultsdir, "loopback.wav") |
| |
| # Record a sample of "silence" to use as a noise profile. |
| cras_utils.capture(noise_file, duration=3) |
| |
| # Play a video and record the audio output |
| self.play_video(self.chrome.browser.tabs[0], video_url) |
| |
| p1 = cmd_utils.popen(cras_utils.capture_cmd( |
| recorded_file, duration=TEST_DURATION)) |
| p2 = cmd_utils.popen(cras_utils.loopback_cmd( |
| loopback_file, duration=TEST_DURATION)) |
| |
| cmd_utils.wait_and_check_returncode(p1, p2) |
| |
| # See if we recorded something |
| loopback_stats = [audio_helper.get_channel_sox_stat( |
| loopback_file, i) for i in (1, 2)] |
| logging.info('loopback stats: %s', [str(s) for s in loopback_stats]) |
| rms_value = audio_helper.reduce_noise_and_get_rms( |
| recorded_file, noise_file)[0] |
| |
| self.write_perf_keyval({'rms_value': rms_value}) |