1 # Copyright 2015 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 """This is an audio quality test over headphone using the Chameleon board.""" 6 7 import logging 8 import os 9 import time 10 11 from autotest_lib.client.common_lib import error 12 from autotest_lib.client.cros.audio import audio_test_data 13 from autotest_lib.client.cros.chameleon import audio_test_utils 14 from autotest_lib.client.cros.chameleon import chameleon_audio_ids 15 from autotest_lib.client.cros.chameleon import chameleon_audio_helper 16 from autotest_lib.server.cros.audio import audio_test 17 18 19 class audio_MediaBasicVerification(audio_test.AudioTest): 20 """Server side audio quality test over 3.5 headphones. 21 22 This test talks to a Chameleon board and a Cros device to verify 23 headphone audio quality of the Cros device. 24 25 """ 26 version = 1 27 DELAY_BEFORE_RECORD_SECONDS = 0.5 28 RECORD_SECONDS = 10 29 DELAY_AFTER_BINDING = 0.5 30 31 def run_once(self, host, audio_test_file): 32 chameleon_board = host.chameleon 33 factory = self.create_remote_facade_factory(host) 34 chameleon_board.reset() 35 36 widget_factory = chameleon_audio_helper.AudioWidgetFactory( 37 factory, host) 38 39 source = widget_factory.create_widget( 40 chameleon_audio_ids.CrosIds.HEADPHONE) 41 recorder = widget_factory.create_widget( 42 chameleon_audio_ids.ChameleonIds.LINEIN) 43 binder = widget_factory.create_binder(source, recorder) 44 45 with chameleon_audio_helper.bind_widgets(binder): 46 # Checks the node selected by cras is correct. 47 time.sleep(self.DELAY_AFTER_BINDING) 48 audio_facade = factory.create_audio_facade() 49 50 audio_test_utils.dump_cros_audio_logs( 51 host, audio_facade, self.resultsdir, 'after_binding') 52 53 output_nodes, _ = audio_facade.get_selected_node_types() 54 if output_nodes != ['HEADPHONE']: 55 raise error.TestFail( 56 '%s rather than headphone is selected on Cros ' 57 'device' % output_nodes) 58 59 # Starts playing, waits for some time, and then starts recording. 60 # This is to avoid artifact caused by codec initialization. 61 logging.info('Start playing %s on Cros device', 62 audio_test_file) 63 browser_facade = factory.create_browser_facade() 64 tab_descriptor = browser_facade.new_tab(audio_test_file) 65 66 time.sleep(self.DELAY_BEFORE_RECORD_SECONDS) 67 logging.info('Start recording from Chameleon.') 68 recorder.start_recording() 69 70 time.sleep(self.RECORD_SECONDS) 71 72 recorder.stop_recording() 73 logging.info('Stopped recording from Chameleon.') 74 browser_facade.close_tab(tab_descriptor) 75 76 audio_test_utils.dump_cros_audio_logs( 77 host, audio_facade, self.resultsdir, 'after_recording') 78 79 recorder.read_recorded_binary() 80 logging.info('Read recorded binary from Chameleon.') 81 82 recorded_file = os.path.join(self.resultsdir, 'recorded.raw') 83 logging.info('Saving recorded data to %s', recorded_file) 84 recorder.save_file(recorded_file) 85 86 # Removes the beginning of recorded data. This is to avoid artifact 87 # caused by Chameleon codec initialization in the beginning of 88 # recording. 89 recorder.remove_head(0.5) 90 91 # Removes noise by a lowpass filter. 92 recorder.lowpass_filter(4000) 93 recorded_file = os.path.join(self.resultsdir, 'recorded_filtered.raw') 94 logging.info('Saving filtered data to %s', recorded_file) 95 recorder.save_file(recorded_file) 96 97 # Compares data by frequency. Headphone audio signal has gone through 98 # analog processing. This suffers from codec artifacts and noise on the 99 # path. Comparing data by frequency is more robust than comparing by 100 # correlation, which is suitable for fully-digital audio path like USB 101 # and HDMI. 102 audio_test_utils.check_recorded_frequency( 103 audio_test_data.MEDIA_HEADPHONE_TEST_FILE, 104 recorder, check_anomaly=True) 105
