111 lines
4.5 KiB
Python
111 lines
4.5 KiB
Python
# Copyright 2015 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""This is an audio quality test over headphone using the Chameleon board."""
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import logging
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import os
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import time
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from autotest_lib.client.common_lib import error
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from autotest_lib.client.cros.audio import audio_test_data
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from autotest_lib.client.cros.chameleon import audio_test_utils
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from autotest_lib.client.cros.chameleon import chameleon_audio_ids
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from autotest_lib.client.cros.chameleon import chameleon_audio_helper
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from autotest_lib.server.cros.audio import audio_test
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from autotest_lib.server.cros.multimedia import remote_facade_factory
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class audio_MediaBasicVerification(audio_test.AudioTest):
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"""Server side audio quality test over 3.5 headphones.
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This test talks to a Chameleon board and a Cros device to verify
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headphone audio quality of the Cros device.
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"""
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version = 1
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DELAY_BEFORE_RECORD_SECONDS = 0.5
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RECORD_SECONDS = 10
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DELAY_AFTER_BINDING = 0.5
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UNSUPPORTED_BOARD_TYPES = ['CHROMEBIT']
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def run_once(self, host, audio_test_file):
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"""Runs MediaBasicVerification test."""
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if host.get_board_type() in self.UNSUPPORTED_BOARD_TYPES:
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raise error.TestNAError(
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'DUT is not supported for this scenario. Skipping test.')
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chameleon_board = host.chameleon
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factory = remote_facade_factory.RemoteFacadeFactory(
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host, results_dir=self.resultsdir)
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chameleon_board.setup_and_reset(self.outputdir)
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widget_factory = chameleon_audio_helper.AudioWidgetFactory(
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factory, host)
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source = widget_factory.create_widget(
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chameleon_audio_ids.CrosIds.HEADPHONE)
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recorder = widget_factory.create_widget(
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chameleon_audio_ids.ChameleonIds.LINEIN)
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binder = widget_factory.create_binder(source, recorder)
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with chameleon_audio_helper.bind_widgets(binder):
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# Checks the node selected by cras is correct.
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time.sleep(self.DELAY_AFTER_BINDING)
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audio_facade = factory.create_audio_facade()
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audio_test_utils.dump_cros_audio_logs(
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host, audio_facade, self.resultsdir, 'after_binding')
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audio_test_utils.check_audio_nodes(
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audio_facade,
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(audio_test_utils.get_headphone_node(host), None))
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# Starts playing, waits for some time, and then starts recording.
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# This is to avoid artifact caused by codec initialization.
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logging.info('Start playing %s on Cros device',
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audio_test_file)
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browser_facade = factory.create_browser_facade()
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tab_descriptor = browser_facade.new_tab(audio_test_file)
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time.sleep(self.DELAY_BEFORE_RECORD_SECONDS)
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logging.info('Start recording from Chameleon.')
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recorder.start_recording()
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time.sleep(self.RECORD_SECONDS)
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recorder.stop_recording()
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logging.info('Stopped recording from Chameleon.')
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browser_facade.close_tab(tab_descriptor)
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audio_test_utils.dump_cros_audio_logs(
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host, audio_facade, self.resultsdir, 'after_recording')
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recorder.read_recorded_binary()
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logging.info('Read recorded binary from Chameleon.')
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recorded_file = os.path.join(self.resultsdir, 'recorded.raw')
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logging.info('Saving recorded data to %s', recorded_file)
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recorder.save_file(recorded_file)
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# Removes the beginning of recorded data. This is to avoid artifact
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# caused by Chameleon codec initialization in the beginning of
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# recording.
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recorder.remove_head(0.5)
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# Removes noise by a lowpass filter.
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recorder.lowpass_filter(4000)
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recorded_file = os.path.join(self.resultsdir, 'recorded_filtered.raw')
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logging.info('Saving filtered data to %s', recorded_file)
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recorder.save_file(recorded_file)
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# Compares data by frequency. Headphone audio signal has gone through
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# analog processing. This suffers from codec artifacts and noise on the
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# path. Comparing data by frequency is more robust than comparing by
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# correlation, which is suitable for fully-digital audio path like USB
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# and HDMI.
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audio_test_utils.check_recorded_frequency(
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audio_test_data.MEDIA_HEADPHONE_TEST_FILE,
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recorder, check_anomaly=True)
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