116 lines
4.8 KiB
Python
116 lines
4.8 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 a server side internal microphone test 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.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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class audio_AudioBasicInternalMicrophone(audio_test.AudioTest):
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"""Server side internal microphone audio test.
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This test talks to a Chameleon board and a Cros device to verify
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internal mic audio function 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 = 9
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DELAY_AFTER_BINDING = 0.5
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def run_once(self):
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"""Runs Basic Audio Microphone test."""
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if not audio_test_utils.has_internal_microphone(self.host):
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return
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# The small volume is to avoid distortion when played on Chameleon.
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golden_file = audio_test_data.GenerateAudioTestData(
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path=os.path.join(self.bindir, 'fix_1330_16.raw'),
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duration_secs=10,
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frequencies=[1330, 1330],
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volume_scale=0.1)
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source = self.widget_factory.create_widget(
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chameleon_audio_ids.ChameleonIds.LINEOUT)
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sink = self.widget_factory.create_widget(
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chameleon_audio_ids.PeripheralIds.SPEAKER)
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binder = self.widget_factory.create_binder(source, sink)
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recorder = self.widget_factory.create_widget(
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chameleon_audio_ids.CrosIds.INTERNAL_MIC)
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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_test_utils.dump_cros_audio_logs(
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self.host, self.facade, self.resultsdir, 'after_binding')
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# Selects and checks the node selected by cras is correct.
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audio_test_utils.check_and_set_chrome_active_node_types(
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self.facade, None,
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audio_test_utils.get_internal_mic_node(self.host))
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logging.info('Setting playback data on Chameleon')
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source.set_playback_data(golden_file)
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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 chameleon codec initialization
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# in the beginning of playback.
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logging.info('Start playing %s from Chameleon', golden_file.path)
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source.start_playback()
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time.sleep(self.DELAY_BEFORE_RECORD_SECONDS)
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logging.info('Start recording from Cros device.')
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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 Cros device.')
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audio_test_utils.dump_cros_audio_logs(
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self.host, self.facade, self.resultsdir, 'after_recording')
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recorder.read_recorded_binary()
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logging.info('Read recorded binary from Cros device.')
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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 Cros device codec initialization in the beginning of
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# recording.
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recorder.remove_head(1.0)
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# Removes noise by a lowpass filter.
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recorder.lowpass_filter(1500)
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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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# Cros device only records one channel data. Here we set the channel map
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# of the recorder to compare the recorded data with left channel of the
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# test data. This is fine as left and right channel of test data are
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# identical.
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recorder.channel_map = [0]
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# Compares data by frequency. Audio signal from Chameleon Line-Out to
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# speaker and finally recorded on Cros device using internal microphone
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# has gone through analog processing and through the air.
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# This suffers from codec artifacts and noise on the path.
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# Comparing data by frequency is more robust than comparing them 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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golden_file, recorder, second_peak_ratio=0.2)
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