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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 a server side internal microphone test using the Chameleon board."""
6
7import logging
8import os
9import time
10
11from autotest_lib.client.cros.audio import audio_test_data
12from autotest_lib.client.cros.audio import cras_configs
13from autotest_lib.client.cros.chameleon import audio_test_utils
14from autotest_lib.client.cros.chameleon import chameleon_audio_helper
15from autotest_lib.client.cros.chameleon import chameleon_audio_ids
16from autotest_lib.server.cros.audio import audio_test
17from autotest_lib.server.cros.multimedia import remote_facade_factory
18
19
20class audio_AudioBasicInternalMicrophone(audio_test.AudioTest):
21    """Server side internal microphone audio test.
22
23    This test talks to a Chameleon board and a Cros device to verify
24    internal mic audio function of the Cros device.
25
26    """
27    version = 1
28    DELAY_BEFORE_RECORD_SECONDS = 0.5
29    RECORD_SECONDS = 9
30    DELAY_AFTER_BINDING = 0.5
31
32    def run_once(self, host, cfm_speaker=False):
33        """Runs Basic Audio Microphone test.
34
35        @param host: device under test CrosHost
36        @param cfm_speaker: whether cfm_speaker's audio is tested which is an
37            external USB speaker on CFM (ChromeBox For Meetings) devices.
38
39        """
40        if (not cfm_speaker and
41            not audio_test_utils.has_internal_microphone(host)):
42            return
43
44        golden_file = audio_test_data.SIMPLE_FREQUENCY_TEST_1330_FILE
45
46        chameleon_board = host.chameleon
47        factory = remote_facade_factory.RemoteFacadeFactory(
48                host, results_dir=self.resultsdir)
49
50        chameleon_board.setup_and_reset(self.outputdir)
51
52        widget_factory = chameleon_audio_helper.AudioWidgetFactory(
53                factory, host)
54
55        source = widget_factory.create_widget(
56            chameleon_audio_ids.ChameleonIds.LINEOUT)
57        sink = widget_factory.create_widget(
58            chameleon_audio_ids.PeripheralIds.SPEAKER)
59        binder = widget_factory.create_binder(source, sink)
60
61        recorder = widget_factory.create_widget(
62            chameleon_audio_ids.CrosIds.INTERNAL_MIC)
63
64        with chameleon_audio_helper.bind_widgets(binder):
65            # Checks the node selected by cras is correct.
66            time.sleep(self.DELAY_AFTER_BINDING)
67            audio_facade = factory.create_audio_facade()
68
69            audio_test_utils.dump_cros_audio_logs(
70                    host, audio_facade, self.resultsdir, 'after_binding')
71
72            expected_internal_mic_node = cras_configs.get_internal_mic_node(
73                    audio_test_utils.get_board_name(host), host.get_platform())
74            if not cfm_speaker:
75                audio_test_utils.check_audio_nodes(audio_facade,
76                        (None, [expected_internal_mic_node]))
77            else:
78                audio_test_utils.check_audio_nodes(audio_facade,
79                        (None, ['USB']))
80
81            logging.info('Setting playback data on Chameleon')
82            source.set_playback_data(golden_file)
83
84            # Starts playing, waits for some time, and then starts recording.
85            # This is to avoid artifact caused by chameleon codec initialization
86            # in the beginning of playback.
87            logging.info('Start playing %s from Chameleon',
88                         golden_file.path)
89            source.start_playback()
90
91            time.sleep(self.DELAY_BEFORE_RECORD_SECONDS)
92            logging.info('Start recording from Cros device.')
93            recorder.start_recording()
94
95            time.sleep(self.RECORD_SECONDS)
96
97            recorder.stop_recording()
98            logging.info('Stopped recording from Cros device.')
99
100            audio_test_utils.dump_cros_audio_logs(
101                    host, audio_facade, self.resultsdir, 'after_recording')
102
103            recorder.read_recorded_binary()
104            logging.info('Read recorded binary from Cros device.')
105
106        recorded_file = os.path.join(self.resultsdir, "recorded.raw")
107        logging.info('Saving recorded data to %s', recorded_file)
108        recorder.save_file(recorded_file)
109
110        # Removes the beginning of recorded data. This is to avoid artifact
111        # caused by Cros device codec initialization in the beginning of
112        # recording.
113        recorder.remove_head(1.0)
114
115        # Removes noise by a lowpass filter.
116        recorder.lowpass_filter(1500)
117        recorded_file = os.path.join(self.resultsdir, "recorded_filtered.raw")
118        logging.info('Saving filtered data to %s', recorded_file)
119        recorder.save_file(recorded_file)
120
121        # Cros device only records one channel data. Here we set the channel map
122        # of the recorder to compare the recorded data with left channel of the
123        # test data. This is fine as left and right channel of test data are
124        # identical.
125        recorder.channel_map = [0]
126
127        # Compares data by frequency. Audio signal from Chameleon Line-Out to
128        # speaker and finally recorded on Cros device using internal microphone
129        # has gone through analog processing and through the air.
130        # This suffers from codec artifacts and noise on the path.
131        # Comparing data by frequency is more robust than comparing them by
132        # correlation, which is suitable for fully-digital audio path like USB
133        # and HDMI.
134        audio_test_utils.check_recorded_frequency(golden_file, recorder,
135                                                  second_peak_ratio=0.2)
136