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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.common_lib import error
12from autotest_lib.client.cros.audio import audio_test_data
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):
33        if not audio_test_utils.has_internal_microphone(host):
34            return
35
36        golden_file = audio_test_data.SIMPLE_FREQUENCY_TEST_1330_FILE
37
38        chameleon_board = host.chameleon
39        factory = remote_facade_factory.RemoteFacadeFactory(
40                host, results_dir=self.resultsdir)
41
42        chameleon_board.setup_and_reset(self.outputdir)
43
44        widget_factory = chameleon_audio_helper.AudioWidgetFactory(
45                factory, host)
46
47        source = widget_factory.create_widget(
48            chameleon_audio_ids.ChameleonIds.LINEOUT)
49        sink = widget_factory.create_widget(
50            chameleon_audio_ids.PeripheralIds.SPEAKER)
51        binder = widget_factory.create_binder(source, sink)
52
53        recorder = widget_factory.create_widget(
54            chameleon_audio_ids.CrosIds.INTERNAL_MIC)
55
56        with chameleon_audio_helper.bind_widgets(binder):
57            # Checks the node selected by cras is correct.
58            time.sleep(self.DELAY_AFTER_BINDING)
59            audio_facade = factory.create_audio_facade()
60
61            audio_test_utils.dump_cros_audio_logs(
62                    host, audio_facade, self.resultsdir, 'after_binding')
63
64            _, input_nodes = audio_facade.get_selected_node_types()
65            if input_nodes != ['INTERNAL_MIC']:
66                raise error.TestFail(
67                        '%s rather than internal mic is selected on Cros '
68                        'device' % input_nodes)
69
70            logging.info('Setting playback data on Chameleon')
71            source.set_playback_data(golden_file)
72
73            # Starts playing, waits for some time, and then starts recording.
74            # This is to avoid artifact caused by chameleon codec initialization
75            # in the beginning of playback.
76            logging.info('Start playing %s from Chameleon',
77                         golden_file.path)
78            source.start_playback()
79
80            time.sleep(self.DELAY_BEFORE_RECORD_SECONDS)
81            logging.info('Start recording from Cros device.')
82            recorder.start_recording()
83
84            time.sleep(self.RECORD_SECONDS)
85
86            recorder.stop_recording()
87            logging.info('Stopped recording from Cros device.')
88
89            audio_test_utils.dump_cros_audio_logs(
90                    host, audio_facade, self.resultsdir, 'after_recording')
91
92            recorder.read_recorded_binary()
93            logging.info('Read recorded binary from Cros device.')
94
95        recorded_file = os.path.join(self.resultsdir, "recorded.raw")
96        logging.info('Saving recorded data to %s', recorded_file)
97        recorder.save_file(recorded_file)
98
99        # Removes the beginning of recorded data. This is to avoid artifact
100        # caused by Cros device codec initialization in the beginning of
101        # recording.
102        recorder.remove_head(1.0)
103
104        # Removes noise by a lowpass filter.
105        recorder.lowpass_filter(1500)
106        recorded_file = os.path.join(self.resultsdir, "recorded_filtered.raw")
107        logging.info('Saving filtered data to %s', recorded_file)
108        recorder.save_file(recorded_file)
109
110        # Cros device only records one channel data. Here we set the channel map
111        # of the recorder to compare the recorded data with left channel of the
112        # test data. This is fine as left and right channel of test data are
113        # identical.
114        recorder.channel_map = [0]
115
116        # Compares data by frequency. Audio signal from Chameleon Line-Out to
117        # speaker and finally recorded on Cros device using internal microphone
118        # has gone through analog processing and through the air.
119        # This suffers from codec artifacts and noise on the path.
120        # Comparing data by frequency is more robust than comparing them by
121        # correlation, which is suitable for fully-digital audio path like USB
122        # and HDMI.
123        audio_test_utils.check_recorded_frequency(golden_file, recorder,
124                                                  second_peak_ratio=0.2)
125