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1# Copyright 2014 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 headphone audio 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_ids
15from autotest_lib.client.cros.chameleon import chameleon_audio_helper
16from autotest_lib.server.cros.audio import audio_test
17from autotest_lib.server.cros.multimedia import remote_facade_factory
18
19
20class audio_AudioBasicHeadphone(audio_test.AudioTest):
21    """Server side headphone audio test.
22
23    This test talks to a Chameleon board and a Cros device to verify
24    headphone audio function of the Cros device.
25
26    """
27    version = 1
28    DELAY_BEFORE_RECORD_SECONDS = 0.5
29    RECORD_SECONDS = 5
30    DELAY_AFTER_BINDING = 0.5
31    SILENCE_WAIT = 5
32
33    def run_once(self, host, check_quality=False):
34        """Running basic headphone audio tests.
35
36        @param host: device under test host
37        @param check_quality: flag to check audio quality.
38
39        """
40        if not audio_test_utils.has_headphone(host):
41            return
42
43        golden_file = audio_test_data.FREQUENCY_TEST_FILE
44
45        chameleon_board = host.chameleon
46        factory = remote_facade_factory.RemoteFacadeFactory(
47                host, results_dir=self.resultsdir)
48
49        chameleon_board.setup_and_reset(self.outputdir)
50
51        widget_factory = chameleon_audio_helper.AudioWidgetFactory(
52                factory, host)
53
54        source = widget_factory.create_widget(
55            chameleon_audio_ids.CrosIds.HEADPHONE)
56        recorder = widget_factory.create_widget(
57            chameleon_audio_ids.ChameleonIds.LINEIN)
58        binder = widget_factory.create_binder(source, recorder)
59
60        with chameleon_audio_helper.bind_widgets(binder):
61            # Checks the node selected by cras is correct.
62            time.sleep(self.DELAY_AFTER_BINDING)
63            audio_facade = factory.create_audio_facade()
64
65            audio_test_utils.dump_cros_audio_logs(
66                    host, audio_facade, self.resultsdir, 'after_binding')
67
68            audio_test_utils.check_audio_nodes(audio_facade, (['HEADPHONE'], None))
69
70            logging.info('Setting playback data on Cros device')
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 codec initialization.
75            logging.info('Start playing %s on Cros device',
76                         golden_file.path)
77            source.start_playback()
78
79            time.sleep(self.DELAY_BEFORE_RECORD_SECONDS)
80            logging.info('Start recording from Chameleon.')
81            recorder.start_recording()
82
83            time.sleep(self.RECORD_SECONDS)
84
85            if check_quality:
86                # Add a silence while recording to detect audio
87                # spikes after playback.
88                time.sleep(self.SILENCE_WAIT)
89
90            recorder.stop_recording()
91            logging.info('Stopped recording from Chameleon.')
92
93            audio_test_utils.dump_cros_audio_logs(
94                    host, audio_facade, self.resultsdir, 'after_recording')
95
96            recorder.read_recorded_binary()
97            logging.info('Read recorded binary from Chameleon.')
98
99        recorded_file = os.path.join(self.resultsdir, "recorded.raw")
100        logging.info('Saving recorded data to %s', recorded_file)
101        recorder.save_file(recorded_file)
102
103        # Removes the beginning of recorded data. This is to avoid artifact
104        # caused by Chameleon codec initialization in the beginning of
105        # recording.
106        recorder.remove_head(0.5)
107
108        recorded_file = os.path.join(self.resultsdir, "recorded_clipped.raw")
109        logging.info('Saving clipped data to %s', recorded_file)
110        recorder.save_file(recorded_file)
111
112        # Compares data by frequency. Headphone audio signal has gone through
113        # analog processing. This suffers from codec artifacts and noise on the
114        # path. Comparing data by frequency is more robust than comparing by
115        # correlation, which is suitable for fully-digital audio path like USB
116        # and HDMI.
117        audio_test_utils.check_recorded_frequency(
118                golden_file, recorder, check_artifacts=check_quality)
119