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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 
      7 import logging
      8 import os
      9 import time
     10 
     11 from autotest_lib.client.common_lib import error
     12 from autotest_lib.client.cros.audio import audio_test_data
     13 from autotest_lib.client.cros.chameleon import audio_test_utils
     14 from autotest_lib.client.cros.chameleon import chameleon_audio_ids
     15 from autotest_lib.client.cros.chameleon import chameleon_audio_helper
     16 from autotest_lib.server.cros.audio import audio_test
     17 from autotest_lib.server.cros.multimedia import remote_facade_factory
     18 
     19 
     20 class 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             output_nodes, _ = audio_facade.get_selected_node_types()
     69             if output_nodes != ['HEADPHONE']:
     70                 raise error.TestFail(
     71                         '%s rather than headphone is selected on Cros '
     72                         'device' % output_nodes)
     73 
     74             logging.info('Setting playback data on Cros device')
     75             source.set_playback_data(golden_file)
     76 
     77             # Starts playing, waits for some time, and then starts recording.
     78             # This is to avoid artifact caused by codec initialization.
     79             logging.info('Start playing %s on Cros device',
     80                          golden_file.path)
     81             source.start_playback()
     82 
     83             time.sleep(self.DELAY_BEFORE_RECORD_SECONDS)
     84             logging.info('Start recording from Chameleon.')
     85             recorder.start_recording()
     86 
     87             time.sleep(self.RECORD_SECONDS)
     88 
     89             if check_quality:
     90                 # Add a silence while recording to detect audio
     91                 # spikes after playback.
     92                 time.sleep(self.SILENCE_WAIT)
     93 
     94             recorder.stop_recording()
     95             logging.info('Stopped recording from Chameleon.')
     96 
     97             audio_test_utils.dump_cros_audio_logs(
     98                     host, audio_facade, self.resultsdir, 'after_recording')
     99 
    100             recorder.read_recorded_binary()
    101             logging.info('Read recorded binary from Chameleon.')
    102 
    103         recorded_file = os.path.join(self.resultsdir, "recorded.raw")
    104         logging.info('Saving recorded data to %s', recorded_file)
    105         recorder.save_file(recorded_file)
    106 
    107         # Removes the beginning of recorded data. This is to avoid artifact
    108         # caused by Chameleon codec initialization in the beginning of
    109         # recording.
    110         recorder.remove_head(0.5)
    111 
    112         recorded_file = os.path.join(self.resultsdir, "recorded_clipped.raw")
    113         logging.info('Saving clipped data to %s', recorded_file)
    114         recorder.save_file(recorded_file)
    115 
    116         # Compares data by frequency. Headphone audio signal has gone through
    117         # analog processing. This suffers from codec artifacts and noise on the
    118         # path. Comparing data by frequency is more robust than comparing by
    119         # correlation, which is suitable for fully-digital audio path like USB
    120         # and HDMI.
    121         audio_test_utils.check_recorded_frequency(
    122                 golden_file, recorder, check_artifacts=check_quality)
    123