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      1 # Copyright 2016 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 import logging
      6 import tempfile
      7 import time
      8 
      9 import common
     10 from autotest_lib.client.common_lib import error
     11 from autotest_lib.client.common_lib import site_utils
     12 from autotest_lib.client.common_lib.feedback import client
     13 from autotest_lib.server import test
     14 from autotest_lib.server.brillo import audio_utils
     15 
     16 
     17 # Number of channels to generate.
     18 _DEFAULT_NUM_CHANNELS = 2
     19 # Sine wave sample rate (44.1kHz).
     20 _DEFAULT_SAMPLE_RATE = 44100
     21 # Sine wave default sample format is signed 16-bit PCM (two bytes).
     22 _DEFAULT_SAMPLE_WIDTH = 2
     23 # Default sine wave frequency.
     24 _DEFAULT_SINE_FREQUENCY = 440
     25 # Default duration of the sine wave in seconds.
     26 _DEFAULT_DURATION_SECS = 10
     27 
     28 class brillo_DecodingAudioTest(test.test):
     29     """Verify that basic audio playback works."""
     30     version = 1
     31 
     32 
     33     def run_once(self, host, fb_client, file_format,
     34                  duration_secs=_DEFAULT_DURATION_SECS):
     35         """Runs the test.
     36 
     37         @param host: A host object representing the DUT.
     38         @param fb_client: A feedback client implementation.
     39         @param file_format: A string represeting the format to the audio
     40                             encoding to use.
     41         @param duration_secs: Duration to play file for.
     42         """
     43         self.temp_dir = tempfile.mkdtemp(dir=fb_client.tmp_dir)
     44         with fb_client.initialize(self, host):
     45             logging.info('Testing silent playback to get silence threshold')
     46             fb_query = fb_client.new_query(client.QUERY_AUDIO_PLAYBACK_SILENT)
     47             fb_query.prepare()
     48             time.sleep(duration_secs)
     49             fb_query.validate()
     50 
     51             logging.info('Generate mp3 file')
     52             local_filename, dut_play_file = audio_utils.generate_sine_file(
     53                     host, _DEFAULT_NUM_CHANNELS, _DEFAULT_SAMPLE_RATE,
     54                     _DEFAULT_SAMPLE_WIDTH, _DEFAULT_DURATION_SECS,
     55                     _DEFAULT_SINE_FREQUENCY, self.temp_dir, file_format)
     56 
     57             fb_query = fb_client.new_query(client.QUERY_AUDIO_PLAYBACK_AUDIBLE)
     58 
     59             fb_query.prepare(sample_width=_DEFAULT_SAMPLE_WIDTH,
     60                              sample_rate=_DEFAULT_SAMPLE_RATE,
     61                              duration_secs=duration_secs,
     62                              num_channels=_DEFAULT_NUM_CHANNELS)
     63 
     64             playback_cmd = 'slesTest_playFdPath %s 0' % dut_play_file
     65             logging.info('Testing decode playback')
     66             host.run(playback_cmd)
     67             fb_query.validate(audio_file=local_filename)
     68