1 # Copyright (c) 2011 The Chromium 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, os, time 6 7 from autotest_lib.client.common_lib import error 8 from autotest_lib.client.cros.audio import audio_helper 9 from autotest_lib.client.cros.audio import audio_test_data 10 from autotest_lib.client.cros.audio import alsa_utils 11 from autotest_lib.client.cros.audio import cmd_utils 12 from autotest_lib.client.cros.audio import cras_utils 13 14 15 TEST_DURATION = 1 16 17 class audio_AlsaLoopback(audio_helper.alsa_rms_test): 18 """Verifies audio playback and capture function.""" 19 version = 1 20 21 def run_once(self): 22 """Entry point of this test.""" 23 24 # Sine wav file lasts 5 seconds 25 wav_path = os.path.join(self.bindir, '5SEC.wav') 26 data_format = dict(file_type='wav', sample_format='S16_LE', 27 channel=2, rate=48000) 28 wav_file = audio_test_data.GenerateAudioTestData( 29 path=wav_path, 30 data_format=data_format, 31 duration_secs=5, 32 frequencies=[440, 440], 33 volume_scale=0.9) 34 35 recorded_file = os.path.join(self.resultsdir, 'hw_recorded.wav') 36 37 # Get selected input and output devices. 38 cras_input = cras_utils.get_selected_input_device_name() 39 cras_output = cras_utils.get_selected_output_device_name() 40 logging.debug("Selected input=%s, output=%s", cras_input, cras_output) 41 if cras_input is None: 42 raise error.TestFail("Fail to get selected input device.") 43 if cras_output is None: 44 raise error.TestFail("Fail to get selected output device.") 45 alsa_input = alsa_utils.convert_device_name(cras_input) 46 alsa_output = alsa_utils.convert_device_name(cras_output) 47 48 (output_type, input_type) = cras_utils.get_selected_node_types() 49 if 'MIC' not in input_type: 50 raise error.TestFail("Wrong input type=%s", input_type) 51 if 'HEADPHONE' not in output_type: 52 raise error.TestFail("Wrong output type=%s", output_type) 53 54 p = cmd_utils.popen(alsa_utils.playback_cmd(wav_file.path, device=alsa_output)) 55 try: 56 # Wait one second to make sure the playback has been started. 57 time.sleep(1) 58 alsa_utils.record(recorded_file, duration=TEST_DURATION, 59 device=alsa_input) 60 61 # Make sure the audio is still playing. 62 if p.poll() != None: 63 raise error.TestError('playback stopped') 64 finally: 65 cmd_utils.kill_or_log_returncode(p) 66 wav_file.delete() 67 68 rms_value = audio_helper.get_rms(recorded_file)[0] 69 70 self.write_perf_keyval({'rms_value': rms_value}) 71 72
