1 # Copyright (c) 2010 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 os 6 import tempfile 7 8 from autotest_lib.client.bin import test, utils 9 from autotest_lib.client.common_lib import error 10 from autotest_lib.client.cros.audio import alsa_utils, cras_utils 11 12 DURATION = 3 13 TOLERANT_RATIO = 0.1 14 EXCLUSION_BOARDS = ['veyron_mickey'] 15 16 class audio_Microphone(test.test): 17 version = 1 18 19 20 def check_recorded_filesize( 21 self, filesize, duration, channels, rate, bits=16): 22 expected = duration * channels * (bits / 8) * rate 23 if abs(float(filesize) / expected - 1) > TOLERANT_RATIO: 24 raise error.TestFail('File size not correct: %d' % filesize) 25 26 27 def verify_alsa_capture(self, channels, rate, bits=16): 28 recorded_file = tempfile.NamedTemporaryFile() 29 alsa_utils.record( 30 recorded_file.name, duration=DURATION, channels=channels, 31 bits=bits, rate=rate) 32 self.check_recorded_filesize( 33 os.path.getsize(recorded_file.name), 34 DURATION, channels, rate, bits) 35 36 37 def verify_cras_capture(self, channels, rate): 38 recorded_file = tempfile.NamedTemporaryFile() 39 cras_utils.capture( 40 recorded_file.name, duration=DURATION, channels=channels, 41 rate=rate) 42 self.check_recorded_filesize( 43 os.path.getsize(recorded_file.name), 44 DURATION, channels, rate) 45 46 47 def run_once(self): 48 # Mono and stereo capturing should work fine @ 44.1KHz and 48KHz. 49 if utils.get_board().lower() not in EXCLUSION_BOARDS: 50 # Verify recording using ALSA utils. 51 channels = alsa_utils.get_card_preferred_record_channels() 52 if channels is None: 53 channels = [1, 2] 54 55 for c in channels: 56 self.verify_alsa_capture(c, 44100) 57 self.verify_alsa_capture(c, 48000) 58 59 # Verify recording of CRAS. 60 self.verify_cras_capture(1, 44100) 61 self.verify_cras_capture(1, 48000) 62 self.verify_cras_capture(2, 48000) 63 self.verify_cras_capture(2, 44100) 64
