| # Copyright (c) 2010 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import os |
| import tempfile |
| |
| from autotest_lib.client.bin import test |
| from autotest_lib.client.common_lib import error |
| from autotest_lib.client.cros.audio import alsa_utils |
| |
| DURATION = 3 |
| TOLERANT_RATIO = 0.1 |
| |
| class audio_Microphone(test.test): |
| version = 1 |
| |
| |
| def check_recorded_filesize( |
| self, filesize, duration, channels, bits, rate): |
| expected = duration * channels * (bits / 8) * rate |
| if abs(float(filesize) / expected - 1) > TOLERANT_RATIO: |
| raise error.TestFail('File size not correct: %d' % filesize) |
| |
| |
| def verify_capture(self, channels, rate, bits=16): |
| recorded_file = tempfile.NamedTemporaryFile() |
| alsa_utils.record( |
| recorded_file.name, duration=DURATION, channels=channels, |
| bits=bits, rate=rate) |
| self.check_recorded_filesize( |
| os.path.getsize(recorded_file.name), |
| DURATION, channels, bits, rate) |
| |
| |
| def run_once(self): |
| # Mono and stereo capturing should work fine @ 44.1KHz and 48KHz. |
| self.verify_capture(1, 44100) |
| self.verify_capture(1, 48000) |
| self.verify_capture(2, 48000) |
| self.verify_capture(2, 44100) |
