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#!/usr/bin/env python
#
# Copyright (C) 2017 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import logging
import math
import os
from time import sleep
from vts.runners.host import asserts
from vts.runners.host import base_test
from vts.runners.host import const
from vts.runners.host import test_runner
from vts.utils.python.controllers import android_device
class AudioLoopbackTest(base_test.BaseTestClass):
"""A test module for the Audio Loopback Benchmark."""
# Threshold for average latency and standard deviation.
THRESHOLD = {"MAX_LATENCY": 20000000, }
TEST_DATA_DIR = "audiotest"
FULL_DATA_DIR_PATH = os.path.join("/mnt/sdcard/", TEST_DATA_DIR)
TEST_FILE_PREFIX = "out"
TEST_FILE_NAME = os.path.join(FULL_DATA_DIR_PATH,
TEST_FILE_PREFIX + ".txt")
ITERATION = 100
def setUpClass(self):
self.dut = self.registerController(android_device)[0]
self.dut.shell.InvokeTerminal("one")
self.dut.adb.shell("mkdir -p %s" % self.FULL_DATA_DIR_PATH)
# install Loopback.apk
self.dut.adb.shell("pm install -r -g /data/local/tmp/Loopback.apk")
def tearDown(self):
self.dut.adb.shell("rm -rf %s" % self.FULL_DATA_DIR_PATH)
def ProcessTestResults(self, latencies, confidences):
"""Process test results and upload to web dashboard.
Calculate the average and standard deviation of latencies from all test run.
Only test results with confidence = 1.0 are counted.
Args:
latencies: List of latency (in ns) get from each run. e.g.[8040000]
confidences: List of confidence get from each run. e.g. [0.98, 1.0]
"""
total_latency = 0
total_run = 0
for latency, confidence in zip(latencies, confidences):
# filter test runs with confidence < 1.0
if confidence < 1.0:
latencies.remove(latency)
else:
total_latency += latency
total_run += 1
asserts.assertLess(0, total_run, "No valid runs.")
self.web.AddProfilingDataUnlabeledVector(
"AVG_LATENCY",
latencies,
x_axis_label="AVG Roundtrip latency (ns)",
y_axis_label="Frequency")
# calculate the average latency.
avg_latency = total_latency / total_run
logging.info("avg_latency: %s", avg_latency)
asserts.assertLess(avg_latency, self.THRESHOLD["MAX_LATENCY"],
"avg latency exceeds threshold")
# calculate the standard deviation of latencies.
sd = 0.0
for latency in latencies:
sd += (latency - avg_latency) * (latency - avg_latency)
sd = int(math.sqrt(sd / total_run))
logging.info("standard_deviation: %s", sd)
self.web.AddProfilingDataUnlabeledVector(
"STANDARD_DEVIATION", [sd],
x_axis_label="Standard deviation",
y_axis_label="Frequency")
def testRun(self):
"""Runs test in audio Loopback.apk and process the test results."""
latencies = []
confidences = []
for i in range(0, self.ITERATION):
self.dut.shell.one.Execute(
["rm -f %s/*" % self.FULL_DATA_DIR_PATH])
self.dut.shell.one.Execute([
"am start -n org.drrickorang.loopback/.LoopbackActivity "
"--es FileName %s/%s --ei AudioLevel 11 --ei TestType 222;" %
(self.TEST_DATA_DIR, self.TEST_FILE_PREFIX)
])
# wait until the test finished.
results = self.dut.shell.one.Execute(
["ls %s" % self.TEST_FILE_NAME])
while results[const.EXIT_CODE][0]:
logging.info("Test is running...")
sleep(1)
results = self.dut.shell.one.Execute(
["ls %s" % self.TEST_FILE_NAME])
results = self.dut.shell.one.Execute(
["cat %s" % self.TEST_FILE_NAME])
asserts.assertFalse(results[const.EXIT_CODE][0],
"Fail to get the test output")
stdout_lines = results[const.STDOUT][0].split("\n")
for line in stdout_lines:
if line.startswith("LatencyMs"):
latencies.append(
int(
float(line.replace("LatencyMs = ", "")) * 1000000))
if line.startswith("LatencyConfidence"):
confidences.append(
float(line.replace("LatencyConfidence = ", "")))
self.ProcessTestResults(latencies, confidences)
if __name__ == "__main__":
test_runner.main()
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