suite/audio_quality/test_description/processing/playback_sample.py

#!/usr/bin/python

# Copyright (C) 2014 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.

from consts import *

# Sample test for dut_playback_sample case
# Input: host recording (mono),
#        frequency of sine in Hz (i64)
#        pass level threshold (double)
# Output: device (double) frequency

def playback_sample(inputData, inputTypes):
    output = []
    outputData = []
    outputTypes = []
    # basic sanity check
    inputError = False
    if (inputTypes[0] != TYPE_MONO):
        inputError = True
    if (inputTypes[1] != TYPE_I64):
        inputError = True
    if (inputTypes[2] != TYPE_DOUBLE):
        inputError = True
    if inputError:
        output.append(RESULT_ERROR)
        output.append(outputData)
        output.append(outputTypes)
        return output

    hostRecording = inputData[0]
    signalFrequency = inputData[1]
    threshold = inputData[2]
    samplingRate = 44100

    freq = calc_freq(hostRecording, samplingRate)
    print "Expected Freq ", signalFrequency, "Actual Freq ", freq, "Threshold % ", threshold
    diff = abs(freq - signalFrequency)
    if (diff < threshold):
        output.append(RESULT_PASS)
    else:
        output.append(RESULT_OK)
    outputData.append(freq)
    outputTypes.append(TYPE_DOUBLE)
    output.append(outputData)
    output.append(outputTypes)
    return output

def calc_freq(recording, samplingRate):
    #This would calculate the frequency of recording, but is skipped in this sample test for brevity
    return 32000