#!/usr/bin/python
# Copyright (C) 2012 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 *
import numpy as np
import scipy as sp
from calc_thd import *
import calc_delay
# calculate THD for dut_playback_thd case
# Input: host recording (mono),
# frequency of sine in Hz (i64)
# THD pass level in percentile (double)
# Output: THD device (double) in percentile
def playback_thd(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]
thdPassPercentile = inputData[2]
samplingRate = 44100
thd = calc_thd(hostRecording, signalFrequency, samplingRate, 0.02) * 100
print "THD %", thd, "Margain % ", thdPassPercentile
if (thd < thdPassPercentile):
output.append(RESULT_PASS)
else:
output.append(RESULT_OK)
outputData.append(thd)
outputTypes.append(TYPE_DOUBLE)
output.append(outputData)
output.append(outputTypes)
return output