1 #!/usr/bin/python 2 3 # Copyright (C) 2012 The Android Open Source Project 4 # 5 # Licensed under the Apache License, Version 2.0 (the "License"); 6 # you may not use this file except in compliance with the License. 7 # You may obtain a copy of the License at 8 # 9 # http://www.apache.org/licenses/LICENSE-2.0 10 # 11 # Unless required by applicable law or agreed to in writing, software 12 # distributed under the License is distributed on an "AS IS" BASIS, 13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 # See the License for the specific language governing permissions and 15 # limitations under the License. 16 17 from consts import * 18 import numpy as np 19 import scipy as sp 20 21 # Example python script for signal processing in CTS audio 22 # There should be a function with the same name as the script 23 # Here, function example in example.py 24 25 # inputData : list of inputs with different types like int64, double, 26 # mono or stereo audio data 27 # inputTypes: list of types for each input. Types are defined as TYPE_XXX 28 # consts from consts.py 29 # return value: 3 elements list 30 # element 0 : execution result value as defined as RESULT_XXX in consts.py 31 # element 1 : outputData 32 # element 2 : outputTypes 33 # 34 # This example takes 2 stereo data, 2 mono data, 2 i64, and 2 doubles 35 # and returns average as 1 stereo data, 1 mono data, 1 i64, and 1 double 36 # inputTypes for this function is expected to be 37 # [ TYPE_STEREO, TYPE_STEREO, TYPE_MONO, TYPE_MONO, TYPE_I64, TYPE_I64, 38 # TYPE_DOUBLE, TYPE_DOUBLE ] 39 # outputTypes will be [ TYPE_STEREO, TYPE_MONO, TYPE_I64, TYPE_DOUBLE ] 40 def example(inputData, inputTypes): 41 output = [] 42 outputData = [] 43 outputTypes = [] 44 stereoInt = (inputData[0].astype(int) + inputData[1].astype(int))/2 45 stereo = stereoInt.astype(np.int16) 46 #print len(inputData[0]), len(inputData[1]), len(stereoInt), len(stereo) 47 monoInt = (inputData[2].astype(int) + inputData[3].astype(int))/2 48 mono = monoInt.astype(np.int16) 49 #print len(inputData[2]), len(inputData[3]), len(monoInt), len(mono) 50 i64Val = (inputData[4] + inputData[5])/2 51 doubleVal = (inputData[6] + inputData[7])/2 52 outputData.append(stereo) 53 outputTypes.append(TYPE_STEREO) 54 outputData.append(mono) 55 outputTypes.append(TYPE_MONO) 56 outputData.append(i64Val) 57 outputTypes.append(TYPE_I64) 58 outputData.append(doubleVal) 59 outputTypes.append(TYPE_DOUBLE) 60 output.append(RESULT_OK) 61 output.append(outputData) 62 output.append(outputTypes) 63 64 return output 65