1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.drrickorang.loopback; 18 19 20 /** 21 * This class is used to generates different kinds of tones. 22 */ 23 24 public abstract class ToneGeneration { 25 protected int mSamplingRate; 26 protected double mAmplitude; // this value should be from 0 to 1.0 27 protected boolean mIsGlitchEnabled = false; // indicates we are inserting glitches or not 28 29 30 public ToneGeneration(int samplingRate) { 31 mSamplingRate = samplingRate; 32 } 33 34 35 /** Store samples into "tone". Value of samples are from -32768 to 32767. */ 36 public abstract void generateTone(short[] tone, int size); 37 38 39 /** 40 * Store samples into "tone". Value of samples are from -1.0 to 1.0. 41 * This function is not supposed to be used to create tone that is going to pass 42 * into AudioTrack.write() as it only takes in float. 43 */ 44 public abstract void generateTone(double[] tone, int size); 45 46 47 /** Reset all the phases to zero. */ 48 public abstract void resetPhases(); 49 50 51 /** 52 * Set the value of mIsGlitchEnabled. If mIsGlitchEnabled == true, will insert glitches to 53 * the generated tone. 54 */ 55 public void setGlitchEnabled(boolean isGlitchEnabled) { 56 mIsGlitchEnabled = isGlitchEnabled; 57 } 58 59 public void setAmplitude(double amplitude) { 60 mAmplitude = amplitude; 61 } 62 63 } 64
