1 /* 2 * Author: Stefan Andritoiu <stefan.andritoiu (at) intel.com> 3 * Copyright (c) 2015 Intel Corporation. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sublicense, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be 14 * included in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 public class MicrophoneSample { 26 27 static { 28 try { 29 System.loadLibrary("javaupm_mic"); 30 } catch (UnsatisfiedLinkError e) { 31 System.err.println("error in loading native library"); 32 System.exit(-1); 33 } 34 } 35 36 public static void main(String[] args) throws InterruptedException { 37 // ! [Interesting] 38 short[] buffer = new short[128]; 39 40 // Attach microphone to analog port A0 41 upm_mic.Microphone sensor = new upm_mic.Microphone(0); 42 43 upm_mic.thresholdContext ctx = new upm_mic.thresholdContext(); 44 ctx.setAverageReading(0); 45 ctx.setRunningAverage(0); 46 ctx.setAveragedOver(2); 47 48 // Repeatedly, take a sample every 2 microseconds; 49 // find the average of 128 samples; and 50 // print a running graph of the averages 51 while (true) { 52 int len = sensor.getSampledWindow(2, buffer); 53 54 if (len != 0) { 55 int thresh = sensor.findThreshold(ctx, 30, buffer); 56 sensor.printGraph(ctx); 57 if (thresh != 0) { 58 System.out.println("---Threshold reached--- " + ctx.getRunningAverage() + " " 59 + ctx.getAverageReading()); 60 } 61 } 62 } 63 // ! [Interesting] 64 } 65 }
