/
MicrophoneMonitor.java
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/
MicrophoneMonitor.java
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package org.havenapp.main.sensors;
/**
* Created by n8fr8 on 3/10/17.
*/
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.util.Log;
import org.havenapp.main.PreferenceManager;
import org.havenapp.main.model.EventTrigger;
import org.havenapp.main.sensors.media.AudioRecorderTask;
import org.havenapp.main.sensors.media.MicSamplerTask;
import org.havenapp.main.sensors.media.MicrophoneTaskFactory;
import org.havenapp.main.service.MonitorService;
public final class MicrophoneMonitor implements MicSamplerTask.MicListener {
private MicSamplerTask microphone;
/**
* Object used to fetch application dependencies
*/
private PreferenceManager prefs;
/**
* Threshold for the decibels sampled
*/
private double mNoiseThreshold = 70.0;
/**
* Messenger used to communicate with alert service
*/
private Messenger serviceMessenger = null;
private Context context;
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className,
IBinder service) {
Log.i("MicrophoneFragment", "SERVICE CONNECTED");
// We've bound to LocalService, cast the IBinder and get LocalService instance
serviceMessenger = new Messenger(service);
}
public void onServiceDisconnected(ComponentName arg0) {
Log.i("MicrophoneFragment", "SERVICE DISCONNECTED");
serviceMessenger = null;
}
};
public MicrophoneMonitor(Context context)
{
this.context = context;
prefs = new PreferenceManager(context);
switch (prefs.getMicrophoneSensitivity()) {
case "High":
mNoiseThreshold = 40;
break;
case "Medium":
mNoiseThreshold = 60;
break;
default:
try {
//maybe it is a threshold value?
mNoiseThreshold = Double.parseDouble(prefs.getMicrophoneSensitivity());
} catch (Exception ignored) {
}
break;
}
context.bindService(new Intent(context,
MonitorService.class), mConnection, Context.BIND_ABOVE_CLIENT);
try {
microphone = MicrophoneTaskFactory.makeSampler(context);
microphone.setMicListener(this);
microphone.execute();
} catch (MicrophoneTaskFactory.RecordLimitExceeded e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void stop (Context context)
{
context.unbindService(mConnection);
if (microphone != null)
microphone.cancel(true);
}
public void onSignalReceived(short[] signal) {
/*
* We do and average of the 512 samples
*/
int total = 0;
int count = 0;
for (short peak : signal) {
//Log.i("MicrophoneFragment", "Sampled values are: "+peak);
if (peak != 0) {
total += Math.abs(peak);
count++;
}
}
// Log.i("MicrophoneFragment", "Total value: " + total);
int average = 0;
if (count > 0) average = total / count;
/*
* We compute a value in decibels
*/
double averageDB = 0.0;
if (average != 0) {
averageDB = 20 * Math.log10(Math.abs(average));
}
if (averageDB > mNoiseThreshold) {
if (!MicrophoneTaskFactory.isRecording()) {
Message message = new Message();
message.what = EventTrigger.MICROPHONE;
try {
if (serviceMessenger != null)
serviceMessenger.send(message);
} catch (RemoteException e) {
// Cannot happen
}
try {
AudioRecorderTask audioRecorderTask = MicrophoneTaskFactory.makeRecorder(context);
audioRecorderTask.setAudioRecorderListener(new AudioRecorderTask.AudioRecorderListener() {
@Override
public void recordingComplete(String path) {
Message message = new Message();
message.what = EventTrigger.MICROPHONE;
message.getData().putString("path",path);
try {
if (serviceMessenger != null)
serviceMessenger.send(message);
} catch (RemoteException e) {
// Cannot happen
}
}
});
audioRecorderTask.start();
} catch (MicrophoneTaskFactory.RecordLimitExceeded rle) {
Log.w("MicrophoneMonitor", "We are already recording!");
}
}
}
}
public void onMicError() {
Log.e("MicrophoneActivity", "Microphone is not ready");
}
}