siebenhaarmi76624
/
MDT5_1_Ueberwachungssystem_G1
Watch 3
Star 1
Fork 0
Code Issues 0 Pull Requests 0 Releases 0 Wiki Activity
Browse Source

Merge remote-tracking branch 'origin/master' 

# Conflicts:
#	app/src/main/AndroidManifest.xml
#	app/src/main/java/com/example/ueberwachungssystem/MainActivity.java
#	app/src/main/res/layout/activity_main.xml
koLayoutTest
Oliver Kleinecke 10 months ago
parent
746eec18ba 6f78836c4d
commit
061646a7d6
23 changed files with 1801 additions and 158 deletions
Split View Show Diff Stats
  1. 3
    0
      Notiz.txt
  2. 12
    0
      app/build.gradle
  3. 4
    21
      app/src/main/AndroidManifest.xml
  4. 108
    0
      app/src/main/java/com/example/ueberwachungssystem/Detection/Accelerometer.java
  5. 74
    0
      app/src/main/java/com/example/ueberwachungssystem/Detection/AudioRecorder.java
  6. 7
    5
      app/src/main/java/com/example/ueberwachungssystem/Detection/DetectionReport.java
  7. 43
    5
      app/src/main/java/com/example/ueberwachungssystem/Detection/Detector.java
  8. 174
    0
      app/src/main/java/com/example/ueberwachungssystem/Detection/DetectorService.java
  9. 382
    0
      app/src/main/java/com/example/ueberwachungssystem/Detection/MicrophoneDetector.java
  10. 109
    0
      app/src/main/java/com/example/ueberwachungssystem/Detection/OpenCVHelper.java
  11. 148
    0
      app/src/main/java/com/example/ueberwachungssystem/Detection/Signalverarbeitung/Complex.java
  12. 246
    0
      app/src/main/java/com/example/ueberwachungssystem/Detection/Signalverarbeitung/FFT.java
  13. 236
    105
      app/src/main/java/com/example/ueberwachungssystem/Detection/VideoDetector.java
  14. 43
    0
      app/src/main/java/com/example/ueberwachungssystem/PermissionHandler.java
  15. 48
    0
      app/src/main/java/com/example/ueberwachungssystem/PermissionRequest.java
  16. 86
    0
      app/src/main/java/com/example/ueberwachungssystem/PopUpClass.java
  17. 33
    18
      app/src/main/java/com/example/ueberwachungssystem/WifiCommunication.java
  18. 29
    0
      app/src/main/res/layout/popup_window.xml
  19. 9
    0
      app/src/main/res/menu/options_menu.xml
  20. 2
    2
      build.gradle
  21. 3
    1
      gradle.properties
  22. 1
    1
      gradle/wrapper/gradle-wrapper.properties
  23. 1
    0
      settings.gradle

+ 3
- 0
Notiz.txt View File

@@ -0,0 +1,3 @@
Sensor als Service einrichten, der aus Activity heraus gestartet werden kann.
Stichwort: Intent
Siehe Skript Teil 1

+ 12
- 0
app/build.gradle View File

@@ -26,6 +26,9 @@ android {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
buildFeatures {
viewBinding true
}
}

dependencies {
@@ -33,10 +36,19 @@ dependencies {
implementation 'androidx.appcompat:appcompat:1.6.1'
implementation 'com.google.android.material:material:1.8.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
implementation 'com.google.android.gms:play-services-nearby:18.0.0'
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.5'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'


// OpenCV (from: https://github.com/QuickBirdEng/opencv-android)
def opencv_version = "4.5.3.0"
implementation "com.quickbirdstudios:opencv:${opencv_version}"

implementation "androidx.lifecycle:lifecycle-extensions:2.0.0"


// Required for CameraX
def camerax_version = "1.2.2"
implementation "androidx.camera:camera-core:${camerax_version}"

+ 4
- 21
app/src/main/AndroidManifest.xml View File

@@ -2,27 +2,9 @@
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">

<!-- &lt;!&ndash; If your app targets Android 13 (API level 33)-->
<!-- or higher, you must declare the NEARBY_WIFI_DEVICES permission. &ndash;&gt;-->
<!-- <uses-permission android:name="android.permission.NEARBY_WIFI_DEVICES"-->
<!-- &lt;!&ndash; If your app derives location information from Wi-Fi APIs,-->
<!-- don't include the "usesPermissionFlags" attribute. &ndash;&gt;-->
<!-- android:usesPermissionFlags="neverForLocation" />-->

<uses-permission
android:required="true"
android:name="android.permission.ACCESS_FINE_LOCATION"/>
<!-- If any feature in your app relies on precise location information,
don't include the "maxSdkVersion" attribute. -->
<uses-permission
android:required="true"
android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission
android:required="true"
android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission
android:required="true"
android:name="android.permission.INTERNET"/>
<uses-feature android:name="android.hardware.camera"/>
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.RECORD_AUDIO" />

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
@@ -46,6 +28,7 @@
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".Detection.DetectorService"/>
</application>

</manifest>

+ 108
- 0
app/src/main/java/com/example/ueberwachungssystem/Detection/Accelerometer.java View File

@@ -0,0 +1,108 @@
package com.example.ueberwachungssystem.Detection;

import static java.lang.Math.sqrt;

import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;


/**
* Accelerometer inherits some methods from abstract Detector class (more info there)
*
*
* USE FROM MAIN ACTIVITY:
*
* Accelerometer beschleunigungssensor = new Accelerometer(this);
* onCreate:
* //Accelerometer Setup
* beschleunigungssensor = new Accelerometer(this, logger, textViewLog); //logger and textview only for debugging necessary
* beschleunigungssensor.getSensor();
*
* //Starting Detection:
* beschleunigungssensor.startDetection();
* //Stopping Detection: also recommended at onPause to avoid unnecessary battery consumption
* beschleunigungssensor.stopDetection();
*
* */

public class Accelerometer extends Detector implements SensorEventListener {

public SensorManager sensorManager;
private static final int sensorType = Sensor.TYPE_LINEAR_ACCELERATION;
private Sensor accelerometer;
private Context context;
boolean alarm = false;
//Preallocate memory for the data of each axis of the acceleration sensor
float x;
float y;
float z;
float betrag; //Betrag aller drei Achsen sqrt(x*x + y*y + z*z)
private DetectionReport detectionReport;

// In constructor pass Activity, Context and TextView from MainActivity in Accelerometer class
public Accelerometer(Context context){
super(); //von Detektor
this.context = context;
}

public void getSensor(){
sensorManager = (SensorManager)context.getSystemService(Context.SENSOR_SERVICE);
if(sensorManager.getSensorList(sensorType).size()==0) {
accelerometer = null;
}
else {
accelerometer = sensorManager.getSensorList(sensorType).get(0);
}
}

@Override
public void onSensorChanged(SensorEvent event) {
try {
checkAlarm(event);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}

public void checkAlarm (SensorEvent event) throws InterruptedException {
x = event.values[0];
y = event.values[1];
z = event.values[2];
betrag = (float) sqrt(x*x + y*y + z*z);
float threshold = 1.5F;

if (!alarm) {
if (betrag > threshold) {
alarm = true;
reportViolation("Bewegung", betrag);
}
} else {
if (betrag < threshold) {
alarm = false;
} else {
}
}
}

@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}

@Override
public void startDetection() {
// entspricht void start()
//getSensor();
if (accelerometer != null) {
sensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_GAME);
}
}

@Override
public void stopDetection() {
// entspricht void stop()
sensorManager.unregisterListener(this, accelerometer);
}
}

+ 74
- 0
app/src/main/java/com/example/ueberwachungssystem/Detection/AudioRecorder.java View File

@@ -0,0 +1,74 @@
package com.example.ueberwachungssystem.Detection;

import android.content.Context;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.widget.Toast;

import java.io.File;
import java.io.IOException;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class AudioRecorder {
private final Context context;
private MediaRecorder mediaRecorder = null;
private boolean isRecording = false;
private File outputDir; // Default: in app files directory


public AudioRecorder (Context context) {
this.context = context;
this.outputDir = context.getFilesDir();
}

public void startRecording() {
// Handle logic
if (outputDir == null)
return;
if (isRecording)
return;
isRecording = true;

// Setup Audio Recorder for output Format: 3GP
mediaRecorder = new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mediaRecorder.setOutputFile(outputDir + "/" + generateFileName() + ".3gp");
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
mediaRecorder.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mediaRecorder.start();
}

public void stopRecording() {
if (mediaRecorder != null) {
mediaRecorder.stop();
mediaRecorder.reset();
mediaRecorder.release();
mediaRecorder = null;
isRecording = false;
Toast.makeText(context, "audio recording saved", Toast.LENGTH_SHORT).show();
}
}

public boolean isRecording(){
return isRecording;
}

public void setOutputDir(File outputDir) {
this.outputDir = outputDir;
}

private String generateFileName(){
// Get the current timestamp
LocalDateTime currentTime = LocalDateTime.now();
// Define the format for the timestamp
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd_HHmmss");
// Return the timestamp as a string
return currentTime.format(formatter);
}
}

+ 7
- 5
app/src/main/java/com/example/ueberwachungssystem/Detection/DetectionReport.java View File

@@ -9,24 +9,26 @@ public class DetectionReport {
public String timeStamp;
public String detectionType;
public float detectedValue;
public String detectorID;
public boolean detectionState;

public DetectionReport(String detectorID, String detectionType, float detectedAmplitude) {
public DetectionReport(boolean detectionState, String detectionType, float detectedAmplitude) {
this.timeStamp = String.valueOf(Calendar.getInstance().getTime());
this.detectionType = detectionType;
this.detectedValue = detectedAmplitude;
this.detectorID = detectorID;
this.detectionState = detectionState;

//this.detectorID = detectorID;
}


/** Get Detection Report in String format */
public String toString() {
String state = "State: " + "[" + this.detectionState + "]";
String time = "Time: " + "[" + this.timeStamp + "]";
String type = "Type: " + "[" + this.detectionType + "]";
String value = "Value: " + "[" + this.detectedValue + "]";
String id = "ID: " + "[" + this.detectorID + "]";

return String.join("\t", time, type, value, id);
return String.join("\t", state, time, type, value);
}

/** Debug Report */

+ 43
- 5
app/src/main/java/com/example/ueberwachungssystem/Detection/Detector.java View File

@@ -1,10 +1,19 @@
package com.example.ueberwachungssystem.Detection;

import android.os.CountDownTimer;

import androidx.annotation.NonNull;
import androidx.camera.core.ExperimentalGetImage;


abstract public class Detector {
private OnDetectionListener listener;
private boolean isDetecting = false;
private boolean extendViolation = false;

// Countdown parameters
private final int COUNTDOWN_TIME = 10000; // milliseconds
private final int COUNTDOWN_POLLING_TIME = 100; // milliseconds

/** Constructor - takes context of current activity */
public Detector() {}
@@ -18,17 +27,46 @@ abstract public class Detector {
this.listener = listener;
}


/** Triggers onDetectionListener - call this to trigger violation/alarm */
public void reportViolation(String detectorID, String detectionType, float amplitude) {
public void reportViolation(String detectionType, float amplitude) {
if (listener != null) {
DetectionReport detectionReport = new DetectionReport(detectorID, detectionType, amplitude);
listener.onDetection(detectionReport);
if (!isDetecting) {
isDetecting = true;
DetectionReport detectionReport = new DetectionReport(true, detectionType, amplitude);
listener.onDetection(detectionReport);
startDetectionTimer(detectionType, amplitude);
} else {
extendViolation = true;
}
} else {
throw new IllegalStateException("No listener set for violation reporting");
isDetecting = false;
extendViolation = false;
}
}

private void startDetectionTimer(String detectionType, float amplitude) {
isDetecting = true;
new CountDownTimer((long) COUNTDOWN_TIME, COUNTDOWN_POLLING_TIME) {
@Override
public void onTick(long millisUntilFinished) {
if (extendViolation) {
extendViolation = false;
startDetectionTimer(detectionType, amplitude);
this.cancel();
}
}
@Override
public void onFinish() {
isDetecting = false;
DetectionReport detectionReport = new DetectionReport(false, detectionType, amplitude);
listener.onDetection(detectionReport);
}
}.start();
}

public void extendViolation(){
this.extendViolation = true;
}

/** Starts Detection (abstract method: needs to be overridden in child class) */
public abstract void startDetection();

+ 174
- 0
app/src/main/java/com/example/ueberwachungssystem/Detection/DetectorService.java View File

@@ -0,0 +1,174 @@
package com.example.ueberwachungssystem.Detection;

import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
import android.widget.ImageView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.camera.core.ExperimentalGetImage;
import androidx.lifecycle.LifecycleService;

import com.example.ueberwachungssystem.WifiCommunication;

import java.io.File;

@ExperimentalGetImage
public class DetectorService extends LifecycleService {
public ServiceBinder serviceBinder = new ServiceBinder();
private DetectorService.OnDetectionListener listener;
private boolean isServiceRunning = false;

VideoDetector videoDetector = null;
AudioRecorder audioRecorder = null;

/** Communication **/

WifiCommunication wifiCommunication;

StringBuffer dataFromWifi;

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (isServiceRunning)
return START_NOT_STICKY;


// Setup Service classes:
videoDetector = new VideoDetector(this);
videoDetector.setOnDetectionListener(new Detector.OnDetectionListener() {
@Override
public void onDetection(@NonNull DetectionReport detectionReport) {
passToServiceListener(detectionReport);
}
});

audioRecorder = new AudioRecorder(this);



isServiceRunning = true;

wifiCommunication = new WifiCommunication (1234);
wifiCommunication.setOnConnectionListener(new WifiCommunication.OnConnectionListener() {
@Override
public void onConnection(StringBuffer data) {
dataFromWifi = data;
}
});
return super.onStartCommand(intent, flags, startId);
}
@Override
public void onDestroy() {
super.onDestroy();
isServiceRunning = false;
}

/** Service methods */
public class ServiceBinder extends Binder {
public DetectorService getBoundService() {
// Return an instance of the TestService
return DetectorService.this;
}
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
super.onBind(intent);
return serviceBinder;
}


/** Video Detection */
public void startVideoDetection() {
if(videoDetector != null)
videoDetector.startDetection();
}
public void stopVideoDetection() {
if(videoDetector != null)
videoDetector.stopDetection();
}
public boolean isVideoDetectionRunning() {
if(videoDetector != null)
return videoDetector.isDetecting();
return false;
}
public void debugVideoProcessing(ImageView input, ImageView output) {
if(videoDetector != null)
videoDetector.debugProcessing(input, output);
}

/** Audio Detection */
public void startAudioDetection() {

}
public void stopAudioDetection() {

}

/** Motion Detection */
public void startMotionDetection() {

}
public void stopMotionDetection() {

}

/** Video Recording */
public void startVideoRecording() {
if(videoDetector != null)
videoDetector.startRecording();
}
public void stopVideoRecording() {
if(videoDetector != null)
videoDetector.stopRecording();
}
public boolean isVideoRecordingRunning() {
if(videoDetector != null)
return videoDetector.isRecording();
return false;
}
public void setVideoRecordingDir(File outputDir) {
if (videoDetector != null)
videoDetector.setOutputDir(outputDir);
}

/** Audio Recording */
public void startAudioRecording() {
if(audioRecorder != null)
audioRecorder.startRecording();
}
public void stopAudioRecording() {
if(audioRecorder != null)
audioRecorder.stopRecording();
}
public boolean isAudioRecordingRunning() {
if(videoDetector != null)
return audioRecorder.isRecording();
return false;
}
public void setAudioRecordingDir(File outputDir) {
if (audioRecorder != null)
audioRecorder.setOutputDir(outputDir);
}


/** pass Detection Report to Service Detection Listener and trigger it */
public void passToServiceListener(DetectionReport detectionReport) {
if (listener != null) {
listener.onDetection(detectionReport);
}
}


/** On Detection Listener - runs when violation is reported */
public interface OnDetectionListener {
void onDetection(@NonNull DetectionReport detectionReport);
}
public void setOnDetectionListener(@NonNull DetectorService.OnDetectionListener listener) {
this.listener = listener;
}
}

+ 382
- 0
app/src/main/java/com/example/ueberwachungssystem/Detection/MicrophoneDetector.java View File

@@ -0,0 +1,382 @@
package com.example.ueberwachungssystem.Detection;

import static java.lang.Math.*;

import android.Manifest;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageManager;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.AsyncTask;
import android.util.Log;

import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex;
import com.example.ueberwachungssystem.Detection.Signalverarbeitung.FFT;
import com.example.ueberwachungssystem.Detection.DetectionReport;
import com.example.ueberwachungssystem.Detection.Detector;

public class MicrophoneDetector extends Detector {
/**
* Constructor - takes context of current activity
*
* @param context
*/

private static final int RECHTEANFORDERUNG_MIKROFON = 1;

private AufnahmeTask aufnahmeTask;
public boolean armed = false;
public int Schwellwert_Alarm = 100;
private Context context;

public MicrophoneDetector(Context context) {
super();
this.context = context;
}

@Override
public void startDetection() {
aufnahmeTask = new AufnahmeTask();
aufnahmeTask.execute();
}

@Override
public void stopDetection() {
if (aufnahmeTask != null) {
aufnahmeTask.cancel(true);
}
}

class AufnahmeTask extends AsyncTask<Long, Verarbeitungsergebnis, Void> {
private AudioRecord recorder;
private final int sampleRateInHz = 44100;
private final int channelConfig = AudioFormat.CHANNEL_IN_MONO;
private final int audioFormat = AudioFormat.ENCODING_PCM_16BIT;
private int minPufferGroesseInBytes;
private int pufferGroesseInBytes;
private RingPuffer ringPuffer = new RingPuffer(10);
private float kalibierWert;
private com.example.ueberwachungssystem.Detection.DetectionReport detectionReport;

@SuppressLint("MissingPermission")
AufnahmeTask() {
minPufferGroesseInBytes = AudioRecord.getMinBufferSize(sampleRateInHz, channelConfig, audioFormat);
pufferGroesseInBytes = minPufferGroesseInBytes * 2;
try {
recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRateInHz, channelConfig, audioFormat, pufferGroesseInBytes);
} catch (Exception e) {
e.printStackTrace();
}
Log.d("0","Puffergroeße: "+ minPufferGroesseInBytes + " " + pufferGroesseInBytes);
Log.d("0","Recorder (SR, CH): "+ recorder.getSampleRate() + " " + recorder.getChannelCount());

int anzahlBytesProAbtastwert;
String s;
switch (recorder.getAudioFormat()) {
case AudioFormat.ENCODING_PCM_8BIT:
s = "8 Bit PCM ";
anzahlBytesProAbtastwert = 1;
break;
case AudioFormat.ENCODING_PCM_16BIT:
s = "16 Bit PCM";
anzahlBytesProAbtastwert = 2;
break;
case AudioFormat.ENCODING_PCM_FLOAT:
s = "Float PCM";
anzahlBytesProAbtastwert = 4;
break;
default:
throw new IllegalArgumentException();
}

switch (recorder.getChannelConfiguration()) {
case AudioFormat.CHANNEL_IN_MONO:
s = "Mono";
break;
case AudioFormat.CHANNEL_IN_STEREO:
s = "Stereo";
anzahlBytesProAbtastwert *= 2;
break;
case AudioFormat.CHANNEL_INVALID:
s = "ungültig";
break;
default:
throw new IllegalArgumentException();
}

Log.d("0","Konfiguration: "+ s);

int pufferGroesseInAnzahlAbtastwerten = pufferGroesseInBytes / anzahlBytesProAbtastwert;

}

@Override
protected Void doInBackground(Long... params) {
recorder.startRecording();
short[] puffer = new short[pufferGroesseInBytes / 2];
long lastTime = System.currentTimeMillis();
float verarbeitungsrate = 0;
final int maxZaehlerZeitMessung = 10;
int zaehlerZeitMessung = 0;
int anzahlVerarbeitet = 0;
GleitenderMittelwert gleitenderMittelwert = new GleitenderMittelwert(0.3f);

//Kalibrierung
try {
Thread.sleep(3000); // Time to lay down the phone
} catch (InterruptedException e) {
e.printStackTrace();
}
int i = 0;
for (i = 0; i < 20; i++) {
int n = recorder.read(puffer, 0, puffer.length);
Verarbeitungsergebnis kalibrierErgebnis = verarbeiten(puffer, n);
kalibierWert += kalibrierErgebnis.maxAmp;
try {
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
kalibierWert = kalibierWert/i;

// __Part of FFT__
// Complex[] zeitSignal = new Complex[puffer.length];
// for (int j = 0; j < puffer.length; j++) {
// zeitSignal[j] = new Complex(puffer[j], 0);
// }
// Complex[] spektrum = FFT.fft(zeitSignal);
// double[] spektrum = calculateFFT(puffer);
// DataPoint AddPoint;
// LineGraphSeries<DataPoint> series = new LineGraphSeries<DataPoint>(new DataPoint[]{});
// for (i = 0; i < spektrum.length; i++) {
// AddPoint = new DataPoint(i, spektrum[i]);
// series.appendData(AddPoint, true, spektrum.length);
// }
// graph.addSeries(series);

for (; ; ) {
if (aufnahmeTask.isCancelled()) {
break;
} else {
int n = recorder.read(puffer, 0, puffer.length);
Verarbeitungsergebnis ergebnis = verarbeiten(puffer, n);
anzahlVerarbeitet += n;

// __Part of FFT__
// spektrum = calculateFFT(puffer);
// LineGraphSeries<DataPoint> newseries = new LineGraphSeries<DataPoint>(new DataPoint[]{});
// for (i = 0; i < spektrum.length; i++) {
// AddPoint = new DataPoint(i, spektrum[i]);
// newseries.appendData(AddPoint, true, spektrum.length);
// }

zaehlerZeitMessung++;
if (zaehlerZeitMessung == maxZaehlerZeitMessung) {
long time = System.currentTimeMillis();
long deltaTime = time - lastTime;
verarbeitungsrate = 1000.0f * anzahlVerarbeitet / deltaTime;
verarbeitungsrate = gleitenderMittelwert.mittel(verarbeitungsrate);
zaehlerZeitMessung = 0;
anzahlVerarbeitet = 0;
lastTime = time;
}


ergebnis.verarbeitungsrate = (int) verarbeitungsrate;
publishProgress(ergebnis);

try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
recorder.release();
return null;
}

private Verarbeitungsergebnis verarbeiten(short[] daten, int n) {
String status;
short maxAmp = -1;
if (n == AudioRecord.ERROR_INVALID_OPERATION) {
status = "ERROR_INVALID_OPERATION";
} else if (n == AudioRecord.ERROR_BAD_VALUE) {
status = "ERROR_BAD_VALUE";
} else {
status = "OK";
short max = 0;
for (int i = 0; i < n; i++) {
if (daten[i] > max) {
max = daten[i];
}
}

ringPuffer.hinzufuegen(max);
maxAmp = ringPuffer.maximum();
if (maxAmp <= Schwellwert_Alarm+kalibierWert) {
armed = true;
}
}

return new Verarbeitungsergebnis(status, maxAmp, 0);
}

@Override
protected void onProgressUpdate(Verarbeitungsergebnis... progress) {
super.onProgressUpdate(progress);
float maxAmpPrint = round(20*log10(abs(progress[0].maxAmp/1.0)));
float kalibierWertPrint = round(20*log10(abs(kalibierWert)));
Log.d("0","VR, Max, Kal:" + progress[0].verarbeitungsrate + ", " + maxAmpPrint
+ " dB, " + kalibierWertPrint + " dB");

if (progress[0].maxAmp >= Schwellwert_Alarm+kalibierWert && armed == true) {
armed = false;
detectionReport = new DetectionReport(true, "Audio", maxAmpPrint);
reportViolation("Audio", maxAmpPrint);
Log.d("1",detectionReport.toString());
}
}
}

private double[] calculateFFT(short[] zeitsignal)
{
byte signal[] = new byte[zeitsignal.length];
// loops through all the values of a Short
for (int i = 0; i < zeitsignal.length-1; i++) {
signal[i] = (byte) (zeitsignal[i]);
signal[i+1] = (byte) (zeitsignal[i] >> 8);
}

final int mNumberOfFFTPoints =1024;

double temp;
Complex[] y;
Complex[] complexSignal = new Complex[mNumberOfFFTPoints];
double[] absSignal = new double[mNumberOfFFTPoints/2];

for(int i = 0; i < mNumberOfFFTPoints; i++){
temp = (double)((signal[2*i] & 0xFF) | (signal[2*i+1] << 8)) / 32768.0F;
complexSignal[i] = new Complex(temp,0.0);
}

y = FFT.fft(complexSignal);

for(int i = 0; i < (mNumberOfFFTPoints/2); i++)
{
absSignal[i] = y[i].abs();
}

return absSignal;

}

class Verarbeitungsergebnis {
String status;
short maxAmp;
int verarbeitungsrate;
Verarbeitungsergebnis(String status, short maxAmp, int verarbeitungsrate) {
this.status = status;
this.maxAmp = maxAmp;
this.verarbeitungsrate = verarbeitungsrate;
}
}

class RingPuffer {
private short[] puffer;
private final int laenge;
private int anzahlEnthaltenerDaten;
private int position;

public RingPuffer(int n) {
laenge = n;
anzahlEnthaltenerDaten = 0;
position = 0;
puffer = new short[laenge];
}

public void hinzufuegen(short wert) {
puffer[position] = wert;
position++;
if (position >= laenge) {
position = 0;
}
if (anzahlEnthaltenerDaten < laenge) {
anzahlEnthaltenerDaten++;
}
}

public void hinzufuegen(short[] daten) {
for (short d : daten) {
puffer[position] = d;
position++;
if (position >= laenge) {
position = 0;
}
}
if (anzahlEnthaltenerDaten < laenge) {
anzahlEnthaltenerDaten += daten.length;
if (anzahlEnthaltenerDaten >= laenge) {
anzahlEnthaltenerDaten = laenge;
}
}
}

public short maximum() {
short max = 0;
for (int i = 0; i < anzahlEnthaltenerDaten; i++) {
if (puffer[i] > max) {
max = puffer[i];
}
}
return max;
}

public float mittelwert() {
float summe = 0;
for (int i = 0; i < anzahlEnthaltenerDaten; i++) {
summe += puffer[i];
}
return summe / anzahlEnthaltenerDaten;
}
}

class GleitenderMittelwert {
private final float wichtungNeuerWert;
private final float wichtungAlterWert;
private float mittelwert = 0;
private boolean istMittelwertGesetzt = false;

GleitenderMittelwert(float wichtungNeuerWert) {
this.wichtungNeuerWert = wichtungNeuerWert;
this.wichtungAlterWert = 1 - this.wichtungNeuerWert;
}

float MittelwertPuffer(short[] puffer) {

for (int i = 0; i < puffer.length; i++) {
mittelwert = Math.abs(puffer[i]);
}
mittelwert = mittelwert/puffer.length;

return mittelwert;
}

float mittel(float wert) {
if (istMittelwertGesetzt) {
mittelwert = wert * wichtungNeuerWert + mittelwert * wichtungAlterWert;
} else {
mittelwert = wert;
istMittelwertGesetzt = true;
}
return mittelwert;
}
}
}

+ 109
- 0
app/src/main/java/com/example/ueberwachungssystem/Detection/OpenCVHelper.java View File

@@ -0,0 +1,109 @@
package com.example.ueberwachungssystem.Detection;

import android.graphics.Bitmap;
import android.media.Image;
import android.widget.ImageView;

import androidx.annotation.NonNull;
import androidx.camera.core.ExperimentalGetImage;
import androidx.camera.core.ImageProxy;

import org.opencv.android.Utils;
import org.opencv.core.Core;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.MatOfPoint;
import org.opencv.core.Scalar;
import org.opencv.core.Size;
import org.opencv.imgproc.Imgproc;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;


@ExperimentalGetImage
public class OpenCVHelper {

/** OpenCV helper methods **/
public static Mat addGaussianBlur(Mat inputMat, Size kernelSize){
Mat outputMat = new Mat();
Imgproc.GaussianBlur(inputMat, outputMat, kernelSize, 0);
return outputMat;
}

public static Mat addBlur(Mat inputMat, Size kernelSize){
Mat outputMat = new Mat();
Imgproc.blur(inputMat, outputMat, kernelSize);
return outputMat;
}

public static Mat extractYChannel(@NonNull ImageProxy imgProxy) {
Image img = imgProxy.getImage();

assert img != null;
ByteBuffer yBuffer = img.getPlanes()[0].getBuffer();
byte[] yData = new byte[yBuffer.remaining()];
yBuffer.get(yData);

Mat yMat = new Mat(img.getHeight(), img.getWidth(), CvType.CV_8UC1);
yMat.put(0, 0, yData);

return yMat;
}

public static Mat thresholdPixels(Mat inputMat, Mat previousImage, int threshold){
Mat diffImage = new Mat();
Core.absdiff(inputMat, previousImage, diffImage);
Mat binaryMat = new Mat();
Imgproc.threshold(diffImage, binaryMat, threshold, 255, Imgproc.THRESH_BINARY);
return binaryMat;
}


public static Mat thresholdContourArea(Mat inputMat, float areaThreshold){
List<MatOfPoint> contours = new ArrayList<>();
Mat hierarchy = new Mat();
Imgproc.findContours(inputMat, contours, hierarchy, Imgproc.RETR_EXTERNAL, Imgproc.CHAIN_APPROX_SIMPLE);

Mat outputMat = new Mat(inputMat.size(), inputMat.type(), new Scalar(0));
// Iterate over the contours and draw only the larger contours on the outputMat
for (MatOfPoint contour : contours) {
double contourArea = Imgproc.contourArea(contour);
if (contourArea > areaThreshold) {
Imgproc.drawContours(outputMat, Collections.singletonList(contour), 0, new Scalar(255), -1);
}
}
// Apply the outputMat as a mask to the dilatedImage
Mat maskedImage = new Mat();
inputMat.copyTo(maskedImage, outputMat);
return outputMat;
}

public static Mat dilateBinaryMat(Mat inputMat, Size kernelSize){
Mat dilatedMat = new Mat();
Mat kernel = Imgproc.getStructuringElement(Imgproc.MORPH_ELLIPSE, kernelSize);
Imgproc.dilate(inputMat, dilatedMat, kernel);
return dilatedMat;
}

public static int countNonZeroPixels(Mat inputImage) {
if (inputImage != null)
return Core.countNonZero(inputImage);
else
return 0;
}


public static void debugMat(Mat mat, ImageView imageView) {
if (imageView == null || mat == null)
return;

Bitmap bitmap = Bitmap.createBitmap(mat.cols(), mat.rows(), Bitmap.Config.ARGB_8888);
Utils.matToBitmap(mat, bitmap);

// Display the bitmap in an ImageView
imageView.setImageBitmap(bitmap);
}
}

+ 148
- 0
app/src/main/java/com/example/ueberwachungssystem/Detection/Signalverarbeitung/Complex.java View File

@@ -0,0 +1,148 @@
package com.example.ueberwachungssystem.Detection.Signalverarbeitung;

import java.util.Objects;

public class Complex {
private final double re; // the real part
private final double im; // the imaginary part

// create a new object with the given real and imaginary parts
public Complex(double real, double imag) {
re = real;
im = imag;
}

// return a string representation of the invoking com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex object
public String toString() {
if (im == 0) return re + "";
if (re == 0) return im + "i";
if (im < 0) return re + " - " + (-im) + "i";
return re + " + " + im + "i";
}

// return abs/modulus/magnitude
public double abs() {
return Math.hypot(re, im);
}

// return angle/phase/argument, normalized to be between -pi and pi
public double phase() {
return Math.atan2(im, re);
}

// return a new com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex object whose value is (this + b)
public Complex plus(Complex b) {
Complex a = this; // invoking object
double real = a.re + b.re;
double imag = a.im + b.im;
return new Complex(real, imag);
}

// return a new com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex object whose value is (this - b)
public Complex minus(Complex b) {
Complex a = this;
double real = a.re - b.re;
double imag = a.im - b.im;
return new Complex(real, imag);
}

// return a new com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex object whose value is (this * b)
public Complex times(Complex b) {
Complex a = this;
double real = a.re * b.re - a.im * b.im;
double imag = a.re * b.im + a.im * b.re;
return new Complex(real, imag);
}

// return a new object whose value is (this * alpha)
public Complex scale(double alpha) {
return new Complex(alpha * re, alpha * im);
}

// return a new com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex object whose value is the conjugate of this
public Complex conjugate() {
return new Complex(re, -im);
}

// return a new com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex object whose value is the reciprocal of this
public Complex reciprocal() {
double scale = re * re + im * im;
return new Complex(re / scale, -im / scale);
}

// return the real or imaginary part
public double re() {
return re;
}

public double im() {
return im;
}

// return a / b
public Complex divides(Complex b) {
Complex a = this;
return a.times(b.reciprocal());
}

// return a new com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex object whose value is the complex exponential of this
public Complex exp() {
return new Complex(Math.exp(re) * Math.cos(im), Math.exp(re) * Math.sin(im));
}

// return a new com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex object whose value is the complex sine of this
public Complex sin() {
return new Complex(Math.sin(re) * Math.cosh(im), Math.cos(re) * Math.sinh(im));
}

// return a new com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex object whose value is the complex cosine of this
public Complex cos() {
return new Complex(Math.cos(re) * Math.cosh(im), -Math.sin(re) * Math.sinh(im));
}

// return a new com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex object whose value is the complex tangent of this
public Complex tan() {
return sin().divides(cos());
}

// a static version of plus
public static Complex plus(Complex a, Complex b) {
double real = a.re + b.re;
double imag = a.im + b.im;
Complex sum = new Complex(real, imag);
return sum;
}

// See Section 3.3.
public boolean equals(Object x) {
if (x == null) return false;
if (this.getClass() != x.getClass()) return false;
Complex that = (Complex) x;
return (this.re == that.re) && (this.im == that.im);
}

// See Section 3.3.
public int hashCode() {
return Objects.hash(re, im);
}

// sample client for testing
public static void main(String[] args) {
Complex a = new Complex(5.0, 6.0);
Complex b = new Complex(-3.0, 4.0);

System.out.println("a = " + a);
System.out.println("b = " + b);
System.out.println("Re(a) = " + a.re());
System.out.println("Im(a) = " + a.im());
System.out.println("b + a = " + b.plus(a));
System.out.println("a - b = " + a.minus(b));
System.out.println("a * b = " + a.times(b));
System.out.println("b * a = " + b.times(a));
System.out.println("a / b = " + a.divides(b));
System.out.println("(a / b) * b = " + a.divides(b).times(b));
System.out.println("conj(a) = " + a.conjugate());
System.out.println("|a| = " + a.abs());
System.out.println("tan(a) = " + a.tan());
}
}

+ 246
- 0
app/src/main/java/com/example/ueberwachungssystem/Detection/Signalverarbeitung/FFT.java View File

@@ -0,0 +1,246 @@
package com.example.ueberwachungssystem.Detection.Signalverarbeitung;
// Source: https://introcs.cs.princeton.edu/java/97data/FFT.java.html

/******************************************************************************
* Compilation: javac FFT.java
* Execution: java FFT n
* Dependencies: com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex.java
*
* Compute the FFT and inverse FFT of a length n complex sequence
* using the radix 2 Cooley-Tukey algorithm.
* Bare bones implementation that runs in O(n log n) time and O(n)
* space. Our goal is to optimize the clarity of the code, rather
* than performance.
*
* This implementation uses the primitive root of unity w = e^(-2 pi i / n).
* Some resources use w = e^(2 pi i / n).
*
* Reference: https://www.cs.princeton.edu/~wayne/kleinberg-tardos/pdf/05DivideAndConquerII.pdf
*
* Limitations
* -----------
* - assumes n is a power of 2
*
* - not the most memory efficient algorithm (because it uses
* an object type for representing complex numbers and because
* it re-allocates memory for the subarray, instead of doing
* in-place or reusing a single temporary array)
*
* For an in-place radix 2 Cooley-Tukey FFT, see
* https://introcs.cs.princeton.edu/java/97data/InplaceFFT.java.html
*
******************************************************************************/

public class FFT {

// compute the FFT of x[], assuming its length n is a power of 2
public static Complex[] fft(Complex[] x) {
int n = x.length;

// base case
if (n == 1) return new Complex[]{x[0]};

// radix 2 Cooley-Tukey FFT
if (n % 2 != 0) {
throw new IllegalArgumentException("n is not a power of 2");
}

// compute FFT of even terms
Complex[] even = new Complex[n / 2];
for (int k = 0; k < n / 2; k++) {
even[k] = x[2 * k];
}
Complex[] evenFFT = fft(even);

// compute FFT of odd terms
Complex[] odd = even; // reuse the array (to avoid n log n space)
for (int k = 0; k < n / 2; k++) {
odd[k] = x[2 * k + 1];
}
Complex[] oddFFT = fft(odd);

// combine
Complex[] y = new Complex[n];
for (int k = 0; k < n / 2; k++) {
double kth = -2 * k * Math.PI / n;
Complex wk = new Complex(Math.cos(kth), Math.sin(kth));
y[k] = evenFFT[k].plus(wk.times(oddFFT[k]));
y[k + n / 2] = evenFFT[k].minus(wk.times(oddFFT[k]));
}
return y;
}


// compute the inverse FFT of x[], assuming its length n is a power of 2
public static Complex[] ifft(Complex[] x) {
int n = x.length;
Complex[] y = new Complex[n];

// take conjugate
for (int i = 0; i < n; i++) {
y[i] = x[i].conjugate();
}

// compute forward FFT
y = fft(y);

// take conjugate again
for (int i = 0; i < n; i++) {
y[i] = y[i].conjugate();
}

// divide by n
for (int i = 0; i < n; i++) {
y[i] = y[i].scale(1.0 / n);
}

return y;

}

// compute the circular convolution of x and y
public static Complex[] cconvolve(Complex[] x, Complex[] y) {

// should probably pad x and y with 0s so that they have same length
// and are powers of 2
if (x.length != y.length) {
throw new IllegalArgumentException("Dimensions don't agree");
}

int n = x.length;

// compute FFT of each sequence
Complex[] a = fft(x);
Complex[] b = fft(y);

// point-wise multiply
Complex[] c = new Complex[n];
for (int i = 0; i < n; i++) {
c[i] = a[i].times(b[i]);
}

// compute inverse FFT
return ifft(c);
}


// compute the linear convolution of x and y
public static Complex[] convolve(Complex[] x, Complex[] y) {
Complex ZERO = new Complex(0, 0);

Complex[] a = new Complex[2 * x.length];
for (int i = 0; i < x.length; i++) a[i] = x[i];
for (int i = x.length; i < 2 * x.length; i++) a[i] = ZERO;

Complex[] b = new Complex[2 * y.length];
for (int i = 0; i < y.length; i++) b[i] = y[i];
for (int i = y.length; i < 2 * y.length; i++) b[i] = ZERO;

return cconvolve(a, b);
}

// compute the DFT of x[] via brute force (n^2 time)
public static Complex[] dft(Complex[] x) {
int n = x.length;
Complex ZERO = new Complex(0, 0);
Complex[] y = new Complex[n];
for (int k = 0; k < n; k++) {
y[k] = ZERO;
for (int j = 0; j < n; j++) {
int power = (k * j) % n;
double kth = -2 * power * Math.PI / n;
Complex wkj = new Complex(Math.cos(kth), Math.sin(kth));
y[k] = y[k].plus(x[j].times(wkj));
}
}
return y;
}

// display an array of com.example.ueberwachungssystem.Detection.Signalverarbeitung.Complex numbers to standard output
public static void show(Complex[] x, String title) {
System.out.println(title);
System.out.println("-------------------");
for (int i = 0; i < x.length; i++) {
System.out.println(x[i]);
}
System.out.println();
}

/***************************************************************************
* Test client and sample execution
*
* % java FFT 4
* x
* -------------------
* -0.03480425839330703
* 0.07910192950176387
* 0.7233322451735928
* 0.1659819820667019
*
* y = fft(x)
* -------------------
* 0.9336118983487516
* -0.7581365035668999 + 0.08688005256493803i
* 0.44344407521182005
* -0.7581365035668999 - 0.08688005256493803i
*
* z = ifft(y)
* -------------------
* -0.03480425839330703
* 0.07910192950176387 + 2.6599344570851287E-18i
* 0.7233322451735928
* 0.1659819820667019 - 2.6599344570851287E-18i
*
* c = cconvolve(x, x)
* -------------------
* 0.5506798633981853
* 0.23461407150576394 - 4.033186818023279E-18i
* -0.016542951108772352
* 0.10288019294318276 + 4.033186818023279E-18i
*
* d = convolve(x, x)
* -------------------
* 0.001211336402308083 - 3.122502256758253E-17i
* -0.005506167987577068 - 5.058885073636224E-17i
* -0.044092969479563274 + 2.1934338938072244E-18i
* 0.10288019294318276 - 3.6147323062478115E-17i
* 0.5494685269958772 + 3.122502256758253E-17i
* 0.240120239493341 + 4.655566391833896E-17i
* 0.02755001837079092 - 2.1934338938072244E-18i
* 4.01805098805014E-17i
*
***************************************************************************/

public static void main(String[] args) {
int n = Integer.parseInt(args[0]);
Complex[] x = new Complex[n];

// original data
for (int i = 0; i < n; i++) {
x[i] = new Complex(i, 0);
}
show(x, "x");

// FFT of original data
Complex[] y = fft(x);
show(y, "y = fft(x)");

// FFT of original data
Complex[] y2 = dft(x);
show(y2, "y2 = dft(x)");

// take inverse FFT
Complex[] z = ifft(y);
show(z, "z = ifft(y)");

// circular convolution of x with itself
Complex[] c = cconvolve(x, x);
show(c, "c = cconvolve(x, x)");

// linear convolution of x with itself
Complex[] d = convolve(x, x);
show(d, "d = convolve(x, x)");
}
}



+ 236
- 105
app/src/main/java/com/example/ueberwachungssystem/Detection/VideoDetector.java View File

@@ -1,196 +1,327 @@
package com.example.ueberwachungssystem.Detection;

import android.Manifest;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.pm.PackageManager;
import android.graphics.ImageFormat;
import android.media.Image;
import android.util.Size;
import android.os.CountDownTimer;
import android.util.Log;
import android.view.Display;
import android.view.Surface;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.camera.core.CameraSelector;
import androidx.camera.core.ExperimentalGetImage;
import androidx.camera.core.ImageAnalysis;
import androidx.camera.core.ImageProxy;
import androidx.camera.core.Preview;
import androidx.camera.core.VideoCapture;
import androidx.camera.lifecycle.ProcessCameraProvider;
import androidx.camera.view.PreviewView;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.lifecycle.LifecycleOwner;

import com.google.common.util.concurrent.ListenableFuture;

import java.nio.ByteBuffer;
import org.opencv.android.OpenCVLoader;
import org.opencv.core.Mat;
import org.opencv.core.Size;

import java.io.File;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.concurrent.ExecutionException;


/**
* Video Detector inherits some methods from abstract Detector class (more info there)
*
*
* USE FROM MAIN ACTIVITY:
*
* VideoDetector vd = new VideoDetector(this);
* vd.setPreview(previewView); //THIS IS OPTIONAL!
* vd.setOnDetectionListener(new Detector.OnDetectionListener{...});
* vd.startDetection();
* vd.stopDetection
*
* */


@ExperimentalGetImage
public class VideoDetector extends Detector {

// Calling Activity
private final Context context;

// Camera Provider
private ProcessCameraProvider cameraProvider;
private Boolean isDetectionRunning = false;
// Preview Camera Image
private PreviewView previewView = null;
// Detect Violation
private static final float PIXEL_THRESHOLD = 30f; // Luminosity (brightness channel of YUV_420_888)
private static final float ALARM_THRESHOLD = 0.2f; // Percent of pixels changed
private ByteBuffer previousBuffer = null;
private ImageAnalysis imageAnalysis;
private VideoCapture videoCapture;
//private Preview preview;

// Logic
private boolean isDetecting = false;
private boolean isRecording = false;
private boolean allowReportViolation = false;

// Image Processing
private Mat previousImage = null;

/**
* Constructor
* @param context: the context of calling activity (usually "this")
* */
// Debugging
private ImageView inputImageView = null;
private ImageView outputImageView = null;

// Recorder
private File outputDir; // Default: in app files directory


// Parameters
private static final float ALARM_THRESHOLD = 0f; // Percent of pixels changed
private static final float AREA_THRESHOLD = 10f;
private static final int DILATE_ITERATIONS = 2;
private static final float START_DELAY = 20000; // milliseconds
private static final android.util.Size IMAGE_RES = new android.util.Size(640, 480);



/** Constructor */
public VideoDetector(Context context) {
super();
this.context = context;
this.imageAnalysis = setupImageAnalysis();
this.videoCapture = setupVideoCapture();
this.outputDir = context.getFilesDir();
//this.preview = new Preview.Builder().build();
}

/** Get States */
public boolean isDetecting() {
return isDetecting;
}
public boolean isRecording(){
return isRecording;
}

/**
* Starts the Video Detection
* */

/** Starts the Video Detection */
@Override
public void startDetection() {
if (isDetectionRunning)
// Check States
if (isDetecting)
return;
// Request Camera Provider
// Configure Image Analysis
imageAnalysis = setupImageAnalysis();
// Open CV startup check
if (!OpenCVLoader.initDebug()) {
Log.e("OpenCV", "Unable to load OpenCV!");
return;
} else
Log.d("OpenCV", "OpenCV loaded Successfully!");
// Get Process Camera Provider and start
final ListenableFuture<ProcessCameraProvider> cameraProviderFuture = ProcessCameraProvider.getInstance(context);
//Check for Camera availability
cameraProviderFuture.addListener(() -> {
try {
cameraProvider = cameraProviderFuture.get();
bindAnalysis(cameraProvider);
isDetectionRunning = true;
previousBuffer = null;
} catch (ExecutionException | InterruptedException e) {
// No errors need to be handled for this Future. This should never be reached.
}
},ContextCompat.getMainExecutor(context));
isDetecting = true;
bindCameraProvider();
} catch (ExecutionException | InterruptedException e) {}
}, ContextCompat.getMainExecutor(context));
// Disable Violation Calling for Setup Time
startViolationTimer(START_DELAY);
}

/** Starts the Recorder */
@SuppressLint("RestrictedApi")
public void startRecording() {
// Check States
if (isRecording){
return;
}

/**
* Stops the Video Detection
* */
videoCapture = setupVideoCapture();

final ListenableFuture<ProcessCameraProvider> cameraProviderFuture = ProcessCameraProvider.getInstance(context);
cameraProviderFuture.addListener(() -> {
try {
cameraProvider = cameraProviderFuture.get();
isRecording = true;
bindCameraProvider();

File vidFile = new File(context.getFilesDir() + "/" + generateFileName() + ".mp4");
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
return;
}
videoCapture.startRecording(
new VideoCapture.OutputFileOptions.Builder(vidFile).build(),
context.getMainExecutor(),
new VideoCapture.OnVideoSavedCallback() {
@Override
public void onVideoSaved(@NonNull VideoCapture.OutputFileResults outputFileResults) {
isRecording = false;
Toast.makeText(context, "video recording saved", Toast.LENGTH_SHORT).show();
}
@Override
public void onError(int videoCaptureError, @NonNull String message, @Nullable Throwable cause) {
isRecording = false;
Toast.makeText(context, "video recording failed", Toast.LENGTH_SHORT).show();
}
}
);
} catch (ExecutionException | InterruptedException ignored) {}
}, ContextCompat.getMainExecutor(context));
}

/** Stops the Video Detection */
@Override
public void stopDetection() {
if (!isDetectionRunning)
if (!isDetecting || imageAnalysis == null)
return;
cameraProvider.unbindAll();
isDetectionRunning = false;
cameraProvider.unbind(imageAnalysis);
isDetecting = false;
allowReportViolation = false;
}

/** Stops the Recording */
@SuppressLint("RestrictedApi")
public void stopRecording(){
if(!isRecording)
return;

/**
* Set PreviewView to show video feed while detecting
* this is optional and does not need to be called
* */
public void setPreviewView(PreviewView previewView) {
this.previewView = previewView;
videoCapture.stopRecording();
cameraProvider.unbind(videoCapture);
isRecording = false;
}

/** Bind Camera Provider */
private void bindCameraProvider() {
// Specify which Camera to use
CameraSelector cameraSelector = new CameraSelector.Builder().requireLensFacing(CameraSelector.LENS_FACING_BACK).build();
cameraProvider.unbindAll();
cameraProvider.bindToLifecycle((LifecycleOwner) context, cameraSelector, imageAnalysis, videoCapture);
}

/**
* Binds the Luminosity Analyzer (configure and run Analysis)
* @param cameraProvider: CameraProvider of Context passed by Constructor
* */
private void bindAnalysis(@NonNull ProcessCameraProvider cameraProvider) {
/** Setup Use Cases */
private ImageAnalysis setupImageAnalysis() {
// Configure and create Image Analysis
ImageAnalysis.Builder builder = new ImageAnalysis.Builder();
builder.setTargetResolution(new Size(640, 480));
builder.setTargetResolution(IMAGE_RES);
builder.setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST);
builder.setOutputImageFormat(ImageAnalysis.OUTPUT_IMAGE_FORMAT_YUV_420_888);
builder.setTargetRotation(Surface.ROTATION_90);
ImageAnalysis imageAnalysis = builder.build();

// Set Analyzer
imageAnalysis.setAnalyzer(ContextCompat.getMainExecutor(context), imageProxy -> {
if (imageProxy.getFormat() == ImageFormat.YUV_420_888) {
Image image = imageProxy.getImage();
assert image != null;

// Changed Pixel Detection
int pixelChanged = getChangedPixelCount(image);
int width = image.getWidth();
int height = image.getHeight();
// Violation Handling
Mat processed = processImage(imageProxy);

float percentPixelChanged = (float) 100f * pixelChanged / (width * height);
int n = OpenCVHelper.countNonZeroPixels(processed);
int pixelCount = image.getWidth() * image.getHeight();
float percentChanged = (float) n / pixelCount;

if (percentPixelChanged > ALARM_THRESHOLD)
reportViolation("0", "Video", percentPixelChanged);
// Violation Condition
if (percentChanged * 100 > ALARM_THRESHOLD) {
if (allowReportViolation)
reportViolation("Video", percentChanged);
}
}
imageProxy.close();
});
// Create Preview
Preview preview = new Preview.Builder().build();
// Specify which Camera to use
CameraSelector cameraSelector = new CameraSelector.Builder().requireLensFacing(CameraSelector.LENS_FACING_BACK).build();
// Update PreviewView if set
if (previewView != null)
preview.setSurfaceProvider(previewView.getSurfaceProvider());
return imageAnalysis;
}

@SuppressLint("RestrictedApi")
private VideoCapture setupVideoCapture() {
int rotation = getDisplayRotation();
return new VideoCapture.Builder()
.setTargetRotation(rotation)
.build();
}

cameraProvider.bindToLifecycle((LifecycleOwner) context, cameraSelector, imageAnalysis, preview);
/** Process Image to be used for Motion Detection */
private Mat processImage(ImageProxy imageProxy){
if (imageProxy == null)
return null;
// Image Transformation
Mat imageMat = OpenCVHelper.extractYChannel(imageProxy);
// Show Input Image
if (inputImageView != null)
OpenCVHelper.debugMat(imageMat, inputImageView);
// Preprocess Image
Mat preprocessed = imageMat;
preprocessed = OpenCVHelper.addGaussianBlur(preprocessed, new Size(21, 21));
preprocessed = OpenCVHelper.addBlur(preprocessed, new Size(3, 3));
// Set Previous Image
if (previousImage == null) {
previousImage = preprocessed;
return null;
}
// Process Image
Mat processed = preprocessed.clone();
processed = OpenCVHelper.thresholdPixels(processed, previousImage, 25);

for(int i = 0; i < DILATE_ITERATIONS; i++)
processed = OpenCVHelper.dilateBinaryMat(processed, new Size(3,3));

processed = OpenCVHelper.thresholdContourArea(processed, AREA_THRESHOLD);
// Output
previousImage = preprocessed.clone();
// Show Output Image
if (outputImageView != null)
OpenCVHelper.debugMat(processed, outputImageView);
return processed;
}


/** Debug input and result of processing */
public void debugProcessing(@NonNull ImageView inputImageView, @NonNull ImageView outputImageView){
this.inputImageView = inputImageView;
this.outputImageView = outputImageView;
}

/**
* Calculate Amount of Pixels changed using a threshold
* @param image
* */
private int getChangedPixelCount(Image image) {
Image.Plane[] planes = image.getPlanes();
ByteBuffer buffer = planes[0].getBuffer();

if (previousBuffer == null) {
previousBuffer = ByteBuffer.allocate(buffer.capacity());
buffer.rewind();
previousBuffer.put(buffer);
previousBuffer.rewind();
return 0;
}
private void setPreviewView(@NonNull PreviewView previewView) {
// Create Preview
if (this.preview != null)
this.preview.setSurfaceProvider(previewView.getSurfaceProvider());
}
*/

int width = image.getWidth();
int height = image.getHeight();

int yRowStride = image.getPlanes()[0].getRowStride();
int yPixelStride = image.getPlanes()[0].getPixelStride();
/** Generate File Name */
private String generateFileName(){
// Get the current timestamp
LocalDateTime currentTime = LocalDateTime.now();
// Define the format for the timestamp
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd_HHmmss");
// Return the timestamp as a string
return currentTime.format(formatter);
}

int changedPixelCount = 0;

// Count changed pixels
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; x++) {
int index = (y * yRowStride) + (x * yPixelStride);
int luminosity = (buffer.get(index) & 0xff);
int previousLuminosity = (previousBuffer.get(index) & 0xff);
int diff = Math.abs(luminosity - previousLuminosity);
if (diff > PIXEL_THRESHOLD)
changedPixelCount++;
}
}
/** Get current Display Rotation */
private int getDisplayRotation() {
WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = windowManager.getDefaultDisplay();
return display.getRotation();
}

// Reset and copy Byte Buffer
buffer.rewind();
previousBuffer.rewind();
previousBuffer.put(buffer);
/** Start delay until Violation Report is allowed */
private void startViolationTimer(float setupTime) {
new CountDownTimer((long) (START_DELAY), 100) {
@Override
public void onTick(long millisUntilFinished) {
}
@Override
public void onFinish() {
allowReportViolation = true;
}
}.start();
}

return changedPixelCount;
public void setOutputDir(File outputDir) {
this.outputDir = outputDir;
}
}
}

+ 43
- 0
app/src/main/java/com/example/ueberwachungssystem/PermissionHandler.java View File

@@ -0,0 +1,43 @@
package com.example.ueberwachungssystem;


import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageManager;
import android.widget.Toast;

import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

public class PermissionHandler {
private final Context context;
private static final int PERMISSION_REQUEST_CODE = 23409;
private static final String[] permissions = new String[]{
android.Manifest.permission.CAMERA,
android.Manifest.permission.RECORD_AUDIO
};

public PermissionHandler(Context context) {
this.context = context;
}

public boolean hasPermissions() {
boolean permissionState = true;
for (String permission: permissions) {
permissionState = permissionState && ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED;
}
return permissionState;
}

public void getPermissions() {
if (!hasPermissions())
ActivityCompat.requestPermissions((Activity) context, permissions, PERMISSION_REQUEST_CODE);
}

public void showPermissionToast() {
if (hasPermissions())
Toast.makeText(context, "permissions available", Toast.LENGTH_SHORT).show();
else
Toast.makeText(context, "permissions missing", Toast.LENGTH_SHORT).show();
}
}

+ 48
- 0
app/src/main/java/com/example/ueberwachungssystem/PermissionRequest.java View File

@@ -0,0 +1,48 @@
package com.example.ueberwachungssystem;

import static android.Manifest.permission.INTERNET;
import static android.Manifest.permission.CAMERA;
import static android.Manifest.permission.RECORD_AUDIO;

import android.content.pm.PackageManager;
import android.os.Handler;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;

public class PermissionRequest extends AppCompatActivity{
private static final int PERMISSION_REQUEST_CODE = 123;
private final MainActivity mainActivity;

Handler handler = new Handler();

public PermissionRequest(MainActivity mainActivity) {
this.mainActivity = mainActivity;
}

public StringBuilder rechtePruefen() {
boolean rechtKamera = ContextCompat.checkSelfPermission(mainActivity, CAMERA) == PackageManager.PERMISSION_GRANTED;
boolean rechtMikrofon = ContextCompat.checkSelfPermission(mainActivity, RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED;
boolean rechtInternet = ContextCompat.checkSelfPermission(mainActivity, INTERNET) == PackageManager.PERMISSION_GRANTED;
StringBuilder sb = new StringBuilder();
sb.append("Rechte prüfen:")
.append("\nKamera: ").append(rechtKamera)
.append("\nMikrofon: ").append(rechtMikrofon)
.append("\nInternet: ").append(rechtInternet);
//mainActivity.runOnUiThread(() -> mainActivity.tvMessages.setText(sb));
if (!(rechtKamera && rechtMikrofon && rechtInternet)){
handler.post(new Runnable() {
@Override
public void run() {
Toast.makeText(mainActivity.getApplicationContext(),"Es werden Rechte benötigt", Toast.LENGTH_LONG).show();
}
});
}
return sb;
}

public void rechteAnfordern() {
mainActivity.requestPermissions(new String[]{CAMERA, RECORD_AUDIO, INTERNET}, PERMISSION_REQUEST_CODE);
}
}

+ 86
- 0
app/src/main/java/com/example/ueberwachungssystem/PopUpClass.java View File

@@ -0,0 +1,86 @@
package com.example.ueberwachungssystem;

import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.PopupWindow;
import android.widget.TextView;

public class PopUpClass {
private final MainActivity mainActivity;

PermissionRequest permission;
TextView PopUpText;


public PopUpClass(MainActivity mainActivity) {
this.mainActivity = mainActivity;
permission = new PermissionRequest(mainActivity);
}

//PopupWindow display method

public void showPopupWindow(final View view) {


//Create a View object yourself through inflater
LayoutInflater inflater = (LayoutInflater) view.getContext().getSystemService(view.getContext().LAYOUT_INFLATER_SERVICE);
View popupView = inflater.inflate(R.layout.popup_window, null);

//Specify the length and width through constants
int width = LinearLayout.LayoutParams.WRAP_CONTENT;
int height = LinearLayout.LayoutParams.WRAP_CONTENT;

//Make Inactive Items Outside Of PopupWindow
boolean focusable = true;

//Create a window with our parameters
final PopupWindow popupWindow = new PopupWindow(popupView,width*1, height*1, focusable);

//Set the location of the window on the screen
popupWindow.showAtLocation(view, Gravity.CENTER, 0, 0);

//Initialize the elements of our window, install the handler

PopUpText = popupView.findViewById(R.id.titleText);

Button buttonEdit = popupView.findViewById(R.id.RechteAnfordern);
buttonEdit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
RechteAnfordern();
}
});

//Handler for clicking on the inactive zone of the window

popupView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {

//Close the window when clicked
popupWindow.dismiss();
return true;
}
});
}
public void RechtePrüfen(){
StringBuilder Text = permission.rechtePruefen();
PopUpText.setText(Text);
}
public void RechteAnfordern(){
permission.rechteAnfordern();
StringBuilder Text = permission.rechtePruefen();
PopUpText.setText(Text);
}
public void Sensoren(){
PopUpText.setText("Es können 3 verschiedene Sensoren verwendet werden \n -1. Beschleunigungssensor\n -2. Mikrofon\n -3. Kamera");
}
public void Impressum(){
PopUpText.setText("Die Ueberwachungsapp wurde im Rahmen eines Praktikums der TH-Nürnberg programmiert");
}

}

+ 33
- 18
app/src/main/java/com/example/ueberwachungssystem/WifiCommunication.java View File

@@ -1,5 +1,12 @@
package com.example.ueberwachungssystem;
import android.annotation.SuppressLint;
import android.widget.Toast;

import androidx.annotation.NonNull;

import com.example.ueberwachungssystem.Detection.DetectionReport;
import com.example.ueberwachungssystem.Detection.Detector;
import com.example.ueberwachungssystem.Detection.DetectorService;

import java.io.IOException;
import java.net.DatagramPacket;
@@ -14,7 +21,7 @@ import java.util.Date;
import java.util.Enumeration;

public class WifiCommunication {
private final MainActivity mainActivity;
//private final MainActivity mainActivity;
private final InetAddress address;
private final int port;

@@ -22,9 +29,11 @@ public class WifiCommunication {
volatile private boolean send;
private final DatagramSocket socket;
volatile private boolean running;

private OnConnectionListener listener;
@SuppressLint("SetTextI18n")
public WifiCommunication(MainActivity mainActivity, int port) {
this.mainActivity = mainActivity;
public WifiCommunication(int port) {
//this.mainActivity = mainActivity;
this.port = port;
try {
socket = new DatagramSocket(this.port);
@@ -37,8 +46,23 @@ public class WifiCommunication {
} catch (SocketException | UnknownHostException e) {
throw new RuntimeException(e);
}
//Toast.makeText(mainActivity.getApplicationContext(),"Communication running", Toast.LENGTH_SHORT).show();
//mainActivity.runOnUiThread(() -> mainActivity.tvMessages.setText("Communication running"));
}

public interface OnConnectionListener {
void onConnection(StringBuffer data);
}
public void setOnConnectionListener(@NonNull OnConnectionListener listener) {
this.listener = listener;
}

public void sendWifiData(StringBuffer wifiMessage) {
if (listener != null) {
listener.onConnection(wifiMessage);
}
}

private class ReceiveThread extends Thread {
private StringBuffer rxStringBuffer = new StringBuffer();
private String rxString="";
@@ -49,20 +73,16 @@ public class WifiCommunication {
try {
do {
byte[] receiveData = new byte[512];
InetAddress fromAdress;
int fromPort;
DatagramPacket rxPacket = new DatagramPacket(receiveData, receiveData.length);
socket.receive(rxPacket);
fromAdress = rxPacket.getAddress();
fromPort = rxPacket.getPort();
rxString = new String(rxPacket.getData());
if(!previousRxString.equals(rxString)) {
rxString = new String(receiveData, 0, rxPacket.getLength());
String[] splitrxString = rxString.split(",");
if(!previousRxString.equals(rxString) && splitrxString[0].equals("1") && splitrxString.length==7) {
rxStringBuffer.append(rxString).append("\n");
sendWifiData(rxStringBuffer);
//mainActivity.runOnUiThread(() -> mainActivity.tvMessages.setText(rxStringBuffer));
previousRxString = rxString;
}


} while (running);
}
catch (IOException e) {
@@ -83,18 +103,13 @@ public class WifiCommunication {
Date curDate = new Date(System.currentTimeMillis());
String str = formatter.format(curDate);
byte[] send_Data = new byte[512];
String txString = (str+ ",Gruppe2," + getLocalIpAddress() + ",An,Video," +messageToSend);
String txString = ("1," +str+ ",Gruppe2," + getLocalIpAddress() + ",An,Video," +messageToSend);
send_Data = txString.getBytes();

DatagramPacket txPacket = new DatagramPacket(send_Data, txString.length(), address, port);

for(int i = 0; i < 500; i++) {
for(int i = 0; i < 300; i++) {
socket.send(txPacket);
/*try{
sleep(10);
}catch (InterruptedException e){
e.printStackTrace();
}*/
}
}
} while (running);

+ 29
- 0
app/src/main/res/layout/popup_window.xml View File

@@ -0,0 +1,29 @@
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:gravity="center"
android:background="#A5ACB2">

<TextView
android:id="@+id/titleText"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textStyle="italic"
android:padding="10dp"/>

<Button
android:id="@+id/RechteAnfordern"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Rechte Anfordern" />



</LinearLayout>

+ 9
- 0
app/src/main/res/menu/options_menu.xml View File

@@ -0,0 +1,9 @@
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:id="@+id/Rechteverwaltung"
android:title="Rechteverwaltung" />
<item android:id="@+id/Sensoren"
android:title="Sensoren" />
<item android:id="@+id/Impressum"
android:title="Impressum" />
</menu>

+ 2
- 2
build.gradle View File

@@ -1,5 +1,5 @@
// Top-level build file where you can add configuration options common to all sub-projects/modules.
plugins {
id 'com.android.application' version '7.4.2' apply false
id 'com.android.library' version '7.4.2' apply false
id 'com.android.application' version '8.0.0' apply false
id 'com.android.library' version '8.0.0' apply false
}

+ 3
- 1
gradle.properties View File

@@ -18,4 +18,6 @@ android.useAndroidX=true
# Enables namespacing of each library's R class so that its R class includes only the
# resources declared in the library itself and none from the library's dependencies,
# thereby reducing the size of the R class for that library
android.nonTransitiveRClass=true
android.nonTransitiveRClass=true
android.defaults.buildfeatures.buildconfig=true
android.nonFinalResIds=false

+ 1
- 1
gradle/wrapper/gradle-wrapper.properties View File

@@ -1,6 +1,6 @@
#Thu May 11 15:19:24 CEST 2023
distributionBase=GRADLE_USER_HOME
distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
distributionUrl=https\://services.gradle.org/distributions/gradle-8.0-bin.zip
distributionPath=wrapper/dists
zipStorePath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME

+ 1
- 0
settings.gradle View File

@@ -14,3 +14,4 @@ dependencyResolutionManagement {
}
rootProject.name = "Ueberwachungssystem"
include ':app'
include ':app'

Write Preview
Loading…
Cancel
Save