/*
* Copyright 2008-2013, ETH Zürich, Samuel Welten, Michael Kuhn, Tobias Langner,
* Sandro Affentranger, Lukas Bossard, Michael Grob, Rahul Jain,
* Dominic Langenegger, Sonia Mayor Alonso, Roger Odermatt, Tobias Schlueter,
* Yannick Stucki, Sebastian Wendland, Samuel Zehnder, Samuel Zihlmann,
* Samuel Zweifel
*
* This file is part of Jukefox.
*
* Jukefox is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or any later version. Jukefox is
* distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* Jukefox. If not, see <http://www.gnu.org/licenses/>.
*/
package ch.ethz.dcg.pancho3.data.context;
import android.hardware.SensorEvent;
public class OrientationDataHandler extends FloatSensorDataHandler<SensorEvent> {
public static final String TAG = OrientationDataHandler.class
.getSimpleName();
public static final float MEAN_FACTOR = 0.999f;
public static final int AGGREGATION_TIME = 10 * 1000;
private Float tempValue = 0f;
private long tempValueTime = System.currentTimeMillis();
private int numTempValElements = 0;
private float[] lastVals = new float[3];
private boolean lastValsSet = false;
public void onNewEvent(SensorEvent event) {
if (event == null) {
return;
}
float x = Math.abs(event.values[0] - lastVals[0]);
float y = Math.abs(event.values[1] - lastVals[1]);
float z = Math.abs(event.values[2] - lastVals[2]);
Double energy = Math.sqrt(x * x + y * y + z * z);
long time = System.currentTimeMillis();
if (lastValsSet) {
if (time - tempValueTime > AGGREGATION_TIME) {
if (numTempValElements > 0) {
appendSensorData(tempValue / numTempValElements, time);
} else {
appendSensorData(energy.floatValue(), time);
}
numTempValElements = 1;
tempValue = energy.floatValue();
tempValueTime = time;
} else {
tempValue = tempValue + energy.floatValue();
numTempValElements++;
}
}
lastVals[0] = event.values[0];
lastVals[1] = event.values[1];
lastVals[2] = event.values[2];
lastValsSet = true;
// Log.v(TAG, "x: " + mean[0] + ", y: " + mean[1] + ", z: " + mean[2]);
}
}