Android Open Source - geoar-app Low Pass Sensor Buffer

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License

The source code is released under:

Apache License

Java Source Code

/**
 * Copyright 2012 52North Initiative for Geospatial Open Source Software GmbH
 *//ww  w.  j av a 2 s.  c o  m
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.n52.geoar.tracking.location;


/**
 * 
 * Simple low pass filter for sensor data
 * 
 * @author Holger Hopmann
 * 
 */
public class LowPassSensorBuffer extends SensorBuffer {
  private float[] buffer;

  public LowPassSensorBuffer(int dataLength, float alpha) {
    super(dataLength);
    this.alpha = alpha;
    buffer = new float[dataLength];
  }

  private float alpha;
  private boolean hasValues;

  public void put(float[] sensordata) {
    for (int i = 0; i < dataLength; i++) {
      buffer[i] = alpha * sensordata[i] + (1 - alpha) * buffer[i];
    }
    hasValues = true;
  }

  public float[] get() {
    return buffer;
  }

  public boolean hasValues() {
    return hasValues;
  }
}

Java Source Code List

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