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/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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.
*/
// Make values from a motion sensor (e.g., accelerometer) available as filter outputs.
package androidx.media.filterfw.samples.simplecamera;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.util.Log;
import androidx.media.filterfw.Filter;
import androidx.media.filterfw.FrameType;
import androidx.media.filterfw.FrameValue;
import androidx.media.filterfw.FrameValues;
import androidx.media.filterfw.MffContext;
import androidx.media.filterfw.OutputPort;
import androidx.media.filterfw.Signature;
public final class MotionSensorWTime extends Filter implements SensorEventListener {
private SensorManager mSensorManager = null;
private Sensor mSensor = null;
private float[] mValues = new float[3];
private float[][] mTemp = new float[3][3];
private float[] mAvgValues = new float[3];
private int mCounter = 0;
public MotionSensorWTime(MffContext context, String name) {
super(context, name);
}
@Override
public Signature getSignature() {
return new Signature()
.addOutputPort("values", Signature.PORT_REQUIRED, FrameType.array(float.class))
.addOutputPort("timestamp", Signature.PORT_OPTIONAL, FrameType.single(long.class))
.disallowOtherPorts();
}
@Override
protected void onPrepare() {
mSensorManager = (SensorManager)getContext().getApplicationContext()
.getSystemService(Context.SENSOR_SERVICE);
mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_LINEAR_ACCELERATION);
// TODO: currently, the type of sensor is hardcoded. Should be able to set the sensor
// type as filter input!
mSensorManager.registerListener(this, mSensor, SensorManager.SENSOR_DELAY_UI);
}
@Override
protected void onTearDown() {
mSensorManager.unregisterListener(this);
}
@Override
public final void onAccuracyChanged(Sensor sensor, int accuracy) {
// (Do we need to do something when sensor accuracy changes?)
}
@Override
public final void onSensorChanged(SensorEvent event) {
synchronized(mValues) {
mValues[0] = event.values[0];
mValues[1] = event.values[1];
mValues[2] = event.values[2];
}
}
@Override
protected void onProcess() {
OutputPort outPort = getConnectedOutputPort("values");
FrameValues outFrame = outPort.fetchAvailableFrame(null).asFrameValues();
synchronized(mValues) {
if (mCounter < 3 && mCounter >= 0) {
mTemp[0][mCounter] = mValues[0];
mTemp[1][mCounter] = mValues[1];
mTemp[2][mCounter] = mValues[2];
}
mCounter = (mCounter + 1) % 3;
mAvgValues[0] = (mTemp[0][0] + mTemp[0][1] + mTemp[0][2]) / 3;
mAvgValues[1] = (mTemp[1][0] + mTemp[1][1] + mTemp[1][2]) / 3;
mAvgValues[2] = (mTemp[2][0] + mTemp[2][1] + mTemp[2][2]) / 3;
outFrame.setValues(mAvgValues);
}
outFrame.setTimestamp(System.currentTimeMillis() * 1000000L);
outPort.pushFrame(outFrame);
OutputPort timeOutPort = getConnectedOutputPort("timestamp");
if (timeOutPort != null) {
long timestamp = System.nanoTime();
Log.v("MotionSensor", "Timestamp is: " + timestamp);
FrameValue timeStampFrame = timeOutPort.fetchAvailableFrame(null).asFrameValue();
timeStampFrame.setValue(timestamp);
timeOutPort.pushFrame(timeStampFrame);
}
}
}
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