@SuppressWarnings("unused")
private static double[] lowPassFilter(
double[] values, double interval, double lowFreq, double highFreq) {
double tau = 1 / interval; // Back to seconds...
double dt = 1.0 / lowFreq;
double a = tau / (tau + dt);
double last = values[0];
double[] newValues = new double[values.length];
for (int i = 0; i < newValues.length; i++) {
last = XYZBasicFrequencyFeature.weightedSmoothing(values[i], last, a);
newValues[i] = last;
}
return newValues;
}
protected void processData(final Context context, Bundle dataBundle) {
if (dataBundle.containsKey(ContinuousProbe.EVENT_TIMESTAMP)
&& dataBundle.containsKey("X")
&& dataBundle.containsKey("Y")
&& dataBundle.containsKey("Z")) {
double[] incomingTimes = dataBundle.getDoubleArray(ContinuousProbe.EVENT_TIMESTAMP);
float[] incomingX = dataBundle.getFloatArray("X");
float[] incomingY = dataBundle.getFloatArray("Y");
float[] incomingZ = dataBundle.getFloatArray("Z");
this.appendValues(incomingX, incomingY, incomingZ, incomingTimes);
final long now = System.currentTimeMillis();
final String key = this.featureKey();
final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
long updateInterval =
Long.parseLong(
prefs.getString(
"config_probe_" + key + "_frequency",
XYZBasicFrequencyFeature.DEFAULT_FREQUENCY))
* 1000;
if (now - this._lastUpdate > updateInterval) // add last updated
// check for config
{
this._lastUpdate = now;
LinearInterpolator interpolator = new LinearInterpolator();
double[] xs = _xValues;
double[] ys = _yValues;
double[] zs = _zValues;
double[] ts = _timestamps;
if (this._currentIndex < BUFFER_SIZE - 1) {
xs = Arrays.copyOfRange(_xValues, 0, this._currentIndex);
ys = Arrays.copyOfRange(_yValues, 0, this._currentIndex);
zs = Arrays.copyOfRange(_zValues, 0, this._currentIndex);
ts = Arrays.copyOfRange(_timestamps, 0, this._currentIndex);
}
// Log.e("PR", "FIRST RAW TIME: " + ts[0] + " LAST RAW TIME: " +
// ts[ts.length - 1]);
// Log.e("PR", "RAW TIME[0]: " + ts[0]);
// Log.e("PR", "RAW TIME[1]: " + ts[1]);
PolynomialSplineFunction fX = interpolator.interpolate(ts, xs);
PolynomialSplineFunction fY = interpolator.interpolate(ts, ys);
PolynomialSplineFunction fZ = interpolator.interpolate(ts, zs);
// double lowFreq = 0.6;
// double highFreq = 7.0;
double durationOffset = ts[0];
double bufferDuration = ts[ts.length - 1] - durationOffset;
double interval = 1.0 / 120.0;
// Log.e("PR", "TS/0: " + ts[0] + " -- TS/-1: " + ts[ts.length -
// 1] + " -- LEN TS: " + ts.length);
// Log.e("PR", "BD: " + bufferDuration + " INT: " + interval);
int twoPow = ts.length == 0 ? 0 : (32 - Integer.numberOfLeadingZeros(ts.length - 1));
int bufferSize = (int) Math.pow(2, twoPow);
// Log.e("PR", "BUFF SIZE: " + bufferSize);
final double[] _interX = new double[bufferSize];
final double[] _interY = new double[bufferSize];
final double[] _interZ = new double[bufferSize];
Arrays.fill(_interX, 0.0);
Arrays.fill(_interY, 0.0);
Arrays.fill(_interZ, 0.0);
interTimes = new double[bufferSize];
for (int i = 0; i < bufferSize; i++) {
interTimes[i] = durationOffset + (i * interval);
// Log.e("PR", "TIME REQUEST: " + time);
// Log.e("PR", "TIME DIFFERENCE: " + (oldTime - time));
if (interTimes[i] > ts[ts.length - 1]) // If the current
// timestamp is
// greater than the
// last recorded
// timestamp, set it
// to the last
// timestamp
interTimes[i] = ts[ts.length - 1];
_interX[i] = fX.value(interTimes[i]);
_interY[i] = fY.value(interTimes[i]);
_interZ[i] = fZ.value(interTimes[i]);
}
// double timeDifference = interTimes[bufferSize - 1] -
// interTimes[0];
// Log.e("PR", "INTERP TIME: " + timeDifference +
// " BUFFER SIZE: " + bufferSize);
// Log.e("PR", "FIRST INTERP TIME: " + interTimes[0] +
// " LAST INTERP TIME: " + interTimes[interTimes.length - 1]);
// Log.e("PR", "INTERP SAMPLE: " + interX[bufferSize - 1] +
// " - " + interY[bufferSize - 1] + " - " + interZ[bufferSize -
// 1]);
final double[] _dynamicX = new double[_interX.length];
final double[] _dynamicY = new double[_interY.length];
final double[] _dynamicZ = new double[_interZ.length];
final double[] _staticX = new double[_interX.length];
final double[] _staticY = new double[_interY.length];
final double[] _staticZ = new double[_interZ.length];
for (int i = 0; i < _interX.length; i++) {
if (i < 2) {
_dynamicX[i] = 0;
_dynamicY[i] = 0;
_dynamicZ[i] = 0;
_staticX[i] = 0;
_staticY[i] = 0;
_staticZ[i] = 0;
} else {
if (i == _dynamicX.length - 1) {
_dynamicX[i] = XYZBasicFrequencyFeature.bpFilter(_interX, this._xBPHistory, i, "X");
_dynamicY[i] = XYZBasicFrequencyFeature.bpFilter(_interY, this._yBPHistory, i, "Y");
_dynamicZ[i] = XYZBasicFrequencyFeature.bpFilter(_interZ, this._zBPHistory, i, "Z");
_staticX[i] = XYZBasicFrequencyFeature.lpFilter(_interX, this._xLPHistory, i, "X");
_staticY[i] = XYZBasicFrequencyFeature.lpFilter(_interY, this._yLPHistory, i, "Y");
_staticZ[i] = XYZBasicFrequencyFeature.lpFilter(_interZ, this._zLPHistory, i, "Z");
} else {
_dynamicX[i] = XYZBasicFrequencyFeature.bpFilter(_interX, this._xBPHistory, i, null);
_dynamicY[i] = XYZBasicFrequencyFeature.bpFilter(_interY, this._yBPHistory, i, null);
_dynamicZ[i] = XYZBasicFrequencyFeature.bpFilter(_interZ, this._zBPHistory, i, null);
_staticX[i] = XYZBasicFrequencyFeature.lpFilter(_interX, this._xLPHistory, i, null);
_staticY[i] = XYZBasicFrequencyFeature.lpFilter(_interY, this._yLPHistory, i, null);
_staticZ[i] = XYZBasicFrequencyFeature.lpFilter(_interZ, this._zLPHistory, i, null);
}
this._xBPHistory[1] = this._xBPHistory[0];
this._xBPHistory[0] = _dynamicX[i];
this._yBPHistory[1] = this._yBPHistory[0];
this._yBPHistory[0] = _dynamicY[i];
this._zBPHistory[1] = this._zBPHistory[0];
this._zBPHistory[0] = _dynamicZ[i];
this._xLPHistory[1] = this._xLPHistory[0];
this._xLPHistory[0] = _staticX[i];
this._yLPHistory[1] = this._yLPHistory[0];
this._yLPHistory[0] = _staticY[i];
this._zLPHistory[1] = this._zLPHistory[0];
this._zLPHistory[0] = _staticZ[i];
}
}
// Log.e("PR", "Inter Sample: " + _interX[_interX.length - 1] +
// " - " + _interY[_interX.length - 1] + " - " +
// _interZ[_interX.length - 1]);
// Log.e("PR", "DY Sample: " + _dynamicX[_dynamicX.length - 1] +
// " - " + _dynamicY[_dynamicX.length - 1] + " - " +
// _dynamicZ[_interX.length - 1]);
// Log.e("PR", "GR Sample: " + _staticX[_staticX.length - 1] +
// " - " + _staticY[_staticY.length - 1] + " - " +
// _staticZ[_staticZ.length - 1]);
double observedFreq = _interX.length / bufferDuration; // (((double)
// this._currentIndex)
// /
// bufferDuration);
// Log.e("PR", "IL: + " + _interX.length + " / BD: " +
// bufferDuration);
// Log.e("PR", "OBS HZ: " + observedFreq);
FastFourierTransformer fft = new FastFourierTransformer(DftNormalization.STANDARD);
Complex[] xFFT = fft.transform(_dynamicX, TransformType.FORWARD);
Complex[] yFFT = fft.transform(_dynamicY, TransformType.FORWARD);
Complex[] zFFT = fft.transform(_dynamicZ, TransformType.FORWARD);
double[] frequencies =
XYZBasicFrequencyFeature.calculateFreqArray(_interX.length, observedFreq);
final double[] _xMaxFreqPowPair =
XYZBasicFrequencyFeature.findPeakFrequency(xFFT, frequencies);
final double[] _yMaxFreqPowPair =
XYZBasicFrequencyFeature.findPeakFrequency(yFFT, frequencies);
final double[] _zMaxFreqPowPair =
XYZBasicFrequencyFeature.findPeakFrequency(zFFT, frequencies);
// Log.e("PR", "FREQS & GEEKS: x:" + _xMaxFreqPowPair[0] + " - "
// + _xMaxFreqPowPair[1] + " y:" + _yMaxFreqPowPair[0] + " - " +
// _yMaxFreqPowPair[1] + " z:" + _zMaxFreqPowPair[0] + " - " +
// _zMaxFreqPowPair[1] );
final XYZBasicFrequencyFeature me = this;
Runnable r =
new Runnable() {
public void run() {
Bundle data = new Bundle();
data.putDouble("TIMESTAMP", now / 1000);
data.putString("PROBE", me.name(context));
boolean incInterpolated =
prefs.getBoolean(
"config_probe_" + key + "_interpolated_enabled",
XYZBasicFrequencyFeature.INTERPOLATED_ENABLED);
boolean incBandpass =
prefs.getBoolean(
"config_probe_" + key + "_bandpass_enabled",
XYZBasicFrequencyFeature.BANDPASS_ENABLED);
boolean incLowpass =
prefs.getBoolean(
"config_probe_" + key + "_lowpass_enabled",
XYZBasicFrequencyFeature.LOWPASS_ENABLED);
if (incInterpolated || incBandpass || incLowpass) {
Bundle sensorData = new Bundle();
synchronized (me) {
sensorData.putDoubleArray("INTERP_TIMESTAMPS", interTimes);
if (incInterpolated) {
sensorData.putDoubleArray("INTER_X", _interX);
sensorData.putDoubleArray("INTER_Y", _interY);
sensorData.putDoubleArray("INTER_Z", _interZ);
}
if (incBandpass) {
sensorData.putDoubleArray("DYNAMIC_X", _dynamicX);
sensorData.putDoubleArray("DYNAMIC_Y", _dynamicY);
sensorData.putDoubleArray("DYNAMIC_Z", _dynamicZ);
}
if (incLowpass) {
sensorData.putDoubleArray("STATIC_X", _staticX);
sensorData.putDoubleArray("STATIC_Y", _staticY);
sensorData.putDoubleArray("STATIC_Z", _staticZ);
}
data.putBundle("CALCULATIONS", sensorData);
}
}
data.putDouble("WINDOW_TIMESTAMP", interTimes[0]);
data.putDouble("POWER_X", _xMaxFreqPowPair[1]);
data.putDouble("POWER_Y", _yMaxFreqPowPair[1]);
data.putDouble("POWER_Z", _zMaxFreqPowPair[1]);
data.putDouble("FREQ_X", _xMaxFreqPowPair[0]);
data.putDouble("FREQ_Y", _yMaxFreqPowPair[0]);
data.putDouble("FREQ_Z", _zMaxFreqPowPair[0]);
me.transmitData(context, data);
}
};
Thread t = new Thread(r);
t.start();
}
}
}