/**
* @return The list of feature vectors from the fileStream used by
* audioSource
*/
private List <float[]> GetFeatures()
{
List <float[]> ret = new List <float[]>();
try
{
int featureLength = -1;
IData feature = _frontEnd.GetData();
while (!(feature is DataEndSignal))
{
if (feature is DoubleData)
{
double[] featureData = ((DoubleData)feature).Values;
if (featureLength < 0)
{
featureLength = featureData.Length;
}
float[] convertedData = new float[featureData.Length];
for (int i = 0; i < featureData.Length; i++)
{
convertedData[i] = (float)featureData[i];
}
ret.Add(convertedData);
}
else if (feature is FloatData)
{
float[] featureData = ((FloatData)feature).Values;
if (featureLength < 0)
{
featureLength = featureData.Length;
}
ret.Add(featureData);
}
feature = _frontEnd.GetData();
}
}
catch (Exception e)
{
e.PrintStackTrace();
}
return(ret);
}
public bool Bandwidth(String file)
{
_source.SetAudioFile(file, "");
IData data;
var energy = new double[Bands];
while ((data = _frontend.GetData()) != null)
{
if (data is DoubleData)
{
double maxIntensity = LowIntensity;
double[] frame = ((DoubleData)data).Values;
for (int i = 0; i < Bands; i++)
{
maxIntensity = Math.Max(maxIntensity, frame[i]);
}
if (maxIntensity <= LowIntensity)
{
continue;
}
for (int i = 0; i < Bands; i++)
{
energy[i] = Math.Max(frame[i] / maxIntensity, energy[i]);
}
}
}
double maxLow = Max(energy, LowRangeStart, LowRangeEnd);
double maxHi = Max(energy, HighRangeStart, HighRangeEnd);
// System.out.format("%f %f\n", maxHi, maxLow);
// for (int i = 0; i < bands; i++)
// System.out.format("%.4f ", energy[i]);
// System.out.println();
if (maxHi < NoSignalLevel && maxLow > SignalLevel)
{
return(true);
}
return(false);
}
