public int Read(float[] data, int offset, int count)
{
int samplesRemaining = count;
while (samplesRemaining > 0)
{
int samplesRequested = Math.Min(BUFFER_SIZE, samplesRemaining);
int samplesRead = stream.Read(buffer, 0, samplesRequested);
if (samplesRead <= 0)
{
break;
}
for (int i = 0; i < samplesRead; i++)
{
data[offset + i] = (float)buffer[i].Real;
}
samplesRemaining -= samplesRead;
offset += samplesRead;
}
return(count - samplesRemaining);
}
/// <summary> Slowest Backup Alternative for calculating RMS </summary>
public static double CalculateRMS(this IAnalyticStream stream)
{
if (stream.Samples == 0)
{
return(0.0);
}
if (stream.Samples == int.MaxValue)
{
return(double.NaN);
}
double rms = 0.0;
int readSamples;
const int BUFFER_SIZE = 512;
Complex64[] buffer = new Complex64[BUFFER_SIZE];
stream.Reset();
do
{
readSamples = stream.Read(buffer, 0, BUFFER_SIZE);
for (int i = 0; i < readSamples; i++)
{
rms += buffer[i].Real * buffer[i].Real;
}
}while (readSamples > 0);
stream.Reset();
return(Math.Sqrt(rms / stream.Samples));
}