Exemple #1
0
 public SampleAggregator(int fftLength = 1024)
 {
     if (!IsPowerOfTwo(fftLength))
     {
         throw new ArgumentException("FFT Length must be a power of two");
     }
     this.m              = (int)Math.Log(fftLength, 2.0);
     this.fftLength      = fftLength;
     this.fftBuffer      = new Complex[fftLength];
     this.fftArgs        = new FftEventArgs(fftBuffer);
     this.fftBufferQueue = new Queue <Complex>(fftLength);
     this.bffFull        = false;
 }
Exemple #2
0
        void FftCalculated(object sender, FftEventArgs e)
        {
            double sumFreq1 = 0;
            double sumFreq2 = 0;
            double sumFreq3 = 0;
            double temp     = 0;

            FftChart.Series[fft].Points.Clear();
            for (var i = 0; i < e.Result.Length / 2; i++)
            {
                temp = Math.Sqrt(e.Result[i].X * e.Result[i].X + e.Result[i].Y * e.Result[i].Y);
                if (i < 3)
                {
                    sumFreq1 = sumFreq1 + temp;
                }
                else if (i < 10)
                {
                    sumFreq2 = sumFreq2 + temp;
                }
                else
                {
                    sumFreq3 = sumFreq3 + temp;
                }

                FftChart.Series[fft].Points.AddY(temp);
            }
            if (counter2 > 100)
            {
                SumFreq1Chart.Series[sumFreq1series].Points.Remove(SumFreq1Chart.Series[sumFreq1series].Points.First());
                SumFreq2Chart.Series[sumFreq2series].Points.Remove(SumFreq2Chart.Series[sumFreq2series].Points.First());
                SumFreq3Chart.Series[sumFreq3series].Points.Remove(SumFreq3Chart.Series[sumFreq3series].Points.First());
            }
            else
            {
                counter2++;
            }
            SumFreq1Chart.Series[sumFreq1series].Points.AddY(sumFreq1);
            SumFreq2Chart.Series[sumFreq2series].Points.AddY(sumFreq2);
            SumFreq3Chart.Series[sumFreq3series].Points.AddY(sumFreq3);
        }