private static void KissSpeedTest(int bufferSize)
{
var cfg = KissFFT.Alloc(bufferSize, 0);
var input = MakeData(bufferSize);
var output = new Single.Complex[bufferSize];
double sum = 0;
long count = 0;
var start = DateTime.Now;
while ((DateTime.Now - start).TotalMilliseconds < 1000)
{
KissFFT.FFT(cfg, input, output);
sum += output[0].Real;
count++;
}
sum = sum / count;
Console.WriteLine("KISS; FFT; {0}; {1}; {2}", bufferSize, count, sum);
cfg = KissFFT.Alloc(bufferSize, 1);
sum = 0;
count = 0;
start = DateTime.Now;
while ((DateTime.Now - start).TotalMilliseconds < 1000)
{
KissFFT.FFT(cfg, output, input);
sum += input[0].Real;
count++;
}
sum = sum / count;
Console.WriteLine("KISS; IFFT; {0}; {1}; {2}", bufferSize, count, sum);
}
static void TransformNativeSpeedTest(int bufferSize)
{
var input = MakeData(bufferSize);
var output = new Single.Complex[bufferSize];
var fft = new Single.TransformNative(bufferSize);
double sum = 0;
long count = 0;
var start = DateTime.Now;
while ((DateTime.Now - start).TotalMilliseconds < 1000)
{
fft.FFT(input, output);
sum += output[0].Real;
count++;
}
sum = sum / count;
Console.WriteLine("Native; FFT; {0}; {1}; {2}", bufferSize, count, sum);
sum = 0;
count = 0;
start = DateTime.Now;
while ((DateTime.Now - start).TotalMilliseconds < 1000)
{
fft.IFFT(output, input);
sum += input[0].Real;
count++;
}
sum = sum / count;
Console.WriteLine("Native; IFFT; {0}; {1}; {2}", bufferSize, count, sum);
}
static Single.Complex[] MakeData(int bufferSize)
{
var arr = new Single.Complex[bufferSize];
for (int j = 0; j < bufferSize; j++)
{
arr[j].Real = j / (float)bufferSize;
}
return(arr);
}