static private void ReorderArray(double[] data)
{
Debug.Assert(data != null);
int length = data.Length / 2;
Debug.Assert(Fourier.IsPowerOf2(length) == true);
Debug.Assert(length >= cMinLength);
Debug.Assert(length <= cMaxLength);
int[] reversedBits = Fourier.GetReversedBits(Fourier.Log2(length));
for (int i = 0; i < length; i++)
{
int swap = reversedBits[i];
if (swap > i)
{
MathUtils.Swap(ref data[i << 1], ref data[swap << 1]);
MathUtils.Swap(ref data[i << 1 + 1], ref data[swap << 1 + 1]);
}
}
}
static private void ReorderArray(Complex[] data)
{
Debug.Assert(data != null);
int length = data.Length;
Debug.Assert(Fourier.IsPowerOf2(length) == true);
Debug.Assert(length >= cMinLength);
Debug.Assert(length <= cMaxLength);
int[] reversedBits = Fourier.GetReversedBits(Fourier.Log2(length));
for (int i = 0; i < length; i++)
{
int swap = reversedBits[i];
if (swap > i)
{
Complex temp = data[i];
data[i] = data[swap];
data[swap] = temp;
}
}
}