private static void TestFastDctLeeInvertibility()
{
for (int len = 1; len <= (1 << 22); len *= 2)
{
double[] vector = RandomVector(len);
double[] temp = (double[])vector.Clone();
FastDctLee.Transform(temp);
FastDctLee.InverseTransform(temp);
for (int i = 0; i < temp.Length; i++)
{
temp[i] /= len / 2.0;
}
AssertArrayEquals(vector, temp, EPSILON);
}
}
/*---- Test suite ----*/
private static void TestFastDctLeeVsNaive()
{
for (int len = 1; len <= (1 << 13); len *= 2)
{
double[] vector = RandomVector(len);
double[] expect = NaiveDct.Transform(vector);
double[] actual = (double[])vector.Clone();
FastDctLee.Transform(actual);
AssertArrayEquals(expect, actual, EPSILON);
expect = NaiveDct.InverseTransform(vector);
actual = (double[])vector.Clone();
FastDctLee.InverseTransform(actual);
AssertArrayEquals(expect, actual, EPSILON);
}
}