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added HighPass2

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This commit is contained in:
Ahmet Inan 2019-03-31 15:32:33 +02:00
commit d44f88352c
1 changed files with 17 additions and 0 deletions
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17
filter.hh
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@ -56,6 +56,23 @@ public:
}
};
template <typename TYPE>
class HighPass2
{
int num, den;
TYPE fac;
public:
HighPass2(int num, int den) : num(num), den(den), fac(TYPE(2*num)/TYPE(den)) {}
TYPE operator () (int n, int N)
{
int twox = 2 * n - (N - 1);
return !twox ? TYPE(1) - fac :
UnitCircle<TYPE>::sin(twox % 4, 4) / (Const<TYPE>::HalfPi() * TYPE(twox))
- fac * UnitCircle<TYPE>::sin((twox * num) % (2 * den), 2 * den) /
(Const<TYPE>::HalfPi() * fac * TYPE(twox));
}
};
template <typename TYPE>
class BandPass
{