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made methods const

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This commit is contained in:
Ahmet Inan 2021-04-01 12:32:02 +02:00
commit d7acee8494
2 changed files with 13 additions and 13 deletions
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12
filter.hh
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@ -18,7 +18,7 @@ class LowPass
TYPE f;
public:
LowPass(TYPE cutoff) : f(TYPE(2) * cutoff) {}
TYPE operator () (int n, int N)
TYPE operator () (int n, int N) const
{
TYPE x = TYPE(n) - TYPE(0.5) * TYPE(N - 1);
return f * sinc(f * x);
@ -32,7 +32,7 @@ class LowPass2
TYPE fac;
public:
LowPass2(int num, int den) : num(num), den(den), fac(TYPE(2*num)/TYPE(den)) {}
TYPE operator () (int n, int N)
TYPE operator () (int n, int N) const
{
int twox = 2 * n - (N - 1);
return !twox ? fac : fac *
@ -47,7 +47,7 @@ class HighPass
TYPE f;
public:
HighPass(TYPE cutoff) : f(TYPE(2) * cutoff) {}
TYPE operator () (int n, int N)
TYPE operator () (int n, int N) const
{
TYPE x = TYPE(n) - TYPE(0.5) * TYPE(N - 1);
// if (N%1) return delta(x) - f * sinc(f * x);
@ -63,7 +63,7 @@ class HighPass2
TYPE fac;
public:
HighPass2(int num, int den) : num(num), den(den), fac(TYPE(2*num)/TYPE(den)) {}
TYPE operator () (int n, int N)
TYPE operator () (int n, int N) const
{
int twox = 2 * n - (N - 1);
return !twox ? TYPE(1) - fac :
@ -80,7 +80,7 @@ class BandPass
public:
BandPass(TYPE cutoff0, TYPE cutoff1) :
f0(TYPE(2) * cutoff0), f1(TYPE(2) * cutoff1) {}
TYPE operator () (int n, int N)
TYPE operator () (int n, int N) const
{
TYPE x = TYPE(n) - TYPE(0.5) * TYPE(N - 1);
return f1 * sinc(f1 * x) - f0 * sinc(f0 * x);
@ -90,7 +90,7 @@ public:
template <typename TYPE>
struct HilbertTransform
{
TYPE operator () (int n, int N)
TYPE operator () (int n, int N) const
{
if (N&1) {
int x = n - (N - 1) / 2;

14
window.hh
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@ -16,13 +16,13 @@ namespace DSP {
template <typename TYPE>
struct Rect
{
TYPE operator () (int n, int N) { return n >= 0 && n < N ? 1 : 0; }
TYPE operator () (int n, int N) const { return n >= 0 && n < N ? 1 : 0; }
};
template <typename TYPE>
struct Hann
{
TYPE operator () (int n, int N)
TYPE operator () (int n, int N) const
{
return TYPE(0.5) * (TYPE(1) - UnitCircle<TYPE>::cos(n, N - 1));
}
@ -31,7 +31,7 @@ struct Hann
template <typename TYPE>
struct Hamming
{
TYPE operator () (int n, int N)
TYPE operator () (int n, int N) const
{
return TYPE(0.54) - TYPE(0.46) * UnitCircle<TYPE>::cos(n, N - 1);
}
@ -40,7 +40,7 @@ struct Hamming
template <typename TYPE>
struct Lanczos
{
TYPE operator () (int n, int N)
TYPE operator () (int n, int N) const
{
#if 0
return sinc(TYPE(2 * n) / TYPE(N - 1) - TYPE(1));
@ -60,7 +60,7 @@ public:
Blackman(TYPE a) : Blackman((TYPE(1) - a) / TYPE(2), TYPE(0.5), a / TYPE(2)) {}
// "exact Blackman"
Blackman() : Blackman(TYPE(7938) / TYPE(18608), TYPE(9240) / TYPE(18608), TYPE(1430) / TYPE(18608)) {}
TYPE operator () (int n, int N)
TYPE operator () (int n, int N) const
{
return a0 - a1 * UnitCircle<TYPE>::cos(n, N-1) + a2 * UnitCircle<TYPE>::cos((2*n)%(N-1), N-1);
}
@ -72,7 +72,7 @@ class Gauss
TYPE o;
public:
Gauss(TYPE o) : o(o) {}
TYPE operator () (int n, int N)
TYPE operator () (int n, int N) const
{
return exp(- TYPE(0.5) * pow((TYPE(n) - TYPE(N - 1) / TYPE(2)) / (o * TYPE(N - 1) / TYPE(2)), TYPE(2)));
}
@ -110,7 +110,7 @@ class Kaiser
}
public:
Kaiser(TYPE a) : a(a) {}
TYPE operator () (int n, int N)
TYPE operator () (int n, int N) const
{
return i0(Const<TYPE>::Pi() * a * sqrt(TYPE(1) - sqr(TYPE(2 * n) / TYPE(N - 1) - TYPE(1)))) / i0(Const<TYPE>::Pi() * a);
}