46 lines
860 B
C++
46 lines
860 B
C++
#pragma once
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template <class T>
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struct Biquad
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{
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T b0;
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T b1;
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T b2;
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T a1;
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T a2;
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T xn1;
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T xn2;
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T yn1;
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T yn2;
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Biquad() = default;
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Biquad(T a1, T a2, T b0, T b1, T b2) : b0(b0), b1(b1), b2(b2), a1(a1), a2(a2){};
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Biquad(T a0, T a1, T a2, T b0, T b1, T b2)
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{
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this->a1 = a1 / a0;
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this->a2 = a2 / a0;
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this->b0 = b0 / a0;
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this->b1 = b1 / a0;
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this->b2 = b2 / a0;
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}
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T update(T x)
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{
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T y = this->b0 * x + this->b1 * this->xn1 + this->b2 * this->xn2 - this->yn1 * this->a1 - this->yn2 * this->a2;
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this->xn2 = this->xn1;
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this->xn1 = x;
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this->yn2 = this->yn1;
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this->yn1 = y;
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return y;
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}
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void reset() {
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this->xn1 = 0.0;
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this->xn2 = 0.0;
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this->yn1 = 0.0;
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this->yn1 = 0.0;
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}
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}; |