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41 lines
764 B
C++
41 lines
764 B
C++
/*
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Coefficient array helper
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Copyright 2018 Ahmet Inan <inan@aicodix.de>
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*/
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#pragma once
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namespace DSP {
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template <int TAPS, typename TYPE>
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class Coeffs
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{
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TYPE w[TAPS];
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public:
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template <typename FUNC>
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Coeffs(FUNC *func)
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{
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for (int n = 0; n < TAPS; ++n)
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w[n] = (*func)(n, TAPS);
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}
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template <typename FUNC0, typename FUNC1>
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Coeffs(FUNC0 *func0, FUNC1 *func1)
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{
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for (int n = 0; n < TAPS; ++n)
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w[n] = (*func0)(n, TAPS) * (*func1)(n, TAPS);
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}
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void normalize(TYPE divisor = 1)
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{
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TYPE sum(0);
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for (int n = 0; n < TAPS; ++n)
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sum += w[n];
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for (int n = 0; n < TAPS; ++n)
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w[n] /= divisor * abs(sum);
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}
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inline TYPE operator () (int n) { return n >= 0 && n < TAPS ? w[n] : 0; }
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inline operator const TYPE * () const { return w; }
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};
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}
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