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23 lines
924 B
C++
23 lines
924 B
C++
#pragma once
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#include "../types.h"
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#include "windowed_sinc.h"
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#include "estimate_tap_count.h"
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#include "../window/nuttall.h"
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#include "../math/phasor.h"
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#include "../math/freq_to_omega.h"
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namespace dsp::taps {
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template<class T>
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inline tap<T> bandPass(double bandStart, double bandStop, double transWidth, double sampleRate) {
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assert(bandStop > bandStart);
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float offsetOmega = math::freqToOmega((bandStart + bandStop) / 2.0, sampleRate);
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return windowedSinc<T>(estimateTapCount(transWidth, sampleRate), (bandStop - bandStart) / 2.0, sampleRate, [=](double n, double N) {
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if constexpr (std::is_same_v<T, float>) {
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return cosf(offsetOmega * (float)n) * window::nuttall(n, N);
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}
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if constexpr (std::is_same_v<T, complex_t>) {
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return math::phasor(offsetOmega * (float)n) * window::nuttall(n, N);
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}
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});
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}
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} |