973455b158
Header-only, heap-free, sample-rate-aware DSP primitives for stream 3: - Biquad (LPF/HPF/BPF/Notch/Peak/LowShelf/HighShelf, denormal flush) - Delay<N> + DynamicDelay<N> (fixed-length feedback + power-of-two ring with fractional read & smoothed offset) - AllPass / Comb / LpComb (Schroeder-Moorer reverb sections, split per role rather than maximilian's one-class-many-roles maxiReverbFilters) - DCBlocker (one-pole HPF) - ChamberlinSVF + OnePoleSmoother<NCh> + EnvelopeFollower - ADSR envelope generator - SineOsc/SawOsc/SquareOsc, PAFOperator (port of maxiPAFOperator with static gauss/cauchy tables), FMOp single-operator FM building block - PitchShifter<N> granular two-head crossfade (replaces daisysp PitchShifter) Tests: biquad freq-domain attenuation, delay tap timing, reverb boundedness, pitch-shifter ratio + finite output. All pass under -Wall -Wextra -Werror -Wpedantic, C++20.
37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
// tests/cpp/test_dsp_reverb.cpp — bounded-output sanity for reverb sections.
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#include <cmath>
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#include "test_helpers.hpp"
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#include "../../nisps/dsp/reverb.hpp"
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NISPS_TEST(allpass_finite_and_bounded) {
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nisps::AllPass<256> ap;
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for (int n = 0; n < 10000; ++n) {
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const float x = std::sin(static_cast<float>(n) * 0.05f) * 0.5f;
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const float y = ap.process(x, 137u, 0.7f);
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NISPS_EXPECT(std::isfinite(y));
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NISPS_EXPECT(std::fabs(y) < 50.f); // generous bound
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}
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}
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NISPS_TEST(comb_decays_after_impulse) {
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nisps::Comb<256> c;
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c.process(1.f, 100u, 0.5f); // impulse
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float max_after = 0.f;
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for (int n = 1; n < 1000; ++n) {
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const float y = c.process(0.f, 100u, 0.5f);
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if (std::fabs(y) > max_after) max_after = std::fabs(y);
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NISPS_EXPECT(std::isfinite(y));
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}
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NISPS_EXPECT(max_after < 5.f);
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}
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NISPS_TEST(lpcomb_finite_with_lp) {
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nisps::LpComb<512> lp;
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for (int n = 0; n < 5000; ++n) {
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const float x = (n % 20 == 0) ? 1.f : 0.f;
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const float y = lp.process(x, 200u, 0.7f, 0.3f);
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NISPS_EXPECT(std::isfinite(y));
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}
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}
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