50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
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#ifndef __RATIO_SEQ_HPP__
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#define __RATIO_SEQ_HPP__
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#include <array>
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#include <cstddef>
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struct ratioSeqState {
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std::array<float, 3> ratios{1.f};
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float phasor=0.f;
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float phasorInc=0.f;
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float phaseOffset = 0.f;
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bool lastTrig = false;
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float phasorMul = 1.f;
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float ratioSum=1.f;
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int midiNote = 36;
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float pulseWidth = 0.5f;
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std::array<float, 2> ampRatios{1.f};
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float ampRatioSum=1.f;
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};
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template<size_t seqLength>
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inline bool __not_in_flash_func(ratioSeq)(float phasor, float phaseOffset, float ratioSum, const std::array<float, seqLength> &ratios, float pulseWidth) {
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bool trig = 0;
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float offsetPhase = phaseOffset + phasor;
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if (offsetPhase >= 1.f) {
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offsetPhase -= 1.f;
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}
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float phaseAdj = ratioSum * offsetPhase;
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float accumulatedSum = 0;
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float lastAccumulatedSum = 0;
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for (size_t v : ratios)
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{
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accumulatedSum += v;
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if (phaseAdj <= accumulatedSum)
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{
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// check pulse width
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float beatPhase = (phaseAdj - lastAccumulatedSum) /
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(accumulatedSum - lastAccumulatedSum);
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trig = beatPhase <= pulseWidth;
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break;
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}
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lastAccumulatedSum = accumulatedSum;
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}
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return trig;
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}
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#endif // __RATIO_SEQ_HPP__
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