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https://github.com/yokemura/Magical8bitPlug2.git
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137 lines
3.9 KiB
C++
137 lines
3.9 KiB
C++
/*
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==============================================================================
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TonalVoice.cpp
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Created: 11 Nov 2019 9:36:34pm
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Author: 除村 武志
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==============================================================================
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*/
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#include "TonalVoice.h"
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//---------------------------------------------
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//
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// Tonal Voice
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// The base for pulse/triangle (Abstract)
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//
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//---------------------------------------------
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TonalVoice::TonalVoice (SettingRefs* sRefs) : BaseVoice (sRefs) {}
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void TonalVoice::startNote (int midiNoteNumber, float velocity, SynthesiserSound*, int currentPitchBendPosition)
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{
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BaseVoice::startNote (midiNoteNumber, velocity, 0, currentPitchBendPosition);
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currentBendAmount = * (settingRefs->bendRange) * ((double) (currentPitchBendPosition - 8192)) / 8192.0;
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currentPitchSequenceFrame = 0;
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vibratoCount = 0;
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float iniPitch = * (settingRefs->sweepInitialPitch);
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float time = * (settingRefs->sweepTime);
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currentAutoBendAmount = iniPitch;
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autoBendDelta = -1.0 * iniPitch / (time * getSampleRate());
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}
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void TonalVoice::advanceControlFrame()
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{
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BaseVoice::advanceControlFrame();
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currentPitchSequenceFrame = settingRefs->pitchSequence.nextIndexOf (currentPitchSequenceFrame);
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}
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void TonalVoice::calculateAngleDelta()
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{
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int noteNumberMod = 0;
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double finePitchInSeq = 0;
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if (settingRefs->isPitchSequenceEnabled())
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{
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switch (settingRefs->pitchSequenceMode())
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{
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case kPitchSequenceModeFine:
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finePitchInSeq = (double)settingRefs->pitchSequence.valueAt (currentPitchSequenceFrame) / 8.0;
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break;
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case kPitchSequenceModeCoarse:
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noteNumberMod = settingRefs->pitchSequence.valueAt (currentPitchSequenceFrame);
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break;
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default:
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break;
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}
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}
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double byWheel = settingRefs->vibratoIgnoresWheel() ? 1.0 : currentModWheelValue;
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double vibratoAmount = * (settingRefs->vibratoDepth) * sin (getVibratoPhase()) * byWheel;
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double noteNoInDouble = noteNumber
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+ noteNumberMod
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+ currentBendAmount
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+ currentAutoBendAmount
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+ vibratoAmount
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+ finePitchInSeq;
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auto cyclesPerSecond = noteNoToHeltzDouble (noteNoInDouble);
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auto cyclesPerSample = cyclesPerSecond / getSampleRate();
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angleDelta = cyclesPerSample * 2.0 * MathConstants<double>::pi;
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}
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void TonalVoice::pitchWheelMoved (int amount)
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{
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currentBendAmount = * (settingRefs->bendRange) * ((double) (amount - 8192)) / 8192.0;
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}
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void TonalVoice::controllerMoved (int type, int amount)
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{
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if (type == 1) // Modulation
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{
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currentModWheelValue = (double)amount / 127.0;
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}
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}
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double TonalVoice::noteNoToHeltzDouble (double noteNoInDouble, const double frequencyOfA)
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{
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return frequencyOfA * std::pow (2.0, (noteNoInDouble - 69) / 12.0);
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}
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double TonalVoice::getVibratoPhase()
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{
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double sec = (double)vibratoCount / getSampleRate();
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float delay = * (settingRefs->vibratoDelay);
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float rate = * (settingRefs->vibratoRate);
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if ( sec < delay ) { return 0.0; }
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double phase = fmodf (( sec - delay ), rate) / rate * MathConstants<double>::twoPi;
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return phase;
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}
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void TonalVoice::onFrameAdvanced()
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{
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vibratoCount++;
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currentAutoBendAmount = currentAutoBendAmount + autoBendDelta;
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if (autoBendDelta > 0)
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{
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// positive slope
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if (currentAutoBendAmount > 0)
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{
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currentAutoBendAmount = 0;
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autoBendDelta = 0;
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}
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}
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else
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{
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// negative slope
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if (currentAutoBendAmount < 0)
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{
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currentAutoBendAmount = 0;
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autoBendDelta = 0;
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}
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}
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};
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