polyphony checkpoint

src/synth/Voice.h

@@ -1,4 +1,72 @@
 
-# pragma once
+#pragma once
 
-// placeholder
+#include "Oscillator.h"
+#include "Envelope.h"
+#include "Filter.h"
+#include "ParameterStore.h"
+
+#ifndef M_PI // I hate my stupid chungus life
+    #define M_PI 3.14159265358979323846
+#endif
+
+// TODO: you get it, also in a yml config
+#define SYNTH_PITCH_STANDARD 440.0f // frequency of home pitch
+#define SYNTH_MIDI_HOME 69 // midi note index of home pitch
+#define SYNTH_NOTES_PER_OCTAVE 12
+
+struct SmoothedParam {
+    float current = 0.0f;
+    float target = 0.0f;
+    float gain = 0.001f;
+
+    inline void update() { current += gain * (target - current); }
+};
+
+class Voice {
+public:
+
+    Voice(std::array<SmoothedParam, PARAM_COUNT>* params);
+    ~Voice() = default;
+
+    void setSampleRate(float sampleRate);
+
+    void noteOn(int midiNote, float velocity);
+    void noteOff();
+
+    bool isActive();
+
+    float process(float* params, bool& scopeTrigger);
+
+    uint8_t note() { return note_; }
+
+private:
+
+    float sampleRate_ = 44100.0f;
+
+    inline float noteToFrequency(uint8_t note);
+
+    uint8_t note_ = 0;
+    float velocity_ = 1.0f;
+    bool active_ = false;
+
+    // here's where the actual sound generation happens
+    // TODO: put this in an oscillator class
+    float frequency_ = 220.0f;
+    float phase_ = 0.0f;
+    //Oscillator osc_; // example
+
+    // envelopes !!
+    // TODO: foreach envelope in vector<Envelope> envelopes_
+    Envelope gainEnvelope_;
+    Envelope cutoffEnvelope_;
+    Envelope resonanceEnvelope_;
+
+    // filters
+    Filter filter1_;
+    Filter filter2_;
+
+    // paramstore pointer
+    std::array<SmoothedParam, PARAM_COUNT>* params_;
+
+};