feat(dsp): add core synthesizer oscillators, wavetable and voice engine

2026-09-08 14:55:21 +02:00
parent 6e2859a1f6
commit fc9d16b302
12 changed files with 1473 additions and 0 deletions
@@ -0,0 +1,67 @@
+#pragma once
+
+#include <JuceHeader.h>
+#include "Params.h"
+#include "Wavetable.h"
+#include "SynthVoice.h"
+#include "LFO.h"
+#include "FXProcessor.h"
+#include "ModulationMatrix.h"
+#include "MacroControls.h"
+
+namespace serum
+{
+
+// ===========================================================================
+// The synthesis engine: a fixed pool of voices, four global LFOs, a wavetable
+// library and the FX rack. Owns all per-block DSP and MIDI handling.
+// ===========================================================================
+class Engine
+{
+public:
+    void prepare (double sampleRate, int blockSize);
+    void reset();
+
+    void processBlock (juce::AudioBuffer<float>& buffer,
+                       juce::MidiBuffer& midi,
+                       juce::AudioProcessorValueTreeState& apvts,
+                       juce::AudioPlayHead* playhead);
+
+    // MIDI
+    void noteOn (int noteNumber, float velocity01);
+    void noteOff (int noteNumber);
+    void allNotesOff();
+
+    // Modulation / DSP accessors (read-only for the GUI).
+    ModulationMatrix&  getMatrix()     { return matrix; }
+    MacroControls&     getMacros()     { return macros; }
+    WavetableLibrary&  getWavetables() { return wavetables; }
+    const std::array<LFO, kNumLfos>& getLfos() const { return lfos; }
+    void setLfoShapeData (int index, const std::vector<float>& data, int steps);
+
+    int  getActiveVoiceCount() const;
+
+private:
+    std::array<SynthVoice, kNumVoices> voices;
+    std::array<LFO, kNumLfos> lfos;
+    WavetableLibrary wavetables;
+    FXProcessor fx;
+    ModulationMatrix matrix;
+    MacroControls macros;
+
+    double sr = 44100.0;
+    int    blockSize = 512;
+    double bpm = 120.0;
+    float  pitchBend = 0.0f;
+    float  modWheel  = 0.0f;
+    juce::uint64 noteCounter = 0;
+
+    juce::AudioBuffer<float> mixBuffer;
+
+    SynthVoice* findFreeVoice();
+    SynthVoice* stealVoice();
+
+    void readOscParams (juce::AudioProcessorValueTreeState& apvts, const char* prefix, OscParams& out);
+};
+
+} // namespace serum