Grid synth engine

synth_engine.h

@@ -2,6 +2,7 @@
 #define SYNTH_ENGINE_H
 
 #include <stdint.h>
+#include <mutex>
 
 /**
  * @class SynthEngine
@@ -27,6 +28,7 @@ public:
      * @brief Constructs the synthesizer engine.
      * @param sampleRate The audio sample rate in Hz (e.g., 44100).
      */
+    ~SynthEngine();
     SynthEngine(uint32_t sampleRate);
 
     /**
@@ -82,6 +84,27 @@ public:
      */
     void setFilter(float lpCutoff, float hpCutoff);
 
+    // --- Grid Synth ---
+    struct GridCell {
+        enum Type { EMPTY, FIXED_OSCILLATOR, INPUT_OSCILLATOR, NOISE, FORK, WIRE, OPERATOR, DELAY, SINK };
+        enum Op { OP_ADD, OP_MUL, OP_SUB, OP_DIV, OP_MIN, OP_MAX };
+        
+        Type type = EMPTY;
+        float param = 0.5f; // 0.0 to 1.0
+        int rotation = 0;   // 0:N, 1:E, 2:S, 3:W (Output direction)
+        float value = 0.0f; // Current output sample
+        float phase = 0.0f; // For Oscillator, Noise state
+        float* buffer = nullptr; // For Delay
+        uint32_t buffer_size = 0; // For Delay
+        uint32_t write_idx = 0; // For Delay
+    };
+
+    GridCell grid[5][8];
+    std::mutex gridMutex;
+
+    // Helper to process one sample step of the grid
+    float processGridStep();
+
 private:
     uint32_t _sampleRate;
     uint32_t _phase;      // Phase accumulator for the oscillator.