add parameter store

src/ParameterStore.h

@@ -0,0 +1,80 @@
+
+#pragma once
+
+#include <cstdint>
+#include <array>
+#include <atomic>
+
+enum class ParamId : uint16_t {
+    Osc1Frequency,
+    Osc1Gain,
+    Osc1VolumeEnvA,
+    Osc1VolumeEnvD,
+    Osc1VolumeEnvS,
+    Osc1VolumeEnvR,
+    FilterCutoffEnvA,
+    FilterCutoffEnvD,
+    FilterCutoffEnvS,
+    FilterCutoffEnvR,
+    FilterResonanceEnvA,
+    FilterResonanceEnvD,
+    FilterResonanceEnvS,
+    FilterResonanceEnvR,
+    // ... and so on
+    // this list could be like 200 long if I really wanted to
+    Count // for sizing
+};
+
+struct ParamDef {
+    float def;
+    float min;
+    float max;
+};
+
+// TODO: make these configurable via yml file too
+// TODO: and then when I have full on profile saving there will be a default profile to load from
+constexpr std::array<ParamDef, static_cast<size_t>(ParamId::Count)> PARAM_DEFS {{
+    { 100.0f, 20.0f, 600.0f},   // Osc1Freq
+    { 0.8f, 0.0f, 1.0f},        // Osc1Gain
+    { 10.0f, 0.0f, 1000.0f},    // Osc1VolumeEnvA,
+    { 10.0f, 0.0f, 1000.0f},    // Osc1VolumeEnvD,
+    { 10.0f, 0.0f, 1000.0f},    // Osc1VolumeEnvS,
+    { 10.0f, 0.0f, 1000.0f},    // Osc1VolumeEnvR,
+    { 10.0f, 0.0f, 1000.0f},    // FilterCutoffEnvA,
+    { 10.0f, 0.0f, 1000.0f},    // FilterCutoffEnvD,
+    { 10.0f, 0.0f, 1000.0f},    // FilterCutoffEnvS,
+    { 10.0f, 0.0f, 1000.0f},    // FilterCutoffEnvR,
+    { 10.0f, 0.0f, 1000.0f},    // FilterResonanceEnvA,
+    { 10.0f, 0.0f, 1000.0f},    // FilterResonanceEnvD,
+    { 10.0f, 0.0f, 1000.0f},    // FilterResonanceEnvS,
+    { 10.0f, 0.0f, 1000.0f},    // FilterResonanceEnvR,
+}};
+
+constexpr size_t PARAM_COUNT = static_cast<size_t>(ParamId::Count);
+
+class ParameterStore {
+
+public:
+
+    ParameterStore() { resetToDefaults(); }
+    ~ParameterStore() = default;
+
+    // TODO: move into implementation file ? idk
+    void set(ParamId id, float value) {
+        values_[static_cast<size_t>(id)].store(value, std::memory_order_relaxed);
+    }
+    float get(ParamId id) const {
+        return values_[static_cast<size_t>(id)].load(std::memory_order_relaxed);
+    }
+
+    void resetToDefaults() {
+        for(size_t i = 0; i < PARAM_COUNT; i++) {
+            values_[i].store(PARAM_DEFS[i].def, std::memory_order_relaxed);
+        }
+    }
+
+private:
+
+    std::array<std::atomic<float>, PARAM_COUNT> values_;
+
+};