polyphony checkpoint

src/synth/Instrument.cpp

@@ -0,0 +1,36 @@
+
+#include "Instrument.hpp"
+
+#include "string"
+
+Instrument::Instrument(ConfigService* config, LoggerService* logger) :
+    config_(config), logger_(logger) {
+
+}
+
+void Instrument::noteOn(float frequency, float velocity) {
+
+    // std::string msg = "NoteOn Frequency = " + std::to_string(frequency);
+    // if(logger_ != nullptr) logger_->log("Instrument", LogFlag::Debug, msg);
+
+    phaseIncrement_ = 2.0f * pi * frequency / sampleRate_;
+
+    active_ = true;
+}
+
+void Instrument::noteOff() {
+    active_ = false;
+}
+
+bool Instrument::isActive() {
+    return active_;
+}
+
+float Instrument::process(bool& scopeTrigger) {
+
+    phase_ += phaseIncrement_;
+    if(phase_ > 2.0f * pi) phase_ -= 2.0f * pi;
+
+    return sin(phase_);
+
+}