Added onSampleRateChange() to Module

Makefile

@@ -74,6 +74,7 @@ include compile.mk
 
 
 dist: all
+	rm -rf dist
 	$(MAKE) -C plugins/Fundamental dist
 
 ifeq ($(ARCH), mac)

include/engine.hpp

@@ -49,6 +49,7 @@ struct Module {
 
 	/** Advances the module by 1 audio frame with duration 1.0 / gSampleRate */
 	virtual void step() {}
+	virtual void onSampleRateChange() {}
 
 	/** Override these to store extra internal data in the "data" property */
 	virtual json_t *toJson() { return NULL; }
@@ -80,6 +81,7 @@ void engineAddWire(Wire *wire);
 void engineRemoveWire(Wire *wire);
 void engineSetParam(Module *module, int paramId, float value);
 void engineSetParamSmooth(Module *module, int paramId, float value);
+void engineSetSampleRate(float sampleRate);
 
 extern float gSampleRate;
 extern bool gPaused;

src/app/Toolbar.cpp

@@ -70,7 +70,7 @@ struct PauseItem : MenuItem {
 struct SampleRateItem : MenuItem {
 	float sampleRate;
 	void onAction() {
-		gSampleRate = sampleRate;
+		engineSetSampleRate(sampleRate);
 		gPaused = false;
 	}
 };

src/engine.cpp

@@ -39,7 +39,7 @@ void Wire::step() {
 }
 
 void engineInit() {
-	gSampleRate = 44100.0;
+	engineSetSampleRate(44100.0);
 }
 
 void engineDestroy() {
@@ -218,5 +218,15 @@ void engineSetParamSmooth(Module *module, int paramId, float value) {
 	smoothValue = value;
 }
 
+void engineSetSampleRate(float newSampleRate) {
+	VIPLock vipLock(vipMutex);
+	std::lock_guard<std::mutex> lock(mutex);
+	gSampleRate = newSampleRate;
+	// onSampleRateChange
+	for (Module *module : modules) {
+		module->onSampleRateChange();
+	}
+}
+
 
 } // namespace rack

src/settings.cpp

@@ -62,8 +62,10 @@ static void settingsFromJson(json_t *rootJ) {
 
 	// sampleRate
 	json_t *sampleRateJ = json_object_get(rootJ, "sampleRate");
-	if (sampleRateJ)
-		gSampleRate = json_number_value(sampleRateJ);
+	if (sampleRateJ) {
+		float sampleRate = json_number_value(sampleRateJ);
+		engineSetSampleRate(sampleRate);
+	}
 }