`node.release()`

notes

@@ -39,7 +39,7 @@ TODO {
         - add standardized step values for knobs and set a default (int enum)
         global pan (PXX) for InstrumentCore?
         
-        node function to release unneeded old data when stopping playback
+        - node function to release unneeded old data when stopping playback
         ...
     }
     

xybrid/audio/audioengine.cpp

@@ -141,6 +141,7 @@ void AudioEngine::play(std::shared_ptr<Project> p) {
 
 void AudioEngine::stop() {
     QMetaObject::invokeMethod(this, [this] {
+        if (project) project->rootGraph->release();
         project = nullptr;
         queueValid = false;
         queue.clear();

xybrid/data/graph.cpp

@@ -37,6 +37,7 @@ Graph::Graph() {
 
 // propagate
 void Graph::reset() { for (auto c : children) c->reset(); }
+void Graph::release() { for (auto c : children) c->release(); }
 
 void Graph::saveData(QCborMap& m) const {
     // graph properties

xybrid/data/graph.h

@@ -14,6 +14,7 @@ namespace Xybrid::Data {
         int viewX{}, viewY{};
 
         void reset() override;
+        void release() override;
         void saveData(QCborMap&) const override;
         void loadData(const QCborMap&) override;
 

xybrid/data/node.h

@@ -119,7 +119,8 @@ namespace Xybrid::Data {
         bool dependsOn(std::shared_ptr<Node>);
 
         virtual void init() { }
-        virtual void reset() { }
+        virtual void reset() { } // called on starting playback to prepare for operation
+        virtual void release() { } // called on stop to release any resources that may be hanging
         virtual void process() { }
         virtual void saveData(QCborMap&) const { }
         virtual void loadData(const QCborMap&) { }