Store and restore free filter state

Source/PluginProcessor.cpp

@@ -232,7 +232,9 @@ ValueTree PaulstretchpluginAudioProcessor::getStateTree(bool ignoreoptions, bool
 		paramtree.setProperty("loadfilewithstate", m_load_file_with_state, nullptr);
 	}
 	storeToTreeProperties(paramtree, nullptr, "waveviewrange", m_wave_view_range);
-	return paramtree;
+    ValueTree freefilterstate = m_free_filter_envelope->saveState(Identifier("freefilter_envelope"));
+    paramtree.addChild(freefilterstate, -1, nullptr);
+    return paramtree;
 }
 
 void PaulstretchpluginAudioProcessor::setStateFromTree(ValueTree tree)
@@ -241,7 +243,9 @@ void PaulstretchpluginAudioProcessor::setStateFromTree(ValueTree tree)
 	{
 		{
 			ScopedLock locker(m_cs);
-			m_load_file_with_state = tree.getProperty("loadfilewithstate", true);
+            ValueTree freefilterstate = tree.getChildWithName("freefilter_envelope");
+            m_free_filter_envelope->restoreState(freefilterstate);
+            m_load_file_with_state = tree.getProperty("loadfilewithstate", true);
 			if (tree.hasProperty("numspectralstages"))
 			{
 				std::vector<SpectrumProcess> order;

Source/jcdp_envelope.h

@@ -210,9 +210,9 @@ public:
     double GetDefValue() { return m_defvalue; }
     void SetDefValue(double value) { m_defvalue=value; }
     int GetDefShape() { return m_defshape; }
-	ValueTree saveState()
+	ValueTree saveState(Identifier id)
 	{
-		ValueTree result("envelope");
+		ValueTree result(id);
 		for (int i = 0; i < m_nodes.size(); ++i)
 		{
 			ValueTree pt_tree("pt");
@@ -224,7 +224,9 @@ public:
 	}
 	void restoreState(ValueTree state)
 	{
-		int numnodes = state.getNumChildren();
+		if (state.isValid()==false)
+            return;
+        int numnodes = state.getNumChildren();
 		if (numnodes > 0)
 		{
 			m_nodes.clear();