Method Set

libraries/lib-vst3/VST3Wrapper.cpp:244–379

                     Steinberg::Vst::IParameterChanges::iid);

class ComponentHandler : public Steinberg::Vst::IComponentHandler
{
   VST3Wrapper& mWrapper;
   EffectSettingsAccess* mAccess{nullptr};
   //Used to prevent calls from non-UI thread
   const std::thread::id mThreadId;
   
   EffectSettings* mStateChangeSettings {nullptr};
   std::map<Steinberg::Vst::ParamID, Steinberg::Vst::ParamValue> mParametersCache;
   std::map<Steinberg::Vst::ParamID, Steinberg::Vst::ParamValue> mCurrentParamValues;

public:
   
   ComponentHandler(VST3Wrapper& wrapper)
      : mThreadId(std::this_thread::get_id()), mWrapper(wrapper)
   {
      FUNKNOWN_CTOR;
   }
   virtual ~ComponentHandler() { FUNKNOWN_DTOR; }

   void LoadCurrentParamValues()
   {
      const auto paramsCount = mWrapper.mEditController->getParameterCount();

      for (int i = 0; i < paramsCount; ++i)
      {
         using Steinberg::Vst::ParameterInfo;
         ParameterInfo info {};
         mWrapper.mEditController->getParameterInfo(i, info);

         if ((info.flags & ParameterInfo::kIsReadOnly) != 0)
            continue;
         
         mCurrentParamValues[info.id] =
            mWrapper.mEditController->getParamNormalized(info.id);
      }
   }

   void SetAccess(EffectSettingsAccess* access) { mAccess = access; }

   EffectSettingsAccess* GetAccess() { return mAccess; }

   void BeginStateChange(EffectSettings& settings)
   {
      mStateChangeSettings = &settings;
   }

   void EndStateChange()
   {
      assert(mStateChangeSettings != nullptr);
      FlushCache(*mStateChangeSettings);
      mStateChangeSettings = nullptr;
   }

   void FlushCache(EffectSettings& settings)
   {
      if(mParametersCache.empty())
         return;