Method LoadPreset

libraries/lib-vst3/VST3Wrapper.cpp:652–698

}

void VST3Wrapper::LoadPreset(const wxString& presetId)
{
   using namespace Steinberg;

   auto cache = GetCache(mEffectClassInfo.ID());

   if(cache->rootUnitProgramChangeParameterID != Vst::kNoParamId &&
      cache->rootUnitProgramCount > 0)
   {
      Vst::UnitID unitId;
      int32 programIndex; 
      if(VST3Utils::ParseFactoryPresetID(presetId, unitId, programIndex) &&
         programIndex >= 0 && programIndex < cache->rootUnitProgramCount)
      {
         auto paramValueNormalized = static_cast<Vst::ParamValue>(programIndex);
         if(cache->rootUnitProgramCount > 1)
            paramValueNormalized /= static_cast<Vst::ParamValue>(cache->rootUnitProgramCount - 1);

         mEditController->setParamNormalized(
            cache->rootUnitProgramChangeParameterID,
            paramValueNormalized);

         if(mComponentHandler)
         {
            mComponentHandler->beginEdit(cache->rootUnitProgramChangeParameterID);
            auto commit = finally([&] { mComponentHandler->endEdit(cache->rootUnitProgramChangeParameterID); });
            mComponentHandler->performEdit(
               cache->rootUnitProgramChangeParameterID,
               paramValueNormalized);
         }

         return;
      }
   }

   auto fileStream = owned(Vst::FileStream::open(presetId.c_str(), "rb"));
   if(!fileStream)
      throw FileException(FileException::Cause::Open, presetId);

   if(!LoadPresetFromStream(fileStream))
   {
      throw SimpleMessageBoxException(
         ExceptionType::BadEnvironment,
         XO("Unable to apply VST3 preset file %s").Format(presetId),
         XO("Error"));
   }
}

void VST3Wrapper::SavePresetToFile(const wxString& filepath) const
{