[TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [ISoundfieldDecoderStream](API\Runtime\AudioExtensions\ISoundfieldDecoderStream) > CreateDecoderStream ( const [FAudioPluginInitializationParams](API\Runtime\AudioExtensions\FAudioPluginInitializationParams) & InitInfo, const [ISoundfieldEncodingSettingsProxy](API\Runtime\AudioExtensions\ISoundfieldEncodingSettingsProxy) & InitialSettings )