Fix crash on ending ar session with async ar recorder

openVulkanoCpp/AR/ArRecorder.cpp

@@ -53,6 +53,7 @@ namespace OpenVulkano::AR
 	ArRecorder::~ArRecorder()
 	{
 		if (!m_settings.asyncRecording) WriteMetadataFile();
+		else m_asyncProcessor.Close();
 	}
 
 	void ArRecorder::WriteColorImage(ArFrame* arFrame, MultiPartArchiveWriter* colorWriter, const std::filesystem::path* path, bool highRes) const
@@ -191,7 +192,7 @@ namespace OpenVulkano::AR
 	{
 		for(MultiPartArchiveWriter* writer : { m_colorWriter.get(), m_depthWriter.get(), m_confidenceWriter.get(), m_metadataWriter.get(), m_highResWriter.get() })
 		{
-			writer->Split();
+			if (writer) writer->Split();
 		}
 	}
 
@@ -282,6 +283,12 @@ namespace OpenVulkano::AR
 
 	ArRecorder::AsyncProcessor::~AsyncProcessor()
 	{
+		Close();
+	}
+	
+	void ArRecorder::AsyncProcessor::Close()
+	{
+		if (requestExit) return;
 		requestExit = true;
 		newDataAvailable.notify_one();
 		if (std::this_thread::get_id() != processingThread.get_id())

openVulkanoCpp/AR/ArRecorder.hpp

@@ -69,6 +69,7 @@ namespace OpenVulkano::AR
 
 			explicit AsyncProcessor(ArRecorder* recorder);
 			~AsyncProcessor();
+			void Close();
 			void Queue(const std::shared_ptr<ArFrame>& frame, bool highRes);
 			void Handler();
 		};