Fix issue with playback

openVulkanoCpp/AR/Provider/Playback/ArSessionPlayback.cpp

@@ -29,6 +29,7 @@ namespace openVulkanoCpp::AR::Playback
 	void ArSessionPlayback::Start()
 	{
 		running = true;
+		m_frameConsumed = true;
 	}
 
 	void ArSessionPlayback::Stop()
@@ -43,9 +44,10 @@ namespace openVulkanoCpp::AR::Playback
 
 	std::shared_ptr<ArFrame> ArSessionPlayback::GetFrame()
 	{
-		while(IsRunning() && !m_nextFrame) { std::this_thread::yield(); }
+		while(IsRunning() && m_frameConsumed) { std::this_thread::yield(); }
 		auto frame = m_nextFrame;
 		m_nextFrame = nullptr;
+		m_frameConsumed = true;
 		return frame;
 	}
 
@@ -58,11 +60,13 @@ namespace openVulkanoCpp::AR::Playback
 	{
 		while (playbackReader.HasNext() && IsRunning())
 		{
-			while (m_nextFrame) { std::this_thread::yield(); }
+			while (!m_frameConsumed) { std::this_thread::yield(); }
 			try
 			{
 				std::shared_ptr<ArFrame> frame = std::make_shared<ArFramePlayback>(shared_from_this(), playbackReader);
 				lastTimestamp = frame->GetTimestamp();
+				m_nextFrame = frame;
+				m_frameConsumed = false;
 				//TODO try to keep original frame timing
 				// Trigger events
 				OnNewFrameAvailable();
@@ -73,7 +77,6 @@ namespace openVulkanoCpp::AR::Playback
 					auto view = frame->GetCameraViewForCurrentDeviceOrientation();
 					OnNewCameraViewMatrix(view);
 				}
-				m_nextFrame = frame;
 			}
 			catch (const std::exception& e)
 			{

openVulkanoCpp/AR/Provider/Playback/ArSessionPlayback.hpp

@@ -40,6 +40,7 @@ class ArSessionPlayback final : public ArSession, public std::enable_shared_from
 		const bool autoAdvance;
 		ArPlaybackReader playbackReader;
 
+		std::atomic_bool m_frameConsumed = true;
 		std::shared_ptr<ArFrame> m_nextFrame;
 		std::thread m_playbackReaderThread;
 	};