From fdc70ac7039d633b26f659e476681d99d45c685a Mon Sep 17 00:00:00 2001
From: Stéphane Lenclud <github@lenclud.com>
Date: Sun, 3 Feb 2019 09:13:19 +0100
Subject: Kinect: Adding class to encapsulate Microsoft interface pointer.

---
 tracker-kinect-face/tracker.cpp | 26 +++++++++++++++++++-------
 tracker-kinect-face/tracker.h   | 28 +++++++++++++++++++++++++++-
 2 files changed, 46 insertions(+), 8 deletions(-)

diff --git a/tracker-kinect-face/tracker.cpp b/tracker-kinect-face/tracker.cpp
index 073cf0be..8c2c164d 100644
--- a/tracker-kinect-face/tracker.cpp
+++ b/tracker-kinect-face/tracker.cpp
@@ -232,6 +232,7 @@ void KinectFaceTracker::ExtractFaceRotationInDegrees(const Vector4* pQuaternion,
 }
 
 
+
 /// <summary>
 /// Initializes the default Kinect sensor
 /// </summary>
@@ -248,9 +249,9 @@ HRESULT KinectFaceTracker::InitializeDefaultSensor()
 
 	if (m_pKinectSensor)
 	{
-		// Initialize Kinect and get color, body and face readers
-		IColorFrameSource* pColorFrameSource = nullptr;
-		IBodyFrameSource* pBodyFrameSource = nullptr;
+		// Initialize Kinect and get color, body and face readers		
+		UniqueInterface<IBodyFrameSource> pBodyFrameSource;
+		UniqueInterface<IColorFrameSource> pColorFrameSource;
 
 		hr = m_pKinectSensor->Open();
 
@@ -261,17 +262,23 @@ HRESULT KinectFaceTracker::InitializeDefaultSensor()
 
 		if (SUCCEEDED(hr))
 		{
-			hr = m_pKinectSensor->get_ColorFrameSource(&pColorFrameSource);
+			hr = m_pKinectSensor->get_ColorFrameSource(pColorFrameSource.PtrPtr());
+			pColorFrameSource.Reset();
 		}
+		
+		//std::unique_ptr<IColorFrameSource, decltype(&SafeRelease)> colorFrameSource(pColorFrameSource, SafeRelease);
 
 		if (SUCCEEDED(hr))
 		{
+			//hr = (*pColorFrameSource.PtrPtr())->OpenReader(&m_pColorFrameReader);
 			hr = pColorFrameSource->OpenReader(&m_pColorFrameReader);
 		}
 
+
 		if (SUCCEEDED(hr))
 		{
-			hr = m_pKinectSensor->get_BodyFrameSource(&pBodyFrameSource);
+			hr = m_pKinectSensor->get_BodyFrameSource(pBodyFrameSource.PtrPtr());
+			pBodyFrameSource.Reset();
 		}
 
 		if (SUCCEEDED(hr))
@@ -297,8 +304,13 @@ HRESULT KinectFaceTracker::InitializeDefaultSensor()
 			}
 		}
 
-		SafeRelease(pColorFrameSource);
-		SafeRelease(pBodyFrameSource);
+		//pColorFrameSource.Free();
+		//pBodyFrameSource.Free();
+		//SafeRelease(pColorFrameSource);
+		//SafeRelease(pBodyFrameSource);
+		
+		//SafeRelease(*pBodyFrameSource.PtrPtr());
+		//SafeRelease(*pColorFrameSource.PtrPtr());
 	}
 
 	if (!m_pKinectSensor || FAILED(hr))
diff --git a/tracker-kinect-face/tracker.h b/tracker-kinect-face/tracker.h
index 5068f185..220a126f 100644
--- a/tracker-kinect-face/tracker.h
+++ b/tracker-kinect-face/tracker.h
@@ -14,7 +14,7 @@
 
 #pragma once
 
-// Safe release for interfaces
+// @deprecated Use UniqueInterface instead. Remove it at some point.
 template<class Interface>
 inline void SafeRelease(Interface *& pInterfaceToRelease)
 {
@@ -25,6 +25,32 @@ inline void SafeRelease(Interface *& pInterfaceToRelease)
 	}
 }
 
+template<class Interface>
+inline void ReleaseInterface(Interface* pInterfaceToRelease)
+{
+	if (pInterfaceToRelease != nullptr)
+	{
+		pInterfaceToRelease->Release();
+	}
+}
+
+// Safely use Microsoft interfaces.
+template<typename T>
+class UniqueInterface : public std::unique_ptr<T, decltype(&ReleaseInterface<T>)> ///**/
+{
+public:
+	UniqueInterface() : std::unique_ptr<T, decltype(&ReleaseInterface<T>)>(nullptr, ReleaseInterface<T>){}
+	// Access pointer, typically for creation
+	T** PtrPtr() { return &iPtr; };
+	// Called this once the pointer was created
+	void Reset() { std::unique_ptr<T, decltype(&ReleaseInterface<T>)>::reset(iPtr); }
+	// If ever you want to release that interface before the object is deleted
+	void Free() { iPtr = nullptr; Reset(); }	
+private:
+	T* iPtr = nullptr;
+};
+
+
 
 class KinectFaceTracker : public ITracker
 {
-- 
cgit v1.2.3