[host] initial NvFBC implementation

host/Capture/NvFBC.h

@@ -0,0 +1,36 @@
+#pragma once
+#include "ICapture.h"
+
+#define W32_LEAN_AND_MEAN
+#include <Windows.h>
+
+#include <NvFBC\nvFBC.h>
+#include <NvFBC\nvFBCToSys.h>
+
+namespace Capture
+{
+  class NvFBC : public ICapture
+  {
+  public:
+    NvFBC();
+    ~NvFBC();
+
+    bool Initialize();
+    void DeInitialize();
+    enum FrameType GetFrameType();
+    enum FrameComp GetFrameCompression();
+    size_t GetMaxFrameSize();
+    bool GrabFrame(void * buffer, size_t bufferSize, size_t * outLen);
+
+  private:
+    bool m_initialized;
+    HMODULE m_hDLL;
+
+    NvFBC_CreateFunctionExType    m_fnCreateEx;
+    NvFBC_SetGlobalFlagsType      m_fnSetGlobalFlags;
+    NvFBC_GetStatusExFunctionType m_fnGetStatusEx;
+    NvFBC_EnableFunctionType      m_fnEnable;
+
+    DWORD m_maxCaptureWidth, m_maxCaptureHeight;
+  };
+};