1 files changed, 67 insertions, 0 deletions
diff --git a/AVStream/avscamera/sys/ExtendedFieldOfView.h b/AVStream/avscamera/sys/ExtendedFieldOfView.h
new file mode 100644
index 00000000..388356a6
--- /dev/null
+++ b/AVStream/avscamera/sys/ExtendedFieldOfView.h
@@ -0,0 +1,67 @@
+/**************************************************************************
+
+    A/V Stream Camera Sample
+
+    Copyright (c) 2014, Microsoft Corporation.
+
+    File:
+
+        ExtendedFieldOfView.h
+
+    Abstract:
+
+        This file contains the helper class CExtendedFieldOfView.
+        The class is provides initialization and accessor functions for
+        KSCAMERA_EXTENDEDPROP_FIELDOFVIEW. 
+
+    History:
+
+        created 11/26/2014
+
+**************************************************************************/
+
+//
+//  Helper class for Extended Field of View.
+//
+class CExtendedFieldOfView
+    : public CExtendedHeader
+{
+public:
+    KSCAMERA_EXTENDEDPROP_FIELDOFVIEW   m_Params;
+
+public:
+    //  Standardized ctors to help ensure a consistant definition.
+    CExtendedFieldOfView( ULONGLONG flags=0, ULONG result=STATUS_SUCCESS )
+        : CExtendedHeader( flags, result )
+    {
+        Size = sizeof(*this);
+        RtlZeroMemory( &m_Params, sizeof(m_Params) );
+    }
+
+    CExtendedFieldOfView( KSCAMERA_EXTENDEDPROP_HEADER &hdr )
+        : CExtendedHeader(hdr)
+    {
+        Size = sizeof(*this);
+        RtlZeroMemory( &m_Params, sizeof(m_Params) );
+    }
+
+    //  Access functions let you more easily fetch the embedded field.
+    ULONG &
+    NormalizedFocalLengthX()
+    {
+        return m_Params.NormalizedFocalLengthX;
+    }
+
+    ULONG &
+    NormalizedFocalLengthY()
+    {
+        return m_Params.NormalizedFocalLengthY;
+    }
+
+    bool isValid()
+    {
+        return CExtendedHeader::isValid() &&
+               (Size    >= sizeof(*this)) ;
+    }
+};
+