2 typedef struct _VIDEOPORT_EXTENSTION_DATA
4 PDEVICE_OBJECT DeviceObject;
5 PKINTERRUPT InterruptObject;
6 KSPIN_LOCK InterruptSpinLock;
10 } VIDEOPORT_EXTENSION_DATA, *PVIDEOPORT_EXTENSION_DATA;
12 #define MPExtensionToVPExtension(MPX) \
13 ((PVIDEOPORT_EXTENSION_DATA) ((DWORD) (MPX) - sizeof(VIDEOPORT_EXTENSION_DATA)))
14 #define VPExtensionToMPExtension(VPX) \
15 ((PVOID) ((DWORD) (VPX) + sizeof(VIDEOPORT_EXTENSION_DATA)))