// video.h

VIDEOPORT_DEPRECATED VIDEOPORT_API PVOID VideoPortGetMdl(
  [in] IN PVOID HwDeviceExtension,
  [in] IN PDMA  pDma
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-video-videoportgetmdl)

VideoPortGetMdl function

Description

The VideoPortGetMdl function is obsolete in Windows 2000 and later.

VideoPortGetMdl retrieves the memory descriptor list (MDL) that represents the page table of the locked buffer.

Parameters

`HwDeviceExtension` [in]

Pointer to the miniport driver's device extension.

`pDma` [in]

Is a handle to the DMA context being queried. This handle was obtained from VideoPortLockPages or VideoPortDoDma.

Return value

VideoPortGetMdl returns pDma, for compatibility reasons.

Remarks

See Bus-Master DMA in Video Miniport Drivers for information about packet-based and common-buffer DMA transfers.

View the official Windows Driver Kit DDI reference