PCAM_NEW_FRAME_ROUTINE_EX - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// usbcamdi.h

PCAM_NEW_FRAME_ROUTINE_EX PcamNewFrameRoutineEx;

VOID PcamNewFrameRoutineEx(
  PVOID DeviceContext,
  PVOID FrameContext,
  ULONG StreamNumber,
  PULONG FrameLength
)
{...}
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nc-usbcamdi-pcam_new_frame_routine_ex)

PCAM_NEW_FRAME_ROUTINE_EX callback function

Description

A camera minidriver's CamNewVideoFrameEx callback function initializes a new video frame context structure.

Parameters

DeviceContext

Specifies the minidriver device context.

FrameContext

Specifies the frame context to be initialized.

StreamNumber

Indicates the stream associated with this new frame.

FrameLength

Pointer to the raw frame buffer length. The length is expressed in bytes. The camera minidriver may decrease this value if it does not require a buffer transfer on the USB bus of the specified size. The camera minidriver should not increase this value.

Remarks

USBCAMD calls the camera minidriver's CamNewVideoFrameEx callback function at IRQL = DISPATCH_LEVEL.

The original USBCAMD does not call CamNewVideoFrameEx.

This function is optional.

View the official Windows Driver Kit DDI reference

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