IDDCX_FRAME_STATISTICS - NtDoc

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

struct IDDCX_FRAME_STATISTICS {
  UINT                         Size;
  UINT                         PresentationFrameNumber;
  IDDCX_FRAME_STATUS           FrameStatus;
  UINT                         ReEncodeNumber;
  UINT                         FrameSliceTotal;
  UINT                         CurrentSlice;
  UINT64                       FrameAcquireQpcTime;
  UINT                         FrameProcessingStepsCount;
  IDDCX_FRAME_STATISTICS_STEP  *pFrameProcessingStep;
  UINT64                       SendStartQpcTime;
  UINT64                       SendStopQpcTime;
  UINT64                       SendCompleteQpcTime;
  IDDCX_FRAME_STATISTICS_FLAGS Flags;
  UINT                         ProcessedPixelCount;
  UINT                         FrameSizeInBytes;
};
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Windows Driver Kit DDI reference (ns-iddcx-iddcx_frame_statistics)

IDDCX_FRAME_STATISTICS structure

Description

The IDDCX_FRAME_STATISTICS structure provides information about the current frame being processed.

Members

Size

Total size of this structure, in bytes.

PresentationFrameNumber

The frame number provided in a prior call to IddCxSwapChainReleaseAndAcquireBuffer (or IddCxSwapChainReleaseAndAcquireSystemBuffer).

FrameStatus

An IDDCX_FRAME_STATUS value that indicates the overall status of processing this frame.

ReEncodeNumber

A zero-based number to indicate the number of times the same frame has been encoded and sent. Re-encodes can be the result of the OS providing the same frame and frame number to the driver to encode or the driver having to re-encode outside of the normal OS presentation to satisfy the protocol.

FrameSliceTotal

The number of slices the driver processes the frame in. If slices are not used, then this should be set to the value one.

CurrentSlice

The zero-based slice number being reported. If slicing is not supported, then the driver should always set this to the value zero.

FrameAcquireQpcTime

System QPC time at which the driver acquired the buffer from the OS.

FrameProcessingStepsCount

The size of the frame step array pointed to by pFrameProcessingStep.

pFrameProcessingStep

An array of IDDCX_FRAME_STATISTICS_STEP structures that describe the frame processing steps the driver performed.

SendStartQpcTime

Marks the time when the driver started transmission for this slice to the device. SendStartQpcTime marks the time the driver started calling the transmit APIs, not when the data actually starts being transmitted.

SendStopQpcTime

Marks the time when the driver stopped transmission for this slice to the device. SendStopQpcTime marks the time the driver stopped calling the transmit APIs, not when the data actually stops being transmitted.

SendCompleteQpcTime

Marks the time when the send was reported as complete by the OS. This is an optional time stamp that can be used if the driver uses an asynchronous transmit API and a completion routine. In the event the driver does not have an asynchronous completion routine, this value should be set to zero.

Flags

A IDDCX_FRAME_STATISTICS_FLAGS value that indicates how the frame was altered by the driver.

ProcessedPixelCount

The total number of pixels processed in this frame.

FrameSizeInBytes

Total size of the data sent to the device for this frame. This value includes all the slices.

See also

IDDCX_FRAME_STATISTICS_FLAGS

IDDCX_FRAME_STATISTICS_STEP

IddCxSwapChainReleaseAndAcquireBuffer

IddCxSwapChainReleaseAndAcquireSystemBuffer

View the official Windows Driver Kit DDI reference

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