LPDXVA_PicEntry_AV1 - NtDoc

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

typedef struct _DXVA_PicEntry_AV1 {
  UINT   width;
  UINT   height;
  INT    wmmat[6];
  union {
    struct {
      UCHAR wminvalid : 1;
      UCHAR wmtype : 2;
      UCHAR Reserved : 5;
    };
    UCHAR GlobalMotionFlags;
  } DUMMYUNIONNAME;
  UCHAR  Index;
  UINT16 Reserved16Bits;
} DXVA_PicEntry_AV1, *LPDXVA_PicEntry_AV1;
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-dxva-dxva_picentry_av1)

Description

The DXVA_PicEntry_AV1 structure specifies a reference to an uncompressed surface, with the additional metadata necessary for referencing that surface.

Members

width

Specifies the coded width of the referred frame. This field corresponds to the frame_width_minus_1 syntax element. See Remarks.

height

Specifies the coded height of the referred frame. This field corresponds to the frame_height_minus_1 syntax element. See Remarks.

wmmat

The affine transformation matrix that applies globally to motion vectors referring to this frame.

DUMMYUNIONNAME

DUMMYUNIONNAME.wminvalid

Specifies whether the given global motion parameters are valid. If 0 then the parameters should be assumed to be invalid and not read.

DUMMYUNIONNAME.wmtype

Specifies the global motion type of this referred frame. This value matches the reference software’s TransformationType enum:

typedef enum {
  IDENTITY = 0,
  TRANSLATION = 1,
  ROTZOOM = 2,
  AFFINE = 3,
  TRANS_TYPES,
} TransformationType;

This attribute is informational, to help validate the contents of wmmat.

DUMMYUNIONNAME.Reserved

Reserved; do not use.

DUMMYUNIONNAME.GlobalMotionFlags

Global motion parameters.

Index

Identifies the index into ref_frame_map_texture_index[] to identify the frame used as a reference for this picture. When Index does not contain an index to a valid reference, the value shall be set to 255, to indicate that the index is invalid.

Reserved16Bits

Reserved; do not use.

Remarks

If width and height are derived for the frame (for example via the frame_size_override_flag), the host decoder will derive the appropriate values and store the result in these fields. Each AV1 frame may be coded at a different resolution than the previous frame(s).

See the Direct X Video Acceleration Specification for AV1 Video Coding for detailed information, including how to use this structure.

View the official Windows Driver Kit DDI reference

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