D3D12DDI_VIDEO_ENCODER_AV1_REFERENCE_PICTURE_DESCRIPTOR_0095 structure (d3d12umddi.h)

The D3D12DDI_VIDEO_ENCODER_AV1_REFERENCE_PICTURE_DESCRIPTOR_0095 structure describes a reference picture used in AV1 encoding.

Syntax

typedef struct D3D12DDI_VIDEO_ENCODER_AV1_REFERENCE_PICTURE_DESCRIPTOR_0095 {
  UINT                                                                 ReconstructedPictureResourceIndex;
  UINT                                                                 TemporalLayerIndexPlus1;
  UINT                                                                 SpatialLayerIndexPlus1;
  D3D12DDI_VIDEO_ENCODER_AV1_FRAME_TYPE_0095                           FrameType;
  D3D12DDI_VIDEO_ENCODER_AV1_REFERENCE_PICTURE_WARPED_MOTION_INFO_0095 WarpedMotionInfo;
  UINT                                                                 OrderHint;
  UINT                                                                 PictureIndex;
} D3D12DDI_VIDEO_ENCODER_AV1_REFERENCE_PICTURE_DESCRIPTOR_0095;

Members

ReconstructedPictureResourceIndex

Maps the current reference picture described by this structure to a resource in the D3D12DDI_VIDEO_ENCODER_PICTURE_CONTROL_DESC_0082_0.ReferenceFrames array.

If the associated slot in ReferenceFramesReconPictureDescriptors containing this structure has a valid ReconstructedPictureResourceIndex reference to the D3D12DDI_VIDEO_ENCODER_PICTURE_CONTROL_DESC_0082_0.ReferenceFrames array then the allowed range of values is [0..254]. Otherwise, if it corresponds to an empty/unused slot in the decoded picture buffer (DPB), then the value must be set to D3D12_VIDEO_ENCODER_AV1_INVALID_DPB_RESOURCE_INDEX.

TemporalLayerIndexPlus1

The temporal layer index of the reference picture incremented by one of the previously encoded frame now used as reference.

SpatialLayerIndexPlus1

Picture spatial layer index plus one of the previously encoded frame now used as reference.

FrameType

A **D3D12DDI_VIDEO_ENCODER_AV1_FRAME_TYPE_0095 value that specifies the type of frame used to encode the described reference frame associated to this entry.

WarpedMotionInfo

A D3D12DDI_VIDEO_ENCODER_AV1_REFERENCE_PICTURE_WARPED_MOTION_INFO_0095 structure that contains the global motion parameters. Only used if supported in D3D12DDI_VIDEO_ENCODER_AV1_REFERENCE_WARPED_MOTION_TRANSFORMATION_0095_FLAGS.

OrderHint

The reference ref_order_hint AV1 syntax. Even when reference order hints are not coded in the AV1 bitstream, OrderHint here must be set to the value used in D3D12DDI_VIDEO_ENCODER_AV1_PICTURE_CONTROL_CODEC_DATA_0095.OrderHint for the previously encoded frame that is now being held as reference by this descriptor. This information hints to the driver, in a frame type that allows frame references, which are from past frames and which are from future frames (in display order) when comparing against the current frame value of D3D12DDI_VIDEO_ENCODER_AV1_PICTURE_CONTROL_CODEC_DATA_0095.OrderHint.

PictureIndex

The unique picture index of the previously encoded frame that is stored in this entry as a reference. This parameter is not related in any way to the AV1 standard syntax, but merely used for API client implementation tracking instead.

Remarks

See D3D12 AV1 video encoding for more information.

Requirements

See also

D3D12DDI_VIDEO_ENCODER_AV1_PICTURE_CONTROL_CODEC_DATA_0095