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
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 11, version 24H2 (WDDM 3.2) |
| Header | d3d12umddi.h |