VkVideoEncodeAV1DpbSlotInfoKHR

The VkVideoEncodeAV1DpbSlotInfoKHR structure is defined as:

typedef struct VkVideoEncodeAV1DpbSlotInfoKHR {
    VkStructureType sType;
    const void* pNext;
    const StdVideoEncodeAV1ReferenceInfo* pStdReferenceInfo;
} VkVideoEncodeAV1DpbSlotInfoKHR;

• sType is a VkStructureType value identifying this structure.
• pNext is NULL or a pointer to a structure extending this structure.
• pStdReferenceInfo is a pointer to a StdVideoEncodeAV1ReferenceInfo structure specifying AV1 reference information.

This structure is specified in the pNext chain of VkVideoEncodeInfoKHR::pSetupReferenceSlot, if not NULL, and the pNext chain of the elements of VkVideoEncodeInfoKHR::pReferenceSlots to specify the codec-specific reference picture information for an AV1 encode operation.

Active Reference Picture Information

When this structure is specified in the pNext chain of the elements of VkVideoEncodeInfoKHR::pReferenceSlots, one element is added to the list of active reference pictures used by the video encode operation for each element of VkVideoEncodeInfoKHR::pReferenceSlots as follows:

• The image subregion used is determined according to the AV1 Encode Picture Data Access section.
• The reference picture is associated with the DPB slot index specified in the slotIndex member of the corresponding element of VkVideoEncodeInfoKHR::pReferenceSlots.
• The reference picture is associated with the AV1 reference information provided in pStdReferenceInfo.

Reconstructed Picture Information

When this structure is specified in the pNext chain of VkVideoEncodeInfoKHR::pSetupReferenceSlot, the information related to the reconstructed picture is defined as follows:

• The image subregion used is determined according to the AV1 Encode Picture Data Access section.
• If reference picture setup is requested, then the reconstructed picture is used to activate the DPB slot with the index specified in VkVideoEncodeInfoKHR::pSetupReferenceSlot→slotIndex.
• The reconstructed picture is associated with the AV1 reference information provided in pStdReferenceInfo.

Std Reference Information

The members of the StdVideoEncodeAV1ReferenceInfo structure pointed to by pStdReferenceInfo are interpreted as follows:

• flags.reserved and reserved1 are used only for padding purposes and are otherwise ignored;
• flags.disable_frame_end_update_cdf is interpreted as defined in section 6.8.2 of the AV1 Specification;
• flags.segmentation_enabled is interpreted as defined in section 6.8.13 of the AV1 Specification;
• RefFrameId is interpreted as the element of the RefFrameId array defined in section 6.8.2 of the AV1 Specification corresponding to the reference frame;
• frame_type is interpreted as defined in section 6.8.2 of the AV1 Specification;
• OrderHint is interpreted as defined in section 6.8.2 of the AV1 Specification;
• pExtensionHeader is NULL or a pointer to a StdVideoEncodeAV1ExtensionHeader structure whose temporal_id and spatial_id members specify the temporal and spatial layer ID of the reference frame, respectively.