VkVideoDecodeH265DpbSlotInfoKHR

The VkVideoDecodeH265DpbSlotInfoKHR structure is defined as:

typedef struct VkVideoDecodeH265DpbSlotInfoKHR {
    VkStructureType sType;
    const void* pNext;
    const StdVideoDecodeH265ReferenceInfo* pStdReferenceInfo;
} VkVideoDecodeH265DpbSlotInfoKHR;

• 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 StdVideoDecodeH265ReferenceInfo structure specifying reference picture information described in section 8.3 of the ITU-T H.265 Specification.

This structure is specified in the pNext chain of VkVideoDecodeInfoKHR::pSetupReferenceSlot, if not NULL, and the pNext chain of the elements of VkVideoDecodeInfoKHR::pReferenceSlots to specify the codec-specific reference picture information for an H.265 decode operation.

Active Reference Picture Information

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

• The image subregion used is determined according to the H.265 Decode Picture Data Access section.
• The reference picture is associated with the DPB slot index specified in the slotIndex member of the corresponding element of VkVideoDecodeInfoKHR::pReferenceSlots.
• The reference picture is associated with the H.265 reference information provided in pStdReferenceInfo.

Reconstructed Picture Information

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

• The image subregion used is determined according to the H.265 Decode 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 VkVideoDecodeInfoKHR::pSetupReferenceSlot→slotIndex.
• The reconstructed picture is associated with the H.265 reference information provided in pStdReferenceInfo.

Std Reference Information

The members of the StdVideoDecodeH265ReferenceInfo structure pointed to by pStdReferenceInfo are interpreted as follows:

• flags.used_for_long_term_reference is used to indicate whether the picture is marked as used for long-term reference as defined in section 8.3.2 of the ITU-T H.265 Specification;
• flags.unused_for_reference is used to indicate whether the picture is marked as unused for reference as defined in section 8.3.2 of the ITU-T H.265 Specification;
• all other members are interpreted as defined in section 8.3 of the ITU-T H.265 Specification.