Package org.lwjgl.vulkan

Class VkVideoDecodeAV1DpbSlotInfoKHR

java.lang.Object
org.lwjgl.system.Pointer.Default
org.lwjgl.system.Struct<VkVideoDecodeAV1DpbSlotInfoKHR>
org.lwjgl.vulkan.VkVideoDecodeAV1DpbSlotInfoKHR
All Implemented Interfaces:
AutoCloseable, org.lwjgl.system.NativeResource, org.lwjgl.system.Pointer
public class VkVideoDecodeAV1DpbSlotInfoKHR extends org.lwjgl.system.Struct<VkVideoDecodeAV1DpbSlotInfoKHR> implements org.lwjgl.system.NativeResource
Structure specifies AV1 DPB information when decoding a frame.
Description

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 AV1 decode operation.

Active Reference Picture Information
Reconstructed Picture Information
Std Reference Information
  • 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;
  • frame_type is interpreted as defined in section 6.8.2 of the AV1 Specification;
    Note

    The frame_type member is defined with the type uint8_t, but it takes the same values defined in the StdVideoAV1FrameType enumeration type as StdVideoDecodeAV1PictureInfo::frame_type.

  • RefFrameSignBias is a bitmask where bit index i corresponds to RefFrameSignBias[i] 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;
  • SavedOrderHints is interpreted as defined in section 7.20 of the AV1 Specification.
    Note

    When the AV1 reference information is provided for the reconstructed picture, certain parameters (e.g. frame_type) are specified both in the AV1 picture information and in the AV1 reference information. This is necessary because unlike the AV1 picture information, which is only used for the purposes of the video decode operation in question, the AV1 reference information specified for the reconstructed picture may be associated with the activated DPB slot, meaning that some implementations may maintain it as part of the reference picture metadata corresponding to the video picture resource associated with the DPB slot. When the AV1 reference information is provided for an active reference picture, the specified parameters correspond to the parameters specified when the DPB slot was activated (set up) with the reference picture, as usual, in order to communicate these parameters for implementations that do not maintain any subset of these parameters as part of the DPB slot’s reference picture metadata.

Valid Usage (Implicit)

Layout


 struct VkVideoDecodeAV1DpbSlotInfoKHR {
     VkStructureType sType();
     void const * pNext();
     StdVideoDecodeAV1ReferenceInfo const * pStdReferenceInfo();
 }