C Specification
The VkVideoEncodeAV1DpbSlotInfoKHR structure is defined as:
// Provided by VK_KHR_video_encode_av1
typedef struct VkVideoEncodeAV1DpbSlotInfoKHR {
VkStructureType sType;
const void* pNext;
const StdVideoEncodeAV1ReferenceInfo* pStdReferenceInfo;
} VkVideoEncodeAV1DpbSlotInfoKHR;
Members
-
sType
is a VkStructureType value identifying this structure. -
pNext
isNULL
or a pointer to a structure extending this structure. -
pStdReferenceInfo
is a pointer to aStdVideoEncodeAV1ReferenceInfo
structure specifying AV1 reference information.
Description
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 bypStdReferenceInfo
are interpreted as follows:-
flags.reserved
andreserved1
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 theRefFrameId
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
isNULL
or a pointer to aStdVideoEncodeAV1ExtensionHeader
structure whosetemporal_id
andspatial_id
members specify the temporal and spatial layer ID of the reference frame, respectively.
-
Document Notes
For more information, see the Vulkan Specification
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.