C Specification
When calling vkGetPhysicalDeviceVideoCapabilitiesKHR with
pVideoProfile->videoCodecOperation
specifying an encode operation, the
VkVideoEncodeIntraRefreshCapabilitiesKHR structure can be included in
the pNext
chain of the VkVideoCapabilitiesKHR structure to
retrieve capabilities specific to video encode intra refresh.
The VkVideoEncodeIntraRefreshCapabilitiesKHR
structure is defined as:
// Provided by VK_KHR_video_encode_intra_refresh
typedef struct VkVideoEncodeIntraRefreshCapabilitiesKHR {
VkStructureType sType;
void* pNext;
VkVideoEncodeIntraRefreshModeFlagsKHR intraRefreshModes;
uint32_t maxIntraRefreshCycleDuration;
uint32_t maxIntraRefreshActiveReferencePictures;
VkBool32 partitionIndependentIntraRefreshRegions;
VkBool32 nonRectangularIntraRefreshRegions;
} VkVideoEncodeIntraRefreshCapabilitiesKHR;
Members
-
sType
is a VkStructureType value identifying this structure. -
pNext
isNULL
or a pointer to a structure extending this structure. -
intraRefreshModes
is a bitmask of VkVideoEncodeIntraRefreshModeFlagBitsKHR values indicating the set of supported intra refresh modes. -
maxIntraRefreshCycleDuration
specifies the maximum supported intra refresh cycle duration. -
maxIntraRefreshActiveReferencePictures
is the maximum number of active reference pictures when encoding pictures with intra refresh enabled. This capability indicates additional restrictions beyond the maximum number of active reference pictures supported by the video profile, as reported in VkVideoCapabilitiesKHR::maxActiveReferencePictures
and the maximum requested at video session creation time in VkVideoSessionCreateInfoKHR::maxActiveReferencePictures
. -
partitionIndependentIntraRefreshRegions
specifies whether the implementation supports intra refresh regions that are independent of the picture partitioning used during encoding. If it isVK_TRUE
, then pictures can be encoded with multiple picture partitions, independent of the used intra refresh mode. Otherwise, pictures cannot be encoded with multiple picture partitions with any intra refresh mode other thanVK_VIDEO_ENCODE_INTRA_REFRESH_MODE_PER_PICTURE_PARTITION_BIT_KHR
.NoteThis capability is only indicative for AV1 encode profiles and does not impose any restrictions on the application as implementations may change the application requested picture partitioning according to implementation-specific restrictions.
-
nonRectangularIntraRefreshRegions
specifies whether the implementation supports non-rectangular intra refresh regions.NoteIf this capability is not supported, then using per picture partition intra refresh may impose additional restrictions on the number of picture partitions a picture can be encoded with.
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.