VkVideoEncodeH265QualityLevelPropertiesKHR

When calling vkGetPhysicalDeviceVideoEncodeQualityLevelPropertiesKHR with pVideoProfile→videoCodecOperation specified as VK_VIDEO_CODEC_OPERATION_ENCODE_H265_BIT_KHR, the VkVideoEncodeH265QualityLevelPropertiesKHR structure must be included in the pNext chain of the VkVideoEncodeQualityLevelPropertiesKHR structure to retrieve additional video encode quality level properties specific to H.265 encoding.

The VkVideoEncodeH265QualityLevelPropertiesKHR structure is defined as:

typedef struct VkVideoEncodeH265QualityLevelPropertiesKHR {
    VkStructureType sType;
    void* pNext;
    VkVideoEncodeH265RateControlFlagsKHR preferredRateControlFlags;
    uint32_t preferredGopFrameCount;
    uint32_t preferredIdrPeriod;
    uint32_t preferredConsecutiveBFrameCount;
    uint32_t preferredSubLayerCount;
    VkVideoEncodeH265QpKHR preferredConstantQp;
    uint32_t preferredMaxL0ReferenceCount;
    uint32_t preferredMaxL1ReferenceCount;
} VkVideoEncodeH265QualityLevelPropertiesKHR;

• sType is a VkStructureType value identifying this structure.
• pNext is NULL or a pointer to a structure extending this structure.
• preferredRateControlFlags is a bitmask of VkVideoEncodeH265RateControlFlagBitsKHR values indicating the preferred flags to use for VkVideoEncodeH265RateControlInfoKHR::flags.
• preferredGopFrameCount indicates the preferred value to use for VkVideoEncodeH265RateControlInfoKHR::gopFrameCount.
• preferredIdrPeriod indicates the preferred value to use for VkVideoEncodeH265RateControlInfoKHR::idrPeriod.
• preferredConsecutiveBFrameCount indicates the preferred value to use for VkVideoEncodeH265RateControlInfoKHR::consecutiveBFrameCount.
• preferredSubLayerCount indicates the preferred value to use for VkVideoEncodeH265RateControlInfoKHR::subLayerCount.
• preferredConstantQp indicates the preferred values to use for VkVideoEncodeH265NaluSliceSegmentInfoKHR::constantQp for each picture type when using rate control mode VK_VIDEO_ENCODE_RATE_CONTROL_MODE_DISABLED_BIT_KHR.
• preferredMaxL0ReferenceCount indicates the preferred maximum number of reference pictures to use in the reference list L0.
• preferredMaxL1ReferenceCount indicates the preferred maximum number of reference pictures to use in the reference list L1.