C Specification
When calling vkGetPhysicalDeviceVideoFormatPropertiesKHR, the
VkVideoFormatQuantizationMapPropertiesKHR structure can be included
in the pNext chain of the VkVideoFormatPropertiesKHR structure
to retrieve video format properties specific to video encode quantization
maps.
The VkVideoFormatQuantizationMapPropertiesKHR structure is defined as:
// Provided by VK_KHR_video_encode_quantization_map
typedef struct VkVideoFormatQuantizationMapPropertiesKHR {
VkStructureType sType;
void* pNext;
VkExtent2D quantizationMapTexelSize;
} VkVideoFormatQuantizationMapPropertiesKHR;
Members
-
sTypeis a VkStructureType value identifying this structure. -
pNextisNULLor a pointer to a structure extending this structure. -
quantizationMapTexelSizeindicates the quantization map texel size of the video format, i.e. the number of pixels corresponding to each quantization map texel.
Description
The values returned in this structure are only defined if the allowed image
usage flags returned in
VkVideoFormatPropertiesKHR::imageUsageFlags for this video
format include
VK_IMAGE_USAGE_VIDEO_ENCODE_QUANTIZATION_DELTA_MAP_BIT_KHR or
VK_IMAGE_USAGE_VIDEO_ENCODE_EMPHASIS_MAP_BIT_KHR.
Implementations may support multiple quantization map texel sizes for a
particular video format which is indicated by
vkGetPhysicalDeviceVideoFormatPropertiesKHR returning multiple entries
with different quantizationMapTexelSize values.
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.