Package org.lwjgl.vulkan

Class VkVideoEncodeRateControlLayerInfoKHR

java.lang.Object
org.lwjgl.system.Pointer.Default
org.lwjgl.system.Struct<VkVideoEncodeRateControlLayerInfoKHR>
org.lwjgl.vulkan.VkVideoEncodeRateControlLayerInfoKHR
All Implemented Interfaces:
AutoCloseable, org.lwjgl.system.NativeResource, org.lwjgl.system.Pointer
public class VkVideoEncodeRateControlLayerInfoKHR extends org.lwjgl.system.Struct<VkVideoEncodeRateControlLayerInfoKHR> implements org.lwjgl.system.NativeResource
Structure to set encode per-layer rate control parameters.
Description

A codec-specific structure specifying additional per-layer rate control settings must be chained to VkVideoEncodeRateControlLayerInfoKHR. If multiple rate control layers are enabled (VkVideoEncodeRateControlInfoKHR::layerCount is greater than 1), then the chained codec-specific extension structure also identifies the specific video coding layer its parent VkVideoEncodeRateControlLayerInfoKHR applies to. If multiple rate control layers are enabled, the number of rate control layers must match the number of video coding layers. The specification for an encode codec-specific extension would describe how multiple video coding layers are enabled for the corresponding codec.

Per-layer rate control settings for all enabled rate control layers must be initialized or re-initialized whenever stream rate control settings are provided via VkVideoEncodeRateControlInfoKHR. This is done by specifying settings for all enabled rate control layers in VkVideoEncodeRateControlInfoKHR::pLayers.

It is possible for an application to enable multiple video coding layers (via codec-specific extensions to encoding operations) while only enabling a single layer of rate control for the entire video stream. To achieve this, layerCount in VkVideoEncodeRateControlInfoKHR must be set to 1, and the single VkVideoEncodeRateControlLayerInfoKHR provided in pLayers would apply to all encoded segments of the video stream, regardless of which codec-defined video coding layer they belong to. In this case, the implementation decides bitrate distribution across video coding layers (if applicable to the specified stream rate control mode).

Valid Usage (Implicit)
See Also

VkVideoEncodeRateControlInfoKHR

Layout


 struct VkVideoEncodeRateControlLayerInfoKHR {
     VkStructureType sType();
     void const * pNext();
     uint64_t averageBitrate();
     uint64_t maxBitrate();
     uint32_t frameRateNumerator();
     uint32_t frameRateDenominator();
 }