# VkVideoDecodeAV1SessionParametersCreateInfoKHR(3) Manual Page

## Name

VkVideoDecodeAV1SessionParametersCreateInfoKHR - Structure specifies AV1 decoder parameter set information

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## C Specification

When a video session parameters object is created with the codec operation `VK_VIDEO_CODEC_OPERATION_DECODE_AV1_BIT_KHR`, the VkVideoSessionParametersCreateInfoKHR::`pNext` chain must include a `VkVideoDecodeAV1SessionParametersCreateInfoKHR` structure specifying the contents of the object.

The `VkVideoDecodeAV1SessionParametersCreateInfoKHR` structure is defined as:

    // Provided by VK_KHR_video_decode_av1
    typedef struct VkVideoDecodeAV1SessionParametersCreateInfoKHR {
        VkStructureType                     sType;
        const void*                         pNext;
        const StdVideoAV1SequenceHeader*    pStdSequenceHeader;
    } VkVideoDecodeAV1SessionParametersCreateInfoKHR;

## Members

- `sType` is a VkStructureType value identifying this structure.

- `pNext` is `NULL` or a pointer to a structure extending this structure.

- `pStdSequenceHeader` is a pointer to a `StdVideoAV1SequenceHeader` structure describing the AV1 sequence header entry to store in the created object.

## Description

Note | As AV1 video session parameters objects will only ever contain a single AV1 sequence header, this has to be specified at object creation time and such video session parameters objects cannot be updated using the vkUpdateVideoSessionParametersKHR command. When a new AV1 sequence header is decoded from the input video bitstream the application needs to create a new video session parameters object to store it.

Valid Usage (Implicit)

- VUID-VkVideoDecodeAV1SessionParametersCreateInfoKHR-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_VIDEO_DECODE_AV1_SESSION_PARAMETERS_CREATE_INFO_KHR`

- VUID-VkVideoDecodeAV1SessionParametersCreateInfoKHR-pStdSequenceHeader-parameter
  `pStdSequenceHeader` must be a valid pointer to a valid `StdVideoAV1SequenceHeader` value

## See Also

VK_KHR_video_decode_av1, VkStructureType

## 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.

## Copyright

Copyright 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0