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Showing content from https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VK_KHR_video_decode_queue.html below:

VK_KHR_video_decode_queue(3)

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Registered Extension Number Extension and Version Dependencies API Interactions

Interacts with VK_VERSION_1_3
Interacts with VK_KHR_format_feature_flags2

Last Modified Date

2023-12-05

IP Status

No known IP claims.

Contributors

Ahmed Abdelkhalek, AMD
Jake Beju, AMD
Olivier Lapicque, NVIDIA
Peter Fang, AMD
Piers Daniell, NVIDIA
Srinath Kumarapuram, NVIDIA
Tony Zlatinski, NVIDIA
Daniel Rakos, RasterGrid

Description

This extension builds upon the VK_KHR_video_queue extension by adding common APIs specific to video decoding and thus enabling implementations to expose queue families supporting video decode operations.

More specifically, it adds video decode specific capabilities and a new command buffer command that allows recording video decode operations against a video session.

This extension is to be used in conjunction with other codec specific video decode extensions that enable decoding video sequences of specific video compression standards.

New Enum Constants

VK_KHR_VIDEO_DECODE_QUEUE_EXTENSION_NAME
VK_KHR_VIDEO_DECODE_QUEUE_SPEC_VERSION
Extending VkAccessFlagBits2:
- VK_ACCESS_2_VIDEO_DECODE_READ_BIT_KHR
- VK_ACCESS_2_VIDEO_DECODE_WRITE_BIT_KHR
Extending VkBufferUsageFlagBits:
- VK_BUFFER_USAGE_VIDEO_DECODE_DST_BIT_KHR
- VK_BUFFER_USAGE_VIDEO_DECODE_SRC_BIT_KHR
Extending VkFormatFeatureFlagBits:
- VK_FORMAT_FEATURE_VIDEO_DECODE_DPB_BIT_KHR
- VK_FORMAT_FEATURE_VIDEO_DECODE_OUTPUT_BIT_KHR
Extending VkImageLayout:
- VK_IMAGE_LAYOUT_VIDEO_DECODE_DPB_KHR
- VK_IMAGE_LAYOUT_VIDEO_DECODE_DST_KHR
- VK_IMAGE_LAYOUT_VIDEO_DECODE_SRC_KHR
Extending VkImageUsageFlagBits:
- VK_IMAGE_USAGE_VIDEO_DECODE_DPB_BIT_KHR
- VK_IMAGE_USAGE_VIDEO_DECODE_DST_BIT_KHR
- VK_IMAGE_USAGE_VIDEO_DECODE_SRC_BIT_KHR
Extending VkPipelineStageFlagBits2:
- VK_PIPELINE_STAGE_2_VIDEO_DECODE_BIT_KHR
Extending VkQueueFlagBits:
- VK_QUEUE_VIDEO_DECODE_BIT_KHR
Extending VkStructureType:
- VK_STRUCTURE_TYPE_VIDEO_DECODE_CAPABILITIES_KHR
- VK_STRUCTURE_TYPE_VIDEO_DECODE_INFO_KHR
- VK_STRUCTURE_TYPE_VIDEO_DECODE_USAGE_INFO_KHR

If VK_KHR_format_feature_flags2 or Vulkan Version 1.3 is supported:

Extending VkFormatFeatureFlagBits2:
- VK_FORMAT_FEATURE_2_VIDEO_DECODE_DPB_BIT_KHR
- VK_FORMAT_FEATURE_2_VIDEO_DECODE_OUTPUT_BIT_KHR

Version History

Revision 1, 2018-6-11 (Peter Fang)
Revision 1.5, Nov 09 2018 (Tony Zlatinski)
Revision 1.6, Jan 08 2020 (Tony Zlatinski)
- API unify with the video_encode_queue spec
Revision 1.7, March 29 2021 (Tony Zlatinski)
Revision 2, September 30 2021 (Jon Leech)
Revision 3, 2022-02-25 (Ahmed Abdelkhalek)
- Add VkVideoDecodeCapabilitiesKHR with new flags to report support for decode DPB and output coinciding in the same image, or in distinct images.
Revision 4, 2022-03-31 (Ahmed Abdelkhalek)
- Remove redundant VkVideoDecodeInfoKHR.coded{Offset|Extent}
Revision 5, 2022-07-18 (Daniel Rakos)
- Remove VkVideoDecodeFlagBitsKHR as it contains no defined flags for now
Revision 6, 2022-08-12 (Daniel Rakos)
- Add VkVideoDecodeUsageInfoKHR structure and related flags
Revision 7, 2022-09-29 (Daniel Rakos)
- Extension is no longer provisional
Revision 8, 2023-12-05 (Daniel Rakos)
- Require the specification of a reconstructed picture in all cases, except when the video session was created with no DPB slots to match shipping implementations
- Make DPB slot activation behavior codec-specific to continue allowing application control over reference picture setup now that a reconstructed picture is always mandatory