Registered Extension Number

40

Revision

14

Ratification Status

Ratified

Extension and Version Dependencies

Contact

Extension Proposal

Other Extension Metadata

Last Modified Date

2023-12-05

IP Status

No known IP claims.

Contributors
  • Ahmed Abdelkhalek, AMD

  • George Hao, AMD

  • Jake Beju, AMD

  • Chunbo Chen, Intel

  • Ping Liu, Intel

  • Srinath Kumarapuram, NVIDIA

  • Tony Zlatinski, NVIDIA

  • Ravi Chaudhary, NVIDIA

  • Daniel Rakos, RasterGrid

  • Aidan Fabius, Core Avionics & Industrial Inc.

  • Lynne Iribarren, Independent

Description

This extension builds upon the VK_KHR_video_encode_queue extension by adding support for encoding elementary video stream sequences compliant with the H.265/HEVC video compression standard.

Note

This extension was promoted to KHR from the provisional extension VK_EXT_video_encode_h265.

New Structures

New Enums

New Bitmasks

New Enum Constants

  • VK_KHR_VIDEO_ENCODE_H265_EXTENSION_NAME

  • VK_KHR_VIDEO_ENCODE_H265_SPEC_VERSION

  • Extending VkStructureType:

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_CAPABILITIES_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_DPB_SLOT_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_GOP_REMAINING_FRAME_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_NALU_SLICE_SEGMENT_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_PICTURE_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_PROFILE_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_QUALITY_LEVEL_PROPERTIES_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_RATE_CONTROL_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_RATE_CONTROL_LAYER_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_SESSION_CREATE_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_SESSION_PARAMETERS_ADD_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_SESSION_PARAMETERS_CREATE_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_SESSION_PARAMETERS_FEEDBACK_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H265_SESSION_PARAMETERS_GET_INFO_KHR

  • Extending VkVideoCodecOperationFlagBitsKHR:

    • VK_VIDEO_CODEC_OPERATION_ENCODE_H265_BIT_KHR

Version History

  • Revision 0, 2019-11-14 (Ahmed Abdelkhalek)

    • Initial draft

  • Revision 0.5, 2020-02-13 (Tony Zlatinski)

    • General Spec cleanup

    • Added DPB structures

    • Change the VCL frame encode structure

    • Added a common Non-VCL Picture Paramarameters structure

  • Revision 2, Oct 10 2021 (Srinath Kumarapuram)

    • Vulkan Video Encode h.265 update and spec edits

  • Revision 3, 2021-12-08 (Ahmed Abdelkhalek)

    • Rate control updates

  • Revision 4, 2022-01-11 (Ahmed Abdelkhalek)

    • Replace occurrences of “slice” by “slice segment” and rename structures/enums to reflect this.

  • Revision 5, 2022-02-10 (Ahmed Abdelkhalek)

    • Updates to encode capability interface

  • Revision 6, 2022-03-16 (Ahmed Abdelkhalek)

    • Relocate Std header version reporting/requesting from this extension to VK_KHR_video_queue extension.

    • Remove the now empty VkVideoEncodeH265SessionCreateInfoEXT.

  • Revision 7, 2022-03-24 (Ahmed Abdelkhalek)

    • Add capability flags to report support to disable transform skip and support to use B frame in L1 reference list.

  • Revision 8, 2022-07-18 (Daniel Rakos)

    • Replace VkVideoEncodeH265RateControlStructureFlagBitsEXT bit enum with VkVideoEncodeH265RateControlStructureEXT enum

    • Rename VkVideoEncodeH265ProfileEXT to VkVideoEncodeH265ProfileInfoEXT

    • Rename VkVideoEncodeH265ReferenceListsEXT to VkVideoEncodeH265ReferenceListsInfoEXT

    • Rename VkVideoEncodeH265EmitPictureParametersEXT to VkVideoEncodeH265EmitPictureParametersInfoEXT

    • Rename VkVideoEncodeH265NaluSliceSegmentEXT to VkVideoEncodeH265NaluSliceSegmentInfoEXT

  • Revision 9, 2022-09-18 (Daniel Rakos)

    • Rename vpsStdCount, pVpsStd, spsStdCount, pSpsStd, ppsStdCount, and pPpsStd to stdVPSCount, pStdVPSs, stdSPSCount, pStdSPSs, stdPPSCount, and pStdPPSs, respectively, in VkVideoEncodeH265SessionParametersAddInfoEXT

    • Rename maxVpsStdCount, maxSpsStdCount, and maxPpsStdCount to maxStdVPSCount, maxStdSPSCount and maxStdPPSCount, respectively, in VkVideoEncodeH265SessionParametersCreateInfoEXT

  • Revision 10, 2023-03-06 (Daniel Rakos)

    • Removed VkVideoEncodeH265EmitPictureParametersInfoEXT

    • Changed member types in VkVideoEncodeH265CapabilitiesEXT and VkVideoEncodeH265ReferenceListsInfoEXT from uint8_t to uint32_t

    • Changed the type of VkVideoEncodeH265RateControlInfoEXT::subLayerCount and VkVideoEncodeH265RateControlLayerInfoEXT::temporalId from uint8_t to uint32_t

    • Removed VkVideoEncodeH265InputModeFlagsEXT and VkVideoEncodeH265OutputModeFlagsEXT as we only support frame-in-frame-out mode for now

    • Rename pCurrentPictureInfo in VkVideoEncodeH265VclFrameInfoEXT to pStdPictureInfo

    • Rename pSliceSegmentHeaderStd in VkVideoEncodeH265NaluSliceSegmentInfoEXT to pStdSliceSegmentHeader

    • Rename pReferenceFinalLists in VkVideoEncodeH265VclFrameInfoEXT and VkVideoEncodeH265NaluSliceSegmentInfoEXT to pStdReferenceFinalLists

    • Removed the slotIndex member of VkVideoEncodeH265DpbSlotInfoEXT and changed it to be chained to VkVideoReferenceSlotInfoKHR

    • Replaced VkVideoEncodeH265ReferenceListsInfoEXT with the new Video Std header structure StdVideoEncodeH265ReferenceLists

    • Added new capability flag VK_VIDEO_ENCODE_H265_CAPABILITY_DIFFERENT_REFERENCE_FINAL_LISTS_BIT_EXT

  • Revision 11, 2023-05-26 (Daniel Rakos)

    • Renamed VkVideoEncodeH265VclFrameInfoEXT to VkVideoEncodeH265PictureInfoEXT

    • Removed VkVideoEncodeH265RateControlLayerInfoEXT::temporalId

    • Added expectDyadicTemporalSubLayerPattern capability

    • Added the VkVideoEncodeH265SessionParametersGetInfoEXT structure to identify the H.265 parameter sets to retrieve encoded parameter data for, and the VkVideoEncodeH265SessionParametersFeedbackInfoEXT structure to retrieve H.265 parameter set override information when using the new vkGetEncodedVideoSessionParametersKHR command

    • Added VkVideoEncodeH265NaluSliceSegmentInfoEXT::constantQp to specify per-slice segment constant QP when rate control mode is VK_VIDEO_ENCODE_RATE_CONTROL_MODE_DISABLED_BIT_KHR

    • Added VkVideoEncodeH265QualityLevelPropertiesEXT for retrieving H.265 specific quality level recommendations

    • Replaced VkVideoEncodeH265RateControlStructureEXT enum with the flags type VkVideoEncodeH265RateControlFlagsEXT and bits defined in VkVideoEncodeH265RateControlFlagBitsEXT and added HRD compliance flag

    • Removed useInitialRcQp and initialRcQp members of VkVideoEncodeH265RateControlLayerInfoEXT

    • Added prefersGopRemainingFrames and requiresGopRemainingFrames, and the new VkVideoEncodeH265GopRemainingFrameInfoEXT structure to allow specifying remaining frames of each type in the rate control GOP

    • Renamed maxSubLayersCount capability to maxSubLayerCount

    • Added maxQp, and minQp capabilities

    • Added maxLevelIdc capability and new VkVideoEncodeH265SessionCreateInfoEXT structure to specify upper bounds on the H.265 level of the produced video bitstream

    • Moved capability flags specific to codec syntax restrictions from VkVideoEncodeH265CapabilityFlagsEXT to the new VkVideoEncodeH265StdFlagsEXT which is now included as a separate stdSyntaxFlags member in VkVideoEncodeH265CapabilitiesEXT

    • Added std prefix to codec syntax capabilities in VkVideoEncodeH265CapabilitiesEXT

    • Removed VkVideoEncodeH265NaluSliceSegmentInfoEXT::ctbCount and VK_VIDEO_ENCODE_H265_CAPABILITY_SLICE_SEGMENT_CTB_COUNT_BIT_EXT

    • Replaced VK_VIDEO_ENCODE_H265_CAPABILITY_MULTIPLE_SLICE_SEGMENTS_PER_FRAME_BIT_EXT with the new maxSliceSegmentCount capability

    • Added maxTiles capability

    • Removed codec syntax min/max capabilities from VkVideoEncodeH265CapabilitiesEXT

    • Removed capability flag VK_VIDEO_ENCODE_H265_CAPABILITY_DIFFERENT_REFERENCE_FINAL_LISTS_BIT_EXT and removed pStdReferenceFinalLists members from the VkVideoEncodeH265PictureInfoEXT and VkVideoEncodeH265NaluSliceSegmentInfoEXT structures as reference lists info is now included in pStdPictureInfo

    • Added capability flag VK_VIDEO_ENCODE_H265_CAPABILITY_B_FRAME_IN_L0_LIST_BIT_EXT

  • Revision 12, 2023-07-19 (Daniel Rakos)

    • Added video std capability flags VK_VIDEO_ENCODE_H265_STD_SLICE_QP_DELTA_BIT_EXT and VK_VIDEO_ENCODE_H265_STD_DIFFERENT_SLICE_QP_DELTA_BIT_EXT

    • Fixed optionality of the array members of VkVideoEncodeH265SessionParametersAddInfoEXT

    • Fixed optionality of VkVideoEncodeH265RateControlInfoEXT::flags

  • Revision 13, 2023-09-04 (Daniel Rakos)

    • Change extension from EXT to KHR

    • Extension is no longer provisional

  • Revision 14, 2023-12-05 (Daniel Rakos)

    • Condition reference picture setup based on the value of StdVideoEncodeH265PictureInfo::flags.is_reference

See Also

Document Notes

For more information, see the Vulkan Specification

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

Copyright 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0