xref: /third_party/vk-gl-cts/external/vulkan-docs/src/chapters/video/h265_decode.adoc

// Copyright 2018-2024 The Khronos Group Inc.
//
// SPDX-License-Identifier: CC-BY-4.0

[[decode-h265]]
== H.265 Decode Operations

Video decode operations using an <<decode-h265-profile,H.265 decode
profile>> can: be used to decode elementary video stream sequences compliant
to the <<itu-t-h265,ITU-T H.265 Specification>>.

[NOTE]
.Note
====
Refer to the <<preamble,Preamble>> for information on how the Khronos
Intellectual Property Rights Policy relates to normative references to
external materials not created by Khronos.
====

This process is performed according to the <<decode-operation-steps,video
decode operation steps>> with the codec-specific semantics defined in
section 8 of <<itu-t-h265,ITU-T H.265 Specification>>:

  * Syntax elements, derived values, and other parameters are applied from
    the following structures:
  ** The code:StdVideoH265VideoParameterSet structure corresponding to the
     <<decode-h265-active-vps,active VPS>> specifying the <<decode-h265-vps,
     H.265 video parameter set>>.
  ** The code:StdVideoH265SequenceParameterSet structure corresponding to
     the <<decode-h265-active-sps,active SPS>> specifying the
     <<decode-h265-sps, H.265 sequence parameter set>>.
  ** The code:StdVideoH265PictureParameterSet structure corresponding to the
     <<decode-h265-active-pps,active PPS>> specifying the <<decode-h265-pps,
     H.265 picture parameter set>>.
  ** The code:StdVideoDecodeH265PictureInfo structure specifying the
     <<decode-h265-picture-info,H.265 picture information>>.
  ** The code:StdVideoDecodeH265ReferenceInfo structures specifying the
     <<decode-h265-reference-info,H.265 reference information>>
     corresponding to the optional <<reconstructed-picture,reconstructed
     picture>> and any <<active-reference-pictures,active reference
     pictures>>.
  * The contents of the provided video bitstream buffer range are
    interpreted as defined in the <<decode-h265-bitstream-data-access,H.265
    Decode Bitstream Data Access>> section.
  * Picture data in the <<video-picture-resources,video picture resources>>
    corresponding to the used <<decode-h265-active-reference-picture-info,
    active reference pictures>>, <<decode-h265-output-picture-info,decode
    output picture>>, and optional <<decode-h265-reconstructed-picture-info,
    reconstructed picture>> is accessed as defined in the
    <<decode-h265-picture-data-access,H.265 Decode Picture Data Access>>
    section.
  * The decision on <<decode-ref-pic-setup,reference picture setup>> is made
    according to the parameters specified in the
    <<decode-h265-ref-pic-setup,H.265 picture information>>.

If the parameters and the bitstream adhere to the syntactic and semantic
requirements defined in the corresponding sections of the <<itu-t-h265,ITU-T
H.265 Specification>>, as described above, and the <<dpb-slot,DPB slots>>
associated with the <<active-reference-pictures,active reference pictures>>
all refer to <<dpb-slot-states,valid picture references>>, then the video
decode operation will complete successfully.
Otherwise, the video decode operation may: complete
<<decode-unsuccessful,unsuccessfully>>.


[[decode-h265-bitstream-data-access]]
=== H.265 Decode Bitstream Data Access

The video bitstream buffer range should: contain a VCL NAL unit comprised of
the slice segment headers and data of a picture representing a frame, as
defined in sections 7.3.6 and 7.3.8, and this data is interpreted as defined
in sections 7.4.7 and 7.4.9 of the <<itu-t-h265, ITU-T H.265
Specification>>, respectively.

The offsets provided in
slink:VkVideoDecodeH265PictureInfoKHR::pname:pSliceSegmentOffsets should:
specify the starting offsets corresponding to each slice segment header
within the video bitstream buffer range.


[[decode-h265-picture-data-access]]
=== H.265 Decode Picture Data Access

Accesses to image data within a video picture resource happen at the
granularity indicated by
slink:VkVideoCapabilitiesKHR::pname:pictureAccessGranularity, as returned by
flink:vkGetPhysicalDeviceVideoCapabilitiesKHR for the used <<video-profiles,
video profile>>.
Accordingly, the complete image subregion of a
<<decode-output-picture,decode output picture>>,
<<reference-picture,reference picture>>, or
<<reconstructed-picture,reconstructed picture>> accessed by video coding
operations using an <<decode-h265-profile,H.265 decode profile>> is defined
as the set of texels within the coordinate range:

  {empty}:: [eq]#([0,pname:endX),[0,pname:endY))#

Where:

  * [eq]#pname:endX# equals [eq]#pname:codedExtent.width# rounded up to the
    nearest integer multiple of pname:pictureAccessGranularity.width and
    clamped to the width of the image subresource
    <<video-image-subresource-reference,referred>> to by the corresponding
    slink:VkVideoPictureResourceInfoKHR structure;
  * [eq]#endY# equals [eq]#pname:codedExtent.height# rounded up to the
    nearest integer multiple of pname:pictureAccessGranularity.height and
    clamped to the height of the image subresource
    <<video-image-subresource-reference, referred>> to by the corresponding
    slink:VkVideoPictureResourceInfoKHR structure;

Where pname:codedExtent is the member of the
slink:VkVideoPictureResourceInfoKHR structure corresponding to the picture.

In case of video decode operations using an <<decode-h265-profile,H.265
decode profile>>, any access to a picture at the coordinates
[eq]#(pname:x,pname:y)#, as defined by the <<itu-t-h265,ITU-T H.265
Specification>>, is an access to the image subresource
<<video-image-subresource-reference,referred>> to by the corresponding
slink:VkVideoPictureResourceInfoKHR structure at the texel coordinates
[eq]#(pname:x,pname:y)#.


[[decode-h265-profile]]
=== H.265 Decode Profile

[open,refpage='VkVideoDecodeH265ProfileInfoKHR',desc='Structure specifying H.265 decode profile',type='structs']
--
A video profile supporting H.265 video decode operations is specified by
setting slink:VkVideoProfileInfoKHR::pname:videoCodecOperation to
ename:VK_VIDEO_CODEC_OPERATION_DECODE_H265_BIT_KHR and adding a
sname:VkVideoDecodeH265ProfileInfoKHR structure to the
slink:VkVideoProfileInfoKHR::pname:pNext chain.

The sname:VkVideoDecodeH265ProfileInfoKHR structure is defined as:

include::{generated}/api/structs/VkVideoDecodeH265ProfileInfoKHR.adoc[]

  * pname:sType is a elink:VkStructureType value identifying this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:stdProfileIdc is a code:StdVideoH265ProfileIdc value specifying
    the H.265 codec profile IDC, as defined in section A.3 of the
    <<itu-t-h265,ITU-T H.265 Specification>>.

include::{generated}/validity/structs/VkVideoDecodeH265ProfileInfoKHR.adoc[]
--


=== H.265 Decode Capabilities

[open,refpage='VkVideoDecodeH265CapabilitiesKHR',desc='Structure describing H.265 decode capabilities',type='structs']
--
When calling flink:vkGetPhysicalDeviceVideoCapabilitiesKHR to query the
capabilities for an <<decode-h265-profile,H.265 decode profile>>, the
slink:VkVideoCapabilitiesKHR::pname:pNext chain must: include a
sname:VkVideoDecodeH265CapabilitiesKHR structure that will be filled with
the profile-specific capabilities.

The sname:VkVideoDecodeH265CapabilitiesKHR structure is defined as:

include::{generated}/api/structs/VkVideoDecodeH265CapabilitiesKHR.adoc[]

  * pname:sType is a elink:VkStructureType value identifying this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:maxLevelIdc is a code:StdVideoH265LevelIdc value indicating the
    maximum H.265 level supported by the profile, where enum constant
    `STD_VIDEO_H265_LEVEL_IDC_<major>_<minor>` identifies H.265 level
    `<major>.<minor>` as defined in section A.4 of the <<itu-t-h265,ITU-T
    H.265 Specification>>.

include::{generated}/validity/structs/VkVideoDecodeH265CapabilitiesKHR.adoc[]
--


[[decode-h265-parameter-sets]]
=== H.265 Decode Parameter Sets

<<video-session-parameters,Video session parameters>> objects created with
the video codec operation ename:VK_VIDEO_CODEC_OPERATION_DECODE_H265_BIT_KHR
can: contain the following types of parameters:

:operationType: decode
include::{chapters}/video/h265_parameter_sets.adoc[]

[open,refpage='VkVideoDecodeH265SessionParametersCreateInfoKHR',desc='Structure specifies H.265 decoder parameter set information',type='structs']
--
When a <<video-session-parameters,video session parameters>> object is
created with the codec operation
ename:VK_VIDEO_CODEC_OPERATION_DECODE_H265_BIT_KHR, the
slink:VkVideoSessionParametersCreateInfoKHR::pname:pNext chain must: include
a sname:VkVideoDecodeH265SessionParametersCreateInfoKHR structure specifying
the capacity and initial contents of the object.

The sname:VkVideoDecodeH265SessionParametersCreateInfoKHR structure is
defined as:

include::{generated}/api/structs/VkVideoDecodeH265SessionParametersCreateInfoKHR.adoc[]

  * pname:sType is a elink:VkStructureType value identifying this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:maxStdVPSCount is the maximum number of <<decode-h265-vps,H.265
    VPS>> entries the created sname:VkVideoSessionParametersKHR can:
    contain.
  * pname:maxStdSPSCount is the maximum number of <<decode-h265-sps,H.265
    SPS>> entries the created sname:VkVideoSessionParametersKHR can:
    contain.
  * pname:maxStdPPSCount is the maximum number of <<decode-h265-pps,H.265
    PPS>> entries the created sname:VkVideoSessionParametersKHR can:
    contain.
  * pname:pParametersAddInfo is `NULL` or a pointer to a
    slink:VkVideoDecodeH265SessionParametersAddInfoKHR structure specifying
    H.265 parameters to add upon object creation.

include::{generated}/validity/structs/VkVideoDecodeH265SessionParametersCreateInfoKHR.adoc[]
--

[open,refpage='VkVideoDecodeH265SessionParametersAddInfoKHR',desc='Structure specifies H.265 decoder parameter set information',type='structs']
--
The sname:VkVideoDecodeH265SessionParametersAddInfoKHR structure is defined
as:

include::{generated}/api/structs/VkVideoDecodeH265SessionParametersAddInfoKHR.adoc[]

  * pname:sType is a elink:VkStructureType value identifying this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:stdVPSCount is the number of elements in the pname:pStdVPSs array.
  * pname:pStdVPSs is a pointer to an array of
    code:StdVideoH265VideoParameterSet structures describing the
    <<decode-h265-vps,H.265 VPS>> entries to add.
  * pname:stdSPSCount is the number of elements in the pname:pStdSPSs array.
  * pname:pStdSPSs is a pointer to an array of
    code:StdVideoH265SequenceParameterSet structures describing the
    <<decode-h265-sps,H.265 SPS>> entries to add.
  * pname:stdPPSCount is the number of elements in the pname:pStdPPSs array.
  * pname:pStdPPSs is a pointer to an array of
    code:StdVideoH265PictureParameterSet structures describing the
    <<decode-h265-pps,H.265 PPS>> entries to add.

This structure can: be specified in the following places:

  * In the pname:pParametersAddInfo member of the
    slink:VkVideoDecodeH265SessionParametersCreateInfoKHR structure
    specified in the pname:pNext chain of
    slink:VkVideoSessionParametersCreateInfoKHR used to create a
    <<video-session-parameters,video session parameters>> object.
    In this case, if the video codec operation the video session parameters
    object is created with is
    ename:VK_VIDEO_CODEC_OPERATION_DECODE_H265_BIT_KHR, then it defines the
    set of initial parameters to add to the created object (see
    <<creating-video-session-parameters,Creating Video Session
    Parameters>>).
  * In the pname:pNext chain of slink:VkVideoSessionParametersUpdateInfoKHR.
    In this case, if the video codec operation the
    <<video-session-parameters,video session parameters>> object to be
    updated was created with is
    ename:VK_VIDEO_CODEC_OPERATION_DECODE_H265_BIT_KHR, then it defines the
    set of parameters to add to it (see
    <<video-session-parameters-update,Updating Video Session Parameters>>).

.Valid Usage
****
  * [[VUID-VkVideoDecodeH265SessionParametersAddInfoKHR-None-04833]]
    The pname:vps_video_parameter_set_id member of each
    code:StdVideoH265VideoParameterSet structure specified in the elements
    of pname:pStdVPSs must: be unique within pname:pStdVPSs
  * [[VUID-VkVideoDecodeH265SessionParametersAddInfoKHR-None-04834]]
    The pair constructed from the pname:sps_video_parameter_set_id and
    pname:sps_seq_parameter_set_id members of each
    code:StdVideoH265SequenceParameterSet structure specified in the
    elements of pname:pStdSPSs must: be unique within pname:pStdSPSs
  * [[VUID-VkVideoDecodeH265SessionParametersAddInfoKHR-None-04835]]
    The triplet constructed from the pname:sps_video_parameter_set_id,
    pname:pps_seq_parameter_set_id, and pname:pps_pic_parameter_set_id
    members of each code:StdVideoH265PictureParameterSet structure specified
    in the elements of pname:pStdPPSs must: be unique within pname:pStdPPSs
****

include::{generated}/validity/structs/VkVideoDecodeH265SessionParametersAddInfoKHR.adoc[]
--


=== H.265 Decoding Parameters

[open,refpage='VkVideoDecodeH265PictureInfoKHR',desc='Structure specifies H.265 picture information when decoding a frame',type='structs']
--
The sname:VkVideoDecodeH265PictureInfoKHR structure is defined as:

include::{generated}/api/structs/VkVideoDecodeH265PictureInfoKHR.adoc[]

  * pname:sType is a elink:VkStructureType value identifying this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:pStdPictureInfo is a pointer to a
    code:StdVideoDecodeH265PictureInfo structure specifying
    <<decode-h265-picture-info,H.265 picture information>>.
  * pname:sliceSegmentCount is the number of elements in
    pname:pSliceSegmentOffsets.
  * pname:pSliceSegmentOffsets is a pointer to an array of
    pname:sliceSegmentCount offsets specifying the start offset of the slice
    segments of the picture within the video bitstream buffer range
    specified in slink:VkVideoDecodeInfoKHR.

This structure is specified in the pname:pNext chain of the
slink:VkVideoDecodeInfoKHR structure passed to flink:vkCmdDecodeVideoKHR to
specify the codec-specific picture information for an <<decode-h265,H.265
decode operation>>.

[[decode-h265-output-picture-info]]
Decode Output Picture Information::

When this structure is specified in the pname:pNext chain of the
slink:VkVideoDecodeInfoKHR structure passed to flink:vkCmdDecodeVideoKHR,
the information related to the <<decode-output-picture-info,decode output
picture>> is defined as follows:

  * The image subregion used is determined according to the
    <<decode-h265-picture-data-access,H.265 Decode Picture Data Access>>
    section.
  * The decode output picture is associated with the
    <<decode-h265-picture-info,H.265 picture information>> provided in
    pname:pStdPictureInfo.

[[decode-h265-picture-info]]
Std Picture Information::

The members of the code:StdVideoDecodeH265PictureInfo structure pointed to
by pname:pStdPictureInfo are interpreted as follows:

  * code:reserved is used only for padding purposes and is otherwise
    ignored;
  * code:flags.IrapPicFlag as defined in section 3.73 of the <<itu-t-h265,
    ITU-T H.265 Specification>>;
  * code:flags.IdrPicFlag as defined in section 3.67 of the
    <<itu-t-h265,ITU-T H.265 Specification>>;
  * code:flags.IsReference as defined in section 3.132 of the <<itu-t-h265,
    ITU-T H.265 Specification>>;
  * code:sps_video_parameter_set_id, code:pps_seq_parameter_set_id, and
    code:pps_pic_parameter_set_id are used to identify the active parameter
    sets, as described below;
  * code:PicOrderCntVal as defined in section 8.3.1 of the
    <<itu-t-h265,ITU-T H.265 Specification>>;
  * code:NumBitsForSTRefPicSetInSlice is the number of bits used in
    `st_ref_pic_set` when `short_term_ref_pic_set_sps_flag` is `0`, or `0`
    otherwise, as defined in sections 7.4.7 and 7.4.8 of the <<itu-t-h265,
    ITU-T H.265 Specification>>;
  * code:NumDeltaPocsOfRefRpsIdx is the value of `NumDeltaPocs[RefRpsIdx]`
    when `short_term_ref_pic_set_sps_flag` is `1`, or `0` otherwise, as
    defined in sections 7.4.7 and 7.4.8 of the <<itu-t-h265,ITU-T H.265
    Specification>>;
  * code:RefPicSetStCurrBefore, code:RefPicSetStCurrAfter, and
    code:RefPicSetLtCurr are interpreted as defined in section 8.3.2 of the
    <<itu-t-h265,ITU-T H.265 Specification>> where each element of these
    arrays either identifies an
    <<decode-active-reference-picture-info,active reference picture>> using
    its <<dpb-slot,DPB slot>> index or contains the value
    code:STD_VIDEO_H265_NO_REFERENCE_PICTURE to indicate "`no reference
    picture`";
  * all other members are interpreted as defined in section 8.3.2 of the
    <<itu-t-h265,ITU-T H.265 Specification>>.

[[decode-h265-ref-pic-setup]]
Reference picture setup is controlled by the value of
code:StdVideoDecodeH265PictureInfo::pname:flags.IsReference.
If it is set and a <<decode-reconstructed-picture-info,reconstructed
picture>> is specified, then the latter is used as the target of picture
reconstruction to <<dpb-slot-states,activate>> the corresponding
<<dpb-slot,DPB slot>>.
If code:StdVideoDecodeH265PictureInfo::pname:flags.IsReference is not set,
but a <<decode-reconstructed-picture-info,reconstructed picture>> is
specified, then the corresponding picture reference associated with the
<<dpb-slot,DPB slot>> is invalidated, as described in the
<<dpb-slot-states,DPB Slot States>> section.

Active Parameter Sets::

The members of the code:StdVideoDecodeH265PictureInfo structure pointed to
by pname:pStdPictureInfo are used to select the active parameter sets to use
from the bound video session parameters object, as follows:

  * [[decode-h265-active-vps]] The _active VPS_ is the
    <<decode-h265-vps,VPS>> identified by the key specified in
    code:StdVideoDecodeH265PictureInfo::code:sps_video_parameter_set_id.
  * [[decode-h265-active-sps]] The _active SPS_ is the
    <<decode-h265-sps,SPS>> identified by the key specified by the pair
    constructed from
    code:StdVideoDecodeH265PictureInfo::code:sps_video_parameter_set_id and
    code:StdVideoDecodeH265PictureInfo::code:pps_seq_parameter_set_id.
  * [[decode-h265-active-pps]] The _active PPS_ is the
    <<decode-h265-pps,PPS>> identified by the key specified by the triplet
    constructed from
    code:StdVideoDecodeH265PictureInfo::code:sps_video_parameter_set_id,
    code:StdVideoDecodeH265PictureInfo::code:pps_seq_parameter_set_id, and
    code:StdVideoDecodeH265PictureInfo::code:pps_pic_parameter_set_id.

include::{generated}/validity/structs/VkVideoDecodeH265PictureInfoKHR.adoc[]
--

[open,refpage='VkVideoDecodeH265DpbSlotInfoKHR',desc='Structure specifies H.265 DPB information when decoding a frame',type='structs']
--
The sname:VkVideoDecodeH265DpbSlotInfoKHR structure is defined as:

include::{generated}/api/structs/VkVideoDecodeH265DpbSlotInfoKHR.adoc[]

  * pname:sType is a elink:VkStructureType value identifying this structure.
  * pname:pNext is `NULL` or a pointer to a structure extending this
    structure.
  * pname:pStdReferenceInfo is a pointer to a
    code:StdVideoDecodeH265ReferenceInfo structure specifying reference
    picture information described in section 8.3 of the <<itu-t-h265,ITU-T
    H.265 Specification>>.

This structure is specified in the pname:pNext chain of
slink:VkVideoDecodeInfoKHR::pname:pSetupReferenceSlot, if not `NULL`, and
the pname:pNext chain of the elements of
slink:VkVideoDecodeInfoKHR::pname:pReferenceSlots to specify the
codec-specific reference picture information for an <<decode-h265,H.265
decode operation>>.

[[decode-h265-active-reference-picture-info]]
Active Reference Picture Information::

When this structure is specified in the pname:pNext chain of the elements of
slink:VkVideoDecodeInfoKHR::pname:pReferenceSlots, one element is added to
the list of <<decode-active-reference-picture-info,active reference
pictures>> used by the video decode operation for each element of
slink:VkVideoDecodeInfoKHR::pname:pReferenceSlots as follows:

  * The image subregion used is determined according to the
    <<decode-h265-picture-data-access,H.265 Decode Picture Data Access>>
    section.
  * The reference picture is associated with the <<dpb-slot,DPB slot>> index
    specified in the pname:slotIndex member of the corresponding element of
    slink:VkVideoDecodeInfoKHR::pname:pReferenceSlots.
  * The reference picture is associated with the
    <<decode-h265-reference-info,H.265 reference information>> provided in
    pname:pStdReferenceInfo.

[[decode-h265-reconstructed-picture-info]]
Reconstructed Picture Information::

When this structure is specified in the pname:pNext chain of
slink:VkVideoDecodeInfoKHR::pname:pSetupReferenceSlot, the information
related to the <<decode-reconstructed-picture-info,reconstructed picture>>
is defined as follows:

  * The image subregion used is determined according to the
    <<decode-h265-picture-data-access,H.265 Decode Picture Data Access>>
    section.
  * If <<decode-h265-ref-pic-setup,reference picture setup>> is requested,
    then the reconstructed picture is used to <<dpb-slot-states,activate>>
    the <<dpb-slot,DPB slot>> with the index specified in
    slink:VkVideoDecodeInfoKHR::pname:pSetupReferenceSlot->slotIndex.
  * The reconstructed picture is associated with the
    <<decode-h265-reference-info,H.265 reference information>> provided in
    pname:pStdReferenceInfo.

[[decode-h265-reference-info]]
Std Reference Information::

The members of the code:StdVideoDecodeH265ReferenceInfo structure pointed to
by pname:pStdReferenceInfo are interpreted as follows:

  * code:flags.used_for_long_term_reference is used to indicate whether the
    picture is marked as "`used for long-term reference`" as defined in
    section 8.3.2 of the <<itu-t-h265,ITU-T H.265 Specification>>;
  * code:flags.unused_for_reference is used to indicate whether the picture
    is marked as "`unused for reference`" as defined in section 8.3.2 of the
    <<itu-t-h265,ITU-T H.265 Specification>>;
  * all other members are interpreted as defined in section 8.3 of the
    <<itu-t-h265,ITU-T H.265 Specification>>.

include::{generated}/validity/structs/VkVideoDecodeH265DpbSlotInfoKHR.adoc[]
--


[[decode-h265-requirements]]
=== H.265 Decode Requirements

This section describes the required: H.265 decoding capabilities for
physical devices that have at least one queue family that supports the video
codec operation ename:VK_VIDEO_CODEC_OPERATION_DECODE_H265_BIT_KHR, as
returned by flink:vkGetPhysicalDeviceQueueFamilyProperties2 in
slink:VkQueueFamilyVideoPropertiesKHR::pname:videoCodecOperations.

.Required <<video-std-header-version,Video Std Header Versions>>
[options="header"]
|====
| Video Std Header Name | Version
| `vulkan_video_codec_h265std_decode` | 1.0.0
|====

ifdef::VK_KHR_video_maintenance1[]
.Required Video Capabilities
[width="100%",cols="<35,<14,<11",options="header"]
|====
| Video Capability | Requirement | Requirement Type^1^
| **slink:VkVideoCapabilitiesKHR** | |
| pname:flags | - | min
| pname:minBitstreamBufferOffsetAlignment | 4096 | max
| pname:minBitstreamBufferSizeAlignment | 4096 | max
| pname:pictureAccessGranularity | (64,64) | max
| pname:minCodedExtent | - | max
| pname:maxCodedExtent | - | min
| pname:maxDpbSlots | 0 | min
| pname:maxActiveReferencePictures | 0 | min
| **slink:VkVideoDecodeCapabilitiesKHR** | |
| pname:flags | ename:VK_VIDEO_DECODE_CAPABILITY_DPB_AND_OUTPUT_COINCIDE_BIT_KHR or
                ename:VK_VIDEO_DECODE_CAPABILITY_DPB_AND_OUTPUT_DISTINCT_BIT_KHR | min
| **slink:VkVideoDecodeH265CapabilitiesKHR** | |
| pname:maxLevelIdc | code:STD_VIDEO_H265_LEVEL_IDC_1_0 | min
|====

1::
    The *Requirement Type* column specifies the requirement is either the
    minimum value all implementations must: support, the maximum value all
    implementations must: support, or the exact value all implementations
    must: support.
    For bitmasks a minimum value is the least bits all implementations must:
    set, but they may: have additional bits set beyond this minimum.
endif::VK_KHR_video_maintenance1[]