// d3d12umddi.h

typedef enum D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAGS_0083_0 {
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_NONE,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_BFRAME_LTR_COMBINED_SUPPORT,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_INTRA_SLICE_CONSTRAINED_ENCODING_SUPPORT,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_CONSTRAINED_INTRAPREDICTION_SUPPORT,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_SAO_FILTER_SUPPORT,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_ASYMETRIC_MOTION_PARTITION_SUPPORT,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_ASYMETRIC_MOTION_PARTITION_REQUIRED,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_TRANSFORM_SKIP_SUPPORT,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_DISABLING_LOOP_FILTER_ACROSS_SLICES_SUPPORT,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_P_FRAMES_IMPLEMENTED_AS_LOW_DELAY_B_FRAMES,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0099_0_NUM_REF_IDX_ACTIVE_OVERRIDE_FLAG_SLICE_SUPPORT
} ;
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Windows Driver Kit DDI reference (ne-d3d12umddi-d3d12ddi_video_encoder_codec_configuration_support_hevc_flags_0083_0)

Description

The D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAGS_0083_0 enumeration specifies configuration support flags for HEVC encoding.

Constants

`D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_NONE`

No flags.

`D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_BFRAME_LTR_COMBINED_SUPPORT`

Indicates support for use of B frames and long term references frames simultaneously.

`D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_INTRA_SLICE_CONSTRAINED_ENCODING_SUPPORT`

Indicates support for slice-constrained encoding, in which every slice in a frame is encoded independently from other slices in the same frame. This mode restricts the motion vector search range to the region box of the current slice; that is, motion vectors outside the slice boundary cannot be used.

`D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_CONSTRAINED_INTRAPREDICTION_SUPPORT`

Indicates support for constrained intra-prediction that, if activated, will force the encoding of each intra-coded block with residual data only from other intra-coded blocks (and not from inter-coded blocks). This flag refers to constrained_intra_pred_flag in the picture parameter set (PPS).

`D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_SAO_FILTER_SUPPORT`

Indicates support for sample adaptive offset.

`D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_ASYMETRIC_MOTION_PARTITION_SUPPORT`

Indicates support for asymmetric motion partition.

`D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_ASYMETRIC_MOTION_PARTITION_REQUIRED`

Indicates that asymmetric motion partition must always be enabled. If this flag is set, D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_ASYMETRIC_MOTION_PARTITION_SUPPORT must also be set.

`D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_TRANSFORM_SKIP_SUPPORT`

Indicates support for transform skip.

`D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_DISABLING_LOOP_FILTER_ACROSS_SLICES_SUPPORT`

Indicates support for disabling loop filter across slices.

`D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0083_0_P_FRAMES_IMPLEMENTED_AS_LOW_DELAY_B_FRAMES`

Indicates that frames being encoded with type D3D12DDI_VIDEO_ENCODER_FRAME_TYPE_HEVC_0080_P_FRAME will be written as low delay B-frames in the compressed bit stream. If this flag is not set, P frames will be written in the compressed bit stream.

[!NOTE]

When operating in this mode, it is the caller's responsibility to code the correct frame type in _AUD_NUT_ and other parts of the HEVC bit stream, taking into account that P frames will be treated as generalized B frames with only references to past frames in picture order count (POC) order.

`D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAG_0099_0_NUM_REF_IDX_ACTIVE_OVERRIDE_FLAG_SLICE_SUPPORT`

Indicates that the encoder supports overriding the number of active reference indices at the slice level. This allows for more fine-grained control of reference frames used for prediction on a per-slice basis. Added in Windows 11, version 24H2 (WDDM 3.2).

Remarks

See D3D12 video encoding for general information.

D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_HEVC_FLAGS_0083_0 - NtDoc