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D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAGS_0080 enumeration (d3d12umddi.h)

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The D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAGS_0080 enumeration lists the possible set of enabled features for an H.264 codec.

Syntax

typedef enum D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAGS_0080 {
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAG_NONE_0080,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAG_USE_CONSTRAINED_INTRAPREDICTION_0080,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAG_USE_ADAPTIVE_8x8_TRANSFORM_0080,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAG_ENABLE_CABAC_ENCODING_0080,
  D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAG_ALLOW_REQUEST_INTRA_CONSTRAINED_SLICES_0080
} ;

Constants

 
D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAG_NONE_0080
No flags are specified.
D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAG_USE_CONSTRAINED_INTRAPREDICTION_0080
When set, this flag forces the encoding of each intra-coded block with residual data only from other intra-coded blocks in the frame (and not from inter-coded blocks, for example). Check the D3D12_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_FLAGS_H264_CONSTRAINED_INTRAPREDICTION_SUPPORT flag for support. This flag refers to constrained_intra_pred_flag in the H.264 Picture Parameter Set (PPS).
D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAG_USE_ADAPTIVE_8x8_TRANSFORM_0080
When set, this flag enables the usage of adaptive 8x8 transforms. Check the D3D12_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_FLAGS_H264_ADAPTIVE_8x8_TRANSFORM_ENCODING_SUPPORT flag for support.
D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAG_ENABLE_CABAC_ENCODING_0080
When set, this flag enables entropy coding using the context-adaptive binary arithmetic coding (CABAC) algorithm. When this flag is not set, the context-adaptive variable-length coding (CAVLC) algorithm is used. Check the D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_H264_FLAG_0080_CABAC_ENCODING_SUPPORT flag for CABAC support.
D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_FLAG_ALLOW_REQUEST_INTRA_CONSTRAINED_SLICES_0080
When set, the user can request, for each frame with a special flag in the picture control structure, that slices of such a frame be coded independent of each other. This mode restricts the motion vector search range to the region box of the current slice (for example, motion vectors cannot be used outside of the slice boundary).

Remarks

Flags can be combined.

The host (D3D12 lower-level encoding API) sets these configuration flags based on the limits queried at the API level.

See D3D12 video encoding for general information.

Requirements

Requirement Value
Minimum supported client Windows 11 (WDDM 3.0)
Header d3d12umddi.h

See also

D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_H264_0082_0

D3D12DDI_VIDEO_ENCODER_CODEC_CONFIGURATION_SUPPORT_H264_FLAGS_0080