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D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAGS enumeration (d3d12umddi.h)

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The D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAGS enumeration specifies which AV1 encoding features the underlying encoder is able to override (partially or totally) the associated AV1 syntax values or honor API Client exact configuration input otherwise.

Syntax

typedef enum D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAGS {
  D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_NONE = 0,
  D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_QUANTIZATION = 0x1,
  D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_QUANTIZATION_DELTA = 0x2,
  D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_LOOP_FILTER = 0x4,
  D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_LOOP_FILTER_DELTA = 0x8,
  D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_CDEF_DATA = 0x10,
  D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_CONTEXT_UPDATE_TILE_ID = 0x20,
  D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_COMPOUND_PREDICTION_MODE = 0x40,
  D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_PRIMARY_REF_FRAME = 0x80,
  D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_REFERENCE_INDICES = 0x100
} ;

Constants

 
D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_NONE
Value: 0
D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_QUANTIZATION
Value: 0x1
Related to D3D12DDI_VIDEO_ENCODER_CODEC_AV1_QUANTIZATION_CONFIG_0095 values. Used to code quantization_params().
D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_QUANTIZATION_DELTA
Value: 0x2
Related to D3D12DDI_VIDEO_ENCODER_CODEC_AV1_QUANTIZATION_DELTA_CONFIG_0095 values. Used to code delta_q_params().
D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_LOOP_FILTER
Value: 0x4
Related to D3D12DDI_VIDEO_ENCODER_CODEC_AV1_LOOP_FILTER_CONFIG_0095 values. Used to code AV1 syntax loop_filter_params().
D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_LOOP_FILTER_DELTA
Value: 0x8
Related to D3D12DDI_VIDEO_ENCODER_CODEC_AV1_LOOP_FILTER_DELTA_CONFIG_0095 values. Used to code AV1 syntax delta_lf_params().
D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_CDEF_DATA
Value: 0x10
Related to D3D12DDI_VIDEO_ENCODER_AV1_CDEF_CONFIG_0095 values. Used to code AV1 syntax cdef_params().
D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_CONTEXT_UPDATE_TILE_ID
Value: 0x20
Related to the ContextUpdateTileId member in D3D12DDI_VIDEO_ENCODER_AV1_PICTURE_CONTROL_SUBREGIONS_LAYOUT_DATA_TILES_0095. Used to code AV1 element syntax context_update_tile_id in tile_info().
D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_COMPOUND_PREDICTION_MODE
Value: 0x40
Related to D3D12DDI_VIDEO_ENCODER_AV1_COMP_PREDICTION_TYPE_0095 values.

When API Client selects D3D12DDI_VIDEO_ENCODER_AV1_COMP_PREDICTION_TYPE_COMPOUND_REFERENCE and this flag is set, the driver will return D3D12DDI_VIDEO_ENCODER_AV1_COMP_PREDICTION_TYPE in post encode values. The returned value must be used to code reference_select = 0 (SINGLE) or reference_select = 1 (COMPOUND) syntax accordingly.

When API Client selects D3D12DDI_VIDEO_ENCODER_AV1_COMP_PREDICTION_TYPE_COMPOUND_SINGLE and this flag is set, the driver will return D3D12DDI_VIDEO_ENCODER_AV1_COMP_PREDICTION_TYPE_COMPOUND_SINGLE and reference_select must be coded as 0 (SINGLE).
D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_PRIMARY_REF_FRAME
Value: 0x80
Related to the PrimaryRefFrame element in D3D12DDI_VIDEO_ENCODER_AV1_PICTURE_CONTROL_CODEC_DATA_0095. Used to code AV1 element syntax primary_ref_frame in uncompressed_header().
D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_REFERENCE_INDICES
Value: 0x100
When the flag is reported by the driver, the driver may reorder/remap (but not change the number of references) of the D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095.ReferenceIndices array output, based on the user input D3D12DDI_VIDEO_ENCODER_AV1_PICTURE_CONTROL_CODEC_DATA_0095.ReferenceIndices. Otherwise, the driver must copy each array entry of this post encode output parameter as-is from D3D12DDI_VIDEO_ENCODER_AV1_PICTURE_CONTROL_CODEC_DATA_0095.ReferenceIndices.

API Client will write the picture header ref_frame_idx AV1 syntax from this output parameter.

Remarks

When the bitflag is SET for a given feature, the driver receives the related API Client input and is able to override all or certain parameters of the associated structure with the given reported flag, which will then write back in D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095 with the final values for the API Client to repack the AV1 headers accordingly. API Client can compare this to the associated input structure to determine the driver changes, if any.

When the bitflag is NOT SET for a given feature, the driver honors the related API Client input exactly and copies the input values in D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095. In this way, the client can always copy the post encode values to pack the headers directly.

See D3D12 AV1 video encoding for more information.

Requirements

Requirement Value
Minimum supported client Windows 11, version 24H2 (WDDM 3.2)
Header d3d12umddi.h

See also

D3D12DDI_VIDEO_ENCODER_AV1_CODEC_CONFIGURATION_SUPPORT_0095