Description

If a D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAGS value is reported for its respective structure, the driver must write the value after EncodeFrame execution with or without modifications (copy API client input) done by the driver. Otherwise, the driver must copy the values from the associated API Client input when calling EncodeFrame.

Members

CompoundPredictionType

Associated flag is D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_COMPOUND_PREDICTION_MODE.

LoopFilter

Associated flag is D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_LOOP_FILTER.

LoopFilterDelta

Associated flag is D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_LOOP_FILTER_DELTA.

Quantization

Associated flag is D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_QUANTIZATION.

QuantizationDelta

Associated flag is D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_QUANTIZATION_DELTA.

CDEF

Associated flag is D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_CDEF_DATA.

SegmentationConfig

This member operates in different modes depending the segmentation mode selected.

• If D3D12DDI_VIDEO_ENCODER_AV1_PICTURE_CONTROL_0095_FLAG_ENABLE_FRAME_SEGMENTATION_AUTO is on for the current frame, the driver:
  • Calculates and writes SegmentationConfig, which will be used by the API Client to code the segmentation_params() syntax in the frame header.
  • Calculates and writes the read_segment_id() map information directly in the compressed bitstream.
• If D3D12DDI_VIDEO_ENCODER_AV1_PICTURE_CONTROL_FLAG_ENABLE_FRAME_SEGMENTATION_CUSTOM is on for the current frame, the driver:
  • Copy here the SegmentationConfig sent by the API Client in the encode frame parameters for API Client to code the segmentation_params() syntax in the frame header.
  • Copy the read_segment_id() map sent by the API Client in the encode frame parameters directly in the compressed bitstream.
• Otherwise (both segmentation modes are off):
  • The driver should write all zeroes.
  • API Client will write segmentation_enabled = 0 accordingly in the segmentation_params() section of the frame header.

PrimaryRefFrame

Associated flag is D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAG_PRIMARY_REF_FRAME. If the flag was set, the driver controls the selection of the primary reference frame from which the segment id map, CDF, etc are inherited from.

When used together with D3D12DDI_VIDEO_ENCODER_AV1_FEATURE_0095_FLAG_AUTO_SEGMENTATION, allows the driver to force a value other than PRIMARY_REF_NONE when applicable, giving the driver full control of the AV1 syntax: segmentation_update_map, segmentation_temporal_update and segmentation_update_data in segmentation_params().

ReferenceIndices[7]

When the flag is reported, the driver may reorder/remap (but not change the number of references) the ReferenceIndices array, 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 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

See D3D12 AV1 video encoding for more information.

See also

D3D12DDI_VIDEO_ENCODER_AV1_CODEC_CONFIGURATION_SUPPORT_0095

D3D12DDI_VIDEO_ENCODER_AV1_POST_ENCODE_VALUES_0095_FLAGS