How to implement a tensorrt plugin for "Unique" op?

[BobLiu20]

I want to implement a plug-in for the operator Unique. But I don’t know how to determine its output dimension, because it cannot be determined directly based on the input (must be determined after calculation? )

nvinfer1::DataType UniquePlugin::getOutputDataType(int index, const nvinfer1::DataType* inputTypes, int nbInputs) const
    noexcept
{
    ?????????????
}

Numpy "Unuqie": https://numpy.org/doc/stable/reference/generated/numpy.unique.html

Any idea to implement it?

[zerollzeng]

Currently we don't support data dependent plugin. @samurdhikaru for viz.

[ttyio]

closing as duplicate with #3521, we need DDS plugin support.