Wav2vec2 ParametrizedConv1d code and dimention

audio
1

for input size [1, 1, 768] , how can we calculate the o/p of the following layers?
and can anyone help to code this block in pytorch (this one belongs to wav2vec2) ?

      (pos_conv_embed): ConvolutionalPositionalEmbedding(
        (conv): ParametrizedConv1d(
          768, 768, kernel_size=(128,), stride=(1,), padding=(64,), groups=16
          (parametrizations): ModuleDict(
            (weight): ParametrizationList(
              (0): _WeightNorm()
            )
          )
        )
      )