code: def run_vocoder(self, c, **kwargs):
      # c = c.transpose([0, 2, 1])  # [B, 80, T]
      f0 = kwargs.get("f0")  # [B, T]
      if f0 is not None and hparams.get("use_nsf"):
          y = self.vocoder.run(
              ["wav_out"],
              {
                  "mel_out": c,
                  "f0": f0,
              },
          )[
              0
          ]  # .reshape([-1])
      else:
          y = self.vocoder.run(
              ["wav_out"],
              {
                  "mel_out": c,
              },
          )[
              0
          ]  # .reshape([-1])
          # [T]
      return y
  
imports: import os
  from collections import deque
  import librosa
  import numpy
  import onnxruntime
  from pypinyin import lazy_pinyin
  from tqdm import tqdm
  from .inference.svs.opencpop.map import cpop_pinyin2ph_func
  from .utils.hparams import hparams
  from .utils.text_encoder import TokenTextEncoder
label_desc: Use image node_id 6 for calling the Infer obj's underlying member method code with example usage: obj.run_vocoder(c) and returns: y