code: def mu_law(x, mu=255, int8=False):
      """A TF implementation of Mu-Law encoding.
  
      Args:
        x: The audio samples to encode.
        mu: The Mu to use in our Mu-Law.
        int8: Use int8 encoding.
  
      Returns:
        out: The Mu-Law encoded int8 data.
      """
      out = tf.sign(x) * tf.log(1 + mu * tf.abs(x)) / np.log(1 + mu)
      out = tf.floor(out * 128)
      if int8:
          out = tf.cast(out, tf.int8)
      return out
  
imports: import importlib
  import os
  import librosa
  import numpy
  import tensorflow.compat.v1
  import tf_slim
label_desc: Use image node_id 4 for calling a global function with example usage: mu_law(x, mu, int8) and returns: out