#!/bin/bash
  # Copyright   2018 Hossein Hadian
  #             2018 Ashish Arora
  
  # Apache 2.0
  # This script performs data augmentation.
  
  nj=4
  cmd=run.pl
  feat_dim=40
  verticle_shift=0
  echo "$0 $@"
  
  . ./cmd.sh
  . ./path.sh
  . ./utils/parse_options.sh || exit 1;
  
  srcdir=$1
  outdir=$2
  datadir=$3
  aug_set=aug1
  mkdir -p $datadir/augmentations
  echo "copying $srcdir to $datadir/augmentations/$aug_set, allowed length, creating feats.scp"
  
  for set in $aug_set; do
    image/copy_data_dir.sh --spk-prefix $set- --utt-prefix $set- \
      $srcdir $datadir/augmentations/$set
    cat $srcdir/allowed_lengths.txt > $datadir/augmentations/$set/allowed_lengths.txt
    local/extract_features.sh --nj $nj --cmd "$cmd" --feat-dim $feat_dim \
      --vertical-shift $verticle_shift \
      --augment 'random_shift' $datadir/augmentations/$set
  done
  
  echo " combine original data and data from different augmentations"
  utils/combine_data.sh --extra-files images.scp $outdir $srcdir $datadir/augmentations/$aug_set
  cat $srcdir/allowed_lengths.txt > $outdir/allowed_lengths.txt