#!/bin/bash
  
  # Copyright 2016  Alibaba Robotics Corp. (author: Xingyu Na)
  # Apache 2.0
  
  # The script creates a new data directory by selecting a specified
  # dimension range of the features in the source directory.
  
  . utils/parse_options.sh
  
  if [ $# != 3 ]; then
    echo "Usage: "
    echo "  $0 <feat-dim-range> <srcdir> <destdir>"
    echo "The script creates a new data directory by selecting a specified"
    echo "dimension range of the features in the source directory."
    echo "e.g.:"
    echo " $0 0:39 data/train_hires_pitch data/train_hires"
    exit 1;
  fi
  
  feat_dim_range=$1
  srcdir=$2
  destdir=$3
  
  if [ "$destdir" == "$srcdir" ]; then
    echo "$0: this script requires <srcdir> and <destdir> to be different."
    exit 1
  fi
  
  if [ ! -f $srcdir/feats.scp ]; then
    echo "$0: no such file $srcdir/feats.scp"
    exit 1;
  fi
  
  mkdir -p $destdir
  utils/copy_data_dir.sh $srcdir $destdir
  
  if [ -f $destdir/cmvn.scp ]; then
    rm $destdir/cmvn.scp
    echo "$0: warning: removing $destdir/cmvn.cp, you will have to regenerate it from the features."
  fi
  
  rm $destdir/feats.scp
  sed 's/$/\[:,'${feat_dim_range}'\]/' $srcdir/feats.scp | \
    utils/data/normalize_data_range.pl > $destdir/feats.scp
  
  [ ! -f $srcdir/text ] && validate_opts="$validate_opts --no-text"
  utils/validate_data_dir.sh $validate_opts $destdir