#!/bin/bash
  
  # This script works out the approximate number of frames in a training directory.
  # This is sometimes needed by higher-level scripts
  
  
  if [ -f path.sh ]; then . ./path.sh; fi
  . parse_options.sh || exit 1;
  
  if [ $# -ne 1 ]; then
    (
      echo "Usage: $0 <data-dir>"
      echo "Prints the number of frames of data in the data-dir"
    ) 1>&2
  fi
  
  data=$1
  
  if [ ! -f $data/utt2dur ]; then
    utils/data/get_utt2dur.sh $data 1>&2 || exit 1
  fi
  
  frame_shift=$(utils/data/get_frame_shift.sh $data) || exit 1
  
  awk -v s=$frame_shift '{n += $2} END{printf("%.0f
  ", (n / s))}' <$data/utt2dur