text: #!/usr/bin/env bash
  # Copyright 2015  Johns Hopkins University (author: Vijayaditya Peddinti)
  # Apache 2.0
  # This script downloads the impulse responses and noise files from the
  # Reverb2014 challenge
  # and converts them to wav files with the required sampling rate
  #==============================================
  
  download=true
  sampling_rate=8k
  output_bit=16
  DBname=RVB2014
  file_splitter=  #script to generate job scripts given the command file
  
  . ./cmd.sh
  . ./path.sh
  . ./utils/parse_options.sh
  
  if [ $# != 3 ]; then
    echo "Usage: "
    echo "  $0 [options] <rir-home> <output-dir> <log-dir>"
    echo "e.g.:"
    echo " $0  --download true db/RIR_databases/ data/impulses_noises exp/make_reverb/log"
    exit 1;
  fi
  
  RIR_home=$1
  output_dir=$2
  log_dir=$3
  
  if [ "$download" = true ]; then
    mkdir -p $RIR_home
    (cd $RIR_home;
    rm -rf reverb_tools*.tgz
    wget http://reverb2014.dereverberation.com/tools/reverb_tools_for_Generate_mcTrainData.tgz || exit 1;
    tar -zxvf reverb_tools_for_Generate_mcTrainData.tgz
    wget http://reverb2014.dereverberation.com/tools/reverb_tools_for_Generate_SimData.tgz || exit 1;
    tar -zxvf reverb_tools_for_Generate_SimData.tgz >/dev/null
    )
  fi
  
  Reverb2014_home1=$RIR_home/reverb_tools_for_Generate_mcTrainData
  Reverb2014_home2=$RIR_home/reverb_tools_for_Generate_SimData
  
  # Reverb2014 RIRs and noise
  #--------------------------
  # data is stored as multi-channel wav-files
  
  command_file=$log_dir/${DBname}_read_rir_noise.sh
  echo "">$command_file
  # Simdata for training
  #--------------------
  type_num=1
  data_files=( $(find $Reverb2014_home1/RIR -name '*.wav' -type f -print || exit -1) )
  files_done=0
  total_files=$(echo ${data_files[@]}|wc -w)
  echo "" > $log_dir/${DBname}_type${type_num}.rir.list
  echo "Found $total_files impulse responses in ${Reverb2014_home1}/RIR."
  for data_file in ${data_files[@]}; do
    output_file_name=${DBname}_type${type_num}_`basename $data_file | tr '[:upper:]' '[:lower:]'` 
    echo "sox -t wav $data_file -t wav -r $sampling_rate -e signed-integer -b $output_bit ${output_dir}/${output_file_name}" >> $command_file
    echo ${output_dir}/${output_file_name} >>  $log_dir/${DBname}_type${type_num}.rir.list
    files_done=$((files_done + 1))
  done
  
  data_files=( $(find $Reverb2014_home1/NOISE -name '*.wav' -type f -print || exit -1) )
  files_done=0
  total_files=$(echo ${data_files[@]}|wc -w)
  echo "" > $log_dir/${DBname}_type${type_num}.noise.list
  echo "Found $total_files noises in ${Reverb2014_home1}/NOISE."
  for data_file in ${data_files[@]}; do
    output_file_name=${DBname}_type${type_num}_`basename $data_file| tr '[:upper:]' '[:lower:]'`
    echo "sox -t wav $data_file -t wav -r $sampling_rate -e signed-integer -b $output_bit ${output_dir}/${output_file_name}" >> $command_file
    echo ${output_dir}/${output_file_name} >>  $log_dir/${DBname}_type${type_num}.noise.list
    files_done=$((files_done + 1))
  done
  
  # Simdata for devset
  type_num=$((type_num + 1))
  data_files=( $(find $Reverb2014_home2/RIR -name '*.wav' -type f -print || exit -1) )
  files_done=0
  total_files=$(echo ${data_files[@]}|wc -w)
  echo "" > $log_dir/${DBname}_type${type_num}.rir.list
  echo "Found $total_files impulse responses in ${Reverb2014_home2}/RIR."
  for data_file in ${data_files[@]}; do
    output_file_name=${DBname}_type${type_num}_`basename $data_file| tr '[:upper:]' '[:lower:]'`
    echo "sox -t wav $data_file -t wav -r $sampling_rate -e signed-integer -b $output_bit ${output_dir}/${output_file_name}" >> $command_file
    echo ${output_dir}/${output_file_name} >>  $log_dir/${DBname}_type${type_num}.rir.list
    files_done=$((files_done + 1))
  done
  
  
  data_files=( $(find $Reverb2014_home2/NOISE -name '*.wav' -type f -print || exit -1) )
  files_done=0
  total_files=$(echo ${data_files[@]}|wc -w)
  echo "" > $log_dir/${DBname}_type${type_num}.noise.list
  echo "Found $total_files noises in ${Reverb2014_home2}/NOISE."
  for data_file in ${data_files[@]}; do
    output_file_name=${DBname}_type${type_num}_`basename $data_file | tr '[:upper:]' '[:lower:]'`
    echo "sox -t wav $data_file -t wav -r $sampling_rate -e signed-integer -b $output_bit ${output_dir}/${output_file_name}" >> $command_file
    echo ${output_dir}/${output_file_name} >>  $log_dir/${DBname}_type${type_num}.noise.list
    files_done=$((files_done + 1))
  done
  
  
  
  if [ ! -z "$file_splitter" ]; then
    num_jobs=$($file_splitter $command_file || exit 1)
    job_file=${command_file%.sh}.JOB.sh
    job_log=${command_file%.sh}.JOB.log
  else
    num_jobs=1
    job_file=$command_file
    job_log=${command_file%.sh}.log
  fi
  # execute the commands using the above created array jobs
  time $decode_cmd --max-jobs-run 40 JOB=1:$num_jobs $job_log \
    sh $job_file || exit 1;
  
  # get the Reverb2014 room names to pair the noises and impulse responses 
  for type_num in `seq 1 2`; do
    noise_patterns=( $(ls ${output_dir}/${DBname}_type${type_num}_noise*.wav | xargs -n1 basename | python -c"
  import sys
  for line in sys.stdin:
    name = line.split('${DBname}_type${type_num}_noise_')[1]
    print name.split('_')[0]
    "|sort -u) )
    for noise_pattern in ${noise_patterns[@]}; do
      set_file=$output_dir/info/noise_impulse_${DBname}_$noise_pattern
      echo -n "noise_files =" > ${set_file}
      ls ${output_dir}/${DBname}_type${type_num}_noise*${noise_pattern}*.wav | awk '{ ORS="  "; print;} END{print "\n"}' >> ${set_file}
      echo -n "impulse_files =" >> ${set_file}
      ls ${output_dir}/${DBname}_type${type_num}_rir*${noise_pattern}*.wav | awk '{ ORS="  "; print; } END{print "\n"}' >> ${set_file}
    done
  done
  
  