#!/bin/sh
# prerequisites: mp3info, gsed (gnu-sed), flac

/bin/echo -n "Reading files: "
cat ${1} | while IFS= read -r LINE; do
  EXT=`echo ${LINE} | gsed -e 's/.*\.\([A-z]*\)$/\1/'`
  if [ "${EXT}" == "flac" ]; then
     metaflac --show-total-samples --show-sample-rate "${LINE}" | tr '\n' ' ' | awk '{print $1/$2}' >> /tmp/$$.playlength
  else # mp3
     mp3info -p "%S" "${LINE}" >> /tmp/$$.playlength
     echo '' >> /tmp/$$.playlength
  fi
done
echo "Done.  Calculating..."

TOTSECS=0
for value in `cat /tmp/$$.playlength`; do
  TOTSECS=`echo ${TOTSECS} $value | awk '{print $1+$2}'`
done
TOTSECS=`echo ${TOTSECS} | cut -f1 -d'.'`
rm -f /tmp/$$.playlength

DAYS=`expr ${TOTSECS} / 86400`

TOTSECS=`expr ${TOTSECS} % 86400`
HOURS=`expr ${TOTSECS} / 3600`

TOTSECS=`expr ${TOTSECS} % 3600`
MINUTES=`expr ${TOTSECS} / 60`

SECONDS=`expr ${TOTSECS} % 60`

/bin/echo -n "Playing time:"
echo "${DAYS} days, ${HOURS} hours, ${MINUTES} minutes, ${SECONDS} seconds"