#!/bin/bash

# CLICK DETECT version 0.16, september 28, 2010, Pieter Suurmond.
# Bash shell script that searches a given directory (recursively) for WAV files;
# Converts them (temporarily) to AIFF files (with SOX) and calls the C-program
# 'click_detect' for all of them, reporting possible clicks and glitches to the
# standard output.

# First print version number of this script:
echo "CD click_detect_wav version 0.16, Pieter Suurmond, sept 28, 2010."
# And print version number of the C sub-program:
./click_detect -v

# Check whether we have 1 argument:
echo ""
if [ $# -ne 1 ]
then
    echo "Please supply a (single) directory as argument!"
    exit
fi

# Filename of temporary textfile created in current directory:
TMP_LIST=_tmp_click_detect_wavs.txt

COUNT_FILES=0
COUNT_CLICKS=0

# Collect all WAV-filenames in a temporary textfile
# (note that we can only run one script at a time!):
echo "Scanning directory $1 ..."
find $1 -iname "*.wav" > $TMP_LIST
# Then put in alphabetic order (in-place conversion):
sort $TMP_LIST -o $TMP_LIST

# Then iterate over all names:
cat $TMP_LIST | while read NAAM; do

((COUNT_FILES++))

# Extract the last component of the pathname and cut the trailing ".wav".
# (${string##substring} = Strip longest match of $substring from front of $string)
T="${NAAM##*/}"
# (${string%substring} = Strip shortest match of $substring from back of $string)
T="${T%.wav}"
# Name of the temporary aiff file:
TAIF=_tmp_"$T".aiff

# Create temporary AIFF-file and search it for clicks / glitches / dropouts.
sox "$NAAM" "$TAIF"
./click_detect "$TAIF"

# Exit code of the last command is stored in '$?'. Report only errors.
if (($?))
then
    ((COUNT_CLICKS++))
    echo "$COUNT_CLICKS: (file $COUNT_FILES) CLICK in $NAAM!"
    echo " "
#   exit
fi

# Remove temporary AIFF-file.
rm "$TAIF"

done

# Remove temporary textfile.
rm $TMP_LIST

echo "Done."