add mp3chop.sh

Signed-off-by: Colin McCabe <cmccabe@alumni.cmu.edu>

diff --git a/mp3chop.sh b/mp3chop.sh
new file mode 100755 (executable)
index 0000000..6af88f7
--- /dev/null
+++ b/mp3chop.sh
@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+
+die() {
+    echo $@
+    exit 1
+}
+
+usage() {
+    cat <<EOF
+mp3chop.sh: divide up mp3s into managable pieces.
+
+usage: mp3chop.sh: [options] <mp3 names>
+
+options:
+-h:           show this help message.
+-o [dir]:     output directory to use.
+-s [size]:    segment size to use (default: 5minutes).
+EOF
+}
+
+which mp3splt &> /dev/null || die "you must have mp3splt installed"
+
+segment_size=5.0
+output_dir="./out"
+while getopts  "ho:s:" flag; do
+    case $flag in
+    h)  usage; exit 0;;
+    o)  output_dir=$OPTARG;;
+    s) segment_size=$OPTARG;;
+    *)  echo "getopts error"
+        echo
+        usage
+        exit 1;;
+    esac
+    #echo "$flag" $OPTIND $OPTARG
+done
+
+shift $(( OPTIND-1 ))
+
+mkdir -p "$output_dir" || die "failed to create $output_dir"
+
+for file in "$@"; do
+    absfile="$(readlink -f "${file}")"
+    mkdir -p "${output_dir}/${file}.dir"
+    pushd "${output_dir}/${file}.dir" &>/dev/null \
+        || die "failed to pushd to ${output_dir}/file"
+    ln "$absfile" || die "failed to hardlink ${absfile}"
+    mp3splt -t "${segment_size}" "${file}" \
+        || die "mp3splt failed on file ${file}"
+    rm -f "$file"
+    mv * ..
+    cd ..
+    rmdir "${file}.dir" || die "rmdir ${file}.dir failed"
+    popd &> /dev/null || die "popd failed"
+done
+
+echo "*** SUCCESSFULLY SPLIT ALL ***"