1 files changed, 52 insertions, 0 deletions
diff --git a/bin/rgain.sh b/bin/rgain.sh
new file mode 100755
index 0000000..09d4ac9
--- /dev/null
+++ b/bin/rgain.sh
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+LC_NUMERIC=POSIX; export LC_NUMERIC
+
+MP3GAIN=`which mp3gain`
+if [[ $? != 0 ]]; then
+    echo "mp3gain executable not found." >&2
+    exit 1
+fi
+
+EYED3=`which eyeD3`
+if [[ $? != 0 ]]; then
+    echo "eyeD3 executable not found." >&2
+    exit 1
+fi
+
+if [[ $# > 1 || $# == 1 && $1 != "-f" ]] ; then
+    echo "Usage: `basename $0` [-f]" >&2
+    echo " for ReplayGain'ing all mp3 file into current directory" >&2
+    echo " -f -- force re-ReplayGain'ing for already ReplayGain'ed files" >&2
+    exit 2
+fi
+
+if [[ $# == 0 ]]; then
+    $EYED3 --no-color *.mp3 \
+    | egrep -i '^UserTextFrame: \[Description: replaygain_album_gain\]$' >/dev/null 2>&1
+    if [[ $? == 0 ]]; then
+        echo "Files already ReplayGain'ed." >&2
+        exit 1
+    fi
+fi
+
+$MP3GAIN *.mp3
+
+TMPFILE=`mktemp`
+
+for n in *.mp3; do
+    $MP3GAIN -s c "$n" > $TMPFILE
+    $MP3GAIN -s d "$n"
+    TRACK_GAIN=`awk '/^Recommended "Track" dB / { printf("%+.2f dB", $5)   }' $TMPFILE`
+    ALBUM_GAIN=`awk '/^Recommended "Album" dB / { printf("%+.2f dB", $5)   }' $TMPFILE`
+    TRACK_PEAK=`awk '/^Max PCM /                { printf("%.6f", $7/32768) }' $TMPFILE`
+    ALBUM_PEAK=`awk '/^Max Album PCM /          { printf("%.6f", $8/32768) }' $TMPFILE`
+    $EYED3 \
+        --set-user-text-frame="replaygain_track_gain:$TRACK_GAIN" \
+        --set-user-text-frame="replaygain_track_peak:$TRACK_PEAK" \
+        --set-user-text-frame="replaygain_album_gain:$ALBUM_GAIN" \
+        --set-user-text-frame="replaygain_album_peak:$ALBUM_PEAK" \
+        "$n"
+done
+
+rm -f $TMPFILE