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|
#!/bin/sh
# audioconvert_to_wav.sh
#
# 2003.09.14 hof created by hof (Wolfgang Hofer)
#
SCRIPTNAME=`basename "$0"`
LAME=lame
SOX=sox
p_usage()
{
echo ""
echo "usage: $SCRIPTNAME --in audiofile --out wavefile [--resample samplerate_in_HZ]"
echo ""
echo "this script calls the lame for MP3 decoding, and sox for resampling or other conversions"
echo "the resulting output file will be a RIFF wavfile "
echo " "
echo "example1: (keep original samplerate)"
echo " $SCRIPTNAME --in kodachrome.mp3 --out kodachrome.wav"
echo ""
echo " "
echo "example2: (set samplerate)"
echo " $SCRIPTNAME --in kodachrome.mp3 --out kodachrome.wav --resample 44100"
echo ""
echo ""
}
# ----------------
# MAIN
# -----------------
# debug feedback input parameters
echo "$@"
EXPECT_RESAMPLE="NO"
EXPECT_INFILE="NO"
EXPECT_OUTFILE="NO"
IN_FILE=""
OUT_FILE=""
RESAMPLE_RATE=""
for ARG in "$@"
do
if [ $EXPECT_RESAMPLE = "YES" ]
then
RESAMPLE_RATE=$ARG
EXPECT_RESAMPLE="NO"
else
if [ $EXPECT_INFILE = "YES" ]
then
EXPECT_INFILE="NO"
if [ -f "$ARG" ]
then
IN_FILE=$ARG
else
echo "file not found $ARG .. will be ignored"
exit 99
fi
else
if [ $EXPECT_OUTFILE = "YES" ]
then
OUT_FILE=$ARG
EXPECT_OUTFILE="NO"
else
case $ARG in
-resample) EXPECT_RESAMPLE="YES";;
--resample) EXPECT_RESAMPLE="YES";;
-rate) EXPECT_RESAMPLE="YES";;
--rate) EXPECT_RESAMPLE="YES";;
-in) EXPECT_INFILE="YES";;
--in) EXPECT_INFILE="YES";;
-out) EXPECT_OUTFILE="YES";;
--out) EXPECT_OUTFILE="YES";;
-*) p_usage; exit 99;;
*) p_usage; exit 99;;
esac
fi
fi
fi
done
if [ "x$IN_FILE" = "x" ]
then
p_usage
echo
echo "No inputfile was supplied. (please use parmeter --in)"
exit 99
fi;
if [ "x$OUT_FILE" = "x" ]
then
OUT_FILE="${IN_FILE}.out.wav"
echo
echo "No outputfile was supplied. (using $OUT_FILE per default)"
fi;
type $SOX
if [ $? != 0 ]
then
echo "$SOX is not installed (exiting now)"
exit 1
fi
# check where to find lame
type $LAME
if [ $? != 0 ]
then
echo "$LAME is not installed (exiting now)"
exit 1
fi
# ---------------------
# START of CONVERT PART
# ---------------------
rm -f "$OUT_FILE"
if [ -f "$OUT_FILE" ]
then
echo "could not write file: $OUT_FILE (check permissions)"
exit 1
fi
# first try to convert $IN_FILE using sox
# (sox can handle a lot of audio fileformats,
# but not MP3)
if [ "x$RESAMPLE_RATE" = "x" ]
then
$SOX "$IN_FILE" -t wav "$OUT_FILE"
else
$SOX "$IN_FILE" -t wav "$OUT_FILE" rate -h $RESAMPLE_RATE
fi
if [ -s "$OUT_FILE" ]
then
exit 0
fi
if [ "x$RESAMPLE_RATE" = "x" ]
then
# assume $IN_FILE is an MP3 and try to decode to WAV using lame
$LAME --decode "$IN_FILE" "$OUT_FILE"
else
TMP_WAV="${IN_FILE}.tmp_mp3_to.wav"
$LAME --decode "$IN_FILE" "$TMP_WAV"
$SOX "$TMP_WAV" -t wav "$OUT_FILE" rate -h $RESAMPLE_RATE
rm -f "$TMP_WAV"
fi
if [ -s "$OUT_FILE" ]
then
exit 0
fi
echo "could not convert $IN_FILE to 16 bit wav format"
exit 2
|
