#!/bin/sh -e
# RealAudio RAM to WAV conversion, 2008.04.20.

gain="$1"
url="$2"
if [ -z "$TMPDIR" ]; then
	TMPDIR="/tmp"
fi
myname=`basename $0`
if [ -z "$myname" ]; then
	myname="ram2wav"
fi
tmpfile="$TMPDIR/ram2wav$$.tmp"
if [ -z "$gain" -o -z "$url" ]; then
	cat <<EOF
RealAudio RAM to WAV converter.
Usage: $myname <gain in dB> <url>
If gain is nonzero, then sound is amplified by the specified amount.

Example:
$myname 7 http://somewhere/realaudiofile.ram
EOF
	exit 0
fi

ramname=`basename "$url"`
wavname=`echo $ramname | sed 's/\.ram$/\.wav/'`
if [ "$ramname" = "$wavname" ]; then
	wavname="${ramname}.wav"
fi
if (echo $url | grep '^http:\|^ftp:' >/dev/null); then
	wget "$url" -O "$tmpfile"
	rtspaddr=`grep '^rtsp:' "$tmpfile" | head -1`
	rm -f "$tmpfile"
else
	rtspaddr=`grep '^rtsp:' "$url" | head -1`
fi
echo "mplayer -af volume=$gain -vc null -vo null -ao \"pcm:fast:waveheader:file=$wavname\" \"$rtspaddr\""
exec mplayer -af volume=$gain -vc null -vo null -ao "pcm:fast:waveheader:file=$wavname" "$rtspaddr"