#!/bin/sh

. /etc/rc.config

## by Christian ##
## show in /etc/rc.config ##
# DSL (DSL1000; DSL2000; DSL3000; DSL6000; LAN; WLAN11; WLAN54)
#STREAMDEV_EXTERN_STREAMQUALITY="WLAN11"
# Quality of Mp3 Stream (32bit; 64bit)
#STREAMDEV_EXTERN_AUDIO="64"
# Cache default 4096 (4096; 8192)
#STREAMDEV_EXTERN_CACHE="8192"
# Codec lavc, xvid
#STREAMDEV_EXTERN_CODEC="xvid"
# Frames per second
#STREAMDEV_EXTERN_FPS="15"
# Aspect (4/3; 16/9)
#STREAMDEV_EXTERN_ASPECT="16/9"
# Debug (0;1)
#STREAMDEV_EXTERN_LOG="1"

case "${REMUX_PARAM_QUALITY-$STREAMDEV_EXTERN_STREAMQUALITY}" in
	"DSL1000")
		bitrate=75
		vbitrate=100
		height=104
		;;
	"DSL2000")
		bitrate=85
		vbitrate=128
		height=104
		;;
	"DSL3000")
		bitrate=100
		vbitrate=250
		height=208
		;;
	"DSL6000")
		bitrate=150
		vbitrate=400
		height=320
		;;
	"WLAN11")
		bitrate=350
		vbitrate=768
		height=480
		;;
	"WLAN54")
		bitrate=400
		vbitrate=2048
		height=480
		;;
	"LAN")
		bitrate=600
		vbitrate=4096
		height=600
		;;
	*)
		bitrate=600
		vbitrate=4096
		height=600
		;;
esac
if [ "$STREAMDEV_EXTERN_ASPECT" = "auto" ]; then
	width=$(($height*4/3))
	scale="scale -zoom -xy $width"
else
	width=$(($height*$STREAMDEV_EXTERN_ASPECT))
	scale="scale=$width:$height"
fi


if [ ! -e /usr/bin/$STREAMDEV_EXTERN_TOOL ]; then
	echo -ne "Content-type: text/plain\r\n"
	echo -ne '\r\n'
	echo "'$STREAMDEV_EXTERN_TOOL' missing! Please install the $STREAMDEV_EXTERN_TOOL addon"
	exit
fi

echo -ne 'Content-type: video/mpeg\r\n'
echo -ne '\r\n'

if [ "$STREAMDEV_EXTERN_LOG" = 1 ]; then
	LOG="/var/log/externremux.log"
else
	LOG="/dev/null"
fi

FIFO=/tmp/extremux.$$

mkfifo $FIFO
(trap "rm -f $FIFO; kill -9 \$(ps -ww | grep -v grep | grep $FIFO | cut -d ' ' -f 1)" EXIT HUP INT TERM ABRT; cat $FIFO) &

command="$(grep "^$REMUX_CHANNEL_NAME" /etc/vdr/plugins/streamdev/externremux_cmd.conf 2>/dev/null | sed "s/.*\t//")"
if [ -n "$command" ]; then
	if [ -z "${command##*#transcode*}" ]; then
		eval su mlduser -c \"vlc - $command --intf dummy\" &>$LOG
	else
		eval mencoder - $command -o $FIFO &>$LOG
	fi
else
	if [ "$STREAMDEV_EXTERN_TOOL" = "vlc" ]; then
		STREAMDEV_EXTERN_CODEC=$(test "$STREAMDEV_EXTERN_CODEC" = "h264" && echo "h264" || echo "mpgv")
		su mlduser -c "vlc - --http-caching='$STREAMDEV_EXTERN_CACHE' --sout='#transcode{vcodec=$STREAMDEV_EXTERN_CODEC,vb=$vbitrate,acodec=mpga,ab=$STREAMDEV_EXTERN_AUDIO,width=$width,height=$height}:duplicate{dst=std{access=file,mux=ps,dst=$FIFO}' --intf dummy" &>$LOG
	else
		if [ "$STREAMDEV_EXTERN_CODEC" = "h264" ]; then
			exec mencoder - -cache $STREAMDEV_EXTERN_CACHE -ovc x264 -srate 22050 -x264encopts bitrate=$bitrate:vbv_maxrate=$vbitrate:vbv_bufsize=300:ratetol=0.1:threads=3 -oac mp3lame -lameopts cbr:br=$STREAMDEV_EXTERN_AUDIO:q=2:mode=3 -vf pp=ci,$scale -ofps $STREAMDEV_EXTERN_FPS -o $FIFO &>$LOG
		else
			exec mencoder - -cache $STREAMDEV_EXTERN_CACHE -ovc $STREAMDEV_EXTERN_CODEC -xvidencopts bitrate=$bitrate -lavcopts vcodec=mpeg4:vbitrate=$vbitrate:vhq:keyint=250 -oac mp3lame -lameopts cbr:br=$STREAMDEV_EXTERN_AUDIO -vf $scale -ofps $STREAMDEV_EXTERN_FPS -o $FIFO &>$LOG
		fi
	fi
fi

rm -f $FIFO