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|
#!/bin/bash
#
# mplayer - jack - jack-stdout - dabplus-enc
# encoder script.
#
# Used to encode webstreams for DAB+, requires
# jackd -d dummy -r 32000
# to be running
printerr() {
echo -e "\033[01;31m$1\033[0m"
}
printmsg() {
echo -e "\033[01;32m$1\033[0m"
}
set -u
# check number of arguments
if [[ "$#" < 3 ]] ; then
echo "Usage $0 url jack-id destination [volume]"
echo "The volume setting is optional"
exit 1
fi
if [[ "$#" > 2 ]] ; then
URL=$1
ID=$2
DST=$3
fi
if [[ "$#" == 4 ]] ; then
VOL=$4
else
VOL=""
fi
BITRATE=80
RATE=32000
encoderalive=0
mplayerpid=0
encoderpid=0
# The trap for Ctrl-C
sigint_trap() {
printerr "Got Ctrl-C, killing mplayer and encoder"
if [[ "$mplayerpid" != "0" ]] ; then
kill -TERM $mplayerpid
sleep 2
kill -KILL $mplayerpid
fi
if [[ "$encoderpid" != "0" ]] ; then
kill -TERM $encoderpid
sleep 2
kill -KILL $encoderpid
fi
printmsg "Goodbye"
exit
}
trap sigint_trap SIGINT
while true
do
mplayer_ok=0
if [[ "$mplayerpid" == "0" ]] ; then
if [[ "$VOL" == "" ]] ; then
mplayer -quiet -af resample=$RATE:0:2 -ao jack:name=$ID $URL &
mplayerpid=$!
else
mplayer -quiet -af resample=$RATE:0:2 -af volume=$VOL -ao jack:name=$ID $URL &
mplayerpid=$!
fi
printmsg "Started mplayer with pid $mplayerpid"
# give some time to mplayer to set up and
# wait until port becomes visible
timeout=10
while [[ "$mplayer_ok" == "0" ]]
do
printmsg "Waiting for mplayer to connect to jack ($timeout)"
sleep 1
mplayer_ok=$(jack_lsp $ID:out_0 | wc -l)
timeout=$(( $timeout - 1))
if [[ "$timeout" == "0" ]] ; then
printerr "mplayer doesn't connect to jack !"
kill $mplayerpid
break
fi
done
else
printmsg "No need to start mplayer: $mplayerpid"
fi
if [[ "$mplayer_ok" == "1" ]] ; then
jack-stdout $ID:out_0 $ID:out_1 | \
dabplus-enc -i /dev/stdin -l \
-b $BITRATE -r $RATE -f raw -a -o $DST &
encoderpid=$!
fi
printmsg "Started encoder with pid $encoderpid"
sleep 5
checkloop=1
while [[ "$checkloop" == "1" ]]
do
sleep 2
kill -s 0 $mplayerpid
if [[ "$?" != "0" ]] ; then
# mplayer died
# we must kill jack-stdout, because we cannot reconnect it
# to a new mplayer, since we do not know the jack-stdout name.
# And it has no cmdline option to set one, Rrrrongntudtjuuu!
if [[ "$encoderpid" != "0" ]] ; then
kill -TERM $encoderpid
fi
checkloop=0
# mark as dead
mplayerpid=0
printerr "Mplayer died"
fi
if [[ "$encoderpid" != "0" ]] ; then
kill -s 0 $encoderpid
if [[ "$?" != "0" ]] ; then
# the encoder died,
# no need to kill the mplayer, we can reconnect to it
checkloop=0
printerr "Encoder died"
fi
fi
done
sleep 5
done
|
