A few more changes to the script:
-- switched from json to regular cli on 9090, simpler to parse, at least
for this
-- changed back to using the -t latency in usec argument for alsaloop
-- changed the bt sync logic to get the elapsed track time and use that
as the basis for the latency adjustment, that way you can go up and down
instead of just up, but no lower than the starting -t latency, so pause
the track, set the time slider and power squeezelite on and off to set
the new latency setting for the onboard cards
Code:
--------------------
#!/bin/sh
tcard=300000
tbt=375000
btplayer="bluetooth-player"
btspeaker="bluetooth-speaker"
btsync="bluetooth-sync"
rssi="-60"
__start_cards()
{
if [ $1 ]
then
tcard=$1
fi
for card in $(cut -d' ' -f3 /proc/asound/cards | tr -d '[' | grep -v Loopback
| tr -s '\n')
do
for i in $(seq 0 7)
do
if ! ps | grep -q "[L]oopback,1,${i}"
then
break
fi
done
alsaloop -d -C hw:Loopback,1,${i} -P "hw:${card},0" -S5 -t ${tcard}
done
}
__watch_bluetooth()
{
while :
do
if inotifywait -qq -r -e create /dev/input/
then
pdevs=$(bluetoothctl paired-devices | cut -d' ' -f2)
for pdev in ${pdevs}
do
if bluetoothctl info "${pdev}" | tr -d '\n' | grep -Eq 'Connected: yes.*Audio
Sink'
then
if ! ps | grep "[D]EV=${pdev}"
then
for i in $(seq 0 7)
do
if ! ps | grep -q "[L]oopback,1,${i}"
then
break
fi
done
alsaloop -d -C hw:Loopback,1,${i} -P
bluealsa:SRV=org.bluealsa,DEV=${pdev},PROFILE=a2dp -S5 -t ${tbt}
fi
fi
done
fi
done
}
if [ "$1" = "boot" ]
then
bluetoothctl discoverable off
bluealsa-aplay 00:00:00:00:00:00 &
__start_cards
__watch_bluetooth
elif [ $1 -eq 0 ]
then
exit
fi
uptime=$(cut -d'.' -f1 /proc/uptime)
if [ ${uptime} -le 60 ]
then
exit
fi
lmsip=$(netstat -tn | grep 3483 | tr -s ' ' | cut -d' ' -f5 | cut -d ':' -f1)
iface=$(arp -an | grep ${lmsip} | tr -s ' ' | cut -d' ' -f7)
read mac < /sys/class/net/${iface}/address
response=$( (echo -e "${mac} title ?"; sleep .2) | nc ${lmsip} 9090 | cut -d'
' -f3 )
i=0
case "${response}" in
"${btplayer}" )
bluetoothctl discoverable on
prepair=$(bluetoothctl paired-devices | cut -d' ' -f2)
while [ $i -le 30 ]
do
sleep 2
newpair=$(bluetoothctl paired-devices | cut -d' ' -f2)
newdev=$(printf "${prepair}\n${newpair}\n" | sort | uniq -u)
if [ "${newdev}" ]
then
bluetoothctl trust ${newdev}
bluetoothctl connect ${newdev}
break
fi
i=$(( $i +1 ))
done
bluetoothctl discoverable off ;;
"${btspeaker}" )
prescan=$(bluetoothctl devices)
while [ $i -le 6 ]
do
(printf "scan.rssi ${rssi}\nscan on\n"; sleep 5) | bluetoothctl
sleep .2
newscan=$(bluetoothctl devices)
newdev=$(printf "${prescan}\n${newscan}\n" | sort | uniq -u | cut -d' ' -f2)
if [ "${newdev}" ]
then
bluetoothctl pair ${newdev}
bluetoothctl trust ${newdev}
bluetoothctl connect ${newdev}
break
fi
i=$(( $i +1 ))
done ;;
"${btsync}" )
response=$( (echo -e "${mac} time ?"; sleep .2) | nc ${lmsip} 9090 | cut -d'
' -f3 )
response=${response%.*}
tadd=$(( ${response} * 10000 ))
tcard=$(( ${tcard} + ${tadd} ))
pids=$(pgrep -fa hw:Loopback | grep -v bluealsa | cut -d' ' -f1 | tr '\n' ' ')
kill ${pids}
__start_cards ${tcard} ;;
esac
--------------------
------------------------------------------------------------------------
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