61 lines
2.2 KiB
Bash
61 lines
2.2 KiB
Bash
#!/bin/sh
|
|
# This script sets up the audio subsystem to route audio to and from the modem.
|
|
# Called by samsungipcd when the call starts. When the call ends, we receive a
|
|
# newline and terminate ourselves.
|
|
# Note: as a side effect, software on the phone cannot access the microphone
|
|
# during a call.
|
|
|
|
# Put ourselves into a PID namespace. This is an easy and non-racey way to
|
|
# ensure that all child processes get killed on our exit.
|
|
if [ "$$" != 1 ]; then
|
|
unshare -p sh "$0"
|
|
exitcode="$?"
|
|
# Restore MIC1 state to normal. We should be the only entity fiddling
|
|
# with that.
|
|
amixer -D sysdefault cset name='MIC1 MIC1 On' 1
|
|
exit "$exitcode"
|
|
fi
|
|
|
|
# callaudiod has already changed the UCM verb, no need to do it manually
|
|
#alsaucm set _verb 'Voice Call'
|
|
|
|
# In order for sound to be forwarded, there must be applictions that are
|
|
# currently playing and recording audio. To ensure that they exists, we
|
|
# connect to each user's PipeWire and start ones.
|
|
|
|
# Playback
|
|
for i in /run/user/*/; do
|
|
# To avoid vulnerabilities in PulseAudio becoming LPEs, setuid to the
|
|
# user running PipeWire.
|
|
XDG_RUNTIME_DIR="$i" su -c 'aplay /dev/zero' "$(grep "^[^:]*:[^:]*:$(basename "$i"):" /etc/passwd | cut -d : -f 1-1)" &
|
|
done
|
|
|
|
# Same for recording
|
|
for i in /run/user/*/; do
|
|
XDG_RUNTIME_DIR="$i" su -c 'arecord /dev/null' "$(grep "^[^:]*:[^:]*:$(basename "$i"):" /etc/passwd | cut -d : -f 1-1)" &
|
|
done
|
|
|
|
# Microphone switching logic
|
|
for i in /run/user/*/; do
|
|
XDG_RUNTIME_DIR="$i" su -c '
|
|
# Set locale to C to avoid parsing localized command output
|
|
export LANG=C
|
|
# Report microphone mute events
|
|
( echo; pactl subscribe; ) | while read; do pactl get-source-mute @DEFAULT_SOURCE@; done
|
|
' "$(grep "^[^:]*:[^:]*:$(basename "$i"):" /etc/passwd | cut -d : -f 1-1)" &
|
|
done | while read line; do
|
|
if [[ "$line" == "Mute: yes" ]]; then
|
|
amixer -D sysdefault cset name='MIC1 MIC1 On' 0
|
|
elif [[ "$line" == "Mute: no" ]]; then
|
|
amixer -D sysdefault cset name='MIC1 MIC1 On' 1
|
|
fi
|
|
done &
|
|
|
|
# Wait for newline from samsungipcd. This means that the call has ended.
|
|
read
|
|
|
|
# No need to clean up, closing the PID namespace will kill all children
|
|
#jobs -p | xargs kill
|
|
|
|
# Again, callaudiod will switch UCM verbs for us
|
|
#alsaucm set _verb 'HiFi'
|