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contrib: add an example monitoring volume changes #146

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33 changes: 33 additions & 0 deletions contrib/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -75,3 +75,36 @@ light -U 5 && light -G | cut -d'.' -f1 > $WOBSOCK
brightnessctl set 5%- | sed -En 's/.*\(([0-9]+)%\).*/\1/p' > $WOBSOCK
brightnessctl set +5% | sed -En 's/.*\(([0-9]+)%\).*/\1/p' > $WOBSOCK
```

### Print the volume as it changes

Instead of configuring a key mapping to show the volume, it's possible to
show the current volume automatically any time it changes.

To do so, save the following script as `volume.sh`, and then execute `volume.sh
| wob`:

```sh
#!/bin/sh
# Print the volume followed by newline each time it changes.

get_volume() {
pactl get-sink-volume "@DEFAULT_SINK@" | \
awk -F'/' '{print $2}' | awk '{print $1}' | tr -d '%'
}

last_volume=$(get_volume)
echo "$last_volume"

pactl subscribe | while read -r event; do
case "$event" in
*" on sink #"*)
current_volume=$(get_volume)
if [ "$current_volume" != "$last_volume" ]; then
echo "$current_volume"
last_volume="$current_volume"
fi
;;
esac
done
```