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|
#!/usr/bin/env bash
set -e
# Best-effort script to control volume of the focused application,
# falling back to the default sink.
#
# MODIFIED: Now checks for Spotify and uses 'playerctl' if found.
# MODIFIED: Pactl branch now matches on process binary name, not PID.
USAGE="Usage: $(basename "$0") WINDOW_ID [--up | --down | --set <0-100>]"
CHANGE_PCT="5" # Percent to change
# Get the focused window ID
FOCUSED_WIN_ID="$1"
shift;
ACTION=$1
ARGUMENT=$2
# --- Check if the window is Spotify ---
IS_SPOTIFY=0
if [ -n "$FOCUSED_WIN_ID" ] && [ "$FOCUSED_WIN_ID" != "0" ]; then
# xprop output is: WM_CLASS(STRING) = "spotify", "Spotify"
# We check for "spotify" case-insensitive
if xprop -id "$FOCUSED_WIN_ID" WM_CLASS | grep -q -i "spotify"; then
IS_SPOTIFY=1
fi
fi
# --- BRANCH 1: SPOTIFY LOGIC (use playerctl) ---
if [ "$IS_SPOTIFY" -eq 1 ]; then
echo "Spotify window detected. Using playerctl." >&2
# playerctl volume is a float from 0.0 to 1.0
# We use awk to convert our 5% to 0.05
CHANGE_FLOAT=$(awk "BEGIN {print $CHANGE_PCT / 100}")
case $ACTION in
--up)
playerctl --player=spotify volume "${CHANGE_FLOAT}+"
;;
--down)
playerctl --player=spotify volume "${CHANGE_FLOAT}-"
;;
--set)
# Convert 0-100 input to 0.0-1.0 float
TARGET_VOL=$(awk "BEGIN {print $ARGUMENT / 100}")
playerctl --player=spotify volume "$TARGET_VOL"
;;
*)
echo "$USAGE" >&2
exit 1
;;
esac
# We are done. Exit successfully.
exit 0
fi
# --- BRANCH 2: DEFAULT PACTL LOGIC (if not Spotify) ---
echo "Non-Spotify window. Using pactl." >&2
SINK_INPUT_INDEX=""
if [ -n "$FOCUSED_WIN_ID" ] && [ "$FOCUSED_WIN_ID" != "0" ]; then
# Get the PID of the focused window
PID=$(xprop -id "$FOCUSED_WIN_ID" _NET_WM_PID | awk '{print $NF}')
if [ -n "$PID" ]; then
# NEW: Get the binary name from the PID
BINARY_NAME=$(ps -p "$PID" -o comm= | tr -d '[:space:]')
echo "Looking for binary $BINARY_NAME"
if [ -n "$BINARY_NAME" ]; then
# Find PulseAudio sink input index for this BINARY_NAME
# This is more robust than PID for apps like browsers
SINK_INPUT_INDEX=$(pactl list sink-inputs | perl -ne '
BEGIN {
our $sink_id = -1;
our $maybe_sink_id = -1;
}
if (/Sink Input #(\d+)/) {
$maybe_sink_id = $1;
}
# Match the binary name, e.g., application.process.binary = "firefox"
if (/application\.process\.binary = "'"$BINARY_NAME"'"/) {
$sink_id = $maybe_sink_id;
}
END { print "$sink_id\n"; }
')
fi
fi
fi
CHANGE="${CHANGE_PCT}%"
set_volume() {
local target=$1
local diff=$2
if [[ "$target" == *#* ]]; then
echo "Setting volume for Sink Input $target ($diff)" >&2
pactl set-sink-input-volume "${target#SINK INPUT #}" "$diff"
else
echo "Setting default sink volume ($diff)" >&2
pactl set-sink-volume "$target" "$diff"
fi
}
TARGET="@DEFAULT_SINK@"
if [ -n "$SINK_INPUT_INDEX" ] && [ "$SINK_INPUT_INDEX" -ne -1 ]; then
TARGET="SINK INPUT #$SINK_INPUT_INDEX"
fi
case $ACTION in
--up)
set_volume "$TARGET" "+$CHANGE"
;;
--down)
set_volume "$TARGET" "-$CHANGE"
;;
--set)
# pactl can take a percentage directly
set_volume "$TARGET" "${ARGUMENT}%"
;;
*)
echo "$USAGE" >&2
exit 1
;;
esac
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