59 lines
1.5 KiB
Bash
59 lines
1.5 KiB
Bash
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#!/usr/bin/env bash
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# Simple wrapper around pactl to keep volume in [0,100]% range. Optionally
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# plays an indicator sound after changing the volume
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#
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# Args:
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# 1: Change amount in percent. An integer
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# 2: Sound file to play. No sound is played if omitted or invalid
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declare -r ADJUST="$1"
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declare -r NOTIFY_SOUND="$2"
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declare -r MAX_VOLUME="100"
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set_volume() {
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if ! pactl set-sink-volume @DEFAULT_SINK@ "${1}%"; then
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printf "Failed to set default sink volume\n" >&2
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exit 1
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fi
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[[ -z "$NOTIFY_SOUND" ]] || play_notify_sound "$NOTIFY_SOUND"
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}
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play_notify_sound() {
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if ! [[ -r "$1" ]]; then
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printf "File '%s' is not readable" "$1" >&2
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exit 1
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fi
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if command -v ffmpeg &>/dev/null; then
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ffplay -nodisp -autoexit -v error "$1"
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elif command -v afplay &>/dev/null; then
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afplay "$1"
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else
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printf "Failed to find sound player for volume indication sound\n" >&2
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fi
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}
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if ! [[ "$ADJUST" =~ ^-?[0-9]+$ ]]; then
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printf "No volume change amount provided\n" >&2
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exit 1
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fi
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readonly curr_volume=$(pactl get-sink-volume @DEFAULT_SINK@ | awk '
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match($0, /[0-9]+%/) { printf "%s", substr($0, RSTART, RLENGTH - 1) }')
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if ! [[ "$curr_volume" =~ ^[0-9]+$ ]]; then
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printf "Failed to find default sink's volume: %s\n" "$curr_volume" >&2
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fi
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declare -ir new_volume=$(($curr_volume + $ADJUST))
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printf "Changing volumes from %d -> %d\n" "$curr_volume" "$new_volume" >&2
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if [[ "$new_volume" -gt "$MAX_VOLUME" ]]; then
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set_volume "$MAX_VOLUME"
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elif [[ "$new_volume" -lt "0" ]]; then
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set_volume "0"
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else
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set_volume "$new_volume"
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fi
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