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#!/bin/bash
#
# SPDX-License-Identifier: GPL-3.0-or-later
# If there are multiple usable sound cards, prompt the user to choose one,
# using auditory feedback.
# This script is released under the GNU General Public License.
# shellcheck disable=SC1091
source /usr/share/livecd-sound/functions
nwords() {
echo $#
}
is_numeric() {
local str=$1
expr "$str" : '[[:digit:]]\+$' > /dev/null 2>&1
}
set_default_card() {
local card=$1
sed -e "s/%card%/$card/g" < /usr/share/livecd-sound/asound.conf.in \
> /etc/asound.conf
}
play_on_card() {
local card=$1 file=$2
aplay "-Dplughw:$card,0" "$file"
}
set -f
usable_cards="$(list_non_pcsp_cards)"
num_usable_cards=$(nwords "$usable_cards")
if [ "$num_usable_cards" -eq 1 ]; then
exit 0
fi
for card in $usable_cards; do
if ! is_numeric "$card"; then
continue
fi
play_on_card "$card" /usr/share/livecd-sound/sounds/pick-a-card.wav&
done
wait
sleep 1
for card in $usable_cards; do
if ! is_numeric "$card"; then
continue
fi
play_on_card "$card" /usr/share/livecd-sound/sounds/beep.wav
if read -rt 10; then
set_default_card "$card"
break
fi
done
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