#! /bin/zsh
#
# this file:
#   https://dataswamp.org/~incal/.zsh/audio-test
#
# don't do this:
#
#   $ pactl load-module module-equalizer-sink
#   $ pactl load-module module-dbus-protocol
#
# commands:
#
#   $ /etc/init.d/alsa-utils restart
#
#   $ pulseaudio -D
#   $ pulseaudio --check
#
#   $ sudo rm -fr ~/.config/pulse /tmp/pulse-*
#   $ pulseaudio --kill
#   $ pulseaudio --start

audio-online () {
    aplay -l   > /dev/null  &&
    pactl list > /dev/null  &&
    echo up || echo down
}

test-audio-a () {
    local snd=/usr/share/sounds/alsa/Front_Center.wav
    local out
    if [ -f $snd ]; then
        for out in 0..2; do
            echo "output: $output"
            sudo amixer -q -c 0 cset numid=3 $out
            sudo aplay  -q $snd
        done
    else
        echo "no file $snd" >&2
    fi
}

test-audio-b () {
    local bin=/opt/vc/src/hello_pi/hello_audio/hello_audio.bin
    if [ -x $bin ]; then
        echo "C-< or ^\ when done"
        sudo $bin   # 3.5 mm jack
        sudo $bin 1 # HDMI
    else
        echo "no bin $bin" >&2
    fi
}

test-audio-list () {
    echo "$ sudo lspci | grep Audio"
    sudo lspci | grep Audio

    echo "$ sudo lsmod | grep snd"
    sudo lsmod | grep snd

    echo "$ aplay -l"
    aplay -l

    echo "$ pacmd list-sinks"
    pacmd list-sinks

    echo "$ acmd list-sinks"
    pacmd list-sinks
}

test-audio () {
    sudo modprobe snd_bcm2835
    audio-online
    test-audio-a
    test-audio-b
    test-audio-list
}