#! /bin/zsh

# clone system:
#
#   $ fdisk -l
#
#   $ sudo dd bs=4M if=/dev/sdb of=backup-$(date +%Y-%m-%d).img
#
#   $ sudo raspi-config

export aplay_test_file=~/bo/bo/bo.m4a

aplay-test-file-hw () {
    local file=$aplay_test_file
    [[ -f $file ]]             &&
        aplay -Dhw:0,0   $file ||
        echo no-file-msg $file
}

aplay-test-file () {
    local file=$aplay_test_file
    [[ -f $file ]]             &&
        aplay -q $file         ||
        echo no-file-msg $file
}

test-aplay () {
    echo "HDMI"
    force-hdmi
    aplay-test-file

    echo "3.5 mm jack"
    force-jack
    aplay-test-file

    echo "auto detection"
    force-auto
    aplay-test-file
}

# From:
#   https://www.raspberrypi.org/documentation/configuration/audio-config.md

change-audio-output () {
    local output=$1
    local card=3
    amixer -q cset numid=$card $output
}

## HDMI
## with hdmi_drive=2 in /boot/config.txt
force-hdmi () {
    local hdmi=2
    change-audio-output $hdmi
}
hdmi-status () {
    tvservice -a
}
test-hdmi () {
    local file=$1
    sudo omxplayer -o hdmi $file
}

## 3.5 mm analog 'headphone' jack
force-jack () {
    local jack=1
    change-audio-output $jack
}
test-jack () {
    local file=$1
    sudo omxplayer -o local $file
}

## auto
force-auto () {
    local auto=0
    change-audio-output $auto
}