Show Volumio2 album thumbnail on ILI9341 based display.

volumio-album-art.sh

#!/bin/bash

# DEPENDENCIES
#	apt-get -y install fbi curl

# PINOUT: Display -> Raspberry Pi Zero
#	BL	->		pin 12 (GPIO 18)
#	SCK	->		pin 23 (GPIO 11)
#	MISO	->		pin 21 (GPIO 9)
#	MOSI	->		pin 19 (GPIO 10)
#	CS 	->		pin 24 (GPIO 8)
#	RST 	->		pin 22 (GPIO 25)
#	D/C 	->		pin 18 (GPIO 24)
#	VIN 	->		pin 17 (3.3v)
#	GND 	->		pin 20 (GND)


# PINOUT: Display -> Orange Pi Zero
#	BL	->		pin 15 (GPIO 3)
#	SCK	->		pin 23 (GPIO 14)
#	MOSI	->		pin 19 (GPIO 15)
#	CS 	->		pin 24 (GPIO 13)
#	RST 	->		pin 11 (GPIO 1)
#	D/C 	->		pin 13 (GPIO 0)
#	VIN 	->		pin 2 (3.3v)
#	GND 	->		pin 20 (GND)

VERBOSE=${VERBOSE:-false}
VOLUMIO_HOST="http://localhost:3000"
ALBUM_ART_FILE="/tmp/albumart.image"
DEFAULT_ALBUM_ART_FILE="${ALBUM_ART_FILE}.default"
FB=/dev/fb1

function hasBinary() {
	for arg in $@; do
		hash ${1} || ( echo "Missing binary ${1}"; exit 1);
	done
}

function restApiGet() {
	curl "${VOLUMIO_HOST}/api/v1/getstate" 2> /dev/null | jq -r "${1}"
}

function downloadAlbumArt() {
	curl ${1} > ${2} 2> /dev/null
}

hasBinary fbi curl

lsmod  | grep -q fbtft_device || \
	modprobe fbtft_device custom name=fb_ili9341 gpios=reset:1,dc:0,led:3 speed=16000000 fps=25 rotate=90 busnum=1

# opi-zero	modprobe fbtft_device custom name=fb_ili9341 gpios=reset:1,dc:0,led:3 speed=16000000 fps=25 rotate=90 busnum=1
# rpi-zero	modprobe fbtft_device custom name=fb_ili9341  gpios=reset:25,dc:24,led:7 speed=16000000 bgr=1 rotate=90

LAST_TRACK='none'
test -f ${DEFAULT_ALBUM_ART_FILE} || \
	downloadAlbumArt "${VOLUMIO_HOST}/albumart" ${DEFAULT_ALBUM_ART_FILE}
fbi -d ${FB} -T 1 -noverbose -a ${DEFAULT_ALBUM_ART_FILE} 2> /dev/null

while [[ true ]]; do
	sleep 1

	CUR_TRACK=`restApiGet '.title,.artist,.album'`
	if [[ "${LAST_TRACK}" == "${CUR_TRACK}" ]]; then
		[ "${VERBOSE}" == "true" ] && echo -e "$(date)\tSkipping no change."
		continue
	else
		LAST_TRACK=${CUR_TRACK}
	fi

	STATUS=`restApiGet '.status'`
	if [[ "${STATUS}" == "play" ]] || [[ "${STATUS}" == "pause" ]]; then
		[ "${VERBOSE}" == "true" ] && echo -e "$(date)\tDownloading current albumart."
		ALBUM_ART_URI=`restApiGet '.albumart'`

		echo ${ALBUM_ART_URI} | grep "^/albumart?" && ALBUM_ART_URI="${VOLUMIO_HOST}${ALBUM_ART_URI}"

		downloadAlbumArt ${ALBUM_ART_URI} ${ALBUM_ART_FILE}
		fbi -d ${FB} -T 1 -noverbose -a ${ALBUM_ART_FILE} 2> /dev/null || LAST_TRACK=''
	else
		[ "${VERBOSE}" == "true" ] && echo -e "$(date)\tChanging to stock albumart."
		fbi -d ${FB} -T 1 -noverbose -a ${DEFAULT_ALBUM_ART_FILE} 2> /dev/null
	fi
done