view album art

aa.sh

#!/bin/bash

# aa -- view album art
# Expects either no argument (and will then query for the currently playing 
# song according to MPD) or one argument which is the path to a music file.
#
# Expects to find a file titled something like cover.jpg (see prefixes, 
# middles, suffixes below) in the same directory as the music file. If found an 
# image viewer is launched. If no DISPLAY is available, use img2txt to get 
# ASCII art if available.
#
# If getting the currently playing track from MPD, the MUSIC_PATH variable 
# needs to be set below.

MUSIC_PATH="$HOME/media/music"

PREFIXES=("" .)
MIDDLES=(cover coverart frontcover front albumart albumcover album folder)
SUFFIXES=(.png .jpg)

if [ $# -lt 1 ]; then
	mpc=$(mpc --format "%file%" | head -1)
	if [[ $mpc == "volume:"* ]]; then
		exit 3
	fi
	song="$MUSIC_PATH/$mpc"
else
	song="$1"
fi

dir=$(dirname "$song")

found=""
for pre in "${PREFIXES[@]}"; do
	for mid in "${MIDDLES[@]}"; do
		for suf in "${SUFFIXES[@]}"; do
			filename="$pre$mid$suf"
			if [ $(find "$dir" -maxdepth 1 -iname "$filename" | wc -l) -ge 1 ]; then
				found="$filename"
				break 3
			fi
		done
	done
done

if [ "x" = "x$found" ]; then
	echo "album art not found" >&2
	exit 1
fi

fullpath="$dir/$found"

# if there's a DISPLAY, try various gui image viewers
if [ $DISPLAY ]; then
	type gliv >/dev/null && { gliv "$fullpath" & exit; }
	type eog >/dev/null && { eog "$fullpath" & exit; }
	type feh >/dev/null && { feh "$fullpath" & exit; }
	type display >/dev/null && { display "$fullpath" & exit; }
fi

function size {
	# try environment variables
	x=$COLUMNS
	y=$ROWS
	if [ "z" = "z$x" -o "z" = "z$y" ]; then
		# fall back to stty size
		x=$(stty size | cut -d " " -f 2)
		y=$(stty size | cut -d " " -f 1)
		if [ "z" = "z$x" -o "z" = "z$y" ]; then
			# fall back to tput cols and lines
			x=$(tput cols)
			y=$(tput lines)
			if [ "z" = "z$x" -o "z" = "z$y" ]; then
				# give up and use defaults
				x=78
				y=39
			fi
		fi
	fi

	# take 1 from height for prompt
	let y=y-1

	if [ $(expr $y "*" 2) -gt $x ]; then
		# not enough columns to use full height
		y=$(expr $x / 2)
	else
		# not enough lines to use full width
		x=$(expr $y "*" 2)
	fi

	echo -e "$x\t$y"
}

size=$(size)
x=$(echo "$size" | cut -f 1)
y=$(echo "$size" | cut -f 2)

# if none of them existed or there was no DISPLAY, try text-mode image viewers
type img2txt >/dev/null && { img2txt -W $x -H $y "$fullpath"; exit; }

# fail
echo "found no suitable viewer" >&2
exit 2