use ffmpeg for MP3, MPC, and unknown file-type tags

lib/tags/getInfos::APE

@@ -1,55 +0,0 @@
-#!/bin/bash
-getInfosAPE_version='APE-1'
-tagreaders+=( "$getInfosAPE_version" )
-getInfos::APE() {
-	# I was not able to find a decent cli tool to read APE tags.
-	# This is raw but works for the very few MusePack files I got.
-	#
-	# Please tell me if you know of any good tool.
-	tagreader="$getInfosAPE_version"
-	IFS='='
-	while read tag value
-	do
-		IFS="$oldIFS"
-		case $tag in
-			[Aa][Ll][Bb][Uu][Mm]' '[Aa][Rr][Tt][Ii][Ss][Tt])
-				albumartist="$value"
-			;;
-			[Aa][Rr][Tt][Ii][Ss][Tt])
-				artist="$value"
-			;;
-			[Yy][Ee][Aa][Rr])
-				year="$value"
-			;;
-			[Aa][Ll][Bb][Uu][Mm])
-				album="$value"
-			;;
-			[Tt][Ii][Tt][Ll][Ee])
-				title="$value"
-			;;
-			[Tt][Rr][Aa][Cc][Kk])
-				tracknum="$value"
-			;;
-			[Gg][Ee][Nn][Rr][Ee])
-				genre="$value"
-			;;
-			[Cc][Oo][Mm][Pp][Oo][Ss][Ee][Rr])
-				composer="$value"
-			;;
-			[Pp][Ee][Rr][Ff][Oo][Rr][Mm][Ee][Rr])
-				performer="$value"
-			;;
-			*)
-			;;
-		esac
-		IFS='='
-	done < <(
-		IFS="$oldIFS"
-		sed							\
-		's/APETAGEX/\n/;s/[\x00\-\x1F]\x00\+/\n/g;s/\x00/=/g'	\
-		"$sourcepath/$filename"					\
-		| egrep -i 						\
-		'^(Album Artist|Artist|Year|Album|Title|Track|Genre|Composer|Performer)='
-	)
-	IFS="$oldIFS"
-}

lib/tags/getInfos::MP3

@@ -1,27 +0,0 @@
-#!/bin/bash
-getInfosMP3_version='ID3-3'
-tagreaders+=( "$getInfosMP3_version" )
-getInfos::MP3() {
-	tagreader="$getInfosMP3_version"
-	infos=$(
-		soxi "$sourcepath/$filename" 2>/dev/null	\
-		| sed 's/ *: /=/'
-	)
-	album=$(gettag album)
-	artist=$(gettag artist)
-	genre=$(gettag genre)
-	title=$(gettag title)
-	tracknum=$(gettag tracknumber)
-	year=$(gettag year)
-	expr='^[0-9]*$'
-	if [[ $genre =~ $expr ]]
-	then
-		genre="${id3genres[$genre]}"
-	fi
-	infos="${infos/: /=}"
-	channels=$(gettag channels)
-	rate=$(gettag 'sample rate')
-	bitrate=$(gettag 'bit rate')
-	bitrate=${bitrate%%.*}
-	bitrate=${bitrate%k}
-}

lib/tags/getRateChannelMPC

@@ -1,16 +0,0 @@
-#!/bin/bash
-getRateChannelMPC() {
-	while read key value garbage
-	do
-		case $key in
-			'samplerate:')
-				rate=$value
-			;;
-			'channels:')
-				channels=$value
-			;;
-		esac
-	done < <(
-		mpcdec "$sourcepath/$filename" -i 2>&1
-	)
-}

lib/tags/getRateChannelSoxi

@@ -1,5 +0,0 @@
-#!/bin/bash
-getRateChannelSoxi() {
-	rate=$(soxi -r "$sourcepath/$filename" 2>/dev/null)
-	channels=$(soxi -c "$sourcepath/$filename" 2>/dev/null)
-}

lib/tags/getTags

@@ -1,11 +1,11 @@
 #!/bin/bash
-getTags_version='unknown-3'
+getTags_version='unknown-4'
 tagreaders+=( "$getTags_version" )
 getTags() {
 	unset type
 	case "$mimetype" in
 		audio/mpeg)
-			type=MP3
+			type=ffmpeg
 		;;
 		'application/ogg opus')
 			type=Opus
@@ -20,20 +20,7 @@ getTags() {
 			type=ffmpeg
 		;;
 		*)
-			extendedtype=$(file -b "$sourcepath/$filename")
-			case "$extendedtype" in
-				*' ID3 '*)
-					type=MP3
-				;;
-				*'Musepack '*)
-					getRateChannelMPC
-					tryAPE
-				;;
-				*)
-					getRateChannelSoxi
-					tryAPE
-				;;
-			esac
+			type=ffmpeg
 		;;
 	esac
 	if [ -n "$type" ]