opus tags

* differentiate Ogg Vorbis and Opus
* read Opus tags

atom

@@ -679,6 +679,17 @@ getFiles() {
 			EOWhere
 		then
 			mimetype=$(file -b --mime-type "$sourcepath/$filename")
+			if [[ $mimetype == application/ogg ]]
+			then
+				case "$(head -n1 "$sourcepath/$filename")" in
+					*'vorbis'*)
+						mimetype+=' vorbis'
+					;;
+					*'OpusHead'*)
+						mimetype+=' opus'
+					;;
+				esac
+			fi
 			mimetypeid=$(
 				InsertIfUnset mime_types <<-EOInsert
 					mime_text $mimetype
@@ -837,6 +848,36 @@ getInfos::Ogg() {
 	bitrate=${bitrate%%,*}
 }
 
+getInfosOpus_version='Opus-1'
+tagreaders+=( "$getInfosOpus_version" )
+getInfos::Opus() {
+	tagreader="$getInfosOpus_version"
+	infos=$(
+		opusinfo "$sourcepath/$filename"	\
+		| sed 's/\t//'
+	)
+	albumartist=$(gettag albumartist)
+	album=$(gettag album)
+	artist=$(gettag artist)
+	composer=$(gettag composer)
+	disc=$(gettag discnumber)
+	genre=$(gettag genre)
+	performer=$(gettag performer)
+	title=$(gettag title)
+	tracknum=$(gettag tracknumber)
+	tracktotal=$(gettag tracktotal)
+	if [ -n "$tracknum" -a -n "$tracktotal" ]
+	then
+		tracknum="$tracknum/$tracktotal"
+	fi
+	year=$(gettag date)
+	infos="${infos/: /=}"
+	rate=$(gettag 'original sample rate'|head -n1)
+	channels=$(gettag channels|head -n1)
+	bitrate=$(gettag 'average bitrate')
+	bitrate=${bitrate%%.*}
+}
+
 getInfosFLAC_version='FLAC-1'
 tagreaders+=( "$getInfosFLAC_version" )
 getInfos::FLAC() {
@@ -943,7 +984,7 @@ tryAPE() {
 	&& type=APE
 }
 
-getTags_version='unknown-1'
+getTags_version='unknown-2'
 tagreaders+=( "$getTags_version" )
 getTags() {
 	unset type
@@ -951,7 +992,10 @@ getTags() {
 		audio/mpeg)
 			type=MP3
 		;;
-		application/ogg)
+		'application/ogg opus')
+			type=Opus
+		;;
+		application/ogg*)
 			type=Ogg
 		;;
 		audio/x-flac)