setup/destination: higher-than

lib/setup/setupDestination

@@ -386,9 +386,29 @@ setupDestination() {
 	comeagain
 	destinationfrequency["$destination"]=$value
 	cat <<-EODesc
+
+        Higher-Than (bitrate, integer):
+            Only reencode files with bitrates higher then <bitrate>kbps. This
+            only applies if sample-rate, channel count and of course format are
+            equal. If unset, only files with bitrates equal to that of the
+            target will be copied (actually, hardlinking will be attempted
+            first).
+
+            As Ogg Vorbis target quality is not defined by its bitrate, Ogg
+            Vorbis files will always be reencoded if unset.
 	EODesc
 	comeagain() {
-		:
+		read							\
+			-e						\
+			${destinationmaxbps["$destination"]+-i${destinationmaxbps["$destination"]}}\
+			-p'Higher-Than: '				\
+			value
+		if ! [[ $value =~ $expr ]]
+		then
+			echo "Invalid higher-than bitrate value: $value" >&2
+			comeagain
+		fi
 	}
 	comeagain
+	destinationmaxbps[$destination]="$value"
 }