gnu: Add phonon-backend-vlc.

* gnu/packages/kde-frameworks.scm (phonon-plugin-vlc): New variable.

Change-Id: I5a680d55782cbfcd6349efc64cce36457f456377
Signed-off-by: Zheng Junjie <zhengjunjie@iscas.ac.cn>

gnu/packages/kde-frameworks.scm

@@ -288,6 +288,33 @@ Phonon-GStreamer is a backend based on the GStreamer multimedia library.")
     ;; license: source files mention "either version 2.1 or 3"
     (license (list license:lgpl2.1 license:lgpl3))))
 
+(define-public phonon-backend-vlc
+  (package
+    (name "phonon-backend-vlc")
+    (version "0.12.0")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "mirror://kde/stable/phonon/"
+                    name "/" version "/"
+                    name "-" version ".tar.xz"))
+              (sha256
+               (base32
+                "19f9wzff4nr36ryq18i6qvsq5kqxfkpqsmsvrarr8jqy8pf7k11k"))))
+    (build-system cmake-build-system)
+    (arguments
+     (list #:configure-flags
+           #~(list "-DPHONON_BUILD_QT6=OFF")))
+    (native-inputs
+     (list extra-cmake-modules qttools-5))
+    (inputs
+     (list phonon qtbase-5 vlc))
+    (home-page "https://community.kde.org/Phonon")
+    (synopsis "Phonon backend which uses VLC")
+    (description "Phonon makes use of backend libraries to provide sound.
+Phonon-VLC is a backend based on the VLC multimedia library.")
+    (license license:lgpl2.1)))
+
 
 ;; Tier 1
 ;;