gnu: Add opus-tools

* gnu/packages/xiph.scm (opus-tools): New variable.

gnu/packages/xiph.scm

@@ -43,7 +43,8 @@ (define-module (gnu packages xiph)
             flac
             libkate
             vorbis-tools
-            opus))
+            opus
+            opus-tools))
 
 (define libogg
   (package
@@ -308,4 +309,37 @@ (define opus
 standardized by the Internet Engineering Task Force (IETF) as RFC 6716 which
 incorporated technology from Skype's SILK codec and Xiph.Org's CELT codec.")
     (license license:bsd-3)
-    (home-page "http://www.opus-codec.org/")))
+    (home-page "http://www.opus-codec.org")))
+
+(define opus-tools
+  (package
+    (name "opus-tools")
+    (version "0.1.9")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "ftp://ftp.mozilla.org/pub/mozilla.org/opus/opus-tools-"
+                    version ".tar.gz"))
+              (sha256
+               (base32 
+                "0fk4nknvl111k89j5yckmyrh6b2wvgyhrqfncp7rig3zikbkv1xi"))))
+    (build-system gnu-build-system)
+    (arguments
+     ;; The package developers misuse pkg-config such that it doesn't work
+     ;; when cross compiling.  Therefore we avoid it completly and set the 
+     ;; necessary flags ourselves.
+     `(#:configure-flags (list (string-append "CFLAGS=-I"
+                                              (assoc-ref %build-inputs "libogg")
+                                              "/include -I"
+                                              (assoc-ref %build-inputs "opus")
+                                              "/include/opus"))))
+    (inputs `(("libogg" ,libogg)
+              ("opus" ,opus)
+              ("flac" ,flac)))
+    (synopsis "Command line utilities to encode, inspect, and decode .opus
+files")
+    (description "Opus is a royalty-free, highly versatile audio codec.
+Opus-tools provide command line utilities for creating, inspecting and
+decoding .opus files")
+    (license license:bsd-3)
+    (home-page "http://www.opus-codec.org")))