nongnu: Add nv-codec-headers.

* nongnu/packages/nvidia.scm (nv-codec-headers): New variable.

nongnu/packages/nvidia.scm

@@ -209,6 +209,37 @@ nvidia-smi.")
 NVIDIA Management Library")
     (license license-gnu:bsd-3)))
 
+(define-public nv-codec-headers
+  (package
+    (name "nv-codec-headers")
+    (version "11.1.5.1")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url
+                     "https://git.videolan.org/git/ffmpeg/nv-codec-headers.git")
+                    (commit (string-append "n" version))))
+              (sha256
+               (base32
+                "05a6dfv6yackcyx7ysxfzf2h768y63ih8icdkkzi8bwq7hp8lcy9"))
+              (file-name (git-file-name name version))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:tests? #f ;no test suite
+       #:phases
+       (modify-phases %standard-phases
+         (delete 'configure)
+         (add-after 'unpack 'fix-prefix
+           (lambda* (#:key outputs #:allow-other-keys)
+             (substitute* "Makefile"
+               (("/usr/local") (assoc-ref outputs "out"))))))))
+    (supported-systems '("i686-linux" "x86_64-linux"))
+    (home-page "https://git.videolan.org/git/ffmpeg/nv-codec-headers.git")
+    (synopsis "FFmpeg headers required to interface with Nvidias codec APIs")
+    (description "This package provides FFmpeg headers required to interface
+with Nvidias codec APIs.")
+    (license license-gnu:expat)))
+
 (define-public nvidia-driver
   (package
     (name "nvidia-driver")