Add the LV2 version of the SWH audio plugins (used for audio production)

pkgs/applications/audio/swh-lv2/default.nix

@@ -0,0 +1,39 @@
+{ stdenv, fetchgit, fftwSinglePrec, libxslt, lv2, pkgconfig }:
+
+let
+  rev = "ec6b85e19e24ed";
+in
+stdenv.mkDerivation rec {
+  name = "swh-lv2-${rev}";
+
+  src = fetchgit {
+    url = "git://github.com/swh/lv2.git";
+    inherit rev;
+    sha256 = "d0d918ee642cd9649215737fcc008ce2bf55f4ea893a1897138b33775ea60d17";
+  };
+
+  patchPhase = ''
+    sed -e "s#xsltproc#${libxslt}/bin/xsltproc#" -i Makefile
+    sed -e "s#PREFIX = /usr/local#PREFIX = $out#" -i Makefile
+  '';
+
+  buildInputs = [ fftwSinglePrec lv2 pkgconfig ];
+
+  installPhase = "make install-system";
+
+  meta = with stdenv.lib; {
+    homepage = http://plugin.org.uk;
+    description = "LV2 version of Steve Harris' SWH plugins";
+    longDescription = ''
+      SWH plugins include:
+      amp, fast overdrive, overdrive (with colourisation), comb
+      filter, waveshaper, ringmod, divider, diode, decliper, pitch
+      scaler, 16 band equaliser, sinus wavewrapper, hermes filter,
+      chorus, flanger, decimater, oscillator, gverb, phasers, harmonic
+      generators, surround encoders and more.
+    '';
+    license = licenses.gpl3;
+    maintainers = [ maintainers.goibhniu ];
+    platforms = platforms.linux;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -7702,6 +7702,8 @@ let
 
   svk = perlPackages.SVK;
 
+  swh_lv2 = callPackage ../applications/audio/swh-lv2 { };
+
   sylpheed = callPackage ../applications/networking/mailreaders/sylpheed {
     sslSupport = true;
     gpgSupport = true;