lame: refactor & add optionals

pkgs/applications/audio/lame/default.nix

@@ -1,17 +1,62 @@
-{stdenv, fetchurl, nasm}:
+{ stdenv, fetchurl
+, nasmSupport ? true, nasm ? null # Assembly optimizations
+, cpmlSupport ? true # Compaq's fast math library
+#, efenceSupport ? false, libefence ? null # Use ElectricFence for malloc debugging
+, sndfileFileIOSupport ? false, libsndfile ? null # Use libsndfile, instead of lame's internal routines
+, analyzerHooksSupport ? true # Use analyzer hooks
+, decoderSupport ? true # mpg123 decoder
+, frontendSupport ? true # Build the lame executable
+#, mp3xSupport ? false, gtk1 ? null # Build GTK frame analyzer
+, mp3rtpSupport ? false # Build mp3rtp
+, debugSupport ? false # Debugging (disables optimizations)
+}:
 
+assert nasmSupport -> (nasm != null);
+#assert efenceSupport -> (libefence != null);
+assert sndfileFileIOSupport -> (libsndfile != null);
+#assert mp3xSupport -> (analyzerHooksSupport && (gtk1 != null));
+
+let
+  mkFlag = optSet: flag: if optSet then "--enable-${flag}" else "--disable-${flag}";
+in
+
+with stdenv.lib;
 stdenv.mkDerivation rec {
-  name = "lame-3.99.5";
+  name = "lame-${version}";
+  version = "3.99.5";
+
   src = fetchurl {
     url = "mirror://sourceforge/lame/${name}.tar.gz";
     sha256 = "1zr3kadv35ii6liia0bpfgxpag27xcivp571ybckpbz4b10nnd14";
   };
 
-  buildInputs = [ nasm ];
+  nativeBuildInputs = [ ]
+    ++ optional nasmSupport nasm;
 
-  configureFlags = [ "--enable-nasm" ];
+  buildInputs = [ ]
+    #++ optional efenceSupport libefence
+    #++ optional mp3xSupport gtk1
+    ++ optional sndfileFileIOSupport libsndfile;
 
-  # Either disable static, or fix the rpath of 'lame' for it to point
-  # properly to the libmp3lame shared object.
-  dontDisableStatic = true;
+  configureFlags = [
+    (mkFlag nasmSupport "nasm")
+    (mkFlag cpmlSupport "cpml")
+    #(mkFlag efenceSupport "efence")
+    (if sndfileFileIOSupport then "--with-fileio=sndfile" else "--with-fileio=lame")
+    (mkFlag analyzerHooksSupport "analyzer-hooks")
+    (mkFlag decoderSupport "decoder")
+    (mkFlag frontendSupport "frontend")
+    (mkFlag frontendSupport "dynamic-frontends")
+    #(mkFlag mp3xSupport "mp3x")
+    (mkFlag mp3rtpSupport "mp3rtp")
+    (if debugSupport then "--enable-debug=alot" else "")
+  ];
+
+  meta = {
+    description = "LAME is a high quality MPEG Audio Layer III (MP3) encoder";
+    homepage    = http://lame.sourceforge.net;
+    license     = licenses.lgpl;
+    maintainers = with maintainers; [ codyopel ];
+    platforms   = platforms.all;
+  };
 }