Create formula for gpac project, including MP4Box

GPAC (Gpac Project for Advanced Content) is a suite of tools for
manipulating mpeg-4/h.264 video files. The most common need for
this package is for the MP4Box application that will interleave
metadata in a .mp4 file to support fast start and streaming for
h.264 video.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Aliases/mp4box

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+../Formula/gpac.rb

Formula/gpac.rb

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+require 'formula'
+
+#
+# Installs a relatively minimalist version of the GPAC tools. The
+# most commonly used tool in this package is the MP4Box metadata
+# interleaver, which has relatively few dependencies.
+#
+# The challenge with building everything is that Gpac depends on
+# a much older version of FFMpeg and WxWidgets than the version
+# that Brew installs
+#
+
+class Gpac <Formula
+  url 'http://downloads.sourceforge.net/gpac/gpac-0.4.5.tar.gz'
+  homepage 'http://gpac.sourceforge.net/index.php'
+  md5 '755e8c438a48ebdb13525dd491f5b0d1'
+
+  depends_on 'sdl' => :optional
+
+  def install
+    ENV.deparallelize
+    system "chmod +x configure"
+    system "./configure", "--disable-wx", "--use-ffmpeg=no",
+                          "--prefix=#{prefix}",
+                          "--mandir=#{man}"
+    system "make"
+    system "make install"
+  end
+end