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Add GObject Introspection based GStreamer binding as sample

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1 parent a2d4b9f commit 6d2414b7e07767ce9406f2dc485bd17cb7f0463a @kou kou committed Jan 23, 2013
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  1. +55 −0 gstreamer/sample/gst-gi.rb
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+# Copyright (C) 2013 Ruby-GNOME2 Project Team
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+require "gobject-introspection"
+
+base_dir = Pathname.new(__FILE__).dirname.dirname.dirname.expand_path
+vendor_dir = base_dir + "vendor" + "local"
+vendor_bin_dir = vendor_dir + "bin"
+GLib.prepend_environment_path(vendor_bin_dir)
+
+module Gst
+ LOG_DOMAIN = "GStreamer"
+ GLib::Log.set_log_domain(LOG_DOMAIN)
+
+ class << self
+ @initialized = false
+ def init(argv=ARGV)
+ return if @initialized
+ @initialized = true
+ loader = Loader.new(self, argv)
+ loader.load("Gst")
+ end
+ end
+
+ class Loader < GObjectIntrospection::Loader
+ def initialize(base_module, init_arguments)
+ super(base_module)
+ @init_arguments = init_arguments
+ end
+
+ private
+ def pre_load(repository, namespace)
+ init = repository.find(namespace, "init")
+ argc, argv = init.invoke(1 + @init_arguments.size,
+ [$0] + @init_arguments)
+ @init_arguments.replace(argv)
+ end
+
+ def post_load(repository, namespace)
+ end
+ end
+end

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