sample: Add playback tutorial 6 sample

samples/Makefile.am

@@ -1,4 +1,4 @@
-TARGETS = playback.exe video-overlay.exe basic-tutorial-1.exe basic-tutorial-2.exe basic-tutorial-3.exe basic-tutorial-4.exe basic-tutorial-5.exe basic-tutorial-6.exe basic-tutorial-7.exe basic-tutorial-8.exe basic-tutorial-9.exe basic-tutorial-12.exe basic-tutorial-13.exe playback-tutorial-1.exe playback-tutorial-2.exe playback-tutorial-3.exe playback-tutorial-4.exe playback-tutorial-5.exe
+TARGETS = playback.exe video-overlay.exe basic-tutorial-1.exe basic-tutorial-2.exe basic-tutorial-3.exe basic-tutorial-4.exe basic-tutorial-5.exe basic-tutorial-6.exe basic-tutorial-7.exe basic-tutorial-8.exe basic-tutorial-9.exe basic-tutorial-12.exe basic-tutorial-13.exe playback-tutorial-1.exe playback-tutorial-2.exe playback-tutorial-3.exe playback-tutorial-4.exe playback-tutorial-5.exe playback-tutorial-6.exe
 
 DEBUGS = $(addsuffix .mdb, $(TARGETS))
 assemblies = 					\
@@ -63,6 +63,9 @@ playback-tutorial-4.exe: $(srcdir)/PlaybackTutorial4.cs $(assemblies)
 playback-tutorial-5.exe: $(srcdir)/PlaybackTutorial5.cs $(assemblies)
 	$(CSC) $(CSFLAGS) -out:playback-tutorial-5.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/PlaybackTutorial5.cs
 
+playback-tutorial-6.exe: $(srcdir)/PlaybackTutorial6.cs $(assemblies)
+	$(CSC) $(CSFLAGS) -out:playback-tutorial-6.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/PlaybackTutorial6.cs
+
 EXTRA_DIST = 				\
 	Playback.cs \
     VideoOverlay.cs \
@@ -81,4 +84,5 @@ EXTRA_DIST = 				\
     PlaybackTutorial2.cs \
     PlaybackTutorial3.cs \
     PlaybackTutorial4.cs \
-    PlaybackTutorial5.cs
+    PlaybackTutorial5.cs \
+    PlaybackTutorial6.cs

samples/PlaybackTutorial6.cs

@@ -0,0 +1,91 @@
+// Authors
+//   Copyright (C) 2014 Stephan Sundermann <stephansundermann@gmail.com>
+
+using System;
+using Gst;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace GstreamerSharp
+{
+	class Playback
+	{
+		const uint PlayFlagsVis = (1 << 3);
+
+		static Element Pipeline;
+
+		// Return TRUE if this is a Visualization element
+		static bool FilterVisFeatures (PluginFeature feature) {
+
+			if (!(feature is ElementFactory))
+				return false;
+			var factory = (ElementFactory)feature;
+			if (!factory.GetMetadata (Gst.Constants.ELEMENT_METADATA_KLASS).Contains ("Visualization"))
+				return false;
+
+			return true;
+		}
+
+		public static void Main (string[] args)
+		{
+			ElementFactory selectedFactory = null;
+
+			// Initialize GStreamer
+			Application.Init (ref args);
+
+			// Get a list of all visualization plugins
+			var list = Registry.Get().FeatureFilter (FilterVisFeatures, false);
+
+			// Print their names
+			Console.WriteLine ("Available visualization plugins:");
+			foreach (var walk in list) {
+				var factory = (ElementFactory)walk;
+				var name = factory.Name;
+				Console.WriteLine("  {0}", name);
+
+				if (selectedFactory == null && name.StartsWith ("goom")) {
+					selectedFactory = factory;
+				}
+			}
+
+			// Don't use the factory if it's still empty
+			// e.g. no visualization plugins found
+			if (selectedFactory == null) {
+				Console.WriteLine ("No visualization plugins found!");
+				return;
+			}
+
+			// We have now selected a factory for the visualization element
+			Console.WriteLine ("Selected '{0}'", selectedFactory.Name);
+			var visPlugin = selectedFactory.Create ();
+			if (visPlugin == null)
+				return;
+
+
+			// Build the pipeline
+			Pipeline = Parse.Launch ("playbin uri=http://1live.akacast.akamaistream.net/7/706/119434/v1/gnl.akacast.akamaistream.net/1live");
+
+			// Set the visualization flag
+			var flags = (uint)Pipeline ["flags"];
+			flags |= PlayFlagsVis;
+			Pipeline ["flags"] = flags;
+
+			// set vis plugin for playbin
+			Pipeline ["vis-plugin"] = visPlugin;
+
+			// Start playing 
+			var ret = Pipeline.SetState (State.Playing);
+			if (ret == StateChangeReturn.Failure) {
+				Console.WriteLine ("Unable to set the pipeline to the playing state.");
+				return;
+			}
+
+			// Wait until error or EOS 
+			var bus = Pipeline.Bus;
+			var msg = bus.TimedPopFiltered (Constants.CLOCK_TIME_NONE, MessageType.Error | MessageType.Eos);
+
+			// Free resources 
+			Pipeline.SetState (State.Null);
+		}
+	}
+}