sample: Add playback tutorial 7 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 playback-tutorial-6.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 playback-tutorial-7.exe
 
 DEBUGS = $(addsuffix .mdb, $(TARGETS))
 assemblies = 					\
@@ -66,6 +66,9 @@ playback-tutorial-5.exe: $(srcdir)/PlaybackTutorial5.cs $(assemblies)
 playback-tutorial-6.exe: $(srcdir)/PlaybackTutorial6.cs $(assemblies)
 	$(CSC) $(CSFLAGS) -out:playback-tutorial-6.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/PlaybackTutorial6.cs
 
+playback-tutorial-7.exe: $(srcdir)/PlaybackTutorial7.cs $(assemblies)
+	$(CSC) $(CSFLAGS) -out:playback-tutorial-7.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/PlaybackTutorial7.cs
+
 EXTRA_DIST = 				\
 	Playback.cs \
     VideoOverlay.cs \
@@ -85,4 +88,5 @@ EXTRA_DIST = 				\
     PlaybackTutorial3.cs \
     PlaybackTutorial4.cs \
     PlaybackTutorial5.cs \
-    PlaybackTutorial6.cs
+    PlaybackTutorial6.cs \
+    PlaybackTutorial7.cs

samples/PlaybackTutorial7.cs

@@ -0,0 +1,62 @@
+// Authors
+//   Copyright (C) 2014 Stephan Sundermann <stephansundermann@gmail.com>
+
+using System;
+using Gst;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace GstreamerSharp
+{
+	class Playback
+	{
+		public static void Main (string[] args)
+		{
+			// Initialize GStreamer
+			Application.Init (ref args);
+
+			// Build the pipeline
+			var pipeline = Parse.Launch ("playbin uri=http://docs.gstreamer.com/media/sintel_trailer-480p.webm");
+
+			// Create the elements inside the sink bin
+			var equalizer = ElementFactory.Make ("equalizer-3bands", "equalizer");
+			var convert = ElementFactory.Make ("audioconvert", "convert");
+			var sink = ElementFactory.Make ("autoaudiosink", "audio_sink");
+			if (equalizer == null || convert == null || sink == null) {
+				Console.WriteLine ("Not all elements could be created.");
+				return;
+			}
+
+			// Create the sink bin, add the elements and link them
+			var bin = new Bin ("audio_sink_bin");
+			bin.Add (equalizer, convert, sink);
+			Element.Link (equalizer, convert, sink);
+			var pad = equalizer.GetStaticPad ("sink");
+			var ghostPad = new GhostPad ("sink", pad);
+			ghostPad.SetActive (true);
+			bin.AddPad (ghostPad);
+
+			// Start playing 
+			var ret = pipeline.SetState (State.Playing);
+			if (ret == StateChangeReturn.Failure) {
+				Console.WriteLine ("Unable to set the pipeline to the playing state.");
+				return;
+			}
+
+
+			// Configure the equalizer
+			equalizer ["band1"] = (double)-24.0;
+			equalizer ["band2"] = (double)-24.0;
+
+			// Set playbin2's audio sink to be our sink bin
+			pipeline ["audio-sink"] = bin;
+
+			// 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);
+		}
+	}
+}