sample: Add basic tutorial 3 sample

2 files changed, 131 insertions, 2 deletions

diff --git a/samples/BasicTutorial3.cs b/samples/BasicTutorial3.cs
new file mode 100644
index 0000000..c43e4fb
--- /dev/null
+++ b/samples/BasicTutorial3.cs
@@ -0,0 +1,125 @@
+// Authors
+//   Copyright (C) 2014 Stephan Sundermann <stephansundermann@gmail.com>
+
+using System;
+using Gst; 
+
+namespace GstreamerSharp
+{
+	class Playback
+	{
+		static Pipeline pipeline;
+		static Element source;
+		static Element convert;
+		static Element sink;
+
+		public static void Main (string[] args)
+		{
+			// Initialize Gstreamer
+			Application.Init(ref args);
+
+			// Create the elements
+			source = ElementFactory.Make ("uridecodebin", "source");
+			convert = ElementFactory.Make ("audioconvert", "convert");
+			sink = ElementFactory.Make ("autoaudiosink", "sink");
+
+			// Create the empty pipeline
+			pipeline = new Pipeline ("test-pipeline");
+
+			if (source == null || convert == null || sink == null || pipeline == null) {
+				Console.WriteLine ("Not all elements could be created");
+				return;
+			}
+
+			// Build the pipeline. Note that we are NOT linking the source at this point.
+			// We will do it later.
+			pipeline.Add (source, convert, sink);
+			if (!convert.Link (sink)) {
+				Console.WriteLine ("Elements could not be linked");
+				return;
+			}
+
+			// Set the URI to play
+			source ["uri"] = "http://download.blender.org/durian/trailer/sintel_trailer-1080p.mp4";
+
+			// Connect to the pad-added signal
+			source.PadAdded += HandlePadAdded;
+
+			// Start playing
+			var ret = pipeline.SetState (State.Playing);
+			if (ret == StateChangeReturn.Failure) {
+				Console.WriteLine ("Unable to set the pipeline to the playing state.");
+				return;
+			}
+
+			// Listen to the bus
+			var bus = pipeline.Bus;
+			bool terminated = false;
+			do {
+				var msg = bus.TimedPopFiltered (Constants.CLOCK_TIME_NONE, MessageType.StateChanged | MessageType.Error | MessageType.Eos);
+
+				if (msg != null) {
+					switch (msg.Type) {
+					case MessageType.Error:
+						string debug;
+						GLib.GException exc;
+						msg.ParseError (out exc, out debug);
+						Console.WriteLine (string.Format ("Error received from element {0}: {1}", msg.Src.Name, exc.Message));
+						Console.WriteLine ("Debugging information: {0}", debug);
+						terminated = true;
+						break;
+					case MessageType.Eos:
+						Console.WriteLine("End-Of-Stream reached.");
+						terminated = true;
+						break;
+					case MessageType.StateChanged:
+						// We are only interested in state-changed messages from the pipeline
+						if (msg.Src == pipeline) {
+							State oldState, newState, pendingState;
+							msg.ParseStateChanged(out oldState, out newState, out pendingState);
+							Console.WriteLine ("Pipeline state changed from {0} to {1}:", Element.StateGetName(oldState), Element.StateGetName(newState));
+						}
+						break;
+					default:
+						// We should not reach here
+						Console.WriteLine ("Unexpected message received.");
+						break;
+					}
+				}
+			} while (!terminated);
+
+			pipeline.SetState (State.Null);
+		}
+
+		static void HandlePadAdded (object o, PadAddedArgs args)
+		{
+			var src = (Element)o;
+			var newPad = args.NewPad;
+			var sinkPad = convert.GetStaticPad ("sink");
+
+			Console.WriteLine (string.Format ("Received new pad '{0}' from '{1}':", newPad.Name, src.Name));
+
+			// If our converter is already linked, we have nothing to do here
+			if (sinkPad.IsLinked) {
+				Console.WriteLine ("We are already linked. Ignoring.");
+				return;
+			}
+
+			// Check the new pad's type
+			var newPadCaps = newPad.Caps;
+			var newPadStruct = newPadCaps.GetStructure (0);
+			var newPadType = newPadStruct.Name;
+			if (!newPadType.StartsWith ("audio/x-raw")) {
+				Console.WriteLine ("It has type '{0}' which is not raw audio. Ignoring.", newPadType);
+				return;
+			}
+
+			// Attempt the link
+			var ret = newPad.Link (sinkPad);
+			if (ret != PadLinkReturn.Ok)
+				Console.WriteLine ("Type is '{0} but link failed.", newPadType);
+			else
+				Console.WriteLine ("Link succeeded (type '{0}').", newPadType);
+		}
+	}
+}
\ No newline at end of file
diff --git a/samples/Makefile.am b/samples/Makefile.am
index 862227d..d8e7e04 100644
--- a/samples/Makefile.am
+++ b/samples/Makefile.am
@@ -1,4 +1,4 @@
-TARGETS = playback.exe video-overlay.exe basic-tutorial-1.exe basic-tutorial-2.exe
+TARGETS = playback.exe video-overlay.exe basic-tutorial-1.exe basic-tutorial-2.exe basic-tutorial-3.exe
 
 DEBUGS = $(addsuffix .mdb, $(TARGETS))
 assemblies = 					\
@@ -21,8 +21,12 @@ basic-tutorial-1.exe: $(srcdir)/BasicTutorial1.cs $(assemblies)
 basic-tutorial-2.exe: $(srcdir)/BasicTutorial2.cs $(assemblies)
 	$(CSC) $(CSFLAGS) -out:basic-tutorial-2.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/BasicTutorial2.cs
 
+basic-tutorial-3.exe: $(srcdir)/BasicTutorial3.cs $(assemblies)
+	$(CSC) $(CSFLAGS) -out:basic-tutorial-3.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/BasicTutorial3.cs
+
 EXTRA_DIST = 				\
 	Playback.cs \
     VideoOverlay.cs \
     BasicTutorial1.cs \
-    BasicTutorial2.cs
+    BasicTutorial2.cs \
+    BasicTutorial3.cs