sample: Add basic tutorial 4 sample

2 files changed, 142 insertions, 2 deletions

diff --git a/samples/BasicTutorial4.cs b/samples/BasicTutorial4.cs
new file mode 100644
index 0000000..a1d5f59
--- /dev/null
+++ b/samples/BasicTutorial4.cs
@@ -0,0 +1,136 @@
+// Authors
+//   Copyright (C) 2014 Stephan Sundermann <stephansundermann@gmail.com>
+
+using System;
+using Gst; 
+
+namespace GstreamerSharp
+{
+	class Playback
+	{
+		static Element playbin;
+		static bool playing;
+		static bool terminate;
+		static bool seekEnabled;
+		static bool seekDone;
+		static long duration;
+
+		public static void Main (string[] args)
+		{
+			// Initialize Gstreamer
+			Application.Init(ref args);
+
+			// Create the elements
+			playbin = ElementFactory.Make ("playbin", "playbin");
+
+			if (playbin == null) {
+				Console.WriteLine ("Not all elements could be created");
+				return;
+			}
+
+			// Set the URI to play.
+			playbin ["uri"] = "http://download.blender.org/durian/trailer/sintel_trailer-1080p.mp4";
+
+			// Start playing
+			var ret = playbin.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 = playbin.Bus;
+			do {
+				var msg = bus.TimedPopFiltered (100 * Constants.MSECOND, MessageType.StateChanged | MessageType.Error |  MessageType.DurationChanged);
+
+				// Parse message
+				if (msg != null) {
+					HandleMessage (msg);
+				}
+				else {
+					// We got no message, this means the timeout expired
+					if (playing) {
+						var fmt = Format.Time;
+						var current = -1L;
+
+						// Query the current position of the stream
+						if (!playbin.QueryPosition (fmt, out current)) {
+							Console.WriteLine ("Could not query current position.");
+						}
+
+						// if we didn't know it yet, query the stream position
+						if (duration <= 0) {
+							if (!playbin.QueryDuration (fmt, out duration)) {
+								Console.WriteLine ("Could not query current duration.");
+							}
+						}
+
+						// Print current position and total duration
+						Console.WriteLine ("Position {0} / {1}", new TimeSpan (current), new TimeSpan (duration));
+
+						if (seekEnabled && seekDone && current > 10L * Constants.SECOND) {
+							Console.WriteLine ("Readed 10s, performing seek...");
+							playbin.SeekSimple (fmt, SeekFlags.KeyUnit, 30L * Constants.SECOND);
+							seekDone = true;
+						}
+					}
+				}
+			} while (!terminate);
+		}
+
+		private static void HandleMessage (Message msg) {
+			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);
+				terminate = true;
+				break;
+			case MessageType.Eos:
+				Console.WriteLine("End-Of-Stream reached.");
+				terminate = true;
+				break;
+			case MessageType.DurationChanged:
+				// The duration has changed, mark the current one as invalid
+				duration = -1;
+				break;
+			case MessageType.StateChanged:
+				// We are only interested in state-changed messages from the pipeline
+				if (msg.Src == playbin) {
+					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));
+
+					// Remember wheather we are in the PLAYING state
+					playing = newState == State.Playing;
+
+					if (playing) {
+						// We have just moved to PLAYING. Check if seeking is possible
+						var query = Query.NewSeeking (Format.Time);
+						long start, end;
+						Format fmt = Format.Time;
+
+						if (playbin.Query (query)) {
+							query.ParseSeeking (out fmt, out seekEnabled, out start, out end);
+
+							if (seekEnabled) {
+								Console.WriteLine ("Seeking is ENABLED from {0} to {1}", new TimeSpan(start), new TimeSpan(end));
+							} else {
+								Console.WriteLine ("Seeking DISABLED for this stream.");
+							}
+						} else {
+							Console.WriteLine ("Seeking query failed.");
+						}
+					}
+				}
+				break;
+			default:
+				// We should not reach here
+				Console.WriteLine ("Unexpected message received.");
+				break;
+			} 
+		}
+	}
+}
\ No newline at end of file
diff --git a/samples/Makefile.am b/samples/Makefile.am
index d8e7e04..b161e74 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 basic-tutorial-3.exe
+TARGETS = playback.exe video-overlay.exe basic-tutorial-1.exe basic-tutorial-2.exe basic-tutorial-3.exe basic-tutorial-4.exe
 
 DEBUGS = $(addsuffix .mdb, $(TARGETS))
 assemblies = 					\
@@ -24,9 +24,13 @@ basic-tutorial-2.exe: $(srcdir)/BasicTutorial2.cs $(assemblies)
 basic-tutorial-3.exe: $(srcdir)/BasicTutorial3.cs $(assemblies)
 	$(CSC) $(CSFLAGS) -out:basic-tutorial-3.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/BasicTutorial3.cs
 
+basic-tutorial-4.exe: $(srcdir)/BasicTutorial4.cs $(assemblies)
+	$(CSC) $(CSFLAGS) -out:basic-tutorial-4.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/BasicTutorial4.cs
+
 EXTRA_DIST = 				\
 	Playback.cs \
     VideoOverlay.cs \
     BasicTutorial1.cs \
     BasicTutorial2.cs \
-    BasicTutorial3.cs
+    BasicTutorial3.cs \
+    BasicTutorial4.cs