sample: Add basic tutorial 13 sample

samples/BasicTutorial13.cs

@@ -0,0 +1,121 @@
+// Authors
+//   Copyright (C) 2014 Stephan Sundermann <stephansundermann@gmail.com>
+
+using System;
+using Gst;
+using System.Runtime.InteropServices;
+
+namespace GstreamerSharp
+{
+	class Playback
+	{
+		static bool Playing; // Playing or Paused
+		static double Rate; //Current playback rate (can be negative)
+		static Element Pipeline, VideoSink;
+
+		// Send seek event to change rate
+		static void SendSeekEvent () {
+			var format = Format.Time;
+			long position;
+
+			// Obtain the current position, needed for the seek event
+			if (!Pipeline.QueryPosition (format, out position)) {
+				Console.WriteLine ("Unable to retrieve current position.");
+				return;
+			}
+
+			Event seekEvent;
+			// Create the seek event
+			if (Rate > 0) {
+				seekEvent = new Event (Rate, Format.Time, SeekFlags.Flush | SeekFlags.Accurate, SeekType.Set, position, SeekType.None, 0);
+			} else {
+				seekEvent = new Event (Rate, Format.Time, SeekFlags.Flush | SeekFlags.Accurate, SeekType.Set, 0, SeekType.Set, position);
+			}
+
+			if (VideoSink == null) {
+				// If we have not done so, obtain the sink through which we will send the seek events
+				VideoSink = (Element)Pipeline ["video-sink"];
+			}
+
+			// Send the event
+			VideoSink.SendEvent (seekEvent);
+
+			Console.WriteLine ("Current rate: {0}", Rate);
+		}
+
+		// Process keyboard input
+		static void HandleKeyboard () {
+			ConsoleKeyInfo x;
+			bool terminate = false;
+			while (!terminate) {
+				x = Console.ReadKey ();
+				switch (x.Key) {
+				case ConsoleKey.P :
+					Playing = !Playing;
+					Pipeline.SetState (Playing ? State.Playing : State.Paused);
+					Console.WriteLine ("Setting state to {0}", Playing ? "PLAYING" : "PAUSE");
+					break;
+				case ConsoleKey.S:
+					if (x.Modifiers == ConsoleModifiers.Shift)
+						Rate *= 2.0;
+					else
+						Rate /= 2.0;
+					SendSeekEvent ();
+					break;
+				case ConsoleKey.D:
+					Rate *= -1.0;
+					SendSeekEvent ();
+					break;
+				case ConsoleKey.N:
+					if (VideoSink == null) {
+						// If we have not done so, obtain the sink through which we will send the step events
+						VideoSink = (Element)Pipeline ["video-sink"];
+					}
+					var evnt = new Event (Format.Buffers, 1, Rate, true, false);
+					VideoSink.SendEvent (evnt);
+
+					Console.WriteLine ("Stepping one frame");
+					break;
+				case ConsoleKey.Q:
+					terminate = true;
+					break;
+				default:
+					break;
+				}
+			}
+		}
+
+		public static void Main (string[] args)
+		{
+			// Initialize GStreamer
+			Application.Init (ref args);
+
+			// Print usage map
+			Console.WriteLine ("USAGE: Choose one of the following options, then press enter:");
+			Console.WriteLine (" 'P' to toggle between PAUSE and PLAY");
+			Console.WriteLine (" 'S' to increase playback speed, 's' to decrease playback speed");
+			Console.WriteLine (" 'D' to toggle playback direction");
+			Console.WriteLine (" 'N' to move to next frame (in the current direction, better in PAUSE)");
+			Console.WriteLine (" 'Q' to quit");
+
+			// Build the pipeline
+			//Pipeline = Parse.Launch ("playbin uri=http://download.blender.org/durian/trailer/sintel_trailer-1080p.mp4");
+			Pipeline = Parse.Launch ("playbin uri=file:///home/stephan/Downloads/sintel_trailer-1080p.mp4");
+
+			// Start playing
+			var ret = Pipeline.SetState (State.Playing);
+			if (ret == StateChangeReturn.Failure) {
+				Console.WriteLine ("Unable to set the pipeline to the playing state.");
+				return;
+			}
+			Playing = true;
+			Rate = 1.0;
+
+			// Process input
+			HandleKeyboard ();
+
+			// Free resources
+			Pipeline.SetState (State.Null);
+		}
+	}
+}

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
+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
 
 DEBUGS = $(addsuffix .mdb, $(TARGETS))
 assemblies = 					\
@@ -45,6 +45,9 @@ basic-tutorial-9.exe: $(srcdir)/BasicTutorial9.cs $(assemblies)
 basic-tutorial-12.exe: $(srcdir)/BasicTutorial12.cs $(assemblies)
 	$(CSC) $(CSFLAGS) -out:basic-tutorial-12.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/BasicTutorial12.cs
 
+basic-tutorial-13.exe: $(srcdir)/BasicTutorial13.cs $(assemblies)
+	$(CSC) $(CSFLAGS) -out:basic-tutorial-13.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/BasicTutorial13.cs
+
 EXTRA_DIST = 				\
 	Playback.cs \
     VideoOverlay.cs \
@@ -57,4 +60,5 @@ EXTRA_DIST = 				\
     BasicTutorial7.cs \
     BasicTutorial8.cs \
     BasicTutorial9.cs \
-    BasicTutorial12.cs
+    BasicTutorial12.cs \
+    BasicTutorial13.cs