subprojects/gstreamer-sharp/samples/BasicTutorial12.cs

   1 // Authors
   2 //   Copyright (C) 2014 Stephan Sundermann <stephansundermann@gmail.com>
   3
   4 using System;
   5 using Gst;
   6 using System.Runtime.InteropServices;
   7
   8 namespace GstreamerSharp
   9 {
  10         class Playback
  11         {
  12                 static bool IsLive;
  13                 static Element Pipeline;
  14                 static GLib.MainLoop MainLoop;
  15
  16                 public static void Main (string[] args)
  17                 {
  18                         // Initialize GStreamer
  19                         Application.Init (ref args);
  20
  21                         // Build the pipeline
  22                         Pipeline = Parse.Launch ("playbin uri=http://download.blender.org/durian/trailer/sintel_trailer-1080p.mp4");
  23                         var bus = Pipeline.Bus;
  24
  25                         // Start playing
  26                         var ret = Pipeline.SetState (State.Playing);
  27                         if (ret == StateChangeReturn.Failure) {
  28                                 Console.WriteLine ("Unable to set the pipeline to the playing state.");
  29                                 return;
  30                         } else if (ret == StateChangeReturn.NoPreroll) {
  31                                 IsLive = true;
  32                         }
  33
  34                         MainLoop = new GLib.MainLoop ();
  35
  36                         bus.AddSignalWatch ();
  37                         bus.Message += HandleMessage;
  38
  39                         MainLoop.Run ();
  40
  41                         // Free resources
  42                         Pipeline.SetState (State.Null);
  43                 }
  44
  45                 static void HandleMessage (object o, MessageArgs args)
  46                 {
  47                         var msg = args.Message;
  48                         switch (msg.Type) {
  49                         case MessageType.Error: {
  50                                         GLib.GException err;
  51                                         string debug;
  52
  53                                         msg.ParseError (out err, out debug);
  54                                         Console.WriteLine ("Error: {0}", err.Message);
  55
  56                                         Pipeline.SetState (State.Ready);
  57                                         MainLoop.Quit ();
  58                                         break;
  59                                 }
  60                         case MessageType.Eos:
  61                                 // end-of-stream
  62                                 Pipeline.SetState (State.Ready);
  63                                 MainLoop.Quit ();
  64                                 break;
  65                         case MessageType.Buffering: {
  66                                         int percent = 0;
  67
  68                                         // If the stream is live, we do not care about buffering.
  69                                         if (IsLive) break;
  70
  71                                         percent = msg.ParseBuffering ();
  72                                         Console.WriteLine ("Buffering ({0})", percent);
  73                                         // Wait until buffering is complete before start/resume playing
  74                                         if (percent < 100)
  75                                                 Pipeline.SetState (State.Paused);
  76                                         else
  77                                                 Pipeline.SetState (State.Playing);
  78                                         break;
  79                                 }
  80                         case MessageType.ClockLost:
  81                                 // Get a new clock
  82                                 Pipeline.SetState (State.Paused);
  83                                 Pipeline.SetState (State.Playing);
  84                                 break;
  85                         default:
  86                                 // Unhandled message
  87                                 break;
  88                         }
  89                 }
  90         }
  91 }