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Diffstat (limited to 'samples/BasicTutorial3.cs')
| -rw-r--r-- | samples/BasicTutorial3.cs | 125 |
1 files changed, 125 insertions, 0 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); + } + } +}
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