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sample: Add basic tutorial 3 sample
This commit is contained in:
Stephan Sundermann
parent
c5216c0bc3
commit
68ae950ff7
2 changed files with 131 additions and 2 deletions
125
samples/BasicTutorial3.cs
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125
samples/BasicTutorial3.cs
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// Authors
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// Copyright (C) 2014 Stephan Sundermann <stephansundermann@gmail.com>
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using System;
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using Gst;
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namespace GstreamerSharp
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{
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class Playback
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{
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static Pipeline pipeline;
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static Element source;
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static Element convert;
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static Element sink;
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public static void Main (string[] args)
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{
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// Initialize Gstreamer
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Application.Init(ref args);
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// Create the elements
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source = ElementFactory.Make ("uridecodebin", "source");
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convert = ElementFactory.Make ("audioconvert", "convert");
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sink = ElementFactory.Make ("autoaudiosink", "sink");
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// Create the empty pipeline
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pipeline = new Pipeline ("test-pipeline");
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if (source == null || convert == null || sink == null || pipeline == null) {
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Console.WriteLine ("Not all elements could be created");
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return;
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}
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// Build the pipeline. Note that we are NOT linking the source at this point.
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// We will do it later.
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pipeline.Add (source, convert, sink);
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if (!convert.Link (sink)) {
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Console.WriteLine ("Elements could not be linked");
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return;
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}
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// Set the URI to play
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source ["uri"] = "http://download.blender.org/durian/trailer/sintel_trailer-1080p.mp4";
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// Connect to the pad-added signal
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source.PadAdded += HandlePadAdded;
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// Start playing
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var ret = pipeline.SetState (State.Playing);
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if (ret == StateChangeReturn.Failure) {
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Console.WriteLine ("Unable to set the pipeline to the playing state.");
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return;
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}
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// Listen to the bus
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var bus = pipeline.Bus;
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bool terminated = false;
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do {
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var msg = bus.TimedPopFiltered (Constants.CLOCK_TIME_NONE, MessageType.StateChanged | MessageType.Error | MessageType.Eos);
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if (msg != null) {
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switch (msg.Type) {
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case MessageType.Error:
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string debug;
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GLib.GException exc;
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msg.ParseError (out exc, out debug);
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Console.WriteLine (string.Format ("Error received from element {0}: {1}", msg.Src.Name, exc.Message));
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Console.WriteLine ("Debugging information: {0}", debug);
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terminated = true;
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break;
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case MessageType.Eos:
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Console.WriteLine("End-Of-Stream reached.");
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terminated = true;
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break;
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case MessageType.StateChanged:
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// We are only interested in state-changed messages from the pipeline
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if (msg.Src == pipeline) {
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State oldState, newState, pendingState;
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msg.ParseStateChanged(out oldState, out newState, out pendingState);
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Console.WriteLine ("Pipeline state changed from {0} to {1}:", Element.StateGetName(oldState), Element.StateGetName(newState));
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}
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break;
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default:
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// We should not reach here
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Console.WriteLine ("Unexpected message received.");
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break;
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}
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}
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} while (!terminated);
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pipeline.SetState (State.Null);
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}
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static void HandlePadAdded (object o, PadAddedArgs args)
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{
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var src = (Element)o;
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var newPad = args.NewPad;
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var sinkPad = convert.GetStaticPad ("sink");
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Console.WriteLine (string.Format ("Received new pad '{0}' from '{1}':", newPad.Name, src.Name));
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// If our converter is already linked, we have nothing to do here
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if (sinkPad.IsLinked) {
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Console.WriteLine ("We are already linked. Ignoring.");
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return;
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}
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// Check the new pad's type
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var newPadCaps = newPad.Caps;
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var newPadStruct = newPadCaps.GetStructure (0);
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var newPadType = newPadStruct.Name;
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if (!newPadType.StartsWith ("audio/x-raw")) {
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Console.WriteLine ("It has type '{0}' which is not raw audio. Ignoring.", newPadType);
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return;
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}
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// Attempt the link
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var ret = newPad.Link (sinkPad);
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if (ret != PadLinkReturn.Ok)
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Console.WriteLine ("Type is '{0} but link failed.", newPadType);
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else
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Console.WriteLine ("Link succeeded (type '{0}').", newPadType);
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}
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}
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}
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@ -1,4 +1,4 @@
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TARGETS = playback.exe video-overlay.exe basic-tutorial-1.exe basic-tutorial-2.exe
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TARGETS = playback.exe video-overlay.exe basic-tutorial-1.exe basic-tutorial-2.exe basic-tutorial-3.exe
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DEBUGS = $(addsuffix .mdb, $(TARGETS))
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assemblies = \
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@ -21,8 +21,12 @@ basic-tutorial-1.exe: $(srcdir)/BasicTutorial1.cs $(assemblies)
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basic-tutorial-2.exe: $(srcdir)/BasicTutorial2.cs $(assemblies)
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$(CSC) $(CSFLAGS) -out:basic-tutorial-2.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/BasicTutorial2.cs
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basic-tutorial-3.exe: $(srcdir)/BasicTutorial3.cs $(assemblies)
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$(CSC) $(CSFLAGS) -out:basic-tutorial-3.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/BasicTutorial3.cs
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EXTRA_DIST = \
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Playback.cs \
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VideoOverlay.cs \
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BasicTutorial1.cs \
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BasicTutorial2.cs
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BasicTutorial2.cs \
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BasicTutorial3.cs
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