diff options
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/BasicTutorial4.cs | 136 | ||||
| -rw-r--r-- | samples/Makefile.am | 8 |
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 |