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Diffstat (limited to 'samples/PlaybackTutorial2.cs')
| -rw-r--r-- | samples/PlaybackTutorial2.cs | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/samples/PlaybackTutorial2.cs b/samples/PlaybackTutorial2.cs new file mode 100644 index 0000000..8cc347b --- /dev/null +++ b/samples/PlaybackTutorial2.cs @@ -0,0 +1,185 @@ +// Authors +// Copyright (C) 2014 Stephan Sundermann <stephansundermann@gmail.com> + +using System; +using Gst; +using System.Runtime.InteropServices; + +namespace GstreamerSharp +{ + class Playback + { + // playbin flags + static uint Video = (1 << 0); // We want video output + static uint Audio = (1 << 1); // We want audio output + static uint Text = (1 << 2); // We want subtitle output + + static Element Playbin; + static int NAudio, NVideo, NText; + static int CurrentVideo, CurrentAudio, CurrentText; + static GLib.MainLoop MainLoop; + + 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://docs.gstreamer.com/media/sintel_trailer-480p.ogv"; + + // Set the subtitle URI to play and some font description + Playbin ["suburi"] = "http://docs.gstreamer.com/media/sintel_trailer_gr.srt"; + Playbin ["subtitle-font-desc"] = "Sans, 18"; + + // Set flags to show Audio and Video and Subtitles + var flags = (uint)Playbin ["flags"]; + flags |= Audio | Video | Text; + Playbin ["flags"] = flags; + + // Add a bus watch, so we get notified when a message arrives + var bus = Playbin.Bus; + bus.AddSignalWatch (); + bus.Message += HandleMessage; + + // Start playing + var ret = Playbin.SetState (State.Playing); + if (ret == StateChangeReturn.Failure) { + Console.WriteLine ("Unable to set the pipeline to the playing state."); + return; + } + + // Add a keyboard watch so we get notified of keystrokes + GLib.Idle.Add (HandleKeyboard); + MainLoop = new GLib.MainLoop (); + MainLoop.Run (); + + // Free resources + Playbin.SetState (State.Null); + } + + static void HandleMessage (object o, MessageArgs args) + { + var msg = args.Message; + switch (msg.Type) { + case MessageType.Error: + GLib.GException err; + string debug; + msg.ParseError (out err, out debug); + Console.WriteLine ("Error received from element {0}: {1}", msg.Src, err.Message); + Console.WriteLine ("Debugging information: {0}", debug != null ? debug : "none"); + MainLoop.Quit (); + break; + case MessageType.Eos: + Console.WriteLine ("End-Of-Stream reached."); + MainLoop.Quit (); + break; + case MessageType.StateChanged: { + State oldState, newState, pendingState; + msg.ParseStateChanged (out oldState, out newState, out pendingState); + if (msg.Src == Playbin) { + if (newState == State.Playing) { + // Once we are in the playing state, analyze the streams + AnalyzeStreams (); + } + } + } break; + default: + break; + } + + // We want to keep receiving messages + args.RetVal = true; + } + + // Extract some metadata from the streams and print it on the screen + static void AnalyzeStreams () { + // Read some properties + NVideo = (int)Playbin ["n-video"]; + NAudio = (int)Playbin ["n-audio"]; + NText = (int)Playbin ["n-text"]; + + Console.WriteLine ("{0} video stream(s), {1} audio stream(s), {2} text stream(s)", NVideo, NAudio, NText); + + Console.WriteLine (); + for (int i = 0; i < NVideo; i++) { + // Retrieve the stream's video tags + var tags = (TagList)Playbin.Emit ("get-video-tags", new object [] { i }); + if (tags != null) { + Console.WriteLine ("video stream {0}", i); + string str; + tags.GetString (Constants.TAG_VIDEO_CODEC, out str); + Console.WriteLine (" codec: {0}", str != null ? str : "unknown"); + } + } + + Console.WriteLine (); + for (int i = 0; i < NAudio; i++) { + // Retrieve the stream's audio tags + var tags = (TagList)Playbin.Emit ("get-audio-tags", new object [] { i }); + if (tags != null) { + Console.WriteLine ("audio stream {0}", i); + string str; + if (tags.GetString (Constants.TAG_AUDIO_CODEC, out str)) { + Console.WriteLine (" codec: {0}", str); + } + if (tags.GetString (Constants.TAG_LANGUAGE_CODE, out str)) { + Console.WriteLine (" language: {0}", str); + } + uint rate; + if (tags.GetUint (Constants.TAG_BITRATE, out rate)) { + Console.WriteLine (" bitrate: {0}", rate); + } + } + } + + Console.WriteLine (); + for (int i = 0; i < NText; i++) { + // Retrieve the stream's subtitle tags + var tags = (TagList)Playbin.Emit ("get-text-tags", new object [] { i }); + if (tags != null) { + Console.WriteLine ("subtitle stream {0}", i); + string str; + if (tags.GetString (Constants.TAG_LANGUAGE_CODE, out str)) { + Console.WriteLine (" language: {0}", str); + } + } + } + + CurrentAudio = (int)Playbin ["current-audio"]; + CurrentVideo = (int)Playbin ["current-video"]; + CurrentText = (int)Playbin ["current-text"]; + + Console.WriteLine (); + Console.WriteLine ("Currently playing video stream {0}, audio stream {1} and text stream {2}", CurrentVideo, CurrentAudio, CurrentText); + Console.WriteLine ("Type any number to select a different subtitle stream"); + } + + // Process keyboard input + static bool HandleKeyboard () { + if (Console.KeyAvailable) { + var key = Console.ReadKey (false); + + if (char.IsDigit (key.KeyChar)) { + var digit = int.Parse (key.KeyChar.ToString ()); + + if (digit < 0 || digit > NText) { + Console.WriteLine ("Index out of bounds"); + } else { + // If the input was a valid subtitle stream index, set the current subtitle stream + Console.WriteLine ("Setting current subtitle stream to {0}", digit); + Playbin ["current-text"] = digit; + } + } + } + return true; + } + } +}
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