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sample: Add playback tutorial 2 sample
This commit is contained in:
Stephan Sundermann
parent
86faebc08c
commit
80002cb38f
2 changed files with 191 additions and 2 deletions
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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 basic-tutorial-3.exe basic-tutorial-4.exe basic-tutorial-5.exe basic-tutorial-6.exe basic-tutorial-7.exe basic-tutorial-8.exe basic-tutorial-9.exe basic-tutorial-12.exe basic-tutorial-13.exe playback-tutorial-1.exe
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TARGETS = playback.exe video-overlay.exe basic-tutorial-1.exe basic-tutorial-2.exe basic-tutorial-3.exe basic-tutorial-4.exe basic-tutorial-5.exe basic-tutorial-6.exe basic-tutorial-7.exe basic-tutorial-8.exe basic-tutorial-9.exe basic-tutorial-12.exe basic-tutorial-13.exe playback-tutorial-1.exe playback-tutorial-2.exe
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DEBUGS = $(addsuffix .mdb, $(TARGETS))
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assemblies = \
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@ -51,6 +51,9 @@ basic-tutorial-13.exe: $(srcdir)/BasicTutorial13.cs $(assemblies)
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playback-tutorial-1.exe: $(srcdir)/PlaybackTutorial1.cs $(assemblies)
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$(CSC) $(CSFLAGS) -out:playback-tutorial-1.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/PlaybackTutorial1.cs
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playback-tutorial-2.exe: $(srcdir)/PlaybackTutorial2.cs $(assemblies)
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$(CSC) $(CSFLAGS) -out:playback-tutorial-2.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/PlaybackTutorial2.cs
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EXTRA_DIST = \
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Playback.cs \
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VideoOverlay.cs \
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@ -65,4 +68,5 @@ EXTRA_DIST = \
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BasicTutorial9.cs \
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BasicTutorial12.cs \
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BasicTutorial13.cs \
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PlaybackTutorial1.cs
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PlaybackTutorial1.cs \
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PlaybackTutorial2.cs
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185
samples/PlaybackTutorial2.cs
Normal file
185
samples/PlaybackTutorial2.cs
Normal file
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@ -0,0 +1,185 @@
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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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using System.Runtime.InteropServices;
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namespace GstreamerSharp
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{
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class Playback
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{
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// playbin flags
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static uint Video = (1 << 0); // We want video output
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static uint Audio = (1 << 1); // We want audio output
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static uint Text = (1 << 2); // We want subtitle output
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static Element Playbin;
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static int NAudio, NVideo, NText;
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static int CurrentVideo, CurrentAudio, CurrentText;
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static GLib.MainLoop MainLoop;
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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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Playbin = ElementFactory.Make ("playbin", "playbin");
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if (Playbin == 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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// Set the URI to play
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Playbin ["uri"] = "http://docs.gstreamer.com/media/sintel_trailer-480p.ogv";
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// Set the subtitle URI to play and some font description
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Playbin ["suburi"] = "http://docs.gstreamer.com/media/sintel_trailer_gr.srt";
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Playbin ["subtitle-font-desc"] = "Sans, 18";
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// Set flags to show Audio and Video and Subtitles
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var flags = (uint)Playbin ["flags"];
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flags |= Audio | Video | Text;
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Playbin ["flags"] = flags;
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// Add a bus watch, so we get notified when a message arrives
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var bus = Playbin.Bus;
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bus.AddSignalWatch ();
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bus.Message += HandleMessage;
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// Start playing
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var ret = Playbin.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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// Add a keyboard watch so we get notified of keystrokes
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GLib.Idle.Add (HandleKeyboard);
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MainLoop = new GLib.MainLoop ();
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MainLoop.Run ();
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// Free resources
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Playbin.SetState (State.Null);
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}
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static void HandleMessage (object o, MessageArgs args)
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{
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var msg = args.Message;
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switch (msg.Type) {
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case MessageType.Error:
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GLib.GException err;
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string debug;
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msg.ParseError (out err, out debug);
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Console.WriteLine ("Error received from element {0}: {1}", msg.Src, err.Message);
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Console.WriteLine ("Debugging information: {0}", debug != null ? debug : "none");
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MainLoop.Quit ();
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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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MainLoop.Quit ();
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break;
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case MessageType.StateChanged: {
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State oldState, newState, pendingState;
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msg.ParseStateChanged (out oldState, out newState, out pendingState);
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if (msg.Src == Playbin) {
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if (newState == State.Playing) {
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// Once we are in the playing state, analyze the streams
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AnalyzeStreams ();
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}
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}
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} break;
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default:
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break;
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}
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// We want to keep receiving messages
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args.RetVal = true;
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}
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// Extract some metadata from the streams and print it on the screen
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static void AnalyzeStreams () {
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// Read some properties
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NVideo = (int)Playbin ["n-video"];
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NAudio = (int)Playbin ["n-audio"];
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NText = (int)Playbin ["n-text"];
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Console.WriteLine ("{0} video stream(s), {1} audio stream(s), {2} text stream(s)", NVideo, NAudio, NText);
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Console.WriteLine ();
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for (int i = 0; i < NVideo; i++) {
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// Retrieve the stream's video tags
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var tags = (TagList)Playbin.Emit ("get-video-tags", new object [] { i });
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if (tags != null) {
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Console.WriteLine ("video stream {0}", i);
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string str;
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tags.GetString (Constants.TAG_VIDEO_CODEC, out str);
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Console.WriteLine (" codec: {0}", str != null ? str : "unknown");
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}
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}
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Console.WriteLine ();
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for (int i = 0; i < NAudio; i++) {
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// Retrieve the stream's audio tags
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var tags = (TagList)Playbin.Emit ("get-audio-tags", new object [] { i });
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if (tags != null) {
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Console.WriteLine ("audio stream {0}", i);
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string str;
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if (tags.GetString (Constants.TAG_AUDIO_CODEC, out str)) {
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Console.WriteLine (" codec: {0}", str);
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}
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if (tags.GetString (Constants.TAG_LANGUAGE_CODE, out str)) {
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Console.WriteLine (" language: {0}", str);
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}
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uint rate;
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if (tags.GetUint (Constants.TAG_BITRATE, out rate)) {
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Console.WriteLine (" bitrate: {0}", rate);
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}
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}
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}
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Console.WriteLine ();
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for (int i = 0; i < NText; i++) {
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// Retrieve the stream's subtitle tags
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var tags = (TagList)Playbin.Emit ("get-text-tags", new object [] { i });
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if (tags != null) {
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Console.WriteLine ("subtitle stream {0}", i);
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string str;
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if (tags.GetString (Constants.TAG_LANGUAGE_CODE, out str)) {
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Console.WriteLine (" language: {0}", str);
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}
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}
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}
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CurrentAudio = (int)Playbin ["current-audio"];
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CurrentVideo = (int)Playbin ["current-video"];
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CurrentText = (int)Playbin ["current-text"];
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Console.WriteLine ();
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Console.WriteLine ("Currently playing video stream {0}, audio stream {1} and text stream {2}", CurrentVideo, CurrentAudio, CurrentText);
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Console.WriteLine ("Type any number to select a different subtitle stream");
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}
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// Process keyboard input
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static bool HandleKeyboard () {
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if (Console.KeyAvailable) {
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var key = Console.ReadKey (false);
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if (char.IsDigit (key.KeyChar)) {
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var digit = int.Parse (key.KeyChar.ToString ());
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if (digit < 0 || digit > NText) {
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Console.WriteLine ("Index out of bounds");
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} else {
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// If the input was a valid subtitle stream index, set the current subtitle stream
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Console.WriteLine ("Setting current subtitle stream to {0}", digit);
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Playbin ["current-text"] = digit;
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}
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}
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}
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return true;
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}
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}
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}
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