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147 lines
No EOL
4.1 KiB
C#
147 lines
No EOL
4.1 KiB
C#
// 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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using System.Text;
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namespace GstreamerSharp
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{
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class Playback
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{
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const int GraphLength = 78;
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static uint PlayFlagDownload = (1 << 7); // Enable progressive download (on selected formats)
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static bool IsLive;
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static Element Pipeline;
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static GLib.MainLoop MainLoop;
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static int BufferingLevel;
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static void GotLocation (object sender, GLib.SignalArgs args) {
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var propObject = (Gst.Object)args.Args [0];
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var location = (string) propObject["temp-location"];
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Console.WriteLine ("Temporary file: {0}", location);
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// Uncomment this line to keep the temporary file after the program exits
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// g_object_set (G_OBJECT (prop_object), "temp-remove", FALSE, NULL);
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}
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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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BufferingLevel = 100;
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// Build the pipeline
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Pipeline = Parse.Launch ("playbin uri=http://freedesktop.org/software/gstreamer-sdk/data/media/sintel_trailer-480p.webm");
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var bus = Pipeline.Bus;
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// Set the download flag
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var flags = (uint)Pipeline ["flags"];
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flags |= PlayFlagDownload;
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Pipeline ["flags"] = flags;
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// Uncomment this line to limit the amount of downloaded data
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// g_object_set (pipeline, "ring-buffer-max-size", (guint64)4000000, NULL);
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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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} else if (ret == StateChangeReturn.NoPreroll) {
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IsLive = true;
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}
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MainLoop = new GLib.MainLoop ();
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bus.AddSignalWatch ();
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bus.Message += HandleMessage;
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Pipeline.Connect ("deep-notify::temp-location", GotLocation);
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// Register a function that GLib will call every second
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GLib.Timeout.AddSeconds (1, RefreshUI);
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MainLoop.Run ();
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// Free resources
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Pipeline.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: {0}", err.Message);
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Pipeline.SetState (State.Ready);
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MainLoop.Quit ();
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break;
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}
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case MessageType.Eos:
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// end-of-stream
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Pipeline.SetState (State.Ready);
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MainLoop.Quit ();
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break;
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case MessageType.Buffering: {
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int percent = 0;
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// If the stream is live, we do not care about buffering.
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if (IsLive) break;
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percent = msg.ParseBuffering ();
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// Wait until buffering is complete before start/resume playing
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if (percent < 100)
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Pipeline.SetState (State.Paused);
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else
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Pipeline.SetState (State.Playing);
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break;
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}
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case MessageType.ClockLost:
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// Get a new clock
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Pipeline.SetState (State.Paused);
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Pipeline.SetState (State.Playing);
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break;
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default:
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// Unhandled message
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break;
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}
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}
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static bool RefreshUI () {
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var query = new Query (Format.Percent);
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if (Pipeline.Query (query)) {
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var graph = new StringBuilder (GraphLength);
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long position = 0, duration = 0;
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var nRanges = query.NBufferingRanges;
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for (uint range = 0; range < nRanges; range++) {
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long start, stop;
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query.ParseNthBufferingRange (range, out start, out stop);
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start = start * GraphLength / (stop - start);
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stop = stop * GraphLength / (stop - start);
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for (int i = (int)start; i < stop; i++)
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graph.Insert (i, '-');
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}
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if (Pipeline.QueryPosition (Format.Time, out position) && position >= 0
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&& Pipeline.QueryDuration (Format.Time, out duration) && duration >= 0) {
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var i = (int)(GraphLength * (double)position / (double)(duration + 1));
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graph [i] = BufferingLevel < 100 ? 'X' : '>';
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}
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Console.WriteLine ("[{0}]", graph);
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if (BufferingLevel < 100) {
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Console.WriteLine (" Buffering: {0}", BufferingLevel);
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} else {
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Console.WriteLine (" ");
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}
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Console.WriteLine ();
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}
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return true;
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}
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}
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} |