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sample: Add playback tutorial 4 sample

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This commit is contained in:
Stephan Sundermann 2014-08-08 17:02:10 +02:00
parent 85143214ac
commit 531c90cde2
2 changed files with 153 additions and 2 deletions
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8
samples/Makefile.am
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@ -1,4 +1,4 @@
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 playback-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 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 playback-tutorial-3.exe playback-tutorial-4.exe
DEBUGS = $(addsuffix .mdb, $(TARGETS))
assemblies = \
@ -57,6 +57,9 @@ playback-tutorial-2.exe: $(srcdir)/PlaybackTutorial2.cs $(assemblies)
playback-tutorial-3.exe: $(srcdir)/PlaybackTutorial3.cs $(assemblies)
$(CSC) $(CSFLAGS) -out:playback-tutorial-3.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/PlaybackTutorial3.cs
playback-tutorial-4.exe: $(srcdir)/PlaybackTutorial4.cs $(assemblies)
$(CSC) $(CSFLAGS) -out:playback-tutorial-4.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/PlaybackTutorial4.cs
EXTRA_DIST = \
Playback.cs \
VideoOverlay.cs \
@ -73,4 +76,5 @@ EXTRA_DIST = \
BasicTutorial13.cs \
PlaybackTutorial1.cs \
PlaybackTutorial2.cs \
PlaybackTutorial3.cs
PlaybackTutorial3.cs \
PlaybackTutorial4.cs

147
samples/PlaybackTutorial4.cs Normal file
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@ -0,0 +1,147 @@
// Authors
// Copyright (C) 2014 Stephan Sundermann <stephansundermann@gmail.com>
using System;
using Gst;
using System.Runtime.InteropServices;
using System.Text;
namespace GstreamerSharp
{
class Playback
{
const int GraphLength = 78;
static uint PlayFlagDownload = (1 << 7); // Enable progressive download (on selected formats)
static bool IsLive;
static Element Pipeline;
static GLib.MainLoop MainLoop;
static int BufferingLevel;
static void GotLocation (object sender, GLib.SignalArgs args) {
var propObject = (Gst.Object)args.Args [0];
var location = (string) propObject["temp-location"];
Console.WriteLine ("Temporary file: {0}", location);
// Uncomment this line to keep the temporary file after the program exits
// g_object_set (G_OBJECT (prop_object), "temp-remove", FALSE, NULL);
}
public static void Main (string[] args)
{
// Initialize GStreamer
Application.Init (ref args);
BufferingLevel = 100;
// Build the pipeline
Pipeline = Parse.Launch ("playbin uri=http://docs.gstreamer.com/media/sintel_trailer-480p.webm");
var bus = Pipeline.Bus;
// Set the download flag
var flags = (uint)Pipeline ["flags"];
flags |= PlayFlagDownload;
Pipeline ["flags"] = flags;
// Uncomment this line to limit the amount of downloaded data
// g_object_set (pipeline, "ring-buffer-max-size", (guint64)4000000, NULL);
// Start playing
var ret = Pipeline.SetState (State.Playing);
if (ret == StateChangeReturn.Failure) {
Console.WriteLine ("Unable to set the pipeline to the playing state.");
return;
} else if (ret == StateChangeReturn.NoPreroll) {
IsLive = true;
}
MainLoop = new GLib.MainLoop ();
bus.AddSignalWatch ();
bus.Message += HandleMessage;
Pipeline.Connect ("deep-notify::temp-location", GotLocation);
// Register a function that GLib will call every second
GLib.Timeout.AddSeconds (1, RefreshUI);
MainLoop.Run ();
// Free resources
Pipeline.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: {0}", err.Message);
Pipeline.SetState (State.Ready);
MainLoop.Quit ();
break;
}
case MessageType.Eos:
// end-of-stream
Pipeline.SetState (State.Ready);
MainLoop.Quit ();
break;
case MessageType.Buffering: {
int percent = 0;
// If the stream is live, we do not care about buffering.
if (IsLive) break;
percent = msg.ParseBuffering ();
// Wait until buffering is complete before start/resume playing
if (percent < 100)
Pipeline.SetState (State.Paused);
else
Pipeline.SetState (State.Playing);
break;
}
case MessageType.ClockLost:
// Get a new clock
Pipeline.SetState (State.Paused);
Pipeline.SetState (State.Playing);
break;
default:
// Unhandled message
break;
}
}
static bool RefreshUI () {
var query = new Query (Format.Percent);
if (Pipeline.Query (query)) {
var graph = new StringBuilder (GraphLength);
long position = 0, duration = 0;
var nRanges = query.NBufferingRanges;
for (uint range = 0; range < nRanges; range++) {
long start, stop;
query.ParseNthBufferingRange (range, out start, out stop);
start = start * GraphLength / (stop - start);
stop = stop * GraphLength / (stop - start);
for (int i = (int)start; i < stop; i++)
graph.Insert (i, '-');
}
if (Pipeline.QueryPosition (Format.Time, out position) && position >= 0
&& Pipeline.QueryDuration (Format.Time, out duration) && duration >= 0) {
var i = (int)(GraphLength * (double)position / (double)(duration + 1));
graph [i] = BufferingLevel < 100 ? 'X' : '>';
}
Console.WriteLine ("[{0}]", graph);
if (BufferingLevel < 100) {
Console.WriteLine (" Buffering: {0}", BufferingLevel);
} else {
Console.WriteLine (" ");
}
Console.WriteLine ();
}
return true;
}
}
}