// This function is called when playbin has created the appsrc element, so we have a chance to configure it.
static void SourceSetup (object sender, GLib.SignalArgs args) {
var info = new Gst.Audio.AudioInfo ();
var source = new Gst.App.AppSrc(((Element)args.Args [0]).Handle);
Console.WriteLine ("Source has been created. Configuring.");
AppSource = source;
// Configure appsrc
Gst.Audio.AudioChannelPosition[] position = {};
info.SetFormat (Gst.Audio.AudioFormat.S16, SampleRate, 1, position);
var audioCaps = info.ToCaps ();
source ["caps"] = audioCaps;
source ["format"] = Format.Time;
source.NeedData += StartFeed;
source.EnoughData += StopFeed;
}
public static void Main(string[] args)
{
b = 1;
d = 1;
Gst.Audio.AudioInfo info = new Gst.Audio.AudioInfo();
// Initialize Gstreamer
Gst.Application.Init(ref args);
// Create the elements
AppSource = new Gst.App.AppSrc("app_src");
Tee = ElementFactory.Make("tee", "tee");
AudioQueue = ElementFactory.Make("queue", "audio_queue");
AudioConvert1 = ElementFactory.Make("audioconvert", "audio_convert1");
AudioResample = ElementFactory.Make("audioresample", "audio_resample");
AudioSink = ElementFactory.Make("autoaudiosink", "audio_sink");
VideoQueue = ElementFactory.Make("queue", "video_queue");
AudioConvert2 = ElementFactory.Make("audioconvert", "audio_convert2");
Visual = ElementFactory.Make("wavescope", "visual");
VideoConvert = ElementFactory.Make("videoconvert", "video_convert");
VideoSink = ElementFactory.Make("autovideosink", "video_sink");
AppQueue = ElementFactory.Make("queue", "app_queue");
AppSink = new Gst.App.AppSink("app_sink");
// Create the empty pipeline
var pipeline = new Pipeline("test-pipeline");
if (AppSource == null || Tee == null || AudioQueue == null || AudioConvert1 == null || AudioResample == null ||
AudioSink == null || VideoQueue == null || AudioConvert2 == null || Visual == null || VideoConvert == null ||
AppQueue == null || AppSink == null || pipeline == null)
{
Console.WriteLine("Not all elements could be created.");
return;
}
// Configure wavescope
Visual ["shader"] = 0;
Visual ["style"] = 0;
// Configure appsrc
info.SetFormat(Gst.Audio.AudioFormat.S16, SampleRate, 1, (Gst.Audio.AudioChannelPosition) 0);
var audioCaps = info.ToCaps();
AppSource ["caps"] = audioCaps;
AppSource ["format"] = Format.Time;
AppSource.NeedData += StartFeed;
AppSource.EnoughData += StopFeed;
// Configure appsink
AppSink ["emit-signals"] = true;
AppSink ["caps"] = audioCaps;
AppSink.NewSample += NewSample;
// Link all elements that can be automatically linked because they have "Always" pads
pipeline.Add(AppSource, Tee, AudioQueue, AudioConvert1, AudioResample,
AudioSink, VideoQueue, AudioConvert2, Visual, VideoConvert, VideoSink, AppQueue, AppSink);
if (!Element.Link(AppSource, Tee) ||
!Element.Link(AudioQueue, AudioConvert1, AudioResample, AudioSink) ||
!Element.Link(VideoQueue, AudioConvert2, Visual, VideoConvert, VideoSink) ||
!Element.Link(AppQueue, AppSink))
{
Console.WriteLine("Elements could not be linked.");
return;
}
// Manually link the Tee, which has "Request" pads
var teeSrcPadTemplate = Tee.GetPadTemplate("src_%u");
var teeAudioPad = Tee.RequestPad(teeSrcPadTemplate);
Console.WriteLine("Obtained request pad {0} for audio branch.", teeAudioPad.Name);
var queueAudioPad = AudioQueue.GetStaticPad("sink");
var teeVideoPad = Tee.RequestPad(teeSrcPadTemplate);
Console.WriteLine("Obtained request pad {0} for video branch.", teeVideoPad.Name);
var queueVideoPad = VideoQueue.GetStaticPad("sink");
var teeAppPad = Tee.RequestPad(teeSrcPadTemplate);
Console.WriteLine("Obtained request pad {0} for app branch.", teeAppPad.Name);
var queueAppPad = AppQueue.GetStaticPad("sink");
if (teeAudioPad.Link(queueAudioPad) != PadLinkReturn.Ok ||
teeVideoPad.Link(queueVideoPad) != PadLinkReturn.Ok ||
teeAppPad.Link(queueAppPad) != PadLinkReturn.Ok)
{
Console.WriteLine("Tee could not be linked");
return;
}
// Instruct the bus to emit signals for each received message, and connect to the interesting signals
var bus = pipeline.Bus;
bus.AddSignalWatch();
bus.Connect("message::error", HandleError);
// Start playing the pipeline
pipeline.SetState(State.Playing);
// Create a GLib Main Loop and set it to run
MainLoop = new GLib.MainLoop();
MainLoop.Run();
// Release the request pads from the Tee, and unref them
Tee.ReleaseRequestPad(teeAudioPad);
Tee.ReleaseRequestPad(teeVideoPad);
Tee.ReleaseRequestPad(teeAppPad);
// Free resources
pipeline.SetState(State.Null);
Gst.Global.Deinit();
}