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80 lines
3.1 KiB
C#
80 lines
3.1 KiB
C#
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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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public static void Main (string[] args)
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{
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// Initialize Gstreamer
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Gst.Application.Init(ref args);
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// Create the elements
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var audioSource = ElementFactory.Make ("audiotestsrc", "audio_source");
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var tee = ElementFactory.Make ("tee", "tee");
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var audioQueue = ElementFactory.Make ("queue", "audio_queue");
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var audioConvert = ElementFactory.Make ("audioconvert", "audio_convert");
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var audioResample = ElementFactory.Make ("audioresample", "audio_resample");
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var audioSink = ElementFactory.Make ("autoaudiosink", "audio_sink");
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var videoQueue = ElementFactory.Make ("queue", "video_queue");
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var visual = ElementFactory.Make ("wavescope", "visual");
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var videoConvert = ElementFactory.Make ("videoconvert", "csp");
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var videoSink = ElementFactory.Make ("autovideosink", "video_sink");
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// Create the empty pipeline
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var pipeline = new Pipeline ("test-pipeline");
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if (audioSource == null || tee == null || audioQueue == null || audioConvert == null || audioResample == null ||
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audioSink == null || videoQueue == null || visual == null || videoConvert == null || videoSink == null || pipeline == 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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// Link all elements that can be automatically linked because they have "Always" pads
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pipeline.Add (audioSource, tee, audioQueue, audioConvert, audioResample, audioSink,
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videoQueue, visual, videoConvert, videoSink);
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if (!audioSource.Link (tee) ||
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!Element.Link (audioQueue, audioConvert, audioResample, audioSink) ||
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!Element.Link (videoQueue, visual, videoConvert, videoSink)) {
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Console.WriteLine ("Elements could not be linked.");
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return;
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}
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// Manually link the Tee, which has "Request" pads
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var teeSrcPadTemplate = tee.GetPadTemplate ("src_%u");
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var teeAudioPad = tee.RequestPad (teeSrcPadTemplate, null, null);
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Console.WriteLine ("Obtained request pad {0} for audio branch.", teeAudioPad.Name);
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var queueAudioPad = audioQueue.GetStaticPad ("sink");
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var teeVideoPad = tee.RequestPad (teeSrcPadTemplate, null, null);
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Console.WriteLine ("Obtained request pad {0} for video branch.", teeVideoPad.Name);
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var queueVideoPad = videoQueue.GetStaticPad ("sink");
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if (teeAudioPad.Link (queueAudioPad) != PadLinkReturn.Ok ||
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teeVideoPad.Link(queueVideoPad) != PadLinkReturn.Ok) {
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Console.WriteLine ("Tee could not be linked.");
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return;
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}
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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 (check the bus for error messages).");
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}
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// Wait until error or EOS
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pipeline.Bus.TimedPopFiltered (Constants.CLOCK_TIME_NONE, MessageType.Error | MessageType.Eos);
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// Release the request pads from the Tee, and unref them
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tee.ReleaseRequestPad (teeAudioPad);
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tee.ReleaseRequestPad (teeVideoPad);
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// Free resources
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pipeline.SetState (State.Null);
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}
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}
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}
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