mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-05 16:06:43 +00:00
80 lines
No EOL
3.1 KiB
C#
80 lines
No EOL
3.1 KiB
C#
// Authors
|
|
// Copyright (C) 2014 Stephan Sundermann <stephansundermann@gmail.com>
|
|
|
|
using System;
|
|
using Gst;
|
|
using System.Runtime.InteropServices;
|
|
|
|
namespace GstreamerSharp
|
|
{
|
|
class Playback
|
|
{
|
|
public static void Main (string[] args)
|
|
{
|
|
// Initialize Gstreamer
|
|
Gst.Application.Init(ref args);
|
|
|
|
// Create the elements
|
|
var audioSource = ElementFactory.Make ("audiotestsrc", "audio_source");
|
|
var tee = ElementFactory.Make ("tee", "tee");
|
|
var audioQueue = ElementFactory.Make ("queue", "audio_queue");
|
|
var audioConvert = ElementFactory.Make ("audioconvert", "audio_convert");
|
|
var audioResample = ElementFactory.Make ("audioresample", "audio_resample");
|
|
var audioSink = ElementFactory.Make ("autoaudiosink", "audio_sink");
|
|
var videoQueue = ElementFactory.Make ("queue", "video_queue");
|
|
var visual = ElementFactory.Make ("wavescope", "visual");
|
|
var videoConvert = ElementFactory.Make ("videoconvert", "csp");
|
|
var videoSink = ElementFactory.Make ("autovideosink", "video_sink");
|
|
|
|
// Create the empty pipeline
|
|
var pipeline = new Pipeline ("test-pipeline");
|
|
|
|
if (audioSource == null || tee == null || audioQueue == null || audioConvert == null || audioResample == null ||
|
|
audioSink == null || videoQueue == null || visual == null || videoConvert == null || videoSink == null || pipeline == null) {
|
|
Console.WriteLine ("Not all elements could be created.");
|
|
return;
|
|
}
|
|
|
|
|
|
// Link all elements that can be automatically linked because they have "Always" pads
|
|
pipeline.Add (audioSource, tee, audioQueue, audioConvert, audioResample, audioSink,
|
|
videoQueue, visual, videoConvert, videoSink);
|
|
if (!audioSource.Link (tee) ||
|
|
!Element.Link (audioQueue, audioConvert, audioResample, audioSink) ||
|
|
!Element.Link (videoQueue, visual, videoConvert, videoSink)) {
|
|
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, null, null);
|
|
Console.WriteLine ("Obtained request pad {0} for audio branch.", teeAudioPad.Name);
|
|
var queueAudioPad = audioQueue.GetStaticPad ("sink");
|
|
var teeVideoPad = tee.RequestPad (teeSrcPadTemplate, null, null);
|
|
Console.WriteLine ("Obtained request pad {0} for video branch.", teeVideoPad.Name);
|
|
var queueVideoPad = videoQueue.GetStaticPad ("sink");
|
|
if (teeAudioPad.Link (queueAudioPad) != PadLinkReturn.Ok ||
|
|
teeVideoPad.Link(queueVideoPad) != PadLinkReturn.Ok) {
|
|
Console.WriteLine ("Tee could not be linked.");
|
|
return;
|
|
}
|
|
|
|
// Start playing
|
|
var ret = pipeline.SetState (State.Playing);
|
|
if (ret == StateChangeReturn.Failure) {
|
|
Console.WriteLine ("Unable to set the pipeline to the playing state (check the bus for error messages).");
|
|
}
|
|
|
|
// Wait until error or EOS
|
|
pipeline.Bus.TimedPopFiltered (Constants.CLOCK_TIME_NONE, MessageType.Error | MessageType.Eos);
|
|
|
|
// Release the request pads from the Tee, and unref them
|
|
tee.ReleaseRequestPad (teeAudioPad);
|
|
tee.ReleaseRequestPad (teeVideoPad);
|
|
|
|
// Free resources
|
|
pipeline.SetState (State.Null);
|
|
}
|
|
}
|
|
} |