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sample: Add basic tutorial 7 sample

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This commit is contained in:
Stephan Sundermann 2014-08-06 00:58:24 +02:00
parent 6d80e4208a
commit 60f672f209
2 changed files with 86 additions and 2 deletions
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80
samples/BasicTutorial7.cs Normal file
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@ -0,0 +1,80 @@
// 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);
}
}
}

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
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
DEBUGS = $(addsuffix .mdb, $(TARGETS))
assemblies = \
@ -33,6 +33,9 @@ basic-tutorial-5.exe: $(srcdir)/BasicTutorial5.cs $(assemblies)
basic-tutorial-6.exe: $(srcdir)/BasicTutorial6.cs $(assemblies)
$(CSC) $(CSFLAGS) -out:basic-tutorial-6.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/BasicTutorial6.cs
basic-tutorial-7.exe: $(srcdir)/BasicTutorial7.cs $(assemblies)
$(CSC) $(CSFLAGS) -out:basic-tutorial-7.exe $(references) $(GLIB_SHARP_LIBS) $(srcdir)/BasicTutorial7.cs
EXTRA_DIST = \
Playback.cs \
VideoOverlay.cs \
@ -41,4 +44,5 @@ EXTRA_DIST = \
BasicTutorial3.cs \
BasicTutorial4.cs \
BasicTutorial5.cs \
BasicTutorial6.cs
BasicTutorial6.cs \
BasicTutorial7.cs