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GetSubObject Method

Summary

Gets the specified topology object.

Syntax

C++/CLI

public virtual object GetSubObject( 
   PlayObject objType 
)

public: 
virtual Object^ GetSubObject(  
   PlayObject objType 
)

Parameters

objType
A PlayObject enumeration value that specifies which topology object to retrieve.

Return Value

An object representing the specified topology object.

Remarks

If the method fails, an error is raised. For more information, refer to the Error Codes.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
 
public bool _result = false; 
public PlayCtrlForm _form = new PlayCtrlForm(); 
public PlayCtrl _playctrl = null; 
 
public void GetSubObjectExample() 
{ 
   // input and output file names 
   string inFile = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_Source.avi"); 
 
   try 
   { 
      // reference the convert control 
      _playctrl = _form.PlayCtrl; 
 
      // get index of LEAD MF Volume Transform 
      int nIndex = _playctrl.AudioProcessors.IndexOf("{E2B7DC41-38C5-11D5-91F6-00104BDB8FF9}"); 
 
      // add the LEAD MF Volume Transform to the selected audio processors 
      _playctrl.SelectedAudioProcessors.Add(_playctrl.AudioProcessors[nIndex]); 
 
      // access the processor directly 
      // LMFAVolume lmfVolumePro = _playctrl.GetSubObject(PlayObject.SelAudioProcessor) as LMFAVolume; 
      // if (lmfVolumePro != null) 
      // { 
      //    change some settings 
      //    lmfVolumePro.Mute = true; 
      //    Marshal.ReleaseComObject(lmfVolumePro); 
      // } 
 
      // set the source file 
      _playctrl.SourceFile = inFile; 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
 
   // we'll loop on the state and pump messages for this example. 
   // but you should not need to if running from a Windows Forms application. 
   while (_playctrl.State == PlayState.Running) 
      Application.DoEvents(); 
 
   _result = true; 
} 
 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\LEADTOOLS22\Media"; 
}

Requirements

Target Platforms

Reference

PlayCtrl Class

PlayCtrl Members

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Help Version 22.0.2022.12.7

Leadtools.MediaFoundation Assembly

Introduction

Getting Started

Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies