Leadtools.MediaFoundation Namespace > Classes > PlayCtrl > Methods > GetSubObject Method

public virtual object GetSubObject(  
   Leadtools.Mediafoundation.PlayObject objType 
) 

Public Overridable Function GetSubObject( _ 
   ByVal objType As Leadtools.Mediafoundation.PlayObject _ 
) As Object 

public: 
virtual Object^ GetSubObject(  
   Leadtools.Mediafoundation.PlayObject objType 
)  

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:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media"; 
} 

Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As PlayCtrlForm = New PlayCtrlForm() 
Public _playctrl As PlayCtrl = Nothing 
 
Public Sub GetSubObjectExample() 
   ' input and output file names 
   Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_Source.avi") 
 
   Try 
      ' reference the convert control 
      _playctrl = _form.PlayCtrl 
 
      ' get index of LEAD MF Volume Transform 
      Dim nIndex As Integer = _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 
      Dim lmfVolumePro As LMFAVolume = TryCast(_playctrl.GetSubObject(PlayObject.SelAudioProcessor), LMFAVolume) 
 
      If Not lmfVolumePro Is Nothing Then 
         ' change some settings 
         lmfVolumePro.Mute = True 
 
         Marshal.ReleaseComObject(lmfVolumePro) 
      End If 
 
      ' set the source and target files 
      _playctrl.SourceFile = inFile 
 
   Catch e1 As Exception 
      _result = False 
   End Try 
 
   ' 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. 
   Do While _playctrl.State = PlayState.Running 
      Application.DoEvents() 
   Loop 
 
   _result = True 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media" 
End Class 

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Leadtools.MediaFoundation Assembly