GetSubObject Method

C#
Visual Basic
Objective-C
Java
C++

public virtual object GetSubObject( 
   PlayObject objType
)

'Declaration

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

'Usage

Dim instance As PlayCtrl
Dim objType As PlayObject
Dim value As Object
 
value = instance.GetSubObject(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.

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

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

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

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";
}

Target Platforms

Reference

PlayCtrl Class
PlayCtrl Members