LEADTOOLS Multimedia (Leadtools.Multimedia assembly)

GetPreferredFilter Method (PlayCtrl)

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Example 



A PreferredFilter enumeration value specifying the desired filter type
Retrieves the preferred filter's Display Name set using the SetPreferredFilter method.
Syntax
'Declaration
 
Public Overridable Function GetPreferredFilter( _
   ByVal filterType As PreferredFilter _
) As String
'Usage
 
Dim instance As PlayCtrl
Dim filterType As PreferredFilter
Dim value As String
 
value = instance.GetPreferredFilter(filterType)
public virtual string GetPreferredFilter( 
   PreferredFilter filterType
)
public:
virtual String^ GetPreferredFilter( 
   PreferredFilter filterType
) 

Parameters

filterType
A PreferredFilter enumeration value specifying the desired filter type

Return Value

A string of a filter's display name.
Remarks
This method can be used to determine whether a preferred filter has been set by SetPreferredFilter. It will return NULL (if no preferred filter has been set) or a display name indicating the preferred filter.

A display name uniquely identifies the filter. Display names have the following format:

@device:sw:GUID\GUID

For example, the display name for the LEAD MPEG2 Transport Demultiplexer is: @device:sw:{083863F1-70DE-11D0-BD40-00A0C911CE86}\{E2B7DF1A-38C5-11D5-91F6-00104BDB8FF9}

A list of display names for common filters can be found in Constants.PreferredFilters.

Please see SetPreferredFilter for more information on filter display names.

Example
Copy Code  
Imports Leadtools
   Imports Leadtools.Multimedia
   Imports LeadtoolsMultimediaExamples.Fixtures

   Public _result As Boolean = False
   Public _form As PlayCtrlForm = New PlayCtrlForm()
   Public Sub PlayerPreferredFiltersExample()
       Try
           ' reference the forms capture control
           Dim playctrl As PlayCtrl = _form.PlayCtrl

           ' set the preferred mpeg2 decoder to the LEAD default (which is the LEAD MPEG2 Decoder)
      playctrl.SetPreferredFilter(PreferredFilter.MPEG2Decompressor, _
                                  Leadtools.Multimedia.Constants.PreferredFilters.LEADDefault)

      ' the default mpeg2 decoder should be the LEAD MPEG2 decoder now
      ' the filter names are not case sensitive, so do ignore the case in the compare
      _result = (String.Compare(playctrl.GetPreferredFilter(PreferredFilter.MPEG2Decompressor), _
                                Leadtools.Multimedia.Constants.PreferredFilters.MPEG2Decompressor, True) = 0)
   Catch e1 As Exception
      _result = False
   End Try
End Sub
using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;

public bool _result = false;
public PlayCtrlForm _form = new PlayCtrlForm();
public void PlayerPreferredFiltersExample()
{
   PlayCtrl playctrl = _form.PlayCtrl;

   try
   {
      // set the preferred mpeg2 decoder to the LEAD default (which is the LEAD MPEG2 Decoder)
      playctrl.SetPreferredFilter(PreferredFilter.MPEG2Decompressor, Constants.PreferredFilters.LEADDefault);

      // the default mpeg2 decoder should be the LEAD MPEG2 decoder now
      // the filter names are not case sensitive, so ignore case in the compare
      _result = (string.Compare(playctrl.GetPreferredFilter(PreferredFilter.MPEG2Decompressor),
                 Constants.PreferredFilters.MPEG2Decompressor, true) == 0);
   }
   catch (Exception)
   {
      _result = false;
   }
}
Requirements

Target Platforms

See Also

Reference

PlayCtrl Class
PlayCtrl Members
SetPreferredFilter Method

 

 


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Leadtools.Multimedia requires a Multimedia or Multimedia Suite license and unlock key. For more information, refer to: LEADTOOLS Toolkit Features