TSLGenericFilter.OnProcessData

Revision as of 00:10, 26 June 2013

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Description

Use the OnProcessData event handler to write code that responds when a data buffer is received.

Write your custom code to process the data inside the event. The incoming data will be contained inside the InBuffer. You can assign the processed data to the OutBuffer.

You can prevent the output buffer to be sent to the next component by setting SendOutputData to False.

Usually occurs when a new data buffer is generated during data capturing or data playback.

Delphi Example:

// Access the buffer data

procedure TForm1.SLGenericFilter1ProcessData(Sender: TObject;
  InBuffer: ISLBlockBuffer; var OutBuffer: ISLBlockBuffer; var SendOutputData: Boolean);
var
  DataPtr          : Pointer;
  SizeInBytes      : Integer;

begin
  DataPtr := InBuffer.BeginRead();
  SizeInBytes := InBuffer.GetSize();

  // Use DataPtr to access the data.

end;

Visual C++ Example:

// Access the buffer data

void __stdcall CCustomFilterDemoDlg::SLGenericFilter1ProcessData(void *Sender,
      TSLCBlockBuffer InBuffer, TSLCBlockBuffer &OutBuffer,
      bool &SendOutputData)
{
  pData = InBuffer.BeginRead();
  SizeInBytes = InBuffer.GetSize();

  // Use pData to access the data.

}