Event VLGenericFilter.TVLGenericFilter.OnProcessData
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Class: TVLGenericFilter
Contents |
Syntax
Delphi:
property OnProcessData : TVLProcessVideoNotify read FOnProcessData write SetOnProcessData;
C++ Builder:
__property TVLProcessVideoNotify OnProcessData = { read=FOnProcessData, write=SetOnProcessData };
Summary
Occurs when a video frame is received.
Description
Use the OnProcessData event handler to write code that
responds when a video frame is received.
Write your custom code to process the video data inside the event. The incoming image will be contained inside the InBuffer. You can assign the processed image 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 frame is generated during video capturing or video playback. Example Delphi Example :
procedure TForm1.VLGenericFilter2ProcessData(Sender: TObject; InBuffer: IVLImageBuffer; var OutBuffer: IVLImageBuffer; var SendOutputData: Boolean); var X, Y : Integer; begin for X := 0 to OutBuffer.Width - 1 do for Y := 0 to OutBuffer.Height - 1 do begin OutBuffer.Red[ X, Y ] := InBuffer.Blue[ X, Y ] + 10; OutBuffer.Green[ X, Y ] := InBuffer.Red[ X, Y ] + 6; OutBuffer.Blue[ X, Y ] := InBuffer.Green[ X, Y ] + 2; end; end;
C++ Builder Example:
void __fastcall TForm1::VLGenericFilter2ProcessData(TObject *Sender,
TVLCVideoBuffer InBuffer, TVLCVideoBuffer &OutBuffer,
bool &SendOutputData)
{
for ( int x = 0; x < OutBuffer.GetWidth(); x ++ )
for ( int y = 0; y < OutBuffer.GetHeight(); y ++ )
{
OutBuffer.Red[ x ][ y ] = InBuffer.Blue[ x ][ y ] + 10;
OutBuffer.Green[ x ][ y ] = InBuffer.Red[ x ][ y ] + 6;
OutBuffer.Blue[ x ][ y ] = InBuffer.Green[ x ][ y ] + 2;
}
}
Visual C++/MFC Example:
void __stdcall CCustomFilterDemoDlg::VLGenericFilter2ProcessData(void *Sender,
TVLCVideoBuffer InBuffer, TVLCVideoBuffer &OutBuffer,
bool &SendOutputData)
{
for ( int x = 0; x < OutBuffer.GetWidth(); x ++ )
for ( int y = 0; y < OutBuffer.GetHeight(); y ++ )
{
OutBuffer.Red[ x ][ y ] = InBuffer.Blue[ x ][ y ] + 10;
OutBuffer.Green[ x ][ y ] = InBuffer.Red[ x ][ y ] + 6;
OutBuffer.Blue[ x ][ y ] = InBuffer.Green[ x ][ y ] + 2;
}
}
