David Alm: Automated Syncronization with Documentation

2011-11-22T00:18:43Z

Automated Syncronization with Documentation

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== 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 :

<code>
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;

</code>
C++ Builder Example:

<code>
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;
}
}

</code>
Visual C++/MFC Example:

<code>
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;
}
}

</code>

TVLGenericFilter.OnProcessData - Revision history

David Alm: Automated Syncronization with Documentation