FrameFilterImpl::transform Method

This method is called when a frame must be transformed or copied from the source to the destination IFrame.

Syntax:

virtual bool transform( const IFrame& src, IFrame& dest ) = 0;

Parameter		Description


src		Source frame. You must not write to this frame.
dest		Destination frame. You should only write to the destination frame when you return true.

Return Value:

Value Description

true The transformation was successful.

false Discard the frame.

Remarks:

The image data pointer returned by IFrame::getPtr may be 0 for the destination frame dest. In this case, no target for the copy operation is available, e.g. all buffers of the MemBufferCollection are locked. The transform filter is called, because the implementation may need to analyze the input data.

See also:

FrameFilterImpl, IFrame

<< FrameFilterImpl