private FrameSet HandleSingleFrameProcessingBlocks(FrameSet frameSet, FrameSource frameSource, FramesReleaser framesReleaser, RsProcessingBlock videoProcessingBlock, Action <Frame> handleFrame)
{
// single frame filters
List <Frame> processedFrames = new List <Frame>();
foreach (var frame in frameSet)
{
var currFrame = ApplyFilter(frame, frameSource, framesReleaser, videoProcessingBlock, handleFrame);
// cache the pocessed frame
processedFrames.Add(currFrame);
if (frame != currFrame)
{
frame.Dispose();
}
}
// Combine the frames into a single frameset
var newFrameSet = frameSource.AllocateCompositeFrame(framesReleaser, processedFrames.ToArray());
foreach (var f in processedFrames)
{
f.Dispose();
}
return(newFrameSet);
}
private Frame ApplyFilter(Frame frame, FrameSource frameSource, FramesReleaser framesReleaser, RsProcessingBlock vpb, Action <Frame> handleFrame)
{
if (!vpb.CanProcess(frame))
{
return(frame);
}
// run the processing block.
var processedFrame = vpb.Process(frame, frameSource, framesReleaser);
// incase fork is requested, notify on new frame and use the original frame for the new frameset.
if (vpb.Fork())
{
handleFrame(processedFrame);
processedFrame.Dispose();
return(frame);
}
// avoid disposing the frame incase the filter returns the original frame.
if (processedFrame == frame)
{
return(frame);
}
// replace the current frame with the processed one to be used as the input to the next iteration (next filter)
frame.Dispose();
return(processedFrame);
}
private FrameSet HandleMultiFramesProcessingBlocks(FrameSet frameSet, FrameSource frameSource, FramesReleaser framesReleaser, RsProcessingBlock videoProcessingBlock, Action <FrameSet> handleFrameSet)
{
using (var frame = frameSet.AsFrame())
{
if (videoProcessingBlock.CanProcess(frame))
{
using (var f = videoProcessingBlock.Process(frame, frameSource, framesReleaser))
{
if (videoProcessingBlock.Fork())
{
handleFrameSet(FrameSet.FromFrame(f, framesReleaser));
}
else
{
return(FrameSet.FromFrame(f, framesReleaser));
}
}
}
}
return(frameSet);
}
public void RemoveProcessingBlock(RsProcessingBlock processingBlock)
{
_processingBlocks.Remove(processingBlock);
}
public void AddProcessingBlock(RsProcessingBlock processingBlock)
{
_processingBlocks.Add(processingBlock);
}
