Deoldify Vapoursynth filter

[Dan64]

An interesting feature that I added in HAVC_cmnet2dit() is the retry_threshold, if retry_threshold > 0, this value will be used to detect frames with insufficient permanent-memory coverage and in this case the frame with missing good reference will be colorized on the fly. The colorization model used is specified by retry_model. The best model to use in this case is 1 or 2 (depending on GPU used) but unfortunately this will slow down the inference speed by about 40%-50%. I added also the retry_model=0, in this case the frame will be colorized with HAVC (60% Deoldify + 40% DDColor), this is faster, but the quality is not good if compared to DiT models.

To be able to use retry_model=0 to colorize on the fly a single image I had to modify DDColor to add the class DDColorEngine which allow single image colorization.

I attached the new vsddcolor (zipped) wheel to this post, which contains this new functionality.

Dan