Adds the Daala deringing filter as experimental
The deringing filter documentation is in:
J.-M. Valin, The Daala Directional Deringing Filter, arXiv:1602.05975 [cs.MM],
2016.
http://arxiv.org/pdf/1602.05975.pdf
ntt-short1 results:
MEDIUM (%) HIGH (%)
PSNR -2.488088 -2.003235
PSNRHVS -1.588932 -0.797850
SSIM -1.522767 -1.287861
FASTSSIM 4.307822 3.983496
subset1 improvement is around 2-3% on PSNR (but the rate is mostly outside
the AWCY testing range)
Change-Id: Ic02344ce9faa509f5c3a50a0fb7a7b84a7977e72
14 files changed
