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Timothy B. Terriberry authored
They do not handle border extension correctly (interpolation and border extension do not commute unless you upsample into the border), nor do they handle crop dimensions that are not a multiple of 8 (the upsampled version is not sufficiently large), in addition to using massive amounts of memory and being a criminal waste of cache (1 byte used for every 8 bytes fetched). This commit reimplements use_upsampled_references by computing the subpixel samples on the fly. This implementation not only corrects the border handling, but is also faster, while maintaining the same quality. HL AWCY results are basically noise: PSNR | PSNR HVS | SSIM | MS SSIM | CIEDE 2000 0.0188 | 0.0187 | 0.0045 | 0.0063 | 0.0228 Change-Id: I7527db9f83b87a7bb8b35342f7e6457cd0bef9cd
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