tree 75e6b787809664f31e7636db0a16d113ec9454ab
parent 3bd837753395764035da96ad8dd6d574b1756c96
author David Barker <david.barker@argondesign.com> 1484060768 +0000
committer Debargha Mukherjee <debargha@google.com> 1484241275 +0000

Add SSE2 vectorized warp filter for lowbd

End-to-end speed improvements: (measured on tempete_cif.y4m,
20 frames for encoder and all 260 frames for decoder)

* GLOBAL_MOTION encoder: ~10% faster
* GLOBAL_MOTION decoder: 100-200% faster depending on bitrate
* WARPED_MOTION encoder: ~2.5% faster
* WARPED_MOTION decoder: ~20-40% faster depending on bitrate

The improvement in the GLOBAL_MOTION decoder is particularly
large because its runtime is dominated by calls to warp_plane().

This introduces minor changes to the output of the warp filter,
but these should be rare.

Change-Id: I5813ab9e90311e27587045153c32d400b6b9eb92