ref: 6a819ce4fe9e4cc6bd9eed1d19ee90602651ddf5
parent: 6b7cf3077d6f9a166e0f82c1e91fd64a646d11b0
author: Yunqing Wang <yunqingwang@google.com>
date: Wed Mar 14 06:03:39 EDT 2012
Add motion search skipping in first pass This change added a motion search skipping mechanism similar to what we did in second pass. For a macroblock that is very similar to the macroblock at same location on last frame, we can set its mv to be zero, and skip motion search. This improves first-pass performance for slide shows and video conferencing clips with a slight PSNR loss. Change-Id: Ic73f9ef5604270ddd6d433170091d20361dfe229