Yaowu Xu 45971abd1d Optimize coef update
1. move the check of search method of USE_TX_8X8 up one level to
avoid operations of build_tree_distributions()
2. count tx used and avoid computaton for coef udpate when one size
is not used at all.

Change-Id: Ia3e54a2588aa531c41377a1bfaa64385d04a592c
2015-01-30 10:16:40 -08:00
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2015-01-30 10:16:40 -08:00
2015-01-30 10:16:40 -08:00