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Linfeng Zhang authored
Scale 3x3 block instead of 16x16 block in each loop. Benefits: 1. Reduced number of different phase_scaler from 16 to 3. Optimization code will be smaller and faster. 2. The maximum phase_scaler drifting will be reduced from 5/16 to 1/24. (The drifting is 1/(3*16) in each step.) BUG=webm:1419 Change-Id: Ibb9242a629ddb03e1ff93b859bece738255e698c
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