51b6e73a68
This commit makes operations of the superblock intra coding rate distortion optimization consistent with those used in the encoding process. Given the test prediction mode and transform size, the rd optimizer encodes and reconstructs each transformed block of the superblock consecutively, then computes the total rate-distortion costs accosicated with the current superblock to select the coding decisions. It achieves coding performance gains: derf 0.353% yt 1.111% Change-Id: I0da2eb7a71361dfb8c1384927fc536b0c2790d07