ref: 8c8381d5439b0caedec42261d32724612cef7f3e
parent: 50c4026e93e0826194ec7e3bd62019a3ff6fe0ef
author: Jingning Han <jingning@google.com>
date: Wed Oct 30 09:52:55 EDT 2013
Enable all-zero coeff block index for sub8x8 blk This commit makes zcoeff_blk cache the case where the entire block is quantized to be zero (without applying zero-forcing) in the rate- distortion optimization loop, and skip the forward DCT, quantization, inverse DCT, and reconstruction process in the encode_block stage. It now works for all the block sizes, including sub8x8 blocks. Change-Id: I5ae60a9c436ba3637d11666733554bec4580ef98