Commit f6c807c5 authored by Committed by Tim Terriberry
ec_smallmul: Convert CDFs to iCDFs.
Hoists the iCDF conversion outside of the daala code. We directly store 32768 - cdf[i] in each cdf, to avoid having to convert the whole array every time a symbol is coded. This works with ec_multisymbol, new_tokenset, and ec_adapt. Compared to Change-Id Idbbd3743e9189146cb519d5b984bdabd69e3f4c0, this improves decoder runtimes by 1.15% at QP=55 and 2.64% at QP=20. The overall slowdown of ec_smallmul is now 0.12% at QP=55 and 0.44% at QP=20. Encoder output should not change, and all streams should remain decodable without decoder changes. Change-Id: I06b8b75b667bb1bc4ddffc78f895e48a09f4c578
Showing with 2833 additions and 1432 deletions