tree 1b1d666104bc4026d3452556a2356d309a4ac0af
parent e807e6bc67484329b637b25dffbe267858b8614a
author Andy Hung <hunga@google.com> 1621450918 -0700
committer Andy Hung <hunga@google.com> 1630541783 -0700

EffectDownmix: Update for new ChannelMix matrix

Downmix matrix compliant with the following standards:
ITU-R 775-2, ATSC A/52, ETSI TS 101 154, IEC 14496-3,
which is unity gain for the front left and front right channel
contribution.

Correspondingly, output amplitude is allowed to be +3dBFS
from 0dBFS previously.

Test: atest downmix_benchmark
Test: atest downmix_tests
Bug: 188502620
Bug: 189336830
Change-Id: I4c06a2ea0e4619d8a5607fbeb68ee65b663aaf55