
A single participant is not processed at all. With multiple participants, we divide-by-2 as before when mixing. Afterwards, the mixed signal is limited by the AGC to -7 dBFS and then doubled to restore the original level. This preserves the level while guaranteeing good saturation protection. Add a test to voe_auto_test. Hijack and improve the existing mixing test for this. TEST=voe_auto_test, voe_cmd_test Review URL: http://webrtc-codereview.appspot.com/241013 git-svn-id: http://webrtc.googlecode.com/svn/trunk@920 4adac7df-926f-26a2-2b94-8c16560cd09d
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