adc46c4cf7
The AGC is currently bumping up the mic volume to 33% at startup if it is below that level. This is to avoid getting stuck in a poor state from which the AGC can not move, simply a too low input audio level. For some users, 33% is instead too loud. This CL gives the user the possibility to set that level at create time. - Extends the Config ExperimentalAgc with a startup_mic_volume for the user to set if desired. Note that the bump up does not apply to the legacy AGC and the "regular" AGC is controlled by ExperimentalAgc. - Without any actions, the same default value as previously is used. - In addition I removed a return value from InitializeExperimentalAgc() and InitializeTransient() This has been tested by building Chromium on Mac and verify through apprtc that 1) startup_mic_volume = 128 bumps up to 50%. 2) startup_mic_volume = 500 (out of range) bumps up to 100%. 3) startup_mic_volume = 0 bumps up to 4%, the AGC min level. BUG=4529 TESTED=locally R=andrew@webrtc.org, kwiberg@webrtc.org Review URL: https://webrtc-codereview.appspot.com/43109004 Cr-Commit-Position: refs/heads/master@{#9004}