GitLab

since G722 implementation is bit exact and uses 14 bit input, shift input right and left to avoid saturation.
The bit shift should be 2, but for some reason (??) 1 seems enough.

Start/Stop/is_running are thread safe
Wait for all callbacks are done when stopping client

add galaxy S2 model.

Add default settings for many android phones, so that calibration is not required on most common models.
Improve latency (again) of sound module.