tree 0f8a57676ec5ac53b22594b5f754a6216c720651
parent 84e35d995f0b804a322e9e07fd1a0341658763ef
author Eric Laurent <elaurent@google.com> 1311539769 -0700
committer Eric Laurent <elaurent@google.com> 1311629940 -0700

Added APIs for audio preprocessing

Added APIs to control pre processes applied on captured audio.
Those APIs are still hidden until reviewed by API council.

Three types of standard pre processes are supported:
- Automatic Gain Control (AGC) by AutomaticGainControl class
- Acoustic Echo Cancellation (AEC) by AcousticEchoCanceler class
- Noise Suppression (NS) by NoiseSuppressor class

A method is added to AudioEffect class to query audio pre processings
applied by default by the platform on a given AudioRecord session ID.

Change-Id: I0b9fceeb8c704dd06319c3b52b85c96fe871d51d