public void UnRegisterSessionStateCallBack(CallBacks.AudioSessionStateCallBack callBack)
        {
            if (null == _volumeCallBack)
            {
                return;
            }

            _stateCallBack -= callBack;
        }
 public void RegisterSessionStateCallBack(CallBacks.AudioSessionStateCallBack callBack)
 {
     _stateCallBack += callBack;
 }