35     int ret = InitTestDemo();  in SetUpTestCase()  local
48     std::string ret = FindAudioDevice();  variable
55     std::string ret = OpenSpk();  variable
62     std::string ret = StartRender();  variable
69     std::string ret = StopRender();  variable
76     std::string ret = CloseSpk();  variable
83     std::string ret = OpenMic();  variable
90     std::string ret = StartCapture();  variable
97     std::string ret = StopCapture();  variable
104     std::string ret = CloseMic();  variable
111     std::string ret = SetVolume("5");  variable
121     std::string ret = GetVolume();  variable