/** Retrieves the device information of the current audio playback device. * * @param deviceName The device name of the current audio playback device. * @param deviceId The device ID of the current audio playback device. * * @return * - 0: Success. * - < 0: Failure. */ public override int GetCurrentPlaybackDeviceInfo(ref string deviceName, ref string deviceId) { if (mEngine == null) { return((int)ERROR_CODE.ERROR_NOT_INIT_ENGINE); } if (GetAudioPlaybackDeviceCount() > 0) { System.IntPtr playbackDeviceName = Marshal.AllocHGlobal(512); System.IntPtr playbackDeviceId = Marshal.AllocHGlobal(512); int ret = IRtcEngineNative.getCurrentPlaybackDeviceInfo(playbackDeviceName, playbackDeviceId); deviceName = Marshal.PtrToStringAnsi(playbackDeviceName); deviceId = Marshal.PtrToStringAnsi(playbackDeviceId); Marshal.FreeHGlobal(playbackDeviceName); Marshal.FreeHGlobal(playbackDeviceId); return(ret); } else { return((int)ERROR_CODE.ERROR_NO_DEVICE_PLUGIN); } }