Joining a channel in AR Client

RAAR_JoinChannel.cs

    public void join(string channel)
    {
        Debug.Log("calling join (channel = " + channel + ")");

        if (mRtcEngine == null)
            return;

        // set callbacks (optional)
        mRtcEngine.OnJoinChannelSuccess = onJoinChannelSuccess;
        mRtcEngine.OnUserJoined = onUserJoined;
        mRtcEngine.OnUserOffline = onUserOffline;

        // enable video
        mRtcEngine.EnableVideo();
        // allow camera output callback
        mRtcEngine.EnableVideoObserver();
        //mRtcEngine.EnableLocalVideo(false);
        CameraCapturerConfiguration config = new CameraCapturerConfiguration();
        config.preference = CAPTURER_OUTPUT_PREFERENCE.CAPTURER_OUTPUT_PREFERENCE_AUTO;
        config.cameraDirection = CAMERA_DIRECTION.CAMERA_REAR;
        mRtcEngine.SetCameraCapturerConfiguration(config);

        mRtcEngine.SetExternalVideoSource(true, false);

        // join channel
        mRtcEngine.JoinChannel(channel, null, 0);

        // Optional: if a data stream is required, here is a good place to create it
        int streamID = mRtcEngine.CreateDataStream(true, true);
        Debug.Log("initializeEngine done, data stream id = " + streamID);
    }