Hello Ming, we are using the refresh function to update a list of audio device in the system. One problem was, that when there are two audio devices, which both should be used (e.g. one for ringtone, the other for call, or some usb-devices being connected at runtime), it could happen, that using one or the other device fails, depending whether the user is calling the refresh function or not. Imagine you are using deviceA for callA, user wants to change audio device while calling and therefore lists available audio devices (leading to a call to refresh audio devices), now deviceA is not in list anymore, but deviceB. So user is switching to deviceB, everything fine. The next call, callB, should start at deviceA again (as this is users default or something), but deviceA is not available (because user now did not call refresh function again). You may note that listing of audio devices is not the same as refreshing audio device list, but listing of audio devices must include a call to refresh audio devices to include dynamically added/removed devices (like USB). I hope the scenario is clear so far. Regards, Tobias Am 25.07.2018 um 01:48 schrieb Ming: > Hi Tobias, > > Can you let us know in what use cases can this be useful? Since the > device won't be usable anyway. > > Regards, > Ming > _______________________________________________ Visit our blog: http://blog.pjsip.org pjsip mailing list pjsip@xxxxxxxxxxxxxxx http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
