gst-device-monitor: Don't print duplicated device

Reverting the commit dff5399e to fix regression. And fixes the issue which was originally aimed to be solved.

cc: @meh

@meh changed the API (not dropping initial GstDevices) to avoid having to have such complex code in applications. So if it doesn't work, I think it's better to fix/improve the GstDeviceMonitor itself than complexify the tool.

Non monitoring providers don't post the bus messages, so this is a bit of bigger break. Why did we break our API ?

added 26 commits

• 47581b39...73bd32e7 - 24 commits from branch gstreamer:master
• 45ad89d8 - Revert "gst-device-monitor: stop calling gst_device_monitor_get_devices()"
• 604abee5 - gst-device-monitor: Don't print duplicated device

Compare with previous version

Due to recent change of dropping gst_device_monitor_get_devices() call, gst-device-monitor does not print static device providers. Is it expected one?

no, this is definitely a bug introduced in !427 (merged) .. It should have had a fallback for static ones..

Created a blocker #720 (closed) , please do so next time when you find such regression, I had to discover this after the fact.

mentioned in merge request !427 (merged)

I'll close this in favor of gstreamer!353 (merged) as I think this MR just showed that the core API sucked...

closed

mentioned in merge request gstreamer!353 (merged)