Deezer integration

[Cebolla]

The BubbleUPnP Android app has native support for certain online music streaming & cloud services, but Deezer is not one of them - don't know where you got your information from. If you use BubbleUPnP with a rooted Android device, you can get its Audio Cast feature to stream from most sound producing apps for Android, so you could probably get Deezer's audio that way.

The iDevices only support audio capture streaming via AirPlay, which unfortunately your Oppo doesn't support. Also, even though the Windows version of JRiver comes with audio input driver which you can use to pass the computer's audio through to JRiver's player, unfortunately there's no way you can stream that output via UPnP/DLNA.

If it's a Windows computer, then there are ways of capturing the computer's audio (so including that from accessing Deezer) and streaming it to a UPnP/DLNA supporting player, like your Oppo, for free. For example (in low to high order of complexity, eficiency & customisation):
Stream What You Hear (SWYH);
VB-Audio Cable plus the foobar2000 audio file player with the foo_record and the foo_out_upnp or foo_upnp plugins;
VB-Audio Cable plus the Icecast 2 server and the AltaCast Icecast client.

You can even get MinimServer to provide the stream as an internet radio station, though in the first two methods there's a built-in UPnP/DLNA media server available for the stream anyway.