Dear list, I've been looking at the necessary pieces for FM radio support, and I hope somebody can correct me, but it looks more complicated than I expected.
For some reason Android doesn't have an FM radio API and leaves it up to the manufacturers to come up with something. I've looked at several devices, among them the bq Aquaris E4.5, and every SoC manufacturer seems to have a different opinion on how to do it. Some ship no FM radio at all. Some seem to ship drivers for the Linux V4L subsystem. MediaTek (Aquaris E4.5 and E5) decided to implement custom kernel drivers with a custom character device (/dev/fm) and custom ioctl commands. There seem to be userspace libraries (libfm*) including a JNI wrapper in /system/lib of the Android container on our Ubuntu phones. Because there is no standard API, there are no generic FM radio apps for Android, and pretty much every manufacturer ships a custom app for his own SoC(s) and/or device(s). I'll try to come up with a piece of C code for the command line that can at least initialize and tune the FM radio on the Aquaris E4.5 and E5. The long-term goal could be to turn this into plugins for an extended media-hub. cheers, Simon -- Mailing list: https://launchpad.net/~ubuntu-phone Post to : ubuntu-phone@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-phone More help : https://help.launchpad.net/ListHelp
