[Bug 743108] v4l2: support radio devices in device monitor

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=743108

GEO <pojar.george at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |pojar.george at gmail.com

--- Comment #5 from GEO <pojar.george at gmail.com> ---
There is someone who can create a patch and implement this option?

According to the spec, a V4L2 radio device can be recognized through the
capability flags

"Devices supporting the radio interface set the |V4L2_CAP_RADIO| and
|V4L2_CAP_TUNER| or |V4L2_CAP_MODULATOR| flag in the /|capabilities|/
field of struct v4l2_capability
<http://linuxtv.org/downloads/v4l-dvb-apis/vidioc-querycap.html#v4l2-capability>"

So you'll get |(V4L2_CAP_RADIO| | |V4L2_CAP_TUNER) for tuners, and
(V4L2_CAP_RADIO || |V4L2_CAP_MODULATOR) for modulator.| Modulators are
not (yet?) supported in GStreamer.

This filtering is relatively trivial and should be added to
gst-plugins-good/sys/v4l2/gstv4l2deviceprovider.c

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