v4l2_ctrl_radio_filter(9)

📦 version 7.3.1, in nixpkgs unstable

💅 v4l2_ctrl_radio_filter(9) — Kernel API Manual, bestie edition 🎀

okay so welcome to the v4l2_ctrl_radio_filter(9) page from the Kernel API Manual ✨ this one's short and sweet and it's basically a bouncer for radio controls, let's get into it 🦋

🌸 NAME 🌸

v4l2_ctrl_radio_filter — the standard filter for radio controls, periodt 💅

✨ SYNOPSIS ✨

bool v4l2_ctrl_radio_filter (const struct v4l2_ctrl *ctrl );

🫶 ARGUMENTS 🫶

  • ctrl — the control that's getting filtered. like, this is the one going through the vibe check 💅

👑 DESCRIPTION 👑

so the way this works: this function returns true for any controls that are valid for radio device nodes 💖 and which ones are those, you ask? it's all of the V4L2_CID_AUDIO_* user controls, plus all the FM transmitter class controls. that's the whole guest list, no cap 🔥

and bestie, this function is meant to be used with v4l2_ctrl_add_handler. like that's its whole moment, that's its main character energy 👑

🌈 SEE ALSO 🌈

okay this list is long but we're not skipping a single one because every link is iconic in its own way 😭 starting with the kernel file itself:

  • Kernel file ./include/media/v4l2-ctrls.h

and now the whole friend group, in order:

okay that's the page!! tysm for reading bestie, go filter some radio controls and slay 💜

this page was brought to you by ./include/media, dated October 2026, and it's the v4l2_ctrl_radio_filter(9) page — stan. 🦋✨

📦 where this page comes from