ENUM VFL_DEVNODE_DIRECTION(9)

📦 version 7.3.1, in nixpkgs unstable

💅 enum vfl_devnode_direction(9) — bestie edition 🎀

okay so this is a page from the Kernel API Manual, and it's about one little enum that answers the question every V4L2 device has to answer at some point: am I the one sending, the one receiving, or the one doing both sides at once? iconic behavior honestly 💖

✨ NAME ✨

enum vfl_devnode_direction — literally just tells you whether a &struct video_device is a receiver, a transmitter, or a mem-to-mem device. that's it. that's the whole vibe check 🦋

🌸 SYNOPSIS 🌸

enum vfl_devnode_direction {
    VFL_DIR_RX ,
    VFL_DIR_TX ,
    VFL_DIR_M2M

};

three constants, no cap, no extras 💅

🎀 Constants 🎀

  • VFL_DIR_RX — this device is a receiver. it's giving "i listen, i take in" energy 👂✨
  • VFL_DIR_TX — this device is a transmitter. main character energy, it puts stuff out into the world 📡🔥
  • VFL_DIR_M2M — this is a memory to memory device. no outside world involved, it just does its little transformation internally, obsessed 🧚

⭐ Note ⭐

🚨 heads up bestie: this whole thing gets ignored if enum vfl_devnode_type is VFL_TYPE_SUBDEV. like, don't even worry about it in that case. periodt 💀

🌈 SEE ALSO 🌈

so many besties linked here, we love a connected ecosystem 🫶 — and it all lives in the kernel file ./include/media/v4l2-dev.h:

and that's the whole page, bestie, go read your kernel headers 💖

this cutie lives over in ./include/media, dated October 2026, and it's page enum vfl_devnode_direction(9) of the Kernel API Manual — mwah, see u in the group chat 😘🎀

📦 where this page comes from