v4l2_m2m_qbuf(9)

📦 version 7.3.1, in nixpkgs unstable

💅 v4l2_m2m_qbuf — Kernel API Manual (yes bestie, the whole vibe) ✨

okay so picture this: it's giving kernel-internals era, and this lil function is the one that actually pushes your buffer into the queue. It's from the Kernel API Manual and honestly it's kind of a main character.

🌸 NAME 🌸

v4l2_m2m_qbuf — enqueue a source or destination buffer, depending on the type 🫶

Like, it's not gonna ask you which one — the type in your buffer struct tells it everything it needs. iykyk.

✨ SYNOPSIS ✨

int v4l2_m2m_qbuf (struct file *file , struct v4l2_m2m_ctx *m2m_ctx ,
struct v4l2_buffer *buf );

three args, returns an int, no cap. periodt.

🦋 ARGUMENTS 🦋

  • file — pointer to struct file. literally just the file pointer, bestie, it's right there in the name 💀
  • m2m_ctx — the m2m context assigned to the instance, given by struct v4l2_m2m_ctx. this is the little home your buffers live in, keep it close 🎀
  • buf — pointer to struct v4l2_buffer. this is the actual buffer you're yeeting into the queue, so pls make sure it's valid 🙈

🌈 SEE ALSO 🌈

the whole friend group, fr fr — first up, the kernel file:

Kernel file ./include/media/v4l2-mem2mem.h

and the structs, iconic the both of them:

  • struct v4l2_m2m_ops(9)
  • struct v4l2_m2m_queue_ctx(9)
  • struct v4l2_m2m_ctx(9)
  • struct v4l2_m2m_buffer(9)

then the rest of the squad, in the exact order they showed up to the group chat 👑

no skips, no cuts, the whole list ate and left no crumbs 💅

ok that's the page!! mwah 💖 this lil manpage lives at ./include/media and it's dated October 2026 — mark your calendars bestie, and go enqueue something iconic 🌟
📦 where this page comes from