snd_pcm_hw_...aint_ratnums(9)

📦 version 7.3.1, in nixpkgs unstable

💅 snd_pcm_hw_constraint_ratnums 💅

okay so bestie, we're in the Kernel API Manual today and this one is a whole function — snd_pcm_hw_constraint_ratnums — and it's literally about applying a ratnums constraint to a parameter. yes, that's the whole vibe. it eats. let's get into it 🎀

✨ NAME ✨

snd_pcm_hw_constraint_ratnums — apply ratnums constraint to a parameter 🦋

✨ SYNOPSIS ✨

int snd_pcm_hw_constraint_ratnums (struct snd_pcm_runtime *runtime ,
unsigned int cond , snd_pcm_hw_param_t var , const struct
snd_pcm_hw_constraint_ratnums *r );

✨ ARGUMENTS ✨

okay so these are the four besties you're handing over, and each one has main character energy in its own way 💖

  • runtime — the PCM runtime instance. that's the whole world this is happening in, no cap.
  • cond — the condition bits. the little vibe check that says when this applies 🎀
  • var — the hw_params variable you're putting the ratnums constraint on. this is the actual target, bestie.
  • r — struct snd_ratnums constriants. yep, that's the constraints struct, and yes that's how it's spelled up in here, iykyk 🙈

✨ RETURN ✨

it gives you zero if everything slayed ✅ — or a negative error code on failure 😭. so like, check it. fr fr.

✨ SEE ALSO ✨

literally the whole friend group 🫶 — go say hi:

and that's the page!! 🌈✨ this lil gem lives in ./sound/core, and it's dated October 2026 — so yeah, it's giving futuristic kernel lore 👑. mwah, go constrain some ratnums, bestie 💜🎀

📦 where this page comes from