snd_pcm_hw_c...raint_ranges(9)

📦 version 7.3.1, in nixpkgs unstable

💖 snd_pcm_hw_constraint_ranges — the Kernel API Manual page, but make it make sense 🎀

okay so bestie, listen. This one lives in the Kernel API Manual, and it's genuinely not scary — it's like a tiny little bouncer for an interval parameter. Let me put you on. ✨

🌸 NAME 🌸

snd_pcm_hw_constraint_ranges — the function that takes a whole list of range constraints and applies them to a parameter. Yeah. A list. Of ranges. Iconic behavior honestly. 💅

🦋 SYNOPSIS 🦋

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

That's the whole signature, bestie — four things in, one int out. No cap. 🔥

👑 ARGUMENTS 👑

  • runtime — the PCM runtime instance, aka the whole vibe we're operating on. This is your main character. 🫶
  • cond — the condition bits. lil' flags that gate the whole situation.
  • var — the hw_params variable that the list of range constraints gets applied to. Like, which knob are we refining rn.
  • r — the ranges. Literally the list. That's it. That's the girl. 💀

✨ DESCRIPTION ✨

Apply the list of range constraints to an interval parameter.

That's the entire description — short and slaying. It takes your ranges and constrains the interval parameter with them. Simple as. 🌈

⭐ RETURN ⭐

Zero if it worked (success, we love to see it 💖), or a negative error code on failure (not slay, but at least it tells you). 😭

🍓 SEE ALSO 🍓

Everything's in the kernel file ./sound/core/pcm_lib.c, and these are all the friends in the group chat:

mwah 💜 that's the whole page, go read ./sound/core if you wanna get deep in it — this one's from the Kernel API Manual, filed under October 2026, sourced from ./sound/core. k bye, ily, go constrain some ranges 🧚‍♀️✨

📦 where this page comes from