snd_pcm_hw_param_first(9)

📦 version 7.3.1, in nixpkgs unstable

✨ snd_pcm_hw_param_first — kernel API manual ✨

okay so bestie, we're in the Kernel API Manual today and this one is honestly lowkey iconic: snd_pcm_hw_param_first(9) 💅 it refines your config space and hands you back the minimum value. that's the whole vibe. periodt.

🌸 NAME 🌸

snd_pcm_hw_param_first — refine config space and return minimum value 🎀

✨ SYNOPSIS ✨

int snd_pcm_hw_param_first (struct snd_pcm_substream *pcm , struct
snd_pcm_hw_params *params , snd_pcm_hw_param_t var , int *dir );

no cap, that's the whole call 🫶

🦋 ARGUMENTS 🦋

  • pcm — your PCM instance 💖 like, the actual stream you're working on
  • params — the hw_params instance, aka where the config space lives
  • var — the parameter you wanna retrieve, bestie. pick one
  • dir — pointer to the direction (-1, 0, 1) or NULL if you're not about that direction life 🙈

💅 DESCRIPTION 💅

so here's the tea ☕ — inside the configuration space defined by params, this function removes from var all the values that are > the minimum, and then it reduces the configuration space accordingly. it's giving "trim the fat, keep the smallest one, main character energy" ✨ obsessed honestly 💜

👑 RETURN 👑

it returns the minimum, or a negative error code on failure 😭 (yes, check it, bestie, always check it fr fr).

🌈 SEE ALSO 🌈

okay this list is LONG and every single one of these is invited to the function party 🎉 no skipping, iykyk:

like, the whole friend group showed up 😭💖

🫶 quick vibe check: var gets its >-minimum values yeeted and the config space shrinks to match. no extra lore, that's literally it. don't invent behaviour, bestie 💀

mwah, that's the page 💋 brought to you from ./sound/core, dated October 2026 — catch you in the next one, bestie, slay 🌟🎀

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