snd_pcm_rate_mask_intersect(9)

📦 version 7.3.1, in nixpkgs unstable

💅 snd_pcm_rate_mask_intersect ✨

okay so bestie, you know how there's a kernel API manual? yeah. this is a page from it — snd_pcm_rate_mask_intersect(9) — and honestly? it's giving "small function, big responsibilities." let me walk you through it 🫶

🌸 NAME 🌸

snd_pcm_rate_mask_intersect — literally just computes the intersection between two rate masks. that's it. that's the whole vibe. two masks walk in, one mask walks out 💅

✨ SYNOPSIS ✨

unsigned int snd_pcm_rate_mask_intersect (unsigned int rates_a ,
       unsigned int rates_b );

like, copy that exactly, don't get creative with it 😌

🎀 ARGUMENTS 🎀

  • rates_a — the first rate mask. yes, the first one. we love an opening act 👑
  • rates_b — the second rate mask. the sequel. the encore. the other half of this whole operation 🦋

both are unsigned int, both are masks, both matter. no cap.

💖 DESCRIPTION 💖

so here's the tea, bestie: this function computes the rates that are supported by both rate masks passed to the function. it's an intersection, periodt. overlap only. if rates_a stans a rate and rates_b doesn't, that rate is NOT making the cut, sorry not sorry 🙈

and the iconique part? it will take care of the special handling of SNDRV_PCM_RATE_CONTINUOUS and SNDRV_PCM_RATE_KNOT. those two get treated differently and this function knows — you don't have to do the awkward special-casing yourself. main character energy fr fr ⭐

🔥 RETURN 🔥

a rate mask containing the rates that are supported by both rates_a and rates_b. that's the whole thing it returns. a mask. a beautiful, intersecting, mutually-agreed-upon mask 🌈💜

🦋 SEE ALSO 🦋

kernel file ./sound/core/pcm_misc.c — go read it, iykyk 👀

and the whole friend group:

🧚 sign-off 🧚

this page lives in ./sound/core, and it was dated October 2026. slay. that's the source and the version and the date, all accounted for, we don't skip the boring bits here 💖✨

k bye bestie, go intersect some masks 💅🎀

📦 where this page comes from