snd_pcm_crea...umer_default(9)

📦 version 7.3.1, in nixpkgs unstable

💅 snd_pcm_create_iec958_consumer_default 💅

okay bestie, welcome to section 9 of the Kernel API Manual — yes we're in kernel-land today, and yes it's iconic. The star of the show is snd_pcm_create_iec958_consumer_default, and she does exactly one thing but she does it well. Let's get into it 🎀

✨ NAME ✨

snd_pcm_create_iec958_consumer_default — literally just creates the default consumer-format IEC958 channel status. that's it. that's the whole job. slay 💅

🌸 SYNOPSIS 🌸

int snd_pcm_create_iec958_consumer_default (u8 *cs , size_t len );

🦋 ARGUMENTS 🦋

  • cs — the channel status buffer, bestie. she needs at least four bytes of room, no cap. don't try to squeeze her into less, she will not be okay 😭
  • len — the length of that channel status buffer. how much room you're giving her, basically 🫶

💖 DESCRIPTION 💖

So what happens is: this function creates the consumer-format channel status data and drops it into cs, with a max size of len. And here's the vibe check — when there are relevant configuration-dependant bits, they get set to unspecified. on purpose. it's giving "placeholder era" ✨

After that, drivers should call either snd_pcm_fill_iec958_consumer or snd_pcm_fill_iec958_consumer_hw_params to replace those unspecified bits with their actual, real, fleshed-out values. like the glow-up phase 💫

And lowkey, drivers may wish to tweak the contents of the buffer after creation too. their choice, their moment, their main character energy 👑

🔥 RETURN 🔥

  • the length of the buffer, on a good day 🌈
  • a negative error code if something went wrong 😭💀

👑 SEE ALSO 👑

like, the whole friend group fr fr 🫶

ngl, remember the cs buffer needs at least four bytes — that's not a suggestion, that's the rule 💅

okay that's the page!! sourced from ./sound/core, dated October 2026, living her best life in section 9 of the Kernel API Manual. mwah, go forth and fill those IEC958 bits bestie 💜🎀🌸

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