snd_pcm_playback_avail(9)

📦 version 7.3.1, in nixpkgs unstable

💖 snd_pcm_playback_avail(9) 💖

okay so bestie, we're deep in the Kernel API Manual today — yes, that manual — and this little function is genuinely one of the cutest ones in the whole PCM family. no cap.

✨ NAME ✨

snd_pcm_playback_avail — Get the available (writable) space for playback

like. it literally tells you how much room you've got to write into. main character energy fr fr 🎀

🌸 SYNOPSIS 🌸

snd_pcm_uframes_t snd_pcm_playback_avail (struct snd_pcm_runtime
*runtime );

that's the whole signature, copy it exactly bestie, don't be cute with it 💅

🦋 ARGUMENTS 🦋

  • runtime — PCM runtime instance. that's your girl, the runtime struct, the one carrying all the state. you hand her over and she does the math.

💜 DESCRIPTION 💜

okay so the result it gives you? it's always between 0 ... (boundary - 1).

that's it. that's the whole description. lowkey iconic that it's that short. no extra lore, no plot twists, just a range check vibe. ✨

🔥 RETURN 🔥

available frame size 🌈

(so like, a count of frames, and it's the available ones — the writable space — not the total, not the hardware one, just avail. iykyk)

👑 SEE ALSO 👑

Kernel file ./include/sound/pcm.h — and honestly the whole friend group showed up, so let's go:

💀 that's a lot of cross-references and yes you should actually go read them, they're all doing real work. not me being a nerd about it. okay maybe a little.

okay that's the page!! it's giving "short and correct," which is honestly the best combo 🫶

signed, sealed, delivered from source ./include/sound, dated October 2026, version snd_pcm_playback_avail(9) — slay, go write some frames bestie 🎀✨🌸💖

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