snd_pcm_hw_rule_add(9)

📦 version 7.3.1, in nixpkgs unstable

✨ snd_pcm_hw_rule_add(9) ✨

okay bestie, so this one's from the Kernel API Manual and it's literally the glow-up your PCM constraints needed 💅

🌸 NAME 🌸

snd_pcm_hw_rule_add — adds the hw-constraint rule, no cap 🧚

🎀 SYNOPSIS 🎀

int snd_pcm_hw_rule_add (struct snd_pcm_runtime *runtime , unsigned int
cond , int var , snd_pcm_hw_rule_func_t func , void *private , int dep ,
... );

💖 ARGUMENTS 💖

  • runtime — the pcm runtime instance, your whole main character setup 🫶
  • cond — the condition bits, lowkey the vibe check
  • var — the variable to evaluate, the one we're checking ✨
  • func — the evaluation function, the actual brain of the operation
  • private — the private data pointer passed to function, iykyk 🙈
  • dep — the dependent variables, the entourage
  • ... — variable arguments, the extra sparkle you can sprinkle in 🌈

🔥 RETURN 🔥

Zero if successful, or a negative error code on failure. That's the vibe — 0 means slay, negative means something went wrong and you're not okay 😭

👑 SEE ALSO 👑

Kernel file ./sound/core/pcm_lib.c

And bestie, there are SO many related icons, let's go through them because they all ate 💅:

snd_pcm_set_ops(9), snd_pcm_set_sync_per_card(9), snd_interval_refine(9), snd_interval_div(9), snd_interval_muldivk(9), snd_interval_mulkdiv(9), snd_interval_ratnum(9), snd_interval_ratden(9), snd_interval_list(9), snd_interval_ranges(9), snd_pcm_hw_constraint_mask(9), snd_pcm_hw_constraint_mask64(9), snd_pcm_hw_constraint_integer(9), snd_pcm_hw_constraint_minmax(9), snd_pcm_hw_constraint_list(9), snd_pcm_hw_constraint_ranges(9), snd_pcm_hw_constraint_ratnums(9), snd_pcm_hw_constraint_ratdens(9), snd_pcm_hw_constraint_msbits(9), snd_pcm_hw_constraint_step(9), snd_pcm_hw_constraint_pow2(9), snd_pcm_hw_rule_noresample(9), snd_pcm_hw_param_value(9), snd_pcm_hw_param_first(9), snd_pcm_hw_param_last(9), snd_pcm_hw_params_bits(9), snd_pcm_lib_ioctl(9), snd_pcm_period_elapsed_under_stream_lock(9), snd_pcm_period_elapsed(9), snd_pcm_add_chmap_ctls(9)

that's a whole friend group fr fr 🫶 go read them next, they're all iconic in their own way

anyway bestie, this page came from ./sound/core and it's dated October 2026 — so like, future vibes only ⭐ go forth and add those rules, you're gonna do amazing 💜✨🎀

📦 where this page comes from