frame_aligned(9)

💅 frame_aligned(9) — Kernel API Manual ✨

okay so real talk, bestie: this page lives in the Kernel API Manual and it's called frame_aligned(9), and it's honestly one of those tiny little helpers that you'd never notice but like... it's doing the most for you. 🫶

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✨ NAME ✨

frame_aligned — check whether the byte size is aligned to frames 🎯

like, is your byte count a whole number of frames or is it giving "off by a crumb"? that's the whole vibe check. 🌸

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🌈 SYNOPSIS 🌈

int frame_aligned (struct snd_pcm_runtime *runtime , ssize_t bytes );

that's the whole thing. one function, two args, no drama. periodt. 💅

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🎀 ARGUMENTS 🎀

• runtime — the PCM runtime instance, aka the little universe this check belongs to. you gotta tell it which PCM we're talking about, iykyk. 🦋
• bytes — the size in bytes that you want checked. ssize_t, so yes it's signed, and yes that's just how it is. 💖

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⭐ RETURN ⭐

it hands back true if it's aligned, or false if it is not aligned. no in-between, no "it depends", no main character ambiguity. 😭

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💜 SEE ALSO 💜

okay bestie this list is LONG, but every single one of these is iconic in its own right and they all live together in the kernel file ./include/sound/pcm.h — the way that one header file is carrying the entire sound subsystem, honestly obsessed 🧚:

• snd_pcm_stream_linked(9)
• snd_pcm_stream_lock_irqsave(9)
• snd_pcm_stream_lock_irqsave_nested(9)
• snd_pcm_group_for_each_entry(9)
• snd_pcm_running(9)
• __snd_pcm_set_state(9)
• bytes_to_samples(9)
• bytes_to_frames(9)
• samples_to_bytes(9)
• frames_to_bytes(9)
• snd_pcm_lib_buffer_bytes(9)
• snd_pcm_lib_period_bytes(9)
• snd_pcm_playback_avail(9)
• snd_pcm_capture_avail(9)
• snd_pcm_playback_hw_avail(9)
• snd_pcm_capture_hw_avail(9)
• snd_pcm_playback_ready(9)
• snd_pcm_capture_ready(9)
• snd_pcm_playback_data(9)
• snd_pcm_playback_empty(9)
• snd_pcm_capture_empty(9)
• snd_pcm_trigger_done(9)
• params_channels(9)
• params_rate(9)
• params_period_size(9)
• params_periods(9)
• params_buffer_size(9)
• params_buffer_bytes(9)
• snd_pcm_hw_constraint_single(9)
• snd_pcm_format_cpu_endian(9)
• snd_pcm_set_sync(9)
• snd_pcm_set_runtime_buffer(9)
• snd_pcm_gettime(9)
• snd_pcm_set_fixed_buffer(9)
• snd_pcm_set_fixed_buffer_all(9)
• snd_pcm_sgbuf_get_addr(9)
• snd_pcm_sgbuf_get_chunk_size(9)
• snd_pcm_limit_isa_dma_size(9)
• snd_pcm_direction_name(9)
• snd_pcm_stream_str(9)
• snd_pcm_chmap_substream(9)
• pcm_format_to_bits(9)
• pcm_for_each_format(9)

like, go read them. they're all your besties too now. 🔥👑

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and that's the page, bestie! no cap, no filler, just the alignment check. 🍓

mwah 💋 — this lil page is served fresh from ./include/sound, October 2026 edition, and honestly? slay. ✨📅