bytes_to_frames(9)

✨ bytes_to_frames — the Kernel API Manual, but make it make sense 💅

okay so bestie, welcome to bytes_to_frames(9) — the little kernel helper that does exactly one thing and does it iconically: it converts a size from bytes into frames. that's it. that's the whole vibe. 🎀

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🌸 NAME 🌸

bytes_to_frames — unit conversion of the size from bytes to frames

like, literally the glow-up of a byte count into a frame count. no cap.

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⭐ SYNOPSIS ⭐

snd_pcm_sframes_t bytes_to_frames (struct snd_pcm_runtime *runtime ,
ssize_t size );

two arguments, one return value, zero drama. the way that signature just sits there being all neat and correct 🫶

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💖 ARGUMENTS 💖

• runtime — the PCM runtime instance. yes queen, you gotta hand over the whole runtime context, she's part of the equation.
• size — the size in bytes. the raw material. the before picture. 🔥

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👑 RETURN 👑

it returns the size in frames. periodt. that's the answer to "so how many frames is that" and it is giving convenience 💜

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🌈 SEE ALSO 🌈

the lore continues in the kernel file ./include/sound/pcm.h — and here's the whole friend group, no one left out bestie:

• 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)
• samples_to_bytes(9)
• frames_to_bytes(9)
• frame_aligned(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)

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ngl if you needed bytes_to_frames you probably also need bytes_to_samples, samples_to_bytes and frames_to_bytes — the conversion quartet ate and left no crumbs 🔥

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that's the whole page bestie, short and slay. this one lives under ./include/sound, dated October 2026, and it's bytes_to_frames(9) from the Kernel API Manual — go forth and convert those bytes into frames 💅✨🌷