snd_pcm_lib_buffer_bytes(9)

snd_pcm_lib_buffer_bytes(9) 💖

okay so bestie, this little page is straight outta the Kernel API Manual 🫶 and it's all about snd_pcm_lib_buffer_bytes(9) — the function that hands you the buffer size of the current PCM in bytes. it's giving "tiny but iconic" ✨ no cap.

✨ NAME ✨

snd_pcm_lib_buffer_bytes — get the buffer size of the current PCM in bytes 💅 literally the whole assignment, periodt.

🌸 SYNOPSIS 🌸

size_t snd_pcm_lib_buffer_bytes (struct snd_pcm_substream *substream );

🎀 ARGUMENTS 🎀

• substream — the PCM substream 🎧 that's the one and only thing you hand over, bestie.

🦋 RETURN 🦋

Returns the buffer byte size 💖 yes, that's the return value — the byte size of the buffer, slay.

⭐ SEE ALSO ⭐

Kernel file ./include/sound/pcm.h 📁 — and then there's this whole linked-up posse of related refs, so let's give them their moment 👑

• 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)
• frame_aligned(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)

mwah 💋 — this page is from ./include/sound, dated October 2026, and it's all about snd_pcm_lib_buffer_bytes(9) 🫶