snd_pcm_capture_ready(9)

💖 snd_pcm_capture_ready(9) 💖

okay so this is a page straight out of the Kernel API Manual, and bestie, it's a tiny little function with main character energy. let's get into it 💅

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✨ NAME ✨

snd_pcm_capture_ready — literally just checks whether the capture buffer is available. that's it. that's the whole vibe check 🌸

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🦋 SYNOPSIS 🦋

int snd_pcm_capture_ready (struct snd_pcm_substream *substream );

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🎀 ARGUMENTS 🎀

• substream — the pcm substream instance, aka the thing you're checking. hand it over and let the function do its thing 🫶

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💅 DESCRIPTION 💅

so what does it actually do? it checks whether enough capture data is available on the capture buffer. that's the tea ☕ like, is there data ready for you or not, bestie? no cap, that's the entire description.

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⭐ RETURN ⭐

• Non-zero → it's available, slay 🔥
• zero → nope, not available 😭

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🌈 SEE ALSO 🌈

okay this is the part where the page goes full group chat and @'s literally everyone in the kernel sound subsystem. iykyk. the kernel file is ./include/sound/pcm.h, and here's the whole squad:

• 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_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_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, that's the whole friend list, periodt 👑

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ngl this page is tiny but it's still iconic. treat your substream right and it'll tell you the truth 💜

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okay that's the page!! it lives over in ./include/sound, dated October 2026, and it's part of the Kernel API Manual — catch you on the next manpage, bestie 🧚💖✨