snd_pcm_chmap_substream(9)

💖 snd_pcm_chmap_substream(9) 💖

okay bestie, welcome to the Kernel API Manual page for snd_pcm_chmap_substream — it's lowkey simple and honestly kinda iconic. ✨

🌸 NAME 🌸

snd_pcm_chmap_substream — get the PCM substream assigned to the given chmap info. 🎀

✨ SYNOPSIS ✨

struct snd_pcm_substream * snd_pcm_chmap_substream (struct snd_pcm_chmap
*info , unsigned int idx );

🦋 ARGUMENTS 🦋

• info — chmap information. Like, the chmap info you're handing over. 💅
• idx — the substream number index. The little number that says which substream you mean. 🔢

💫 RETURN 💫

It returns the matched PCM substream, or NULL if not found. That's the whole vibe: matched substream if it's there, NULL if it's not. 😭

🌈 SEE ALSO 🌈

Kernel file: ./include/sound/pcm.h

• 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_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)
• pcm_format_to_bits(9)
• pcm_for_each_format(9)

okay bye bestie 💅 — this page is from ./include/sound, dated October 2026, for snd_pcm_chmap_substream(9). 🫶