STRUCT STREAM_INFO(9)

💖 struct stream_info(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — this one's all about struct stream_info, the lil' glow-up container that holds the stream information. it's giving "everything you need to know about one stream, in one struct" 🎀

🌸 SYNOPSIS 🌸

struct stream_info {
    unsigned int            status;
    unsigned int            prev;
    unsigned int            resume_status;
    unsigned int            resume_prev;
    struct mutex            lock;
    struct snd_sst_alloc_mrfld alloc_param;
    void *pcm_substream;
    void (*period_elapsed)(void *pcm_substream);
    unsigned int            sfreq;
    u32 cumm_bytes;
    void *compr_cb_param;
    void (*compr_cb)(void *compr_cb_param);
    void *drain_cb_param;
    void (*drain_notify)(void *drain_cb_param);
    unsigned int            num_ch;
    unsigned int            pipe_id;
    unsigned int            task_id;
 };

like, look at her. seventeen fields. main character energy fr fr 👑

🦋 Members 🦋

• status — the stream's current state, right here, right now 💅
• prev — the stream's prev state, aka where she just came from
• resume_status — the current state you gotta restore on resume 😴
• resume_prev — the prev state you gotta restore on resume too, no cap
• lock — the stream mutex, here to protect the state 🫶 don't skip her
• alloc_param — the parameters used for stream (re-)allocation 🔁
• pcm_substream — the PCM substream 🎵
• period_elapsed — the PCM period elapsed callback ⏰
• sfreq — the stream sampling freq 🎚️
• cumm_bytes — the cummulative bytes decoded 📊

ngl the rest of the fields up in the SYNOPSIS (compr_cb_param, compr_cb, drain_cb_param, drain_notify, num_ch, pipe_id, task_id) aren't spelled out in the Members list on this page — so we're not gonna make anything up about them 🙈 the struct's right there if u need the exact declarations 💖

⭐ SEE ALSO ⭐

Kernel file ./sound/soc/intel/atom/sst/sst.h and friends, go give 'em a read iykyk:

• struct sst_block(9)
• struct sst_fw_header(9)
• struct fw_module_header(9)
• struct fw_block_info(9)
• struct intel_sst_drv(9)

and that's the whole vibe, bestie 🫶 this lil' page comes to you from the source ./sound/soc/intel/atom/sst, dated October 2026, and yes she's still rocking the struct stream_info(9) title 💜 slay, go read some kernel source 💀✨