STRUCT DVB_DEMUX_FEED(9)

💅 struct dvb_demux_feed(9) — like, the whole Kernel API Manual, but make it make sense 🎀

okay so bestie, welcome to the glow-up of struct dvb_demux_feed(9) — it's a kernel API manual page, and today we're learning what this little struct actually is. no cap, it's genuinely iconic. 🦋

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✨ NAME ✨

struct dvb_demux_feed — literally describes a DVB field. that's the whole vibe. 🌸

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🌈 SYNOPSIS 🌈

here's the struct in all its main-character glory, copied exactly, do not touch:

struct dvb_demux_feed {
    union {
      struct dmx_ts_feed ts;
      struct dmx_section_feed sec;
    } feed;
    union {
      dmx_ts_cb ts;
      dmx_section_cb sec;
    } cb;
    struct dvb_demux *demux;
    void *priv;
    enum dvb_dmx_filter_type type;
    enum dvb_dmx_state state;
    u16 pid;
    ktime_t timeout;
    struct dvb_demux_filter *filter;
    u32 buffer_flags;
    enum ts_filter_type ts_type;
    enum dmx_ts_pes pes_type;
    int cc;
    bool pusi_seen;
    u16 peslen;
    struct list_head list_head;
    unsigned int index;
 };

like, look at those nested unions. the way that it's giving "two personalities, one struct." obsessed. 💜

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👑 Members 👑

the feed union 🍓

• feed — a union describing a digital TV feed bestie. depending on the feed type, it can be either feed.ts or feed.sec. pick your fighter. ✨
• feed.ts — a struct dmx_ts_feed pointer. TS feed only, so don't come for it if you're on section duty.
• feed.sec — a struct dmx_section_feed pointer. section feed only — the other half of the union, slay.

the cb union 🎀

• cb — a union describing digital TV callbacks. depending on the feed type, it can be either cb.ts or cb.sec. twin icons fr fr.
• cb.ts — a dmx_ts_cb callback function pointer. for TS feed only. 💫
• cb.sec — a dmx_section_cb callback function pointer. for section feed only. no crossover episodes.

the rest of the cast 💅

• demux — pointer to struct dvb_demux. the main character it answers to.
• priv — private data that can optionally be used by a DVB driver. it's giving "personal diary, do not read." 🙈
• type — type of the filter, as defined by enum dvb_dmx_filter_type.
• state — state of the filter as defined by enum dvb_dmx_state. vibe check, but official.
• pid — PID to be filtered. the actual thing you're stalking. 🔥
• timeout — feed timeout. clock is ticking bestie. ⭐
• filter — pointer to struct dvb_demux_filter.
• buffer_flags — buffer flags used to report discontinuity users via the DVB memory mapped API, as defined by enum dmx_buffer_flags. say that five times fast, i dare you.
• ts_type — type of TS, as defined by enum ts_filter_type.
• pes_type — type of PES, as defined by enum dmx_ts_pes.
• cc — MPEG-TS packet continuity counter. it's counting, that's its whole job, and it ate. 👑
• pusi_seen — if true, indicates that a discontinuity was detected. it is used to prevent feeding of garbage from the previous section. 🗑️ lowkey a hero for that.
• peslen — length of the PES (Packet Elementary Stream).
• list_head — head for the list of digital TV demux feeds.
• index — a unique index for each feed. can be used as a hardware pid filter index. every feed gets its own little name tag 🏷️✨

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🫶 SEE ALSO 🫶

go read these next, they're all in the kernel file ./include/media/dvb_demux.h:

• enum dvb_dmx_filter_type(9)
• enum dvb_dmx_state(9)
• struct dvb_demux_filter(9)
• struct dvb_demux(9)
• dvb_dmx_init(9)
• dvb_dmx_release(9)
• dvb_dmx_swfilter_packets(9)
• dvb_dmx_swfilter(9)
• dvb_dmx_swfilter_204(9)
• dvb_dmx_swfilter_raw(9)

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ngl bestie, this whole page lives in ./include/media, and it's dated October 2026 — so it's a little time traveler. 💀

and that's the tea on struct dvb_demux_feed(9) — you ate, you understood, periodt. 🌟🦋💖