STRUCT DMX_FILTER(9)

💅 struct dmx_filter(9) — Kernel API Manual, but make it make sense 💅

okay bestie, so this is a page from the Linux Kernel API Manual and it's literally about struct dmx_filter — the little icon that specifies a section header filter ✨

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🌸 NAME 🌸

struct dmx_filter — Specifies a section header filter. that's it, that's the whole job description 🎀

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🦋 SYNOPSIS 🦋

no cap, here's the whole struct, character for character:

struct dmx_filter {
    __u8 filter[DMX_FILTER_SIZE];
    __u8 mask[DMX_FILTER_SIZE];
    __u8 mode[DMX_FILTER_SIZE];
 };

she's compact, she's iconic, she has exactly three arrays 💜

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✨ Members ✨

• filter — a bit array holding the bits you want to be matched at the section header. it's giving "here's what I'm looking for" 🔍
• mask — the bits that are actually valid inside the filter bit array. lowkey the vibe check for which bits even count 💅
• mode — the mode of match, and this one needs a lil explanation bestie: if the bit is zero, it will match if equal (a positive match); if the bit is one, it will match if the bit is negated 🙈 so zero = "same please", one = "flip it" ✨

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💀 Note 💀

fr fr, all arrays in this struct have a size of DMX_FILTER_SIZE (16 bytes). all three. sixteen bytes each. consistency queen 👑

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🫶 SEE ALSO 🫶

literally go read these next, they're all in the Kernel file ./include/uapi/linux/dvb/dmx.h:

• enum dmx_output(9)
• enum dmx_input(9)
• enum dmx_ts_pes(9)
• struct dmx_sct_filter_params(9)
• struct dmx_pes_filter_params(9)
• struct dmx_stc(9)
• enum dmx_buffer_flags(9)
• struct dmx_buffer(9)
• struct dmx_requestbuffers(9)
• struct dmx_exportbuffer(9)

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and that's the whole page, bestie 🌈 this iconic little entry lives in ./include/uapi/linux/dvb, dated October 2026 — mwah, sending you a big kiss, go read the dmx headers, you're gonna slay 💖🎀🦋