STRUCT VIDTV_DEMOD_CNR_TO_QUAL_S(9)

🎀 struct vidtv...nr_to_qual_s(9) 🎀

okay so bestie, welcome to the Kernel API Manual — yes we're literally in the kernel docs rn, and no this isn't the scary part, i promise 🫶

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✨ NAME ✨

struct vidtv_demod_cnr_to_qual_s — the little struct whose whole entire job is mapping CNR values to a given combo of modulation and fec_inner. it's giving matchmaker but for signal quality 💅

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🌸 SYNOPSIS 🌸

struct vidtv_demod_cnr_to_qual_s {
    u32 modulation;
    u32 fec;
    u32 cnr_ok;
    u32 cnr_good;
 };

like, that's it. four lil u32s. lowkey iconic 👑

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🦋 Members 🦋

• modulation — see enum fe_modulation for what this one's about ✨
• fec — see enum fe_fec_rate, yep, that's the one 🌈
• cnr_ok — the S/N threshold where we go "okay the signal is OK". and listen — if you dip below this, there's a chance of losing sync. not me warning you, that's just the docs 😭
• cnr_good — the S/N threshold where the signal is officially strong and we can all relax 💖

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💜 Description 💜

so this struct matches up the 'good' and 'ok' CNR values, given whatever combination of modulation and fec_inner you're running. and yes — we might simulate some noise if the signal quality is not too good. dramatic? maybe. accurate? yes 🙈

the values were taken from libdvbv5, so you know they're not just vibes, they're sourced vibes ✨

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👑 SEE ALSO 👑

• Kernel file ./drivers/media/test-drivers/vidtv/vidtv_demod.h — go read it bestie, iykwim 💅
• struct vidtv_demod_config(9)
• struct vidtv_demod_state(9)

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that's the whole page, no cap 🍓 this little guy lives at ./drivers/media/test-drivers/v... and the docs are dated October 2026 — so yes, we're reading from the future, main character energy fr fr ⭐💀

k byeee, go fix your signal, you got this 💖🧚🎀