v4l2_calc_timeperframe(9)

✨ v4l2_calc_timeperframe ✨

okay bestie, so this one's a kernel API manual page for v4l2_calc_timeperframe — like, the actual page name is v4l2_calc_timeperframe(9) if you're being formal about it 💅 — and it's genuinely the most "just do the math for me" little helper ever. let's get into it 🎀

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🌸 NAME 🌸

v4l2_calc_timeperframe — a helper function that calculates timeperframe based on v4l2_dv_timings fields. that's it, that's the whole vibe. she's a calculator with main character energy 🔥

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⭐ SYNOPSIS ⭐

struct v4l2_fract v4l2_calc_timeperframe (const struct v4l2_dv_timings
*t );

like, she hands you back a struct v4l2_fract and asks for a const struct v4l2_dv_timings *. simple exchange, no drama 🫶

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💖 ARGUMENTS 💖

• t — the timings for the video mode. yes queen, this is the whole input, she needs her timings and she needs them correct 👑

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🦋 DESCRIPTION 🦋

so what she actually does: she calculates the expected timeperframe using the pixel clock value and the horizontal/vertical measures. lowkey iconic math behavior ngl ✨

which means — and this is the part where you have to pay attention bestie 😭 — the v4l2_dv_timings structure must be correctly and fully filled. not half-filled. not "eh, close enough"-filled. correctly. and. fully. fr fr, no cap 💀

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🧚 SEE ALSO 🧚

• Kernel file ./include/media/v4l2-dv-timings.h — go read it, iykyk 📖
• v4l2_check_dv_timings_fnc(9)
• v4l2_valid_dv_timings(9)
• v4l2_enum_dv_timings_cap(9)
• v4l2_find_dv_timings_cap(9)
• v4l2_find_dv_timings_cea861_vic(9)
• v4l2_match_dv_timings(9)
• v4l2_print_dv_timings(9)
• v4l2_detect_cvt(9)
• v4l2_detect_gtf(9)
• v4l2_calc_aspect_ratio(9)
• v4l2_dv_timings_aspect_ratio(9)
• can_reduce_fps(9)
• struct v4l2_hdmi_colorimetry(9)

like a whole little friend group of timing functions, and honestly? obsessed 🌈

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quick vibe check 💅: everything above is exactly what the page says — don't go filling t halfway and then act surprised when the math comes out weird. she warned you 🎀

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and that's the whole page, bestie!! this lil gem lives in <code>./include/media</code>, dated October 2026, and its official title is <code>v4l2_calc_timeperframe(9)</code> — mwah, go calculate some frames 💜✨