STRUCT V4L2_JPEG_SCAN_HEADER(9)

💅 struct v4l2_jpeg_scan_header — JPEG scan header

Okay bestie, welcome to the Kernel API Manual ✨ — this is the page for struct v4l2_jpeg_scan_header, which is literally just the JPEG scan header. That's it, that's the vibe. Short page, iconic energy 🎀

✨ SYNOPSIS ✨

struct v4l2_jpeg_scan_header {
    u8 num_components;
    struct v4l2_jpeg_scan_component_spec
component[V4L2_JPEG_MAX_COMPONENTS];
 };

No cap, that's the whole struct 🫶 — two members, one of them's an array, and yes the V4L2_JPEG_MAX_COMPONENTS is capitalized because it's a macro and it knows it 👑

🌸 Members 🌸

• num_components — Ns 😭 that's the whole description, I'm not gonna lie to you bestie, that's literally what the page says. So: Ns. Make of that what you will 💀
• component — the component-specification, see v4l2_jpeg_scan_component_spec 🦋. It's an array of those, sized V4L2_JPEG_MAX_COMPONENTS, so you get one spec per component, standard procedure ✨

Fr fr if you're confused by num_components saying Ns, same bestie, same. The manual says what the manual says and I am not out here inventing facts 🙈

👑 SEE ALSO 👑

Kernel file ./include/media/v4l2-jpeg.h — go read it, it's giving source of truth 💖

• struct v4l2_jpeg_reference(9)
• struct v4l2_jpeg_frame_component_spec(9)
• struct v4l2_jpeg_frame_header(9)
• struct v4l2_jpeg_scan_component_spec(9)
• enum v4l2_jpeg_app14_tf(9)
• struct v4l2_jpeg_header(9)

Like honestly? That whole little family of JPEG structs is the friend group and this one's the scan-header one 🧚 collect them all, iykyk 🌈

And that's the page, periodt 💅 Big slay to ./include/media for hosting it, dated October 2026, filed under the struct v4l2_..._scan_header(9) name in the Kernel API Manual — mwah, go write some JPEG parsers bestie 🍓⭐