STRUCT S5P_JPEG_CTX(9)

💖 struct s5p_jpeg_ctx(9) — the device context data 💖

okay bestie, welcome to the Kernel API Manual ✨ this one's a lil struct page and honestly it's giving backstage-pass energy: it's literally the device context data for the s5p JPEG thing, like the little purse where the driver keeps all its stuff 🎀

✨ SYNOPSIS ✨

struct s5p_jpeg_ctx {
    struct s5p_jpeg         *jpeg;
    unsigned int            mode;
    unsigned short          compr_quality;
    unsigned short          restart_interval;
    unsigned short          subsampling;
    struct s5p_jpeg_q_data  out_q;
    struct s5p_jpeg_q_data  cap_q;
    unsigned int            scale_factor;
    struct v4l2_rect        crop_rect;
    struct v4l2_fh          fh;
    bool hdr_parsed;
    bool crop_altered;
    struct v4l2_ctrl_handler ctrl_handler;
    enum s5p_jpeg_ctx_state state;
 };

like look at her. fourteen fields. main character struct fr fr 👑

🌸 Members 🌸

bestie these are the fields one by one, no skipping, we're doing the whole roster because every single one matters 💅

• jpeg — the JPEG IP device for this context 🦋
• mode — compression (encode) operation or decompression (decode) — so like, which direction we're going, iykyk
• compr_quality — destination image quality in compression (encode) mode ✨
• restart_interval — JPEG restart interval for JPEG encoding ⭐
• subsampling — subsampling of a raw format or a JPEG 🎀
• out_q — source (output) queue information 🌈
• cap_q — destination (capture) queue queue information 💜
• scale_factor — scale factor for JPEG decoding 🔥
• crop_rect — a rectangle representing crop area of the output buffer 🫶
• fh — V4L2 file handle 🙈
• hdr_parsed — set if header has been parsed during decompression 💀
• crop_altered — set if crop rectangle has been altered by the user space 😭
• ctrl_handler — controls handler 👑
• state — state of the context 🌸

ngl the two bool flags (hdr_parsed and crop_altered) are literally just "did this happen yet" checkboxes and honestly? relatable. we love a simple yes/no queen 💖

🧚 SEE ALSO 🧚

okay so if you wanna keep reading (and you SHOULD, bestie, this is the good stuff), go check out the kernel file ./drivers/media/platform/samsung/s5p-jpeg/jpeg-core.h and these lil sibling structs:

• struct s5p_jpeg(9)
• struct s5p_jpeg_fmt(9)
• struct s5p_jpeg_marker(9)
• struct s5p_jpeg_q_data(9)
• struct s5p_jpeg_buffer(9)
• struct s5p_jpeg_addr(9)

and that's the whole page, periodt 💅 this lil icon came to you from ./drivers/media/platform/samsu..., dated October 2026, filed under struct s5p_jpeg_ctx(9) — go be iconic with it, mwah 🫶✨