STRUCT VDEC_AV1_SLICE_VSI(9)

🎀 struct vdec_av1_slice_vsi(9) 🎀

okay so this is a page from the Kernel API Manual bestie, and it's all about struct vdec_av1_slice_vsi — the literal group chat between Main CPU and MicroP where they swap frame info. no cap, that's the whole job. 💅

✨ NAME ✨

struct vdec_av1_slice_vsi — exchange frame information between Main CPU and MicroP

🌸 SYNOPSIS 🌸

struct vdec_av1_slice_vsi {
    struct vdec_av1_slice_mem bs;
    struct vdec_av1_slice_work_buffer
work_buffer[AV1_MAX_FRAME_BUF_COUNT];
    struct vdec_av1_slice_mem cdf_table;
    struct vdec_av1_slice_mem cdf_tmp;
    struct vdec_av1_slice_mem rd_mv;
    struct vdec_av1_slice_mem ube;
    struct vdec_av1_slice_mem trans;
    struct vdec_av1_slice_mem err_map;
    struct vdec_av1_slice_mem row_info;
    struct vdec_av1_slice_fb fb;
    struct vdec_av1_slice_fb ref[V4L2_AV1_REFS_PER_FRAME];
    struct vdec_av1_slice_mem iq_table;
    struct vdec_av1_slice_mem tile;
    struct vdec_av1_slice_slot slots;
    s8 slot_id;
    struct vdec_av1_slice_frame frame;
    struct vdec_av1_slice_state state;
    u32 cur_lst_tile_id;
 };

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🦋 Members 🦋

like, every single one, no skipping, we don't do that here 🫶

• bs — the input buffer info
• work_buffer — the working buffer for hw
• cdf_table — the cdf_table buffer
• cdf_tmp — the cdf temp buffer
• rd_mv — the mv buffer — it's giving lat output, core input
• ube — the ube buffer
• trans — the transcoded buffer
• err_map — the err map buffer
• row_info — the row info buffer
• fb — the current y/c buffer
• ref — the ref y/c buffer
• iq_table — the iq table buffer
• tile — the tile buffer
• slots — slots info for each frame
• slot_id — the current frame slot id
• frame — the current frame info
• state — the status after decode done
• cur_lst_tile_id — the tile id for large scale

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💜 SEE ALSO 💜

the source of truth is the Kernel file, and it lives right here:

./drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_av1_req_lat_if.c

and then the whole friend group, iykyk — go read these too:

• struct vdec_av1_slice_init_vsi(9)
• struct vdec_av1_slice_mem(9)
• struct vdec_av1_slice_state(9)
• struct vdec_av1_slice_tile_group(9)
• struct vdec_av1_slice_scale_factors(9)
• struct vdec_av1_slice_frame_refs(9)
• struct vdec_av1_slice_gm(9)
• struct vdec_av1_slice_sm(9)
• struct vdec_av1_slice_seg(9)
• struct vdec_av1_slice_delta_q_lf(9)
• struct vdec_av1_slice_quantization(9)
• struct vdec_av1_slice_lr(9)
• struct vdec_av1_slice_loop_filter(9)
• struct vdec_av1_slice_cdef(9)
• struct vdec_av1_slice_mfmv(9)
• struct vdec_av1_slice_tile(9)
• struct vdec_av1_slice_uncompressed_header(9)
• struct vdec_av1_slice_seq_header(9)
• struct vdec_av1_slice_frame(9)
• struct vdec_av1_slice_work_buffer(9)
• struct vdec_av1_slice_frame_info(9)
• struct vdec_av1_slice_slot(9)
• struct vdec_av1_slice_fb(9)
• struct vdec_av1_slice_pfc(9)
• struct vdec_av1_slice_instance(9)

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bestie reminder: these are structs from the kernel tree, so if you're reading this on a different version, vibe check your own source before you trust a field name, k? 🙈

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and that's the whole page! 💖 it came out of ./drivers/media/platform/media... and it's dated October 2026, so like, future energy fr fr. stay iconic, go read your structs, mwah 💅✨🎀