STRUCT VDEC_H264_SLICE_VSI_EXT(9)

💅 struct vdec_h264_slice_vsi_ext(9) — Kernel API Manual, but make it cute 🎀

okay so bestie, welcome to the Kernel API Manual page for struct vdec_h264_slice_vsi_ext — yes that name is a mouthful, no I will not be shortening it, it's iconic and we respect it 💖

---

✨ NAME ✨

struct vdec_h264_slice_vsi_ext — this is the extended shared memory situation for decode information exchange between SCP and Host (aka the shared data between host and firmware). it's literally giving bridge-between-two-worlds energy 🌉✨

---

🌸 SYNOPSIS 🌸

struct vdec_h264_slice_vsi_ext {
    struct vdec_h264_slice_mem bs;
    struct vdec_h264_slice_fb fb;
    struct vdec_h264_slice_mem ube;
    struct vdec_h264_slice_mem trans;
    struct vdec_h264_slice_mem row_info;
    struct vdec_h264_slice_mem err_map;
    struct vdec_h264_slice_mem slice_bc;
    struct vdec_h264_slice_mem mv_buf_dma[H264_MAX_MV_NUM];
    struct vdec_h264_slice_info_ext dec;
    struct vdec_h264_slice_lat_dec_param h264_slice_params;
 };

look at her. ten fields. all of them important. no cap 🫶

---

🦋 Members 🦋

• bs — input buffer info 🍓 (yes that's it, that's the whole description, keep it simple bestie)
• fb — the current y/c buffer, your main character of the frame 💅
• ube — buffer used to share date between lat and core 👀 (note: the original literally says "date" here — I'm not fixing it, I'm just respectfully pointing at it 🫣)
• trans — transcoded buffer used for core decode 🔥
• row_info — row info buffer 🌈
• err_map — error map buffer 💀 (when things go wrong, this is the receipts)
• slice_bc — slice buffer ✨
• mv_buf_dma — store hardware motion vector data, and lowkey the only array here — it's mv_buf_dma[H264_MAX_MV_NUM], so it's holding a whole squad of them 👑
• dec — decode information (AP-R, VPU-W) 🧚
• h264_slice_params — decode parameters used for the hw 💜

---

🔥 SEE ALSO 🔥

• Kernel file ./drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_h264_req_multi_if.c — go read the source, iykyk 📖
• enum vdec_h264_core_dec_err_type(9)
• struct vdec_h264_slice_lat_dec_param(9)
• struct vdec_h264_slice_info(9)
• struct vdec_h264_slice_vsi(9)
• struct vdec_h264_slice_share_info(9)
• struct vdec_h264_slice_fb(9)
• struct vdec_h264_slice_info_ext(9)
• struct vdec_h264_slice_inst(9)

it's giving "the whole friend group" fr fr 🌸💖

---

ngl bestie, if you made it this far you're officially a mediatek vcodec girlie now. wear it proudly 👑

---

sign-off time 🎀 this little gem lives at ./drivers/media/platform/media... and the docs are stamped October 2026 — so yeah, she's from the future and she's still iconic. k byeee, go decode something ✨💅🦋