STRUCT VDEC_H264_SLICE_INST(9)

💖 NAME 💖

struct vdec_h264_slice_inst — the h264 decoder instance, bestie. that's the whole vibe ✨

🌸 SYNOPSIS 🌸

okay so this is the struct, and no i did not skip a single field, we're listing everything:

struct vdec_h264_slice_inst {
    unsigned int slice_dec_num;
    struct mtk_vcodec_dec_ctx *ctx;
    struct mtk_vcodec_mem pred_buf;
    struct mtk_vcodec_mem mv_buf[H264_MAX_MV_NUM];
    struct vdec_vpu_inst vpu;
    union {
      struct {
        struct vdec_h264_slice_vsi *vsi;
        struct vdec_h264_slice_vsi *vsi_core;
        struct vdec_h264_slice_vsi vsi_ctx;
      };
      struct {
        struct vdec_h264_slice_vsi_ext *vsi_ext;
        struct vdec_h264_slice_vsi_ext *vsi_core_ext;
        struct vdec_h264_slice_vsi_ext vsi_ctx_ext;
      };
    };
    struct vdec_h264_slice_lat_dec_param h264_slice_param;
    unsigned int resolution_changed;
    unsigned int realloc_mv_buf;
    unsigned int cap_num_planes;
    struct v4l2_h264_dpb_entry dpb[16];
    bool is_field_bitstream;
    int (*decode)(void *h_vdec, struct mtk_vcodec_mem *bs, struct vdec_fb *unused, bool *res_chg);
};

like… look at it. she's structured. she's iconic. 💅

🎀 Members 🎀

okay breaking down every single one, no cap:

• slice_dec_num — the number of frames to be decoded. that's it, that's the count 🌈
• ctx — points to mtk_vcodec_dec_ctx. your context bestie 🫶
• pred_buf — the HW working prediction buffer
• mv_buf — the HW working motion vector buffer
• vpu — a VPU instance, slay
• {unnamed_union} — anonymous. she has no name, she simply is 💀
• {unnamed_struct} — anonymous (the first one, the non-ext crowd)
• vsi — the vsi used for lat
• vsi_core — the vsi used for core
• vsi_ctx — the vsi data for this decoding context
• {unnamed_struct} — anonymous (again — second one, the extended elect ✨)
• vsi_ext — the extended vsi used for lat
• vsi_core_ext — the extended vsi used for core
• vsi_ctx_ext — the extended vsi data for this decoding context
• h264_slice_param — the parameters that the hardware uses to decode. literally the whole instruction manual for the silicon 🔥
• resolution_changed — resolution changed 👀
• realloc_mv_buf — reallocate the mv buffer
• cap_num_planes — number of capture queue plane
• dpb — the decoded picture buffer, used to store reference buffer information
• is_field_bitstream — > heads up bestie: field bitstream is not supported, only frame. so if you were thinking about fields… don't 🙈
• decode — the lat decoder pointer, for different architectures. one pointer, many architectures, main character energy 👑

🦋 SEE ALSO 🦋

• Kernel file ./drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_h264_req_multi_if.c
• 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_vsi_ext(9)

like, read them. iykyk 📚

and that's the page!! sourced from ./drivers/media/platform/media..., dated October 2026, and yes the footer still says struct vdec_h264_slice_inst(9) because some things are eternal 💜

okay bye bestie, go decode something gorgeous 🌸🧚⭐