STRUCT H264_FB(9)

💖 struct h264_fb(9) — h264 decode frame buffer information 💖

okay bestie, gather round, because this one is a kernel API manual page (yes, (9) section, we're in the big leagues now) and it's literally just a struct that holds the frame buffer info for h264 decoding. that's the whole vibe. no cap. 🎀

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✨ SYNOPSIS ✨

struct h264_fb {
    u64 vdec_fb_va;
    u64 y_fb_dma;
    u64 c_fb_dma;
    s32 poc;
    u32 reserved;
 };

look at her. five members. impeccable alignment. she ate. 💅

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🌸 Members 🌸

here's the breakdown, one member at a time, because we respect each of them individually:

• vdec_fb_va — virtual address of struct vdec_fb. yeah, she's a VA, she's virtual, she's living her best life in address space.
• y_fb_dma — dma address of the Y frame buffer (luma). that's the brightness girlies 💡
• c_fb_dma — dma address of the C frame buffer (chroma). the colour girlies 🌈
• poc — picture order count of frame buffer. literally the frame's place in line, its whole timeline moment, main character energy.
• reserved — for 8 bytes alignment 🫶 it's not doing much but it's doing it perfectly. padding icon.

fr fr do not touch reserved. it's there for 8 bytes alignment and that's its entire personality. respect it.

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🦋 SEE ALSO 🦋

Kernel file:

./drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_h264_req_common.h

and the whole friend group, all of them, linked and everything:

• struct mtk_h264_dpb_info(9)
• mtk_vdec_h264_get_ref_list(9)
• mtk_vdec_h264_get_ctrl_ptr(9)
• mtk_vdec_h264_fill_dpb_info(9)
• mtk_vdec_h264_copy_sps_params(9)
• mtk_vdec_h264_copy_pps_params(9)
• mtk_vdec_h264_copy_slice_hd_params(9)
• mtk_vdec_h264_copy_scaling_matrix(9)
• mtk_vdec_h264_copy_decode_params(9)
• mtk_vdec_h264_update_dpb(9)
• mtk_vdec_h264_find_start_code(9)
• mtk_vdec_h264_get_mv_buf_size(9)

like okay, squad goals, the h264 crew showed up. 🔥👑

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and that's the page bestie, that's the whole thing, no notes 💜 — this one came straight out of ./drivers/media/platform/media... and it's dated October 2026, and if you need me i'll be right here, page struct h264_fb(9) forever and always ✨🧚