vdec_if_decode(9)

🌸 vdec_if_decode(9) 💅

okay bestie, welcome to the kernel API manual for vdec_if_decode — yes that's the page name and yes it's a whole manual page, ninth section, we're fancy now. Let's get into it ✨

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✨ NAME ✨

vdec_if_decode — trigger decode 🎬

Like, it literally just... triggers the decode. That's the whole vibe. Main character energy fr.

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🦋 SYNOPSIS 🦋

int vdec_if_decode (struct mtk_vcodec_dec_ctx *ctx , struct
mtk_vcodec_mem *bs , struct vdec_fb *fb , bool *res_chg );

That's it, that's the whole signature 🫶 four params, one int coming back at you.

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🎀 ARGUMENTS 🎀

• ctx [in] — the v4l2 context. it's giving "the setup", the whole situation you're working inside 💖
• bs [in] — input bitstream. the actual data going in 🔥
• fb [in] — frame buffer to store decoded frame. and here's the lil twist: when it's null, it means parse header only. so like, no buffer = just peeking at the header, no full decode. iykyk 👀
• res_chg [out] — resolution change. this one's an output bestie, so it's telling you something: it happens if the current bs have different picture width/height. so if the bitstream switched up its dimensions, you'll hear about it here 📐✨

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⭐ NOTE ⭐

To flush the decoder when reaching EOF, set input bitstream as NULL.

That's the trick, that's the move — EOF coming up? null that bs and let it flush 💅 don't forget it.

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🌈 RETURN 🌈

• 0 on success 🎉 slay
• -EIO on unrecoverable error 😭 that's the "something is deeply wrong and we cannot save it" one

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👑 SEE ALSO 👑

• Kernel file ./drivers/media/platform/mediatek/vcodec/decoder/vdec_drv_if.h enum
• vdec_fb_status(9)
• struct vdec_fb_node(9)
• vdec_if_init(9)
• vdec_if_deinit(9)
• vdec_if_get_param(9)

go read those too, they're all part of the same little family 🧚

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aaaand that's the page!! 🍓 this one came from ./drivers/media/platform/media... and the version/date stamp on it says October 2026, page vdec_if_decode(9). ty for coming to my ted talk, mwah 💜🦋✨