nal_h264_write_sps(9)

✨ nal_h264_write_sps ✨

okay so bestie, this one lives in the Kernel API Manual and it's literally the glow-up artist that turns your SPS into RBSP format 💅 if you're reading this you're probably deep in H.264 land and honestly? respect.

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🎀 NAME 🎀

nal_h264_write_sps — write that SPS NAL unit straight into RBSP format, no cap ✨

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🦋 SYNOPSIS 🦋

ssize_t nal_h264_write_sps (const struct device *dev , void *dest ,
size_t n , struct nal_h264_sps *sps );

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🌸 ARGUMENTS 🌸

• dev — the device pointer, your main character 🫶
• dest — the buffer that gets filled with RBSP data, this is where the magic lands 💖
• n — maximum size of dest, in bytes. yes bestie, in bytes ⭐
• sps — the struct nal_h264_sps you wanna convert to RBSP, the little guy going in 🧚

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💜 DESCRIPTION 💜

Convert sps to RBSP data and write it into dest. simple as that, iconic behaviour 🔥

here's the tea though: the size of the SPS NAL unit is not known in advance 😭 and this function will fail if dest doesn't hold sufficient space for the SPS NAL unit. so like… size your buffer properly or it's giving drama. you've been warned 💀

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🌈 RETURN 🌈

either the number of bytes written to dest, or a negative error code. slay if it's the first one 🎀

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⭐ SEE ALSO ⭐

Kernel file ./drivers/media/platform/allegro-dvt/nal-h264.c

• nal_h264_read_sps(9)
• nal_h264_write_pps(9)
• nal_h264_read_pps(9)
• nal_h264_write_filler(9)
• nal_h264_read_filler(9)

the whole NAL friend group fr fr 👑

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lowkey obsessed with how tidy ./drivers/media/platform/alleg... looks in the source line, and this page is dated October 2026 — nal_h264_write_sps(9) out here living in the future 💫 mwah, take care bestie 😘