Name: Implementing a Stateless V4L2 Decoder Driver: Architecture and Lessons Learned - SungHo Lee, Chips&Media
Start: 2026-08-11T17:15:00+0900
End: 2026-08-11T17:45:00+0900

11-12, August 2026
Seoul, South Korea
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Implementing a Stateless V4L2 Decoder Driver: Architecture and Lessons Learned - SungHo Lee, Chips&Media

Tuesday August 11, 2026 17:15 - 17:45 KST

Orchid 1

Stateless video decoding has become the standard approach in V4L2 using the Request API, but implementing a stateless decoder driver remains complex. It requires careful handling of codec parameters, buffer management, and coordination between userspace and the kernel.

This session presents a practical overview of implementing a stateless V4L2 decoder driver based on real development experience. It covers how SPS/PPS and per-frame parameters are passed from userspace, how reference frames are managed, and how hardware constraints are handled within a generic V4L2 framework.

We also discuss common pitfalls such as synchronization issues and buffer lifecycle management, and highlight key differences from traditional stateful decoders.

Attendees will gain a clear understanding of stateless decoder architecture and practical insights for developing robust V4L2 drivers.

Speakers

Sungho Lee

Senior Principal Researcher, Chips&Media

I am a software engineer specializing in Linux media and video codec driver development. I have hands-on experience implementing V4L2 drivers for hardware encoders and decoders, including stateless decoding and advanced codec controls such as ROI and QP mapping. My work focuses on... Read More →

Tuesday August 11, 2026 17:15 - 17:45 KST
Orchid 1

Linux

Open Source Summit Korea 2026

Sungho Lee

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