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Video codecs: Adding AV1 stateless video decoder support to Linux
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this post was submitted on 08 Sep 2023
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It's not stateless end-to-end, it just means the client needs to keep track and pass the state rather than drivers or hardware
I'm not 100% on the motivation but from an architectural standpoint it does make sense - your software can now do many new and weird things without a hardware change
One example I saw was allowing an arbitrary number of streams to be processed simultaneously, just passing the different context state for each stream