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Right now this just allocates a new buffer for every frame, uses it, then discards it immediately. This is not optimal, either dav1d should start reusing buffers internally or we need to pool them in dav1dplay. As it stands, this is not really a performance gain. I'll have to investigate why, but my suspicion is that seeing any gains might require reusing buffers somewhere. Note: Thrashing buffers is not as bad as it seems, initially. Not only does libplacebo pool and reuse GPU memory and buffer state objects internally, but this also absolves us from having to do any manual polling to figure out when the buffer is reusable again. Creating, using and immediately destroying buffers actually isn't as bad an approach as it might otherwise seem. It's entirely possible that this is only bad because of lock contention. As said, I'll have to investigate further...
490a1420
