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[Improvement] Use VK_KHR_video_maintenance1 #53
Description
Motivation
VK_KHR_video_maintenance1 extension is pretty much supported by any Vulkan Video API encode-capable hardware.
It allows creating codec profile-independent picture buffers with VK_BUFFER_CREATE_VIDEO_PROFILE_INDEPENDENT_BIT_KHR, this allows simplifying code and also pixelforge wouldn't then need to own the input images, just read them directly like DMA-BUFs. (Also VK_IMAGE_CREATE_VIDEO_PROFILE_INDEPENDENT_BIT_KHR).
The extension also brings VK_VIDEO_SESSION_CREATE_INLINE_QUERIES_BIT_KHR, simplifies code a bit without needing separate begin/end command query pairs.
@hgaiser This would be good with or after #50 work, as it would touch the import API.
Device support
Windows
Linux
Activity
hgaiser commentedon Nov 2, 2026
Interesting! I'll have a look 👍
hgaiser commentedon Nov 4, 2026
Do I understand it correctly that this only helps if we're encoding RGB directly?
DatCaptainHorse commentedon Nov 5, 2026
@hgaiser It helps everywhere, especially with reducing the per-codec buffer/image code, since
VK_BUFFER_CREATE_VIDEO_PROFILE_INDEPENDENT_BIT_KHRandVK_IMAGE_CREATE_VIDEO_PROFILE_INDEPENDENT_BIT_KHRallow for profile (and codec) agnostic buffers + images.VK_VIDEO_SESSION_CREATE_INLINE_QUERIES_BIT_KHRreduces code a bit less, though might improve efficiency a bit as well.Best explained thru the extension doc I'd say: https://docs.vulkan.org/refpages/latest/refpages/source/VK_KHR_video_maintenance1.html