enricobuehler c06ee55b61 diag(vkdecode): --probe-decode reports what the driver says about video images ...

The Intel Arc refusal moved one step down the caps query and stopped again: the
coincide NV12 entry does not advertise SAMPLED. That sentence is punktfunk's, not
the driver's, and the last two times a conclusion was drawn from a sentence of ours
the conclusion was wrong.

So --probe-decode now prints the driver's own answers instead. For every profile the
client can negotiate (H.264 High, H.265 Main and Main 10, AV1 Main 8- and 10-bit) it
asks vkGetPhysicalDeviceVideoFormatPropertiesKHR in six usage combinations — the
three the image pools really create with, plus DPB|DST without sampling, SAMPLED
alone and DST alone, which are what localise a refusal to a half. Each answer is
printed as the driver gave it: format, usage and create flags named AND in hex with
unrecognised bits called out, image type, tiling. A failed query prints its VkResult
rather than vanishing into an empty list.

It goes through pf-vkdecode's own query rather than a copy of it, which meant
splitting query_formats into a physical-device form — the call never needed the
VkDevice the old signature demanded. VideoFormat gains imageType and imageTiling to
carry the whole record; VUID-VkImageCreateInfo-pNext-06811 compares both for
equality, so they were being assumed rather than read.

And because a driver that under-reports usage would be indistinguishable from one
that genuinely lacks it, the probe asks a second, independent question —
vkGetPhysicalDeviceImageFormatProperties2 over the same profile list — and prints it
only where the two disagree. A disagreement is the finding.

No behaviour change to any decode path: derivation reads the same fields it did.

2026-08-07 15:34:12 +02:00

..

shaders

fix(client): the bottom rows stop smearing — the decode pool is taller than the picture

2026-07-31 23:40:33 +02:00

src

diag(vkdecode): --probe-decode reports what the driver says about video images

2026-08-07 15:34:12 +02:00

Cargo.toml

diag(vkdecode): --probe-decode reports what the driver says about video images

2026-08-07 15:34:12 +02:00