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feat(host): PyroWave capture advertises the Vulkan device's dmabuf modifiers
The pyrowave passthrough rode VAAPI's LINEAR-only modifier policy, which
starves it on Mutter+NVIDIA (tiled-only allocations → the compositor
declines the offer → CPU capture fallback). The encoder imports through
VK_EXT_image_drm_format_modifier, not libva, so the capture now extends
the advertisement with every single-memory-plane modifier the PyroWave
device samples from (probed via DrmFormatModifierPropertiesListEXT with
the same device selection as the encoder).

Live on .21 (Mutter+NVIDIA, RTX 5070 Ti): 7 modifiers advertised, the
compositor negotiated block-linear (216172782120099861), no CPU
downgrade, and the encoder's per-buffer import cache populated exactly
as designed (8 PipeWire pool buffers imported once, silent reuse after).
Zero-copy session numbers: static 60 fps, e2e 2.9-3.0 ms p50 (p95 3.4),
host stage 1.6 ms; full-window motion 60 fps at ~80 Mb/s all-intra,
decode ~1 ms. Also neutralizes the VAAPI-specific wording in the
passthrough hand-off log.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-15 09:30:59 +02:00
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