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feat(host): enable GPU zero-copy by default on all backends

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Now that the per-capture worker subprocess makes an NVENC EGL/CUDA driver
fault survivable (design/zerocopy-worker-isolation.md), the reason the NVENC
zero-copy path stayed opt-in is gone. zerocopy::enabled() now defaults ON for
both GPU backends (was ON VAAPI / OFF NVENC). Fallbacks are intact: VAAPI's
one-shot CPU auto-downgrade (VAAPI-gated, never trips for NVENC) and NVENC's
per-capture fallback + worker-death latch.

Reframe the shipped host.env examples and setup guides to rely on the default
rather than force PUNKTFUNK_ZEROCOPY=1 (an explicit =1 skips the VAAPI
auto-downgrade).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Enrico Bühler
2026-07-06 10:33:30 +00:00
parent 7257bcb6a6
commit 9814368c8c
11 changed files with 33 additions and 27 deletions
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scripts/headless/run-headless-kde.sh
+2 -2
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@@ -13,8 +13,8 @@
# bash scripts/headless/run-headless-kde.sh [WxH] # default 1920x1080
#
# Then in another shell:
# WAYLAND_DISPLAY=wayland-kde XDG_CURRENT_DESKTOP=KDE PUNKTFUNK_ZEROCOPY=1 \
# punktfunk-host punktfunk1-host --source virtual --seconds 14400
# WAYLAND_DISPLAY=wayland-kde XDG_CURRENT_DESKTOP=KDE \
# punktfunk-host punktfunk1-host --source virtual --seconds 14400 # zero-copy is on by default
set -euo pipefail
RES="${1:-1920x1080}"