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0b1322d1c6
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The host requests a 32 MB SO_SNDBUF, but the kernel clamps it to net.core.wmem_max (~416 KB on a stock box) — so high-bitrate frames overflow the socket buffer and the host drops a large fraction of packets on send (measured 28.5% loss / 54k dropped at 1 Gbps to a clean LAN client on a fresh Bazzite box). scripts/99-punktfunk-net.conf fixes it (32 MB caps) but the packages never installed it. Ship it to /usr/lib/sysctl.d/ (auto-applied at boot by systemd-sysctl) and apply it in the deb/rpm postinst. This is the dominant cause of the sub-Gbps ceiling on an untuned host. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
154 lines
7.9 KiB
RPMSpec
154 lines
7.9 KiB
RPMSpec
################################################################################
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# punktfunk — low-latency desktop/game streaming host (RPM for Fedora / Bazzite)
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#
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# Builds `punktfunk-host` from source with cargo and installs the binary, the
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# uinput udev rule (virtual gamepads), the systemd *user* unit, and the headless
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# session helpers. Designed for COPR (build-from-SCM): COPR clones the repo and
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# runs this spec; `cargo build` fetches crates over the network (COPR allows it).
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#
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# DEPENDENCIES NOT IN BASE FEDORA:
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# * ffmpeg / ffmpeg-libs with NVENC — from RPM Fusion *nonfree*. Enable it in
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# the COPR project (External Repositories) and on the target host.
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# * The NVIDIA driver (libnvidia-encode / libEGL_nvidia) — present on Bazzite's
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# -nvidia images; on plain Fedora install akmod-nvidia + xorg-x11-drv-nvidia-cuda.
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#
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# Bazzite already ships gamescope, PipeWire and the NVIDIA stack, so on Bazzite the
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# only new runtime bits are ffmpeg-libs (RPM Fusion) + opus + libei.
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################################################################################
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Name: punktfunk
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# Version/Release are overridable so CI can stamp a rolling snapshot: a main build passes
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# --define "pf_version 0.0.1" --define "pf_release 0.ci42.gdeadbee"
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# (Release starting "0." sorts BEFORE the eventual "1" release), a v* tag passes the clean
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# version with "pf_release 1". A plain `rpmbuild` (or COPR) with no defines builds 0.0.1-1.
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Version: %{?pf_version}%{!?pf_version:0.0.1}
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Release: %{?pf_release}%{!?pf_release:1}%{?dist}
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Summary: Low-latency desktop/game streaming host (Moonlight-compatible + punktfunk/1)
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License: MIT OR Apache-2.0
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URL: https://git.unom.io/unom/punktfunk
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# COPR SCM builds provide the checkout; for a tarball build, drop a git archive here:
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Source0: %{name}-%{version}.tar.gz
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# punktfunk-host is Linux-only and links system FFmpeg/PipeWire/Opus.
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ExclusiveArch: x86_64 aarch64
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# The zerocopy FFI links the NVIDIA driver's libcuda.so.1; rpm's auto-dep generator would turn
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# that into a hard Requires on libcuda.so.1 (and we never want to pin the driver — NVENC/EGL come
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# from whatever NVIDIA stack the host runs, expressed below as the weak xorg-x11-drv-nvidia-cuda
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# Recommends). Drop it from the auto-Requires, mirroring the Debian package's NVIDIA filter.
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%global __requires_exclude ^libcuda\\.so.*$
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# --- Build toolchain ---------------------------------------------------------
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BuildRequires: cargo
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BuildRequires: rust
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BuildRequires: gcc
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BuildRequires: gcc-c++
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BuildRequires: clang
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BuildRequires: clang-devel
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BuildRequires: cmake
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BuildRequires: nasm
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BuildRequires: pkgconfig
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BuildRequires: systemd-rpm-macros
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# Link-time system libraries (the -sys crates probe these via pkg-config):
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BuildRequires: pkgconfig(libpipewire-0.3)
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BuildRequires: pkgconfig(libspa-0.2)
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BuildRequires: pkgconfig(wayland-client)
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BuildRequires: pkgconfig(xkbcommon)
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BuildRequires: pkgconfig(opus)
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# FFmpeg dev headers with NVENC — from RPM Fusion (ffmpeg-devel), NOT ffmpeg-free.
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# Version-agnostic: ffmpeg-sys-next auto-detects the installed FFmpeg, so this builds
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# against FFmpeg 7.x (libavcodec 61, e.g. Fedora 43 / Bazzite) or 8.x (libavcodec 62).
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BuildRequires: pkgconfig(libavcodec)
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BuildRequires: pkgconfig(libavformat)
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BuildRequires: pkgconfig(libavutil)
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# Zero-copy GPU path: src/zerocopy/ links libGL + libgbm (mesa) via hand-rolled FFI.
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BuildRequires: pkgconfig(gl)
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BuildRequires: pkgconfig(gbm)
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# It ALSO links the NVIDIA CUDA driver lib (-lcuda) via FFI, so libcuda.so must be present
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# at LINK time. A normal NVIDIA host (or Bazzite -nvidia) has it; a headless COPR/koji builder
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# without a GPU does NOT — point %build at the CUDA toolkit stub (…/stubs/libcuda.so) there,
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# e.g. `ln -s $(rpm -ql cuda-cudart-devel | grep stubs/libcuda.so | head -1) /usr/lib64/`.
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# (Proper fix tracked separately: make the cuda/gbm/GL FFI dlopen-based like khronos-egl.)
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# --- Runtime -----------------------------------------------------------------
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Requires: pipewire
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Requires: pipewire-pulseaudio
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Requires: wireplumber
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Requires: opus
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Requires: libei
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# FFmpeg runtime with NVENC (RPM Fusion). Weak-dep so the package installs even if
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# the user hasn't enabled RPM Fusion yet, but it WILL fail to encode without it.
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Recommends: ffmpeg-libs
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# A compositor to drive. Bazzite ships gamescope; the others are user choice.
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Recommends: gamescope
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Suggests: kwin
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Suggests: mutter
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# NVENC + GPU EGL come from the NVIDIA driver; on Bazzite the -nvidia image has it.
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Recommends: (xorg-x11-drv-nvidia-cuda if xorg-x11-drv-nvidia)
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%description
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punktfunk is a Linux-first, low-latency desktop and game streaming host. It speaks
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the Moonlight/GameStream protocol (pair a stock Moonlight client) and its own native
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punktfunk/1 protocol (GF(2^16) Leopard FEC + AES-GCM, mid-stream mode renegotiation,
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client microphone passthrough). Each session gets a virtual output at the client's
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exact resolution and refresh via a per-compositor backend (KWin, gamescope, Mutter,
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Sway/wlroots), captured zero-copy (dmabuf -> CUDA -> NVENC) and split-encoded above
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~1 Gpix/s. Input (mouse/keyboard/gamepads) is injected back into the session.
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%prep
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%autosetup -n %{name}-%{version}
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%build
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# Release build of the host binary only (the workspace also has the core lib + clients).
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# cargo fetches crates over the network; COPR build hosts allow this.
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export RUSTFLAGS="%{?build_rustflags}"
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cargo build --release -p punktfunk-host
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%install
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# Binary
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install -Dm0755 target/release/punktfunk-host %{buildroot}%{_bindir}/punktfunk-host
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# udev rule — /dev/uinput access for virtual gamepads (input group).
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install -Dm0644 scripts/60-punktfunk.rules %{buildroot}%{_udevrulesdir}/60-punktfunk.rules
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# UDP socket-buffer tuning (32 MB) — without it the kernel clamps the host's SO_SNDBUF to ~416 KB
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# and high-bitrate frames overflow it (send-side loss). systemd-sysctl applies it at boot.
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install -Dm0644 scripts/99-punktfunk-net.conf %{buildroot}%{_prefix}/lib/sysctl.d/99-punktfunk-net.conf
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# systemd *user* unit (the host runs in the graphical session, not as root).
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install -Dm0644 scripts/punktfunk-host.service %{buildroot}%{_userunitdir}/punktfunk-host.service
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# Headless session helpers + example config + OpenAPI doc (reference material).
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install -d %{buildroot}%{_datadir}/%{name}/headless
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install -Dm0755 scripts/headless/run-headless-kde.sh %{buildroot}%{_datadir}/%{name}/headless/run-headless-kde.sh
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install -Dm0755 scripts/headless/run-headless-sway.sh %{buildroot}%{_datadir}/%{name}/headless/run-headless-sway.sh
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install -Dm0644 scripts/host.env.example %{buildroot}%{_datadir}/%{name}/host.env.example
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install -Dm0644 packaging/bazzite/host.env %{buildroot}%{_datadir}/%{name}/host.env.bazzite
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install -Dm0644 docs/api/openapi.json %{buildroot}%{_datadir}/%{name}/openapi.json
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%files
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%license LICENSE-MIT LICENSE-APACHE
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%doc README.md docs/implementation-plan.md packaging/README.md
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%{_bindir}/punktfunk-host
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%{_udevrulesdir}/60-punktfunk.rules
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%{_prefix}/lib/sysctl.d/99-punktfunk-net.conf
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%{_userunitdir}/punktfunk-host.service
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%dir %{_datadir}/%{name}
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%{_datadir}/%{name}/*
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%post
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# Reload udev so /dev/uinput picks up the new rule without a reboot (best-effort).
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udevadm control --reload-rules 2>/dev/null || :
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udevadm trigger --subsystem-match=misc 2>/dev/null || :
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# Apply the UDP socket-buffer tuning (also auto-applied at boot by systemd-sysctl; on rpm-ostree
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# it takes effect on the next boot into the layered deployment).
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sysctl -p %{_prefix}/lib/sysctl.d/99-punktfunk-net.conf >/dev/null 2>&1 || :
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echo "punktfunk installed. Add yourself to the 'input' group (sudo usermod -aG input \$USER)"
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echo "then enable the host: systemctl --user enable --now punktfunk-host"
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echo "Config: cp %{_datadir}/%{name}/host.env.bazzite ~/.config/punktfunk/host.env"
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%changelog
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* Wed Jun 10 2026 punktfunk <noreply@anthropic.com> - 0.0.1-1
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- Initial RPM: punktfunk-host + udev rule + systemd user unit + headless helpers.
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