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The accept loop no longer awaits each session inline — it spawns each onto a JoinSet, bounded by a semaphore (--max-concurrent, default 4: a NVENC session bound; overflow clients wait in QUIC's accept backlog until a slot frees). The QUIC handshake stays in the accept loop so a failed handshake (e.g. a pin mismatch where the client aborts) doesn't consume a session slot or block accepting the next client; the slow part (control handshake, pairing, the capture/encode pipeline) runs in the spawned task. Each session already had its own virtual output + NVENC encoder; the host-lifetime input/audio/mic services stay shared — the natural "multiple devices viewing/controlling the same desktop" semantic on kwin/mutter/wlroots. gamescope's independent-desktops (per-session input/audio) isolation is a follow-up. New M3Options.max_concurrent + the `--max-concurrent` CLI flag. Validated live (GNOME box): two clients connected at once -> two independent Mutter virtual outputs (720p60 + 1080p60) streaming simultaneously (39 MB + 48 MB). All 61 host tests green (the c_abi/pairing tests exercise the new loop + the failed-handshake-doesn't-count semantics). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
74 lines
4.8 KiB
Markdown
74 lines
4.8 KiB
Markdown
---
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title: "Status & Progress"
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description: "Where the work stands, what's live on each box, and a running progress log."
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---
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The living progress tracker. Milestone-level status lives in [`CLAUDE.md`](https://github.com)
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and the design in the [Implementation Plan](/docs/implementation-plan); this page is the
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**current state + a dated log** of what landed, kept up to date as work happens. Newest first.
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## Milestones at a glance
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| Milestone | State |
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|---|---|
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| **M1** — `punktfunk-core` + C ABI (protocol · FEC · crypto) | ✅ complete & hardened |
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| **M2** — GameStream host (Moonlight-compatible) | ✅ working end-to-end; HDR/surround-audio polish open |
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| **M3** — `punktfunk/1` native protocol (QUIC control + UDP data) | ✅ full session planes, validated live |
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| **M4** — native client decode + present (Apple first) | 🟡 stage 1 done (first light); stage-2 presenter next |
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## Live on the boxes
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| Box | Role | Compositor | Notes |
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|---|---|---|---|
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| **home-worker-2** (dev) | KDE/KWin appliance | kwin (headless Plasma) | QEMU VM, passthrough RTX 5070 Ti; `serve --native` user unit |
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| **home-worker-3** (GNOME) | GNOME/Mutter appliance | mutter (RecordVirtual) | RTX 4090; autologin GNOME Wayland; `serve --native` user unit. See [GNOME Box Setup](/docs/gnome-box) |
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| **home-bazzite-1** | SteamOS-like host | gamescope | host-managed Steam session at client mode. See [Bazzite Setup](/docs/bazzite) |
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All three appliances advertise over mDNS (`_punktfunk._udp`) and require PIN pairing by default.
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## Progress log
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### 2026-06-12
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- **Concurrent sessions** — the host no longer serves one client at a time. The accept loop spawns
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each session (`JoinSet`), bounded by `--max-concurrent` (default 4, a NVENC bound; overflow waits
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in the accept queue). Each session keeps its own virtual output + encoder; they share the
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host-lifetime input/audio/mic services — i.e. **multiple devices viewing/controlling the same
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desktop** on kwin/mutter/wlroots. Validated live on the GNOME box: two clients connected at once
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→ **two independent Mutter virtual outputs (1280×720 + 1920×1080) streaming simultaneously**
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(39 MB + 48 MB). gamescope's *independent-desktops* (multi-user) isolation — per-session
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input/audio — is a follow-up.
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- **Apple client latency HUD** — `PunktfunkConnection.clockOffsetNs` (from the C-ABI getter) +
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`LatencyMeter` surface a skew-corrected **capture→client-receipt** p50/p95 in the macOS HUD: the
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first cross-machine latency the real Apple client reports. (Stage-1 `AVSampleBufferDisplayLayer`
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has no present callback, so decode→present is excluded — that needs the stage-2 presenter.)
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Needs an `xcframework` rebuild + `swift test` on the Mac to validate.
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- **Skew handshake in the connector + C ABI** — `quic::clock_sync` is now a shared core helper used
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by both the reference client and `NativeClient`; the connector runs it at connect and exposes the
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host clock offset over the C ABI (`punktfunk_connection_clock_offset_ns`). This is the substrate
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the Apple client needs for the decode→present (glass-to-glass) term.
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- **Wall-clock skew handshake** (`ClockProbe`/`ClockEcho`, 8 NTP rounds after `Start`) — makes the
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client's capture→reassembled latency valid **cross-machine**. Validated GNOME box → dev box:
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offset −1.57 ms removed, **p50 1.30 ms** skew-corrected. (`05bc9ab`)
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- **Native LAN auto-discovery** — host advertises `_punktfunk._udp` (TXT: fingerprint, pairing,
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proto); `punktfunk-client-rs --discover` lists hosts. Validated cross-LAN. (`4fff464`)
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- **Third test box stood up** — home-worker-3 (Ubuntu 26.04, RTX 4090, GNOME 50): first GNOME/Mutter
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zero-copy streaming on a real desktop; **1 Gbps probe clean** (625 MB/5 s, `send_dropped=0`).
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Two physical-NVIDIA gotchas documented in [GNOME Box Setup](/docs/gnome-box).
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- **Encode|send thread split** validated on real NIC (`send_dropped=0` at 720p60 / 1080p120). (`b295a5b`)
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### Earlier (see roadmap + git log)
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- **1 Gbps data plane**: batched `sendmmsg`/`recvmmsg` + microburst-cap paced send thread.
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- **Boot appliance**: headless KDE session + host systemd units (no login).
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- **Speed test + settable bitrate**: negotiation + bandwidth probe (host side).
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- **DualSense** UHID + haptics; gamepads live; mic uplink; AV1 + surround (unit/live-capture tested).
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## In flight / next
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See the [Roadmap](/docs/roadmap) for the ordered list. Near-term:
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- **True glass-to-glass**: Apple client present-stamp (decode→present) + host render→capture term.
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- **Apple stage-2 presenter** (`VTDecompressionSession` → `CAMetalLayer`).
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- **Mandatory PIN pairing + delegated pairing approval** (an already-paired device approves a new one).
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- **gamescope multi-user isolation** — per-session input/audio so concurrent sessions are independent
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desktops (the shared-desktop multi-view case landed).
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- **bazzite** kept up to date (currently offline; one rebuild behind).
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