Make a Match-window resize deliberate instead of a stutter: blur the live
stream and show a spinner while the host rebuilds its virtual display +
encoder and VideoToolbox re-inits on the new-mode IDR. No new protocol —
driven entirely by existing client signals.
- ResizeIndicator (pure core, unit-tested): START = follower steering,
END = a decoded frame at the target size, TIMEOUT = 2.5s safety net for a
rejected/capped switch that never yields a new-size frame; re-arms only on
a CHANGED target, not a repeated same-size drag.
- MatchWindowFollower.onResizeTarget fires the instant the window differs
from the live mode (deduped via lastSteered); a new onDecodedSize callback
threads each new-mode IDR's coded dims through StreamPump/Stage2Pipeline →
SessionPresenter → both stream views.
- SessionModel gains @Published resizing (+ resizeTargeted/resizeDecoded, a
tick on the 1 Hz stats timer, reset on disconnect); ContentView blurs the
stream 16px and overlays ResizeIndicatorView while resizing (the 32px
trust-prompt blur is unchanged and takes precedence).
tvOS declares the props but never fires the follower (it drives modes via
AVDisplayManager), so the overlay stays dormant there. Pure core verified on
the Linux toolchain; full AppKit/UIKit build pending on a Mac.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
design/midstream-resolution-resize.md Phase 2, Apple client. The stream mode
follows the session window/scene: a windowed macOS window resize or an iPad
Stage Manager / Split View scene change renegotiates the host's virtual
display + encoder via the existing PunktfunkConnection.requestMode, so a
windowed session streams native-resolution pixels instead of scaling.
Decode/present need nothing — VideoToolbox recreates its session on the
keyframe-derived format-description change (§1 table).
- MatchWindowFollower (new): the shared D2 trigger discipline — physical
pixels even-floored + clamped ≥320×200, debounce to resize-end, ≥1 s
between requests, skip a size equal to the live mode, request each distinct
size at most once (stops re-asking a rejected size / looping on a host
rollback). Pure normalize/request core is unit-tested (MatchWindowTests).
- macOS StreamLayerView: fed from layoutPresenter() (bounds → convertToBacking),
guarded to once-in-a-window.
- iOS StreamViewController: fed from viewDidLayoutSubviews (bounds × render
scale); iOS-only (iPhone fullscreen no-ops, tvOS uses AVDisplayManager).
- Settings: "Match window" toggle in the Stream mode section (iOS + macOS),
DefaultsKey.matchWindow, read per session by the follower.
Verified on a Linux Swift 6.1.2 toolchain (the app target needs AppKit/UIKit,
unavailable here): the real MatchWindowFollower.swift type-checks in Swift 5
mode against a connection stub, and the pure discipline + the follower's
decision path pass a standalone harness (drag-settle + grow → exactly two
switches, refresh preserved, no re-request loop). A full build + on-device run
(macOS window, iPad Stage Manager) remains for a Mac.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler