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punktfunk/crates/punktfunk-android
enricobuehler de7b8ac282
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feat(android): video decode pipeline — NDK AMediaCodec → SurfaceView
M4 Android stage 1 (video). Pull HEVC access units from the connector and render
them to the SurfaceView entirely in Rust (NDK AMediaCodec → ANativeWindow) — no
per-frame JNI, honoring the native-thread hot-path invariant.

- crates/punktfunk-android: decode.rs (one-in/one-out AMediaCodec loop; in-band
  VPS/SPS/PPS so no out-of-band csd; dims from NativeClient::mode). SessionHandle
  now holds an Arc<NativeClient> + the decode thread; nativeStartVideo/nativeStopVideo.
- clients/android: connect screen (host/port) + full-screen SurfaceView stream
  screen — surfaceCreated -> nativeStartVideo, leaving -> stop + close.

Verified live (Android emulator -> m3-host on the LAN box, ABI v2): QUIC handshake,
8-round clock-skew sync, HEVC decoder configured at 1280x720, and the data plane
delivered + fed all 299 access units (the punktfunk/1 NAT hole-punch worked through
the emulator's SLIRP). Real-pixel render is pending a non-synthetic source:
`m3-host --source synthetic` emits dummy transport payloads (not HEVC), so the
decoder correctly produces nothing; `--source virtual` (a compositor on the host)
is needed to verify decode-to-screen.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-15 02:03:48 +02:00
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