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git://f0xx.org/android_cast
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33 lines
1.3 KiB
Markdown
33 lines
1.3 KiB
Markdown
# Android Cast — implementation roadmap
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## Stream protection (FEC / NACK)
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| Item | Status |
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|------|--------|
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| GF(256) Reed–Solomon + `ProtectionEnvelope` v1 (monolithic) | Done |
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| **v2 per-shard FEC** (`FecShardWire`, one ACUD message per RS shard) | Done |
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| NACK + `RetransmitCache` + `MSG_NACK` | Done |
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| Post-handshake negotiation | Done |
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| Backward compat (defer FEC until negotiated; ignore foreign FEC/NACK) | Done |
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| Default protection **NONE** (stable cast) | Done |
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| Integration tests (`FecShard*`, `UdpCastTransportFecTest`) | Done |
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| Lab soak under loss (HY300 / BL6000) | TODO (manual) |
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| NACK rate limit / backoff | Done (`NackRateLimiter`) |
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| `MSG_FEC_NACK` by groupId (optional) | Deferred |
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Enable in **Settings → Stream protection (UDP)** on both sender and receiver, then reconnect.
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## libvpx / Opus / Speex
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| Item | Status |
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|------|--------|
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| `libandroidcast_codecs.so` + JNI probes | Done |
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| Cross-compile `libvpx.a` (`scripts/build-native-codecs.sh`) | Done |
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| JNI encode/decode in `libvpx_bridge.c` | Done (when `libvpx.a` linked per ABI) |
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| `LibvpxVideoEncoderSink` (surface + buffer) | Done |
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| libvpx decoder on receiver (`LibvpxCapableVideoDecoder`) | Done |
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| Surface → libvpx without MediaCodec passthrough on cast | Done (ImageReader) |
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| Opus / Speex build + sinks | TODO |
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See [ndk/README.md](../ndk/README.md).
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