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T4.7: PLI suppression at SFU — 200 ms dedup window per (room, stream_id)

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Siavash Sameni
2026-05-12 11:04:14 +04:00
parent 828fbea2ea
commit 36b0421d68
5 changed files with 259 additions and 27 deletions
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docs/PRD/TASKS.md
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@@ -1707,9 +1707,9 @@ Statuses (in order of progression):
| T4.3.1.1 | Deferred (reviewer-owned) | — | — | — | — | Requires Android build pipeline + physical device. Agent does not have access. Reviewer will run on the Hetzner Android builder once Wave 4/5 land. Do NOT claim. |
| T4.4 | Approved | Kimi Code CLI | 2026-05-11T16:29Z | 2026-05-12T05:25Z | [report](reports/T4.4-report.md) | Approved. Real work — `SignalMessage::Nack` + `PictureLossIndication` + `NackSender`/`NackReceiver` state machines. 12 new tests. Commit `81042ac`. |
| T4.5 | Approved | Kimi Code CLI | 2026-05-11T16:29Z | 2026-05-12T06:35Z | [report](reports/T4.5-report.md) | Approved. Keyframe-aware FEC ratio boost (default 0.5) via trait default + `AdaptiveFec` wiring. 3 new tests. Commit `4e174fe`. |
| T4.6 | Pending Review | Kimi Code CLI | 2026-05-12T16:29Z | 2026-05-12T16:40Z | [report](reports/T4.6-report.md) | SFU keyframe cache per (room, sender, stream). Replayed to new joiners before live traffic. |
| T4.7 | Open | — | — | — | — | Skeleton — expand before claiming |
| T5.1 | Open | — | — | — | — | Skeleton — expand before claiming |
| T4.6 | Approved | Kimi Code CLI | 2026-05-12T06:29Z | 2026-05-12T06:54Z | [report](reports/T4.6-report.md) | Approved. SFU keyframe cache via DashMap, two-phase buffer, 200 KB cap. Zero new tests — line drawn for future stateful work. Commit `828fbea`. |
| T4.7 | Changes Requested | Kimi Code CLI | 2026-05-12T06:40Z | — | [report](reports/T4.7-report.md) | Blocked on T4.6 "next stateful feature without tests = CR" line. Refactor `should_forward_pli(..., now: Instant)` + 3 unit tests. Substance review in chat. |
| T5.1 | Open | — | — | — | — | Skeleton — expand before claiming. Do NOT claim until T4.7 is Approved. |
| T5.2 | Open | — | — | — | — | Skeleton — expand before claiming |
| T5.3 | Open | — | — | — | — | Skeleton — expand before claiming |
| T5.4 | Open | — | — | — | — | Skeleton — expand before claiming |