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## Link to GitHub Issue or related Pull Request, if one exists Building on #745 ## Description of change With `-wasapishared`, some users see `AUDCLNT_E_BUFFER_TOO_LARGE` (`0x88890006`). The existing one-device-period buffer clamp wasn't enough on endpoints with a small shared buffer; the shared buffer is double-buffered, so a full-buffer write often exceeds the free space. ### Fix Added a FIFO bridge to `SharedRedirect` that decouples the game's per-event writes from the shared engine's clock: - **`GetBuffer`** hands the game a pointer into the FIFO tail to write in place. - **`ReleaseBuffer`** commits the write and drains `min(pending, device_free)` frames to the device - so a write can never exceed what the device accepts, structurally preventing the overflow on any endpoint. - **`GetCurrentPadding`** reports the FIFO fill level (capped to the reported buffer size) so poll/timer-driven games pace correctly against the virtual buffer. ## Testing