ReLimiter v3.1.2

New Features

• Added cadence metering — measures actual presentation cadence from DXGI frame statistics with adaptive bias correction for the scheduler
• Added DX11 flip model override — forces bitblt swapchains to FLIP_DISCARD for true VRR operation and reduced DWM composition latency
• Added system hardening — MMCSS present-thread registration, GPU scheduling priority, Win11 power throttling bypass, DWM MMCSS opt-in
• Added Reflex latency feedback — reads NvAPI_D3D_GetLatency ring buffer for GPU frame time and active render time, used as cadence bias source when available

Bug Fixes

• Fixed crash (0xC0000005) during DX12 launcher → Vulkan gameplay transition (e.g. Red Dead Redemption 2) — on_present was reading stale cached API from SwapMgr_GetActiveAPI(), causing a VkSwapchainKHR to be cast as IDXGISwapChain* and dereferenced as a COM vtable. Now derives the API directly from the presenting swapchain's device.
• Fixed FPS cap not enforcing during menus, cutscenes, and loading screens in DX12 Reflex games (e.g. Monster Hunter Stories 3, Expedition 33) — falls back to present-based enforcement when NvAPI/PCL markers stop flowing
• Fixed false-positive Frame Generation detection in Reflex-only games (e.g. MH Stories 3) — added s_setoptions_ever_called guard so GetState doesn't read uninitialized FG state
• Fixed deferred FG inference for games that never call GetState (e.g. Horizon Forbidden West) — 3-second confirmation window promotes or revokes FG presenting based on GetState behavior
• Fixed Streamline swapchain unwrap crash — disabled TryStreamlineUnwrap to prevent reference count mismatch causing E_ACCESSDENIED on swapchain recreation
• Fixed stale NvAPI device pointer crash — clears g_dev on device destroy, captures from SetLatencyMarker when SetSleepMode is never called
• Added SEH exception handling in correlator QueryFrameStatistics and streamline hook detours

Improvements

• Simplified correlator — major rewrite replacing complex calibration/sequencing with a direct DXGI stats source
• Reworked feedback system — cadence meter integration replacing raw correlator-based feedback, with Reflex ring buffer as preferred bias source
• Reworked scheduler — simplified overload detection, improved deadline catch-up logic, added interval-change detection for FG/FPS transitions
• Improved hardware spin loop with better TSC calibration and method detection
• Simplified stress detector interface
• Added VSync hook improvements for DX11/DX12
• Added vblank thread enhancements
• Improved PCL marker hooks with deadline snapshot before enforcement