AnyPS5/docs/dev/debt/libSceHmd.md

libSceHmd technical debt

Silent stubs

• libSceHmd implements only the disconnected-headset path: initialization succeeds, device queries report NotDetected, and opening a device returns DeviceDisconnected. Headset support, tracking, rendering and additional HMD exports are not implemented; SDK-level ABI compatibility and in-game behaviour remain unverified.

Unknown function info

• libSceHmd internal and capture exports - input/output directions and argument registers are recovered for shared VR2D data, device binding, optical and serial queries, screen status and capture operations. VR2D records are 128 bytes, optical output 16, serial output 16, PU position output 20, crash-dump output 68, audio/video status 32, and reprojection debug outputs 216 or 1136. Payload field meanings and capture callback contracts remain incomplete; these structures use forward declarations.

• libSceHmd queries without a headset (libSceHmd) - the signatures, the distortion work memory (0x20000, aligned to 0x400) and reprojection buffer sizes (garlic 0x100000, onion 0x810, both aligned to 0x100), and the results of sceHmdGetFieldOfView, sceHmdGet2DEyeOffset, sceHmdGetInertialSensorData (HANDLE_INVALID once initialized; field of view checks its output for null first) and sceHmdGetAssyError (null output, then DEVICE_DISCONNECTED once initialized) follow shadPS4 (PS4) with no headset, not a PS5 measurement. Before initialization sceHmdGetFieldOfView returns NOT_INITIALIZED for a non-null output, where shadPS4 checks the handle first and returns HANDLE_INVALID. The third argument of sceHmdGetInertialSensorData is unnamed there and taken as a count

• sceHmdReprojectionStartWideNear (libSceHmd) - unknown signature

• sceHmdInternalDfuGetStatus (libSceHmd) - unknown signature

• sceHmdGetDistortionWorkMemoryAlign (libSceHmd) - unknown signature

• sceHmdReprojectionStartMultilayer (libSceHmd) - unknown signature

• sceHmdGetDistortionWorkMemorySize (libSceHmd) - unknown signature

• sceHmdReprojectionSetDisplayBuffers (libSceHmd) - unknown signature

• sceHmdInternalMirroringModeSetAspectDebug (libSceHmd) - unknown signature

• sceHmdDistortionGetCompoundEyeCorrectionCommand (libSceHmd) - unknown signature

• sceHmdDistortionGetCorrectionCommand (libSceHmd) - unknown signature

• sceHmdReprojectionAddDisplayBuffer (libSceHmd) - unknown signature

• sceHmdReprojectionInitialize (libSceHmd) - unknown signature

• sceHmdInternalGetDeviceInformationByHandle (libSceHmd) - unknown signature

• sceHmdInternalGetDeviceInformation (libSceHmd) - unknown signature

• sceHmdReprojectionStartCapture (libSceHmd) - unknown signature

• sceHmdInternalGetDefaultLedData (libSceHmd) - unknown signature

• sceHmdDistortionGetWideNearCorrectionCommand (libSceHmd) - unknown signature

• sceHmdDistortionInitialize (libSceHmd) - unknown signature

• sceHmdReprojectionStart (libSceHmd) - unknown signature

• sceHmdInternalCrashReportCancel (libSceHmd) - unknown signature

• sceHmdInternalSeparateModeOpen (libSceHmd) - unknown signature

• sceHmdDistortionGet2dVrCommand (libSceHmd) - unknown signature

• sceHmdGetWideNearDistortionCorrectionCommand (libSceHmd) - unknown signature

• sceHmdReprojectionStartMultilayer2 (libSceHmd) - unknown signature

• sceHmdGetDistortionCorrectionCommand (libSceHmd) - unknown signature

• sceHmdReprojectionStartWithOverlay (libSceHmd) - unknown signature

• sceHmdReprojectionStartWideNearWithOverlay (libSceHmd) - unknown signature

• sceHmdGetDistortionParams (libSceHmd) - unknown signature

• sceHmdReprojectionStart2dVr (libSceHmd) - unknown signature

• sceHmdInternalSetDefaultLedData (libSceHmd) - unknown signature

• sceHmdInternalGetStatusReport (libSceHmd) - unknown signature

• sceHmdGet2dVrCommand (libSceHmd) - unknown signature