AnyPS5/docs/dev/debt/libSceVdecCore.md

libSceVdecCore technical debt

Unknown function info

• Additional libSceVdecCore exports - the name/NID pairs below are defined exports in the firmware 13.60 inventory. Their ABIs and behaviour are unknown. Parameterless int declarations are import-resolution placeholders, not established signatures; every call throws NotImplemented_nid_no_patch.

Name	NID
sceVdecCoreQueryMemorySizeSvp	uAsJCITzX5k

• sceVdecCoreAnalyzeStream, sceVdecCoreFinalizeComputeResource, sceVdecCoreInitializeComputeResource, sceVdecCoreSetDecodeOutputSw, sceVdecCoreSyncDecodeOutputSw and sceVdecCoreTrySyncDecodeOutputSw (libSceVdecCore) - names and NIDs are present in the PS5 3.20 export inventory, but no credible prototypes were found. The declarations have no parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified

Functional

• sceVdecCoreQueryInstanceSize, sceVdecCoreQueryFrameBufferInfo, sceVdecCoreQueryComputeResourceInfo, sceVdecCoreCreateDecoder, sceVdecCoreDeleteDecoder and sceVdecCoreMapMemoryBlock (libSceVdecCore) - console behaviour is unmeasured. The signatures, error codes, 1920x1080 and 16-frame defaults and slot cutting follow shadPS4's vdeccore.cpp, and the sizes are shadPS4's constants, not console values: instance 0x40000, compute 0x10000, and a frame buffer of NV12 plus 0x1000 rounded to 64 KiB. CreateDecoder opens an FFmpeg H.264 or HEVC context and starts the decoder's decode thread, which DeleteDecoder stops and joins; the memory info and compute queue are ignored, and a handle CreateDecoder did not return, or a codec that is unavailable or fails to open, throws
• sceVdecCoreResetDecoder, sceVdecCoreSetDecodeInput, sceVdecCoreSyncDecode, sceVdecCoreGetDecodeOutput, sceVdecCoreFlushDecodeOutput, sceVdecCoreSyncDecodeWptr, sceVdecCoreTrySyncDecode and sceVdecCoreTrySyncDecodeWptr (libSceVdecCore) - console behaviour is unmeasured; they follow shadPS4's vdeccore.cpp. Decoding is FFmpeg software decoding on a host thread. GetDecodeOutput's pitch is the width rounded to 64 while CreateDecoder's frame buffer size uses the horizontal alignment (256 by default), as in shadPS4. Without a caller frame buffer or mapped slot a picture goes to host memory the decoder owns, and the empty-queue fields are shadPS4's. Unlike shadPS4, a picture larger than its frame buffer throws, an access unit too large for an FFmpeg packet is refused, and the NV12 copy goes row by row