WLXPipeline.dll

Source	src/WLXPipeline/
CMake target	WLXPipeline
Type	Win32 DLL
Family	Pipeline & effects targets

At a glance

The media processing pipeline factory. Its single meaningful export, GetPipelineCreateFunctions, hands callers a versioned function table for creating, driving, and introspecting media pipeline stages.

Public surface

From WLXPipeline.def:

GetPipelineCreateFunctions @1

The returned table (from the module README):

Field	Meaning
uVersion	Table version
uStructSize	Size of the struct (ABI check)
pfnCreate	Create a pipeline object
pfnDestroy	Destroy a pipeline object
pfnProcess	Process a media sample
pfnGetInfo	Query pipeline info

Contract coverage

GetPipelineCreateFunctions returns S_OK and a real 6-pointer table. Covered by tests/mmr-python/wmmr/contracts/wlxpipeline.py.

Reference-stub divergence

The reference parity build (build_clean) returns E_NOTIMPL from GetPipelineCreateFunctions — our real table wins, and the contract pins it. This is Stub Design ground rule 3 in action: where the reference is stub-like, the real implementation is the oracle.

Implementation notes

• Classic module layout: CMakeLists.txt, WLXPipeline.def, WLXPipeline.cpp/.h, dllmain.cpp.
• __stdcall entry, decorated per the reference.

Testing

• Contract: tests/mmr-python/wmmr/contracts/wlxpipeline.py.
• Exercise app: apps/pipeline-graph (submodule).

Analysis artifacts

analysis/WLXPipeline/.