D3D11 CORRUPTION: ID3D11DeviceContext::Unmap: Two threads were found to be executing functions associated with the same Device[Context] at the same time. This will cause corruption of memory. Appropriate thread synchronization needs to occur external to the Direct3D API (or through the ID3D10Multithread interface). 3628 and 17364 are the implicated thread ids. [ MISCELLANEOUS CORRUPTION #28: CORRUPTED_MULTITHREADING]

I use IMFTransform in thread A and thread B and thread C and they always throw the exception of CORRUPTION

if I use ID3D10Multithread to enable multi-thread will it be slower than semaphore?