Performance issues can occur when a video output sample has a 2D buffer, because winegstreamer currently outputs only to a linear buffer, which must then be copied into the 2D buffer. Worse, a linear lock of the 2D buffer requires the current contents to be copied to a linear buffer, even when we intend to overwrite it, because MF linear buffers do not support write-only locking.
-- v5: winegstreamer: Support 2D sample buffer. mf/tests: Test color convert 2D buffers. mf/tests: Test WMV decoder 2D buffers. mf/tests: Test H.264 decoder 2D buffers. mf/tests: Test sample copier 2D buffers. mfplat/tests: Test NV12 negative stride in MFCreateMediaBufferFromMediaType(). mf/tests: Remove todo for an H.264 decoder test. mf/tests: Stop checking samples at the end of the expected array.