IMFMediaType_(Get|Free)Representation is called by Samurai Maiden, MFInitAMMediaTypeFromMFMediaType could be useful to simplify DMO / MFT transforms implementations.
-- v4: mfplat: Implement IMFMediaType_(Get|Free)Representation. mfplat: Implement MFCreateAMMediaTypeFromMFMediaType. mfplat: Implement MFInitAMMediaTypeFromMFMediaType. mfplat: Use bits per pixel in uncompressed formats metadata. mfplat: Only convert MEDIASUBTYPE for the formats which need it. mfplat/tests: Add IMFMediaType_GetRepresentation tests. mfplat/tests: Add tests for MFCreateAMMediaTypeFromMFMediaType. mfplat/tests: Add tests for MFInitAMMediaTypeFromMFMediaType. mfplat: Add MFInitAMMediaTypeFromMFMediaType stub. mfplat: Add MFCreateAMMediaTypeFromMFMediaType stub. mfplat: Add support for internal MFVideoFormat_A2B10G10R10.