This will make it possible to move some specific behavior out of the AAC decoder transform, and ultimately make it easier to have a generic audio decoder.
-- v2: mfplat: Support compressed WAVEFORMATEX in MFCreateWaveFormatExFromMFMediaType. mfplat: Support AAC format attributes in MFInitMediaTypeFromWaveFormatEx. mfplat/tests: Test MFWaveFormatExConvertFlag_ForceExtensible with HEAACWAVEFORMAT. mfplat/tests: Add MFInitMediaTypeFromWaveFormatEx tests with HEAACWAVEFORMAT. mfplat/tests: Test MFInitMediaTypeFromWaveFormatEx wrt MF_MT_FIXED_SIZE_SAMPLES. include: Add HEAACWAVEINFO and HEAACWAVEFORMAT definitions.