CODECINIFILEINFO Field - ulYalignment

ulYalignment (ULONG)

Indicates the top byte alignment of the starting address of the video window. This field is valid only when CODEC_MULAPERATURE and CODEC_DIRECT_DISPLAY are set. This information is provided by the block-oriented decompressor to allow the system to position the top left video window corner on a specific scan boundary to avoid dividing it between two 64KB apertures. The remainder of the 64 is divided by the ulAlignment and scale factor (for example, 2 for pel doubling) must be 0. This field is ignored when CODEC_SCALE_CONTINUOUS is specified.

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