Jun Sota - 2008-08-26

I'm programming h.264 transform filter.
It receives h.264 data from the MP4 splitter filter.
When DirectShow connects each filters, MP4 splitter filter passes SPSs and PPSs to the transform filter at the dwSequenceHeader[] member of the MPEG2VIDEOINFO structure.
Then I have a question.
Who decided the let splitter filter stores SPSs and PPSs into dwSequenceHeader[] member?
I can't find any documentation about this.
Is it a documented way?