Parse AFD (Active Format Description) data
See https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
Section 6.2
for MPEG 2 data layout.
Related MR: gst-plugins-base!191 (merged)
See https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
Section 6.2
for MPEG 2 data layout.
Related MR: gst-plugins-base!191 (merged)