ccconverter: copy buffer metadata when draining the input
commit abca26efb1571af85339ade9f03a395b3bd975d0
ccconverter: signal cea608 padding as invalid
Outputting a valid but null cea608 byte pair may cause some issues.
commit 10c42dae
ccconverter: also copy buffer metadata when draining
Fixes buffers without PTS/DTS/meta/etc when receiving an EOS with data
still stored in the internal scratch buffer.
commit 404f2cd0
ccconverter: Output the limit hit in debug lines
Fix two case of the input triplet limit not applying in cea608 -> cdp
conversion.