package/macosx: remove legacy code
demux: ogg: fix PCR from opus granule.

Can't use granule 0 as it means there's still no valid first sample
after processing packet.
Fix start gap on opus webradios.
demux: ogg: add PCR gap handling warning
demux: oggseek: fix timestamp computation for opus
encoder: dirac: fix heap overflow
encoder: dirac: match source geometry

refs #10386
Still junk on bottom due to invalid plane->i_visible_lines
mux: ogg: uninitialized value

1st header write can contain random values but that
triggers false positive on valgrind.
encoders: shroedinger: fix invalid write
mux: ogg: compute correct dt/pt/delay/distance for dirac.

refs #9648
(no fix as codec sends bad pts sequence)
demux: asf: don't warn on stop.

Can still have unsent blocks.