Thomas Guillem authored Oct 12, 2023 and Steve Lhomme committed Oct 17, 2023

Remove all CC related code in es_out.c. CC ESes are now treated as
general Sub ESes with one major difference: it reference a master ES and create
a decoder via the new function `vlc_input_decoder_CreateSubDec()`.

Therefore, only the creation of the Sub Es differs from the main ES.

The code deleting all sub decoders from vlc_input_decoder_Delete() has
been removed since the es_out is already taking care of removing all
SubESes related to one main ES. To enforce it, the main decoder will now
assert that all sub decoders are removed on deletion.

All vlc_input_decoder_ functions are now called, regardless of the ES
type (main or sub), so this fix the following issues:
 - CC decoders are now drained
 - CC decoders use their own clocks
 - CC decoders get the correct delay/rate/pause_state

vlc_input_decoder_StartWait(), vlc_input_decoder_StopWait() and
vlc_input_decoder_Wait() need a special check since sub decoders pacing
depends on their master decoder.