`BKE_sequencer_prefetch_get_original_sequence()` didn't look in metas
and returned NULL. This caused crash in disk cache that was trying to
read seq->name.
Add function that will look in meta strips recursively and condition
that seq must not be NULL.
Reviewed By: brecht
Maniphest Tasks: T76033
Differential Revision: https://developer.blender.org/D7597
The `BKE_animsys.h` and `anim_sys.c` files already had a an "AnimData
API" section. The code in that section has now been split off, and
placed into `BKE_anim_data.h` and `anim_data.c`.
All files that used to include `BKE_animsys.h` have been adjusted to
only include the animation headers they need (sometimes none).
No functional changes.
When enabled prefetching(preview panel>view settings), a pernament running job
is created, that will render frames in the background until the cache is full.
If the cache is not filled fast enough, prefetch job suspends itself
at the last moment and will wait until it has chance to "catch up".
Effectively this will decouple rendering to separate thread, so rendering
itself is a bit faster.
Cache recycling behavior will be changed to "free furthest frame to the left
of playhead if possible, otherwise rightmost frame".
Reviewed By: brecht
Differential Revision: https://developer.blender.org/D5386
Richard Antalik
Richard Antalik
Sybren A. Stüvel
Dalai Felinto
Bastien Montagne
Brecht Van Lommel
Jacques Lucke