Commit Graph

13 Commits

Author SHA1 Message Date
Sergey Sharybin
808ac6debf Prefetching for movie clips
This commit basically implements frames prefetching for
movie clip datablock.

Number of frames to be prefetched is controlled in User
Preferences, System tab, Prefetch Frames option.

Currently prefetching is destructive-less for movie cache,
meaning mo frames will be removed from the cache when while
prefetching. This is because it's half of simplier to
implement, but it also makes sense from tracking point of
view -- we could want to playback in both directions and
removing frames from behind time cursor is not always a
good idea.

Anyway, smarter prefetching strategy could be developed
later.

Some implementation notes:

- Added MEM_CacheLimiter_get_memory_in_use function to get
  memory usage of specified memory limiter.

- Fixed prototype of MEM_CacheLimiter_get_maximum which
  was simply wrong (used wrong data type for output).

- Added some utility functions to movie clip and movie
  cache for direct cache interaction and obtaining cache
  statistics.

- Prefetching is implemented using general jobs system.
  which is invoking from clip draw function.

- Prefetcing will stop as soon other job or playback starts.
  This is done from performance point of view. Jobs will
  likely require lots of CPU power and better to provide
  whole CPU to it.

  Playback is a bit more complicated case. For jpeg sequence
  playback prefetching while paying back is nice. But trying
  to prefetch heavy exr images and doing color space
  conversion slows down both playback and prefetching.

TODO:

- Think of better policy of dealing with already cached frames
  (like when cached frames from other clips prevents frames
  from current clip to be prefetched)

- Currently a bit funky redraw notification happens from
  prefetch job. Perhaps own ND_ is better to have here.

- Hiding clip while prefetch is active in theory shall stop
  prefetching job.

- Having multiple clips opened on file load will prefetch
  frames for only one of them.
2013-03-20 17:03:20 +00:00
Campbell Barton
0c6a0b293f style cleanup 2012-10-28 15:23:16 +00:00
Sergey Sharybin
76ee9783a1 Improved cache management for movie clips from tomato branch
Replace pseudo-LRU approach of determining which buffer
to remove when running out of space allowed for cache
with approach which would remove the frame which is most
far away from newly added frame.

This is still a bit tricky because it's impossible to
distinguish which frame to delete in situation of:

        CCCC...CC
           ^

it's either user wants to extend left segment of cached
frames and buffers from right segment should be removed
or he wants to join this two segments and in that case
buffers from right segment should be removed.

Would need a bit more investigation which situation
is more common in general usecase.

Additional changes:

- Cleanup some memutil files (which are familiar to cache limiter)

- Add option to make moviecache verbose. If DEBUG_MESSAGES is
  defined in moviecache.c detailed logs would be printed to the
  console.

- Movie caches are now named which helps reading debug messages.
2012-07-10 14:43:50 +00:00
Campbell Barton
2b7ca2304a unify include guard defines, __$FILENAME__
without the underscores these clogged up the namespace for autocompleation which was annoying.
2012-02-17 18:59:41 +00:00
Sergey Sharybin
f07f59c760 Cache limiter will now work properly with limits >= 4Gb 2012-01-31 11:11:56 +00:00
Campbell Barton
4a04f72069 remove $Id: tags after discussion on the mailign list: http://markmail.org/message/fp7ozcywxum3ar7n 2011-10-23 17:52:20 +00:00
Nathan Letwory
65687c32fb doxygen: intern/memutil tagged 2011-02-25 11:47:18 +00:00
Campbell Barton
e3c69e6cfe remove unused memutil classes 2011-01-16 19:55:50 +00:00
Campbell Barton
cd97253502 - added GCC warning -Wstrict-prototypes
- fixed bug in paste material, exposed by stricter warnings.
- removed/renamed various shadowed vars.
- removed BGE lamp.colour, only allow lamp.color attribute.
2010-12-03 12:30:59 +00:00
Campbell Barton
081c1205a3 correct fsf address 2010-02-12 13:34:04 +00:00
Chris Want
5d0a207ecb Patch from GSR that a) fixes a whole bunch of GPL/BL license
blocks that were previously missed; and b) greatly increase my
ohloh stats!
2008-04-16 22:40:48 +00:00
Peter Schlaile
ebbd85de25 == Sequencer ==
This fixes Bug #5299 (patch by Vladimir Marek (neuron) ), silencing
Sun CC, which is very picky in it's name mangling behaviour.
2007-01-18 18:22:06 +00:00
Peter Schlaile
57d7ae0365 Adds generic memcache limitor (used by the new sequencer to cache
only a certain amount of frames).
2006-02-05 18:56:30 +00:00