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Kacper Michajłow
69891c4070
Save the cache to separate files to avoid loading/saving a huge combined
libplacebo.cache. This approach allows the saving of only new cache
objects and avoids resaving the entire cache, especially even if only a
tiny change was made.
This commit improves the cold start time of mpv and avoids saving data
when it's not necessary.
Number of changes were made:
- each cached object is saved in its own file
- cache files are prefixed with the name of cached object
- cache directory is cleaned on each uninit
- the least recently used cache files are removed if cumulative cache
size is above limit
- files used in the recent 24 hours are not removed to allow changes
to mpv.conf without worrying about the cache being removed during
experimentation
- shader cache size limit is set to 128 MiB
- icc cache size limit is set to 1.5 GiB
- cache objects are loaded/saved as needed
This commit eliminates the runtime performance penalty associated with
the size cache. While we continue to maintain the cache limit to prevent
retaining stale objects, mpv now only loads a small subset of files that
are currently required for playback, instead of loading all files.