Provide "quick" option for loading database into RAM

The directory cache and the database's Load to RAM feature
each result in a much better user experience.

But, when both features are enabled at the same time, it
can take a very long time on older players - easily several
minutes for larger libraries - until all of the database's
dircache references have been updated.

Include a 'Quick' option that causes the database to ignore
dircache references which can *significantly* reduce disk
activity after booting.

Change-Id: I25ae779c97d03885b06d5a28d8be55c0d05692a5

1 files changed, 8 insertions, 1 deletions

diff --git a/apps/settings.h b/apps/settings.h
index 09a01b40a1..ce29e020f7 100644
--- a/apps/settings.h
+++ b/apps/settings.h
@@ -136,6 +136,13 @@ enum
 };
 #endif
 
+enum
+{
+    TAGCACHE_RAM_OFF = 0,
+    TAGCACHE_RAM_ON = 1,
+    TAGCACHE_RAM_QUICK = 2
+};
+
 /* dir filter options */
 /* Note: Any new filter modes need to be added before NUM_FILTER_MODES.
  *       Any new rockbox browse filter modes (accessible through the menu)
@@ -576,7 +583,7 @@ struct user_settings
 #endif
 #ifdef HAVE_TAGCACHE
 #ifdef HAVE_TC_RAMCACHE
-    bool tagcache_ram;        /* load tagcache to ram? */
+    int tagcache_ram;        /* load tagcache to ram: 1=on, 2=quick (ignore dircache) */
 #endif
     bool tagcache_autoupdate; /* automatically keep tagcache in sync? */
     bool autoresume_enable;   /* enable auto-resume feature? */