Reworks to the shuffle system to improve performance and allow fast shuffling from a big library (but this work for all database views)

This improvement brings a huge performance improvement to start a random mix of your library. Previously, the only way to do this was to increase the size of a playlist with absurd sizes number. Now it will respect the limitation but will insert random songs from the current view.

Database: Add true random songs in playlist if it is gonna exceed its maximum capacity

More context is available here : https://www.reddit.com/r/rockbox/comments/1ez0mq4/i_developped_true_full_library_shuffle_for/

Also :
- Improved layout in the DB browser
- New default max playlists capacity is now 2000 on old PortalPlayer targets to give a better user experience and not having to wait dozens of seconds while creating a playlist
- "Show insert shuffled" option is now true by default
- Add a new shortcut to play all songs shuffled in the DB browser
- Now the feature is fully optional and enabled only on targets that have more than 2MB of RAM
- Add entries about this feature in the manual to explain it to the users
Change-Id: I1aebaf7ebcff2bf907080f1861027d530619097c

Change-Id: I3354923b148eeef1975171990e814a1a505d1df0

1 files changed, 6 insertions, 1 deletions

diff --git a/apps/onplay.h b/apps/onplay.h
index 74dc045db3..03861e9cf6 100644
--- a/apps/onplay.h
+++ b/apps/onplay.h
@@ -25,7 +25,12 @@
 #include "menu.h"
 #endif
 
-int onplay(char* file, int attr, int from_context, bool hotkey);
+enum {
+    ONPLAY_NO_CUSTOMACTION,
+    ONPLAY_CUSTOMACTION_SHUFFLE_SONGS,
+};
+
+int onplay(char* file, int attr, int from_context, bool hotkey, int customaction);
 int get_onplay_context(void);
 
 enum {