HELIX_FEATURE_META

HELIX_FEATURE_PREFETCH

HELIX_FEATURE_VIEWPORT

HELIX_FEATURE_VIEWSOURCE

HELIX_FEATURE_MEDIAMARKER

HELIX_FEATURE_NESTEDMETA

HELIX_FEATURE_NEXTGROUPMGR

HELIX_FEATURE_SYSTEMREQUIRED

HELIX_FEATURE_XMLPARSER

HELIX_FEATURE_PLAYERNAVIGATOR

HELIX_FEATURE_EVENTMANAGER


are all defines used for RAM/SMIL streaming.... so ignore the ifdefs for those!