question: private static boolean processFtypAtom ( ParsableByteArray atomData ) { atomData . setPosition ( Atom . HEADER_SIZE ) ; int majorBrand = atomData . readInt ( ) ; if ( majorBrand == BRAND_QUICKTIME ) { return true ; } atomData . skipBytes ( 4 ) ; while ( atomData . bytesLeft ( ) > 0 ) { if ( atomData . readInt ( ) == BRAND_QUICKTIME ) { return true ; } } return false ; }
target:  Process an ftyp atom to determine whether the media is QuickTime.