question: private int decodeCodeTableIndexes ( ) { if ( ctx . usedQuantUnits == 0 ) { return 0 ; } ctx . useFullTable = br . readBool ( ) ; for ( int chNum = 0 ; chNum < numChannels ; chNum ++ ) { Arrays . fill ( ctx . channels [ chNum ] . quTabIdx , 0 ) ; int ret = decodeChannelCodeTab ( chNum ) ; if ( ret < 0 ) { return ret ; } } return 0 ; }
target:  Decode code table indexes for each channel.