question: private static int sbrMapping ( Context ac , SpectralBandReplication sbr , SBRData chData , int eA [ ] ) { for ( int i = 1 ; i < 8 ; i ++ ) { Arrays . fill ( chData . sIndexmapped [ i ] , 0 ) ; } for ( int e = 0 ; e < chData . bsNumEnv ; e ++ ) { final int ilim = sbr . n [ chData . bsFreqRes [ e + 1 ] ] ; int table [ ] = chData . bsFreqRes [ e + 1 ] != 0 ? sbr . fTablehigh : sbr . fTablelow ; if ( sbr . kx [ 1 ] != table [ 0 ] ) { log . error ( String . format ( "kx != f_table{high,low}[0]. Derived frequency tables were not regenerated." ) ) ; sbrTurnoff ( sbr ) ; return AAC_ERROR ; } for ( int i = 0 ; i < ilim ; i ++ ) { for ( int m = table [ i ] ; m < table [ i + 1 ] ; m ++ ) { sbr . eOrigmapped [ e ] [ m - sbr . kx [ 1 ] ] = chData . envFacs [ e + 1 ] [ i ] ; } } int k = ( chData . bsNumNoise > 1 ) && ( chData . tEnv [ e ] >= chData . tQ [ 1 ] ) ? 1 : 0 ; for ( int i = 0 ; i < sbr . nQ ; i ++ ) { for ( int m = sbr . fTablenoise [ i ] ; m < sbr . fTablenoise [ i + 1 ] ; m ++ ) { sbr . qMapped [ e ] [ m - sbr . kx [ 1 ] ] = chData . noiseFacs [ k + 1 ] [ i ] ; } } for ( int i = 0 ; i < sbr . n [ 1 ] ; i ++ ) { if ( chData . bsAddHarmonicFlag ) { final int m_midpoint = ( sbr . fTablehigh [ i ] + sbr . fTablehigh [ i + 1 ] ) > > 1 ; chData . sIndexmapped [ e + 1 ] [ m_midpoint - sbr . kx [ 1 ] ] = chData . bsAddHarmonic [ i ] * ( e >= eA [ 1 ] || ( chData . sIndexmapped [ 0 ] [ m_midpoint - sbr . kx [ 1 ] ] == 1 ) ? 1 : 0 ) ; } } for ( int i = 0 ; i < ilim ; i ++ ) { int additional_sinusoid_present = 0 ; for ( int m = table [ i ] ; m < table [ i + 1 ] ; m ++ ) { if ( chData . sIndexmapped [ e + 1 ] [ m - sbr . kx [ 1 ] ] != 0 ) { additional_sinusoid_present = 1 ; break ; } } Arrays . fill ( sbr . sMapped [ e ] , table [ i ] - sbr . kx [ 1 ] , table [ i + 1 ] - sbr . kx [ 1 ] , additional_sinusoid_present ) ; } } System . arraycopy ( chData . sIndexmapped [ chData . bsNumEnv ] , 0 , chData . sIndexmapped [ 0 ] , 0 , chData . sIndexmapped [ 0 ] . length ) ; return 0 ; }
target:  High Frequency Adjustment (14496-3 sp04 p217) and Mapping (14496-3 sp04 p217)